KR102014457B1 - A combined refrigerating and air conditioning system - Google Patents

Abstract

The present invention relates to an air conditioning refrigeration complex system.
An air conditioning refrigeration composite system according to an embodiment of the present invention includes an air conditioning unit including a first compressor and an air conditioning side indoor heat exchanger; A cooling unit including a second compressor and a cooling heat exchanger; An outdoor heat exchanger disposed at an outdoor side and configured to pass a refrigerant circulating the air conditioning unit and a refrigerant circulating the cooling unit; And a blower fan disposed at one side of the outdoor heat exchanger to blow outdoor air to the outdoor heat exchanger, and a refrigerant passing through the outdoor heat exchanger is introduced to store a cold heat source. A first inlet pipe guiding the introduction of a refrigerant into the storage cooling tank during the storage cooling in the storage storage tank; And a second inflow pipe for guiding the introduction of the refrigerant into the storage cooling tank when the cooling heat source stored in the storage cooling tank is used.

Description

{A combined refrigerating and air conditioning system}

The present invention relates to an air conditioning refrigeration complex system.

The air conditioning system is to cool and heat an indoor space by heat exchange between a refrigerant flowing in a heat exchange cycle, indoor air, and outdoor air. In the cooling system, a cooling (freezing or refrigerating) of food or the like is performed in the predetermined space by the refrigerant flowing through the heat exchange cycle, heat exchange in an outdoor air space, and heat exchange between the refrigerant and the predetermined space.

In detail, the air conditioning system includes a compressor for compressing a refrigerant and an indoor heat exchanger and an outdoor heat exchanger for performing heat exchange between the refrigerant and indoor and outdoor air. The cooling system includes a compressor for compressing a refrigerant, an outdoor heat exchanger for condensing the refrigerant, and a refrigerated heat exchanger for evaporating the refrigerant. As such, the air conditioning system and the cooling system are driven with a similar refrigerant system.

However, in the related art, such an air conditioning system and a cooling system are driven separately, and thus, a manufacturing cost for constructing the system is high.

In particular, the outdoor heat exchanger used for the air conditioning system and the outdoor heat exchanger used for the cooling system are configured to be provided in a separate case, and a separate blower fan is provided on one side of the case, thereby increasing the installation area of the outdoor heat exchanger. .

In addition, there is a problem that the manufacturing and installation costs of the system for providing the outdoor heat exchanger and the blower fan in the air conditioning and cooling system, respectively, are increased.

On the other hand, in the hybrid system in which the air conditioning system and the cooling system are operated at the same time, the amount of heat input to the air conditioning system during the night time when the air conditioning load is low has been discarded to the outside, there is a problem that the operating efficiency of the complex system is reduced.

That is, although the air conditioning system is not necessary or the air conditioning load is low at night time, there is a problem that the refrigeration cycle for performing air conditioning (cooling or heating) is operated in the same manner as the daytime, so that the heat quantity of the air conditioning is not sufficiently recovered. .

The present invention has been proposed to solve such a problem, and an object of the present invention is to provide an air conditioning refrigeration complex system using cold storage.

An air conditioning refrigeration composite system according to an embodiment of the present invention includes an air conditioning unit including a first compressor and an air conditioning side indoor heat exchanger; A cooling unit including a second compressor and a cooling heat exchanger; An outdoor heat exchanger disposed at an outdoor side and configured to pass a refrigerant circulating the air conditioning unit and a refrigerant circulating the cooling unit; And a blower fan disposed at one side of the outdoor heat exchanger to blow outdoor air to the outdoor heat exchanger, and a refrigerant flowing through the outdoor heat exchanger is introduced to store a cold heat source. A first inlet pipe guiding the introduction of a refrigerant into the storage cooling tank during the storage cooling in the storage storage tank; And a second inflow pipe for guiding the introduction of the refrigerant into the storage cooling tank when the cooling heat source stored in the storage cooling tank is used.

According to another embodiment, an air conditioning refrigeration composite system includes: an air conditioning unit including a first refrigerant cycle including a first compressor and an air conditioning-side indoor heat exchanger; A cooling unit in which a second refrigerant cycle including a second compressor and a cooling heat exchanger is operated; An outdoor heat exchanger including a first heat exchanger forming the first refrigerant cycle and a second heat exchanger forming the second refrigerant cycle; A blowing fan disposed at one side of the outdoor heat exchanger to blow outdoor air to the first heat exchanger and the second heat exchanger; A heat storage tank in which a cool heat source is stored in the process of evaporating the refrigerant passing through the first heat exchange unit; A first inlet pipe for guiding the refrigerant passing through the first heat exchange unit to the storage tank; And a second inflow pipe guiding the refrigerant passing through the second heat exchanger to the storage tank.

