JPH0781731B2 - Operation control device for heat storage type air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an operation control device for controlling heat storage operation in a heat storage type air conditioner including a heat storage unit.

(Prior Art) Generally, in a heat storage type air conditioner, as disclosed in Japanese Patent Laid-Open No. 61-125554, a refrigerant circuit is formed by connecting an outdoor unit and an indoor unit, A heat storage unit having a heat storage tank that stores a possible heat storage medium is provided in the outdoor unit, the heat exchange coil in the heat storage tank and the refrigerant circuit are connected by a bypass path, and the bypass path and the refrigerant circuit are switched. Some are configured to connect. Then, by performing heat exchange between the refrigerant and the heat storage medium in the heat exchange coil, normal cooling and heating operation,
Cold storage operation, warm storage operation, etc. are performed.

(Problems to be Solved by the Invention) In the heat storage type air conditioner described above, when various operation controls are performed, for example, as disclosed in Japanese Utility Model Laid-Open No. 61-54129, an outdoor control unit and an indoor control unit. It is conceivable to send and receive a control signal to and from.

However, this has a problem that the outdoor control unit has to process various control data for controlling the operation of the heat storage unit, for example, control data of the switching valve, which increases the capacity of the outdoor control unit. In particular, the heat storage unit is not frequently used, and the control area of the heat storage unit is provided in the outdoor control unit, so that the outdoor control unit has a large capacity and becomes large in size.

Furthermore, in addition to the various operations described above, the operating range is being expanded by performing a cooling / heat storage simultaneous operation in which normal cooling and cold storage heat are performed simultaneously. At that time, there is a problem that the control data of the heat storage unit that is used less frequently increases, and the capacity of the outdoor control unit increases.

The present invention has been made in view of the above problems, and an object thereof is to reduce the capacity of the outdoor control unit and to downsize the outdoor control unit.

(Means for Solving the Problem) In order to achieve the above object, the means taken by the present invention is to separately provide a heat storage control unit for controlling the heat storage unit.

Specifically, as shown in FIG. 1, in the means taken by the invention according to claim 1, first, the outdoor unit (X) and the indoor unit (A) are connected by a refrigerant pipe (9), and A heat storage unit (Y) having a heat storage medium capable of storing heat is connected by a refrigerant pipe (9) to form a main refrigerant circuit (10). The main refrigerant circuit (10) performs only normal cooling operation for performing normal cooling and only cold storage heat in which the refrigerant flows from the outdoor unit (X) to only the heat storage unit (Y) to store cold heat in the heat storage unit (Y). A switching mechanism for switching the refrigerant circulation direction between a cold storage heat exclusive operation and a cooling heat storage simultaneous operation in which the refrigerant flows from the outdoor unit (X) to the heat storage unit (Y) and the indoor unit (A) to perform the cold storage heat and the cooling at the same time. ~ 17) are provided.

An outdoor control unit (50) including a processor (54) that processes a control signal to control the operation of the outdoor unit (X) is provided. The outdoor control unit (5
Indoor control provided with a processor (61) which is connected to the outdoor control unit (50) so as to exchange control signals with the indoor unit (0) and which processes the control signals to control the operation of the indoor unit (A). A unit (60) is provided.

Furthermore, the outdoor control unit (50) is connected to the outdoor control unit (50) so as to exchange control signals with the outdoor control unit (50),
A heat storage control unit (7) including a processor (71) for processing a control signal and controlling the operation of the heat storage unit (Y).
0) is provided. In addition, the control data input section (8
4) and a processor (81) connected to the heat storage control unit (70) so that the input section (84) is connected to process the control signal and output the control signal to the heat storage control unit (70). A heat storage controller (80) provided with is provided.

On the other hand, the processor (81) of the heat storage controller (80) is provided with operation command means (81b) for outputting a command signal for operating and stopping the cold heat to the heat storage control unit (70).

Further, the processor (71) of the heat storage control unit (70)
A cold storage heat operation switching means (74) for outputting a dedicated operation signal and a simultaneous operation signal so as to switch between the cold storage heat exclusive operation and the cooling heat storage simultaneous operation is connected to the processor, and the processor of the heat storage control unit (70) is connected to Upon receiving the command signal from the operation command means (81b), the operation signal and the stop signal for the cold storage heat are output to the outdoor control unit (50) at the (71), and the switching mechanism (14 to 17) during the operation of the cold storage heat. Storage heat operation means (71a) for controlling the operation of the heat storage unit (Y) by switching the
Is provided.

In addition, the outdoor control unit (50) processor (5
The operation unit (54a) for controlling the operation of the outdoor unit (X) by receiving the operation signal and the stop signal of the cold storage operation means (71a) is provided in 4).

