JP2000046433A - Air conditioning apparatus equipped with ice heat storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with a liquid pump for sending under pressure a liquid refrigerant in a coil of an ice heat storage unit to a use side heat exchanger and to avoid surely the cavitation apt to occur in the liquid pump. SOLUTION: In an air conditioning apparatus 20 which has a heat source side unit 21 equipped with a compressor 28 and a heat source side heat exchanger 30 an ice heat storage unit 22 having a coil 34 disposed in a submerged state in an ice heat storage tank 35 and a use side unit 23 equipped with a use side heat exchanger 32 and is equipped with the ice heat storage tank enabling execution of an ice making operation and a cooling operation, surge tanks 43A and 43B which can reserve a refrigerant are disposed in a parallel state between the coil 34 in the ice heat storage tank 35 and the use side heat exchanger 32. A liquid refrigerant condensed in the coil 34 is reserved in the tanks 43A and 43B and this reserved liquid refrigerant is made sendable under pressure to the use side heat exchanger by a high-pressure gas refrigerant supplied alternately into the tanks.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having an ice heat storage tank, and more particularly to an air conditioner having an ice heat storage tank for performing cooling and cooling operation by radiating cold stored in an ice heat storage unit. Related to the device.

[0002]

2. Description of the Related Art Generally, as shown in FIG.
A heat source side unit 5 including a heat source side heat exchanger 2, a four-way valve 3 and an electric expansion valve 4, and an ice capable of forming ice on the outer periphery of the coil 7 with a coil 7 disposed in a submerged state in an ice heat storage tank 6. An air conditioner 11 having a heat storage unit 8 and a use side unit 10 including a use side heat exchanger 9 and capable of performing an ice making operation, a cooling / cooling operation, and a normal cooling operation is known.

[0003] In the ice making operation, the gas refrigerant from the compressor 1 passes through the heat source side heat exchanger 2 to become a liquid refrigerant, and then flows through the electric expansion valve 4 into the coil 7 in the ice heat storage tank 6 to evaporate. After the ice making operation is performed in the ice heat storage tank 6, the gas refrigerant is returned to the compressor 1 for execution.

In the cooling / cooling operation, the compressor 1 of the heat source side unit 5 is stopped, and a circulating pump 12 such as a liquid pump or a gas pump installed in the ice heat storage unit 8 for pumping the refrigerant.
(In FIG. 3, the liquid pump for pumping the liquid refrigerant is operated). That is, by the operation of the circulation pump 12, the liquid refrigerant that has absorbed and condensed the cold stored in the ice in the coil 7 of the ice heat storage tank 6 of the ice heat storage unit 8 is pumped to the use-side heat exchanger 9, User side heat exchanger 9
, The liquid refrigerant evaporates, and the cooling / cooling operation is performed by the latent heat of evaporation and the heat radiation of the cold heat of ice.

In the normal cooling operation, the refrigerant that has been guided from the compressor 1 to the heat source side heat exchanger 2 and becomes a liquid refrigerant flows to the use side heat exchanger 9 without flowing into the coil 7 of the ice heat storage tank 6. The liquid refrigerant is supplied to evaporate the liquid refrigerant, and the operation is performed by the latent heat of evaporation.

[0006]

In the cooling / cooling operation described above, cavitation may occur in the circulation pump 12, particularly when the circulation pump 12 is a liquid pump. Further, a liquid pump having a specification corresponding to the type of the refrigerant is required.

[0007] An object of the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air conditioner provided with an ice heat storage tank capable of improving reliability.

[0008]

According to the first aspect of the present invention,
A heat source side unit including a compressor and a heat source side heat exchanger,
An ice heat storage unit in which a coil is disposed in a submerged state in an ice heat storage tank and ice can be formed on the outer periphery of the coil, and a use-side unit having a use-side heat exchanger, and perform an ice making operation and a cooling operation. In an air conditioner having an ice heat storage tank to be enabled, a plurality of tanks capable of storing a refrigerant are arranged in parallel between the coil and the use side heat exchanger in the ice heat storage tank. The liquid refrigerant condensed in the coil is stored in the tank, and is configured to be capable of being pumped to the use-side heat exchanger by a high-pressure gas refrigerant supplied alternately into these tanks. Things.

