JP2007292352A - Ice heat storage type air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ice heat storage type air conditioning system capable of easily introducing an ice heat storage method to an existing air conditioning system capable of performing a power saving operation without securing potential energy of a refrigerant in a cooling operation, and performing an air conditioning operation by circulating a refrigerant excluding the water. <P>SOLUTION: The refrigerant A condensed by using cold heat stored in an ice heat storage tank 4 is supplied to an indoor unit 6 from an evaporative condenser 51, and the evaporated refrigerant A is returned from the indoor unit 6 to the evaporative condenser 51 to be circulated. Here, the refrigerant is circulated between the ice heat storage tank 4 and a heat pipe unit 5 in a state that the ice produced in the ice heat storage tank 4 is melted, to allow the refrigerant A to exchange heat. The refrigerant A is supplied from the evaporative condenser 51 to the indoor unit 6 by driving a pump 52 of the heat pipe unit 5, and the evaporated refrigerant A is returned from the indoor unit 6 to the evaporative condenser 51 to be circulated. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an ice heat storage type air conditioning system that generates ice in an ice heat storage tank to store cold energy and performs cooling operation using the stored cold energy.

  In general, an ice heat storage type air conditioning system generates ice in an ice heat storage tank using cheap electric power at night, and uses the ice generated in the ice heat storage tank as a cooling heat source during daytime cooling operation. Such an ice storage type air conditioning system includes a supercooling system and a refrigerant natural circulation type system. The supercooling system performs cooling operation by supercooling the refrigerant with the cold heat of ice generated in the ice heat storage tank. The natural refrigerant circulation system supplies liquid refrigerant to indoor units using the potential energy of liquid refrigerant obtained from the cold heat of ice generated in the ice heat storage tank by the ice heat storage tank and condenser installed on the rooftop. The cooling operation is performed by returning the gas refrigerant evaporated in the indoor unit to the rooftop condenser and condensing the refrigerant (see, for example, Non-Patent Document 1 and Patent Document 1).

  An example of the refrigerant natural circulation type system is shown in FIG. FIG. 5 is a schematic diagram showing the overall configuration of a conventional ice storage type air conditioning system. The ice heat storage air conditioning system 100 includes a heat pump 101, an ice heat storage tank 102, a cooling condenser 103, a liquid receiver 104, and an indoor unit 105, and further includes a liquid receiver 106 for heating operation and an evaporator 107 for heating. It has. Here, it is assumed that the heat pump 101, the ice heat storage tank 102, and the cooling condenser 103 are installed on the roof of a building, for example. First, during the ice heat storage operation, the nighttime power is used to drive the heat pump 101, circulate the refrigerant between the heat pump 101 and the ice heat storage tank 102, generate ice in the ice heat storage tank 102, and accumulate cold heat. .

  In the natural refrigerant circulation operation, the cold water is circulated by a pump provided between the ice heat storage tank 102 and the cooling condenser 103 while melting the ice. In the cooling condenser 103, heat is exchanged between the cooling water and the refrigerant, and the refrigerant is transferred to the cooling condenser 103 using the potential energy of the refrigerant due to the difference in installation position between the cooling condenser 103 and the indoor unit 105. Natural circulation with the indoor unit 105 is performed. In this natural circulation, a liquid flow is generated by the potential energy of the liquid refrigerant in the cooling condenser 103, the liquid refrigerant is supplied to the indoor unit 105 via the liquid receiver 104, and the liquid refrigerant supplied to the indoor unit 105 is This is achieved by evaporating in a heat exchanger as an evaporator to generate cold air, and then evaporating the gas refrigerant as a vapor flow and returning to the cooling condenser 103.

  As described above, according to the conventional ice storage type air conditioning system 100, the potential energy of the refrigerant due to the height difference of the installation position between the cooling condenser 103 and the indoor unit 105, and the specific gravity difference due to the phase change of the refrigerant, By using this to supply the liquid refrigerant to the indoor unit 105 and return it as a gas refrigerant, the refrigerant can be naturally circulated without using a device such as a pump.

