JPH07117261B2 - 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,
In particular, it relates to measures for expanding the continuous operation range of the compressor during cold storage and simultaneous cooling operation.

(Prior Art) Conventionally, as proposed in, for example, Japanese Patent Laid-Open No. 64-10068, it has a refrigerant circuit in which a compressor, a heat source side heat exchanger, a main pressure reducing mechanism, and a use side heat exchanger are sequentially connected. In the air conditioner, a heat storage tank that stores a heat storage medium capable of storing heat by exchanging heat with the refrigerant, a heat storage heat exchanger for evaporating the refrigerant to cool the heat storage medium, and a pressure reducing mechanism for cold storage are arranged, When the electricity charge is low at night, etc., the heat storage heat exchanger exchanges heat with the refrigerant to store cold heat, and the cold heat is taken out during the daytime to be used for cooling operation to reduce power consumption. The heat storage type air conditioner to be tried is a known technique.

(Problems to be solved by the invention) By the way, in the above conventional heat storage type air conditioner, when the demand for cooling on the indoor side becomes small during the daytime cooling operation, the heat storage heat exchange is performed at the same time while performing the cooling operation. Use the capacity of the heat exchanger on the heat source side to effectively store the cold heat by allowing the refrigerant to evaporate, that is, to perform the cold storage and the simultaneous cooling operation, and use the cold heat when there is a large demand for cooling. It is possible to further improve the power reduction effect.

On the other hand, since such a heat storage type air conditioner is premised on the use of heat storage for air conditioning, the indoor capacity is designed to be larger than the outdoor capacity. During the simultaneous cold storage and cooling operation as described above, the evaporation capacity on the heat storage heat exchanger side is further added to the evaporation capacity on the indoor side, so that the evaporation capacity has a much larger margin than the condensation capacity. Therefore, during the simultaneous cold storage and cooling operation, when the evaporation capacity of the heat storage heat exchanger increases due to the temperature increase of the heat storage medium and the condensation capacity decreases due to the increase of the outside air temperature at the same time, the evaporation of the entire apparatus evaporates. The ability balance between ability and condensing ability cannot be maintained,
As a result, there is a risk that the high pressure will rise excessively due to insufficient condensation capacity and the compressor will stop abnormally due to the high pressure cut.

The present invention has been made in view of such a point, and an object thereof is to reduce the high pressure when there is a possibility that the condensation capacity is insufficient with respect to the evaporation capacity during the cool storage and the simultaneous cooling operation of the heat storage type air conditioner. By taking measures to prevent the excessive rise of the compressor, the abnormal stop of the compressor is avoided and the continuous operation range is expanded.

(Means for Solving the Problem) In order to achieve the above object, the solving means of the present invention reduces the evaporation ability of the entire apparatus when both the heat storage medium temperature and the outside air temperature rise above a predetermined set value. Especially.

Specifically, the first solution is, as shown in FIG. 1A,
Compressor (1), heat source side heat exchanger (3), pressure reducing mechanism (6)
And a heat storage tank (11) for accommodating a refrigerant circuit (10) in which the use side heat exchanger (7) is sequentially connected, and a heat storage medium capable of storing heat by exchanging heat with the refrigerant in the refrigerant circuit (10). And a heat storage heat exchanger (12) for exchanging heat between the heat storage medium of the heat storage tank (11) and the refrigerant, and the heat storage heat exchanger (12) during cold storage operation for storing cold heat in the heat storage tank (11). It is premised on a heat storage type air conditioner equipped with a cold storage pressure reducing valve (14) capable of adjusting the opening degree for depressurizing the refrigerant to the air.

Then, as an operation control device of the air conditioner, heat storage medium temperature detecting means (Thw) for detecting the temperature of the heat storage medium.
And the outside air temperature detection means (Tha) for detecting the outdoor air temperature
And, during the simultaneous cold storage and cooling operation, receiving the outputs of the heat storage medium temperature detection means (Thw) and the outside air temperature detection means (Tha),
When both the heat storage medium temperature and the outdoor air temperature are equal to or higher than a predetermined set value, the operation control means (51A) for controlling the use side heat exchanger (7) to forcibly bring it into the thermo-off state while continuing the cold storage. And is provided.

