A refrigeration system and power device

Abstract

The application discloses a refrigeration system, which comprises a condensing heat exchanger, a first switch valve, an evaporating heat exchanger, an absorption refrigeration module and a compressor. The condensing heat exchanger, the switch valve and the evaporating heat exchanger are sequentially connected through pipelines. The absorption refrigeration module and the compressor are both connected between the condensing heat exchanger and the evaporating heat exchanger. In a circulation loop of the absorption refrigeration module, the condensing heat exchanger, the switch valve and the evaporating heat exchanger, when the absorption refrigeration module cannot generate gaseous working medium, the compressor can work. The refrigeration system can realize working medium circulation through a circulation loop of the compressor, the condensing heat exchanger, the switch valve and the evaporating heat exchanger, so that the evaporating heat exchanger can continuously reduce the temperature of a heating component.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration technology, and in particular to a refrigeration system and a power equipment. BACKGROUND

[0002] In existing power equipment such as automobiles, outdoor base stations, and data centers, heat generating components such as engines, motors, battery modules, and integrated circuit boards are generally deployed. With the long-time work of the power equipment, the heat generating components inside the power equipment will generate a large amount of heat. If the heat of the heat generating components inside the power equipment is timely transferred out, the normal work of the heat generating components will be affected, and even there is a safety hazard. Therefore, how to reduce the temperature of the heat generating components inside the power equipment is a problem to be solved at present. SUMMARY

[0003] To solve the above problems, in the embodiments of the present application, a refrigeration system and a power equipment are provided, an absorption refrigeration module, a condensing heat exchanger, a switch valve, and an evaporating heat exchanger are sequentially communicated through pipelines to form a closed loop. A compressor, a condensing heat exchanger, a switch valve, and an evaporating heat exchanger are sequentially communicated through pipelines to form a closed loop. When the absorption refrigeration module works normally, the evaporating heat exchanger of the refrigeration system cools the heat generating components through the circulating loop of “absorption refrigeration module→condensing heat exchanger→switch valve→evaporating heat exchanger”. When the absorption refrigeration module cannot work normally, the compressor is allowed to work. The evaporating heat exchanger of the refrigeration system cools the heat generating components through the circulating loop of “compressor→condensing heat exchanger→switch valve→evaporating heat exchanger”, so that the refrigeration system can continuously cool the heat generating components.

[0004] To this end, in the embodiments of the present application, the following technical solutions are adopted:

[0005] In a first aspect, the present application provides a refrigeration system, comprising: a condensing heat exchanger, a first switch valve, an evaporating heat exchanger, an absorption refrigeration module, and a compressor, the condensing heat exchanger, the first switch valve, and the evaporating heat exchanger are sequentially connected through pipelines, the condensing heat exchanger is connected through pipelines on the output end of the absorption refrigeration module and the output end of the compressor, for condensing the gas working medium output by the absorption refrigeration module and / or the compressor into liquid working medium; the evaporating heat exchanger is connected through pipelines on the input end of the absorption refrigeration module and the input end of the compressor, for evaporating the liquid working medium into gaseous working medium, inputting into the absorption refrigeration module and / or the compressor, and reducing the temperature of the heat generating components.

[0006] In this embodiment, the condensing heat exchanger, the switch valve and the evaporating heat exchanger are connected in sequence by pipelines. The absorption refrigeration module and the compressor are both connected between the condensing heat exchanger and the evaporating heat exchanger. In the circulation loop of the absorption refrigeration module, the condensing heat exchanger, the switch valve and the evaporating heat exchanger, when the absorption refrigeration module cannot produce gaseous working medium, the compressor can be operated. The refrigeration system can realize working medium circulation through the circulation loop of the compressor, the condensing heat exchanger, the switch valve and the evaporating heat exchanger, so that the evaporating heat exchanger can continuously reduce the temperature of the heat generating component.

[0007] In an embodiment, the condensing heat exchanger comprises a first heat exchange pipe and a second heat exchange pipe, one end of the first heat exchange pipe is connected to the first switch valve by a pipeline, the other end of the first heat exchange pipe is connected to the output end of the absorption refrigeration module and the output end of the compressor by a pipeline; both ends of the second heat exchange pipe are connected to the cold source by a pipeline.