Energy Conservation Grand Prize [Minister of International Trade and Industry Award] 1992 (3rd) "Refrigerant Natural Circulation Air-conditioning System", [online], Energy Conservation Center, [Search April 5, 2006], Internet <URL: http: //www.eccj.or.jp/vanguard/commende-03.html> Japanese Unexamined Patent Publication No. 07-198217

  However, in the above-described supercooling system, since it is necessary to increase the cooling capacity, the condenser for supplying the refrigerant cannot be stopped. For this reason, there existed a problem that it was difficult to implement | achieve power saving. Further, since the refrigerant natural circulation system described above uses the potential energy of the refrigerant, the cooling condenser 103, the ice heat storage tank 102, etc. are installed on the roof of the building in the example of FIG. There was a problem that it was necessary to secure potential energy.

  In addition, when the ice heat storage method is newly applied to an existing air conditioning system, there is a problem that it can only deal with an existing air conditioning system that performs an air conditioning operation with cold water. For this reason, for example, when a new ice heat storage method is applied to a system that performs air conditioning by circulating a refrigerant other than water using existing indoor units and outdoor units, the existing indoor unit is changed to cold water. There is a problem that it is necessary and takes time and cost.

  Therefore, the present invention has been made paying attention to such problems, the purpose of which, when performing the cooling operation, it is possible to realize the power saving operation without securing the potential energy of the refrigerant, It is another object of the present invention to provide an ice heat storage air conditioning system that can easily introduce an ice heat storage system even in an existing air conditioning system that performs an air conditioning operation by circulating a refrigerant other than water.

  An ice heat storage type air conditioning system according to the present invention is configured to circulate and supply an ice heat storage tank that generates ice and accumulates cold heat, and a first refrigerant obtained by the cold heat to be supplied to the ice heat storage tank. A first condenser that exchanges heat by condensing the refrigerant, and a pump that circulates the second refrigerant that has undergone heat exchange between the first condenser and an evaporator for cooling a cooling place. And. As a result, the cooling operation can be performed using the ice heat storage tank, and the pump circulates the second refrigerant exchanged by the first condenser, so that the second refrigerant naturally circulates. There is no need to secure the potential energy. In addition, since the first condenser exchanges heat between the first refrigerant and the second refrigerant and cools the cooling place with the second refrigerant, for example, when installing a new ice heat storage type air conditioning system, Air conditioning equipment (evaporator for cooling the cooling place) can be used as it is. Therefore, it is possible to construct a highly flexible system that can cope with any refrigerant, and it is possible to reduce the modification of the existing air conditioning equipment.

  The ice storage air conditioning system according to the present invention is further provided between the first condenser and an evaporator for cooling the cooling place, and is supplied with the second refrigerant supplied from the first condenser. And a controller for controlling the liquid level by controlling the circulation amount of the second refrigerant by the pump. Thereby, the operation | movement according to the load of the air_conditioning | cooling place is realizable by controlling the liquid level of a liquid receiver.

  The ice heat storage air conditioning system according to the present invention further includes a cooler for cooling the liquid receiver and collecting noncondensable gas at the cooled portion, and a gas vent for extracting the noncondensable gas. And a valve. Thereby, the noncondensable gas collected in the liquid receiver can be extracted using the cooler and the gas vent valve.

  The ice heat storage air conditioning system according to the present invention includes a plurality of the first condenser and a pump for circulating the second refrigerant heat-exchanged by the first condenser, and the first refrigerant is The ice heat storage tank and the plurality of first condensers are branched and circulated. Thereby, the cooling operation of a some cooling place can be performed simultaneously using the some installation which combined the 1st condenser and the pump.

  The ice heat storage air conditioning system according to the present invention further includes a second refrigerant that is supplied with a third refrigerant from a condenser, and performs heat exchange by evaporating the third refrigerant and condensing the second refrigerant. A condenser, wherein the pump evaporates the second refrigerant heat-exchanged by the first condenser and the second condenser to cool the first condenser and the second condenser and the cooling place. It circulates between the vessels. Thereby, in addition to the cooling operation by the ice heat storage tank, the cooling operation by the condenser can be performed together, so that it is possible to cope with a high load in the cooling place.