According to a second aspect of the present invention, in the first aspect of the present invention, the high-pressure gas refrigerant alternately supplied to the plurality of tanks is connected to the heat source side unit when the compressor is stopped. It is a high-pressure gas refrigerant between the side heat exchanger.

According to a third aspect of the present invention, in the first aspect of the present invention, the high-pressure gas refrigerant alternately supplied to the plurality of tanks has a smaller capacity than the compressor of the heat source side unit. Characterized in that it is a high-pressure gas refrigerant supplied from the company.

The first aspect of the invention has the following operation. Liquid refrigerant condensed by the cold heat of ice in the coil of the ice heat storage unit is stored in a plurality of tanks, and these liquid refrigerants are pumped to the use side heat exchanger by high-pressure gas refrigerant supplied alternately into the tanks. Since it is configured to be possible, a liquid pump for pumping the liquid refrigerant in the coil of the ice heat storage unit to the use side heat exchanger becomes unnecessary, and therefore, cavitation that may occur in this liquid pump can be reliably avoided, Reliability can be improved.

The second aspect of the invention has the following operation. Since the high-pressure gas refrigerant between the compressor and the heat-source-side heat exchanger is alternately supplied to the plurality of tanks when the compressor of the heat-source-side unit is stopped, the compressor is not driven and almost no power is used. The supercooled liquid refrigerant in the coil of the ice heat storage unit can be pumped to the use side heat exchanger.

The third aspect of the invention has the following operation.

Since the high-pressure gas refrigerant supplied from the small-capacity compressor having a smaller capacity than the compressor of the heat source side unit is alternately supplied to a plurality of tanks, this small-capacity compressor is a general-purpose compressor. Since there is no need to change the specification according to the type of the refrigerant, parts can be shared and the cost can be reduced.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

[A] First Embodiment FIG. 1 is a pipeline diagram showing a first embodiment of an air conditioner having an ice heat storage tank according to the present invention.

The air conditioner 20 shown in FIG. 1 includes a heat source side unit 21, an ice heat storage unit 22, and a use side unit 23. The refrigerant pipes 24 of the heat source side unit 21 are connected to the refrigerant pipes 25, 26 of the ice heat storage unit 22.
Is connected to the refrigerant pipe 27 of the use-side unit 23 via the.

The heat source side unit 21 is configured by connecting a compressor 28, a four-way valve 29, a heat source side heat exchanger 30 and an electric expansion valve 31 to a refrigerant pipe 24 in order. Further, the use side unit 23 is configured such that the use side heat exchanger 32 and the electric expansion valve 33 are disposed in the refrigerant pipe 27, and the degree of opening of the electric expansion valve 33 is adjusted according to the air conditioning load.

The ice heat storage unit 22 includes an ice heat storage tank 35 accommodating a coil 34,
An on-off valve 36 is provided, and a second on-off valve 37 is provided on the refrigerant pipe 26. Further, the first on-off valve 3 is connected to the refrigerant pipe 25.
One end of the coil 34 is connected to the use side unit 23 side from the disposition position 6 via a connection pipe 38, and an electric expansion valve 39 is disposed on the connection pipe 38. In addition, coil 3
The other end of 4 is connected via a connection pipe 41 provided with a third on-off valve 40 to the use side unit 23 side of the refrigerant pipe 26 where the second on-off valve 37 is provided.

The ice heat storage tank 35 is filled with water, and the coil 3
4 is provided in the ice heat storage tank 35 in a state of being submerged. During the ice making operation of the air conditioner 20, the liquid refrigerant flows from the heat source side heat exchanger 30 and evaporates in the coil 34, whereby ice adheres to the outer periphery of the coil 34 and is formed.

Two surge tanks 43A and 43B are connected in parallel to the connection pipe 38 between a motor-operated expansion valve 39 and the coil 34 via a branch pipe 42 that branches into two branches. These surge tanks 43 </ b> A and 43 </ b> B are connected via a merging pipe 44 between the position where the first on-off valve 36 is disposed in the refrigerant pipe 25 and the position where the connection pipe 38 is connected. Thereby, the surge tanks 43A and 43B are disposed between the coil 34 in the ice heat storage tank 35 and the use side heat exchanger 32, and are condensed by the cold stored in the ice in the ice heat storage tank 35. A liquid refrigerant is provided so as to be able to be stored.

