JP2000074423A - Ice heat storage unit of air-conditioner equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat transfer performance at low costs. SOLUTION: In an ice heat storage unit 22 of air-conditioner, a coil 34 for allowing a refrigerant to flow inside is arranged in an ice heat storing tank 35 while the coil is submerged, and ice 48 can be formed at the outer periphery of the coil. The ice heat storage unit 22 is provided with a partition plate 61 that crosses the meandering coil and is provided in the ice heat storage tank 35 and divides the ice heat storing tank 35 into upper and lower chambers 65 and 66, thawing pipes 62 and 63 that cross the coil in each chamber of the ice heat storing tank 35, at the same time, are provided near the coil, allow ice to melt when the chill of the ice at the outer periphery of the coil is transferred to the refrigerant in the coil for melting the ice and a water column 49 is formed between the coil and ice, and can form upper and lower thawing holes 72 and 73 passing from the outer periphery of the ice to the water column, and a pump 64 that supplies fluid into the water column from one chamber of the ice heat storage tank 35 via the thawing hole and can move the water of the water column.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ice heat storage unit for an air conditioner.

[0002]

2. Description of the Related Art Generally, as shown in FIG.
A heat source side unit 5 provided with a heat source side heat exchanger 2, a four-way valve 3 and an electric expansion valve 4, and a coil 7 disposed in an ice heat storage tank 6 in a submerged state so that ice 48 can be formed on the outer periphery of the coil 7. An air conditioner 11 having an ice heat storage unit 8 and a use 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 ice heat storage tank 6, ice adheres to the outer periphery of the coil 7 to form ice. The cooling / cooling operation is performed by stopping the compressor 1 of the heat source-side unit 5 and circulating a pump 12 such as a liquid pump or a gas pump installed in the ice heat storage unit 8 for pumping the refrigerant (a liquid pump for pumping the liquid refrigerant in FIG. 3). ). In other words, by the operation of the circulation pump 12, in the coil 7 of the ice heat storage tank 6 in the ice heat storage unit 8, the liquid refrigerant that has absorbed the cold stored in the ice 48 and condensed is pumped to the use side heat exchanger 9, The liquid refrigerant evaporates in the use side heat exchanger 9, and the cooling / cooling operation is performed by the latent heat of evaporation and the heat radiation of the cold heat of the ice 48.

In 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.

[0005]

In the air conditioner 11 described above, as shown in FIG. 6, the refrigerant 13 flowing through the coil 7 of the ice heat storage unit 8 during the cooling / cooling operation is supplied to the air conditioner 11 as shown in FIG.
Cold heat is transferred from the ice 14 formed on the outer periphery of the coil 7, and the refrigerant 13 is condensed and cooled. At this time, coil 7
The ice 14 on the outer periphery is melted, and a water column 15 is formed between the coil 7 and the ice 14. The water in the water column 15 has a temperature of 4 ° C. to 6 ° C. and a small temperature change, so that convection hardly occurs and stagnation occurs. Therefore, the cold heat from the ice 14 is transferred to the refrigerant 13 in the coil 7 through the water in the water column 15 by heat conduction, and the refrigerant 1 in the coil 7 in the ice heat storage tank 6 is cooled.
The heat transfer performance between the ice 3 and the ice 14 is reduced.

In this state, the ice 1 in the ice heat storage tank 6
Even if the water outside of 4 is forced to convect, the heat transfer performance between the refrigerant 13 and the ice 14 in the coil 7 in the ice heat storage unit 8 cannot be improved.

[0007] Therefore, using a pump and a heat exchanger, the refrigerant flowing into or out of the ice heat storage unit 8 and the water 47 in the ice heat storage tank 6 exchange heat with the ice heat storage tank 6. What transfers the cold of the ice 14 in the inside to the refrigerant | coolant 13 is employ | adopted. However, in this case, the cost increases.

An object of the present invention is to provide an ice heat storage unit of an air conditioner that can improve heat transfer performance at low cost, taking the above circumstances into consideration.

[0009]

According to the first aspect of the present invention,
In the ice heat storage unit of the air conditioner in which a coil in which a refrigerant can flow is disposed in a submerged state in the ice heat storage tank and ice can be formed on the outer periphery of the coil, the ice intersects with the meandering coil. A partition plate disposed in the heat storage tank and partitioning the ice heat storage tank into a plurality of chambers, and in each of the chambers of the ice heat storage tank, the partition plate intersects with the coil and is disposed near the coil; When the cold heat of the ice 48 is transferred to the refrigerant in the coil and the ice 48 is melted and a water column is formed between the coil and the ice 48, the ice 48 is melted and the outer periphery of the ice 48 is melted. An ice-melting means capable of forming an ice-melting hole penetrating from the water column to the water column; supplying a fluid from the one of the chambers of the ice storage tank to the water column through the ice-melting hole; And exercise means for enabling the exercise of the 47. It is intended to.

