JP2894331B2 - Thermal storage type air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerative air conditioner having a primary circuit and a secondary circuit, and more particularly to an improvement in a heat storage circuit and a source for generating a driving force for transporting a secondary refrigerant. Things.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 3-51668, a regenerative air conditioner includes a compressor, a four-way switching valve, a heat source side heat exchanger, an expansion mechanism, a main heat source, and a heat exchanger. A heat storage provided with a heat storage tank provided with a primary circuit in which an exchanger is connected in order and a secondary circuit in which the main heat exchanger, the conveying means, and the use side heat exchanger are connected in order. Some are provided with a circuit. The heat storage circuit includes a heat storage heat exchanger and a heat source side heat radiation heat exchanger connected to the primary circuit, and includes a use side heat radiation heat exchanger connected to the secondary circuit.

The regenerative air conditioner stores cold heat such as ice or warm heat such as hot water in a heat storage tank via a heat storage heat exchanger, while radiating heat from a heat source side in a primary circuit during cooling operation. While increasing the degree of subcooling of the refrigerant with a heat exchanger,
In the secondary-side circuit, the secondary-side refrigerant takes out cold heat in the use-side heat-radiation heat exchanger and transports it to the use-side heat exchanger to cool the room.

[0004] In the heating operation, in the primary side circuit, the refrigerant is evaporated by the heat source side heat radiating heat exchanger to increase the evaporation capacity, and in the secondary side circuit, the use side heat radiating heat exchanger is used in the secondary side circuit. The secondary-side refrigerant takes out the heat and transports it to the use-side heat exchanger to heat the room.

[0005]

However, in the above-mentioned regenerative air conditioner, the heat storage circuit is provided in the primary circuit by connecting the heat storage heat exchanger and the like to the primary circuit. There was a problem that the system configuration was restricted.

In other words, there are various demands for a heat storage type air conditioner such as a device having a large amount of heat stored in a heat storage tank, a device having a small amount of heat, a device having a large capacity of a heat source circuit, and a device having a small capacity. However, in the conventional heat storage type air conditioner, since the heat storage circuit is provided in the primary side circuit and the heat storage circuit and the heat source circuit are paired, a heat storage circuit having a small heat storage capacity and a heat source circuit having a large heat source capacity are not provided. There was a problem that it was difficult to construct various systems such as combinations.

The primary side circuit is a refrigeration cycle equipped with a compressor. Since the primary side heat medium of the primary side circuit circulates through the heat storage circuit, it is necessary to take measures for lubricating oil. However, there is a problem that operation control becomes complicated.

[0008] Further, in this type of heat storage type air conditioner,
A compressor or a mechanical pump is used as a generation source of a circulation driving force of the secondary refrigerant in the secondary circuit. As a result, power consumption is increased, and mechanical means are used. Therefore, there are many failure factors and the reliability of the entire device is not sufficiently obtained. Was.

The present invention has been made in view of the above points, and aims at enlarging the system configuration, facilitating measures for lubricating oil, simplifying operation control, and further improving the operation control.
It is an object of the present invention to realize a highly reliable means as a source of the circulation driving force of the refrigerant in the secondary circuit.

[0010]

In order to achieve the above object, the present invention provides a primary circuit (20) in which a primary heat medium as a heat source circulates and a secondary circuit (20) in which a secondary heat medium circulates. Secondary circuit (30)
Are provided. A heat storage circuit (40) connected to the secondary circuit (30) is provided so that the secondary heat medium circulates. The circulation driving force of the secondary heat medium is obtained by heating or cooling the secondary heat medium.

Specifically, the first aspect of the present invention is a primary heat exchanger connected to the main heat exchanger (11) such that a primary heat medium serving as a heat source flows through the main heat exchanger (11). The side circuit (20), the main heat exchanger (11) and the use side heat exchanger (33) are connected so that the secondary side heat medium can circulate, and the secondary side heat medium is circulated by the transfer means (60). A secondary circuit (30) for circulating the heat medium and transferring the heat obtained from the primary heat medium in the main heat exchanger (11) to the use side heat exchanger (33); A heat storage circuit (40) that is connected to the secondary circuit (30) so that the secondary heat medium of the secondary circuit (30) circulates and provides heat for heat storage to the heat storage medium. Prepare. The distance between the heat storage circuit (40) and the main heat exchanger (11) is
The secondary heat medium is circulated and the secondary heat medium is used as the main heat exchanger (11).
A heat storage operation in which heat obtained from the primary heat medium is stored in the heat storage medium, and a secondary heat medium circulates between the heat storage circuit (40) and the use side heat exchanger (33). A heat storage utilization operation in which the secondary heat medium conveys the heat stored in the heat storage medium to the utilization heat exchanger (33) to perform air conditioning, and the secondary heat medium circulates through the secondary circuit (30) to perform the air conditioning. The secondary heat medium is configured to execute at least a normal operation of transferring the heat obtained from the primary heat medium in the main heat exchanger (11) to the use side heat exchanger (33) for air conditioning. The conveying means (60) is provided with a pressurizing means (62) for generating a high pressure by heating the liquid-phase secondary heat medium and a low-pressure medium by cooling the gas-phase secondary heat medium. At least one of pressure reducing means (63) for generating
The configuration is such that the difference between the pressure generated in (63) and the pressure in the secondary side circuit (30) obtains the circulating driving force of the secondary side heat medium in each of the above operations.

According to the first aspect of the present invention, in the heat storage operation, the secondary heat medium is operated by the main heat exchanger (1).
This is performed by storing the heat obtained from the primary heat medium in 1) in the heat storage medium. In the operation using heat storage, the secondary heat medium conveys the heat stored in the heat storage medium to the use-side heat exchanger (33) to perform air conditioning. Furthermore, in the normal operation, the secondary side heat medium uses the heat obtained from the primary side heat medium in the main heat exchanger (11) to the use side heat exchanger.
It will be transported to (33) and air-conditioned. In these operations, the driving force for transporting the secondary-side heat medium is controlled by a pressing means.
Means for heating or depressurizing the secondary heat medium in the liquid phase in (62)
It is obtained by the difference between the pressure generated by cooling the gas-phase secondary heat medium in (63) and the pressure in the secondary circuit (30).

According to a second aspect of the present invention, in the regenerative air conditioner according to the first aspect, the transport means is constituted by a driving force generating circuit (60) capable of storing a secondary heat medium in a liquid phase. . The driving source circuit (70) is connected to the driving force generating circuit (60) in a heat-exchangeable manner. The drive source circuit (70) enables circulation of the drive heat medium, and the drive source circuit (70) is supplied with the liquid-phase secondary heat medium of the drive force generation circuit (60) through the secondary circuit ( 30) the driving force generating circuit (60)
Heating means (71) for heating the liquid-side secondary heat medium of the liquid phase; and a driving force generating circuit for supplying the liquid-phase secondary heat medium of the secondary circuit (30).
A cooling means (72) for evaporating the driving heat medium so as to be sucked by the (60) and cooling the gas phase secondary heat medium of the driving force generating circuit (60) is provided.

According to this specific matter, when the driving heat medium circulates in the driving source circuit (70), the heating means (71) heats the liquid phase secondary heat medium of the driving force generating circuit (60),
The secondary heat medium in the liquid phase of the driving force generation circuit (60) is the secondary circuit
Extruded to (30). On the other hand, the gas phase secondary heat medium of the driving force generation circuit (60) is cooled by the cooling means (72), and the liquid phase secondary heat medium of the secondary circuit (30) is cooled by the driving force generation circuit ( 60)
Is sucked. Due to such pushing and sucking operations, the secondary heat medium circulates in the secondary circuit (30).

According to a third aspect of the present invention, in the regenerative air conditioner of the first aspect, the pressurizing means (62) is heated by the heater (71) so that the secondary heat medium in the liquid phase is formed. It is configured to generate high pressure by evaporation.

According to a fourth aspect of the present invention, in the regenerative air conditioner according to the first aspect, the pressurizing means (62) is heated by the Peltier element (71) so that the liquid-side secondary heat medium is heated. It is configured to generate high pressure by evaporation.

According to a fifth aspect of the present invention, in the regenerative air conditioner of the first aspect, the pressure reducing means (63) is cooled by the Peltier element (72) to condense the gaseous secondary heat medium. To generate a low pressure.

According to these specific items, a heat source for obtaining the circulation driving force of the secondary heat medium can be obtained relatively easily.

According to a sixth aspect of the present invention, the primary heat medium serving as a heat source is connected to the main heat exchanger (11, 11 ') so as to flow through the main heat exchanger (11, 11'). The primary side circuit (20), the main heat exchangers (11, 11 ') and the use side heat exchanger (33) are connected so that the secondary side heat medium can circulate, and the circulation drive of the conveying means (60) By force 2
The secondary heat medium is circulated and the secondary heat medium is circulated to the main heat exchanger (11,
11 '), a secondary circuit (30) for transferring heat obtained from the primary heat medium to the use side heat exchanger (33), and a secondary heat medium of the secondary circuit (30) circulates. Connected to the secondary circuit (30) so that
A heat storage circuit (40) for supplying heat for heat storage to the heat storage medium. Also, the heat storage circuit (40) and the main heat exchanger (11, 11 ')
A heat storage operation in which the secondary heat medium circulates between and the secondary heat medium stores heat obtained from the primary heat medium in the main heat exchanger (11, 11 ′) in the heat storage medium; A secondary-side heat medium circulates between the heat storage circuit (40) and the use-side heat exchanger (33), and the secondary-side heat medium conveys heat stored in the heat storage medium to the use-side heat exchanger (33). Operation using heat storage to perform air conditioning, and the secondary heat medium is used as a secondary circuit
The secondary side heat medium is circulated through (30) and the heat obtained from the primary side heat medium in the main heat exchangers (11, 11 ') is transferred to the use side heat exchanger (33) for air conditioning. It is configured to execute at least the normal operation. And, in the main heat exchanger (11), the conveying means (60)
A high pressure is generated by heating the liquid-side secondary heat medium, and a function of generating a circulating driving force of the secondary heat medium by a difference between the high pressure and the pressure in the secondary circuit (30). It has a configuration provided.

According to an eighth aspect of the present invention, the circuit configuration and the operation are the same as those of the fifth aspect of the present invention, and the secondary heat of the gas phase of the conveying means (60) is provided to the main heat exchanger (11 '). A configuration is provided in which a low pressure is generated by cooling the side heat medium, and a function of generating a circulating drive force of the secondary side heat medium by a difference between the low pressure and the pressure in the secondary circuit (30). .

According to these specific items, the primary side circuit (20)
In addition, a function as a heat source and a function as a drive source for obtaining a transfer driving force of the secondary-side heat medium can be provided, so that it is not necessary to separately provide the heat source and the means functioning as the drive source. . Therefore, the circuit configuration can be simplified.

According to a seventh aspect of the present invention, in the regenerative air conditioner of the sixth aspect, the primary circuit (20) is a refrigerant circuit for performing a vapor compression refrigeration cycle, and the main heat exchanger is provided.
In (11), the primary heat medium is condensed to heat the secondary heat medium.

According to a ninth aspect of the present invention, in the regenerative air conditioner of the eighth aspect, the primary circuit (20) is a refrigerant circuit for performing a vapor compression refrigeration cycle, and the main heat exchanger is provided.
In (11 ′), the primary heat medium is evaporated to cool the secondary heat medium.

According to these specific items, the source of heat for obtaining the transfer driving force of the secondary-side heat medium is obtained by the refrigerant which performs the vapor compression refrigeration cycle, so that the transfer driving force can be sufficiently obtained. High calorie is obtained.

The invention described in claim 10 is the above-described claim 1-
9. In the regenerative air conditioner according to one of 9, the transport means (60) is provided with a tank means (61) capable of storing a liquid refrigerant. A pressurizing operation of heating the liquid-side secondary heat medium to apply high pressure to the tank means (61) to push out the liquid-phase secondary heat medium from the tank means (61); By cooling the secondary heat medium, a low pressure is applied to the tank means (61) to recover the liquid-phase secondary heat medium to the tank means (61). The refrigerant is circulated.

According to this specific matter, the operation of pushing and recovering the liquid refrigerant from the conveying means (60) can be performed well.

[0027] The invention according to claim 11 is the invention according to claim 10.
In the regenerative air conditioner described in the above, the tank means are connected in parallel to the first and second tank means (61A, 61A).
B). A first pressure action operation for applying a high pressure to the first tank means (61A) and applying a low pressure to the second tank means (61B);
The second pressure action operation for applying a high pressure to the tank means (61B) is alternately switched. Thus, during the first pressure action operation, the liquid-phase secondary heat medium is supplied from the first tank means (61A) to the heat exchanger serving as the evaporator, and the second heat medium is supplied from the heat exchanger serving as the condenser to the second heat exchanger. While the secondary heat medium in the liquid phase is recovered in the tank means (61B), during the second pressure action operation, the secondary heat medium in the liquid phase is transferred from the second tank means (61B) to the heat exchanger serving as the evaporator. In addition to supplying the medium, the refrigerant is circulated from the heat exchanger serving as the condenser to the first tank means (61A) so as to recover the liquid-side secondary heat medium, and the heat is absorbed by the use-side heat exchanger (33). Alternatively, the heat radiation is performed continuously. According to this specific matter, the secondary-side heat medium in the liquid phase is pushed out from one of the tank means, and the secondary-side heat medium in the liquid phase is recovered in the other tank means. Tableware (33)
Is continuously performed. Therefore, the indoor air-conditioning state can be favorably maintained for a long time.

According to the twelfth aspect of the present invention, there is provided the first aspect of the present invention.
11. The regenerative air conditioner according to one of 11 above,
A heat storage tank (41) for storing a heat storage medium, and a heat storage medium transport means (4
4) and a heat storage heat exchanger (42) for exchanging heat between the heat storage medium and the secondary heat medium flowing through the heat storage circuit (40).
(48a) is provided with a heat storage circulation circuit (48) connected in order.

According to this specific matter, the heat storage heat exchanger (42)
By the heat exchange between the secondary heat medium and the heat storage medium in the above, heat storage in the heat storage medium and extraction of heat storage from the heat storage medium are performed. Thus, the piping of the heat storage circuit (40) is connected to the heat storage tank (41).
If it is not disposed in the space, it is suitable for generating ice in the form of slurry during the cold storage operation.

[0030]

Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a regenerative air conditioner (10) of the present embodiment comprises a primary side circuit (20), a secondary side circuit (30), a heat storage circuit (40), and a driving means as a conveying means. A power generation circuit (60) is provided so that the room is air-conditioned. Also,
A water circuit (48) as a heat storage circulation circuit is connected to the heat storage circuit (40) so that heat exchange is possible.

The primary circuit (20) comprises a vapor compression refrigeration cycle, and includes a compressor (21), a four-way switching valve (22), a heat source side heat exchanger (23), and an expansion valve (EV). And the primary side of the main heat exchanger (11)
(11A) are connected in order to form a heat source circuit. The primary circuit (20) is filled with a primary refrigerant as a primary heat medium serving as a heat source, and switches the four-way switching valve (22) to perform a primary cycle between a cooling cycle and a heating cycle. The circulation direction of the side refrigerant is configured to be reversible.

The secondary circuit (30) includes a four-way switching valve (32) connected to the driving force generating circuit (60), an indoor electric valve (EV), an outdoor electric valve (EV), and a use side. Indoor heat exchangers that are heat exchangers
(33) and the secondary side (11B) of the main heat exchanger (11) are connected in order, and are filled with a secondary side refrigerant as a secondary side heat medium, and the four-way switching valve (32) Is switched so that the circulation direction of the secondary refrigerant is reversible between the cooling cycle and the heating cycle.

The main heat exchanger (11) is configured to exchange heat between the primary refrigerant and the secondary refrigerant,
(30) is that during the cooling operation, the secondary refrigerant is condensed by the latent heat of evaporation of the primary refrigerant in the main heat exchanger (11) and evaporates in the indoor heat exchanger (33), while in the heating operation. , The secondary refrigerant is evaporated by the condensation heat of the primary refrigerant in the main heat exchanger (11) and condensed in the indoor heat exchanger (33).

The driving force generating circuit (60) is for generating a circulating driving force for the secondary refrigerant in the secondary circuit (30).
The driving force generation circuit (60) includes a tank (61) for storing a liquid-phase secondary refrigerant, a pressurizing heat exchanger (62) as pressurizing means, and a depressurizing heat exchanger (63) as depressurizing means. ) Are connected by piping. The lower end of the tank (61) is a liquid refrigerant extrusion pipe (64)
Connected to one port of the four-way switching valve (32). A one-way valve (C) that allows only refrigerant flow from the tank (61) to the four-way switching valve (32)
V) is provided. The other port of the four-way switching valve (32) is connected to the middle of the liquid refrigerant push-out tube (64) (upstream of the one-way valve (CV)) by the liquid refrigerant recovery tube (65). The liquid refrigerant recovery pipe (65) is provided with a one-way valve (CV) that allows only refrigerant flow from the four-way switching valve (32) to the tank (61). Thereby, by the switching operation of the four-way switching valve (32), the liquid refrigerant push-out pipe (64) communicates with the indoor unit (1B), and the liquid refrigerant recovery pipe (65) is connected to the main heat exchanger (11). Next side (1
1B), the liquid refrigerant extrusion pipe (64) communicates with the secondary side (11B) of the main heat exchanger (11), and the liquid refrigerant recovery pipe (6
5) can be switched to a state of communicating with the indoor unit (1B).

The pressurizing heat exchanger (62) and the depressurizing heat exchanger (6
3) are connected to the tank (61) in parallel with each other. That is, the upper part of the pressurizing heat exchanger (62) is formed by the pressurizing pipe (62a).
The upper part of the heat exchanger for decompression (63) is connected to the upper part of the tank (61) by a decompression pipe (63a). Pressurizing tube (62a)
And the pressure reducing pipe (63a) has a solenoid valve (SV, SV) on the pressure side and pressure reduction side.
Are provided respectively.