The branch pipe 42 has a surge tank 43A,
Inflow side check valves 45A and 45B are provided on the inflow side of 43B, and outflow side check valves 46A and 46B are provided on the merging pipe 44 on the outflow side of the surge tanks 43A and 43B, respectively. These inflow side check valves 45A, 45B are connected to the surge tanks 43A, 43A from the coil 34 of the ice heat storage tank 35.
B, and allows the flow of the refrigerant flowing only to
A and 46B allow the flow of the refrigerant flowing only from the surge tanks 43A and 43B to the use-side heat exchanger 32 side.

The surge tanks 43A and 43B are connected through a branch pipe 47 between the four-way valve 29 and the heat source side heat exchanger 30 in the refrigerant pipe 24 of the heat source side unit 21. In the branch pipe 47, a first tank opening / closing valve 49 is provided at a branch portion 48A connected to the surge tank 43A.
The second tank opening / closing valves 50 are respectively provided in the branch portions 48B connected to the surge tank 43B.

The first tank on-off valve 49 and the second tank on-off valve 50 are selectively opened and closed, so that the compressor 28 and the heat source side heat exchanger 30 can be connected when the compressor 28 is stopped. The high-pressure gas refrigerant is supplied to the surge tank 43A, 4
3B. Thus, the liquid refrigerant stored in the surge tanks 43 </ b> A and 43 </ b> B is provided to be able to be pressure-fed to the use-side heat exchanger 32.

Next, the ice making operation, the cooling / cooling operation, and the normal cooling operation of the air conditioner 20 will be described.

[A-1] Ice Making Operation The ice making operation of the air conditioner 20 is performed, for example, by using the liquid refrigerant from the heat source side heat exchanger 30 during the period of low electricity rates from 10:00 at night to 8:00 in the next morning. This is an operation of supplying ice into the coil 34 of the heat storage tank 35 and forming ice in the ice heat storage tank 35.

In this case, the electric expansion valve 33, the first tank opening / closing valve 49 and the second tank opening / closing valve 50 are closed, and the first opening / closing valve 36, the second opening / closing valve 37, the third opening / closing valve 40 and the electric The expansion valve 39 is opened.

In this state, when the compressor 28 of the heat source side unit 21 is operated, the gas refrigerant discharged from the compressor 28 is condensed in the heat source side heat exchanger 30 and the electric expansion valves 31 and 39 , And flows into the coil 34 of the ice heat storage tank 35. The refrigerant that has flowed into the coil 34 evaporates and forms with ice adhered to the outer periphery of the coil 34. Thereafter, the gas refrigerant in the coil 34 is connected to the connection pipe 41.
And a refrigerant pipe 26 to a four-way valve 29, and a compressor 28
Is returned to.

[A-2] Cooling / cooling operation In the cooling / cooling operation of the air conditioner 20, for example, during the daytime when the temperature rises, the air is liquefied by the cold heat of the ice in the coil 34 of the ice storage tank 35. The liquid refrigerant stored in the surge tanks 43A, 43B is transferred to the surge tanks 43A, 43B.
This is performed by pumping from B to the use side heat exchanger 32.

In this case, the first on-off valve 36, the second on-off valve 37 and the electric expansion valve 39 are closed, and the electric expansion valve 33
And the third on-off valve 40 is operated to open. Further, the compressor 28 of the heat source side unit 21 is in a stopped state after the ice making operation is completed.

In this state, the first tank on-off valve 49 and the second
The tank opening / closing valve 50 is selectively opened / closed. For example, when the first tank opening / closing valve 49 is opened (the second tank opening / closing valve 50 is closed), the high-pressure gaseous refrigerant between the compressor 28 of the heat source unit 21 and the heat source side heat exchanger 30 becomes the first gas. It flows into the surge tank 43A via the tank opening / closing valve 49. As a result, the liquid refrigerant stored in the surge tank 43A is discharged to the outflow-side check valve 46A, the merging pipe 44, the refrigerant pipes 25 and 2
Through 7, it flows into the use side heat exchanger 32. Since the liquid refrigerant stored in the surge tank 43A passes through the coil 34 of the ice heat storage tank 35 and is condensed by the cold stored in the ice in the ice heat storage tank 35, the use-side heat exchanger 32
By evaporating inside, the heat of the cold of the ice is released (cooling)
And the latent heat of evaporation cools the room efficiently.