According to a second aspect of the present invention, in the first aspect, the ice melting means is an ice melting pipe for guiding a refrigerant before flowing into a coil in the ice heat storage tank. Things.

According to a third aspect of the present invention, in the first or second aspect, the moving means is a pump for pumping water 47 as a fluid from one chamber of the ice heat storage tank to the other chamber. Water from the other chamber into the water column through the ice-melt hole.
7 is supplied so that the water 47 of the water column can flow along the coil.

According to a fourth aspect of the present invention, in the first or second aspect of the invention, the moving means supplies bubbles as a fluid from one of the chambers of the ice heat storage tank to the water column through the ice melting holes. The water 47 of the water column can be agitated.

The invention according to claim 1 or 3 has the following operation.

When the cold from the ice 48 formed on the outer periphery of the coil is transferred to the refrigerant flowing in the coil and the ice 48 is melted, and when a water column is formed between the coil and the ice 48, the moving means is activated. Through ice-melt holes formed in ice 48 by ice means,
The fluid is supplied from one of the chambers of the ice storage tank into the water column, and the water in the water column is moved, so that the moving water improves the heat transfer performance between the refrigerant in the coil and the ice 48. Can be done.

Further, in the ice heat storage tank provided with the coil, a partition plate for partitioning the ice heat storage tank, an ice melting means provided crossing the vicinity of the coil, and one of the ice heat storage tanks. Means for supplying fluid from the chamber into the water column formed between the coil and the ice 48 to move the water in the water column,
Since the ice heat storage unit of the present invention was configured, it is sufficient to add simple components to the current ice heat storage unit,
Increase in cost can be suppressed.

The second aspect of the present invention has the following operation.

Since the ice melting means is an ice melting pipe for guiding the refrigerant before flowing into the coil in the ice heat storage tank, no special heating source is required to melt the ice and form the ice melting hole. Therefore, the cost can be further reduced.

The invention according to claim 4 has the following operation.

Since the moving means supplies the air bubbles into the water column and enables the water in the water column to be stirred, it is sufficient if one of the chambers of the ice heat storage tank is provided with the air bubble generating portion, so that the cost is reduced. Can be further reduced.

[0020]

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

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

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 such that a compressor 28, a four-way valve 29, a heat source side heat exchanger 30, and an electric expansion valve 31 are sequentially connected to a refrigerant pipe 24. 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 47, and the coil 34 is disposed in the ice heat storage tank 35 in a submerged state.
During the ice making operation of the air conditioner 20, the liquid refrigerant flows from the heat source side heat exchanger 30 into the coil 34 and evaporates, whereby ice 48 (FIG. 2) adheres to the outer periphery of the coil 34 to form. Is done.

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 bifurcated branch pipe 42. 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. Thus, 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 48 in the ice heat storage tank 35. The liquid refrigerant is provided so as to be stored.

In the branch pipe 42, 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 to a first pipe 51, a second pipe 52, a third pipe 53, and a fourth pipe 54.
Is connected to the four-way valve 55 and the small capacity compressor 56. One end of each of the first pipe 51, the second pipe 52, the third pipe 53, and the fourth pipe 54 is connected to each port of the four-way valve 55, and the other ends of the first pipe 51 and the second pipe 52 are connected. It is connected to the discharge port and the suction port of the small capacity compressor 56, respectively. The other ends of the third pipe 53 and the fourth pipe 54 are connected to surge tanks 43A and 43B, respectively.

By the switching operation of the four-way valve 55, the first pipe 51 and the third pipe 53 communicate with each other, and the second pipe 52 and the fourth pipe 54 communicate with each other on the A side. The switching between the communication side 54 and the B-side switching between the second pipe 52 and the third pipe 53 is selectively switched. The small capacity compressor 56 has a smaller capacity (1/10 to 1/2) than the compressor 28 in the heat source side unit 21.
0), which is operated only during the cooling / cooling operation of the air conditioner 20. The refrigerant discharged from the small capacity compressor 56 has the same composition as the refrigerant discharged from the compressor 28 of the heat source side unit 21.