[0008] In an embodiment, the evaporating heat exchanger comprises a third heat exchange pipe and a fourth heat exchange pipe, one end of the third heat exchange pipe is connected to the first switch valve by a pipeline, the other end of the third heat exchange pipe is connected to the input end of the absorption refrigeration module and the input end of the compressor by a pipeline; both ends of the second heat exchange pipe are connected to the heat generating component by a pipeline.

[0009] In an embodiment, the absorption refrigeration module comprises an absorber and a generator, the input end of the absorber is connected to the output end of the evaporating converter and the output end of the generator by a pipeline respectively, so that the solution of the first concentration input by the generator absorbs the gaseous working medium of the evaporating converter; the output end of the generator is connected to the condensing converter by a pipeline, and the input end of the generator is connected to the output end of the generator by a pipeline, the generator is used to heat the solution of the second concentration input by the absorber, and output the generated gaseous working medium to the condensing converter, the adsorbent content of the solution of the first concentration is higher than that of the solution of the second concentration.

[0010] In this embodiment, the absorber and the generator are connected by pipelines to form a circulation loop. The high concentration adsorbent solution in the absorber absorbs the gaseous working medium of the evaporating converter to form a low concentration adsorbent solution. The generator heats the low concentration adsorbent solution to produce gaseous working medium and form a high concentration adsorbent solution. The gaseous working medium generated by the generator is input into the condensing converter to realize the working medium circulation of the circulation loop of the refrigeration system.

[0011] In an embodiment, the absorption refrigeration module further comprises an intermediate heat exchanger, which is arranged on the pipeline between the absorber and the generator, and is used to transfer the heat of the first concentration solution output by the generator to the second concentration solution output by the absorber.

[0012] In this embodiment, the intermediate heat exchanger exchanges heat between the heated high concentration adsorbent solution output by the generator and the low concentration adsorbent solution flowing into the generator, so that the heat output by the generator is returned to the generator, thereby reducing the heat loss of the generator.

[0013] In an embodiment, the intermediate heat exchanger comprises a fifth heat exchange pipe and a sixth heat exchange pipe, one end of the fifth heat exchange pipe is connected to the output end of the absorber through a pipeline, and the other end of the fifth heat exchange pipe is connected to the input end of the generator through a pipeline; one end of the sixth heat exchange pipe is connected to the input end of the absorber through a pipeline, and the other end of the sixth heat exchange pipe is connected to the output end of the generator through a pipeline.

[0014] In an embodiment, the absorption refrigeration module further comprises a pump, which is arranged on the pipeline between the output end of the absorber and the fifth heat exchange pipe of the intermediate heat exchanger, and is used to pump the second concentration solution inside the absorber into the generator.

[0015] In this embodiment, a pump is arranged on the pipeline between the absorber and the generator. The pump provides power for the solution in the circulation loop of the absorption refrigeration module, so that the solution circulates in the circulation loop of the absorption refrigeration module.

[0016] In an embodiment, the absorption refrigeration module further comprises a second switch valve, which is arranged on the pipeline between the sixth heat exchange pipe of the intermediate heat exchanger and the input end of the absorber, and is used to convert the first concentration solution inside the generator into a first concentration solution in the form of spray.

[0017] In this embodiment, a switch valve is arranged on the pipeline between the absorber and the generator. The refrigeration system can adjust the opening degree of the switch valve, so that the liquid high concentration adsorbent solution forms a high concentration adsorbent solution in the form of spray and flows into the absorber. The high concentration adsorbent solution in the form of spray can better absorb the gaseous working medium.

[0018] In an embodiment, the refrigerant inside the absorption refrigeration module is the working medium of the refrigeration system.

[0019] In this embodiment, the working medium of the refrigeration system is the same as the refrigerant inside the absorption refrigeration module, which can reduce the complexity of the solution inside the absorption refrigeration module and reduce the cost of the refrigeration system.

[0020] In an embodiment, the boiling point of the refrigerant inside the absorption refrigeration module is lower than the boiling point of the absorbent inside the absorption refrigeration module.

[0021] In this embodiment, the boiling point of the refrigerant inside the absorption refrigeration module is lower than the boiling point of the absorbent, so that when gaseous working medium is generated inside the absorption refrigeration module, the absorbent will not evaporate, and the working medium in the circulation loop of the refrigeration system will not be contaminated.

[0022] In an embodiment, the refrigeration system further comprises an exhaust valve arranged on the pipeline between the condensing heat exchanger and the output end of the compressor, for exhausting gaseous working medium when the pressure in the pipeline between the condensing heat exchanger and the output end of the compressor is greater than a set threshold.