The gas refrigerant evaporated in the use-side heat exchanger 32 passes through the connection pipe 41 and the third on-off valve 40 and is stored in the ice heat storage tank 3.
5 and into the ice heat storage tank 35 as described above.
The liquid in the tank becomes liquid refrigerant due to the ice therein, and flows into the surge tank 43B via the inflow-side check valve 45B.

At this time, since the inside of the surge tank 43A is at a high pressure, the liquid refrigerant in the coil 34 of the ice heat storage tank 35 does not flow into the surge tank 43A without flowing into the surge tank 43B.
Flows inside. Similarly, since the pressure inside the surge tank 43B is lower than that of the surge tank 43A,
The stored refrigerant in B does not flow out to the use-side heat exchanger 32 via the outflow-side check valve 46B.

When the amount of the refrigerant stored in the surge tank 43A drops below a predetermined value, the first tank opening / closing valve 49 is closed, and the second tank opening / closing valve 50 is opened. Then, the liquid refrigerant stored in the surge tank 43B flows into the use side heat exchanger 32 via the outflow check valve 46B, the merge pipe 44, the refrigerant pipes 25 and 27, and the electric expansion valve 33, and evaporates. As described above, the room is efficiently cooled by cooling and latent heat of evaporation. The gas refrigerant from the use side heat exchanger 32 is condensed by the cold heat of the ice in the coil 34 of the ice heat storage tank 35 via the connection pipe 41 and the third on-off valve 40, and is branched into the branch pipe 42 and the inflow side check valve 45A. Through surge tank 4
It flows into 3A.

When the liquid refrigerant in the surge tank 43B drops below a predetermined value, the second tank opening / closing valve 50 is closed and the first tank opening / closing valve 49 is opened, and the above-described operation is repeated. During the cooling / cooling operation, since the outside air temperature is generally high, the refrigerant temperature in the heat source side heat exchanger 30 is high, and the high pressure between the compressor 28 and the heat source side heat exchanger 30 in the heat source side unit 21. The gas refrigerant is maintained for a long time, and the above cooling / cooling operation is continued.

However, if the amount of refrigerant in the ice heat storage unit 22 increases during the cooling / cooling operation, the first on-off valve 36 is kept closed in the cooling / cooling operation state. The second on-off valve 37 is opened, the four-way valve 29 is set to the cooling position, the compressor 28 is operated, and the pump is down. As a result, excess refrigerant in the ice heat storage unit 22 is recovered, high-pressure gas refrigerant is secured between the compressor 28 and the heat source side heat exchanger 30 in the heat source side unit 21, and the above-described cooling / cooling operation is performed. It will be continued again.

[A-3] Normal Cooling Operation The normal cooling operation of the air conditioner 20 is a cooling operation that is performed without using the cold heat stored in the ice in the ice heat storage tank 35. 49, second tank on-off valve 5
0, the electric expansion valve 39 and the third on-off valve 40 are closed, and the first on-off valve 36, the second on-off valve 37, and the electric expansion valves 31 and 33 are opened.

In this state, when the compressor 28 is operated,
The gas refrigerant discharged from the compressor 28 is condensed in the heat source side heat exchanger 30, and the electric expansion valve 31, the refrigerant pipe 25
After flowing into the use-side heat exchanger 32 through the electric expansion valve 33 and evaporating in the use-side heat exchanger 32 to cool the room by the latent heat of evaporation, the compressor passes through the refrigerant pipe 26 and the four-way valve 29. Returned to 28.

The air conditioner 20 of the above embodiment has the following effects because it is configured as described above.

The liquid refrigerant condensed by the cold heat of the ice in the coil 34 of the ice heat storage tank 35 is supplied to the surge tanks 43A and 43A.
3B, these liquid refrigerants are stored in the surge tank 4
3A and 43B, the high-pressure gas refrigerant alternately supplied into the units 3A and 43B allows the pressure to be sent to the use-side unit 23.
A circulating pump such as a liquid pump for pumping the liquid refrigerant in the coil 34 of the ice heat storage tank 35 to the use-side unit 23 is not required. Therefore, cavitation that may occur in the liquid pump can be reliably avoided, and reliability is reduced. Can be improved.

When the compressor 28 of the heat source side unit 21 is stopped, the high pressure gas refrigerant between the compressor 28 and the heat source side heat exchanger 30 opens and closes the first tank opening and closing valve 49 and the second tank opening and closing valve 50 alternately. Since the compressor 28 is operated and supplied alternately into the surge tanks 43A and 43B via the branch pipe 47, the compressor 28 is not driven, and almost no power is used.
The liquid refrigerant in the coil 34 can be pressure-fed to the use-side heat exchanger 32.