By operating the four-way valve 55 to switch to the A side or the B side, the high-pressure gas refrigerant from the small capacity compressor 56 can be alternately supplied into the surge tank 43A or 43B. Thus, the liquid refrigerant stored in the surge tanks 43A and 43B is configured to be able to be pressure-fed to the use-side heat exchanger 32.

As described above, the ice heat storage unit 22 includes the ice heat storage tank 35, the coil 34, and the surge tank 43A.
43B, a small capacity compressor 56 and a four-way valve 55, a partition plate 61, ice melting pipes 62 and 63 as ice melting means, and a pump 64 (FIG. 2) as moving means.

As shown in FIG. 2, the partition plate 61
The interior of the ice heat storage tank 35 is divided into an upper chamber 65 and a lower chamber 66 while being disposed horizontally below the ice heat storage tank 35 and intersecting the lower part of the coil 34 meandering in the vertical direction. Specifically, the lower part of the coil 34 passes through a long hole formed in the partition plate 61 and reaches the inside of the lower chamber 66.

The ice melting pipe 62 is disposed in the upper chamber 65 of the ice heat storage tank 35, and is disposed near the upper end of the coil 34 meandering in the vertical direction and crossing the upper end of the coil 34. The ice melting pipe 63 is disposed in the lower chamber 66, and is disposed near the lower end of the coil 34 and crosses the lower end of the coil 34.

These ice melting pipes 62 and 63 are shown in FIG.
Are connected by a connecting pipe 67 as shown in FIG. Further, the ice melting pipe 62 is connected to the connection pipe 41 via an ice melting connection pipe 69 having a check valve 68. In addition, ice melting pipe 6
3 is connected to a connection pipe 38 via an ice melting connection pipe 71 provided with a check valve 70.

The check valve 68 allows only the flow of the refrigerant flowing from the use side heat exchanger 32 through the third on-off valve 40 to the ice melting pipe 62. The check valve 70 is connected to the melting ice pipe 6.
Only the flow of the refrigerant flowing from No. 3 to the connection pipe 38 and the branch pipe 42 through the ice melting connection pipe 71 is permitted. Therefore, during the cooling / cooling operation of the air conditioner 20 (described later), the ice-melting pipes 62 and 63 contain the refrigerant before being evaporated by the use-side heat exchanger 32 and flowing to the coil 34 of the ice heat storage tank 35. Some will be introduced. Note that only one of the check valve 68 and the check valve 70 may be provided.

During the ice making operation of the air conditioner 20 (described later), ice 48 adheres to the outer periphery of the coil 34 of the ice heat storage tank 35 and is formed. During the cooling and cooling operation of the air conditioner 20,
The cold heat of the ice 48 is transferred from the use-side heat exchanger 32 to the refrigerant flowing through the coil 34, and as a result, the outer peripheral side of the coil 48 of the ice 48 is melted, and as shown in FIGS. A water column 49 is formed between the ice 48. During the cooling and cooling operation of the air conditioner 20, the ice melting pipes 62 and 63 melt the surrounding ice 48 by introducing the gas refrigerant from the use side heat exchanger 32, and form a water column 49 from the outer periphery of the ice 48. Upper and lower ice melting holes 72 and 7 penetrating toward
3 is formed.

The pump 64 has one end connected to the lower chamber 66 of the ice heat storage tank 35 and the other end disposed in a pressure feed pipe 74 located above or in the upper chamber 65. The pump 64 is driven during the cooling / cooling operation of the air conditioner 20 to pump water 47 in the lower chamber 66 of the ice heat storage tank 35 into the upper chamber 65. Since the inside of the ice heat storage tank 35 is partitioned by the partition plate 61, the water 47 in the upper chamber 65 flows into the water column 49 through the upper ice melting hole 72 of the ice 48 by the driving of the pump 64, whereby The water 47 of the water column 49 is
Flows from top to bottom along the
Through the lower chamber 66.

As described above, by forcibly flowing the water 47 in the water column 49, the coil 3 in the ice heat storage tank 35 is
The heat transfer coefficient between the refrigerant in the 4 and the ice 48 is increased, and the cooling efficiency of the refrigerant flowing through the coil 34 of the ice heat storage tank 35 is improved during the cooling and cooling operation of the air conditioner 20.

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

[A] Ice Making Operation The ice making operation of the air conditioner 20 is performed, for example, in a time period when the electricity rate is low from 10:00 at night to 8:00 in the next morning, the liquid refrigerant from the heat source side heat exchanger 30 is stored in an ice heat storage tank. 35 coils 3
In this operation, ice is supplied into the ice storage tank 35 and ice is stored in the ice heat storage tank 35.