The lower portions of the heat exchanger for pressurization (62) and the heat exchanger for decompression (63) are connected to the middle of the liquid refrigerant push-out pipe (64) by liquid pipes (62b) and (63b), respectively. . The liquid pipe (62b) of the pressurizing heat exchanger (62) has a one-way valve (C) that allows only refrigerant flow from the tank (61) to the pressurizing heat exchanger (62).
V) is provided. Liquid piping (63
b) is provided with a one-way valve (CV) that allows only refrigerant flow from the pressure reducing heat exchanger (63) to the tank (61).

The driving force generating circuit (60) is a heat exchanger for pressurizing.
A drive refrigeration circuit (70) is provided as a drive source circuit for applying heat to (62) and applying heat to decompression heat exchanger (63). The drive refrigeration circuit (70) includes a compressor (73), a condenser (71), an expansion valve (74), and an evaporator (72) connected in order by a refrigerant pipe. The driving refrigeration circuit (70) is filled with a driving refrigerant. The condenser (71) is a heat exchanger for pressurization
The evaporator (72) is connected to the pressure reducing heat exchanger (63) so as to be able to exchange heat. That is, the latent heat of condensation of the driving refrigerant flowing through the condenser (71) gives the heat to the heat exchanger for pressurization (62), and the latent heat of evaporation of the driving refrigerant flowing through the evaporator (72) causes the heat exchanger for decompression (63). ) Is configured to apply cold heat. Further, the pressurizing heat exchanger (62) is arranged at a position lower than the tank (61),
(63) is arranged at substantially the same height as the tank (61).
Therefore, the liquid-phase secondary refrigerant is stored in the pressurizing heat exchanger (62), and the gas-phase secondary refrigerant is stored in the depressurizing heat exchanger (63).

As a feature of the present invention, the heat storage circuit (40) circulates the secondary refrigerant between the secondary storage circuit (30) and the secondary storage circuit (30).
The heat storage operation is performed using the secondary refrigerant as a heat source. That is, a water circuit (48) is connected to the heat storage circuit (40), and the water in the water circuit (48) is cooled or heated by cooling or heating the water in the water circuit (48). ) To store heat. Specifically, in the heat storage circuit (40), one end of the refrigerant side (42A) of the heat storage heat exchanger (42) is connected to the gas line of the secondary circuit (30) via the heat storage gas pipe (40a). At the other end of the refrigerant side (42A) of the heat storage heat exchanger (42), a heat storage liquid pipe (40
b) is connected. This heat storage liquid pipe (40b) has an electric valve (E
V), and the upstream side of the electric valve (EV) branches off and is connected to the middle of the liquid refrigerant push-out pipe (64) and the liquid refrigerant recovery pipe (65). An electromagnetic valve (SV) is provided on a branch pipe connected to the liquid refrigerant extrusion pipe (64), and a one-way valve (CV) is provided on a branch pipe connected to the liquid refrigerant recovery pipe (65). This one way valve
(CV) allows only refrigerant flow from the electric valve (EV) to the liquid refrigerant recovery pipe (65).

The water circuit (48) includes a heat storage tank (41) in which a heat storage medium such as water is stored and a circulation pump as a heat storage medium transport means.
(44) and the water side (42B) of the heat storage heat exchanger (42) are connected by a water pipe (48a) as a heat storage pipe so as to form a closed circuit. That is, the water circulating in the water circuit (48) exchanges heat with the secondary refrigerant in the heat storage heat exchanger (42) to perform a heat storage operation on the heat storage medium or a heat storage extraction operation. ing.

The primary circuit (20) is a main heat exchanger (11).
And the secondary unit (1A)
The indoor heat exchanger (33) and the electric valve (EV) in (30) are configured as an indoor unit (1B), and the driving force generation circuit (60)
Is configured as a driving force generating unit (1D), and the heat storage circuit (40) is configured as a heat storage unit (1C) together with a water circuit (48).

The regenerative air conditioner (10) includes a cold heat storage operation for storing cold heat, a warm heat storage operation for storing warm heat, a heat storage cooling operation for cooling a room using cold heat, and a heat storage cooling operation. And a normal cooling operation for cooling the room using the primary refrigerant as a heat source, and a normal heating operation for heating the room using the primary refrigerant as a heat source. I have.

-Operation- Next, the operation of the regenerative air conditioner will be described.

<Cold Heat Storage Operation> As shown in FIG. 2, in the case of storing cold heat, in the primary circuit (20), the four-way switching valve (22) is switched to the solid line side to discharge from the compressor (21). The condensed primary refrigerant is condensed in the heat source side heat exchanger (23) and expanded by the expansion valve (EV).
Circulation is performed on the primary side (11A) of the main heat exchanger (11) and returns to the compressor (21).

In the secondary circuit (30), the four-way switching valve (32) is switched to the solid line side, and the indoor electric valve (EV) is closed. In addition, the electric valve (EV) on the outdoor side and the solenoid valve (S
V) and the electric valve (EV) are opened, and the drive refrigeration circuit (7
0) The compressor (73) is driven. Further, the circulating pump (44) of the water circuit (48) is driven.

As a result, in the drive refrigeration circuit (70), the drive refrigerant discharged from the compressor (73) is condensed in the condenser (71), decompressed by the expansion valve (74), and then decompressed by the evaporator (72). ) To perform a refrigerant circulation operation such as evaporation. By this refrigerant circulation operation,
In the heat exchanger for pressurization (62), the liquid refrigerant inside is heated and evaporated by the condenser (71), and a high pressure is thereby generated. On the other hand, in the heat exchanger for pressure reduction (63), the gas refrigerant inside is cooled and condensed by the evaporator (72), and accordingly, a low pressure is generated. Further, the pressurizing side solenoid valve (SV) and the pressure reducing side solenoid valve (SV) of the driving force generating circuit (60) are alternately switched between open and closed states at predetermined time intervals. That is, when the pressurizing side solenoid valve (SV) is open, the pressurizing heat exchanger (62) communicates with the tank (61), and high pressure acts on the tank (61), and the depressurizing side solenoid valve ( When the (SV) is open, the pressure reducing heat exchanger (63) communicates with the tank (61), and a low pressure acts on the tank (61).

Thus, as shown by the arrow in FIG. 2, when high pressure is acting on the tank (61),
The liquid-side secondary refrigerant in the liquid phase is pushed out to the liquid refrigerant push-out pipe (64). This secondary refrigerant flows through the heat storage liquid pipe (40b),
Evaporates in the heat storage heat exchanger (42), and then heat storage gas piping (4
It flows into the main heat exchanger (11) via 0a). This main heat exchanger
In (11), the secondary refrigerant is condensed by the latent heat of evaporation of the primary refrigerant. When the low pressure acts on the tank (61) by the switching operation of the pressurizing and depressurizing solenoid valves (SV, SV), the secondary refrigerant is supplied to the four-way switching valve (32) and the liquid refrigerant. It is collected in the tank (61) via the collection pipe (65). By the switching operation of the solenoid valves (SV, SV), the circulation operation of the secondary refrigerant is performed. On the other hand, the water circulating in the water circuit (48) is cooled by the secondary refrigerant evaporating in the heat storage heat exchanger (42), iced, and collected in the heat storage tank (41). Stored as a source.

A part of the secondary refrigerant extruded from the tank (61) is introduced from the liquid pipe (62b) to the pressurizing heat exchanger (62), and is used to pressurize the inside of the tank (61). Used as Part of the liquid refrigerant condensed in the heat exchanger for decompression (63) is returned from the liquid pipe (63b) into the tank (61), and the secondary circuit (30)
Is circulated as a refrigerant.

<Heat-Storage Utilizing Cooling Operation (I)> There are two modes of the heat-storage utilizing cooling operation in this embodiment. First, the first type of operation will be described. As shown in FIG. 3, the primary circuit (20), the driving refrigeration circuit (70) and the water circuit (4
8) is driven in the same manner as in the cold storage operation described above,
The driving refrigerant and cold water are circulated. In this operation as well, the switching operation of the solenoid valves (SV, SV) is performed in the same manner as in the cold storage operation described above, so that the state in which high pressure acts in the tank (61) and the state in which low pressure acts are alternately switched. The side refrigerant circulates.

The four-way switching valve (32) of the secondary circuit (30) is switched to the solid line side, and the heat storage liquid pipe (40b) and the electric valves (EV, EV) on the indoor side and the outdoor side are opened to store heat. Solenoid valve (SV) for liquid piping (40b)
To close. As a result, the secondary-side liquid refrigerant pushed out of the tank (61) by the action of high pressure in the same manner as in the cold storage operation described above reaches the indoor unit (1B) via the four-way switching valve (32) and exchanges indoor heat. Evaporate in the vessel (33). Thereby, the indoor air is cooled. Thereafter, a part of the refrigerant passes through the heat storage gas pipe (40a) and is transferred to the water circuit (48) in the heat storage heat exchanger (42).
Is exchanged with cold water circulating through to condense.
Other refrigerants are condensed in the main heat exchanger (11) by latent heat of evaporation of the primary refrigerant. These condensed refrigerants join in the liquid refrigerant recovery pipe (65) and are recovered in the tank (61).

As described above, the room is cooled by utilizing the cold heat stored in the heat storage tank (41) and the latent heat of evaporation of the primary refrigerant.

<Heat Storage Utilizing Cooling Operation (II)> Next, a second type of heat storage utilizing cooling operation will be described. In this embodiment,
As shown in FIG. 4, the primary side circuit (20) is stopped.
The operation of each of the other circuits is the same as that of the above-described first type cooling operation using heat storage. Thereby, the liquid refrigerant pushed out from the tank (61) reaches the indoor unit (1B) via the four-way switching valve (32), evaporates in the indoor heat exchanger (33), and cools the indoor air. Thereafter, this refrigerant exchanges heat with cold water circulating in the water circuit (48) in the heat storage heat exchanger (42) via the heat storage gas pipe (40a) to condense, and the liquid refrigerant recovery pipe (65 ) And is collected in the tank (61).

As described above, in this operation, the room is cooled by using only the cold stored in the heat storage tank (41).

<Normal Cooling Operation> As shown in FIG. 5, when the normal cooling operation is performed using the primary refrigerant as a heat source, the primary circuit (20) performs the above-described first-type heat storage cooling operation. A similar refrigerant circulation operation is performed. That is, the four-way switching valve (22)
To the solid line side, the primary refrigerant discharged from the compressor (21) is condensed in the heat source side heat exchanger (23), expanded by the expansion valve (EV), and evaporated in the main heat exchanger (11). Circulation to return to the compressor (21). Further, the circulation pump (44) of the water circuit (48) stops.

In the secondary circuit (30), the four-way switching valve (32) is switched to the solid line side to open the outdoor and indoor electric valves (EV). In addition, the electric valve (EV) and the solenoid valve (SV) of the heat storage circuit (40)
Is closed. Thus, the liquid-phase secondary refrigerant extruded from the tank (61) flows through the four-way switching valve (32) to the indoor heat exchanger (33), and evaporates in the indoor heat exchanger (33). To cool the room air. Thereafter, the secondary refrigerant is supplied to the main heat exchanger (1
It flows to 1) and is condensed by the latent heat of vaporization of the primary refrigerant.
The circulation returning to the tank (61) via (32) is performed. That is, the secondary-side refrigerant conveys cold heat, which is latent heat of evaporation of the primary-side refrigerant, to the indoor heat exchanger (33) to cool the room.

<Heat Storage Operation> As shown in FIG. 6, when storing heat, the primary circuit (20) switches the four-way switching valve (22) to the broken line side and discharges from the compressor (21). The primary-side refrigerant condenses in the main heat exchanger (11), expands in the electric valve (EV), evaporates in the heat-source-side heat exchanger (23), and returns to the compressor (21).
Further, the circulation pump (44) of the water circuit (48) is driven to circulate water.

The secondary side circuit (30) switches the four-way switching valve (32) to the broken line side, closes the indoor electric valve (EV), and opens the outdoor electric valve (EV). In the heat storage liquid pipe (40b), the electric valve (EV) is opened and the solenoid valve (SV) is closed. Thereby, the liquid-phase secondary refrigerant extruded from the tank (61) flows through the four-way switching valve (32) to the main heat exchanger (11) and evaporates with the condensation latent heat of the primary refrigerant, Thereafter, the secondary refrigerant flows through the heat storage gas pipe (40a), flows into the heat storage heat exchanger (42), condenses in the heat storage heat exchanger (42), and returns to the tank (61). That is, the secondary-side refrigerant heats the heat storage medium of the water circuit (48) in the heat storage heat exchanger (42) and stores heat such as hot water.

<Heating operation using heat storage (I)> There are two types of heating operation using heat storage in which heating operation is performed using stored heat. First, the first type of operation will be described. As shown in FIG. 7, in this operation, the primary circuit (2
0) is stopped. In addition, the circulation pump (44) of the water circuit (48)
To circulate hot water.

In the secondary circuit (30), the four-way switching valve (32) is switched to the broken line side, and the electric valve (EV) on the indoor side is opened and the electric valve (EV) on the outdoor side is closed. In addition, the electric valve (EV) and the solenoid valve (SV) of the heat storage liquid pipe (40b) are opened. As a result, the secondary refrigerant extruded from the tank (61) is stored in the heat storage liquid pipe (40).
b), flows into the heat storage heat exchanger (42), evaporates with the heat of the warm water circulating in the water circuit (48), and then the secondary refrigerant flows into the indoor heat exchanger (33) and The air is condensed in the heat exchanger (33) to heat the room air. Thereafter, the secondary refrigerant is supplied to the four-way switching valve (3
2) and circulation returning to the tank (61) via the liquid refrigerant recovery pipe (65). That is, the secondary-side refrigerant conveys the heat of the heat storage medium to the indoor heat exchanger (33) to heat the room.

<Heat storage utilizing heating operation (II)> Next, the second type of heat storage utilizing heating operation will be described. In this embodiment,
As shown in FIG. 8, the primary side circuit (20) is driven.
Further, the circulation pump (44) of the water circuit (48) is driven to circulate hot water.

In the secondary circuit (30), the four-way switching valve (32) is switched to the broken line side, and the indoor electric valve (EV) and the outdoor electric valve (EV) are opened. In addition, the electric valve (E
V) and solenoid valve (SV) are opened. Thereby, the tank (61)
Part of the secondary refrigerant extruded from the heat exchanger for heat storage
In (42), heat is exchanged with the warm water circulating in the water circuit (48) to evaporate, and the others are passed through the four-way switching valve (32) to the main heat exchanger.
It reaches (11) and evaporates due to the latent heat of condensation of the primary refrigerant. The secondary refrigerant flowing into this main heat exchanger (11) is an outdoor solenoid valve (SV).
Is adjusted by the flow rate. Then, this secondary refrigerant is
After merging in the gas line, the air is condensed in the indoor heat exchanger (33) to heat the indoor air. And this refrigerant is a four-way switching valve
(32) and circulation returning to the tank (61) via the liquid refrigerant recovery pipe (65). That is, the secondary-side refrigerant conveys the heat of the heat storage medium and the latent heat of condensation of the primary-side refrigerant to the indoor heat exchanger (33) to heat the room.

<Normal Heating Operation> As shown in FIG. 9, when performing normal heating operation using the primary refrigerant as a heat source, the primary circuit (20) moves the four-way switching valve (22) to the broken line side. The primary refrigerant discharged from the compressor (21) is condensed in the main heat exchanger (11), expanded by the expansion valve (EV), evaporated in the heat source heat exchanger (23), and evaporated. Perform circulation to return to 21). Further, the circulation pump (44) of the water circuit (48) stops.

In the secondary circuit (30), the four-way switching valve (32) is switched to the broken line side. In addition, electric valves (E
V) is opened, and the electric valve (EV) and the solenoid valve (SV) of the heat storage liquid pipe (40b) are closed. Thus, the liquid-phase secondary refrigerant discharged from the tank (61) flows through the four-way switching valve (32) to the main heat exchanger (11) and evaporates with the latent heat of condensation of the primary refrigerant,
After that, it flows to the indoor heat exchanger (33) and the indoor heat exchanger (33)
To heat the room air. Thereafter, the secondary refrigerant circulates back to the tank (61) via the four-way switching valve (32). In other words, the secondary-side refrigerant conveys heat, which is latent heat of condensation of the primary-side refrigerant, to the indoor heat exchanger to heat the room.

As described above, according to the present embodiment, the heat storage circuit (40) is connected to the secondary circuit (30), and the heat of the primary circuit (20) is transferred via the secondary refrigerant. Since the heat is stored, the primary circuit (20) can be constituted by one independent circuit, and the heat source capacity can be arbitrarily set by connecting a plurality of primary circuits (20). it can. At the same time, the heat storage capacity can be arbitrarily set by connecting a plurality of heat storage circuits (40).

As a result, a system in which various heat source capacities and heat storage capacities are combined can be constructed, and the degree of freedom of combination can be improved.

Further, since the primary side circuit (20) is only the heat source circuit, the lubricating oil can be easily managed, so that the operation control can be facilitated.

The primary circuit (20) and the secondary circuit (3
0), the existing piping can be reused.

Further, since the heat storage circuit (40) is provided, the maximum power consumption can be suppressed.

Further, since the circulation driving force of the secondary refrigerant is obtained by the high pressure generated by heating the secondary refrigerant in the liquid phase or the low pressure generated by cooling the secondary refrigerant in the gas phase. Unlike the case where a compressor or a mechanical pump is used as the source of the circulating driving force, the power consumption does not increase, and the use of mechanical means makes it possible to identify the cause of the failure. Therefore, the reliability of the entire apparatus can be improved.