  Moreover, the ice storage-type air conditioning system according to the present invention is characterized in that the first refrigerant and the second refrigerant are different.

  As described above, according to the present invention, when performing the cooling operation, it is possible to realize the power saving operation without securing the potential energy of the refrigerant. Moreover, even if it is the existing air-conditioning system which circulates refrigerants other than water and performs air-conditioning operation, an ice heat storage system can be introduced easily.

The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
[Example 1]
First, Example 1 of the ice heat storage type air conditioning system according to the embodiment of the present invention will be described. FIG. 1-A is a schematic diagram illustrating an overall configuration in Example 1 of an ice heat storage type air conditioning system. The ice heat storage air conditioning system 1 includes a cooling tower 2, a heat pump chiller 3, an ice heat storage tank 4, a heat pipe unit 5, and an indoor unit 6. In addition, valves 201 to 205 and a pump 21 are provided in a pipe through which the refrigerant circulates between the cooling tower 2 and the heat pump chiller 3. Similarly, valves 301 to 304 and a pump 31 are provided in a pipe between the heat pump chiller 3 and the ice heat storage tank 4, and valves 401, 304 are provided in a pipe between the ice heat storage tank 4 and the heat pipe unit 5. 402 and a pump 41 are provided, and valves 601 and 602 are provided in a pipe between the heat pipe unit 5 and the indoor unit 6. The heat pipe unit 5 includes an evaporation condenser 51, a pump 52, a liquid receiver 53, and valves 501 to 505. The indoor unit 6 is provided in a cooling place 61 such as an office of a building.

  Here, comparing the conventional ice storage type air conditioning system 100 shown in FIG. 5 with the ice storage type air conditioning system 1 shown in FIG. 1A, the conventional ice storage type air conditioning system 100 is a refrigerant natural circulation type system. On the other hand, the ice heat storage type air conditioning system 1 is not a refrigerant natural circulation type system but differs in that the refrigerant is circulated by a pump 52. That is, in the ice heat storage type air conditioning system 1, since it is not necessary to secure the potential energy of the refrigerant, it is necessary to install the cooling tower 2, the heat pump chiller 3, the ice heat storage tank 4, and the heat pipe unit 5 on the roof of a building, for example. Absent.

  First, a refrigeration cycle that generates ice in the ice heat storage tank 4 and accumulates cold heat will be described. The cooling tower 2 and the heat pump chiller 3 generate ice in the ice heat storage tank 4 to store heat by circulating the refrigerant. Specifically, the heat pump chiller 3 condenses the refrigerant and drives the pump 31 to circulate the condensed refrigerant in a pipe provided with the opened valves 301 to 304. The condensed refrigerant is supplied to a heat exchange tube (not shown) provided in the ice heat storage tank 4, and the ice heat storage tank 4 exchanges heat with the heat exchange tube, thereby Freezes to produce ice and accumulates cold energy. The refrigerant evaporated by heat exchange in the heat storage tube 4 in the ice heat storage tank 4 is condensed in the heat pump chiller 3, and the condensed refrigerant is supplied again to the heat exchange tube in the ice heat storage tank 4. Thereafter, the refrigeration cycle is repeated in the same manner.

  Next, the cooling operation cycle using the cold energy stored in the ice heat storage tank 4 will be described. While the ice produced in the ice heat storage tank 4 is defrosted, the refrigerant is circulated through a pipe provided with the valves 401, 402, 501, 502 in an open state by driving the pump 41. When the liquid refrigerant is supplied to the evaporation condenser 51 of the heat pipe unit 5, the evaporation condenser 51 exchanges heat with the refrigerant A that circulates between the heat pipe unit 5 and the indoor unit 6. A is cooled and condensed. In this case, the supplied liquid refrigerant is evaporated by the evaporative condenser 51 to generate a gas refrigerant, and then the evaporated gas refrigerant returns to the ice heat storage tank 4.

  On the other hand, the refrigerant A cooled and condensed by exchanging heat in the evaporative condenser 51 is circulated to the pipe provided with the opened valves 503 to 505, 601 and 602 and the liquid receiver 53 by driving the pump 52. Let Specifically, the refrigerant A condensed in the evaporation condenser 51 is stored in the liquid receiver 53 and supplied to the indoor unit 6. And the refrigerant | coolant A supplied to the indoor unit 6 evaporates with the evaporator which is a heat exchanger of the indoor unit 6, and cools the indoor air of the cooling place 61. FIG. Then, the refrigerant A returns to the evaporative condenser 51, becomes the condensed refrigerant A again, and circulates between the evaporative condenser 51 and the indoor unit 6.

  As described above, according to the ice heat storage air conditioning system 1, since the cooling operation is performed using the cold energy stored in the ice heat storage tank 4, power saving such as peak cut can be realized. Further, according to the ice storage type air conditioning system 1, by driving the pump 52 of the heat pipe unit 5, the refrigerant A condensed using the cold heat stored in the ice storage tank 4 is transferred from the evaporation condenser 51 to the indoor unit. 6, the evaporated refrigerant A is returned from the indoor unit 6 to the evaporation condenser 51 and circulated. Thereby, when performing a cooling operation, it is not necessary to secure the potential energy of the refrigerant as shown in FIG. Therefore, since it is not necessary to provide a height difference in the installation position between the heat pipe unit 5 and the indoor unit 6, it is not necessary to install facilities such as the heat pipe unit 5 and the ice heat storage tank 4 on the roof of a building, Restrictions on equipment installation can be relaxed.

  Further, according to the ice heat storage type air conditioning system 1, while the ice generated in the ice heat storage tank 4 is defrosted, the refrigerant is circulated with the heat pipe unit 5 to exchange heat with the refrigerant A, and the refrigerant A Was circulated between the heat pipe unit 5 and the indoor unit 6. Thereby, when newly applying the ice thermal storage air conditioning system 1 to the existing air conditioning system, the existing indoor unit 6 can be used as it is, and a new indoor unit accompanying the introduction of the ice thermal storage air conditioning system 1 can be used. There is no need to provide. That is, even if the existing indoor unit 6 is a facility corresponding to a refrigerant other than water, it can be used as it is, so there is no need to provide a new indoor unit in which the refrigerant corresponding to the ice heat storage tank 4 circulates. Specifically, as shown in FIG. 1-B, when the ice storage type air conditioning system 1 is newly applied to an existing air conditioning system composed of the indoor unit 6, the outdoor unit 700, and the valves 701 and 702, The existing indoor unit 6 can be used as it is by closing the valves 701 and 702, and there is no need to provide a new indoor unit. In this case, the cooling operation can be performed using the cold energy stored in the ice heat storage tank 4, and power saving such as peak cut can be realized.

  FIG. 2 is a diagram illustrating load control and a method for removing noncondensable gas by the ice heat storage type air conditioning system 1 shown in FIG. The heat pipe unit 5 and the indoor unit 6 shown in FIG. 2 are the same as those shown in FIG. 1A, and the evaporation condenser 51, the liquid receiver 53, the pump 52, the valve 601 and the cooling place 61 are the same. . Here, the valves 503, 504, 505, and 602 shown in FIG. 1-A are omitted, and the heat pipe unit 5 includes a valve 510 and a cooler 511 in addition to the configuration shown in FIG. 1-A. ing. In FIG. 1-A, the valve 510 and the cooler 511 are not shown, but are omitted for convenience because they are not necessary for the description.

  First, referring to FIG. 2, load control for setting the cooling place 61 to a predetermined temperature by the cooling operation will be described. The valve 601 is an expansion valve that controls the flow rate of the refrigerant A that circulates between the evaporative condenser 51 and the indoor unit 6 according to the load of the cooling place 61. A controller (not shown) controls the opening degree of the valve 601 so that the temperature of the cooling place 61 matches the set temperature. Thereby, the temperature of the cooling place 61 is kept at a constant set temperature.

  Further, another controller (not shown) inputs the value of the liquid level of the liquid receiver 53, and the amount of liquid fed by the pump 52 (the amount of the refrigerant A) so that the liquid level matches the predetermined set level. ) To control. For example, when the load of the cooling place 61 increases, the evaporation amount of the refrigerant A increases in the indoor unit 6. Then, the amount of the refrigerant A returning from the indoor unit 6 to the evaporation condenser 51 increases, and the heat exchange amount of the evaporation condenser 51 also increases. As a result, the amount of the refrigerant A that accumulates in the liquid receiver 53 increases, resulting in a liquid level. Goes up. In this case, since the liquid level of the liquid receiver 53 is higher than the predetermined set level, the other controller described above supplies the amount of liquid delivered by the pump 52 so that the liquid level is lowered to the predetermined set level. An operation amount for increasing (amount of refrigerant A) is output. Moreover, when the load of the cooling place 61 decreases, control opposite to this is performed. Thereby, since the refrigerant | coolant A suitable for the load of the air_conditioning | cooling place 61 is supplied to the indoor unit 6, it can respond to the increase / decrease in the load of the air_conditioning | cooling place 61, and between the evaporative condenser 51 and the indoor unit 6 is possible. The circulation of the refrigerant A can be stabilized.

  Next, referring to FIG. 2, a method for extracting noncondensable gas from the liquid receiver 53 will be described. Generally, when installing the ice thermal storage air conditioning system 1, non-condensable gas such as air, moisture, and the like are removed by evacuating a refrigerant line such as a pipe through which the refrigerant circulates. However, non-condensable gas or the like cannot be completely removed from the refrigerant line even by evacuation. Further, during the operation of the ice heat storage air conditioning system 1, the non-condensable gas collects in the liquid receiver 53 provided at the outlet of the evaporative condenser 51 and is concentrated. If it does so, the partial pressure of the refrigerant | coolant A will fall, a condensation temperature will fall, and the fall of the condensation capability of the evaporative condenser 51 will be caused. Therefore, the non-condensable gas is collected at one place by utilizing the property that the non-condensable gas collects at a low temperature. Specifically, a part of the liquid receiver 53 is cooled using a cooler 511, and noncondensable gas is collected in the cooled place. Then, the valve 510 is operated to release noncondensable gas. In this way, by periodically removing the non-condensable gas accumulated in the liquid receiver 53, it is possible to avoid a decrease in the condensing capacity of the evaporative condenser 51.

[Example 2]
Next, Example 2 of the ice heat storage type air conditioning system according to the embodiment of the present invention will be described. FIG. 3 is a schematic diagram illustrating the overall configuration of the ice heat storage type air conditioning system according to the second embodiment. In addition to the ice heat storage type air conditioning system shown in FIG. 1-A, the ice heat storage type air conditioning system 10 includes two sets of the heat pipe unit 5 and the indoor unit 6 and is configured with a total of three sets. Specifically, the cooling tower 2, the heat pump chiller 3, the ice heat storage tank 4, the heat pipe units 5-1 to 5-3, and the indoor units 6-1 to 6-3 are provided. The heat pipe units 5-1 to 5-3 include the valve 510 and the cooler 511 shown in FIG. 2 (not shown).

  Here, in FIG. 3, the same parts as in FIG. The heat pipe units 5-1 to 5-3 have the same function, and the indoor units 6-1 to 6-3 also have the same function. Valves 401 and 402 and a pump 41 are provided in the piping between the ice heat storage tank 4 and the heat pipe units 5-1 to 5-3, and between the ice heat storage tank 4 and the heat pipe unit 5-1. In order to circulate the refrigerant between the ice heat storage tank 4 and the heat pipe unit 5-2 and between the ice heat storage tank 4 and the heat pipe unit 5-3, the piping is branched.

  As described above, according to the ice heat storage type air conditioning system 10, the cold heat accumulated in the ice heat storage tank 4 is driven by driving the pumps 52-1 to 52-3 of the heat pipe units 5-1 to 5-3, respectively. Is used to supply the refrigerant A condensed from the evaporation condensers 51-1 to 51-3 to the indoor units 6-1 to 6-3, and the evaporated refrigerant A is evaporated and condensed from the indoor units 6-1 to 6-3. It returned to the containers 51-1 to 51-3 and was made to circulate, respectively. Thereby, it is not necessary to secure the potential energy of the refrigerant when performing the cooling operation. Therefore, since it is not necessary to provide height differences between the installation positions of the heat pipe units 5-1 to 5-3 and the indoor units 6-1 to 6-3, the restrictions on the installation of the facilities are eased. be able to.

Example 3
Next, Example 3 of the ice heat storage type air conditioning system according to the embodiment of the present invention will be described. FIG. 4 is a schematic diagram illustrating an overall configuration of the ice heat storage type air conditioning system according to the third embodiment. The ice heat storage type air conditioning system 11 includes a cooling tower 2, a heat pump chiller 3, an ice heat storage tank 4, a heat pipe unit 50, and an indoor unit 6. The heat pipe unit 50 includes the valve 510 and the cooler 511 shown in FIG. 2 (not shown).

  Comparing the ice heat storage type air conditioning system shown in FIG. 1A and the ice heat storage type air conditioning system 11 shown in FIG. 4, the ice heat storage type air conditioning system 11 includes a second evaporative condenser 51-1 in the heat pipe unit 50. In order to perform the cooling operation by the heat pump chiller 3, the piping between the ice heat storage tank 4 and the heat pipe unit 50, the evaporation condenser 51-2 and the indoor unit 6 It is different in that a pipe between and is added.

  This ice heat storage type air conditioning system 11 cannot cope with the cooling operation only by the ice heat storage tank 4, for example, when an excessive heat load is generated in the cooling place 61 or the load is larger than the heat storage amount of the ice heat storage tank 4. In the case of a large size, in addition to the cooling operation by the ice heat storage tank 4, the cooling operation by the heat pump chiller 3 is also performed.

  Specifically, in the cooling operation, the valves 302 and 303 provided in the pipe between the heat pump chiller 3 and the ice heat storage tank 4 are closed, and the heat pump chiller 3 condenses the refrigerant to drive the pump 31. Thus, the condensed refrigerant is circulated in the pipe provided with the opened valves 301, 304, 506, and 507. When the condensed refrigerant is supplied to the evaporation condenser 51-2 of the heat pipe unit 50, the evaporation condenser 51-2 heats the refrigerant to the refrigerant A that circulates between the heat pipe unit 50 and the indoor unit 6. Exchange the refrigerant A to cool and condense it. In this case, the supplied refrigerant is evaporated by the evaporative condenser 51-2, a gas refrigerant is generated, and then the evaporated gas refrigerant returns to the heat pump chiller 3.

  The refrigerant A cooled and condensed by exchanging heat in the evaporative condenser 51-2 is also the same as the refrigerant A (explained in FIG. 1-A) cooled and condensed by exchanging heat in the evaporative condenser 51-1. Then, the pump 52 is driven to circulate through the pipes in which the opened valves 503 to 505, 601 and 602 and the liquid receiver 53 are provided. Specifically, the refrigerant A condensed in the evaporation condensers 51-1 and 51-2 is stored in the liquid receiver 53 and supplied to the indoor unit 6. And the refrigerant | coolant A supplied to the indoor unit 6 evaporates with the heat exchanger of the indoor unit 6, and cools the indoor air of the cooling place 61. FIG. Then, the refrigerant A returns to the evaporative condensers 51-1 and 51-2, becomes condensed refrigerant A again, and circulates between the evaporative condensers 51-1 and 51-2 and the indoor unit 6.

  As described above, according to the ice thermal storage air conditioning system 11, in addition to the cooling operation by the ice thermal storage tank 4 in the ice thermal storage air conditioning system 1 shown in FIG. 1-A, the cooling operation by the heat pump chiller 3 is also performed. I started driving. Accordingly, it is not necessary to secure the potential energy of the refrigerant as shown in FIG. 5, so that restrictions on the installation of equipment can be relaxed, and when an excessive heat load is generated in the cooling place 61 or the ice heat storage tank 4 The cooling operation corresponding to the case where the load is larger than the amount of stored heat can be performed.