[B] Second Embodiment FIG. 2 is a pipeline diagram showing an air conditioner having an ice heat storage tank according to a second embodiment of the present invention. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The air conditioner 60 of the second embodiment
The branch pipe 47, the first tank on-off valve 49, and the second tank on-off valve 50 of the air conditioner 20 are deleted, and the small capacity compressor 61 and the four-way valve 62 are replaced with the first pipe 6
3, the second pipe 64, the third pipe 65, and the fourth pipe 66. One end of each of the first pipe 63, the second pipe 64, the third pipe 65, and the fourth pipe 66 is connected to each port of the four-way valve 62, and the first pipe 63,
The other end of the second pipe 64 is connected to the discharge port and the suction port of the small capacity compressor 61, respectively. The other ends of the third pipe 65 and the fourth pipe 66 are connected to the surge tanks 43A and 43B, respectively.

By the switching operation of the four-way valve 62, the communication between the first pipe 63 and the third pipe 65, the communication between the second pipe 64 and the fourth pipe 66, and the communication between the first pipe 63 and the fourth pipe 66 are performed.
And the communication between the second pipe 64 and the third pipe 65 are selectively switched. In addition, the small capacity compressor 61
Is a compressor having a smaller capacity (1/10 to 1/20) than the compressor 28 in the heat source side unit 21 and is operated only during the cooling and cooling operation of the air conditioner 60. The refrigerant discharged from the small capacity compressor 61 has the same composition as the refrigerant discharged from the compressor 28 of the heat source side unit 21.

Further, the inflow-side check valves 45A and 45B and the outflow-side check valves 46A and 46B of the air conditioner 20 are provided with inflow-side on-off valves 67A and 67B and outflow-side on-off valve 68, respectively.
A, 68B.

During the ice making operation and the normal cooling operation, the inflow-side on-off valves 67A and 67B and the outflow-side on-off valves 68A and 68B are all closed, and the small capacity compressor 61 is stopped.

During the cooling / cooling operation, the inflow-side on-off valve 67A
The outlet-side on-off valve 68B and the inlet-side on-off valve 67B and the outlet-side on-off valve 68A are alternately opened and closed to operate the small capacity compressor 61. The four-way valve 62 includes the first pipe 63 and the third pipe 63.
The state is switched to a state in which the pipe 65 is communicated, and the second pipe 64 and the fourth pipe 66 are communicated.
7B and the outflow-side on-off valve 68A are operated to open, and the inflow-side on-off valve 67A and the outflow-side on-off valve 68B are operated to close. It flows into the surge tank 43A via the pipe 63, the four-way valve 62, and the third pipe 65. Thereby, it is stored in the surge tank 43A and the ice heat storage tank 35A.
The liquid refrigerant condensed by the cold heat of the ice of
A, it is pressure-fed to the use side heat exchanger 32 through the merging pipe 44 and the refrigerant pipe 25, etc., evaporates in the use side heat exchanger 32, and the room is cooled and cooled. The gas refrigerant that evaporates in the use-side heat exchanger 32 is connected to the connection pipe 41 and the third on-off valve 40.
Through the coil 34 of the ice heat storage tank 35, becomes a liquid refrigerant by the cold heat of the ice, and is stored in the surge tank 43B via the inflow-side on-off valve 67B.

When the liquid refrigerant in the surge tank 43A drops below a predetermined value, the four-way valve 62 is switched so that the first pipe 63 and the fourth pipe 66 are in communication with each other, and the second pipe 64
When the third piping 65 is in a communicating state, the inflow-side on-off valve 67A and the outflow-side on-off valve 68B are opened, and the inflow-side on-off valve 67B and the outflow-side on-off valve 68A are closed.
The high-pressure gas refrigerant discharged from the small capacity compressor 61 is
The gas flows into the surge tank 43B via the pipe 63, the four-way valve 62, and the fourth pipe 66. Thereby, the surge tank 4
The liquid refrigerant stored in the third heat exchanger 3B passes through the outflow opening / closing valve 68B, the merging pipe 44, the refrigerant pipe 25, and the like.
2 and evaporates in the use side heat exchanger 32 to cool and cool the room. The gas refrigerant evaporated in the use side heat exchanger 32 passes through the coil 34 of the ice heat storage tank 35, is condensed by the cold heat of the ice, and is stored in the surge tank 43A via the inflow side on-off valve 67A.