According to the present invention, since the evaporation heat of the air conditioning unit is stored in the cold storage tank and the stored heat amount can be used in the cooling unit, the operating efficiency of the cooling unit can be improved and the performance coefficient can be increased.

In addition, there is provided a subcooler in which heat exchange is performed between the refrigerant of the air conditioning unit and the refrigerant of the cooling unit, the refrigerant of the cooling unit is supercooled in the process of performing the heat exchange in the subcooler, and the refrigerant of the air conditioning unit recovers condensation heat from the refrigerant of the cooling unit. The performance of can be improved.

In addition, since the air conditioning side outdoor heat exchanger and the refrigeration side outdoor heat exchanger are provided in one case, and the heat exchange of the outdoor heat exchanges is performed by one blower fan, the installation area of the outdoor heat exchanger is reduced and the manufacturing and installation costs are reduced. It works.

1 is a system diagram showing the configuration of a combined air conditioning refrigeration system according to a first embodiment of the present invention.
FIG. 2 is a system diagram showing a refrigerant flow when a cold heat source is stored in a cold storage tank in an air conditioning refrigeration combined system according to a first embodiment of the present invention.
3 is a system diagram showing a refrigerant flow when using a cold heat source stored in a cold storage tank in the air conditioning refrigeration combined system according to the first embodiment of the present invention.
4 is a system diagram showing a configuration of an air conditioning refrigeration combined system according to a second embodiment of the present invention.
FIG. 5 is a system diagram showing a refrigerant flow when a cold heat source is stored in a cold storage tank in an air conditioning refrigeration combined system according to a second embodiment of the present invention.
FIG. 6 is a system diagram showing a refrigerant flow when using a cold heat source stored in a cold storage tank in an air conditioning refrigeration combined system according to a second embodiment of the present invention.

Hereinafter, with reference to the drawings will be described a specific embodiment of the present invention. However, the spirit of the present invention is not limited to the embodiments presented, and those skilled in the art who understand the spirit of the present invention can easily suggest other embodiments within the scope of the same idea.

1 is a system diagram showing the configuration of a combined air conditioning refrigeration system according to a first embodiment of the present invention.

Referring to FIG. 1, the air conditioning refrigeration composite system 10 (hereinafter referred to as a composite system) according to the first embodiment of the present invention includes an air conditioning unit, a cooling unit, and a storage storage tank.

The air conditioning unit includes a first compressor 110 and a second compressor 112. The first compressor 110 and the second compressor 112 are connected in parallel. For example, the first compressor 110 may be an inverter compressor, and the second compressor 112 may be a constant speed compressor. As another example, the first compressor 110 may be a main compressor, and the second compressor 112 may be a backup compressor used when the operation of the first compressor 110 is restricted.

The air conditioning unit includes a plurality of flow switching units 115 and 117 which guide the refrigerant discharged from the first compressor 110 or the second compressor 112 to the air conditioning side indoor heat exchanger 150 or the outdoor heat exchanger 120. Included.

The plurality of flow diverters 115 and 117 may include a first flow diverter 115 and a first flow diverter 115 disposed at an outlet side of the first compressor 110 or the second compressor 112. A second flow diverter 117 is included. The first flow diverter 115 and the second flow diverter 117 may be a three-way valve or a four-way valve.

In the air conditioning unit, the refrigerant discharged from the first compressor 110 or the second compressor 112 bypasses the first flow switching unit 115 to guide the second flow switching unit 117 to flow. Bypass piping 118 is further included.

The air conditioning unit includes an outdoor heat exchanger 120 disposed at the outdoor side to exchange heat with the outdoor air, and a blowing fan 125 for forced flow of the outdoor air. In addition, the air conditioning unit includes an air conditioning side indoor heat exchanger 150 disposed on the indoor side to exchange heat with the indoor air. Although not shown in the drawings, one side of the air conditioning side indoor heat exchanger 150 is provided with a blowing fan.