-Modification- In the present embodiment, the primary refrigerant and the secondary refrigerant may be the same refrigerant or different refrigerants. In particular, a low-pressure refrigerant such as R134a is used for the secondary refrigerant. Thus, high-temperature heat storage can be performed.

[0071]

Second Embodiment Next, a second embodiment of the present invention will be described in detail with reference to the drawings. This embodiment is a modification of the means for obtaining the refrigerant circulation driving force in the secondary-side refrigerant circuit (30), and the other configuration and the refrigerant circulation operation are the same as those in the first embodiment. Therefore, here, only the differences from the first embodiment will be described.

As shown in FIG. 10, the primary refrigerant circuit (20) of the regenerative air conditioner (10) of the present embodiment includes a first main heat exchanger (11) and a second main heat exchanger as main heat exchangers. The heat exchanger (11 ') is connected in series. That is, the compressor (21) and the four-way switching valve
(22), a heat source side heat exchanger (23), a first expansion valve (EV-1),
The primary side (11A) of the first main heat exchanger (11) and the first solenoid valve (SV-
1), the second expansion valve (EV-2), and the second main heat exchanger (11 ').
The next side (11'A) is connected in order to form a heat source circuit. A hot gas pipe (26) is connected to the discharge side of the compressor (21), and the other end of the hot gas pipe (26) is connected to the first main heat exchanger (11).
Between the primary side (11A) and the first solenoid valve (SV-1). The hot gas pipe (26) is provided with a second solenoid valve (SV-2). One end of a branch pipe (27) is connected between the first expansion valve (EV-1) and the primary side (11A) of the first main heat exchanger (11),
The other end of the branch pipe (27) is connected to a first solenoid valve (SV-1) and a second expansion valve.
(EV-2). This branch pipe (27) has a third
An electromagnetic valve (SV-3) is provided. A suction pipe (28) that bypasses the four-way switching valve (22) is connected to the suction side of the compressor (21).

On the other hand, the driving force generating circuit (60) comprises a tank (61), a pressurizing heat exchanger (62),
A decompression heat exchanger (63) is provided. Heat exchanger for pressurization (62)
Is capable of exchanging heat with the primary side (11A) of the first main heat exchanger (11). The heat exchanger for decompression (63) is the second main heat exchanger
Heat can be exchanged with the primary side (11'A) of (11 '). In other words, the pressurizing heat exchanger (62) and the depressurizing heat exchanger (63) of the present embodiment receive heat from the primary refrigerant and generate a circulating driving force for the secondary refrigerant. This one
The heat received from the secondary-side refrigerant is used to perform indoor cooling / heating and heat storage for water in the heat storage tank. That is, the pressurizing heat exchanger (62) and the depressurizing heat exchanger (63) have the function of the secondary side (11B) of the main heat exchanger (11) in the first embodiment described above. At the time of heat storage or cooling, the decompression heat exchanger (63) receives cold heat for cold storage or cooling from the primary refrigerant, and at the time of warm heat storage or heating, the heat exchanger for pressurization.
In (62), cold heat for warm storage or heating is received from the primary refrigerant.

The gas line of the secondary circuit (30) is branched,
On the other hand, the first gas branch pipe (LG-1) is a heat exchanger for pressurization.
The second gas branch pipe (LG-2), which is the other, is connected to the upper part of (62) and to the upper part of the decompression heat exchanger (63), respectively. The branch pipes (LG-1, LG-2) of these gas lines are provided with solenoid valves (SV, SV).

The liquid line of the secondary circuit (30) is also branched, and one of the first liquid branch pipes (LL-1) is connected to the pressurizing heat exchanger (62).
The second liquid branch pipe (LL-2), which is the other, is connected to the lower part of the pressure-reducing heat exchanger (63). A solenoid valve (SV) and a one-way valve (C
V) is provided. The one-way valve (CV) of the first liquid branch pipe (LL-1) connected to the pressurizing heat exchanger (62) is a pressurizing heat exchanger (62).
One-way valve of the second liquid branch pipe (LL-2) connected to the heat exchanger for pressure reduction (63)
(CV) allows only the flow of the refrigerant toward the decompression heat exchanger (63).

The pressurizing pipe (62a) for applying the high pressure generated by the pressurizing heat exchanger (62) to the tank (61) is a first gas branch pipe (LG-
It is connected to 1) and the upper part of the tank (61). A pressure reducing pipe (63a) for applying a low pressure generated by the pressure reducing heat exchanger (63) to the tank (61) is connected to the second gas branch pipe (LG-2) and the pressure pipe (62a). . These pressurizing pipe (62a) and depressurizing pipe (63a) are provided with pressurizing and depressurizing solenoid valves (SV, SV).
Further, one end of the liquid refrigerant push-out pipe (64) connected to the tank (61) is connected to the solenoid valve (SV) and the one-way valve (C) of the first liquid branch pipe (LL-1).
V). Liquid piping of heat exchanger for decompression (63)
(63b) is connected to the second liquid branch pipe (LL-2) and the liquid refrigerant push-out pipe (64).

The upper part of the refrigerant side (42A) of the heat storage heat exchanger (42) is connected to the gas line of the secondary circuit (30) by the gas pipe (81). The lower part of the heat storage heat exchanger (42) on the refrigerant side (42A) is branched, while one (82) is a second liquid branch pipe.
(LL-2) is connected downstream of the one-way valve (CV), and the other (83) is connected between the solenoid valve (SV) and the one-way valve (CV) of the first liquid branch pipe (LL-1). doing. The first liquid connected to this second liquid branch pipe (LL-2)
The branch pipe (82) is provided with an electric valve (EV) and an electromagnetic valve (SV). The second branch pipe (83) connected to the first liquid branch pipe (LL-1) is provided with a solenoid valve (SV).

Further, the first branch pipe (82) and the secondary side circuit (3)
The liquid line of (0) is connected by a heat storage liquid pipe (84). The heat storage liquid pipe (84) is provided with an electromagnetic valve (SV).

The other circuit configuration is substantially the same as that of the above-described first embodiment, and the description is omitted.

Even in the present regenerative air conditioner (10), a cold storage operation for storing cold heat, a hot storage operation for storing hot heat, a cooling operation using heat for cooling using cold heat, and A heating operation using heat storage using heating, a normal cooling operation in which cooling is performed using the primary-side refrigerant as a heat source, and a normal heating operation in which heating is performed using the primary-side refrigerant as a heat source are performed.

-Operation- Next, the operation of the regenerative air conditioner will be described.

<Cold heat storage operation> As shown in FIG. 11, when storing cold heat, the four-way switching valve (22) is used in the primary circuit (20).
To the solid line side, and the first solenoid valve (SV-1) and each expansion valve (E
V-1, EV-2) is released. In addition, the second and third solenoid valves (SV-2, S
V-3) is closed. As a result, the primary refrigerant discharged from the compressor (21) is condensed in the heat source side heat exchanger (23) and enters a supercooled state on the primary side (11A) of the first main heat exchanger (11). After that, expansion is performed by the second expansion valve (EV-2) whose opening is adjusted, and the second main heat exchanger is expanded.
Circulation is performed on the primary side (11'A) of (11 ') to return to the compressor (21).

In the secondary circuit (30), the second gas branch pipe (LG-
2) Open each solenoid valve (SV) provided in the first liquid branch pipe (LL-1) and the heat storage liquid pipe (84), and close the solenoid valve in the second branch pipe (83). In addition, the circulation pump (44) of the water circuit (48)
Drive.

As a result, the first heat exchanger (62)
The liquid refrigerant inside is heated and evaporated by the primary side (11A) of the main heat exchanger (11), and accordingly, a high pressure is generated. on the other hand,
In the decompression heat exchanger (63), the primary side of the second main heat exchanger (11 ')
The gas refrigerant inside is cooled and condensed by (11′A), and accordingly, a low pressure is generated. Further, as in the case of Embodiment 1, the pressurizing side solenoid valve (SV) provided on the pressurizing pipe (62a) and the depressurizing side solenoid valve (SV) provided on the depressurizing pipe (63a) are The open / close state is alternately switched. In other words, when the pressurizing side solenoid valve (SV) is open, the pressurizing heat exchanger
(62) communicates with the tank (61), high pressure acts on the tank (61), and when the pressure reducing solenoid valve (SV) is open, the pressure reducing heat exchanger (72) is connected to the tank (61). ) And a low pressure acts on the tank (61).

As a result, as shown by arrows in FIG.
Due to the high pressure acting on the tank (61),
The secondary refrigerant is extruded into the liquid refrigerant extruding pipe (64). The secondary refrigerant flows through the heat storage liquid pipe (84), and is used as a heat storage heat exchanger.
It evaporates in (42), and then flows into the pressure reducing heat exchanger (63) via the gas pipe (81). In this decompression heat exchanger (63), 1
The secondary refrigerant is condensed by the latent heat of evaporation of the secondary refrigerant. The condensed refrigerant is collected in the tank (61) via the liquid pipe (63b). On the other hand, the water circulating in the water circuit (48) is cooled and iced by the secondary refrigerant evaporated in the heat storage heat exchanger (42), and collected in the heat storage tank (41).

By performing the refrigerant circulating operation and the water circulating operation as described above, the secondary refrigerant is transferred to the heat storage heat exchanger (4).
In 2), the heat storage medium circulating in the water circuit (48) is cooled to store cold heat such as ice.

<Heat-storage Cooling Operation> In the heat-storage cooling operation, as shown in FIG. 12, the primary circuit (20) is driven in the same manner as in the above-described cold-storage operation to circulate the refrigerant.

In the secondary circuit, a second gas branch pipe (LG-2),
The solenoid valves (SV) provided on the first liquid branch pipe (LL-1) and the first branch pipe (82) are opened, and the solenoid valves on the second branch pipe (83) are closed. Further, the circulating pump (44) of the water circuit (48) is driven.

As a result, the secondary liquid refrigerant pushed out from the tank (61) in the same manner as in the cold storage operation described above reaches the indoor unit (1B) via the liquid refrigerant push-out pipe (64) and reaches the indoor heat exchanger. Evaporates in (33) to cool the room air. Then, this refrigerant is partially passed through the gas pipe (81), and the heat storage heat exchanger (42).
In the above, heat exchange is performed with cold water circulating in the water circuit (48) to condense. The other refrigerant condenses by performing heat exchange with the primary-side refrigerant in the pressure-reduction heat exchanger (63). These condensed refrigerants are collected in the tank (61) where low pressure is acting.

As described above, the cooling of the room is performed by utilizing the cold heat stored in the heat storage tank (41) and the latent heat of evaporation of the primary refrigerant.

<Normal Cooling Operation> As shown in FIG.
Even when performing normal cooling operation using the secondary refrigerant as a heat source,
The primary circuit (20) is driven in the same manner as in the cold storage operation described above to circulate the refrigerant.

In the secondary circuit (30), the second gas branch pipe (LG-
2), each solenoid valve (SV) provided in the first liquid branch pipe (LL-1)
And the solenoid valve of the second branch pipe (83) is closed. Further, the circulation pump (44) of the water circuit (48) is stopped.

As a result, the secondary liquid refrigerant pushed out from the tank (61) in the same manner as in the cold heat storage operation described above reaches the indoor unit (1B) via the liquid refrigerant push-out pipe (64) and reaches the indoor heat exchanger. Evaporates in (33) to cool the room air. Thereafter, the refrigerant exchanges heat with the primary-side refrigerant in the pressure-reduction heat exchanger (63) to be condensed, and then is collected in the tank (61). That is, the secondary-side refrigerant conveys cold heat, which is latent heat of evaporation of the primary-side refrigerant, to the indoor heat exchanger (33) to cool the room.

<Heat Storage Operation> As shown in FIG. 14, when storing heat, the primary circuit (20) switches the four-way switching valve (22) to the broken line side, and the second and third solenoid valves. (SV-2, SV-3) and each expansion valve (EV-1, EV-2) are opened. Also, the first solenoid valve (SV
-1) is closed. As a result, the primary refrigerant discharged from the compressor (21) condenses on the primary side (11A) of the first main heat exchanger (11), and a part of the refrigerant is depressurized by the second expansion valve (EV-2). Then, it evaporates on the primary side (11'A) of the second main heat exchanger (11 '). The other refrigerant is depressurized by the first expansion valve (EV-1) and then evaporated by the heat source side heat exchanger (23). These evaporated primary-side refrigerants join to form a compressor (2
Perform circulation returning to 1).

In the secondary circuit, a first gas branch pipe (LG-1),
Each solenoid valve (SV) provided in the first branch pipe (82) is opened, and the solenoid valve in the second branch pipe (83) is closed. Also,
The circulation pump (44) of the water circuit (48) is driven.

As a result, the liquid-phase secondary refrigerant extruded from the tank (61) is supplied to the first heat exchanger (62) by the first heat exchanger.
The primary refrigerant on the primary side (11A) of the main heat exchanger (11) evaporates due to the latent heat of condensation, and then the first gas branch pipe (LG-1) and the gas pipe (8
1) through the heat storage heat exchanger (42)
Condensed in (42) and circulated back to the tank (61) via the first branch pipe (82). That is, the secondary-side refrigerant heats the heat storage medium of the water circuit (48) in the heat storage heat exchanger (42) and stores heat such as hot water.

<Heating operation using heat storage> As shown in FIG. 15, when the heating operation is performed by using the stored heat, the primary circuit (20) is connected to the primary circuit (20) by the above-described heat storage. The refrigerant is circulated by being driven in the same manner as during operation.

In the secondary circuit (30), the first gas branch pipe (LG-
1) Open the solenoid valves (SV) provided in the second liquid branch pipe (LL-2) and the second branch pipe (83), and drive the circulation pump (44) of the water circuit (48). I do.

As a result, a part of the liquid-phase secondary refrigerant extruded from the tank (61) passes through the first liquid branch pipe (LL-1) and enters the first main refrigerant in the pressurizing heat exchanger (62). The refrigerant on the primary side (11A) of the primary side (11A) of the heat exchanger (11) evaporates by latent heat of condensation. The other secondary-side refrigerant flows through the second branch pipe (83), and enters the heat exchanger for heat storage (42).
In, heat is taken out from the water circuit (48) and evaporated.
These evaporated secondary-side refrigerants join in the gas line, are condensed in the indoor heat exchanger (33), and then circulate back to the tank (61) via the second liquid branch pipe (LL-2). That is, the secondary refrigerant transfers the heat of the hot water to the indoor heat exchanger (33) to heat the room.

<Normal Heating Operation> As shown in FIG.
When performing normal heating operation using the secondary refrigerant as a heat source,
The secondary circuit (20) drives the primary circuit (20) in the same manner as in the above-described thermal storage operation to circulate the refrigerant.

In the secondary circuit (30), the first gas branch pipe (LG-
1), each solenoid valve (SV) provided in the second liquid branch pipe (LL-2)
And the solenoid valve of the second branch pipe (83) is closed. Further, the circulation pump (44) of the water circuit (48) is stopped.

Thus, the liquid-phase secondary refrigerant discharged from the tank (61) passes through the first liquid branch pipe (LL-1) and passes through the first heat exchanger (62) in the pressurizing heat exchanger (62). It evaporates by the latent heat of condensation of the primary-side refrigerant of 11). The evaporated secondary-side refrigerant flows through the gas line, condenses in the indoor heat exchanger (33), and then circulates back to the tank (61) via the second liquid branch pipe (LL-2). That is, the secondary-side refrigerant conveys heat, which is latent heat of condensation of the primary-side refrigerant, to the indoor heat exchanger (33) to heat the room.

In the present embodiment, the same effects as in the first embodiment can be obtained, and the practicality of the device can be improved.

[0104]

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIG. This embodiment is a modification of the first embodiment described above, in which a means for giving heat to the heat exchanger for pressurization (62) and for giving heat to the heat exchanger for decompression (63) is improved. It is.

As shown in FIG. 17, in the present embodiment, a heating means (71) such as a heater is disposed adjacent to the heat exchanger for pressurization (62), and is disposed adjacent to the heat exchanger for decompression (63). A cooling means (72) such as a Peltier element is provided. That is, the heating of the pressurizing heat exchanger (62) and the cooling of the depressurizing heat exchanger (63) are performed by independent means. Other configurations are the same as those of the above-described first embodiment, and a description thereof will not be repeated. Further, a Peltier element may be used as a means for heating the pressurizing heat exchanger (62).

In this embodiment, when the secondary refrigerant is circulated, heat is applied to the pressurizing heat exchanger (62) by the heating means (71), and the liquid in the pressurizing heat exchanger (62) is supplied. A high pressure is generated by evaporating the refrigerant. On the other hand, the pressure reducing heat exchanger (63) is cooled by the cooling means (72), and the gas refrigerant in the pressure reducing heat exchanger (63) is condensed to generate a low pressure. In this state,
A pressure-side solenoid valve (SV) provided in the pressure circuit (62a),
By alternately switching the open / close state with the pressure reducing solenoid valve (SV) provided in the pressure reducing circuit (63a), the state in which high pressure acts in the tank (61) and the state in which low pressure acts alternately. By switching, the secondary refrigerant is pushed out from the tank (61) and the secondary refrigerant is sucked into the tank (61), and the secondary refrigerant circulates in the secondary circuit (30). Will be. The refrigerant circulating operation in each operation is the same as that in the first embodiment described above, and a description thereof will be omitted. (Modifications of Primary-Side Circuit and Secondary-Side Circuit) The following embodiments are modifications of the primary-side circuit (20) and the secondary-side circuit (30), and include a driving force generation circuit (60). Is similar to that of the first embodiment. Accordingly, in the following circuit, the circuit configuration of the driving force generation circuit (60) is omitted, and only the circuit configuration of the primary side circuit and the secondary side circuit will be described.

[0107]

Embodiment 4 Hereinafter, Embodiment 4 of the present invention will be described in detail.

As shown in FIG. 18, the configuration of the primary circuit (20) of the regenerative air conditioner (10) according to this embodiment is the same as that of the first embodiment.