Further, the means taken by the invention according to claim 2 is the invention according to claim 1, wherein the main refrigerant circuit (10) is configured to be capable of reversible operation between cooling operation and heating operation. Then, the switching mechanism (14 to 17) of the main refrigerant circuit (10) performs a normal heating operation for performing normal heating and a heating / heat storage simultaneous operation for performing heating and simultaneously storing warm heat in the heat storage unit (Y). The refrigerant flow direction is switchable.

In addition, the processor (71) of the heat storage control unit (70) is connected to a heat storage / heat storage operation switching means (75) for switching between normal heating operation and simultaneous heating and heat storage operation, and the heat storage control unit (70). The processor (71) receives the switching signal of the heat storage / heat storage operation switching means (75) and the switching mechanism (14).
To 17) are switched and controlled to control the operation of the heat storage unit (Y).

Moreover, the means taken by the invention according to claim 3 is the invention according to claim 1 or 2, wherein the heat storage controller (80) has a drive command means (81b) corresponding to a set time and a drive command signal and stop. An operation time setting means (81a) for setting the cold storage heat operation time of the heat storage unit (Y) is provided so as to output a command signal.

(Operation) With the above configuration, in the invention according to claim 1, the processor (54) of the outdoor control unit (50) includes the outdoor unit (X).
The processor (61) of the indoor control unit (60) controls the indoor unit (A) and the processor (71) of the heat storage control unit (70) controls the heat storage unit (Y). The outdoor unit (X) transmits and receives control signals between the processor (54) of the outdoor control unit (50) and the processor (61) of the indoor control unit (60).
The capacity control of the compressor (1) is performed.

On the other hand, during cold heat storage operation, the heat storage controller (8
The driving command means (81b) of (0) outputs a driving command signal. Specifically, in the invention according to claim 3, the driving time is set in the driving time setting means (81a), and the driving time setting means (8b) is set.
The operation command means (81b) outputs an operation command signal or a stop command signal to the heat storage control unit (70) corresponding to the set time of 1a). Then, the heat storage control unit (70) outputs the operation signal or the stop signal to the outdoor control unit (50) by the cold storage heat operating means (71a) corresponding to each of the command signals,
The outdoor control unit (50) drives and controls the compressor (1) and the like, and the heat storage control unit (70) controls the electric expansion valve (14) which is a switching mechanism of the heat storage unit (Y) and the like. Store cold heat in the unit (Y).

Further, when the cold storage heat operation switching means (74) is switched to the cold storage heat dedicated operation, the cold storage heat operating means (71a) of the heat storage control unit (70) causes the outdoor control unit (50) to perform only the cold storage heat operation. When a control signal is output and the mode is switched to the cooling / heat storage simultaneous operation, the cold storage heat operating means ((71a) is operated by the outdoor control unit (50) so that the indoor cooling and the cold storage are performed simultaneously.
And outputs a control signal to the heat storage unit (Y) for operation control.

In the invention according to claim 2, when the heat storage / heat storage operation changeover switch (75) is switched to the heating / heat storage simultaneous operation during the heating operation, the heat storage / heating operation means (71b) causes the electric expansion valve (of the heat storage unit (Y) ( 14) is controlled to store warm heat with the surplus capacity of indoor heating.

(Effect of the invention) Therefore, according to the invention of claim 1, the heat storage control unit (70) including the processor (71) for controlling the operation of the heat storage unit (Y) is separated from the outdoor control unit (50). Since the outdoor control unit (50) is provided as a dedicated control unit, the capacity of the outdoor control unit (50) can be reduced, so that the overall size of the device can be reduced, and the outdoor control unit (50) and the indoor control unit (60) can be reduced. It is possible to easily send and receive signals to and from.

Further, even if the operating range of the heat storage unit (Y) is expanded, the capacity of the outdoor control unit (50) is not likely to expand, so that it is possible to easily cope with the expansion of the operating range.

Further, since it is possible to switch between the cold heat storage dedicated operation and the cooling heat storage simultaneous operation, it is possible to expand the operation range.

Further, according to the invention of claim 2, since it is possible to switch to the heating and heat storage simultaneous operation during the heating operation, it is possible to effectively utilize the surplus heating capacity.

Further, according to the invention of claim 3, since the operating time setting means (81a) is provided, it is possible to automatically start and stop the cold storage heat operation at the set time, thereby improving the operability. be able to.

(Example) Hereinafter, the Example of this invention is described in detail based on drawing.

FIG. 2 shows the overall configuration of the refrigerant system in the heat storage air conditioner, which is a so-called multi-type air conditioner in which a plurality of indoor units (A, B, ...) Are connected to the outdoor unit (X). .

In the outdoor unit (X), (1) is a compressor,
(2) is a four-way switching valve that switches as shown by the solid line in the figure during cooling operation, and switches as shown by the broken line in the figure during heating operation, (3)
Is an outdoor heat exchanger that functions as a condenser during cooling operation and an evaporator during heating operation, (4) is an outdoor electric expansion valve that adjusts the refrigerant flow rate during cooling operation and reduces the refrigerant during heating operation, and (5) is A receiver for storing the condensed liquid refrigerant, and (8) is an accumulator for removing the liquid component in the suction refrigerant.