When the liquid refrigerant in the surge tank 43B drops below a predetermined value, the four-way valve 62 is switched, and the above operation is repeated to continue the cooling / cooling operation.

Therefore, the air conditioner 60 according to the second embodiment has the following effects in addition to the effects similar to the effects of the above embodiment.

The high-pressure gas refrigerant supplied from the small capacity compressor 61 having a smaller capacity than the compressor 28 of the heat source side unit 21 is alternately supplied into the surge tanks 43A and 43B by switching the four-way valve 62. The small-capacity compressor 61 may be a general-purpose compressor, and it is not necessary to change its specifications according to the type of refrigerant, so that parts can be shared and costs can be reduced.

Although the present invention has been described based on one embodiment, the present invention is not limited to this.

For example, in the air conditioner 20 of the first embodiment, the inflow side check valves 45A and 45B and the outflow side check valves 46A and 46B are respectively connected to the air conditioner 60 of the second embodiment. Inlet side on-off valve 67A, 67
B, outflow-side on-off valves 68A, 68B, and further, inflow-side on-off valves 67A, 67B,
The outflow side on-off valves 68A and 68B are respectively the inflow side check valves 45A and 45B and the outflow side check valve 4 of the air conditioner 20.
6A and 46B. In addition, surge tank 43
A and 43B may be three or more.

[0054]

As described above, according to the air conditioner including the ice heat storage tank according to the present invention, a plurality of refrigerants capable of storing the refrigerant can be provided between the coil in the ice heat storage tank and the use side heat exchanger. Are arranged in parallel, the liquid refrigerant in the coil is stored in the tank, and can be pressure-fed to the use-side heat exchanger by high-pressure gas refrigerant supplied alternately into these tanks. This eliminates the need for a liquid pump for pumping the liquid refrigerant in the coil of the ice heat storage unit to the use-side heat exchanger, and can reliably avoid cavitation that may occur in the liquid pump, thereby improving reliability. Can be.

[Brief description of the drawings]

FIG. 1 is a pipeline diagram showing a first embodiment of an air conditioner including an ice heat storage tank according to the present invention.

FIG. 2 is a pipeline diagram showing a second embodiment of an air conditioner including an ice heat storage tank according to the present invention.

FIG. 3 is a pipeline diagram showing an air conditioner provided with a conventional ice heat storage tank.

[Explanation of symbols]

 Reference Signs List 20 air conditioner 21 heat source side unit 22 ice heat storage unit 23 user side unit 28 compressor 29 four-way valve 32 user side heat exchanger 34 coil 35 ice heat storage tank 43A, 43B surge tank 49 first tank opening / closing valve 50 second tank opening / closing Valve 60 Air conditioner 61 Small capacity compressor 62 Four-way valve

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Osamu Kuwahara, Inventor 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. (Reference) 3L092 TA20 UA00 UA02 UA34 VA07 WA15

Claims (3)

[Claims] 1. A heat source unit including a compressor and a heat source side heat exchanger, an ice heat storage unit having a coil disposed in a submerged state in an ice heat storage tank and capable of forming ice on the outer periphery of the coil, A use side unit having a side heat exchanger,
In an air conditioner including an ice heat storage tank capable of performing an ice making operation and a cooling operation, a plurality of tanks capable of storing a refrigerant are provided between the coil and the use side heat exchanger in the ice heat storage tank. The liquid refrigerant condensed in the coil is disposed in a parallel state, is stored in the tank, and is configured to be capable of being pumped to the use side heat exchanger by a high-pressure gas refrigerant supplied alternately into these tanks. An air conditioner equipped with an ice heat storage tank. 2. The high-pressure gas refrigerant alternately supplied to the plurality of tanks is a high-pressure gas refrigerant between the compressor and the heat source side heat exchanger when the compressor of the heat source side unit is stopped. An air conditioner comprising the ice heat storage tank according to claim 1. 3. The high-pressure gas refrigerant alternately supplied to the plurality of tanks is a high-pressure gas refrigerant supplied from a small-capacity compressor having a smaller capacity than a compressor of the heat source side unit. Item 2. An air conditioner comprising the ice heat storage tank according to Item 1.