The secondary side circuit (30) includes a driving force generation unit (1D), a four-way switching valve (32), a motor-operated valve (EV), and an indoor heat exchanger which is a use side heat exchanger as described above. (33) and main heat exchanger (11)
A main passage (3a) in which the secondary side of the motor and the electric valve (EV) are connected in order, the secondary side refrigerant as the secondary side heat medium is charged, and the four-way switching valve (32) is switched. The circulation direction of the secondary refrigerant is reversible between the cooling cycle and the heating cycle.

As a feature of the present invention, the heat storage circuit (40) is connected to the secondary circuit (30), and is configured to store the heat of the primary refrigerant through the secondary refrigerant. . The heat storage circuit (40) is a heat storage tank (41) in which a heat storage medium such as water is stored.
A heat storage heat exchanger (42) is housed in the heat storage tank (41) to form a static heat storage circuit, and is configured to be an outer melting type for melting cold ice from outside.

One end of the heat storage heat exchanger (42) is connected to an electric valve (E
V) is connected to the liquid line between the four-way switching valve (32) in the secondary circuit (30) and the electric valve (EV) on the indoor side, and the other end is connected to the secondary circuit (30) The heat storage passage (4a) connected to the gas line between the main heat exchanger (11) and the indoor heat exchanger (33)
The heat storage heat exchanger (42) is configured to store cold heat such as ice and warm heat such as hot water in the heat storage tank (41).

The heat storage circuit (40) includes a heat storage medium circulation passage (4b), and the circulation passage (4b) has a heat storage tank (4) at both ends.
1), and the heat storage side of the take-out heat exchanger (43) and the circulation pump (44) are connected in order.
An extraction passage is provided on the secondary side of the extraction heat exchanger (43).
(4c) is connected, and one end of the take-out passage (4c) is connected to the electric valve (E
V) is connected to the liquid line between the four-way switching valve (32) in the secondary circuit (30) and the electric valve (EV) on the outdoor side, and the other end is connected to the secondary circuit (30) Is connected to a gas line between the main heat exchanger (11) and the indoor heat exchanger (33). The removal heat exchanger (43) is configured to exchange heat between the heat storage medium and the secondary refrigerant, and the secondary refrigerant is supplied to the heat storage tank.
It is configured to take out the heat storage of (41).

-Operating operation- Next, the operating operation of the regenerative air conditioner (10) will be described.

<Cold heat storage operation> As shown in FIG. 19, when cold heat is stored, the primary circuit (20) switches the four-way switching valve (22) to the solid line side and discharges from the compressor (21). The condensed primary refrigerant condenses in the heat source side heat exchanger (23) and expands in the electric valve (EV),
The circulation which evaporates in the main heat exchanger (11) and returns to the compressor (21) is performed.

The secondary circuit (30) switches the four-way switching valve (32) to the solid line side, and drives the electric valve (EV) on the indoor side and the take-out passage (4c).
With the motorized valve (EV) closed, drive unit (1
D) drive. The liquid-phase secondary refrigerant discharged from the driving force generation unit (1D) flows to the heat storage heat exchanger (42) and evaporates in the heat storage heat exchanger (42), and then, the secondary refrigerant Circulates through the main heat exchanger (11), condenses with the latent heat of evaporation of the primary refrigerant, and returns to the driving force generating unit (1D). That is, the secondary-side refrigerant cools the heat storage medium in the heat storage tank (41) by the heat storage heat exchanger (42) and stores cold heat such as ice.

<Cooling Operation Using Heat Storage> As shown in FIG. 20, when the cooling operation is performed using the stored cold heat, the primary circuit (20) is stopped.

The secondary side circuit (30) switches the four-way switching valve (32) to the solid line side and closes the outdoor electric valve (EV) and the electric valve (EV) of the heat storage passage (4a) in a closed state. , Driving force generation unit (1D)
And the circulation pump (44) is driven. By driving the circulation pump (44), the heat storage medium is stored in the heat storage tank (41) and the take-out heat exchanger (43).
Circulates between On the other hand, the driving force generation unit (1D)
The liquid-phase secondary refrigerant discharged from the refrigerant flows into the indoor heat exchanger (33) and evaporates in the indoor heat exchanger (33), and thereafter, the secondary refrigerant is removed from the removal heat exchanger (43). ), Condenses with the cold heat of the heat storage medium, and returns to the driving force generation unit (1D). That is, the secondary-side refrigerant conveys the cold heat of the heat storage medium to the indoor heat exchanger (33) to cool the room.

<Normal Cooling Operation> As shown in FIG.
When performing normal cooling operation using the secondary refrigerant as a heat source, the primary circuit (20) switches the four-way switching valve (22) to the solid line side, and the primary refrigerant discharged from the compressor (21) is heated by the heat source. Side heat exchanger (23)
Circulates and expands with the electric valve (EV), evaporates in the main heat exchanger (11) and returns to the compressor (21).

The secondary circuit (30) switches the four-way switching valve (32) to the solid line side and closes the electric valve (EV) in the heat storage passage (4a) and the electric valve (EV) in the extraction passage (4c). In this state, the driving force generation unit (1D) is driven. The liquid-phase secondary refrigerant discharged from the driving force generation unit (1D) flows into the indoor heat exchanger (33) and evaporates in the indoor heat exchanger (33).
The circulation is performed by flowing to the main heat exchanger (11), condensing by the latent heat of vaporization of the primary-side refrigerant, and returning to the driving force generation unit (1D). That is,
The secondary-side refrigerant conveys cold heat, which is latent heat of evaporation of the primary-side refrigerant, to the indoor heat exchanger (33) to cool the room.

<Heat Heat Storage Operation> As shown in FIG. 22, when storing heat, the primary circuit (20) switches the four-way switching valve (22) to the broken line side and discharges from the compressor (21). The primary-side refrigerant condenses in the main heat exchanger (11), expands in the electric valve (EV), evaporates in the heat-source-side heat exchanger (23), and returns to the compressor (21).

The secondary side circuit (30) switches the four-way switching valve (32) to the broken line side, and drives the indoor electric valve (EV) and the take-out passage (4c).
With the motorized valve (EV) closed, drive unit (1
D) drive. The liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) flows into the main heat exchanger (11) and evaporates with the latent heat of condensation of the primary refrigerant. The heat is transferred to the heat exchanger (42), condensed in the heat exchanger (42), and returned to the driving force generating unit (1D). That is, the secondary-side refrigerant heats the heat storage medium of the heat storage tank (41) by the heat storage heat exchanger (42) and stores heat such as hot water.

<Heating Operation Using Heat Storage> As shown in FIG. 23, when the heating operation is performed using the stored heat, the primary circuit (20) is stopped.

The secondary circuit (30) switches the four-way switching valve (32) to the broken line side and closes the outdoor electric valve (EV) and the electric valve (EV) in the heat storage passage (4a). , Driving force generation unit (1D)
And the circulation pump (44) is driven. By driving the circulation pump (44), the heat storage medium is stored in the heat storage tank (41) and the take-out heat exchanger (43).
Circulates between On the other hand, the driving force generation unit (1D)
The secondary refrigerant in the liquid phase discharged from the
3) and evaporates with the heat of the heat storage medium. Thereafter, the secondary-side refrigerant flows into the indoor heat exchanger (33) and flows into the indoor heat exchanger (3).
Circulation is performed in 3) to return to the driving force generation unit (1D). That is, the secondary-side refrigerant conveys the heat of the heat storage medium to the indoor heat exchanger (33) to heat the room.

<Normal Heating Operation> As shown in FIG.
When performing a normal heating operation using the secondary refrigerant as a heat source, the primary circuit (20) switches the four-way switching valve (22) to the broken line side, and the primary refrigerant discharged from the compressor (21) is mainly used. Condensed in the heat exchanger (11), expanded by the electric valve (EV), evaporated in the heat source side heat exchanger (23), and returned to the compressor (21).

The secondary circuit (30) switches the four-way switching valve (32) to the broken line side and closes the electric valve (EV) in the heat storage passage (4a) and the electric valve (EV) in the extraction passage (4c). In this state, the driving force generation unit (1D) is driven. The liquid-phase secondary refrigerant discharged from the driving force generation unit (1D) flows into the main heat exchanger (11) and
Evaporates with the latent heat of condensation of the secondary refrigerant, and then the indoor heat exchanger (3
The circulation is performed to flow to 3), condensed in the indoor heat exchanger (33), and returned to the driving force generating unit (1D). That is, the secondary refrigerant transfers the heat, which is the latent heat of condensation of the primary refrigerant, to the indoor heat exchanger (3).
Transport to 3) to heat the room.

<Other Operations> In the present embodiment, the cooling operation using heat storage and the normal cooling operation are operated independently of each other. However, the combined operation in which the cooling operation using heat storage and the normal cooling operation are performed simultaneously is performed. You may. In other words, the secondary refrigerant evaporated in the indoor heat exchanger (33) is
(43) and the main heat exchanger (11), which may be separated and condensed, then merged and returned to the driving force generation unit (1D).

Further, in this embodiment, the heating operation using the heat storage and the normal heating operation are operated independently of each other. However, a combined operation of simultaneously performing the heating operation using the heat storage and the normal heating operation may be performed. . That is, the transport means (31)
The refrigerant on the secondary side is separated into the heat exchanger for extraction (43) and the main heat exchanger (11) and evaporates, and then the secondary refrigerant merges and condenses in the indoor heat exchanger (33). The circulation returning to the conveying means (31) may be performed.

-Effects of Embodiment- As described above, also in the fourth embodiment, similarly to the first embodiment, the heat storage circuit (40) is connected to the secondary side circuit (30), and the primary side is connected. Since the heat of the circuit (20) is stored through the secondary refrigerant, the primary circuit (20) can be constituted by one independent circuit, and a plurality of primary circuits (20) The heat source capacity can be arbitrarily set by connecting. At the same time, the heat storage capacity can be arbitrarily set by connecting a plurality of heat storage circuits (40).

As a result, a system in which various heat source capacities and heat storage capacities are combined can be constructed, and the degree of freedom of combination can be improved.

Further, since the primary side circuit (20) is only a heat source circuit, the lubricating oil can be easily managed, so that the operation control can be simplified.

The primary circuit (20) and the secondary circuit (3
0), the existing piping can be reused.

Since the heat storage circuit (40) is provided, the maximum power consumption can be suppressed.

[0133]

[Fifth Embodiment] In this embodiment, as shown in FIG. 25, the heat storage circuit (40) is of the static type and the outer melting type as in the fourth embodiment. An auxiliary circuit (50) for performing the above is provided.

The auxiliary circuit (50) includes a compressor (51), an auxiliary circuit side of an auxiliary heat exchanger (52), an electric valve (EV), and an auxiliary circuit side of an auxiliary heat source heat exchanger (53). The auxiliary refrigerant of the auxiliary circuit (50) is condensed in the auxiliary use heat exchanger (52) while being evaporated in the auxiliary heat source heat exchanger (53). It is configured.

The auxiliary heat source heat exchanger (53) is configured such that the heat storage side is connected to the circulation passage (4b), the heat storage medium and the auxiliary refrigerant exchange heat, and the auxiliary refrigerant evaporates by the heat of the heat storage medium. ing. An outlet passage (4d) is connected to the auxiliary heat exchanger (52), and one end of the outlet passage (4d) is connected to the four-way switching valve (32) in the secondary circuit (30) and the outdoor side. The other end is connected to the liquid line between the electric valve (EV) and the other end is connected to the indoor heat exchanger (33) and the main heat exchanger (11) in the secondary circuit (30).
Connected to the gas line between

The auxiliary use heat exchanger (52) is
The secondary refrigerant and the auxiliary refrigerant are configured to exchange heat. Other configurations are the same as in the fourth embodiment.

-Operation- Next, a description will be given of a heating operation using heat storage in the regenerative air conditioner (10). This operation is performed when the heating operation is performed using the heat stored in the heat storage tank (41). And
As shown in FIG. 25, the primary circuit (20) is stopped.

The secondary circuit (30) switches the four-way switching valve (32) to the solid line side, and drives the outdoor electric valve (EV), the electric valve (EV) of the heat storage passage (4a), and the extraction passage (4c). In the state in which the electric valve (EV) is closed, the driving force generation unit (1D) and the circulation pump (44) are driven, and the auxiliary circuit (50) is operated. The circulation pump
By driving (44), the heat storage medium circulates between the heat storage tank (41), the auxiliary heat source heat exchanger (53), and the removal heat exchanger (43), while the auxiliary refrigerant of the auxiliary circuit (50) is Circulation discharged from the compressor (51), condensed in the auxiliary heat exchanger (52), depressurized by the electric valve (EV), evaporated in the auxiliary heat source heat exchanger (53) and returned to the compressor (51) I do.

Further, the secondary refrigerant in the liquid phase discharged from the driving force generating unit (1D) flows through the discharge passage (4d) and evaporates in the auxiliary use heat exchanger (52) by the latent heat of condensation of the auxiliary refrigerant. Thereafter, the secondary refrigerant flows into the indoor heat exchanger (33), condenses in the indoor heat exchanger (33), and circulates back to the driving force generating unit (1D). That is, the secondary-side refrigerant conveys the heat of the heat storage medium to the indoor heat exchanger (33) via the auxiliary refrigerant to heat the room.

The other operations such as the cold storage operation are the same as those of the fourth embodiment. At this time, the motor-operated valve (EV) of the discharge passage (4d) is closed.

-Effects of Embodiment- As described above, according to the fifth embodiment, since the auxiliary circuit (50) for extracting heat is provided, a low-pressure refrigerant or the like is used as the secondary refrigerant. In addition, the heating operation using the heat storage can be performed by reliably using the heat stored in the heat storage tank (41). Other effects are the same as those of the fourth embodiment.

[0142]

[Embodiment 6] In this embodiment, as shown in FIG. 26, the heat storage circuit (40) is of the static type and the outer melting type as in the case of the embodiment 4, Instead of the circuit (50), an auxiliary passage (4e) for performing a heating operation using heat storage is provided.

The auxiliary passage (4e) is connected to the auxiliary passage side of the auxiliary heat exchanger (12) and has one end connected to the gas side of the discharge passage (4c) via a one-way valve (CV). On the other hand, the other end is connected between the four-way switching valve (32) in the secondary circuit (30) and the electrically operated valve (EV) on the indoor side. The above auxiliary heat exchanger
A bypass path (2b) is connected to the primary side of (12), and one end of the bypass path (2b) is connected to a primary circuit (20) via an electric valve (EV).
Is connected between the main heat exchanger (11) and the motor-operated valve (EV), and the other end is connected to the suction side of the compressor (21) in the primary circuit (20). And the above-mentioned auxiliary heat exchanger (12)
The primary-side refrigerant and the secondary-side refrigerant are configured to exchange heat. In addition, a one-way valve is provided on the gas side of the bypass passage (2b).
(CV) is provided. Other configurations are the same as in the fourth embodiment.

-Operation- Next, a description will be given of a heating operation using heat storage in the regenerative air conditioner (10). This operation is performed when the heating operation is performed using the heat stored in the heat storage tank (41). And
As shown in FIG. 26, the primary circuit (20) includes a four-way switching valve (2
2) is switched to the solid line side, and the electric valve (EV) in the main passage (2a) is closed. In this state, the primary-side refrigerant discharged from the compressor (21) is condensed in the main heat exchanger (11) and expanded by the electric valve (EV) in the bypass passage (2b), so that the auxiliary heat exchanger (12) A circulation is carried out to evaporate and return to the compressor (21).

The secondary side circuit (30) switches the four-way switching valve (32) to the solid line side and closes the electric power valve (EV) of the heat storage passage (4a), while the driving force generating unit (1D) Drive the circulation pump (44). By driving the circulation pump (44), the heat storage medium circulates between the heat storage tank (41) and the removal heat exchanger (43). On the other hand, the liquid phase 2 discharged from the driving force generation unit (1D)
The secondary refrigerant flows through the removal passage (4c) and the main heat exchanger (11). The secondary-side refrigerant flowing through the take-out passage (4c) exchanges heat with the heat storage medium in the take-out heat exchanger (43) to evaporate, and then flows through the auxiliary passage (4e) to become the auxiliary heat exchanger (12). Exchanges heat with the primary-side refrigerant and condenses into the driving force generation unit (1
Return to D).

Further, the secondary refrigerant flowing into the main heat exchanger (11) exchanges heat with the primary refrigerant and evaporates, and then flows into the indoor heat exchanger (33) to exchange heat with the indoor heat exchanger (33). The circulation is performed by condensing in the vessel (33) and returning to the driving force generation unit (1D). That is, the secondary refrigerant transfers the heat of the heat storage medium to the indoor heat exchanger (33) via the primary refrigerant to heat the room.

Therefore, the transfer of heat in the above-described heating operation utilizing heat storage will be described with reference to a Mollier diagram. As shown in FIG. 27, first, the primary-side refrigerant is transferred from point A to point B by the compressor (21). Pressurized, condensed in main heat exchanger (11), and changed phase to point C,
The pressure is reduced to the point D by the electric valve (EV), evaporated by the auxiliary heat exchanger (12), the phase is changed to the point A, and the flow returns to the compressor (21).

On the other hand, the secondary refrigerant in the liquid phase is pressurized from the point a to the point b by the driving force generating unit (1D), and is taken out from the outlet passage (4c).
The secondary-side refrigerant that has flowed into the discharge passage (4c)
The pressure is reduced by V) to drop to the point c. The secondary-side refrigerant exchanges heat with the heat-storing medium W that has warmed in the take-out heat exchanger (43), evaporates, and changes phase to point d. The evaporated secondary-side refrigerant flows into the auxiliary heat exchanger (12), exchanges heat with the primary-side refrigerant, condenses with the latent heat of vaporization (D to A) of the primary-side refrigerant, and changes phase to point a. To return to the driving force generation unit (1D).