In this case, the electric expansion valve 33 is closed, and the first on-off valve 36, the second on-off valve 37, the third on-off valve 40
The electric 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.

[B] Cooling / cooling operation The cooling / cooling operation of the air-conditioning apparatus 20 is performed, for example, in a daytime when the temperature rises, by liquefaction by the cold heat of the ice in the coil 34 of the ice heat storage tank 35 and the surge tank. The liquid refrigerant stored in 43A, 43B is supplied 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 small capacity compressor 56 is operated, and the four-way valve 55 is alternately switched between A-side switching and B-side switching. For example, when the four-way valve 55 is switched to the A side, the high-pressure gas refrigerant discharged from the small-capacity compressor 56 is guided into the surge tank 43A through the first pipe 51 and the third pipe 53. 43A, the outflow check valve 46A, the merging pipe 44, the refrigerant pipe 2
It flows into the use side heat exchanger 32 through 5 and 27. The liquid refrigerant stored in the surge tank 43A is supplied to the ice heat storage tank 35.
Is a liquid refrigerant that is condensed by the cold heat stored in the ice in the ice heat storage tank 35 and evaporates in the use-side heat exchanger 32, thereby radiating (discharging) the cold heat of the ice. Cooling) and the latent heat of evaporation efficiently cool the room.

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.
Is condensed by the ice inside to become a liquid refrigerant, and the inflow-side check valve 4
It flows into the surge tank 43B via 5B.

At this time, since the pressure in the surge tank 43A is high, the liquid refrigerant in the coil 34 of the ice heat storage tank 35 does not flow into the surge tank 43A,
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.

Before and after the stored liquid refrigerant in the surge tank 43A becomes empty, the four-way valve 55 is switched to the B side, and the high-pressure gas refrigerant discharged from the small capacity compressor 56 is supplied to the first pipe 51 and the fourth pipe 51. It is led into the surge tank 43B via 54. Then, the liquid refrigerant stored in the surge tank 43B flows into the outflow-side check valve 46B, the merge pipe 44, and the refrigerant pipes 25 and 27.
Then, the air flows into the use side heat exchanger 32 via the electric expansion valve 33 and evaporates, and the room is efficiently cooled by cooling and latent heat of evaporation as described above. The gas refrigerant from the use side heat exchanger 32 passes through the connection pipe 41 and the third on-off valve 40 and is condensed by the cold heat of the ice in the coil 34 of the ice heat storage tank 35 to become a liquid refrigerant. It flows into the surge tank 43A via the check valve 45A.

The four-way valve 55 is switched to the A side before and after the stored liquid refrigerant in the surge tank 43B is emptied, and the four-way valve is switched to the B side before and after the stored liquid refrigerant in the surge tank 43A is emptied. The above operation is repeated to continue the cooling / cooling operation.

During the cooling / cooling operation, the use side heat exchanger 3
A part of the gas refrigerant evaporated in 2 is introduced into the ice melting pipes 62 and 63 through the check valve 68, and the pump 64 is driven. As a result, an upper ice melting hole 72 and a lower ice melting hole 73 are formed in the ice 48 formed on the outer periphery of the coil 34 of the ice heat storage tank 35, and the water 47 in the upper chamber 65 of the ice heat storage tank 35 is formed.
Flows into the water column 49 between the coil 34 and the ice 48 through the upper ice hole 72, and the water in the water column 49 is filled with the lower ice hole 73.
Through the ice heat storage tank 35 into the lower chamber 66. As a result, the water flows forcibly in the water column 49, the heat transfer coefficient between the refrigerant flowing through the coil 34 and the ice 48 increases, and the ice 48
Is efficiently transmitted to the refrigerant in the coil 34.

[C] 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, and includes the electric expansion valve 39 and the third cooling operation. The on-off valve 40 is 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 according to the above-described embodiment has the following advantages because it is configured as described above.

The cold heat from the ice 48 formed on the outer periphery of the coil 34 in the ice heat storage tank 35 is transferred to the refrigerant flowing in the coil 34 to melt the ice 48, and a water column 49 is formed between the coil 34 and the ice 48. When formed, the pump 64 operates
Water 47 is supplied from the upper chamber 65 of the ice heat storage tank 35 into the water column 49 through the upper ice melting hole 72 and the lower ice melting hole 73 formed in the ice 48 by 2 and 63, and the water 47 of the water column 49 is Since the fluid flows, the heat transfer performance between the refrigerant in the coil 34 and the ice 48 can be improved by the flowing water 47, and as a result, the condensation efficiency of the refrigerant flowing in the coil 34 can be improved. it can.