The air conditioning unit includes a first expansion unit 131 disposed at the inlet side of the outdoor heat exchanger 120 to reduce the refrigerant and an inlet side of the air conditioning side indoor heat exchanger 150 to reduce the refrigerant. 2 expansion portion 133 is included.

During the cooling operation of the air conditioning unit, the refrigerant compressed by the compressors 110 and 112 is introduced into the air conditioning-side indoor heat exchanger 150 while passing through the first flow switching unit 115 or the second flow switching unit 117. Condensation. The condensed refrigerant is depressurized in the first expansion part 131, and then evaporated in the outdoor heat exchanger 120 and introduced into the compressors 110 and 112 again.

During the heating operation of the air conditioning unit, the refrigerant compressed by the compressors 110 and 112 is introduced into the outdoor heat exchanger 120 and condensed while passing through the first flow switching unit 115 or the second flow switching unit 117. . The condensed refrigerant is decompressed in the second expansion part 133, and then evaporated in the air conditioning-side indoor heat exchanger 150 and flowed back into the compressors 110 and 112.

The cooling unit may include the compressors 110 and 112, an outdoor heat exchanger 120 into which the refrigerant compressed by the compressors 110 and 112 flows, and a third expansion part that decompresses the refrigerant condensed in the outdoor heat exchanger 120. And a cooling heat exchanger 160 through which the refrigerant expanded in the third expansion part 135 is introduced and evaporated.

The compressors 110 and 112 and the outdoor heat exchanger 120 are understood as a common configuration in which the refrigerant of the air conditioning unit and the refrigerant of the cooling unit are circulated.

The complex system 10 includes a refrigerant heat exchanger 170 for exchanging heat between the refrigerant of the air conditioning unit and the refrigerant of the cooling unit. The refrigerant heat exchanger 170 includes a first flow passage 171 through which the refrigerant of the air conditioner flows and a second flow passage 172 through which the refrigerant of the cooling unit flows. For example, heat exchange in the refrigerant heat exchanger 170 may be performed by contact between the first flow path 171 and the second flow path 172.

At the inlet side of the refrigerant heat exchanger 170, a fourth expansion part 137 is provided to reduce the refrigerant to be introduced into the first flow path 171. At least a portion of the refrigerant condensed in the outdoor heat exchanger 120 or the air conditioning-side indoor heat exchanger 150 may be branched from the first branch portion 175 and introduced into the fourth expansion portion 137.

The refrigerant decompressed in the fourth expansion part 137 may flow into the first flow path 171 to exchange heat with the refrigerant of the second flow path 172. In the process of exchanging the refrigerant of the first passage 171 and the refrigerant of the second passage 172, the refrigerant of the first passage 171 may be evaporated and the refrigerant of the second passage 172 may be supercooled. . Therefore, the refrigerant heat exchanger 170 may be referred to as a "supercooler".

At the inlet side of the compressors 110 and 112, a third flow control unit 119 is provided to guide the refrigerant of the first flow path 171 evaporated from the refrigerant heat exchanger 170 to the compressors 110 and 112. Therefore, the refrigerant of the first flow path 171 may flow into the compressors 110 and 112 through the third flow control unit 119.

In addition, the refrigerant of the supercooled second flow path 172 may be reduced in the third expansion part 135 and then evaporated in the cooling heat exchanger 160.

Through the refrigerant heat exchanger 170, the refrigerant of the air conditioning unit recovers the amount of condensation heat from the refrigerant of the cooling unit, and the refrigerant of the cooling unit may be supercooled, thereby improving system efficiency of the air conditioning unit and the cooling unit.

The combined system 10 includes a storage cooling tank 200 for storing the heat of evaporation of the air conditioning unit and using the stored heat in the cooling unit. The cold storage tank 200 may be disposed at the outlet side of the outdoor heat exchanger 120.

The storage tank 200 may include a heat exchange material for storing a heat source of the refrigerant. The heat exchange material may include a material that is easily heat exchanged with the refrigerant, and may include, for example, a material such as water or CO 2. The heat exchange material may include a phase change material (PCM).

At the inlet side of the storage tank 200, the first inlet pipe 210 to allow the refrigerant to flow into one side of the storage tank 200 and the second inlet pipe 220 to enter the other side of the storage tank 200. ) Is provided. The first inflow pipe 210 is a pipe for guiding the introduction of the refrigerant into the storage cooling tank 200 during the storage cooling, and the second inflow pipe 220 when using the cold heat source stored in the storage cooling tank 200, It can be understood as a pipe for guiding the introduction of the refrigerant into the storage tank 200. The second inlet pipe 220 may be branched from the first inlet pipe 210 and connected to the storage tank 200.