A part of the secondary refrigerant at the point b flows into the main heat exchanger (11), and exchanges heat with the primary refrigerant in the main heat exchanger (11). It evaporates due to the latent heat of condensation (B to C) of the side refrigerant, and changes phase to point e. The evaporated secondary-side refrigerant flows into the indoor heat exchanger (33), exchanges heat with room air to heat the room air, condenses, changes phase to point f, and is driven in the state at point a. Return to the force generation unit (1D). The other cold storage operation is the same as that of the fourth embodiment, but the combined heating operation of performing the normal heating operation while using the stored heat is not performed.

-Effects of Embodiment- As described above, according to the sixth embodiment, since the auxiliary passage (4e) for taking out heat is provided, the heat is stored using the primary circuit (20). Since the heating operation using heat storage can be performed by reliably using the stored heat of the tank (41),
There is no need to provide an auxiliary circuit (50) including a compressor (51) as in the fifth embodiment, and the circuit configuration can be simplified. Other effects are the same as those of the fourth embodiment.

[0151]

Seventh Embodiment In this embodiment, as shown in FIG. 28, the circulation passage (4b) in the fourth embodiment is omitted, and the heat storage heat exchanger (42) performs the heat storage and the extraction of the heat storage. The heat storage circuit (40) is of a static type, and is formed of an inner melting type for melting cold ice from the inside.

That is, in the present embodiment, the extraction passage (4c) is connected to the heat storage passage (4a) of the fourth embodiment. The take-out passage (4c) includes an electric valve (EV), one end of which is connected between the heat storage heat exchanger (42) and the electric valve (EV) in the heat storage passage (4a), and the other end of which is secondary. It is connected between the electric valve (EV) and the four-way switching valve (32) in the side circuit (30). Other configurations are the same as in the fourth embodiment.

-Operating operation- Next, the operating operation of the regenerative air conditioner (10) will be described. The cooling operation using the heat storage and the heating operation using the heat storage are different from those of the fourth embodiment. Are the same, only the operation using the heat storage will be described. In the cold storage operation, the electric valve (EV) of the discharge passage (4c) is closed.

<Cooling Operation Using Heat Storage> When performing cooling operation using the stored cold heat, the primary circuit (20) is stopped while the secondary circuit (30) is operated as shown in FIG. The four-way switching valve (32) is switched to the broken line side, and the driving force generation unit (1D) is driven in a state where the electric valve (EV) on the outdoor side and the electric valve (EV) in the heat storage passage (4a) are closed.

As shown by the solid arrow in FIG. 28, the liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) is:
After flowing into the indoor heat exchanger (33) and evaporating in the indoor heat exchanger (33), the secondary refrigerant then flows through the heat storage passage (4a) and passes through the heat storage heat exchanger (42). The water is condensed by cold heat, flows through the discharge passage (4c), and returns to the driving force generating unit (1D). That is, the secondary-side refrigerant conveys the cold heat of the heat storage medium to the indoor heat exchanger (33) to cool the room.

<Heat Storage Utilizing Heating Operation> When performing the heating operation using the stored heat, the primary circuit (20) is stopped, and the secondary circuit (30) is operated as shown in FIG. The four-way switching valve (32) is switched to the solid line side, and the driving force generating unit (1D) is driven in a state where the electric valve (EV) on the outdoor side and the electric valve (EV) in the heat storage passage (4a) are closed.

As shown by a chain line arrow in FIG. 28, the liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) is:
After flowing through the heat storage passage (4a) from the removal passage (4c) and evaporating by the heat of the heat storage medium in the heat storage heat exchanger (42), the secondary refrigerant flows into the indoor heat exchanger (33) and Indoor heat exchanger (3
Circulation is performed in 3) to return to the driving force generation unit (1D). That is, the secondary-side refrigerant conveys the heat of the heat storage medium to the indoor heat exchanger (33) to heat the room.

-Effects of Embodiment- As described above, according to the seventh embodiment, the heat exchanger for heat storage is provided.
Since the heat storage and the extraction of the heat storage are performed in (42), it is not necessary to provide the extraction heat exchanger (43) and the circulation pump (44) as in the fourth embodiment, thereby simplifying the circuit configuration. Can be achieved. Other effects are the same as those of the fourth embodiment.

[0159]

Eighth Embodiment In this embodiment, as shown in FIG. 29, as in the seventh embodiment, the heat storage circuit (40) is of the static type and the inner melting type, but is similar to the fifth embodiment. A simple auxiliary circuit (50) is provided.

That is, in this embodiment, the take-out passage (4c) is provided as in the seventh embodiment, and the circulation pump (44)
Is connected to the heat storage tank (41).
On the other hand, in the auxiliary circuit (50), the compressor (51), the auxiliary use heat exchanger (52), the motor-operated valve (EV), and the auxiliary heat source heat exchanger (53) are sequentially connected in the same manner as in the fifth embodiment. The auxiliary heat source heat exchanger (53) is connected to the circulation passage (4b), and the auxiliary utilization heat exchanger (52) is connected to the extraction passage (4d). And
The use passage (4d) includes a motor-operated valve (EV) similarly to Embodiment 5, and has one end connected to the four-way switching valve (32) in the secondary circuit (30) and the outdoor motor-operated valve (EV). ), And the other end is connected to the indoor heat exchanger (3) in the secondary circuit (30).
It is connected to a gas line between 3) and the main heat exchanger (11). Other configurations are the same as those of the seventh embodiment.

-Operation- Next, a description will be given of a heating operation using heat storage in the regenerative air conditioner (10). This operation is performed when the heating operation is performed using the heat stored in the heat storage tank (41). And
As shown in FIG. 29, the primary circuit (20) is stopped.

The secondary circuit (30) switches the four-way switching valve (32) to the solid line side, and drives the outdoor electric valve (EV), the electric valve (EV) of the heat storage passage (4a) and the extraction passage (4c). In the state in which the electric valve (EV) is closed, the driving force generation unit (1D) and the circulation pump (44) are driven, and the auxiliary circuit (50) is operated. The circulation pump
By driving (44), the heat storage medium circulates between the heat storage tank (41) and the auxiliary heat source heat exchanger (53), while the auxiliary refrigerant in the auxiliary circuit (50) is discharged from the compressor (51). Condensed in the auxiliary heat exchanger (52), decompressed by the electric valve (EV), evaporated in the auxiliary heat source heat exchanger (53), and returned to the compressor (51).

Further, the liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) flows through the use passage (4d) and evaporates in the auxiliary use heat exchanger (52) by the latent heat of condensation of the auxiliary refrigerant. Thereafter, the secondary refrigerant flows into the indoor heat exchanger (33), condenses in the indoor heat exchanger (33), and circulates back to the driving force generating unit (1D). That is, the secondary-side refrigerant conveys the heat of the heat storage medium to the indoor heat exchanger (33) via the auxiliary refrigerant to heat the room.

The other operations such as the cold storage operation are the same as those of the seventh embodiment. At this time, the motor-operated valve (EV) of the discharge passage (4d) is closed.

-Effects of Embodiment- As described above, according to the eighth embodiment, since the auxiliary circuit (50) for extracting heat is provided, a low-pressure refrigerant or the like is used as the secondary refrigerant. In addition, the heating operation using the heat storage can be performed by reliably using the heat stored in the heat storage tank (41). Other effects are the same as those of the seventh embodiment.

[0166]

[Embodiment 9] In this embodiment, as shown in FIG. 30, the heat storage circuit (40) is of the static type and the inner melting type, as in the case of the embodiment 8, but is supplementary to the embodiment 8. The heat source heat exchanger (53) is arranged inside the heat storage tank (41).

That is, since the auxiliary heat source heat exchanger (53) is installed inside the heat storage tank (41), the auxiliary circuit (50) of the present embodiment has the heat storage tank (41) stored in the heat storage tank (41). The auxiliary refrigerant is configured to directly exchange heat with the medium. Therefore, in the present embodiment, the circulation passage as in the eighth embodiment is used.
(4b) is omitted.

-Operating Operation- As shown in FIG. 30, the heating operation using heat storage according to the present embodiment is the same as that of the eighth embodiment, but the auxiliary circuit (50) is used.
The auxiliary refrigerant is discharged from the compressor (51), condensed in the auxiliary heat exchanger (52), decompressed by the electric valve (EV), and stored in the heat storage tank (41) by the auxiliary heat source heat exchanger (53). The heat is exchanged with the heat storage medium to evaporate and return to the compressor (51).

The liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) flows through the use passage (4d), evaporates in the auxiliary use heat exchanger (52) by the latent heat of condensation of the auxiliary refrigerant, and thereafter, The secondary-side refrigerant flows into the indoor heat exchanger (33) and
And circulates back to the driving force generating unit (1D).
That is, the secondary-side refrigerant conveys the heat of the heat storage medium to the indoor heat exchanger (33) via the auxiliary refrigerant to heat the room.

The other operations such as the cold storage operation are the same as those in the seventh embodiment. At this time, the motor-operated valve (EV) in the discharge passage (4d) is closed.

-Effects of Embodiment- As described above, according to the ninth embodiment, the auxiliary heat source heat exchanger (53) of the auxiliary circuit (50) is arranged in the heat storage tank (41). Since the circulation passage (4b) of the eighth embodiment can be omitted, the circuit configuration can be simplified. Other effects are the same as those of the seventh embodiment.

[0172]

[Embodiment 10] In this embodiment, as shown in FIG. 31, the heat storage circuit (40) is of the static type and the inside melting type as in the case of the embodiment 7;
An auxiliary passage (4e) similar to that described above is provided.

That is, in this embodiment, the take-out passage (4c) is provided and the circulating pump (44) is provided as in the seventh embodiment.
A circulation passage (4b) having a heat exchanger (43) for removal is connected to the heat storage tank (41). The removal heat exchanger (43)
Unlike the take-out heat exchanger (43) of the fourth embodiment, the take-out heat exchanger (43) is configured to take out only the heat of the heat storage medium.

On the other hand, the auxiliary passage (4e) is provided between the motor-operated valve (EV) and the auxiliary passage side of the take-out heat exchanger (43) and the auxiliary heat exchanger (12).
The auxiliary passage side is connected in order, and one end has a four-way switching valve (32) in the secondary side circuit (30) and an outdoor electric valve (EV)
The other end is connected to the liquid line between
Is connected to a liquid line between the four-way switching valve (32) and the indoor electric valve (EV).

A bypass path (2b) is connected to the primary side of the auxiliary heat exchanger (12), and one end of the bypass path (2b) is connected to a primary circuit (20) via an electric valve (EV). Main heat exchanger at (11)
Is connected between the motor and the electric valve (EV), and the other end is the primary side circuit (20)
At the suction side of the compressor (21). The auxiliary heat exchanger (12) is configured to exchange heat between the primary refrigerant and the secondary refrigerant. Other configurations are the same as those of the seventh embodiment.

-Operation- Next, a description will be given of a heating operation using heat storage in the regenerative air conditioner (10). This operation is performed when the heating operation is performed using the heat stored in the heat storage tank (41). And
As shown in FIG. 31, the primary circuit (20) includes a four-way switching valve (2
2) is switched to the solid line side, and the electric valve (EV) in the main passage (2a) is closed. In this state, the primary-side refrigerant discharged from the compressor (21) is condensed in the main heat exchanger (11) and expanded by the electric valve (EV) in the bypass passage (2b), so that the auxiliary heat exchanger (12) A circulation is carried out to evaporate and return to the compressor (21).

The secondary-side circuit (30) switches the four-way switching valve (32) to the solid line side and closes the motor-operated valve (EV) of the heat storage passage (4a) while the driving force generating unit (1D) Drive the circulation pump (44). By driving the circulation pump (44), the heat storage medium circulates between the heat storage tank (41) and the removal heat exchanger (43). On the other hand, the liquid phase 2 discharged from the driving force generation unit (1D)
The secondary refrigerant flows through the auxiliary passage (4e) and the main heat exchanger.
Flow to (11). The secondary refrigerant flowing through the auxiliary passage (4e) is:
The heat is exchanged with the heat storage medium in the removal heat exchanger (43) to evaporate,
Then, it flows to the auxiliary heat exchanger (12) and the auxiliary heat exchanger (12)
Exchanges heat with the primary-side refrigerant and condenses into a driving force generation unit
Return to (1D).

The secondary refrigerant flowing into the main heat exchanger (11) exchanges heat with the primary refrigerant and evaporates, and then flows into the indoor heat exchanger (33) to exchange heat with the indoor heat exchanger (33). The circulation is performed by condensing in the vessel (33) and returning to the driving force generation unit (1D). That is, the secondary refrigerant transfers the heat of the heat storage medium to the indoor heat exchanger (33) via the primary refrigerant to heat the room. Other cold storage operation and the like are the same as those in the seventh embodiment, and the secondary-side refrigerant circulates in the heat storage heat exchanger (42) during the heat storage cooling operation.

-Effects of Embodiment- As described above, according to the tenth embodiment, since the auxiliary passage (4e) for taking out heat is provided, heat is stored using the primary side circuit (20). Since the heating operation using the heat storage can be performed by reliably using the heat stored in the tank (41), the auxiliary circuit (5) including the compressor (51) as in the eighth embodiment can be used.
0) need not be provided, and the circuit configuration can be simplified. Other effects are the same as those of the seventh embodiment.

[0180]

Embodiment 11 This embodiment is different from Embodiments 4 to 10 as shown in FIG.
The heat storage tank (41) of (40) is of a dynamic type arranged outside and is provided with a preheat heat exchanger (45) at the time of cold storage operation.

First, similarly to the fourth embodiment, the primary circuit (20) includes a compressor (21), a four-way switching valve (22), and a heat source side heat exchanger (2).
3), a motor-operated valve (EV) and a main heat exchanger (11) are sequentially connected, and a main passage (2a) is provided.The heat source side heat exchanger (23)
And a liquid line between the main heat exchanger (11) and the one-way valve (CV), the receiver (24), the on-off valve (SV), the motor-operated valve (EV), and the one-way valve (CV) are connected in order, The liquid line of the main passage (2a) is configured to allow only the flow from the heat source side heat exchanger (23) to the main heat exchanger (11).

The main passage (2) of the primary side circuit (20)
a) is connected to a first passage (2c) and a second passage (2d) which are provided with a one-way valve (CV) and allow only one-way flow, and are connected to a bypass passage (2b). I have. The first passage (2c)
Has one end connected between the one-way valve (CV) and the main heat exchanger (11) and the other end connected between the one-way valve (CV) and the receiver (24). ) Is allowed to flow only to the receiver (24). The second passage (2d)
Has one end connected between the electric valve (EV) and the one-way valve (CV) and the other end connected between the heat source side heat exchanger (23) and the one-way valve (CV), and It is configured to allow only the flow from to the heat source side heat exchanger (23).

The bypass path (2b) is connected to the motor-operated valve (EV), the primary side of the auxiliary heat exchanger (12), the on-off valve (SV), and the one-way valve (CV) in order. The other end is connected between the receiver (24) and the on-off valve (SV), and the other end is connected between the one-way valve (CV) and the motor-operated valve (EV). From the receiver (24) to the main heat exchanger (11) It is configured to allow only outbound distribution.

On the other hand, a heat storage circuit which is one of the features of the present invention
(40) includes a heat storage tank (41), and the heat storage tank (41) includes a circulation passage.
(4b) is connected. The circulation passage (4b) is a circulation pump
(44) and heat storage side of preheat heat exchanger (45) and heat exchanger for heat storage (42)
Are connected in order and the heat storage medium circulates.

A heat storage passage (4a) is connected to the secondary side of the heat storage heat exchanger (42), while an auxiliary passage (4e) is connected to the secondary side of the preheat heat exchanger (45). ing. One end of the heat storage passage (4a) is connected to a gas line between the main heat exchanger (11) and the indoor heat exchanger (33) in the secondary circuit (30), and the other end is connected to an electric valve (EV ) Through the four-way switching valve (3) in the secondary circuit (30).
It is connected to the liquid line between 2) and the indoor electric valve (EV). An outlet passage (4c) is connected between the heat storage heat exchanger (42) of the heat storage passage (4a) and the electric valve (EV), and the outlet passage (4c) is connected to the electric valve (EV). Is connected to a liquid line between the electric valve (EV) on the outdoor side and the four-way switching valve (32) in the secondary circuit (30).

The auxiliary passage (4e) is configured such that the electric valve (EV), the secondary side of the preheating heat exchanger (45) and the secondary side of the auxiliary heat exchanger (12) are connected in order. . One end of the auxiliary passage (4e) is connected to a liquid line between the outdoor electric valve (EV) and the four-way switching valve (32) in the secondary circuit (30), and the other end is connected to the secondary line. Four-way switching valve (32) in side circuit (30) and electric valve (EV) on indoor side
Between the auxiliary heat exchanger (12)
The secondary-side refrigerant and the secondary-side refrigerant are configured to exchange heat. Other configurations are the same as in the fourth embodiment.

-Operating operation- Next, the operating operation of the regenerative air conditioner (10) will be described.

<Pull-down operation> As shown in FIG.
When cooling the heat storage medium rapidly, the primary circuit (20) switches the four-way switching valve (22) to the solid line side, and the primary refrigerant discharged from the compressor (21) is cooled by the heat source side heat exchanger ( Motorized valve condensed in 23)
The circulation is performed by expanding in (EV), evaporating in the main heat exchanger (11), and returning to the compressor (21).