On the other hand, each indoor unit (A, B, ...) has the same structure,
(6) is an indoor electric expansion valve that functions as a decompression mechanism during cooling operation and adjusts the refrigerant flow rate during heating operation, and (7) is an indoor heat exchanger that functions as an evaporator during cooling operation and as a condenser during heating operation. is there.

The above-mentioned devices (1 to 8) are sequentially connected by a refrigerant pipe (9) so that the refrigerant can flow, and a main refrigerant having a heat pump function of releasing heat obtained by heat exchange with outdoor air to indoor air. A circuit (10) is constructed.

Further, the main refrigerant circuit (10) is connected to a heat storage unit (Y) for storing cold heat or warm heat by exchanging heat with the refrigerant or for utilizing the cold heat or warm heat. .

In the heat storage unit (Y), (11) is a heat storage tank that stores water (W) as a heat storage medium capable of storing cold heat and warm heat,
(12) is a heat storage heat exchanger arranged in the heat storage tank (11) for exchanging heat between water (W) and a refrigerant, and the heat storage heat exchanger (12) is a main refrigerant circuit ( The liquid line (9) between the outdoor electric expansion valve (4) and the indoor electric expansion valve (6) of 10).
a) to the first bypass path (13a) and the second bypass path (13)
It is connected by b) so that the refrigerant can flow.

Then, in the first bypass passage (13a), a heat storage electric expansion valve (1) that depressurizes the refrigerant when storing cold heat in the water (W).
4) is interposed, and the second bypass path (13b) has a second
A first opening / closing valve (15) for opening / closing the bypass path (13b) is provided.

Further, the first on-off valve (15) of the second bypass passage (13a)
− Intermediate piping between the heat storage heat exchanger (12) and the main refrigerant circuit (10)
Is connected to the gas line (9b) by a third bypass passage (13c) so that the refrigerant can flow therethrough, and the third bypass passage (13c) is provided with a second opening / closing valve for opening and closing the bypass passage (13c). (16) is installed.

On the other hand, between the two joints of the first and second bypass passages (13a, 13b) in the liquid line (9a) of the main refrigerant circuit (10), a flow rate control valve for variably adjusting the flow rate of the refrigerant. (1
7) is interposed, and the heat storage electric expansion valve (14), the first opening / closing valve (15), the second opening / closing valve (16), and the flow control valve (17) constitute a switching mechanism (14 to 17). ing.

The opening / closing or opening of each valve (2,4,6,14,15,16,17) is controlled by each control unit (50,60,70) described later, and the main refrigerant circuit (10) Is configured so that the circulation path of the refrigerant can be switched according to each operation mode. Further, during the cold storage heat recovery operation by the flow control valve (17), the first opening / closing valve (15) and the heat storage electric expansion valve (14). The refrigerant flow is divided into the second bypass path (13b) side and the liquid line (9a) side.

Further, the heat storage type air conditioner is provided with sensors, (T _hw ) is placed in the water of the heat storage tank (11), a water temperature sensor for detecting the water temperature T _w , and (T _hi ) is a liquid temperature sensor. A cooling inlet sensor disposed on the upstream side of the joint portion of the line (9a) with the second bypass passage (13b) during the cooling operation,
(T _ho ) is a cooling outlet sensor arranged downstream of the junction of the liquid line (9a) with the first bypass passage (13a) during cooling operation, and (Cl) is the water level in the heat storage tank (11). Water level sensor for detection, (T _h1 ) is room temperature sensor for detecting each room temperature, (T _h2 ) and (T _h3 ) are indoor heat exchangers (12, ...)
Indoor liquid temperature sensor and indoor gas temperature sensor to detect the temperature of the refrigerant in the liquid side and gas side piping of the, (T _h4 ) is the discharge pipe sensor to detect the discharge pipe temperature of the compressor (1), (T _h5 )
Is a defrost sensor that detects the frosting condition from the outlet temperature of the outdoor heat exchanger (6) during heating operation, and (T _h6 ) is located at the air intake port of the outdoor heat exchanger (6) and detects the intake air temperature. The outside air temperature sensor (SP) is a pressure sensor that detects the low pressure of the refrigerant pressure, that is, the saturation temperature Te corresponding to the evaporation pressure during the cooling operation, and the high temperature, that is, the saturation temperature Tc corresponding to the condensation pressure during the heating operation.

Then, the respective valves and sensors are connected to the outdoor control unit (50), the indoor control unit (60) and the heat storage control unit (70) by signal lines, as shown in FIGS. The outdoor control unit (50) is connected to each indoor control unit (60) and the heat storage control unit (70) by communication wiring so that control signals can be exchanged.

Then, as shown in FIG. 3, the indoor control unit (6
0) are connected in sequence, and the outdoor control unit (5
0), the plurality of indoor control units (60) and the heat storage control unit (70) constitute one control system corresponding to one refrigerant system. Furthermore, a plurality of control systems are provided corresponding to a plurality of refrigerant systems, and one heat storage control unit (70)
The heat storage controller (80) is connected to the heat storage control unit (70) and the heat storage control units (70) are connected in order.

FIG. 4 is an electric circuit diagram showing the wiring relationship between the inside of the outdoor control unit (50) arranged on the side of the outdoor unit (X) and the connected devices. In the figure, (MC) is a motor of the compressor (1) connected to the frequency conversion circuit (INV) of the inverter, (52C) is an electromagnetic contactor that operates the frequency conversion circuit (INV), and the above devices are fuses. Box (FS),
The outdoor control unit (50) is connected to the AC power supply (50a) via the earth leakage breaker (BR1), and is connected to the AC power supply (50a).
connected to a).

Further, (MF) is a fan motor for an outdoor fan, and (52F _H ) and (52F _L ) are electromagnetic contactors for operating the fan motor (MF), each of which is a single-phase component of the AC power supply (50a). When the electromagnetic contactor (52F _H ) is connected in parallel with the outdoor fan, the outdoor fan produces strong wind (standard air volume).
In addition, when the electromagnetic contactor (52F _L ) is in the connected state, it is possible to selectively switch the outdoor fan to a weak wind.

Then, in the interior of the outdoor control unit (50), normally open contact of the electromagnetic relay (RY ₁ to Ry ₄₎ are connected in parallel to the alternating current (50a), which in turn, the four-way switching Valve (2)
Electromagnetic relay (20S), frequency converter (INV) electromagnetic contactor (52C), outdoor fan electromagnetic contactor (52F _H , 52F _L )
Is connected in series to the coil of the above and is opened / closed according to the signals of the respective sensors (T _{h1 to} T _h6 ) input to the outdoor control unit (50) directly or via the indoor control unit (60, ...), The contact of each electromagnetic contactor or electromagnetic relay is opened and closed.

A coil of a pulse motor (EV ₁ ) that adjusts the opening degree of the outdoor electric expansion valve (4) is connected to the outdoor control unit (50). In the circuit on the right side of the figure, (C
H) is a heater for preventing oil forming of the compressor (1), which is connected in series with each electromagnetic contactor (52C) so that current flows when the compressor (1) is stopped. Furthermore, (51C) is the overcurrent relay of the motor (MC), and (5C
3C) is a switch for temperature rise protection of the compressor (1), (53
H) is a switch for pressure rise protection of the compressor (1), (51F)
Is a fan motor (MF) overcurrent relay, which is connected in series and constitutes a protection circuit that turns on the electromagnetic relay (30F _X ) at startup and turns it off in case of failure.

The outdoor control unit (50) has a built-in CPU (54) as a processor, and the CPU (54) is input from each indoor control unit (60), heat storage control unit (70) or each sensor. Driving operation means (54a) for controlling the operation of each device according to the signal is configured.

Next, FIG. 5 is an electric circuit diagram showing the main wiring of the inside of the indoor control unit (60) and each connected device. In the figure, (MF) is the motor for the indoor fan, which is a single-phase AC power supply (60
In response to a), the relay terminals (RY _{11 to} RY ₁₃ ) are used to switch between strong wind and weak wind in descending order of air volume, and a slight wind is generated only when stopped by the signal from the room temperature sensor (T _h1 ) during heating operation. There is. A pulse motor (EV ₂ ) for adjusting the opening of the indoor electric expansion valve (6) is connected to the printed circuit board of the indoor control unit (60), while the room temperature sensor (T _h1 ) and the temperature sensor (T _h2 ) are connected. , T _h3 ) signals are being input.

In addition, each indoor control unit (60) is connected to the outdoor control unit (50) via a signal line so that signals can be transmitted and received, and is also connected to the remote control switch (90) by a signal line. Then, the indoor control unit (60) has a built-in CPU (61) which is a processor,
The CPU (61) has a driving operation means (61a) for controlling the operation of the indoor electric expansion valve (6) or the indoor fan in response to signals from the respective sensors or the outdoor control unit (50).
Is configured.

Next, the heat storage control unit (70) characterized by the present invention
Will be described in detail.

As shown in FIG. 6, the heat storage control unit (70) is connected with a heat storage controller (80), and the heat storage unit (Y) is operated by a command signal from the heat storage controller (80).
Is configured to control driving.

The heat storage controller (80) is a CPU that is a processor.
A clock signal is input to the (81) from the clock circuit (82), and a transmission circuit (83) is connected to output a command signal to the heat storage control unit (70). Further, the CPU (81) is connected to an input section (84) for inputting a program for cold storage operation, etc., and the input section (84) sets the time, program setting for cold storage operation,
It is configured to input control data such as hour / minute setting, holiday setting, and program setting completion to the CPU (81). Further, an EEPROM (85) is connected to the CPU (81), and the EEPROM (85) is configured to store the operating state of the cold storage heat.

Furthermore, the CPU (81) includes an operation data storage means (8
1a) and the operation command means (81b) are configured, and the operation data storage means (81a) sets a predetermined cold storage heat operation time for each day based on the cold storage heat operation program set by the input section (84). The operation time setting means is configured to store the number of days, and for example, the cold storage heat operation time of each day from Sunday to Saturday is stored. The operation command means (81b) outputs the operation command signal to the heat storage control unit (10) at the operation time based on the storage data of the operation data storage means (81a) and at the operation stop time. Is configured.

The CPU (81) has one transmission block composed of 8 bits, and the one transmission block is, as shown in FIG.
Two bits are formed as an operation mode signal (S1), one bit is a program setting completion signal (S2), one bit is a time signal (S3), and four bits are a checksum signal (S4). The operation mode signal (S1) is set to "11" for cold storage prohibition mode, "10" for operation mode, "01" for trial operation mode, "00" for stop mode, and the operation command means (81b) Each mode signal is output.
When the program setting completion signal (S2) above is "0", setting is complete,
"1" indicates unset, and hourly signal (S3) is 1 from midnight
The checksum signal (S4) is configured to set a bit for a minute, and the checksum signal (S4) is configured to include the two's complement of the above-mentioned four bits.

The heat storage control unit (70) is connected to a power supply (70a) to be supplied with electric power, and also has a CPU (7
1) A receiving circuit (72a), a transmitting circuit (72b) and a transmitting / receiving circuit (73) are connected to each other, and a control signal is exchanged with the outdoor control unit (50) via the transmitting / receiving circuit (73). Is configured to.

In addition, the receiving circuit (72) of one heat storage control unit (70)
A heat storage controller (80) is connected to a), and a transmission circuit (72b) and a reception circuit (72a) are sequentially connected to the heat storage control unit (70) and each of the other heat storage control units (70), Each heat storage control unit (70) is configured to sequentially receive the output signal of the heat storage controller (80).

Further, the CPU (71) receives the detection signals of the water temperature sensor (T _hw ), the cooling inlet sensor (T _hi ), the cooling outlet sensor (T _ho ), and the water level sensor (Cl), and the heat storage electric motor. Expansion motor (14) and flow control valve (17) drive motors (EV
3, EV4) is configured to output a drive signal for drive control. In addition, the heat storage control unit (70) includes the electromagnetic relays (20R1, 20R) of the first and second opening / closing valves (15, 16).
2) and relay contacts (RY21, RY22) are connected to the power supply (70a).

Further, the heat storage control unit (70) is provided with a cold storage heat operation changeover switch (74) which is a cold storage heat operation changeover means and a heat storage heat operation changeover switch (75) which is a heat storage heat operation changeover means, A timer (76) is configured in the CPU (71).

The cold storage heat operation change-over switch (74) is configured to switch to either a cold storage heat exclusive operation for performing only the cold storage heat or a cooling heat simultaneous operation for simultaneously performing the cold storage heat and the indoor cooling during the cold storage heat operation. The exclusive operation signal and the simultaneous operation signal of the operation changeover switch (74) are input to the CPU (71).

The heat storage / heat storage operation changeover switch (75) is configured to switch between a normal heating operation for performing only indoor heating during a heating operation and a heating / heat storage simultaneous operation for simultaneously performing indoor heating and heat storage. The switching signal of the thermal operation switching switch (75) is input to the CPU (71).

The timer (76) is configured to start counting by a time signal output from the heat storage controller (80).

Further, the CPU (71) includes a cold storage heat operating means (71a) and a warm storage heat operating means (71b), and the cold storage heat operating means (71a) is output by the heat storage controller (80). The operation command signal and the stop command signal, that is, the operation mode signal (S1) of FIG. 7 is received, and the switching signal of the cold storage heat operation changeover switch (74) is received, and the outdoor control unit (50) and the control signal are received. Heat transfer electric expansion valve to exchange heat (14)
And so on.

The heat storage / heat operation means (71b) is configured to receive a switching signal of the heat storage / heat operation switching switch (75) and control the heat storage electric expansion valve (14) and the like.

That is, specifically, between the heat storage control unit (70) and the outdoor control unit (50), the CPU (71, 54) and the CPU (71, 54) receive the frequency command signal of the compressor (1) and the frequency signal currently in operation. While transmitting and receiving, the heat storage control unit (70) outputs an operation signal, a stop signal, an abnormal signal, etc., while an outdoor control unit (50) outputs an oil return signal, a pump down signal, an abnormal signal, etc. It is configured to control the warm storage operation.

Next, the opening / closing (or opening degree adjustment) of each valve and the circulation path of the refrigerant in each operation mode of the heat storage type air conditioner will be described.

First, during normal cooling operation, the four-way switching valve (2) is switched as shown by the solid line in FIG. 2, and the outdoor electric expansion valve (4), the flow control valve (17), and the indoor electric expansion valve (6) are With the other valves open, the refrigerant condensed in the outdoor heat exchanger (3) evaporates in the indoor heat exchangers (7) through the indoor electric expansion valves (6). Return to compressor (1).

During the cold storage heat operation, during the cold storage heat exclusive operation in which only the cold storage heat is performed, the outdoor electric expansion valve (4), the flow control valve (17), the heat storage electric expansion valve (14), and the second opening / closing valve (16) are opened, When the indoor electric expansion valve (6) and the first opening / closing valve (15) are closed, the liquid refrigerant condensed in the outdoor heat exchanger (3) is transferred from the first bypass passage (13a) to the heat storage electric expansion valve ( 14),
It circulates so as to evaporate in the heat storage heat exchanger (12) and return to the compressor (1) to store cold heat.

In the cold storage operation, the outdoor electric expansion valve (4), the flow control valve (17), and the indoor electric expansion are shown as indicated by the broken arrow in FIG. With the valve (6), the heat storage electric expansion valve (14), and the second opening / closing valve (16) open and the first opening / closing valve (15) closed,
A part of the liquid refrigerant condensed in the outdoor heat exchanger (3) evaporates in the indoor heat exchanger (7) via the indoor electric expansion valve (6), while the remaining liquid refrigerant remains in the first bypass path ( From 13a),
After passing through the heat storage electric expansion valve (14), it is evaporated in the heat storage heat exchanger (12), merges in the gas line (9b), and returns to the compressor (1).

During the cold storage heat recovery operation utilizing the cold heat stored in the cold storage heat operation, as shown by the solid arrow in FIG. 2, the outdoor electric expansion valve (4), the flow control valve (17), the indoor electric expansion valve (6 ,
...), the heat storage electric expansion valve (14), and the first opening / closing valve (15) are opened and the second opening / closing valve (16) is closed, and one of the liquid refrigerants condensed in the outdoor heat exchanger (3). Part flows through the second bypass passage (13b), is supercooled by the heat storage heat exchanger (12) and returns from the first bypass passage (13a) to the liquid line (9a),
The rest of the liquid refrigerant flows through the liquid line (9a) as it is, and after joining, passes through the indoor electric expansion valves (6), evaporates in the indoor heat exchangers (7), and returns to the compressor (1). At that time, the partial flow rate of the refrigerant is adjusted by adjusting the relative opening of the flow control valve (17) and the heat storage electric expansion valve (14), and the cooling inlet sensor (T _hi ) and the cooling outlet sensor (T _ho ) are used. The degree of supercooling of the refrigerant as the temperature difference ΔTl between the detected liquid refrigerant temperatures Tl ₁ and Tl ₂ is appropriately adjusted.

Next, in the normal heating operation, the four-way switching valve (2) is switched to the broken line side in FIG. 2, and each indoor electric expansion valve (6), the flow control valve (17), and the outdoor electric expansion valve (4). ) Is opened and all the other valves are closed, the liquid refrigerant condensed in each indoor heat exchanger (7) evaporates in the outdoor heat exchanger (3) via the outdoor electric expansion valve (4). Return to compressor (1).

At the time of simultaneous heating and heat storage simultaneous operation in which normal heating and stored heat are simultaneously performed, as shown by the alternate long and short dash line arrow in FIG. 2, each indoor electric expansion valve (6), the second on-off valve (16), the heat storage electric expansion valve ( 1
4), the flow control valve (17) and the outdoor electric expansion valve (4) are opened and the first opening / closing valve (15) is closed, and a part of the discharge gas is partially discharged from the gas line (9b) to the third bypass. While flowing through the path (13c) and condensing in the heat storage heat exchanger (12), the rest of the discharge gas flows through the gas line (9b) and condenses in each indoor heat exchanger (7), and after confluence, outdoor electric It passes through the expansion valve (4) and evaporates in the outdoor heat exchanger (3) and returns to the compressor (1).

Further, during the storage heat recovery defrost operation, the four-way switching valve (2) is switched to the solid line side in FIG. 2, and the outdoor electric expansion valve (4), the flow control valve (17), and each indoor electric expansion valve (6) ),
The heat storage electric expansion valve (14) and the second on-off valve (16) open,
The outdoor heat exchanger (3) with the first opening / closing valve (15) closed.
A part of the liquid refrigerant condensed in 1. passes through the heat storage electric expansion valve (14) from the first bypass passage (13a), and then the heat storage heat exchanger (12).
While the remaining part of the liquid refrigerant evaporates in each indoor heat exchanger (7, ...) After passing through each indoor electric expansion valve (6) and joins in the gas line (9b), and the compressor (1) Return to.

Next, each control unit (50, 60,
The control operation of 70) will be described.

First, the indoor control unit (60) and the outdoor control unit (5
0), the indoor control unit (60) is transmitting and receiving the operation signal and the like based on the operation signal and the stop signal of the cooling and heating operation and the set temperature signal input from the remote control switch (90). The CPU (61) controls the on / off of the indoor units (A, ...) And the indoor electric expansion valve (6) based on the temperature detected by the room temperature sensor (T _h1 ). The outdoor control unit (50) controls the frequency converter (INV) by the thermo-ON / OFF signal of the indoor control unit (60) to control the capacity of the compressor (1) and the outdoor electric expansion valve (4). Etc.

On the other hand, in the heat storage controller (80), a cold storage operation program is input from the input section (84), and a control signal indicating whether or not the setting of the operation program is completed is given at a predetermined timing with the heat storage control unit (70). Have been sent to.
That is, as shown in FIG. 7, the operation mode signal (S1), which is a command signal, is transmitted at a predetermined timing.
At 1:00 am, the operation mode signal (S1) is transmitted thereafter, while at 6:00 am, for example, the stop mode signal (S1) is transmitted instead of the operation mode signal.

And the CPU (71) of the heat storage control unit (70) is
When the operation control of the heat storage unit (Y) is performed based on the control signal of the heat storage controller (80), that is, when the program setting completion signal (S2) is "0" and the setting is completed, operation control can be started and the time signal (S3 ) Causes the timer (76) to start counting.

Further, during the cooling operation, the control for the exclusive cold storage operation or the simultaneous cooling and heat storage operation is controlled based on the switching signal of the cold storage heat operation changeover switch (74), and when the cold storage heat operation time comes, the operation mode which is a command signal The operation signal is output to the outdoor control unit (50) by the signal (S1). This operation signal causes the CPU (54) of the outdoor control unit (50) to
While controlling the drive of the compressor (1) and controlling the capacity, the heat storage control unit (70) controls the heat storage electric expansion valve (1
4) Control etc. according to the operation mode.

After that, when the stop mode signal (S19 is input to the heat storage control unit (80) from the CPU (81) of the heat storage controller (80), the heat storage control unit (80) sends a stop signal to the outdoor control unit (50). The output is performed and the heat storage electric expansion valve (14) is fully closed, and the outdoor control unit (50) is configured to stop the compressor (1).

By the operation control described above, cold heat is stored at a predetermined time of day, and cold heat such as ice is stored in the heat storage tank (11).

On the other hand, during heating operation, when the heat storage / heat storage operation changeover switch (75) of the heat storage control unit (70) is switched to heating / heat storage simultaneous operation, the heat storage control unit (70) switches the heat storage electric expansion valve (14) and the like. It controls and stores warm heat in the heat storage tank (11).

Therefore, since the heat storage control unit (70) that controls the operation of the heat storage unit (Y) is provided as a dedicated control unit separately from the outdoor control unit (50), the capacity of the outdoor control unit (50) can be reduced. Therefore, the size of the entire apparatus can be reduced, and signals can be easily exchanged between the outdoor control unit (50) and the indoor control unit (60).

Further, even if the control range of the heat storage unit (Y) is expanded, the capacity of the outdoor control unit (50) does not increase so much, so that it is possible to easily cope with the expansion of the operating range.

Further, since it is possible to switch between the cold heat storage dedicated operation and the cooling heat storage simultaneous operation, it is possible to expand the operation range.

Further, since it is possible to switch to the heating and heat storage simultaneous operation during the heating operation, it is possible to effectively use the surplus heating capacity.

Further, since the operation data storage means (81a) is provided, the cold storage heat operation can be automatically started and stopped at the set time, so that the operability can be improved.

In addition, although the present embodiment has been described with respect to the multi-type air conditioner, the present invention is not limited to the multi-type air conditioner, as long as it has a heat storage unit (Y), and the main refrigerant circuit (10) is also an embodiment. It is not limited to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of the present invention. 2 to 7 show an embodiment of the present invention, and FIG. 2 is a refrigerant circuit diagram showing a refrigerant system. 3 is a system diagram showing a control system, FIG. 4 is a circuit block diagram of an outdoor control unit, FIG. 5 is a circuit block diagram of an indoor control unit, and FIG. 6 is a circuit block diagram showing a heat storage control unit and a heat storage controller. , FIG. 7 is an explanatory diagram showing the contents of the output signal of the heat storage controller. (10) …… Main refrigerant circuit, (50) …… Outdoor control unit,
(54a) …… operation operation means, (60) …… indoor control unit, (70) …… heat storage control unit, (71a) …… cold heat operation means, (71b) …… heat storage heat operation means, (74 ) ... Cold storage heat operation changeover switch, (75) ... Warm heat storage operation changeover switch, (80) ... Heat storage controller, (81a) ... Operation data storage means, (81b) ... Operation command means, (A ) ...
… Indoor unit, (X) …… Outdoor unit, (Y) ……
Heat storage unit.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Horikawa 1304 Kanaoka-machi, Sakai City, Osaka Prefecture Daikin Industries, Ltd. Kanaoka Plant, Sakai Manufacturing Co., Ltd. (56) Reference JP-A-58-124138 (JP, A) JP-A-SHO 62-280551 (JP, A) Actual opening Sho 59-118938 (JP, U) Actual opening Sho 63-120052 (JP, U)

Claims (3)

[Claims] 1. An outdoor unit (X) and an indoor unit (A)
Are connected by a refrigerant pipe (9), and a heat storage unit (Y) having a heat storage medium capable of storing heat is connected by a refrigerant pipe (9) to form a main refrigerant circuit (10). (10) is a normal cooling operation in which normal cooling is performed, and the refrigerant is transferred from the outdoor unit (X) to the heat storage unit (Y).
Only the cold storage heat operation in which only the cold storage heat is stored in which the cold storage heat is stored in the heat storage unit (Y), and the refrigerant is transferred from the outdoor unit (X) to the heat storage unit (Y) and the indoor unit (A).
A switching mechanism (14 to 17) for switching the refrigerant circulation direction to the cooling heat storage simultaneous operation in which the cooling heat storage and the cooling are performed simultaneously is provided, while the control signal is processed to control the operation of the outdoor unit (X). Outdoor control unit (5 with processor (54)
0) and the outdoor control unit (50) are connected to the outdoor control unit (50) so as to send and receive control signals, and the control signals are processed to control the operation of the indoor unit (A). Indoor control unit (60) with a processor (61)
And a processor which is connected to the outdoor control unit (50) so as to exchange control signals with the outdoor control unit (50) and which processes the control signal to control the operation of the heat storage unit (Y). Heat storage control unit (70) with (71)
And a control data input section (84), the input section (84) being connected to process the control signal and output the control signal to the heat storage control unit (70). A heat storage controller (80) including a processor (81) connected to the heat storage controller (80) is provided, and the processor (81) of the heat storage controller (80) controls the heat storage control unit (70) to operate and stop cold heat storage. An operation command means (81b) for outputting a command signal is provided, and the processor (71) of the heat storage control unit (70) includes
A cold storage heat operation switching means (74) for outputting a dedicated operation signal and a simultaneous operation signal is connected so as to switch between the cold storage heat exclusive operation and the cooling heat storage simultaneous operation, and a processor (71) of the heat storage control unit (70). The operation command means (81
In response to the command signal of b), the operation signal and the stop signal for the cold storage heat are output to the outdoor control unit (50), and the switching mechanism (14 to 17) is switched and controlled during the operation of the cold storage heat to control the heat storage unit (Y). The cold storage heat operating means (71a) for controlling the operation of the outdoor control unit (50) is provided in the processor (54) of the outdoor control unit (50).
Operation of a heat storage type air conditioner characterized by comprising operation operation means (54a) for controlling the operation of the outdoor unit (X) by receiving the operation signal and the stop signal of the cold storage heat operation means (71a). Control device. 2. The operation control device for a heat storage type air conditioner according to claim 1, wherein the main refrigerant circuit (10) is configured to be capable of reversible operation between cooling operation and heating operation, and the main refrigerant circuit (10) is provided. The switching mechanism (14 to 17) is configured to be capable of switching the refrigerant flow direction so as to perform a normal heating operation in which normal heating is performed and a heating heat storage simultaneous operation in which warm heat is stored in the heat storage unit (Y) at the same time as heating is performed. On the other hand, the processor (71) of the heat storage control unit (70) is connected to the heat storage warming operation switching means (75) for switching between the normal heating operation and the heating heat simultaneous storage operation, and the heat storage control unit (70). ) Processor (71)
The heat storage unit (Y) is controlled by switching the switching mechanism (14 to 17) in response to the switching signal of the heat storage heat operation switching means (75).
An operation control device for a heat storage type air conditioner, which is provided with a heat storage / heat operation means (71b) for controlling the operation of the heat storage type air conditioner. 3. The operation control device for a heat storage type air conditioner according to claim 1 or 2, wherein the processor (81) of the heat storage controller (80) is operated by the operation command means (81b) corresponding to a set time. An operation control device for a heat storage type air conditioner, characterized in that an operation time setting means (81a) for setting the cold storage heat operation time of the heat storage unit (Y) is provided so as to output a command signal and a stop command signal. .