The first inlet pipe 210 is provided with a first cold storage expansion part 215. The first storage cooling expansion unit 215 expands at least a portion of the refrigerant condensed in the outdoor heat exchanger 120 and enters the storage cooling tank 200 during the storage. The refrigerant introduced into the storage tank 200 may be evaporated while being exchanged with the heat exchange material of the storage tank 200. At this time, the heat exchange material may be cooled to store a cold heat source.

The second inlet pipe 220 is provided with a second cold storage expansion part 225. When the second cold storage expansion unit 225 uses the cold storage heat source, the second refrigerant storage expands and expands the refrigerant of at least a portion of the refrigerant condensed in the outdoor heat exchanger 120 to enter the storage cooling tank 200. The refrigerant introduced into the storage tank 200 may be supercooled by receiving a cooling heat source stored in the heat exchange material.

When the first cold storage expansion unit 215 is opened to allow the refrigerant to flow through the first inlet pipe 210, the second cold storage expansion unit 225 may be closed. Therefore, the refrigerant may be restricted to flow the second inlet pipe 220. On the other hand, when the second cold storage expansion unit 225 is opened and the refrigerant flows through the second inlet pipe 220, the first cold storage expansion unit 215 may be closed. Therefore, the refrigerant may be restricted to flow the first inlet pipe 210.

On the outlet side of the storage tank 200, check valves 231 and 233 which guide the one-way flow of the refrigerant are provided. The check valves 231 and 233 include a first check valve 231 communicating with the first inlet pipe 210 and a second check valve 233 communicating with the second inlet pipe 220. Refrigerant is limited to flow from the outlet side of the cold storage tank 220 to the inlet side of the cold storage tank 200 by the check valve (231, 233).

Hereinafter, the flow of the refrigerant according to the present embodiment will be described.

2 is a system diagram showing a refrigerant flow when a cold heat source is stored in a cold storage tank in the air conditioning refrigeration complex system according to the first embodiment of the present invention, and FIG. 3 is an air conditioning refrigeration system according to the first embodiment of the present invention In a composite system, a system diagram showing refrigerant flow when using a cold heat source stored in a cold storage tank.

2, a cooling heat source may be stored in the storage cooling tank 200 during the cooling operation of the air conditioning unit. That is, cold storage can be achieved. In one example, the cold storage may be performed during the summer night.

In detail, the refrigerant passing through the compressors 110 and 120 is introduced into the outdoor heat exchanger 120 through the first flow diverter 115 or the second flow diverter 117.

At least some of the refrigerant condensed in the outdoor heat exchanger 120 may be reduced in the third expansion part 135 via the refrigerant heat exchanger 170 and then evaporated in the cooling heat exchanger 160. The evaporated refrigerant is introduced into the first compressor 110 or the second compressor 120. At this time, the refrigerant may not be heat exchanged with the refrigerant of the air conditioning unit in the process of passing through the refrigerant heat exchanger (170).

The remaining refrigerant of the refrigerant condensed in the outdoor heat exchanger 120 is introduced into the storage tank 200 through the first inlet pipe 215. At this time, the refrigerant may be reduced in pressure in the first storage cooling expansion unit (215). In the process of flowing the cool storage tank 200, the coolant may be heat exchanged (evaporated) with a heat exchange material to store a cool heat source in the cool storage tank 200. The refrigerant evaporated in the storage tank 200 flows into the first compressor 110 or the second compressor 120.

As such, when the cooling is performed in the storage tank 200, the refrigerant of the cooling unit circulates a refrigeration cycle, while the refrigerant of the air conditioning unit is evaporated (cooled) in the storage tank 200, and then indoors of the air conditioning side. It may be introduced into the compressor (110, 120) without passing through the heat exchanger (150). That is, cooling in the air conditioning unit may not be achieved.

Referring to FIG. 3, during the cooling operation of the air conditioning unit, the refrigerant of the cooling unit may be supercooled by using the cooling heat source stored in the storage cooling tank 200. In one example, the use of the cold heat source stored in the cold storage may be made during the summer night.