The ice heat storage tank 35 in which the coil 34 is disposed
In addition, a partition plate 61 for partitioning the ice heat storage tank 35, and ice melting pipes 62 and 63 intersecting in the vicinity of the coil 34.
And a pump 64 for supplying water 47 from the upper chamber 65 of the ice heat storage tank 35 to the water column 49 through the upper ice-melting hole 72 and flowing the water in the water column 49. Since the heat transfer performance between the cooling medium 34 and the ice 48 has been improved, it is sufficient to add simple components to the existing ice heat storage unit, so that an increase in cost can be suppressed.

Since the refrigerant before flowing into the coil 34 in the ice heat storage tank 35 from the use side heat exchanger 32 is introduced into the ice melting pipes 62 and 63, the ice 48 is melted and the upper ice melting holes 72 and 63 are melted. Since a special heat source is not required to form the lower melting hole 73, the cost can be further reduced. [B] Second Embodiment FIG. 4 shows an ice heat storage unit of an air conditioner according to the present invention. It is a longitudinal cross-sectional view which shows 2nd Embodiment of this. 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 ice heat storage unit 8 of the second embodiment
The moving means at 0 includes a bubble generating pipe 81 and an air supply source 82. The bubble generation pipe 81
The ice storage tank 35 is provided in the lower chamber 66 and has a large number of discharge holes 84 for discharging bubbles 83. The air supply source 82
Is driven during the cooling / cooling operation of the air conditioner 20.

During the cooling and cooling operation of the air conditioner 20, the gas refrigerant is introduced into the ice melting pipes 62 and 63 from the use side heat exchanger 32 and the air supply source 82 is driven, so that the inside of the ice heat storage tank 35 is cooled. An upper ice-melting hole 72 and a lower ice-melting hole 73 are formed in the ice 48, and a large number of bubbles 83 are discharged from a discharge hole 84 of a bubble generation pipe 81. A large number of bubbles 83 discharged from the air supply source 82 flow into the water column 49 from the lower chamber 66 of the ice heat storage tank 35 through the lower ice melting hole 73, and this water column 49
The water 47 rises by stirring, flows into the upper chamber 65 of the ice heat storage tank 35 through the upper ice melting hole 72, and is discharged to the atmosphere. Water column 4
9 is stirred by the large number of bubbles 83, whereby the refrigerant in the coil 34 in the ice heat storage tank 35 and the ice 4
8 and the heat transfer performance of cold heat transferred from the ice 48 to the refrigerant in the coil 34 via the water column 49 is improved.

Therefore, the second embodiment has the same advantages as those of the first embodiment.

The cold heat from the ice 48 formed on the outer periphery of the coil 34 of the ice heat storage tank 35 is transferred to the refrigerant flowing through the coil 34 to melt the ice 48 and form a water column 49 between the coil 34 and the ice 48. Then, the air supply source 82 and the bubble generating pipe 81 pass bubbles 83 from the lower chamber 66 of the ice heat storage tank 35 into the water column 49 through the lower ice melting hole 73 formed in the ice 48 by the ice melting pipe 62. The air bubbles 83 are supplied and flow out into the upper chamber 65 of the ice heat storage tank 35 through the upper ice melting hole 72 formed by the ice melting pipe 63. As a result, the water 47 of the water column 49 is stirred. The heat transfer performance between the refrigerant in the coil 34 and the ice 48 can be improved by the stirring water 47, and the condensation efficiency of the refrigerant flowing through the coil 34 can be improved.

An ice heat storage tank 35 provided with a coil 34
In addition, a partition plate 61 for partitioning the ice heat storage tank 35, and ice melting pipes 62 and 63 intersecting in the vicinity of the coil 34.
And an air supply source 82 for supplying bubbles 83 from a lower chamber 66 of the ice heat storage tank 35 to a water column 49 formed between the coil 34 and the ice 48 to stir the water 47 of the water column 49 and a bubble generation pipe. 81, the heat transfer performance between the refrigerant in the coil 34 and the ice 48 in the ice heat storage tank 35 has been improved, so that it is sufficient to add simple components to the current ice heat storage unit. The rise can be suppressed.