The secondary circuit (30) switches the four-way switching valve (32) to the broken line side, and drives the indoor side electric valve (EV), the electric valve (EV) of the auxiliary passage (4e), and the extraction passage (4c). ), The driving force generating unit (1D) and the circulating pump (44) are driven with the electric valve (EV) closed. By driving the circulation pump (44), the heat storage medium circulates between the heat storage tank (41) and the heat storage heat exchanger (42). on the other hand,
The liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) flows through the heat storage passage (4a) and evaporates in the heat storage heat exchanger (42). Flows into the heat exchanger (11) and is condensed by the latent heat of vaporization of the primary-side refrigerant, and the driving force generation unit (1
Perform circulation to return to D). That is, the secondary-side refrigerant rapidly cools the heat storage medium in the heat storage tank (41) by the heat storage heat exchanger (42). During this pull-down operation, the preheating heat exchanger (45) is not used.

<Cold Storage Operation> As shown in FIG. 34, in the case of the cold storage operation performed after the pull-down operation, the preheat heat exchanger (4
The operation of preheating the heat storage medium is added in 5). First, the primary side circuit (20) switches the four-way switching valve (22) to the solid line side, closes the on-off valve (SV) of the main passage (2a), and sets the compressor (2
The primary-side refrigerant discharged from 1) is condensed in the heat-source-side heat exchanger (23), passes through the bypass path (2b), and remains in the liquid phase in the auxiliary heat exchanger (1).
Supercooled in 2). Thereafter, the liquid-phase primary-side refrigerant returns to the main passage (2a), expands at the electric valve (EV), and flows into the main heat exchanger (1).
The circulation which evaporates in 1) and returns to the compressor (21) is performed.

The secondary side circuit (30) switches the four-way switching valve (32) to the broken line side, and drives the indoor electric valve (EV) and the take-out passage (4c).
With the motorized valve (EV) closed, drive unit (1
D) and the circulation pump (44) are driven. By driving the circulation pump (44), the heat storage medium is turned into a heat storage tank (41) and a heat storage heat exchanger (42).
Circulates between On the other hand, the driving force generation unit (1D)
The secondary refrigerant in the liquid phase discharged from the heat storage passage (4a) is divided into an auxiliary passage (4e), and the secondary refrigerant flowing through the heat storage passage (4a) is passed through the heat storage heat exchanger (42). After evaporating, the secondary refrigerant flows into the main heat exchanger (11), condenses with the latent heat of evaporation of the primary refrigerant, and circulates back to the driving force generating unit (1D).

The secondary refrigerant flowing through the auxiliary passage (4e) exchanges heat with the high-temperature primary refrigerant in the auxiliary heat exchanger (12). At the same time, the secondary refrigerant flows into the preheating heat exchanger (45), exchanges heat with the heat storage medium in the preheating heat exchanger (45), and preheats the heat storage medium to form a liquid phase. Circulates back to the driving force generation unit (1D). That is, the secondary-side refrigerant cools the heat storage medium in the heat storage tank (41) by the heat storage heat exchanger (42), generates ice, and stores cold heat in the heat storage tank (41).

<Cooling Operation Using Heat Storage> As shown in FIG. 35, when performing the cooling operation using the stored cold heat, the primary circuit (20) is stopped.

The secondary circuit (30) switches the four-way switching valve (32) to the broken line side, and drives the outdoor electric valve (EV), the electric valve (EV) of the auxiliary passage (4e) and the heat storage passage (4a). ), The driving force generating unit (1D) and the circulating pump (44) are driven with the electric valve (EV) closed. The heat storage medium is stored in the heat storage tank by driving the circulation pump (44).
It circulates between (41) and the heat exchanger for heat storage (42). On the other hand, the liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) flows into the indoor heat exchanger (33), evaporates in the indoor heat exchanger (33), and thereafter, the secondary refrigerant Flows through the heat storage passage (4a), is condensed by the heat of the heat storage medium in the heat storage heat exchanger (42), and returns to the driving force generating unit (1D) through the extraction passage (4c). That is, the secondary-side refrigerant conveys the cold heat of the heat storage medium to the indoor heat exchanger (33) to cool the room.

<Normal Cooling Operation> As shown in FIG.
When performing normal cooling operation using the secondary refrigerant as a heat source, the primary circuit (20) switches the four-way switching valve (22) to the solid line side, and the primary refrigerant discharged from the compressor (21) is heated by the heat source. Side heat exchanger (23)
Circulates and expands with the electric valve (EV), evaporates in the main heat exchanger (11) and returns to the compressor (21).

The secondary circuit (30) switches the four-way switching valve (32) to the broken line side, and operates the electric valve (EV) of the heat storage passage (4a) and the extraction passage.
The driving force generation unit (1D) is driven with the electric valve (EV) of (4c) and the electric valve (EV) of the auxiliary passage (4e) closed. The liquid-phase secondary refrigerant discharged from the driving force generation unit (1D) flows into the indoor heat exchanger (33) and evaporates in the indoor heat exchanger (33). It flows into the main heat exchanger (11) and is condensed by the latent heat of vaporization of the primary-side refrigerant to generate a driving force generation unit (1
Perform circulation to return to D). That is, the secondary-side refrigerant conveys cold heat, which is latent heat of evaporation of the primary-side refrigerant, to the indoor heat exchanger (33) to cool the room.

<Cooling Cooling Operation Using Heat Storage> As shown in FIG. 37, when normal cooling operation is performed at the same time as using the stored cold heat, the state shown in FIG. 35 and FIG. In (20), the four-way switching valve (22) is switched to the solid line side, and the primary refrigerant discharged from the compressor (21) is condensed in the heat source side heat exchanger (23) and expanded by the electric valve (EV). And the main heat exchanger (1
The circulation which evaporates in 1) and returns to the compressor (21) is performed.

The secondary circuit (30) switches the four-way switching valve (32) to the broken line side, and the electric valve (EV) and the heat storage passage of the auxiliary passage (4e).
The driving force generation unit (1D) and the circulation pump (44) are driven while the electric valve (EV) in (4a) is closed. The circulation pump (4
The heat storage medium is driven by the drive of 4) and the heat storage tank (41) and the heat storage heat exchanger
Circulates between (42) and On the other hand, the driving force generation unit
The liquid-phase secondary refrigerant discharged from (1D) is supplied to the indoor heat exchanger (3
3), evaporates in the indoor heat exchanger (33), and thereafter, the secondary refrigerant is divided into a heat storage passage (4a) and a main heat exchanger (11), and flows through the heat storage passage (4a). The secondary refrigerant is a heat storage heat exchanger (4
In 2), the refrigerant is condensed by the cold heat of the heat storage medium, and returns to the driving force generating unit (1D) through the removal passage (4c). Further, the secondary-side refrigerant flowing into the main heat exchanger (11) is supplied to the main heat exchanger (1).
In 1), the refrigerant is condensed by the latent heat of vaporization of the primary-side refrigerant and returned to the driving force generation unit (1D). That is, the secondary refrigerant is
The cold heat of the heat storage medium and the cold heat, which is the latent heat of evaporation of the primary refrigerant, are conveyed to the indoor heat exchanger (33) to cool the room.

<Heat Storage Operation> As shown in FIG. 38, when storing heat, the primary circuit (20) switches the four-way switching valve (22) to the broken line side and discharges from the compressor (21). The primary-side refrigerant condenses in the main heat exchanger (11), expands in the electric valve (EV), evaporates in the heat-source-side heat exchanger (23), and returns to the compressor (21).

The secondary circuit (30) switches the four-way switching valve (32) to the solid line side, and drives the indoor electric valve (EV), the electric valve (EV) in the take-out passage (4c) and the auxiliary passage (4e). ), The driving force generating unit (1D) and the circulating pump (44) are driven with the electric valve (EV) closed. By driving the circulation pump (44), the heat storage medium circulates between the heat storage tank (41) and the heat storage heat exchanger (42). on the other hand,
The liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) flows into the main heat exchanger (11) and evaporates with the latent heat of condensation of the primary refrigerant. Heat exchanger (42)
And is condensed by the heat storage heat exchanger (42) and returned to the driving force generation unit (1D). That is, the secondary-side refrigerant heats the heat storage medium of the heat storage tank (41) by the heat storage heat exchanger (42) and stores heat such as hot water.

<Heating Operation Using Heat Storage> As shown in FIG. 39, when the heating operation is performed using the stored heat, the primary circuit (20) is stopped.

The secondary circuit (30) switches the four-way switching valve (32) to the solid line side, and drives the outdoor electric valve (EV), the electric valve (EV) of the auxiliary passage (4e), and the heat storage passage (4a). ), The driving force generating unit (1D) and the circulating pump (44) are driven with the electric valve (EV) closed. The heat storage medium is stored in the heat storage tank by driving the circulation pump (44).
It circulates between (41) and the heat exchanger for heat storage (42). On the other hand, the liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) flows through the extraction passageway (4c) to the heat storage heat exchanger (42), evaporates with the heat of the heat storage medium, and then evaporates. , The secondary refrigerant is
A circulation that flows to the indoor heat exchanger (33), condenses in the indoor heat exchanger (33), and returns to the driving force generation unit (1D) is performed. That is,
The secondary refrigerant transfers the heat of the heat storage medium to the indoor heat exchanger (33).
To heat the room.

<Normal Heating Operation> As shown in FIG.
When performing a normal heating operation using the secondary refrigerant as a heat source, the primary circuit (20) switches the four-way switching valve (22) to the broken line side, and the primary refrigerant discharged from the compressor (21) is mainly used. The condensed gas in the heat exchanger (11) passes through the first passage (2c) and passes through the electric valve (E) of the main passage (2a).
V), after passing through the second passage (2d), the heat source side heat exchanger
Circulation which evaporates in (23) and returns to the compressor (21) is performed.

The secondary circuit (30) switches the four-way switching valve (32) to the solid line side, and operates the electric valve (EV) of the heat storage passage (4a) and the extraction passage.
The driving force generation unit (1D) is driven with the electric valve (EV) of (4c) and the electric valve (EV) of the auxiliary passage (4e) closed. The liquid-phase secondary refrigerant discharged from the driving force generation unit (1D) flows into the main heat exchanger (11) and evaporates with the latent heat of condensation of the primary refrigerant, and thereafter, the indoor heat exchanger (33) And is condensed in the indoor heat exchanger (33) and returns to the driving force generating unit (1D). That is, the secondary-side refrigerant conveys heat, which is latent heat of condensation of the primary-side refrigerant, to the indoor heat exchanger (33) to heat the room.

<Combined Heating Operation Using Heat Storage> As shown in FIG. 41, when normal heating operation is performed at the same time as using the stored heat, the state shown in FIG. 39 and FIG. (20) switches the four-way switching valve (22) to the broken line side, and the primary refrigerant discharged from the compressor (21) is condensed in the main heat exchanger (11) and expanded by the electric valve (EV). Then, circulation is performed in the heat source side heat exchanger (23), which evaporates and returns to the compressor (21).

The secondary circuit (30) switches the four-way switching valve (32) to the solid line side and closes the electric valve (EV) in the heat storage passage (4a) and the electric valve (EV) in the auxiliary passage (4e). In this state, the driving force generation unit (1D) and the circulation pump (44) are driven.
By driving the circulation pump (44), the heat storage medium is stored in the heat storage tank (4).
Circulates between 1) and the heat storage heat exchanger (42). on the other hand,
The liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) flows separately into the take-out passage (4c) and the main heat exchanger (11), and flows into the main heat exchanger (11). The secondary refrigerant evaporates by the latent heat of condensation of the primary refrigerant. Further, the secondary-side refrigerant flowing in the extraction passage (4c) flows through the heat storage heat exchanger (42) and evaporates with the heat of the heat storage medium. Thereafter, the secondary-side refrigerant merges and flows into the indoor heat exchanger (33), and condenses in the indoor heat exchanger (33) and circulates back to the driving force generating unit (1D). In other words, the secondary refrigerant converts the heat of the heat storage medium and the heat of condensation latent heat of the primary refrigerant into the indoor heat exchanger (33).
To heat the room.

-Effects of Embodiment- As described above, according to the eleventh embodiment, the heat storage circuit (40)
Is configured as a dynamic type, a system combining various heat source capacities and heat storage capacities can also be constructed in the dynamic type heat storage circuit, and the degree of freedom of combination can be improved. Other effects are the same as those of the fourth embodiment.

-Variations- In this embodiment, the primary refrigerant and the secondary refrigerant may be the same refrigerant or different refrigerants as in the fourth embodiment. In particular, a low-pressure refrigerant is used as the secondary refrigerant. For example, R134a
Can be used to perform high-temperature heat storage.

[0209]

Twelfth Embodiment In this embodiment, as shown in FIG. 42, the heat storage circuit (40) is a dynamic type and has a preheating heat exchanger (45) as in the eleventh embodiment. A four-way switching valve (46) is provided between the passage (4e) and the heat storage passage (4a).

In other words, between the preheat heat exchanger (45) and the auxiliary heat exchanger (12) in the auxiliary passage (4e) is connected to the two ports of the four-way switching valve (46). The other two ports of the four-way switching valve (46) are a heat storage heat exchanger in the heat storage passage (4a).
(42) and the secondary circuit (30).

A heating passage having an on-off valve (SV) is connected to the bypass passage (2b) of the primary circuit (20). One end of the heating passage is connected to an auxiliary passage in the bypass passage (2b). Heat exchanger
The other end is connected to the suction side of the compressor (21) while being connected between the (12) and the on-off valve (SV). Other configurations are
This is the same as the eleventh embodiment.

-Operation- Next, the heating operation using heat storage in the regenerative air conditioner (10) will be described. This operation is performed when the heating operation is performed using the heat stored in the heat storage tank (41). And
As shown in FIG. 42, first, the primary side circuit (20) switches the four-way switching valve (22) to the dashed line side, and the main passage (2a).
Valve (SV) is closed. In this state, the compressor
The primary-side refrigerant discharged from (21) is condensed in the heat-source-side heat exchanger (23), passes through the first passage (2c), passes through the bypass passage (2b), and expands with the electric valve (EV). Thereafter, the primary-side refrigerant evaporates in the auxiliary heat exchanger (12) and then returns to the compressor (21).

The secondary circuit (30) switches the four-way switching valve (32) to the solid line side, and operates the electric valve (EV) and the auxiliary passage of the heat storage passage (4a).
With the electric valve (EV) of (4e) closed, drive the driving force generation unit (1D) and the circulation pump (44), and
The four-way switching valve (46) of (4e) is switched to the broken line side. By driving the circulation pump (44), the heat storage medium circulates between the heat storage tank (41) and the heat storage heat exchanger (42).

On the other hand, the liquid-phase secondary refrigerant discharged from the driving force generation unit (1D) flows separately into the take-out passage (4c) and the main heat exchanger (11), and flows therethrough. Flows through the heat storage passage (4a), evaporates with the heat of the heat storage medium in the heat storage heat exchanger (42), and then flows through the auxiliary passage (4e) through the four-way switching valve (46). The flow exchanges heat with the primary refrigerant in the auxiliary heat exchanger (12), and condenses with the latent heat of evaporation of the primary refrigerant and returns to the driving force generation unit (1D).

Further, the secondary refrigerant flowing to the main heat exchanger (11) exchanges heat with the primary refrigerant in the main heat exchanger (11), and the latent heat of condensation of the primary refrigerant. Evaporate indoor heat exchanger
(33), condenses in the indoor heat exchanger (33), and returns to the driving force generation unit (1D). That is, the secondary refrigerant transfers the heat of the heat storage medium to the indoor heat exchanger (33) via the primary refrigerant to heat the room.

Other operations such as the cold storage operation are the same as those of the eleventh embodiment. At this time, the four-way switching valve (46) of the auxiliary passage (4e) is switched to the solid line side in FIG.

-Effects of Embodiment- As described above, according to the twelfth embodiment, the auxiliary heat exchanger
(12) is switched to the preheat heat exchanger (45) and the heat exchanger for heat storage (42) so that they communicate with each other, without using a low-pressure refrigerant or the like as the secondary refrigerant, the heat storage tank (41) The heating operation utilizing heat storage can be performed by reliably using the stored heat. Other effects are the same as those of the eleventh embodiment.

[0218]

Embodiment 13 In this embodiment, as shown in FIG. 43, the heat storage circuit (40) is of a dynamic type and has a preheating heat exchanger (45), as in the eleventh embodiment. An independent auxiliary circuit (50) is provided.

The auxiliary circuit (50) includes a compressor (51), an auxiliary circuit side of a preheating heat exchanger (45), an electric valve (EV), and a heat storage auxiliary heat exchanger.
The auxiliary circuit side of (47) is constituted by a vapor compression refrigeration cycle connected in order, the auxiliary refrigerant of the auxiliary circuit (50) is condensed in the preheating heat exchanger (45), and the heat storage auxiliary heat exchanger (47) It is configured to evaporate.

The heat storage side of the preheat heat exchanger (45) is a circulation passage.
(4b) is connected, while the heat storage auxiliary heat exchanger (47)
An extraction passage (4d) is connected to the next side. The use passage
One end of (4d) is connected via an electric valve (EV) to a liquid line between the four-way switching valve (32) in the secondary circuit (30) and the outdoor electric valve (EV). The end is connected to a gas line between the indoor heat exchanger (33) and the main heat exchanger (11) in the secondary circuit (30). The heat exchanger for heat dissipation is configured to exchange heat between the secondary refrigerant and the auxiliary refrigerant.

The primary circuit (20) includes a compressor (21), a four-way switching valve (22), a heat source side heat exchanger (23), an electric valve (EV), and a main circuit, similarly to the fourth embodiment. The heat exchanger (11) is connected in order. Other configurations are the same as those of the eleventh embodiment.

-Operating operation- Next, the operating operation of the regenerative air conditioner (10) will be described. However, since the cold storage operation is different from that of the eleventh embodiment, the other cooling operation using heat storage is the same. Only the operation for performing cold storage will be described. In the cooling operation using heat storage, the electric valve (EV) in the take-out passage (4d) is closed.