In detail, the refrigerant passing through the compressors 110 and 120 is introduced into the outdoor heat exchanger 120 through the first flow diverter 115 or the second flow diverter 117.

At least some of the refrigerant condensed in the outdoor heat exchanger 120 flows into the second expansion part 133 to be depressurized and then evaporates in the air conditioning-side indoor heat exchanger 150. Therefore, the cooling operation through the air conditioning unit can be made. Meanwhile, some of the at least some of the refrigerant may be introduced into the first flow path 171 of the refrigerant heat exchanger 170 from the first branch 175 to exchange heat with the refrigerant of the cooling unit.

The remaining refrigerant of the refrigerant condensed in the outdoor heat exchanger 120 is introduced into the storage tank 200 through the second inlet pipe 225. At this time, the refrigerant may be reduced in the second cold storage expansion unit 225. In the process of flowing the refrigerant storage tank 200, the refrigerant may be heat-exchanged with a heat exchange material to receive a cold heat source from the storage tank 200. Thus, the refrigerant can be subcooled.

The supercooled refrigerant flows into the refrigerant heat exchanger 170 and may be once again subcooled while flowing through the second flow path 172. The supercooled refrigerant may be expanded in the third expansion part 135 and evaporated in the cooling heat exchanger 160. The evaporated refrigerant is introduced into the compressors 110 and 120.

On the other hand, in the composite system 10, the second branch portion for branching the refrigerant flowing into the air conditioning-side indoor heat exchanger 150 and the refrigerant flowing into the second flow path 172 of the refrigerant heat exchanger 170 ( 177). In summary, the second branch portion 177 is provided at the outlet side of the cold storage tank 200, and the refrigerant discharged from the cold storage tank 200 is the air conditioning side indoor heat exchange in the second branch portion 177. The branch 150 and the cooling heat exchanger 160 may be introduced into the branch.

As such, when using the cold heat source stored in the cold storage tank 200, the refrigerant in the cooling unit may be introduced into the cold storage tank 200 to be supercooled, and once again supercooled in the refrigerant heat exchanger 170, thereby cooling efficiency. Can improve.

4 is a system diagram showing a configuration of an air conditioning refrigeration combined system according to a second embodiment of the present invention.

Referring to FIG. 4, the complex system 10 according to the second exemplary embodiment of the present invention includes an air conditioning unit in which a first refrigerant cycle is operated and a cooling unit in which a second refrigerant cycle is operated.

In detail, the air conditioning unit includes a flow switching unit 305 for guiding the refrigerant discharged from the first compressor 302 and the first compressor 110 to the air conditioning-side indoor heat exchanger 330 or the outdoor heat exchanger 320. Included. The flow diverter 305 may include a four-way valve.

For example, in the cooling operation of the air conditioning unit, the refrigerant discharged from the compressor 302 flows to the outdoor heat exchanger 320 through the flow switching unit 305. On the other hand, in the heating operation of the air conditioning unit, the refrigerant discharged from the compressor 305 flows to the air conditioning-side indoor heat exchanger 330 through the flow switching unit 305.

The air conditioning unit includes an outdoor fan 326 as a blowing fan for forcing the flow of air at one side of the outdoor heat exchanger 320. The outdoor heat exchanger 320 includes a first heat exchanger 322 through which the refrigerant circulated in the air conditioning unit passes.

At the inlet side of the air conditioning-side indoor heat exchanger (330), a first expansion part (341) for reducing the refrigerant is provided. When the air conditioning unit is cooling, the refrigerant decompressed in the first expansion unit 341 may be evaporated in the air conditioning side indoor heat exchanger 330.

At the inlet side of the outdoor heat exchanger 320, a second expansion part 342 is provided to reduce the refrigerant. When the air conditioning unit is heating, the refrigerant decompressed in the second expansion unit 342 may be evaporated in the outdoor heat exchanger 320.

The cooling unit includes a second compressor 310 and a third compressor 312. The second compressor 310 may be a main compressor for compressing the refrigerant of the cooling unit, and the third compressor 312 may be, for example, when the operation of the second compressor 310 is restricted, for example, the second compressor ( When 310 fails, it may be a backup compressor that can be operated.

The cooling unit includes an outdoor heat exchanger 320 provided with a second heat exchanger 324 through which the refrigerant compressed by the second compressor 310 or the third compressor 312 flows. The compressed refrigerant may be condensed while passing through the second heat exchange part 324.