Bubble generating pipe 81 and air supply source 82
However, since the bubbles 83 are supplied into the water column 49 and the water 47 in the water column 49 can be stirred, the bubble generation pipe 81 is disposed in the lower chamber 66 of the ice heat storage tank 35, and the air supply source 82
Therefore, the cost can be further reduced as compared with the ice heat storage unit 22 of the above embodiment.

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

For example, in the above embodiments, the partition plate 6
Although 1 is described as one, two or more partition plates 61 are provided, the inside of the ice heat storage tank 35 is divided into three or more rooms, and an ice melting pipe may be provided in each room. .

Although the melting ice pipes 62 and 63 have been described as introducing the gas refrigerant from the use side heat exchanger 32, they may be those which guide hot water.
3 may be replaced with a heating means such as a heater.

Furthermore, in the above embodiment, the ice heat storage tank 35
Although the coil 34 inside is meandering in the vertical direction,
It may meander in the left-right direction. In this case, the partition plate 6
1 and the first embodiment may be applied by disposing the ice melting pipes 62 and 63 in the vertical direction.

Further, since the surge tanks 43A and 43B, the small capacity compressor 56 and the four-way valve 55 do not exist, the refrigerant from the four-way valve 29 is condensed by the heat source side heat exchanger 30 after the ice making operation, and this condensed. The liquid refrigerant flows into the coil 34 in the ice heat storage tank 35 to be in a supercooled state, and the supercooled liquid refrigerant is guided to the use-side heat exchanger 32 so that the inside of the use-side heat exchanger 32 performs an ice-cooling operation. The present invention may be applied to a harmony device.

[0068]

As described above, according to the ice heat storage unit of the air conditioner according to the present invention, when the ice melts and the water column is formed between the coil and the ice in the ice heat storage tank, the movement of the ice is reduced. Means for supplying a fluid from one of the chambers of the ice heat storage tank into the water column through the ice melting hole formed in the ice by the ice melting means,
Since the water in the water column is moved, the moving water can improve the heat transfer performance between the refrigerant in the coil and the ice.

[Brief description of the drawings]

FIG. 1 is a pipeline diagram illustrating an air conditioner to which an ice heat storage unit of an air conditioner according to a first embodiment of the present invention is applied.

FIG. 2 is a longitudinal sectional view showing a part of the ice heat storage unit of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a longitudinal sectional view showing a second embodiment of the ice heat storage unit of the air conditioner according to the present invention.

FIG. 5 is a pipeline diagram showing a conventional air conditioner.

6 is a longitudinal sectional view showing the ice heat storage unit of FIG.

[Explanation of symbols]

 Reference Signs List 20 Air conditioner 22 Ice heat storage unit 34 Coil 35 Ice heat storage tank 47 Water 48 Ice 49 Water column 61 Partition plate 62 Melting pipe 63 Melting pipe 64 Pump 65 Upper chamber 66 Lower chamber 72 Upper melting hole 73 Lower melting hole 80 Ice heat storage unit 81 Bubble generating pipe 83 Bubble

Claims (4)

[Claims] In an ice heat storage unit of an air conditioner in which a coil in which a refrigerant can flow is disposed in an ice heat storage tank in a submerged state, and ice can be formed on an outer periphery of the coil, the coil has a meandering shape. Crossed and placed in the above ice storage tank,
A partition plate for partitioning the ice heat storage tank into a plurality of chambers; and in each of the chambers of the ice heat storage tank, the partition plate is disposed so as to intersect the coil and be close to the coil. When the ice is melted by being transferred to the refrigerant and a water column is formed between the coil and the ice, the ice can be melted to form a melting ice hole penetrating from the outer periphery of the ice to the water column. Ice melting means, and a movement means for supplying a fluid from one of the chambers of the ice heat storage tank to the water column through the ice melting hole and enabling the water in the water column to move. Characteristic ice storage unit for air conditioners. 2. The ice heat storage unit of an air conditioner according to claim 1, wherein the ice melting means is an ice melting pipe for guiding a refrigerant before flowing into a coil in the ice heat storage tank. 3. A pump for pumping water as a fluid from one chamber of the ice heat storage tank to the other chamber as a fluid,
The air conditioner according to claim 1 or 2, wherein water is supplied from the other chamber into the water column through the ice-melt hole, and the water in the water column can flow along the coil. Ice storage unit. 4. The movement means supplies air bubbles as a fluid from one chamber of an ice heat storage tank to a water column through a melting ice hole, thereby enabling the water in the water column to be stirred. The ice heat storage unit for an air conditioner according to claim 1 or 2, wherein: