JPH0621700B2 - 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 a heat storage type air conditioner having a heat storage tank, and more particularly to a measure for improving the utilization efficiency of stored heat.

(Prior Art) Conventionally, as disclosed in, for example, Japanese Unexamined Patent Publication No. 59-208367, a refrigerant circuit connecting a compressor, an outdoor heat exchanger, a pressure reducing mechanism, and an indoor heat exchanger is provided, and the outdoor heat exchange is performed. A bypass path for temporarily bypassing the refrigerant circuit is provided in the liquid pipe between the heat exchanger and the indoor heat exchanger, and the heat exchange coil of the heat storage tank is provided in the bypass path, that is, the outdoor heat exchanger and the indoor heat exchanger. When the heat exchange coils are arranged in series, the heat exchange coils are used as an evaporator when the heating load is large and the heat exchange coils are used as a condenser when the heating load is small, depending on the heating load during the heating operation of the device. By doing so, it is known that the power consumption is reduced.

Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 61-125555, a heat exchange coil of a heat storage tank is provided in a bypass pipe that bypasses between a liquid pipe and a gas pipe of a refrigerant circuit similar to the above, that is, outdoors. By arranging heat exchange coils in parallel with the heat exchanger and the indoor heat exchanger, for example, during heating operation, the refrigerant condensed in the indoor heat exchanger is directly evaporated by the heat exchange coil to utilize the heat storage. Some are known to try to obtain high heating power.

(Problems to be solved by the invention) By the way, in the former one of the above-mentioned conventional ones, since the heat storage coil is arranged in series with the outdoor heat exchanger and the indoor heat exchanger, the indoor heat exchange is performed during the heating operation. The refrigerant is condensed by the heat exchange between the refrigerant and the heat storage medium once condensed in the container, and the condensation effect is small. Therefore, if an attempt is made to increase the effect of reducing power consumption by storing a large amount of warm heat in the heat storage medium in the heat storage tank, as in the latter case,
It is desirable to arrange the heat exchange coil in parallel with the outdoor heat exchanger and the indoor heat exchanger.

However, the heating capacity when using the heat storage coil is lower than the heating capacity when using the outdoor heat exchanger, such as when the stored heat in the heat storage tank is recovered and the evaporation capacity decreases due to the decrease in the heat storage amount. May be. In such a case, if the heat storage recovery operation is continued as it is, the feeling of air conditioning will be impaired.

The present invention has been made in view of these points, and an object thereof is to effectively use heat storage by providing a means for determining which heating capacity is higher between the heat storage recovery operation and the normal heating operation. Then, the utilization rate is improved.

(Means for Solving the Problem) To achieve the above object, the solution means of the present invention is, as shown in FIG. 1, a variable capacity compressor (1), an outdoor heat exchanger (3) and an indoor heat exchanger. Refrigerant circuit (10) connected to a container (6), heat storage tank (12) containing a heat storage medium capable of storing and heating heat, liquid pipe (8c) and gas pipe (8d) of the refrigerant circuit (10). ) Is installed in the bypass path (16) between
The heat exchange coil (13) for exchanging heat between the heat storage medium of the heat storage tank (12) and the refrigerant, and decompressing the refrigerant to the outdoor heat exchanger (3) and the heat exchange coil (13) during heating operation. It is premised on the heat storage type air conditioner provided with the pressure reducing mechanisms (4) and (17).

Then, as the operation control device of the air conditioner, during the heating operation, the normal circulation in which the refrigerant is circulated so that the refrigerant condensed in the indoor heat exchanger (6) is evaporated in the outdoor heat exchanger (3). The operation path and the heat storage recovery heating operation path in which the refrigerant condensed in the indoor heat exchanger (6) circulates so as to evaporate in the heat exchange coil (13) of the bypass path (16) are selectively switched. A connection switching mechanism (51), a room temperature detecting means (Th1) for detecting the indoor air temperature, an outside air temperature detecting means (Th2) for detecting the outside air temperature, and a heat storage temperature detecting means (Th3) for detecting the heat storage medium temperature. , The outside temperature detection means (Th2)
And a capacity ratio calculation means (53) for receiving the output of the heat storage temperature detection means (Th3) and calculating the capacity ratio of the normal heating capacity to the heat storage recovery heating capacity, and the room temperature detected by the room temperature detection means (Th1). Compressor based on temperature difference with temperature (1)
The capacity control means (22) for controlling the operating capacity of the compressor and the output of the capacity ratio computing means (53), and the capacity ratio is smaller than 1 and the capacity control rate of the compressor (1) during the heat storage recovery heating operation. In the following cases, the heat storage recovery heating operation is performed, and in other cases, the normal heating operation is performed, and the operation control means (54) for controlling the operation of the connection switching mechanism (51) is provided. is there.

As shown in FIG. 2, the second solving means is premised on the same air conditioner as the first solving means, and further, the same connection switching mechanism (5) as in the first solving means.
1), room temperature detection means (Th1), outside air temperature detection means (Th
2), heat storage temperature detection means (Th3), capacity ratio calculation means (5
3), the capacity control means (22) is provided. When the apparatus is in operation, it receives the heating capacity detecting means (P ₁ ) for detecting the heating capacity, the room temperature detecting means (Th 1), the heating capacity detecting means (P ₁ ) and the capacity ratio calculating means (53). In addition to the normal heating operation, the required heating capacity corresponding to room temperature is larger than the heating capacity when the outdoor heat exchanger (3) is used as an evaporator, and the capacity ratio is smaller than 1 and the heat storage recovery heating operation is performed. The operation control means (54) for switching and controlling the connection switching mechanism (51) so as to perform the heat storage recovery heating operation only when the capacity control rate of the compressor (1) at the time is less than or equal to the capacity control rate.

As shown in FIG. 2, the third solving means is premised on the same air conditioner as the first solving means, and further, the same connection switching mechanism (5) as in the first solving means.
1), room temperature detection means (Th1), outside air temperature detection means (Th
2), heat storage temperature detection means (Th3), capacity ratio calculation means (5
3), the capacity control means (22) is provided. When the apparatus is in operation, it receives the heating capacity detecting means (P ₁ ) for detecting the heating capacity, the room temperature detecting means (Th 1), the heating capacity detecting means (P ₁ ) and the capacity ratio calculating means (53). When the capacity ratio is smaller than 1, the heat storage recovery heating operation is performed, and when the capacity ratio is 1 or more and the capacity control of the operating capacity of the compressor (1) controlled by the capacity control means (22). If the rate is smaller than the above capacity ratio and the required heating capacity corresponding to room temperature is equal to or lower than the heating capacity when the outdoor heat exchanger (3) is used, the connection switching mechanism (so that the normal heating operation is performed in any case Operation control means (54) for switching control of 51) is provided.

(Operation) With the above configuration, in the invention of claim (1), the capacity ratio calculating means (53) causes the outdoor heat exchanger according to the outputs of the outside air temperature detecting means (Th2) and the accumulated heat temperature detecting means (Th3). The capacity ratio between the heating capacity when using (3) as an evaporator, that is, the normal heating capacity, and the heating capacity when using the heat exchange coil (13) as an evaporator, that is, the heat storage recovery heating operation capacity, is calculated and the operation is performed. The operation of the connection switching mechanism (51) is controlled by the control means (54), and when the capacity ratio is smaller than 1, that is, the heating capacity on the side using the outdoor heat exchanger (3) is the heat exchange coil ( 13) is used, and when the capacity ratio is smaller than 1 and the capacity ratio is larger than the capacity control rate of the compressor (1) by the capacity control means (22), the normal heating operation is performed. . Therefore, even when the heat storage of the heat storage tank (12) is low, or when the capacity control of the compressor (1) has a margin and there is not much difference between the normal heating capacity and the heat storage recovery heating capacity. There is no disadvantageous heat storage recovery operation. On the other hand, when the normal heating capacity is smaller than the heat storage recovery heating capacity and the operating capacity in the heat storage recovery heating operation is close to the maximum, the heat storage recovery heating operation using the high evaporation capacity on the heat storage side is performed. Therefore, an advantageous operation can be performed while preserving the heat storage without impairing the air conditioning effect, and the heat storage is effectively used.

Moreover, in order to determine whether to switch between the normal heating operation and the heat storage / recovery heating operation, only the capacity ratio needs to be calculated, so that the above-described operation can be obtained with a simple configuration.

Further, in the invention of claim (2), when the operation is started, the operation control means (54) controls the operation of the connection switching mechanism (51) so that the refrigerant condensed in the indoor heat exchanger (6) is heated outside the room. A normal heating operation is performed in which the circulation is performed so as to evaporate in the exchanger (3). At that time, the heating capacity detection means (P ₁ ) detects the heating capacity when the outdoor heat exchanger (3) is used,
The required heating capacity is detected based on the room temperature detected by the room temperature detecting means (Th1). When the heating capacity when the outdoor heat exchanger (3) is used is equal to or higher than the required heating capacity by the operation control means (54), the normal operation is continued as it is, so that the current outdoor heat exchanger (3) The heat can be saved without performing the heat storage recovery heating operation even when the capacity can sufficiently perform the predetermined heating operation, and thus, in addition to the effect of the invention of claim (1), more heat storage can be achieved. Effective use will be achieved.

Further, according to the invention of claim (3), when the operation is started, first, the heat storage recovery heating operation is performed, and the same control as described above is performed. Therefore, the same operation as that of the invention of claim (1) is performed. In addition to this, the heat storage recovery heating operation with high heating capacity allows the room in the low temperature state at the start of operation to quickly approach the set temperature.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings starting from FIG.

FIG. 3 shows the overall configuration of the air conditioner according to the embodiments of the inventions of claims (1) to (3), and one outdoor unit (A) has two units.
A so-called multi-type air conditioner in which two indoor units (B) and (C) are connected is configured. The outdoor unit (A) has a variable capacity compressor (1) driven by an inverter (not shown) so that the operating frequency is variable, and a solid line in the figure during heating operation and a broken line in the figure during cooling operation. The first four-way switching valve (2) that switches the connection as described above, the outdoor heat exchanger (3) that functions as a condenser during cooling operation and an evaporator during heating operation, and adjusts the refrigerant flow rate during cooling operation,
A first electric expansion valve (4) as a pressure reducing mechanism for depressurizing the refrigerant during heating operation, an accumulator (7) for separating the liquid refrigerant in the suction gas to the compressor (1), and storing the liquid refrigerant. And a receiver (9) are installed as main equipment. In addition, each indoor unit (B), (C)
Have the same configuration, the second electric expansion valve (5) that reduces the pressure of the refrigerant during the cooling operation and adjusts the flow rate of the refrigerant during the heating operation, and the indoor heat that serves as an evaporator during the cooling operation and a condenser during the heating operation. The exchanger (6) is arranged as the main equipment. The above-mentioned devices (1) to (7) and (9) are sequentially connected to each other through a refrigerant pipe (8) so that the refrigerant can flow, and become a refrigerant by heat exchange with air in the outdoor heat exchanger (3). A main refrigerant circuit (10) for applying the applied heat to the indoor air by the indoor heat exchanger (6) is configured.

On the other hand, the outdoor unit (A) and the indoor unit (B),
A heat storage unit (D) having a heat storage tank (12) containing water as a heat storage medium is disposed between the heat storage unit (D) and the heat storage medium (C). A first coil (13) as a heat exchange coil for exchanging heat with the medium inside the pipe and a second coil (1) for supercooling the refrigerant.
4) and are provided. In addition, the main refrigerant circuit (1
The first bypass passage (16) that bypasses the refrigerant in the refrigerant circuit (10) to the gas pipe (8d) side from the receiver (9) provided in the liquid pipe (8c) of 0) to the gas pipe (8d) side. A first coil (13) in the heat storage tank (12) is provided in the first bypass passage (16) in a branched manner, and between the first coil (13) and the liquid pipe (8c), First coil (1
A third electric expansion valve (17) is interposed as a pressure reducing mechanism for reducing the pressure of the refrigerant to 3).

Here, on the gas pipe (8d) side of the heat storage unit (D), a second four-way switching valve (19) is arranged in parallel with the first four-way switching valve (2), and the second Four-way switching valve (1
9), the gas pipe side end of the first bypass passage (16) is switchably connected to the discharge line (8a) and the suction line (8b) of the compressor (1).

The liquid pipe (8c) of the heat storage unit (D) is provided with a first electromagnetic opening / closing valve (11) for controlling opening / closing of the flow of the refrigerant in the liquid pipe (8c). Valve (11)
A second bypass passage (18) that bypasses the main refrigerant circuit (10) branches from both ends of the second bypass passage (18).
A second electromagnetic opening / closing valve for controlling opening / closing of the flow of the refrigerant and a second coil (14) of the heat storage tank (12) are provided in the. Then, during the cooling operation of the air conditioner, the first electromagnetic on-off valve (11) is closed, the second electromagnetic on-off valve (15) is opened, and the heat storage in the heat storage tank (12) is performed by the second coil (14). The cooling heat of the medium is applied to the refrigerant to supercool the refrigerant to increase the cooling capacity.

On the other hand, various sensors are arranged in the device, and (Th
1) is a room temperature sensor which is arranged in each indoor unit (B), (C) and serves as a room temperature detecting means for detecting the room air temperature from the temperature of the air sucked into the indoor heat exchanger (6). Room temperature Ta and set temperature T detected by the sensor (Th1)
The required capacity Tcs as the required heating capacity of the room is detected corresponding to the temperature difference (Ts-Ta) from s. In particular,
As shown in Table 1 on the next page, an example thereof is provided in a memory (not shown) incorporated in a controller (22), which will be described later, in which the difference temperature (Ts-Ta) between the set temperature Ts and the room temperature Ta is set to 1 ℃
For each step of the temperature difference set to the interval, the required capacity is converted into the condensation temperature Tcs in advance and stored.

Further, (Th2) is arranged at the air intake port of the outdoor heat exchanger (3), an outside air temperature sensor as an outside air temperature detecting means for detecting the outside air temperature To from the intake air temperature, and (Th3) is a heat storage tank (12). A water temperature sensor serving as a heat storage temperature detecting means for detecting a water temperature Tr which is a heat storage medium temperature, and which corresponds to detection values of these two sensors (Th2) and (Th3).
A capacity ratio R represented by a ratio Q ₁ / Q ₂ between the heating capacity of the outdoor heat exchanger (3), that is, the normal heating capacity Q ₁ and the heating capacity of the first coil (13), that is, the heat storage recovery heating capacity Q _2.
(= Q ₁ / Q ₂ ) is stored in advance in the storage device of the controller (22). Specifically, as shown in Table 2 on the previous page, one example is a two-dimensional table in which the value of the capacity ratio R is such that the outside air temperature To is the “vertical” parameter and the water temperature Tr is the “horizontal” parameter. Is set as.

Further, (P ₁ ) is attached to the discharge pipe (8a) of the compressor (1), and the heating capacity Tc1 and the heat exchange coil (1) when the outdoor heat exchanger (3) is used as an evaporator based on the high pressure value.
A high pressure sensor as a heating capacity detecting means for detecting a heating capacity Tc2 when 3) is used as an evaporator, wherein each of the sensors (Th1), (Th1), (Th2), (Th3) and (P ₁ Signal) is connected to a controller (22) for controlling the operation of the entire apparatus so that the signal can be input. The controller (22) uses the room temperature sensor (Th
1), (Th1) output, set temperature Ts and room temperature Ta
Comparing the heating capacity Tc as above and required capacity Tcs determined in Table 1, the condensation pressure corresponds saturation temperature detected by the high pressure sensor (P ₁₎ in response to the temperature difference (Ts -Ta) and The operating capacity of the compressor (1) is controlled so that Tc converges to Tcs, and it has a function as capacity control means.

Incidentally, (20) is a capillary tube provided between one connection port (19d) of the second four-way switching valve (19) and the suction line (8b), and (21a) to (21e).
Is a manual on-off valve provided at the inlet / outlet of the outdoor unit (A) of the refrigerant pipe (8).

The first, second and third electric expansion valves (4), (5),
(17) opening control, first and second solenoid on-off valves (11),
Connection switching for switching circuit connections according to operation modes such as heat storage operation for cooling and heating, heat storage recovery operation, etc. by switching control of opening and closing of (15) and switching of first and second four-way switching valves (2) and (19). A mechanism (51) is constructed.

The operation will be described below. As shown in FIG. 4, during the warming and warming operation in which warm heat is stored in the heat storage tank (12), as shown in FIG.
The four-way switching valves (2) and (19) are switched to the solid line side in the figure,
With the first and second electromagnetic on-off valves (11) and (15) closed, operation is performed while appropriately adjusting the opening degree of the first electric expansion valve (4). That is, the discharged gas flows from the second four-way switching valve (19) to the first bypass passage (16) side, is condensed in the first coil (13), and is then decompressed in the first electric expansion valve (4). It circulates so as to evaporate in the outdoor heat exchanger (3) (see the arrow in the figure) and heats the water, which is the heat storage medium in the heat storage tank (12), by heat exchange with the refrigerant in the first coil (13). Apply heat.

Further, during the normal heating operation, as shown in FIG. 5, all of the first and second four-way switching valves (2) and (19) are switched to the solid line side in the figure, and the first solenoid opening / closing valve ( 11) is opened and the second electromagnetic on-off valve (15) is closed, and the normal heating operation is performed. That is, the discharged refrigerant is the main refrigerant circuit (1
0), condensed in the guide heat exchanger (6), then decompressed in the first electric expansion valve (4), and circulated so as to evaporate in the outdoor heat exchanger (3) (see arrow in the figure). By doing
Each room in which each indoor unit (B), (C) is installed is heated. The third electric expansion valve (17) is closed during normal operation.

Then, during the heat storage recovery heating operation in which the heating operation is performed using the heat of the heat storage medium stored as described above, as shown in FIG. 6, the first, second four-way switching valves (2), (19) ) Are switched to the solid line side in the figure, the first electric expansion valve (4) is closed, and the first and second electromagnetic on-off valves (11) and (15) are opened and closed in the same state as in the normal heating operation. Thus, the operation is performed while appropriately adjusting the opening degree of the third electric expansion valve (17).
That is, the refrigerant condensed in the indoor heat exchangers (6), (6) bypasses the main refrigerant circuit (10) to the first bypass passage (16) side and flows, and is decompressed by the third electric expansion valve (17). The heat storage tank (1) is circulated so as to evaporate in the first coil (13) of the heat storage tank (12) (see the arrow in the figure).
Using the heat storage of 2), the low pressure of the compressor (1) is raised to improve the operation efficiency.

Next, the operation control performed by the controller (22) will be described.

FIG. 7 shows a control flow according to the inventions of claims (1) and (2). In step S ₁ , circuit connection is switched by the connection switching mechanism (51) to perform normal heating operation, and in step S ₂ , room temperature is reached. enter the Ta, calculates the required capacity Tcs based at step S ₃ from the chamber temperature value Ta in the first table. Then, the high pressure Tc is detected in step S ₄ , and step S ₅
Then, the value of this high pressure Tc, that is, the current heating capacity Tc and the required capacity Tcs are compared, and if Tc ≥Tcs, the heating capacity Tc when the current outdoor heat exchanger (3) is used is sufficient for heating operation. It is determined that the above can be performed, and the normal heating operation is continued as it is. Meanwhile, Tc <If Tcs, this state when performing normal operation due to an insufficient capacity is determined that there is a possibility that Sonzuru the air conditioning effect, firstly, the outside air temperature sensor (Th2) in step S ₆ and a water temperature sensor (Th3) enter the detection value, based on the second table in step S ₇ calculates the capacity ratio R between the ordinary heating capacity Q ₁ and the heat storage recovery heating capacity Q _2, or R <1 whether in step S ₈ If it is determined that R ≧ 1, it is determined that the air conditioning effect is deteriorated rather than the heat storage recovery heating operation, and the normal heating operation is performed. Further, if R <1, the heat storage recovery heating operation is performed in step S ₁₀ , and further, in step S ₁₁ , the ratio of the operating capacity of the compressor (1) controlled by the controller (22) to the maximum capacity, that is, The capacity control rate r is compared with the capacity R, and if r <R, in view of the balance between the control margin of the operating capacity of the compressor (1) and the normal heating capacity Q ₁ and the heat storage recovery heating capacity Q _2. It is determined that it is advantageous to perform the normal heating operation, and the process returns to step S ₁ to perform the normal heating operation, while if r ≧ R, it is determined that the heat storage recovery heating operation is advantageous.
Returning to step S ₆ , the heat storage recovery heating operation is performed.

In the above flow, the invention of claim (1), the above step S _7, the outer air temperature sensor (outside air temperature detection means) (Th2) and the heat storage temperature sensor (heat storage temperature detecting means)
A capacity ratio calculating means (5) that receives the output of (Th3) and calculates the capacity ratio R between the normal heating capacity Q ₁ and the heat storage recovery heating capacity Q _2.
3) is configured, and in steps S ₁ , S ₉ and S ₁₀ , the output of the capacity ratio calculating means (53) is received, the capacity ratio R is less than 1 and the capacity control rate r of the compressor (1) or less. In this case, the operation control means (54) for switching and controlling the connection switching mechanism (51) is configured to perform the heat storage recovery heating operation, and otherwise perform the normal heating operation.

Similarly, in the invention of claim (2), the step S ₇ constitutes the capacity ratio calculating means (53), and the steps S ₁ , S ₉ and S ₁₀ constitute the operation control means (54). .

Therefore, according to the invention of claim (1), the outside air temperature sensor (outside air temperature detecting means) (T
h2) and the heat storage temperature sensor (heat storage temperature detecting means (Th3) outputs the heating capacity of the outdoor heat exchanger (3), that is, the normal heating capacity Q ₁ and the heating capacity of the first coil (13), that is, the heat storage recovery heating. The capacity ratio R to the operating capacity Q ₂ is calculated, and the operation control means (54) controls the operation of the disconnecting / cumulating mechanism (51) so that the capacity ratio R is smaller than 1, that is, the outdoor heat exchanger ( When the heating capacity when 3) is used is larger than when the first coil (13) is used, the normal heating operation is performed, and therefore when the heat storage tank (12) has less heat storage. It does not impair the feeling of air conditioning by performing heat storage recovery heating operation which is disadvantageous to.

Further, even if the capacity ratio R is smaller than 1, that is, even if the heating capacity on the side of the first coil (13) is larger, the capacity ratio R is controlled by the controller (22) to the capacity control rate r of the compressor (1).
When it is larger than the above, the normal heating operation is performed without performing the heat storage recovery heating operation, so that there is a margin in the capacity control of the compressor (1), and the normal heating capacity Q ₁ and the heat storage recovery heating capacity Q ₂ are not so great. When the normal heating operation is advantageous, such as when there is no difference, the heat storage recovery operation is switched to the normal heating operation.

On the other hand, when the normal heating capacity Q ₁ is smaller than the heat storage recovery heating capacity Q ₂ and the operating capacity is close to the maximum, that is, when r ≧ R in the above flow, the outdoor heat exchanger (3) has a predetermined capacity. Although there is a possibility that the control cannot be performed, in such a case, since the heat storage recovery heating operation using the high evaporation capacity of the first coil (13) is performed, a good feeling of air conditioning can be maintained. . Therefore, an advantageous operation can be performed while preserving the heat storage, and the heat storage is effectively used.

In addition, the above case has the following advantages. That is, when determining whether to switch between the normal heating operation and the heat storage recovery heating operation, the temperature difference between the set temperature Ts and the room temperature Ta (Ts-Ta
) Required heating load Q _D and room temperature Ta
And normal heating capacity Q ₁ with outside temperature To as a parameter
If, previously stored and heat storage recovery heating capacity Q ₂ to which the parameters room temperature T _a and the heat storage temperature Tr, respectively, based on the stored contents of each of the heating operation heating capacity Q _1, Q ₂ and the required load Although it is possible to compare Q _D , in the present invention, since it is only necessary to store the capacity ratio R, the above effect can be obtained with a simpler configuration.

Further, in the invention of claim (2), when the operation is started, the operation control means (54) controls the connection switching mechanism (51),
A normal heating operation is performed in which the refrigerant condensed in the indoor heat exchanger (6) circulates so as to evaporate in the outdoor heat exchanger (3). At that time, high-voltage sensor (heating capacity detection means)
(P ₁ ) detects the heating capacity Tc1 when the outdoor heat exchanger (3) is used, and the room temperature sensor (room temperature detecting means) (T
Based on Table 1 above, the total required capacity Tcs is determined for the room temperature Ta detected by h1) and (Th1). And
When the heating capacity Tc1 is equal to or higher than the required capacity Tcs by the operation control means (54), the normal operation is continued as it is, so that the current capacity of the outdoor heat exchanger (3) can sufficiently perform the predetermined heating operation. Up to the above, the heat storage can be preserved without performing the heat storage recovery heating operation.

On the other hand, when the heating capacity Tc is smaller than the required capacity Tcs, the same comparison of the capacity ratio R and the capacity control rate r as in the invention of claim (1) is performed. Therefore, the invention of claim (1) is performed. It is possible to obtain the same effect as the above. Therefore, in addition to the same effect as the invention of claim (1), it is possible to further effectively utilize the heat storage.

In the above embodiment, the single high pressure sensor (P ₁ ) is arranged as the heating capacity detecting means, but the outdoor heat exchanger (3) is used.
Side and the first coil side may be separately arranged, and instead of the high pressure sensor (P ₁ ), a low pressure sensor may be arranged to detect the evaporation capacity at a saturation temperature equivalent to the evaporation pressure and calculate the heating capacity. Good. In the case of the above embodiment, there is an advantage that the high pressure sensor (P ₁ ) can be used for the capacity control.

Further, instead of the two pressure reducing mechanisms (4) and (17), a liquid pipe (8c) between the receiver (9) and the outdoor heat exchanger (3).
It is also possible to connect the first bypass passage (16) to and to arrange a single electric expansion valve or the like in the liquid pipe (8c) between the connecting portion and the receiver (9). Next, the control of the invention of claim (3) will be described based on the flowchart of FIG.
After performing the same control as steps S _{6 to} S ₁₁ in the flow of FIG. 7 in steps S _{21 to} S ₂₆ , steps S ₂₇ to S ₂₇
In S ₃₁ , steps S _{1 to} S ₅ in the flow of FIG. 7 are performed.
Same control as. That is, in the control shown in FIG. 7, the normal heating operation is first performed at the start of operation, whereas
In this embodiment, the heat storage recovery heating operation is performed.

In the above flow, step S ₂₂ constitutes the capacity date calculating means (53), and steps S ₂ , S ₂₅ and S ₂₇ constitute the operation control means (54).

Also in the invention of claim (3), the basic operation is the same as that of the invention of claim 2 above, but at the start of normal operation, the heat storage in the heat storage tank (12) is in an unused state, and R In most cases, it is <1. Therefore, in that case, the heat storage recovery heating operation is started at the start of operation, and by utilizing the evaporation capacity of high heat storage, there is an advantage that the room in the low temperature state at the start of operation can be brought close to the set temperature quickly. is there.

(Effect of the invention) As described above, according to the invention of claim (1), the heat exchange coil of the heat storage tank is arranged in parallel with the outdoor heat exchanger of the refrigerant circuit, and the normal heating operation and the heat storage recovery are performed. During heating operation of the air conditioner that can be switched to heating operation, the operating capacity of the compressor is controlled based on the temperature difference between the set temperature and room temperature, and the normal heating capacity and heat storage recovery are performed from the outside air temperature and the heat storage medium temperature. Since the capacity ratio with the heating capacity is calculated, the operation switching between the normal heating operation and the heat storage recovery heating operation is determined based on the value of the capacity ratio and the magnitude relationship between the capacity ratio and the capacity control rate. With a simple configuration, it is possible to improve the utilization efficiency of heat storage while maintaining a good feeling of air conditioning.

According to the invention of claim (2), at the start of operation, first, the normal heating operation is performed, and after comparing the normal heating capacity and the indoor required capacity at that time, the capacity of the outdoor heat exchanger is insufficient. In this case, since the control of the invention of claim (1) is executed, in addition to the same effect as the invention of claim (1), it is possible to further effectively use the heat storage.

Further, according to the invention of claim (3), at the start of operation, first,
The above claim by performing a heat storage recovery heating operation with high heating capacity.
Since the same control as in the invention of (1) is performed, it is possible to obtain the effect of quickly reaching the set temperature in the room at the start of operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of the invention of claim (1), and FIG. 2 is a block diagram showing the configuration of the invention of claims (2) and (3). 3 to 6 show an embodiment of the invention of claims (1) to (3), FIG. 3 is a refrigerant system diagram showing the entire configuration thereof, and FIGS. 4 to 6 are heat storage operation in order, The figure which shows each operation mode of normal heating operation and heat storage heating operation, FIG. 7 is a flowchart figure which shows the control content of invention of Claim (1) and (2), and FIG. 8 is invention of Claim (3). It is a flowchart figure which shows the control content of. (1) ... Compressor, (3) ... Outdoor heat exchanger, (4) ...
... 1st electric expansion valve (pressure reducing mechanism), (6) ... indoor heat exchanger, (8c) ... liquid pipe, (8d) ... gas pipe, (10)
...... Main refrigerant circuit, (12) ...... Heat storage tank, (13) ...... First coil (heat exchange coil), (16) ...... First bypass passage, (17) ...... Third electric expansion valve (pressure reduction) Mechanism), (2
2) ... controller (capacity control means), (51) ...
Connection switching mechanism, (53) ... Capacity ratio calculation means, (54)
...... Operation control means, (P ₁ ) ...... High pressure sensor (heating capacity detection means), (Th1) ...... Room temperature sensor (room temperature detection means), (Th2) ...... Outside air temperature sensor (outside air temperature detection means),
(Th3) ... Water temperature sensor (heat storage temperature detection means).

Claims (3)

[Claims] 1. A refrigerant circuit (10) formed by connecting a variable capacity compressor (1), an outdoor heat exchanger (3) and an indoor heat exchanger (6) and a heat storage medium capable of storing and heating heat. And a bypass path (16) between the heat storage tank (12) and the liquid pipe (8c) and the gas pipe (8d) of the refrigerant circuit (10),
The heat exchange coil (13) for exchanging heat between the heat storage medium of the heat storage tank (12) and the refrigerant, and decompressing the refrigerant to the outdoor heat exchanger (3) and the heat exchange coil (13) during heating operation. In the heat storage type air conditioner equipped with the pressure reducing mechanisms (4) and (17), the refrigerant condensed during the indoor heat exchanger (6) is circulated in the outdoor heat exchanger (3) during the heating operation. The path of the normal heating operation that circulates so as to evaporate, and the refrigerant condensed in the indoor heat exchanger (6), the heat exchange coil (1) of the bypass path (16).
3) The connection switching mechanism (51) that selectively switches to the heat storage recovery heating operation route that circulates so as to evaporate, the room temperature detecting means (Th1) that detects the indoor air temperature, and the outside that detects the outside air temperature. Air temperature detection means (Th2), heat storage temperature detection means (Th3) for detecting heat storage medium temperature, the outside air temperature detection means (Th2) and heat storage temperature detection means (T
h3) output, the capacity ratio calculating means (53) for calculating the capacity ratio of the normal heating capacity to the heat storage recovery heating capacity, and the temperature difference between the room temperature and the set temperature detected by the room temperature detecting means (Th1). Based on the outputs of the capacity control means (22) for controlling the operating capacity of the compressor (1) and the capacity ratio calculation means (53), the capacity ratio is 1
Connection switching mechanism (51) so as to perform the heat storage recovery heating operation when the capacity control rate of the compressor (1) during the heat storage recovery heating operation is less than or equal to the capacity control rate, and otherwise perform the normal heating operation. And an operation control means (54) for controlling the operation of the heat storage type air conditioner. 2. A refrigerant circuit (10) comprising a variable capacity compressor (1), an outdoor heat exchanger (3) and an indoor heat exchanger (6), and a heat storage medium capable of storing and heating heat. And a bypass path (16) between the heat storage tank (12) and the liquid pipe (8c) and the gas pipe (8d) of the refrigerant circuit (10),
The heat exchange coil (13) for exchanging heat between the heat storage medium of the heat storage tank (12) and the refrigerant, and decompressing the refrigerant to the outdoor heat exchanger (3) and the heat exchange coil (13) during heating operation. In the heat storage type air conditioner equipped with the pressure reducing mechanisms (4) and (17), the refrigerant condensed during the indoor heat exchanger (6) is circulated in the outdoor heat exchanger (3) during the heating operation. The path of the normal heating operation that circulates so as to evaporate, and the refrigerant condensed in the indoor heat exchanger (6), the heat exchange coil (1) of the bypass path (16).
3) The connection switching mechanism (51) that selectively switches to the heat storage recovery heating operation route that circulates so as to evaporate, the room temperature detecting means (Th1) that detects the indoor air temperature, and the outside that detects the outside air temperature. Air temperature detection means (Th2), heat storage temperature detection means (Th3) for detecting heat storage medium temperature, the outside air temperature detection means (Th2) and heat storage temperature detection means (T
h3) output, the capacity ratio calculating means (53) for calculating the capacity ratio of the normal heating capacity to the heat storage recovery heating capacity, and the temperature difference between the room temperature and the set temperature detected by the room temperature detecting means (Th1). A capacity control means (22) for controlling the operating capacity of the compressor (1) based on the above, a heating capacity detecting means (P ₁ ) for detecting a heating capacity during operation of the device, the room temperature detecting means (Th 1), a heating capacity. Detection means (P ₁ )
And the output of the capacity ratio calculation means (53), the heat storage recovery heating operation is performed at the start of operation, and when the capacity ratio is 1 or more, the capacity ratio is larger than the capacity control rate, and the request corresponds to room temperature. When the heating capacity is smaller than the heating capacity when the outdoor heat exchanger (3) is used as an evaporator, the operation control means (54) for switching and controlling the connection switching mechanism (51) so as to perform the normal heating operation. An operation control device for a heat storage type air conditioner, comprising: 3. A refrigerant circuit (10) formed by connecting a variable capacity compressor (1), an outdoor heat exchanger (3) and an indoor heat exchanger (6) and a heat storage medium capable of storing and heating heat. And a bypass path (16) between the heat storage tank (12) and the liquid pipe (8c) and the gas pipe (8d) of the refrigerant circuit (10),
The heat exchange coil (13) for exchanging heat between the heat storage medium of the heat storage tank (12) and the refrigerant, and decompressing the refrigerant to the outdoor heat exchanger (3) and the heat exchange coil (13) during heating operation. In the heat storage type air conditioner equipped with the pressure reducing mechanisms (4) and (17), the refrigerant condensed during the indoor heat exchanger (6) is circulated in the outdoor heat exchanger (3) during the heating operation. The path of the normal heating operation that circulates so as to evaporate, and the refrigerant condensed in the indoor heat exchanger (6), the heat exchange coil (1) of the bypass path (16).
3) The connection switching mechanism (51) that selectively switches to the heat storage recovery heating operation route that circulates so as to evaporate, the room temperature detecting means (Th1) that detects the indoor air temperature, and the outside that detects the outside air temperature. Air temperature detection means (Th2), heat storage temperature detection means (Th3) for detecting heat storage medium temperature, the outside air temperature detection means (Th2) and heat storage temperature detection means (T
h3) output, the capacity ratio calculating means (53) for calculating the capacity ratio of the normal heating capacity to the heat storage recovery heating capacity, and the temperature difference between the room temperature and the set temperature detected by the room temperature detecting means (Th1). A capacity control means (22) for controlling the operating capacity of the compressor (1) based on the above, a heating capacity detecting means (P ₁ ) for detecting a heating capacity during operation of the device, the room temperature detecting means (Th 1), a heating capacity. Detection means (P ₁ )
And the output of the capacity ratio calculation means (53), when the capacity ratio is smaller than 1, the heat storage recovery heating operation is performed, and when the capacity ratio is 1 or more and the capacity control means (2).
The capacity control rate of the operating capacity of the compressor (1) controlled in 2) is smaller than the capacity ratio, and the required heating capacity corresponding to room temperature is the heating capacity when the outdoor heat exchanger (3) is used as an evaporator. And an operation control means (54) for controlling the operation of the connection switching mechanism (51) so as to perform the normal heating operation in any of the following cases. .