At the outlet side of the outdoor heat exchanger 320, a refrigerant heat exchanger 350 may be provided in which the refrigerant of the cooling unit may exchange heat with the refrigerant of the air conditioning unit. The refrigerant heat exchanger 350 includes a first flow passage 351 through which the refrigerant of the air conditioning unit flows and a second flow passage 353 through which the refrigerant of the cooling unit flows. For example, heat exchange between refrigerants may be performed by contact between the first flow path 351 and the second flow path 353.

The second flow path 353 is branched from the second inlet pipe 420 and connected to the refrigerant heat exchanger 350, and the refrigerant flows from the second heat exchanger 324 to the refrigerant heat exchanger 350. Guide.

An outlet side of the refrigerant heat exchanger 350 includes a receiver 360 capable of temporarily storing the refrigerant of the cooling unit. The amount of the refrigerant circulated in the cooling unit may be adjusted by adjusting the amount of the refrigerant stored in the receiver 360.

At the outlet side of the receiver 240, a cooling heat exchanger 370 for evaporating the refrigerant of the cooling unit is provided. The cooling heat exchanger 370 may be referred to as an indoor heat exchanger of the cooling unit. For convenience of description, the air conditioning-side indoor heat exchanger 330 may be referred to as a "first indoor heat exchanger" and the cooling heat exchanger 370 may be referred to as a "second indoor heat exchanger".

The refrigerant evaporated in the cooling heat exchanger 370 may flow into the second compressor 310 or the third compressor 312. In addition, the cold air heat-exchanged with the refrigerant in the cooling heat exchanger 370 may be supplied into a case (show case) for refrigerating or freezing an article.

At the inlet side of the refrigerant heat exchanger 350, a third expansion part 343 is provided to expand the refrigerant of the air conditioning unit. The refrigerant decompressed in the third expansion part 343 may flow into the first flow path 351 to exchange heat with the refrigerant of the cooling part, and may flow into the first compressor 302.

At the outlet side of the second heat exchanger 324, a fourth expansion part 345 is provided to reduce the refrigerant condensed in the outdoor heat exchanger 320. The refrigerant expanded in the fourth expansion part 345 may be introduced into the refrigerant heat exchanger 350 and supercooled while passing through the second flow path 353.

In addition, a fifth expansion part 349 is provided at an inlet side of the cooling heat exchanger 370. The refrigerant supercooled in the refrigerant heat exchanger 350 may be reduced in the fifth expansion part 349 and then evaporated in the cooling heat exchanger 370.

Meanwhile, the refrigerant circulating in the cooling unit may be introduced into the refrigerant heat exchanger 350 by bypassing the outdoor heat exchanger 320. When the cooling load required by the cooling unit is not large, the outdoor heat exchanger 320 may be bypassed to flow into the refrigerant heat exchanger 350.

To this end, the cooling unit is provided with a bypass passage 328 extending from the inlet side of the outdoor heat exchanger 320 to the outlet side of the outdoor heat exchanger 320. The bypass flow path 328 is provided with a flow control unit 347 for controlling the flow of the refrigerant. The flow control unit 347 may be a valve.

The refrigerant compressed by the second compressor 310 or the third compressor 312 may be introduced into the refrigerant heat exchanger 350 through the flow control unit 347. The refrigerant may be condensed in the refrigerant heat exchanger 350, decompressed in the fifth expansion part 349, and then evaporated in the cooling heat exchanger 370.

The complex system 10 includes a storage cooling tank 400. The first cooling pipe 400 is connected to the outlet side of the first heat exchange part 322 to guide the inflow of the refrigerant to one side of the cold storage tank 400 and the second heat exchange part. A second inlet pipe 420 is connected to the outlet side of 324 to guide the inflow of the refrigerant to the other side of the cold storage tank 400.

The first inlet pipe 410 is a pipe for guiding the inflow of the refrigerant passing through the first heat exchange unit 322 when storing the cold heat source in the cold storage tank 400, the second inlet pipe 420 is When using the cold heat source stored in the storage tank 400 may be understood as a pipe for guiding the inflow of the refrigerant passing through the second heat exchange unit 324.