As shown in FIG. 43, in the case of the cold storage operation performed after the pull-down operation, the primary circuit (20) includes the four-way switching valve.
(22) is switched to the solid line side, and the primary refrigerant discharged from the compressor (21) is condensed in the heat source side heat exchanger (23) and expanded by the electric valve (EV), so that the main heat exchanger (11) A circulation is carried out to evaporate and return to the compressor (21).

The secondary circuit (30) switches the four-way switching valve (32) to the broken line side, and drives the electric valve (EV) on the indoor side and the extraction passage (4c).
With the motorized valve (EV) closed, drive unit (1
D) and the circulation pump (44) and the auxiliary circuit (50)
To drive. By driving the circulation pump (44), the heat storage medium circulates between the heat storage tank (41), the preheating heat exchanger (45), and the heat storage heat exchanger (42), while the auxiliary refrigerant in the auxiliary circuit (50). Is discharged from the compressor (51), condensed in the preheating heat exchanger (45), and
(EV) to decompress, evaporate in the auxiliary heat storage heat exchanger (47)
The circulation returning to (51) is performed. The heat storage medium flowing through the heat storage heat exchanger (42) is preheated by the preheat heat exchanger (45).

On the other hand, the liquid-phase secondary refrigerant discharged from the driving force generating unit (1D) flows through the heat storage passage (4a), evaporates in the heat storage heat exchanger (42), and then evaporates. The refrigerant is divided into the main heat exchanger (11) and the removal passage (4d), and the main heat exchanger (1
The secondary refrigerant flowing to 1) is condensed by the latent heat of vaporization of the primary refrigerant and circulates back to the driving force generating unit (1D).

The secondary refrigerant flowing through the outlet passage (4d) exchanges heat with the auxiliary refrigerant in the auxiliary heat storage heat exchanger (47), and is condensed by the latent heat of evaporation of the auxiliary refrigerant to generate the driving force generating unit. Perform circulation returning to (1D). That is, the secondary-side refrigerant cools the heat storage medium in the heat storage tank (41) by the heat storage heat exchanger (42), generates ice, and stores cold heat in the heat storage tank (41).

-Effects of Embodiment- As described above, according to the thirteenth embodiment, since the auxiliary circuit (50) for preheating the heat storage medium is provided,
Cold storage of ice or the like can be reliably performed. Other effects are the same as those of the eleventh embodiment.

[0228]

Fourteenth Embodiment In the fourteenth embodiment, as shown in FIG. 44, the auxiliary circuit (50) of the thirteenth embodiment is configured so that the refrigerant circulation direction is reversible.

That is, the auxiliary circuit (50) includes the compressor (51)
And a four-way switching valve (54), a preheat heat exchanger (45), an electric valve (EV), and a heat storage auxiliary heat exchanger (47). And the said heat storage auxiliary heat exchanger (47) is comprised so that the heat release of the auxiliary refrigerant | coolant at the time of a cold storage operation and the extraction of the warm heat at the time of a heating operation using heat storage may be performed.

-Operation- Next, the operation of the regenerative air conditioner (10) will be described. The operation differs from the thirteenth embodiment in the heat storage heating operation described in the eleventh embodiment. Since the cooling operation and the like are the same, only the heating operation using heat storage will be described. In the cooling operation using heat storage, the electric valve (EV) in the take-out passage (4d) is closed.

As shown in FIG. 44, the primary side circuit (20) stops, while the secondary side circuit (30) switches the four-way switching valve (32) to the broken line side, and the outdoor electric valve ( EV), the electric valve (EV) in the heat storage passage (4a) and the electric valve (EV) in the take-out passage (4c) are closed, and while the conveying means (31) and the circulation pump (44) are driven, the auxiliary circuit Drive (50). By driving the circulation pump (44), the heat storage medium circulates between the heat storage tank (41), the preheating heat exchanger (45), and the heat storage heat exchanger (42), while the auxiliary refrigerant in the auxiliary circuit (50). Is a heat storage auxiliary heat exchanger discharged from the compressor (51).
Condensed in (47), depressurized by electric valve (EV), and preheat heat exchanger (45)
The heat exchange medium exchanges heat with the heat storage medium and evaporates by the heat of the heat storage medium to return to the compressor (51).

On the other hand, the liquid-phase secondary refrigerant discharged from the driving force generation unit (1D) flows through the use passage (4d), exchanges heat with the auxiliary refrigerant in the auxiliary heat storage heat exchanger (47), and The secondary refrigerant evaporates by the latent heat of condensation of the auxiliary refrigerant, and then the secondary refrigerant flows into the indoor heat exchanger (33) to heat the indoor air, condenses, and circulates back to the driving force generation unit (1D). That is, the above 2
The secondary refrigerant transfers the heat of the heat storage medium to the indoor heat exchanger (33) via the auxiliary refrigerant to heat the room.

-Effects of Embodiment- As described above, according to the fourteenth embodiment, the preheating heat exchanger
Since the heat of the heat storage medium is extracted by using (45), the circuit configuration can be simplified. Other effects are the same as those of the eleventh embodiment.

[0234]

Embodiment 15 In this embodiment, as shown in FIG. 45, the heat storage circuit (40) is of a dynamic type similarly to Embodiment 11, but does not include the preheating heat exchanger (45). It is. Therefore, the circulation circuit of the heat storage circuit (40) is configured by connecting the circulation pump (44) and the heat storage heat exchanger (42), while the auxiliary passage (4e) and the auxiliary heat exchanger of the eleventh embodiment.
(12) is not provided. The primary circuit (20) includes a compressor (21), a four-way switching valve (22), a heat source side heat exchanger (23), an electric valve (EV), and a main heat exchanger, as in the fourth embodiment. And (11) are connected in order. Other configurations are described in Embodiment 1.
Same as 1.

-Operation- Next, the operation of the regenerative air conditioner (10) is different from that of the eleventh embodiment in that the preheat heat exchanger (45) is not used during the cold storage operation of the eleventh embodiment. However, other heat storage cooling operations are the same. That is, in the present embodiment, the pull-down operation and the cold storage operation of the eleventh embodiment are in the same operation state. The primary circuit (20)
It only switches between the forward cycle of the solid arrow in FIG. 45 and the reverse cycle of the chain arrow in FIG.

-Effects of Embodiment- As described above, according to the fifteenth embodiment, the preheating heat exchanger
Since (45) is omitted, the circuit configuration can be further simplified. Other effects are the same as those of the eleventh embodiment.

[0237]

Sixteenth Embodiment In this embodiment, as shown in FIG. 46, as in the fifteenth embodiment, the heat storage circuit (40) is of a dynamic type and does not have a preheat heat exchanger (45). An auxiliary circuit (50) for extracting heat is provided.

That is, in the present embodiment, the preheating heat exchanger (45) and the heat storage auxiliary heat exchanger (47) of the auxiliary circuit (50) in the fourteenth embodiment (see FIG. 44) The auxiliary circuit (50) is configured with a heat exchanger (53) and an auxiliary use heat exchanger (52), and the auxiliary refrigerant discharged from the compressor (51) is supplied to the auxiliary use heat exchanger (52). It is configured to perform only the normal cycle operation of condensing, evaporating and circulating in the auxiliary heat source heat exchanger (53).

-Operating operation- Next, the operating operation of the regenerative air conditioner (10) is the same as that of the fifteenth embodiment except that the heating operation using heat storage is different, and the other cooling operation using heat storage is the same. . Further, the heat storage utilizing heating operation is performed in the same manner as in Embodiment 14,
The auxiliary refrigerant of the auxiliary circuit (50) is discharged from the compressor (51), condensed in the auxiliary heat exchanger (52), passes through the electric valve (EV), and is stored in the auxiliary heat source heat exchanger (53). A circulation is performed by evaporating due to the heat of the compressor and returning to the compressor (51). On the other hand, the secondary refrigerant in the liquid phase discharged from the driving force generation unit (1D)
d), evaporates by the condensing latent heat of the auxiliary refrigerant in the auxiliary heat exchanger (52), heats the indoor air in the indoor heat exchanger (33), condenses and returns to the driving force generation unit (1D) I do. That is, the secondary-side refrigerant conveys the heat of the heat storage medium to the indoor heat exchanger (33) via the auxiliary refrigerant to heat the room.

-Effects of Embodiment- As described above, according to the sixteenth embodiment, the auxiliary circuit (50)
Since the heat of the heat storage medium is taken out by this, the heating operation using the heat storage can be reliably performed. Other effects are the same as those of the eleventh embodiment.

[0241]

Seventeenth Embodiment As shown in FIG. 47, the present embodiment differs from the fifteenth embodiment in that the heat storage circuit (40) is of a dynamic type and is not provided with a preheat heat exchanger (45). In addition, an auxiliary passage (4e) for taking out heat is provided.

That is, this embodiment is different from the twelfth embodiment (see FIG. 42) in that the preheat heat exchanger (45) and the auxiliary heat storage heat exchanger (4)
7) is constituted by the heat storage auxiliary heat exchanger (47) and the auxiliary heat exchanger (12), while the four-way switching valve of the auxiliary passage (4e) of the twelfth embodiment is used.
(22) is not provided.

-Operating operation- Next, the operating operation of the regenerative air conditioner (10) is the same as that of the fifteenth embodiment except that the heating operation using heat storage is different, and the other cooling operation using heat storage is the same. . In addition, as shown in FIG.
The secondary circuit (20) switches the four-way switching valve (22) to the broken line side and closes the on-off valve (SV) of the main passage (2a). In this state, the primary-side refrigerant discharged from the compressor (21) is condensed in the heat-source-side heat exchanger (23), passes through the first passage (2c), passes through the bypass passage (2b), and flows through the electric valve ( EV) to expand. After that, the primary refrigerant is evaporated in the auxiliary heat exchanger (12),
Circulation returning to the compressor (21) is performed via a heating passage.

The secondary circuit (30) switches the four-way switching valve (32) to the solid line side, and closes the electric valve (EV) in the heat storage passage (4a) and the electric valve (EV) in the extraction passage (4c). In this state, the driving force generation unit (1D) and the circulation pump (44) are driven. The circulation pump
By driving (44), the heat storage medium circulates between the heat storage tank (41) and the heat exchanger for heat storage (42).

On the other hand, the secondary refrigerant in the liquid phase discharged from the driving force generation unit (1D) passes through the auxiliary passage (4e) and the main heat exchanger.
The secondary-side refrigerant flowing through the auxiliary passage (4e) is evaporated by the heat of the heat storage medium in the heat storage auxiliary heat exchanger (47), and then evaporated in the auxiliary heat exchanger (12). Heat exchange with the secondary refrigerant,
Driving force generation unit (1D) condensed by latent heat of vaporization of secondary refrigerant
Return to the circulation.

[0246] The secondary refrigerant flowing into the main heat exchanger (11) exchanges heat with the primary refrigerant in the main heat exchanger (11), and is condensed by latent heat of condensation of the primary refrigerant. Evaporate indoor heat exchanger
(33), condenses in the indoor heat exchanger (33), and returns to the driving force generation unit (1D). That is, the secondary refrigerant transfers the heat of the heat storage medium to the indoor heat exchanger (33) via the primary refrigerant to heat the room.

-Effects of Embodiment- As described above, according to the seventeenth embodiment, since heat is extracted by the auxiliary heat storage heat exchanger (47) and the auxiliary heat exchanger (12), the secondary side The heating operation using the heat storage can be performed by reliably using the heat stored in the heat storage tank (41) without using a low-pressure refrigerant or the like as the refrigerant. Other effects are
This is the same as the eleventh embodiment.

[0248]

Eighteenth Embodiment In this embodiment, as shown in FIG. 48, the heat storage circuit (40) is of a dynamic type and is not provided with a preheat heat exchanger (45), as in the fifteenth embodiment. In the seventeenth embodiment, a take-out heat exchanger (42) is provided.

That is, in the present embodiment, a heat storage heat exchanger (42) dedicated to heat storage for storing cold and warm heat, and a dedicated extraction heat exchanger (42) for extracting stored cold heat are provided. It is like that.

Specifically, the circulation passage (4b) of the heat storage circuit (40)
Is configured to be sequentially connected to the circulation pump (44), the auxiliary heat storage heat exchanger (47), the removal heat exchanger (43), and the heat storage heat exchanger (42). The auxiliary passage (4e) is connected to the auxiliary heat storage heat exchanger (47), while the heat storage passage (4a) is connected to the heat storage heat exchanger (42).
Is connected to an extraction passage (4c).

The heat storage passage (4a) includes an electric valve (EV).
One end is connected to a liquid line between the four-way switching valve (32) in the secondary circuit (30) and the electrically operated valve (EV) on the indoor side, and the other end is
Indoor heat exchanger (33) and main heat exchanger in secondary circuit (30)
(11) is connected to the gas line. The take-out passage (4c) is provided with a motor-operated valve (EV), one end of which is connected to the four-way switching valve (32) in the secondary circuit (30) and the outdoor-side motor-operated valve (EV).
And the other end is connected to the secondary circuit (30)
Is connected to a gas line between the indoor heat exchanger (33) and the main heat exchanger (11).

-Operating operation- Next, the operating operation of the regenerative air conditioner (10) is different from that of the seventeenth embodiment in that the cold storage operation, the warm storage operation, and the combined cooling operation using the heat storage are different. Use heating operation etc. are the same. That is, during the cold heat storage operation and the warm heat storage operation, the secondary refrigerant flows through the heat storage passage (4a), and the heat storage heat exchanger (4
In step 2), the secondary-side refrigerant and the heat storage medium exchange heat to generate ice or hot water. The secondary refrigerant flows through the extraction passageway (4c), and the secondary refrigerant and the heat storage medium exchange heat in the extraction heat exchanger (42) to extract cold heat.

-Effects of Embodiment- As described above, according to the eighteenth embodiment, the heat exchanger (42) for heat storage and the heat exchanger (42) for removal are provided, so that this embodiment is suitable for heat storage. It is possible to set a heat exchanger and a heat exchanger suitable for taking out heat storage, so that heat storage and the like can be performed efficiently. Other effects are the same as those of the seventeenth embodiment.

[0254]

Nineteenth Embodiment As shown in FIG. 49, the present embodiment relates to an outdoor unit (1A) and an indoor unit of the fourth embodiment.
(1B) and a plurality of heat storage units (1C).
That is, the outdoor unit (1A), the indoor unit (1B), and the heat storage unit (1C) are configured in a multi-type, and the outdoor unit (1A), the indoor unit (1B), and the heat storage unit (1C) are arranged in parallel with each other. It is connected.

Therefore, the operation of the outdoor unit (1A) and the heat storage unit (1C) is the same as that of the fourth embodiment, but one or all of the heat storage units (1
While operating C), one or all outdoor units (1A) are operated according to the heat source capacity and the like. Further, the outdoor unit (1A) and the heat storage unit (1C) are operated in combination.

As a result, the outdoor unit (1A) and the heat storage unit (1C) can be operated in various combinations corresponding to the power demand and the like.

The outdoor unit (1A) and the heat storage unit (1C) are not limited to the circuits of the fourth embodiment, but may be the circuits of the fifth to eighteenth embodiments.

[0258]

Other Embodiments In each of the embodiments, 1
Although the secondary circuit (20) is constituted by a vapor compression refrigeration cycle, various heat sources such as an absorption refrigeration cycle may be applied.

Further, it may be a cooling-dedicated one that performs only the cold heat storage operation, the heat storage utilizing cooling operation, and the normal cooling operation.
Further, the heater may be dedicated to heating that performs only the warm heat storage operation, the heat storage utilizing heating operation, and the normal heating operation.

In the cooling operation using the heat storage in each of the embodiments, the cooling operation using only the heat storage without the normal cooling operation may be performed. On the contrary, the cooling operation using only the heat storage is not performed. Only the combined operation of cooling using heat storage and normal cooling may be performed.

In the heating operation using the heat storage in each of the embodiments, the heating operation using only the heat storage without using the normal heating operation may be performed. In the heating operation using heat storage in 5, 7 to 11, and 13 to 19, the heating operation using only heat storage is not performed, and only the combined operation of heating using heat storage and normal heating may be performed.

The circulating pump (4
4) is disposed downstream of the take-out heat exchanger (43) and the like, but may of course be disposed upstream of the take-out heat exchanger (43) and the like.

(Modification of Driving Force Generation Circuit) Next, a modification of the driving force generation circuit will be described. In each of the embodiments described above, the secondary refrigerant is circulated by alternately switching between the pressurizing operation and the depressurizing operation for one tank (61). Tank (61A, 61B)
Is used.

As shown in FIG. 50, a pair of tanks (61A, 6A)
1B), the refrigerant is pushed out from one tank (61A), and the refrigerant is recovered in the other tank (61B), and by repeating this alternately, continuous circulation of the refrigerant is achieved. Is what makes it possible. That is, a part of the liquid line is branched, and the tanks (61A, 61B) are individually connected to the respective branch lines (LL-A, LL-B). Each tank (61A, 61B) has a pressurized heat exchanger (62) and a depressurized heat exchanger (63) that can be selectively connected by solenoid valves (SV-A to SV-D). Has become.

With this configuration, one of the tanks (61A) is connected to the pressurizing heat exchanger (62) and the other tank (61B) is connected to the depressurizing heat exchanger (63). (61A)
After being circulated through the secondary circuit (30), the refrigerant pushed out of the tank is recovered in the other tank (61B). After maintaining this state for a predetermined time, the solenoid valves (SV-A to SV-D) are switched, the other tank (61B) is connected to the pressurizing heat exchanger (62), and one tank (61A) is connected. Connect to the heat exchanger for pressure reduction (63). Thereby, the tank for extruding the refrigerant and the tank for collecting the refrigerant are switched. By repeating such an operation, continuous circulation of the refrigerant in the secondary circuit (30) becomes possible, and continuous air conditioning in the room can be performed.

[0266]

As described above, according to the present invention, the following effects are exhibited.