  The present invention has been described with reference to the first to third embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical idea thereof. For example, in the second embodiment, an example of the ice heat storage type air conditioning system 10 including three sets of the heat pipe unit 5 and the indoor unit 6 is shown. However, the number of sets of the heat pipe unit 5 and the indoor unit 6 is three. It is not limited. In the third embodiment, the ice heat storage type air conditioning system 11 including one set of the heat pipe unit 50 and the indoor unit 6 is shown. However, as in the second embodiment, the ice storage type air conditioning system 11 may be configured by a plurality of sets. Good.

  In the cooling operation cycles of the first to third embodiments, the refrigerant supplied from the ice heat storage tank 4 to the evaporation condenser 51 is described as a liquid refrigerant, and the refrigerant returning from the evaporation condenser 51 to the ice heat storage tank 4 is described as a gas refrigerant. The cold water that does not evaporate in the heat pipe unit 5 may be circulated as a refrigerant.

  Moreover, in Examples 1-3, although the system which performs only a cooling operation was shown, piping, an evaporator, etc. which perform a heating operation may be provided so that it can switch between a cooling operation and a heating operation.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the whole structure of the ice thermal storage type | formula air conditioning system (Example 1) by embodiment of this invention. It is the schematic which shows the whole structure of the ice thermal storage type | formula air conditioning system of FIG. 1-A, and the existing outdoor unit. It is a figure explaining extraction methods, such as load control and noncondensable gas. It is the schematic which shows the whole structure of the ice thermal storage type | formula air conditioning system (Example 2) provided with the several heat pipe unit and the indoor unit. It is the schematic which shows the whole structure of the ice thermal storage type | formula air conditioning system (Example 3) which performs a chase operation. It is the schematic which shows the whole structure of the conventional ice thermal storage type | formula air conditioning system.

Explanation of symbols

1, 10, 11, 100 Ice storage type air conditioning system 2 Cooling tower 3 Heat pump chiller 4, 102 Ice storage tank 5 Heat pipe unit 6, 105 Indoor unit 21, 31, 41, 52 Pump 51 Evaporative condenser 53, 106 Receiving liquid Unit 61 Cooling place 101 Heat pump 103 Condensing unit 104 Receiving unit 107 Evaporating unit 201-205, 301-304, 401, 402, 501-510, 601, 602, 701, 702 Valve 511 Cooling unit 700 Outdoor unit

Claims (6)

An ice storage tank that generates ice and accumulates cold energy;
A first condenser that is supplied by circulating the first refrigerant obtained by the cold heat with an ice heat storage tank, and performs heat exchange by condensing the second refrigerant;
A pump for circulating the heat-exchanged second refrigerant between the first condenser and an evaporator for cooling the cooling place;
An ice-heat storage type air conditioning system. In the ice thermal storage air conditioning system according to claim 1,
Further, the second refrigerant is provided between the first condenser and the evaporator for cooling the cooling place, and stores the second refrigerant supplied from the first condenser, and the controller causes the pump to An ice heat storage type air conditioning system comprising a liquid receiver in which a circulating level of the refrigerant 2 is operated to control a liquid level. In the ice thermal storage air conditioning system according to claim 2,
A cooler for cooling the receiver and collecting non-condensable gas at the cooled location;
An ice heat storage air conditioning system comprising a gas vent valve for extracting the non-condensable gas. In the ice thermal storage type air conditioning system according to any one of claims 1 to 3,
A plurality of the first condenser and a pump for circulating the second refrigerant heat-exchanged by the first condenser;
The ice heat storage type air conditioning system, wherein the first refrigerant circulates between the ice heat storage tank and the plurality of first condensers. In the ice thermal storage air conditioning system according to any one of claims 1 to 4,
Furthermore, a third refrigerant is supplied from the condenser, and includes a second condenser that performs heat exchange by evaporating the third refrigerant and condensing the second refrigerant,
The pump exchanges the second refrigerant heat exchanged by the first condenser and the second condenser between the first condenser and the second condenser and the evaporator for cooling the cooling place. Ice storage type air conditioning system characterized by circulation. In the ice thermal storage air conditioning system according to any one of claims 1 to 5,
The ice heat storage type air conditioning system, wherein the first refrigerant and the second refrigerant are different.

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