The first inlet pipe 410 is provided with a first cold storage expansion part 415. The first storage cooling expansion unit 415 expands at least a portion of the refrigerant condensed in the first heat exchange unit 322 to enter the storage cooling tank 400 during the storage cooling. The refrigerant introduced into the storage tank 400 may be evaporated while being heat-exchanged with the heat exchange material of the storage tank 400. At this time, the heat exchange material may be cooled to store a cold heat source.

The second inlet pipe 420 is provided with a second cold storage expansion part 425. When the second cold storage expansion unit 425 uses the cold storage source that has been cooled, the second storage expansion expansion unit 425 expands at least a portion of the refrigerant condensed in the second heat exchange unit 324 to enter the storage cooling tank 400. The refrigerant introduced into the storage tank 400 may be supercooled by receiving a cooling heat source stored in the heat exchange material.

When the first cold storage expansion part 415 is opened and the refrigerant flows through the first inlet pipe 410, the second cold storage expansion part 425 may be closed. Therefore, the refrigerant may be restricted to flow the second inlet pipe 420. On the other hand, when the second cold storage expansion unit 425 is opened to allow the refrigerant to flow through the second inlet pipe 420, the first cold storage expansion unit 415 may be closed. Therefore, the refrigerant may be restricted to flow the first inlet pipe 410.

On the outlet side of the storage tank 200, check valves 231 and 233 which guide the one-way flow of the refrigerant are provided. The check valves 231 and 233 include a first check valve 231 communicating with the first inlet pipe 210 and a second check valve 233 communicating with the second inlet pipe 220.

Hereinafter, the flow of the refrigerant according to the present embodiment will be described.

5 is a system diagram showing a refrigerant flow when a cold heat source is stored in a cold storage tank in an air conditioning refrigeration complex system according to a second embodiment of the present invention, and FIG. 6 is an air conditioning refrigeration according to a second embodiment of the present invention. In a composite system, a system diagram showing refrigerant flow when using a cold heat source stored in a cold storage tank.

Referring to FIG. 5, a cooling heat source may be stored in the storage cooling tank 400 during the cooling operation of the air conditioning unit. That is, cold storage can be achieved. In one example, the cold storage may be performed during the summer night.

In detail, the refrigerant passing through the first compressor 302 is introduced into the first heat exchanger 322 of the outdoor heat exchanger 320 through the flow switching unit 305.

At least some of the refrigerant condensed in the first heat exchange part 322 flows into the storage tank 400 through the first inlet pipe 410. At this time, the refrigerant may be depressurized by the first cold storage expansion part 415. In the process of flowing the refrigerant storage tank 400, the refrigerant may be heat exchanged (evaporated) with a heat exchange material to store a cold heat source in the storage tank 400. The refrigerant evaporated in the storage tank 400 flows into the first compressor 302.

The remaining refrigerant among the refrigerant condensed in the first heat exchange part 322 flows into the first flow path 351 of the refrigerant heat exchanger 350 to exchange heat with the refrigerant of the second flow path 353. 1 flows back into the compressor 302.

Meanwhile, the refrigerant compressed in the second compressor 310 or the third compressor 312 is condensed in the second heat exchanger 324 of the outdoor heat exchanger 320 and is supercooled in the refrigerant heat exchanger 350. The pressure is reduced in the fifth expansion part 349 and then evaporated in the cooling heat exchanger 370. The evaporated refrigerant is again introduced into the second compressor 310 or the third compressor 312.

As such, when the cooling is performed in the storage tank 400, the refrigerant of the cooling unit circulates a refrigeration cycle, while the refrigerant of the air conditioning unit is evaporated (accumulated) in the storage tank 400 and the air conditioning-side indoor heat exchanger. It does not pass 150.

Referring to FIG. 6, in the cooling operation of the air conditioning unit, the refrigerant of the cooling unit may be supercooled by using the cooling heat source stored in the storage cooling tank 400. In one example, the use of the cold heat source stored in the cold storage may be made during the summer night.

In detail, the refrigerant passing through the first compressor 302 is introduced into the first heat exchanger 322 of the outdoor heat exchanger 320 through the flow switching unit 305.

The refrigerant condensed in the first heat exchange part 322 is introduced into the first expansion part 341 to be decompressed, and then evaporated in the air conditioning side indoor heat exchanger 330. Therefore, the cooling operation through the air conditioning unit can be made. Although not shown in the drawings, at least some of the refrigerant condensed in the first heat exchanger 322 may flow into the refrigerant heat exchanger 350.