According to the first aspect of the present invention, the heat storage circuit (4
0) is connected to the secondary circuit (30), and the heat of the primary circuit (20) is
Since the heat is stored via the secondary refrigerant, the primary circuit (20) can be configured as one independent circuit, and the heat source capacity can be reduced by connecting a plurality of primary circuits (20). It can be set arbitrarily. At the same time, the heat storage capacity can be arbitrarily set by connecting a plurality of heat storage circuits (40).

As a result, a system in which various heat source capacities and heat storage capacities are combined can be constructed, and the degree of freedom of combination can be improved.

Further, since the primary side circuit (20) is only the heat source circuit, the lubricating oil can be easily managed, so that the operation control can be simplified.

The primary circuit (20) and the secondary circuit (3
0), the existing piping can be reused.

Further, since the heat storage circuit (40) is provided, it is possible to suppress the maximum power consumption.

Further, the circulation driving force of the secondary heat medium is obtained by utilizing the high pressure generated by heating the liquid-phase secondary heat medium or the low pressure generated by cooling the gas-phase secondary heat medium. As in the case where a compressor or a mechanical pump is used as a source of the circulating driving force, the power consumption does not increase, and since mechanical means is used. In addition, the number of failure occurrence locations can be reduced, and the reliability of the entire apparatus can be improved.

In the invention according to claim 2, the driving force generating circuit
The secondary heat medium of the driving force generating circuit (60) is heated or cooled by the driving heat medium circulating in the drive source circuit (70) capable of heat exchange with the secondary heat medium (60). I try to get the driving force. For this reason, heating or cooling of the secondary-side heat medium can be reliably performed, a circulating driving force of the secondary-side heat medium can be reliably obtained, and the reliability of the device can be improved.

In the invention according to claim 3, the pressurizing means (62) is heated by the heater (71). Also,
According to a fourth aspect of the present invention, the pressure means (62) is connected to the Peltier device (7
Heating is performed according to 2). According to a fifth aspect of the present invention, the pressure reducing means (63) is cooled by the Peltier element (72). Thus, means for obtaining the circulating driving force of the secondary-side heat medium can be realized without providing a special circuit as a heat source for generating the circulating driving force, and the practicality of the device can be improved.

The invention according to claims 6 and 8 provides a primary circuit
In (20), a function as a heat source and a function as a drive source for obtaining a driving force for transporting the secondary-side heat medium are provided. For this reason, it is not necessary to separately provide the means functioning as the heat source and the drive source, and the circuit configuration can be simplified. As a result, the manufacturing cost of the device can be reduced.

According to the seventh and ninth aspects of the present invention, the primary side circuit is provided.
(20) is a refrigerant circuit for performing a vapor compression refrigeration cycle,
By the primary side heat medium which circulates through the circuit (20) and changes phase,
The heat for obtaining the transport driving force was obtained. For this reason, a high calorific value for sufficiently obtaining the transport driving force is obtained,
A sufficient circulation amount of the secondary heat medium can be obtained, and the air conditioning capacity can be improved.

According to the tenth aspect, the tank means (61) storing the liquid-phase secondary heat medium is pressurized and depressurized to obtain a transport driving force. For this reason, the operation of pushing out and recovering the liquid refrigerant from the transfer means (60) can be favorably performed.

According to an eleventh aspect of the present invention, a pair of tank means (61A, 61B) is provided, one of which pushes out the secondary heat medium and the other which sucks the secondary heat medium. Was alternately switched. For this reason, heat absorption or heat radiation of the use-side heat exchanger (33) can be continuously performed, and the indoor air-conditioning state can be properly maintained for a long time, and the indoor comfort can be maintained.

According to a twelfth aspect of the present invention, there is provided a heat storage circulation circuit (48) comprising a heat storage tank (41), a heat storage medium transport means (44), and a heat storage heat exchanger (42). The heat exchange between the secondary heat medium and the heat storage medium is performed in the vessel (42).
For this reason, a so-called dynamic type cold heat storage device can be realized, and the cold heat can be quickly taken out by storing the slurry ice.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a first embodiment.

FIG. 2 is a circuit diagram showing a cold storage operation operation in the first embodiment.

FIG. 3 is a circuit diagram showing a first type heat storage utilizing cooling operation operation in the first embodiment.

FIG. 4 is a circuit diagram showing a second type of cooling operation using heat storage according to the first embodiment.

FIG. 5 is a circuit diagram showing a normal cooling operation in the first embodiment.

FIG. 6 is a circuit diagram illustrating a heat storage operation in the first embodiment.

FIG. 7 is a circuit diagram showing a first-type heat storage utilizing heating operation in the first embodiment.

FIG. 8 is a circuit diagram showing a second type of heat storage utilizing heating operation operation in the first embodiment.

FIG. 9 is a circuit diagram showing a normal heating operation in the first embodiment.

FIG. 10 is a circuit diagram showing a second embodiment.

FIG. 11 is a circuit diagram showing a cold storage operation operation according to the second embodiment.

FIG. 12 is a circuit diagram illustrating a cooling operation using heat storage according to the second embodiment.

FIG. 13 is a circuit diagram showing a normal cooling operation in the second embodiment.

FIG. 14 is a circuit diagram illustrating a heat storage operation operation according to the second embodiment.

FIG. 15 is a circuit diagram showing a heating operation using heat storage according to the second embodiment.

FIG. 16 is a circuit diagram showing a normal heating operation in the second embodiment.

FIG. 17 is a circuit diagram showing a third embodiment.

FIG. 18 is a circuit diagram showing a fourth embodiment.

FIG. 19 is a circuit diagram illustrating a cold storage operation according to a fourth embodiment.

FIG. 20 is a circuit diagram illustrating a cooling operation using heat storage according to a fourth embodiment.

FIG. 21 is a circuit diagram illustrating a normal cooling operation according to a fourth embodiment.

FIG. 22 is a circuit diagram illustrating a thermal storage operation according to a fourth embodiment.

FIG. 23 is a circuit diagram illustrating a heat storage utilizing heating operation according to a fourth embodiment.

FIG. 24 is a circuit diagram illustrating a normal heating operation according to a fourth embodiment.

FIG. 25 is a circuit diagram showing a fifth embodiment.

FIG. 26 is a circuit diagram showing a sixth embodiment.

FIG. 27 is a Mollier diagram showing a heating operation using heat storage according to the sixth embodiment.

FIG. 28 is a circuit diagram showing a seventh embodiment.

FIG. 29 is a circuit diagram showing an eighth embodiment.

FIG. 30 is a circuit diagram showing a ninth embodiment;

FIG. 31 is a circuit diagram showing a tenth embodiment.

FIG. 32 is a circuit diagram showing an eleventh embodiment.

FIG. 33 is a circuit diagram illustrating a pull-down operation according to an eleventh embodiment.

FIG. 34 is a circuit diagram illustrating a cold storage operation according to an eleventh embodiment.

FIG. 35 is a circuit diagram illustrating a cooling operation using heat storage according to an eleventh embodiment.

FIG. 36 is a circuit diagram illustrating a normal cooling operation according to an eleventh embodiment.

FIG. 37 is a circuit diagram showing a combined operation of heat storage use cooling and normal cooling in the eleventh embodiment.

FIG. 38 is a circuit diagram illustrating a heat storage operation according to an eleventh embodiment.

FIG. 39 is a circuit diagram illustrating a heat storage utilizing heating operation according to an eleventh embodiment.

FIG. 40 is a circuit diagram illustrating a normal heating operation according to an eleventh embodiment.

FIG. 41 is a circuit diagram showing a combined operation of heat storage heating and normal heating according to an eleventh embodiment.

FIG. 42 is a circuit diagram showing a twelfth embodiment;

FIG. 43 is a circuit diagram showing a thirteenth embodiment;

FIG. 44 is a circuit diagram showing a fourteenth embodiment.

FIG. 45 is a circuit diagram showing a fifteenth embodiment;

FIG. 46 is a circuit diagram showing a sixteenth embodiment.

FIG. 47 is a circuit diagram showing a seventeenth embodiment.

FIG. 48 is a circuit diagram showing an eighteenth embodiment.

FIG. 49 is a circuit diagram showing a nineteenth embodiment;

FIG. 50 is a diagram showing a modified example of the driving force generation circuit.

[Explanation of symbols]

 (11) Main heat exchanger (20) Primary circuit (30) Secondary circuit (33) Indoor heat exchanger (use side heat exchanger) (40) Thermal storage circuit (41) Thermal storage tank (42) For thermal storage Heat exchanger (44) Circulation pump (48) Water circuit (heat storage circulation circuit) (48a) Water pipe (heat storage pipe) (60) Driving power generation circuit (transportation means) (61) Tank (62) Heat exchange for pressurization (Pressurizing means) (63) Depressurizing heat exchanger (Depressurizing means) (70) Driving refrigeration circuit (Drive source circuit) (71) Condenser, heating means (72) Evaporator, cooling means

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F25B 13/00 F25B 1/00

Claims (12)

(57) [Claims] A primary heat medium serving as a heat source is a main heat exchanger (1).
1) a primary circuit (20) connected to the main heat exchanger (11) so as to circulate, and the main heat exchanger (11) and the use side heat exchanger (33) The medium is circulated, and the secondary heat medium is circulated by the circulation driving force of the conveying means (60), and the secondary heat medium is circulated to the main heat exchanger.
The secondary circuit (30) for transferring the heat obtained from the primary heat medium in (11) to the use side heat exchanger (33), and the secondary heat medium of the secondary circuit (30) circulates 2
A heat storage circuit (40) connected to the secondary circuit (30) and providing heat for heat storage to the heat storage medium, and a secondary circuit is provided between the heat storage circuit (40) and the main heat exchanger (11). A heat storage operation in which the side heat medium circulates and the secondary side heat medium stores heat obtained from the primary side heat medium in the main heat exchanger (11) in the heat storage medium; A heat storage utilization operation in which a secondary heat medium circulates between the heat exchanger (33) and the secondary heat medium conveys heat stored in the heat storage medium to the use side heat exchanger (33) for air conditioning. The secondary-side heat medium circulates through the secondary-side circuit (30), and the secondary-side heat medium uses heat obtained from the primary-side heat medium in the main heat exchanger (11) to a use-side heat exchanger ( 33) is configured to perform at least a normal operation of performing air conditioning by transporting the liquid to the secondary heat medium. The transport means (60) is configured to generate a high pressure by heating the secondary heat medium in the liquid phase. Pressure means (62) and gas phase 2
At least one of pressure reducing means (63) for generating a low pressure by cooling the secondary heat medium is provided, and this means (62), (6
A regenerative air conditioner characterized in that a circulation driving force of the secondary heat medium in each of the above operations is obtained by a difference between the pressure generated in 3) and the pressure in the secondary circuit (30). 2. The regenerative air-conditioning apparatus according to claim 1, wherein the transporting means includes a driving force generating circuit (60) capable of storing a liquid-phase secondary-side heat medium. The drive source circuit (70) is connected to the drive source circuit (70) in a heat-exchangeable manner. The secondary heat medium in the liquid phase
Heating means (71) for heating the liquid-phase secondary heat medium of the driving force generating circuit (60) by a drive heat medium so as to push the secondary heat medium to the secondary circuit (30); Cooling that evaporates the driving heat medium so that the liquid-phase secondary heat medium of the liquid phase is sucked into the driving force generation circuit (60) and cools the gas phase secondary heat medium of the driving force generation circuit (60) Means (72). A regenerative air conditioner comprising: 3. The regenerative air conditioner according to claim 1, wherein the pressurizing means (62) is heated by the heater (71) to evaporate the liquid phase secondary heat medium to generate a high pressure. A regenerative air conditioner, characterized in that: 4. The regenerative air conditioner according to claim 1, wherein the pressurizing means (62) is heated by the Peltier element (71) to evaporate the liquid-side secondary heat medium to generate a high pressure. A regenerative air conditioner, characterized in that: 5. The regenerative air conditioner according to claim 1, wherein the pressure reducing means (63) is cooled by the Peltier element (72) and condenses the gas phase secondary heat medium to generate a low pressure. A regenerative air conditioner characterized by the following. 6. The primary heat medium serving as a heat source is a main heat exchanger (1).
1,11 ') and a primary circuit (20) connected to the main heat exchanger (11,11'), a main heat exchanger (11,11 ') and a use side heat exchanger. (33) is connected to the secondary heat medium so that the secondary heat medium can be circulated, and the secondary heat medium is circulated by the circulation driving force of the conveying means (60), and the secondary heat medium is circulated by the main heat exchanger (11, 11 '), a secondary circuit (30) for transferring the heat obtained from the primary heat medium to the use side heat exchanger (33), and the secondary heat medium of the secondary circuit (30) is circulated. 2
A heat storage circuit (40) that is connected to the secondary circuit (30) and provides heat for heat storage to the heat storage medium, and is provided between the heat storage circuit (40) and the main heat exchangers (11, 11 ′). Heat storage operation in which the secondary heat medium circulates and the secondary heat medium stores heat obtained from the primary heat medium in the main heat exchanger (11, 11 ') in the heat storage medium; The secondary-side heat medium circulates between the (40) and the use-side heat exchanger (33), and the secondary-side heat medium conveys the heat stored in the heat storage medium to the use-side heat exchanger (33) for air conditioning. And the secondary heat medium is circulated through the secondary circuit (30) and the secondary heat medium is obtained from the primary heat medium by the main heat exchangers (11, 11 '). The main heat exchanger (11) is configured to perform at least a normal operation of transferring the heat to the use-side heat exchanger (33) and performing air conditioning. A high pressure is generated by heating the secondary heat medium of the Circuit (30) the difference between the thermal storage type air conditioner which is characterized in that it comprises a function of generating a circulation driving force of the secondary side heat medium to the pressure within. 7. The regenerative air conditioner according to claim 6, wherein the primary circuit (20) is a refrigerant circuit for performing a vapor compression refrigeration cycle, and the primary heat exchanger (11) has a primary circuit. A regenerative air conditioner wherein the side heat medium is condensed to heat the secondary side heat medium. 8. The primary heat medium serving as a heat source is a main heat exchanger (1).
1,11 ') and a primary circuit (20) connected to the main heat exchanger (11,11'), a main heat exchanger (11,11 ') and a use side heat exchanger. (33) is connected to the secondary heat medium so that the secondary heat medium can be circulated, and the secondary heat medium is circulated by the circulation driving force of the conveying means (60), and the secondary heat medium is circulated by the main heat exchanger (11, 11 '), a secondary circuit (30) for transferring the heat obtained from the primary heat medium to the use side heat exchanger (33), and the secondary heat medium of the secondary circuit (30) is circulated. 2
A heat storage circuit (40) that is connected to the secondary circuit (30) and provides heat for heat storage to the heat storage medium, and is provided between the heat storage circuit (40) and the main heat exchangers (11, 11 ′). Heat storage operation in which the secondary heat medium circulates and the secondary heat medium stores heat obtained from the primary heat medium in the main heat exchanger (11, 11 ') in the heat storage medium; The secondary-side heat medium circulates between the (40) and the use-side heat exchanger (33), and the secondary-side heat medium conveys the heat stored in the heat storage medium to the use-side heat exchanger (33) for air conditioning. And the secondary heat medium is circulated through the secondary circuit (30) and the secondary heat medium is obtained from the primary heat medium by the main heat exchangers (11, 11 '). The main heat exchanger (11 ') is configured to perform at least a normal operation of transferring the heat transferred to the use-side heat exchanger (33) to perform air conditioning. A low pressure is created by cooling the heating medium on the secondary side of the phase, Circuit (30) the difference between the thermal storage type air conditioner which is characterized in that it comprises a function of generating a circulation driving force of the secondary side heat medium to the pressure within. 9. The regenerative air conditioner according to claim 8, wherein the primary side circuit (20) is a refrigerant circuit for performing a vapor compression type refrigeration cycle, and the primary heat exchanger (11 ′) includes: A regenerative air conditioner wherein the secondary heat medium evaporates to cool the secondary heat medium. 10. A regenerative air conditioner according to claim 1, wherein the transport means (60) is capable of storing a liquid refrigerant in the tank means (61).
Tank means by heating the secondary-side heat medium in the liquid phase
A pressurizing operation in which a high pressure is applied to (61) to extrude a liquid-side secondary heat medium from the tank means (61), and the tank means (61) is cooled by cooling the gas-phase secondary heat medium. A heat storage characterized in that the refrigerant is circulated through the secondary circuit (30) by applying a low pressure to the tank means (61) and recovering the liquid-side secondary heat medium by a pressure reducing operation. Type air conditioner. 11. The regenerative air-conditioning apparatus according to claim 10, wherein the tank means comprises first and second tank means (61A, 61B) connected in parallel with each other. A first pressure action operation for applying a high pressure and applying a low pressure to the second tank means (61B);
A low pressure is applied to the tank means (61A) and the second tank means
(61B) is alternately switched to a second pressure action operation for applying a high pressure to the first tank means (6) during the first pressure action operation.
The liquid-side secondary heat medium is supplied from 1A) to the heat exchanger serving as the evaporator, and the secondary heat medium in the liquid phase is recovered from the heat exchanger serving as the condenser to the second tank means (61B). While the second
During the pressure action operation, the liquid-phase secondary-side heat medium is supplied from the second tank means (61B) to the heat exchanger serving as the evaporator, and the first tank means (61A) is supplied from the heat exchanger serving as the condenser. A regenerative air conditioner characterized in that a refrigerant is circulated so as to recover a secondary-side heat medium in a liquid phase so that the use-side heat exchanger (33) continuously absorbs or radiates heat. 12. The heat storage type air conditioner according to claim 1, wherein the heat storage tank (41) for storing the heat storage medium and a heat storage medium transport means (4).
4) and a heat storage heat exchanger (42) for exchanging heat between the heat storage medium and the secondary heat medium flowing through the heat storage circuit (40).
A heat storage type air conditioner, comprising: a heat storage circulation circuit (48) sequentially connected by (48a).