The second solution means, as shown in FIG. 1B, comprises a compressor (1), a heat source side heat exchanger (3), a pressure reducing mechanism (6) and a utilization side heat exchanger (7), which are sequentially connected. Refrigerant circuit (10)
And a heat storage tank (11) having a heat storage medium capable of storing heat by exchanging heat with the refrigerant in the refrigerant circuit (10), and the heat storage tank (11)
Storage heat exchanger (12) for exchanging heat between the heat storage medium and the refrigerant
And a heat storage type air conditioner including a heat storage pressure reducing valve (14) capable of adjusting the opening degree for reducing the pressure of the refrigerant to the heat storage heat exchanger (12) during a cold storage operation for storing cold heat in the heat storage tank (11). Based on the device, as an operation control device of the air conditioner, a heat storage medium temperature detecting means (Thw) for detecting the temperature of the heat storage medium,
Outdoor air temperature detection means (Tha) for detecting the outdoor air temperature,
During the simultaneous cold storage and cooling operation, when the outputs of the heat storage medium temperature detection means (Thw) and the outside air temperature detection means (Tha) are received and both the heat storage medium temperature and the outdoor air temperature are equal to or higher than a predetermined set value, the cold storage is performed. The operation control means (51B) for controlling the opening degree of the pressure reducing valve (14) to be limited to a predetermined opening degree or less.

A third solution means, as shown in FIG. 1C, is a compressor (1), a heat source side heat exchanger (3), a use side pressure reducing valve (6) with adjustable opening, and a use side heat exchanger ( A heat storage tank (1) having a refrigerant circuit (10) formed by sequentially connecting 7) and a heat storage medium capable of storing heat by heat exchange with the refrigerant in the refrigerant circuit (10).
1), a heat storage heat exchanger (12) for exchanging heat between the heat storage medium of the heat storage tank (11) and a refrigerant, and an opening degree for depressurizing the refrigerant to the heat storage heat exchanger (12) during cold storage operation. Assuming a heat storage type air conditioner equipped with an adjustable cold storage pressure reducing valve (14),
As an operation control device of an air conditioner, a heat storage medium temperature detecting means (Thw) for detecting the temperature of the heat storage medium, an outside air temperature detecting means (Tha) for detecting an outdoor air temperature, and a cool storage and cooling simultaneous operation, the above Heat storage medium temperature detection means (Thw)
According to the output of the outside air temperature detecting means (Tha), the higher the heat storage medium temperature or the outdoor air temperature, the smaller the maximum opening degree of the use-side pressure reducing valve (6) and the cold energy reducing valve (14). The operation control means (51C) is provided.

(Operation) According to the invention of claim (1), the heat storage medium temperature in the heat storage tank (11) detected by the heat storage medium temperature detecting means (Thw) during the simultaneous cold storage and cooling operation of the air conditioner Increase in cold storage capacity due to increase in
Due to the decrease in the capacity of the heat source side heat exchanger (3) due to the rise in the outside air temperature detected in a), the capacity balance between the evaporation capacity and the condensation capacity is disrupted, and the condensation capacity is insufficient, causing compression due to excessive rise in high pressure. When there is a risk that the machine (1) will stop abnormally, the operation control means (51A) controls the use side heat exchanger (7) to be in the forced thermo-off state, so that the evaporation capacity decreases and the capacity decreases. It will be corrected to restore balance. Therefore, while the cold storage is connected, the abnormal stop of the compressor (1) due to the excessive rise of the high pressure is prevented.

According to the invention of claim (2), during the simultaneous cold storage and cooling operation, the heat storage medium temperature and the outdoor temperature rise, the capacity balance between the evaporation capacity and the condensation capacity collapses, and the condensation capacity becomes insufficient, so that the high pressure rises excessively. If there is a risk that the compressor (1) will abnormally stop, the operation control means (51B) limits the maximum opening degree of the cold storage pressure reducing valve (14) to a predetermined opening degree or less.
The evaporation capacity will be reduced and the capacity balance will be restored, and the abnormal stoppage of the compressor (1) will be prevented in advance while maintaining the comfort of the air conditioning feeling due to the normal thermo-on-permitted operation indoors. become.