Meanwhile, the refrigerant compressed by the second compressor 310 or the third compressor 312 is condensed in the second heat exchanger 324 of the outdoor heat exchanger 320 and the refrigerant flows through the second inlet pipe 225. It is introduced into the cold storage tank (400). At this time, the refrigerant may be depressurized by the second cold storage expansion part 425. In the process of flowing the refrigerant storage tank 400, the refrigerant may be exchanged with a heat exchange material to receive a cold heat source from the storage tank 400. Thus, the refrigerant can be subcooled.

The supercooled refrigerant may be expanded in the fifth expansion part 349 and evaporated in the cooling heat exchanger 370. The evaporated refrigerant is introduced into the compressors 110 and 120.

As such, when using the cold heat source stored in the cold storage tank 400, the refrigerant of the cooling unit may flow into the cold storage tank 400 to be supercooled, and the supercooled refrigerant may pass through the cooling heat exchanger 370. Therefore, there is an effect that the cooling efficiency can be improved.

10: combined system 110: first compressor
112: second compressor 120: outdoor heat exchanger
150: air conditioning side indoor heat exchanger 160: cooling heat exchanger
170: refrigerant heat exchanger 200: cold storage tank
210: first inlet pipe 215: first cold storage expansion part
220: second inlet pipe 225: second cold storage expansion unit
320: outdoor heat exchanger 322: first heat exchanger
324: second heat exchanger 350: refrigerant heat exchanger

Claims (14)

An air conditioning unit including a first compressor and an air conditioning-side indoor heat exchanger;
A cooling unit including a second compressor and a cooling heat exchanger;
An outdoor heat exchanger disposed at an outdoor side and configured to pass a refrigerant circulating the air conditioning unit and a refrigerant circulating the cooling unit; And
Is disposed on one side of the outdoor heat exchanger, and includes a blowing fan for blowing outdoor air to the outdoor heat exchanger,
A cold storage tank configured to store a cool heat source through the refrigerant passing through the outdoor heat exchanger;
A first inlet pipe allowing the refrigerant passing through the outdoor heat exchanger to flow into the storage cold storage tank and allowing the refrigerant evaporated in the storage cooling tank to flow into the first compressor or the second compressor during the storage cooling in the storage cooling tank;
A first storage cooling expansion unit provided in the first inflow pipe and expanding the refrigerant flowing into the storage cooling tank;
When using the cold heat source stored in the cold storage tank, the refrigerant passing through the outdoor heat exchanger is introduced into the cold storage tank, and the refrigerant supplied with the cold heat source from the cold storage tank flows into the cooling heat exchanger or the air conditioning side indoor heat exchanger. A second inlet pipe; And
Is provided in the second inlet pipe, and includes a second storage expansion expansion for expanding the refrigerant flowing into the storage tank,
And one of the first and second cold storage expansion portions is closed and the other is opened. The method of claim 1,
And the first accumulator expansion part is opened and the second accumulator expansion part is closed when the refrigeration is performed in the regenerator tank. The method of claim 1,
And utilizing the cold heat source stored in the cold storage tank, wherein the first cold storage expansion portion is closed and the second cold storage expansion portion is opened. The method of claim 1,
The outdoor heat exchanger,
And a second heat exchange part through which a refrigerant circulating through the air conditioning unit passes and a second heat exchange unit through which the refrigerant circulating through the cooling unit passes. The method of claim 4, wherein
And the first inlet pipe is connected to the first heat exchange part, and the second inlet pipe is connected to the second heat exchange part. The method of claim 1,
And the second inlet pipe is branched from the first inlet pipe and connected to the cold storage tank. The method of claim 1,
And a supercooler configured to exchange heat between the refrigerant circulating in the air conditioning unit and the refrigerant circulating in the cooling unit. The method of claim 7, wherein
The supercooler,
A first flow path evaporated while the refrigerant of the air conditioner flows; And
And a second flow path that is heat-exchanged with the first flow path and is supercooled in a flow of the refrigerant in the cooling unit. The method of claim 1,
And the first compressor and the second compressor are the same compressor. The method of claim 1,
A branch portion is provided on the outlet side of the cold storage tank,
The refrigerant discharged from the cold storage tank is branched into the air-conditioning-side indoor heat exchanger and the cooling heat exchanger in the branch portion flows in the air conditioning refrigeration system. delete delete delete delete

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