In the invention of claim (3), during the simultaneous cold storage and cooling operation, the capacity balance between the evaporation capacity and the condensation capacity is disrupted, and the condensation capacity becomes insufficient, so that the high pressure rises excessively and the compressor (1) abnormally stops. When there is a fear, the operation control means (51C) limits the maximum opening values of the main pressure reducing valve (6) and the cold accumulating pressure reducing valve (14) to a smaller value as the water temperature or the outside air temperature increases. Therefore, the cooling capacity and the cold storage capacity are reduced in accordance with the ratio determined by various conditions such as the required capacity, the liquid refrigerant temperature, and the refrigerant circulation amount, so that the total evaporation capacity is reduced and The abnormal stop of the compressor (1) is prevented in advance while continuing the cold storage and the simultaneous cooling operation adapted to the cold storage utilization plan.

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

FIG. 2 shows the overall configuration of the air conditioner according to the first embodiment, in which a plurality of indoor units (A), (B), ... Are connected to the outdoor unit (X), a so-called multi-type air conditioner. It is a device.

In the outdoor unit (X), (1) is a compressor,
(2) is a four-way switching valve that switches during cooling operation as shown by the solid line in the figure and during heating operation as shown by the broken line in the figure.
(3) is an outdoor heat exchanger as a heat source side heat exchanger that functions as a condenser during cooling operation and as an evaporator during heating operation, and (4) adjusts the refrigerant flow rate during cooling operation and reduces the refrigerant during heating operation. An outdoor electric expansion valve functioning as a pressure reducing mechanism, (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, the indoor units (A), (B), ... Have the same configuration, and (6) functions as a pressure reducing mechanism during the cooling operation,
Indoor electric expansion valve that adjusts the refrigerant flow rate during heating operation,
Reference numeral (7) is an indoor heat exchanger as a utilization side heat exchanger that is provided with an indoor fan (7a) and functions as an evaporator during cooling operation and as a condenser during heating operation.

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

In addition, a heat storage unit (Y) is arranged in the device to store or heat the heat by exchanging heat with the refrigerant flowing through the main refrigerant circuit (10) or to use the cold heat or the warm heat. In the heat storage unit (Y), (11) is a heat storage heat exchanger for arranging heat storage of cold heat and warm heat, and for exchanging heat between water (W) and a refrigerant, the heat storage heat exchanger ( 12)
And the liquid line (9a) between the outdoor electric expansion valve (4) and the indoor electric expansion valve (6) of the main refrigerant circuit (10), a first branch pipe (13a) and a second branch pipe (13b). ), The refrigerant is communicatably connected in order from the indoor electric expansion valve (6) side. The first branch pipe (13a) is provided with a heat storage electric expansion valve (14) as a cold storage pressure-reducing mechanism that reduces the pressure of the refrigerant when cold water is stored in the water (W). A first opening / closing valve (15) for opening and closing the second branch pipe (13b) is provided in (13b).

Further, the intermediate pipe between the first on-off valve (15) and the heat storage heat exchanger (12) of the second branch pipe (13a) and the gas line (9b) of the main refrigerant circuit (10) are connected to the third branch pipe ( The second branch valve (16) for opening and closing the branch pipe (13c) is connected to the third branch pipe (13c) so that the refrigerant can flow therethrough.

On the other hand, between the two joints of the liquid line (9a) of the main refrigerant circuit (10) with the first and second branch pipes (13a) and (13b), the flow rate of the refrigerant is variably adjusted. A flow control valve (17) is provided.

That is, the above valves (2), (4), (6) (14),
By opening / closing (15), (16), (17) or adjusting the opening, the refrigerant circulation path is switched according to each operation mode. The flow control valve (17), the first opening / closing valve (15), and the heat storage electric expansion valve (14) allow the flow of the refrigerant during the cold storage and cooling operation to flow toward the second branch pipe (13b) side and the main refrigerant circuit (10). ) Side.

Further, sensors are arranged in the device, (Thw) is arranged in the water of the cold storage tank (11), a water temperature sensor as a heat storage medium detecting means for detecting the water temperature Tw, and (Tha) is outdoor heat exchange. An outside air temperature sensor, which is arranged at the air intake port of the device (3) and serves as an outside air temperature detecting means for detecting the outside air temperature Ta, (Th
i) is a cooling inlet sensor disposed on the upstream side of the joint portion of the liquid line (9a) with the second branch pipe (13b) during the cooling operation, and (Tho) is the first branch pipe of the liquid line (9a) ( 13a) is a cooling outlet sensor arranged on the downstream side during cooling operation of the joint, (Ths) is arranged in the suction line (9d), and a suction pipe sensor for detecting the suction pipe temperature, (Sp) is It is placed in the gas line (9d) and has a high pressure Tc during the heating cycle.
It is a pressure sensor that detects low pressure (suction pressure) Te during the cooling cycle. And, depending on the output of each of the above sensors,
A controller (not shown) controls the operation of each device of the air conditioner.

Next, the circulation path of the refrigerant will be described. During normal cooling operation, as shown by the solid line arrow in FIG. 2, the four-way switching valve (2) switches as shown by the solid line in the figure, and the outdoor electric expansion valve (4). ), Flow control valve (17), indoor electric expansion valve (6), ...
Is opened and all other valves are closed,
The refrigerant condensed in the outdoor heat exchanger (3) is the main refrigerant circuit (1
0) is circulated, is decompressed by the indoor electric expansion valves (6), ..., Evaporates by the indoor heat exchangers (7), and returns to the compressor (1).

On the other hand, during the simultaneous cold storage and cooling operation, the outdoor electric expansion valve (4) and the flow control valve (1
7), indoor electric expansion valve (6), ..., heat storage electric expansion valve (1
4) and the second opening / closing valve (16) are opened, the first opening / closing valve (15) is closed, and part of the liquid refrigerant condensed in the outdoor heat exchanger (3) flows through the main refrigerant circuit (10). , Indoor electric expansion valve (6),
Is decompressed and evaporated in the indoor heat exchangers (7), ..., While the rest of the liquid refrigerant flows to the first branch pipe (13a) side, the heat storage electric expansion valve (14) decompresses the heat storage heat exchanger. Evaporate at (12). Then, these refrigerants in the gas state are circulated so as to join each other in the gas line (9b) and return to the compressor (1).

Here, the control content during the above-described cold storage and cooling simultaneous operation will be described based on the control state transition diagram or the flowchart of FIGS. 3 to 5.

In the control shown in FIG. 3, after initializing (NON) in the state, the cold storage and the cooling simultaneous operation are performed while permitting the thermo-on in the state, and the heat storage tank (11) detected by the water temperature sensor (Thw). ) Water temperature Tw is higher than a predetermined set value of 25 ° C, and the outside air temperature Ta detected by the outside air temperature sensor (Tha) is higher than a predetermined set value of 35 ° C, the capacity on the indoor side and the heat storage side, that is, It is judged that the balance between the evaporation capacity and the outdoor capacity, that is, the condensation capacity, is tilted in the direction in which the condensation capacity is insufficient, and the state is changed to force each indoor unit (A), ... into the thermo state. Control.
That is, by closing each indoor electric expansion valve (6), ... And operating the indoor fan (7a), ... With the standard air flow rate, the indoor heat exchanger ( 7), ... Controls to reduce the heat exchange amount. During the forced thermostat off operation of each indoor unit (A), the water temperature Tw of the heat storage tank (11) becomes lower than the predetermined recovery value 22 ° C,
If the outside air temperature Ta becomes lower than the predetermined recovery value 32 ° C,
When it is judged that the capacity balance has been restored, the state is returned to, and the cold storage and the cooling simultaneous operation are performed to permit the thermo-ON of the indoor units (A), ....

By the control of the above state, during the simultaneous cold storage and cooling operation, the water temperature Tw and the outside air temperature Ta are received by the outputs of the water temperature sensor (heat storage medium temperature detecting means) (Thw) and the outside air temperature sensor (outside air temperature detecting means) (Tha). When any of the above is greater than or equal to a predetermined set value, operation control means (51A) is configured to control the use-side heat exchanger (7) to forcibly enter the thermo-off state while continuing the cold storage.

Cooling tank (11) when the air conditioner cools and cools simultaneously.
When the inside water temperature Tw rises, the amount of heat exchange in the heat storage heat exchanger (12) increases. When the outside air temperature Ta rises,
The capacity of the outdoor heat exchanger (3) is reduced. That is, the water temperature
When both Tw and the outside air temperature Ta rise above a certain level, the capacity balance between the evaporation capacity and the condensation capacity is lost,
It will lean toward the side where the condensation capacity is insufficient. Therefore,
If the operation is continued as it is, the high pressure may excessively rise, and the compressor (1) may be abnormally stopped due to the high pressure cut.

In that case, in the control shown in FIG. 3, the water temperature Tw and the outside air temperature Ta
Is a predetermined set value (in the above embodiment, 25
℃ and 35 ℃), operation control means (51A)
The indoor units (A), ... Are controlled so as to be in the forced thermo-off state, so that the indoor units (A) ,.
Since the amount of heat exchange on the side is reduced and the capacity balance is corrected to be restored, abnormal stop of the compressor (1) due to excessive rise of high pressure as described above can be prevented in advance, and thus continuous operation is possible. The operating range can be expanded.

Next, in the control shown in the control state transition diagram of FIG. 4, after initializing (NON) in the state, the maximum opening Evmax of the heat storage electric expansion valve (14) in the state is the rated maximum value 2000 ( Water temperature Tw detected by the above-mentioned water temperature sensor (Thw) while performing cool storage and cooling simultaneous operation with unlimited cool storage
Is higher than the set value 25 ℃, and the outside air temperature Ta detected by the outside air temperature sensor (Tha) is higher than the set value 35 ℃,
It is determined that the balance between the evaporation capacity and the condensation capacity has collapsed in the direction in which the condensation capacity becomes insufficient, and the state is shifted to the cold storage limiting operation. That is, the maximum opening of the heat storage electric expansion valve (14)
Evmax 1000 (pulse) (that is, 50% of maximum rated value)
Restricted to. Then, when the water temperature Tw becomes lower than the recovery value 22 ° C. or the outside air temperature Ta becomes higher than the recovery value 32 ° C. during the operation under the control of this state, it is determined that the capacity balance is corrected to be recovered, After returning to the state, the cold storage by the unlimited storage and the simultaneous cooling operation are performed.

Due to the control of the above state, during the simultaneous cold storage and cooling operation, the outputs of the water temperature sensor (Thw) and the outside air temperature sensor (Tha) are received, and when the water temperature Tw and the outside air temperature Ta are both above a predetermined set value, the above heat storage Electric expansion valve (reducing pressure reducing valve) (14)
The operation control means (51B) for controlling so that the maximum opening degree of the above is limited to a predetermined opening degree or less.

Therefore, in the control shown in FIG. 4, the water temperature of the heat storage tank (11) is
When Tw and the outside air temperature Ta rise and the capacity balance between the evaporation capacity and the condensation capacity is lost and the condensation capacity is insufficient, the high pressure may rise excessively and the compressor (1) may stop abnormally. The control means (51B) limits the maximum opening Evmax of the heat storage electric expansion valve (14) to a predetermined opening (50% of the normal in the above embodiment) or less, so that the evaporation capacity decreases and the capacity balance is restored. It is possible to continue the cooling operation in the normal thermo-on permission state on the indoor side, so that the comfort of the air-conditioning feeling is maintained and the abnormal stop of the compressor (1) is prevented in advance. The continuous operation range can be expanded.

Next, in the control shown in the flowchart of FIG. 5, in step S ₁ , signals for the water temperature Tw and the outside air temperature Ta of the water temperature sensor (Thw) and the outside air temperature sensor (Tha) are input, and the step
Based from the signal S ₂ in the following formula _{Evmax = Ev1-C 1 × (} Tw-Tws) -C 2 × (Ta-Tas), the indoor electric expansion valve maximum opening Evmax (6),
... and the heat storage electric expansion valve (14) are calculated. However, Ev1 the rated maximum opening value, C _1, C2 are constants, Tws, respectively Tas water temperature Tw, a predetermined standard value of the outside air temperature Ta, for example, the indoor electric expansion valve for (6), the following (1) Formula Evmax = 1250-40 x (Tw-22) -40 x (Ta-32) (1) For the heat storage electric expansion valve (14), the following formula (2) Evmax = 2000-30 x (Tw- 22) −30 × (Ta−32) It is designed to calculate based on (2).

Opening Then, in step S ₃ to S _5, room required capacity, which is computed for the temperature of the refrigerant in the liquid line, the indoor electric expansion valve from the refrigerant flow rate, etc. (6), ... and the heat storage electric expansion valve (14) Ev is compared with the maximum opening value Evmax, and if the opening value Ev is greater than or equal to the maximum opening value Evmax, the maximum opening value Evmax is set, and if it is smaller than the maximum opening value Evmax, the calculated value remains in each process proceeds to step S _6, and so as to drive the opening Ev of the indoor electric expansion valve (6), ... and the heat storage electric expansion valve (14) of.

In the above flow, in steps S _{1 to} S ₆ , according to the outputs of the water temperature sensor (Thw) and the outside air temperature sensor (Tha) during the cold storage and the cooling simultaneous operation, the higher the water temperature Tw or the outside air temperature Ta, the indoor electric The operation control means (51C) is configured to control the expansion valve (6), ... And the heat storage electric expansion valve (14) so as to reduce the maximum opening value Evmax.

Therefore, in the control shown in FIG. 5, during simultaneous cold storage and cooling operation, the capacity balance between the evaporation capacity and the condensation capacity is lost, and the condensation capacity becomes insufficient, so that the high pressure rises excessively and the compressor (1)
If there is a risk of abnormal stop, the operation control means (51
By C), the maximum opening value Evmax of the opening Ev of each indoor electric expansion valve (6), ... And the heat storage electric expansion valve (14) is restricted to be smaller as the water temperature Tw is higher and the outside air temperature Ta is higher. Since the cooling capacity and the cold storage capacity are reduced according to the ratio determined by various conditions such as the required capacity, the liquid refrigerant temperature, and the refrigerant circulation amount, the total evaporation capacity is reduced. As a result, it is possible to prevent abnormal stoppage of the compressor (1) and expand the continuous operation range while continuing the cold storage and cooling simultaneous operation adapted to the cold storage utilization plan of the device.

In addition, although the multi-type air conditioner in which a plurality of indoor units (A) to (C) are arranged has been described in the above embodiment, the present invention relates to a so-called pair type air conditioner in which only one indoor unit is installed. Needless to say, it is also applicable.

(Effect of the invention) As described above, according to the invention of claim (1), when the heat storage medium temperature and the outside air temperature are higher than the set value during the simultaneous cold storage and cooling operation of the heat storage type air conditioner. ,
Since the heat exchanger on the use side is forcibly set to the thermo-off state while continuing to store cold, the loss of capacity balance between the evaporation capacity and the condensation capacity is corrected, and due to insufficient condensation capacity, the high pressure rises excessively and compresses. It is possible to prevent the possibility that the machine will stop abnormally, and thus to expand the continuous operation range.

According to the invention of claim (2), when the heat storage medium temperature and the outside air temperature are higher than the set values during the simultaneous cold storage and cooling operation of the heat storage type air conditioner, the opening degree of the cold storage pressure reducing valve is opened to a predetermined value. Since it is limited to less than or equal to 5 degrees, it is possible to avoid abnormal stoppage of the compressor due to insufficient condensation capacity without impairing the feeling of air conditioning in the room, and thus to expand the continuous operation range.

According to the invention of claim (3), during simultaneous cold storage and cooling operation of the heat storage type air conditioner, as the heat storage medium temperature or the outside air temperature rises, the opening degree of the use side pressure reducing valve and the cold storage pressure reducing valve can be adjusted. Since it has been narrowed down, it is possible to avoid abnormal stoppage of the compressor due to insufficient condensing capacity while continuing simultaneous cold storage and cooling simultaneous operation according to the cold storage heat utilization plan, thus expanding the continuous operation range. be able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention. Second
The following figures show an embodiment of the present invention, FIG. 2 is a refrigerant piping system diagram showing the overall configuration of an air conditioner, FIG. 3 is a control state transition diagram showing the control content of the invention of claim (1), FIG. 4 is a control state transition diagram showing the control content of the invention of claim (2), and FIG. 5 is a flow chart diagram showing the control content of the invention of claim (3). 1 …… Compressor 3 …… Outdoor heat exchanger (heat source side heat exchanger) 6 …… Indoor electric expansion valve (use side pressure reducing valve) 7 …… Indoor heat exchanger (use side heat exchanger) 10 …… Main Refrigerant circuit 11 …… Heat storage tank 12 …… Heat storage heat exchanger 14 …… Heat storage electric expansion valve (pressure reducing valve for cold storage) 51 …… Operation control means Thw …… Water temperature sensor (heat storage medium temperature detection means) Tha …… Outside temperature Sensor (outside air temperature detection means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-59-183260 (JP, A) Actually open 1-48526 (JP, U) Actually open 59-155440 (JP, U)

Claims (3)

[Claims] 1. A refrigerant circuit (10) in which a compressor (1), a heat source side heat exchanger (3), a pressure reducing mechanism (6) and a utilization side heat exchanger (7) are sequentially connected, and the refrigerant circuit. A heat storage tank (11) that stores a heat storage medium capable of storing heat by exchanging heat with the refrigerant in (10), and a heat storage heat exchanger (12) that performs heat exchange between the heat storage medium in the heat storage tank (11) and the refrigerant. ) And a cold storage pressure reducing valve (14) capable of adjusting the opening for reducing the pressure of the refrigerant to the heat storage heat exchanger (12) during the cold storage operation for storing cold heat in the heat storage tank (11). In the air conditioner, the heat storage medium temperature detecting means (Thw) for detecting the temperature of the heat storage medium, the outside air temperature detecting means (Tha) for detecting the outdoor air temperature, and the heat storage medium temperature detecting means during the simultaneous cold storage and cooling operation. (Thw) and outside air temperature detection means (Tha) output, heat storage medium temperature and outdoor air temperature are both individually And an operation control means (51A) for controlling the use side heat exchanger (7) to forcibly enter the thermo-off state while continuing to store cold when the set value is equal to or more than the set value. Operation control device for heat storage type air conditioner. 2. A refrigerant circuit (10) in which a compressor (1), a heat source side heat exchanger (3), a pressure reducing mechanism (6) and a utilization side heat exchanger (7) are sequentially connected, and the refrigerant circuit. A heat storage tank (11) that stores a heat storage medium capable of storing heat by exchanging heat with the refrigerant in (10), and a heat storage heat exchanger (12) that performs heat exchange between the heat storage medium in the heat storage tank (11) and the refrigerant. ) And a cold storage pressure reducing valve (14) capable of adjusting the opening for reducing the pressure of the refrigerant to the heat storage heat exchanger (12) during the cold storage operation for storing cold heat in the heat storage tank (11). In the air conditioner, the heat storage medium temperature detecting means (Thw) for detecting the temperature of the heat storage medium, the outside air temperature detecting means (Tha) for detecting the outdoor air temperature, and the heat storage medium temperature detecting means during the simultaneous cold storage and cooling operation. (Thw) and outside air temperature detection means (Tha) output, heat storage medium temperature and outdoor air temperature are both individually A heat storage type air control device, comprising: an operation control means (51B) for controlling the opening of the cold storage pressure reducing valve (14) to a predetermined opening or less when the set value is equal to or more than the set value. Operation control device for the harmony device. 3. A refrigerant circuit (10) comprising a compressor (1), a heat source side heat exchanger (3), a utilization side pressure reducing valve (6) and a utilization side heat exchanger (7), which are connected in sequence, and A heat storage tank (11) storing a heat storage medium capable of storing heat by exchanging heat with the refrigerant in the refrigerant circuit (10), and a heat storage heat exchanger performing heat exchange between the heat storage medium in the heat storage tank (11) and the refrigerant. (12), and a cold storage operation in which cold heat is stored in the heat storage tank (11), and a cold storage pressure reducing valve (14) having an adjustable opening degree for reducing the pressure of the refrigerant to the heat storage heat exchanger (12) is provided. In the air conditioner, the heat storage medium temperature detection means (Thw) for detecting the temperature of the heat storage medium, the outside air temperature detection means (Tha) for detecting the outdoor air temperature, and the heat storage medium temperature during the simultaneous cold storage and cooling operation. According to the output of the detection means (Thw) and the outside air temperature detection means (Tha),
And an operation control means (51C) for controlling so that the maximum opening degree of the use side pressure reducing valve (6) and the cold storage pressure reducing valve (14) become smaller as the heat storage medium temperature or the outdoor air temperature becomes higher. Operation control device for heat storage type air conditioner.