[0023] In this embodiment, an exhaust valve is arranged on the pipeline between the condensing heat exchanger and the output end of the compressor. When the compressor outputs a large amount of gaseous working medium, the exhaust valve can exhaust part of the gaseous working medium, so as to avoid the pressure in the circulation loop of the refrigeration system being too high and causing damage to the circulation loop.

[0024] In an embodiment, the working medium of the refrigeration system is water.

[0025] In this embodiment, the working medium inside each circulation loop of the refrigeration system is water, which can reduce the cost of the refrigeration system and improve the competitive advantage of the refrigeration system.

[0026] In an embodiment, the compressor is a negative pressure compressor.

[0027] In a second aspect, the embodiments of the present application provide an electric power equipment, comprising: at least one heat generating component, at least one refrigeration system as described in the first aspect, and an evaporating heat exchanger of the at least one refrigeration system being connected to the at least one heat generating component through a pipeline. The electric power equipment can be an electric vehicle, a base station, an outdoor cabinet, etc. The heat generating component can be an engine, a motor, a battery module, a PCB, an integrated circuit board, etc. The electric power equipment can be a data center, an office, a workshop, etc. The heat generating component can be a sealed space. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings used in the embodiments or prior art description are briefly introduced as follows.

[0029] Figure 1 FIG. 1 is a schematic diagram of the architecture of a refrigeration system provided in the embodiments of the present application;

[0030] Figure 2 FIG. 2 is a schematic diagram of the working medium circulation path of the refrigeration system when the absorption refrigeration module works normally;

[0031] Figure 3 Fig. 1 is a schematic diagram of a solution circulation path in an absorption refrigeration module according to an embodiment of the present application;

[0032] Figure 4 Fig. 2 is a schematic diagram of a refrigeration system when the compressor is working according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0034] In the description of the present application, the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0035] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or abutting connection or integral connection; for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the description of the present application, the term "and / or" is a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In this paper, the symbol " / " represents the relationship of or between the associated objects, for example, A / B represents A or B.

[0037] In the description of the present application, the terms "first" and "second" and the like are used to distinguish different objects, and are not used to describe the specific order of the objects. For example, the first response message and the second response message are used to distinguish different response messages, and are not used to describe the specific order of the response messages.

[0038] In the embodiments of the present application, the words "in an embodiment" or "for example" are used to represent an example, illustration or explanation. Any embodiment or design scheme described as "in an embodiment" or "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words "in an embodiment" or "for example" are intended to present the relevant concept in a specific way.

[0039] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0040] Figure 1 This is a schematic diagram of the architecture of a refrigeration system provided in an embodiment of this application. Figure 1 As shown, the refrigeration system 100 includes a condensing heat exchanger 110, a switching valve 120, an evaporating heat exchanger 130, an absorption refrigeration module 140, and a compressor 150. The condensing heat exchanger 110, switching valve 120, and evaporating heat exchanger 130 are connected sequentially via piping. The absorption refrigeration module 140 is connected between the condensing heat exchanger 110 and the evaporating heat exchanger 130 via piping, forming a loop of "absorption refrigeration module 140 → condensing heat exchanger 110 → switching valve 120 → evaporating heat exchanger 130". The compressor 150 is connected between the condensing heat exchanger 110 and the evaporating heat exchanger 130 via piping, forming a loop of "compressor 150 → condensing heat exchanger 110 → switching valve 120 → evaporating heat exchanger 130". The working fluid can flow in both loops, achieving heat transfer between the components. The piping can be divided into gaseous piping and liquid piping. Gaseous pipelines are pipelines that allow gaseous working fluids to flow through them. Liquid pipelines are pipelines that allow liquid working fluids to flow through them.

[0041] It should be noted that, in this embodiment, the working fluid inside the circulation loop of the refrigeration system 100 is water. In other embodiments, the working fluid may be other liquids, such as ammonia (NH3 / H2O), methyl ethyl ether (CH3-O-CH3), tetrafluoroethane (CH2FCF3), tetrafluoropropylene (C3H2F4), etc., or it may be a liquid composed of a mixture of various different components. This application does not limit the specific components used.

[0042] A condensing heat exchanger 110 is a device that condenses a gaseous working fluid into a liquid working fluid and transfers heat. In this embodiment, the condensing heat exchanger 110 has two heat exchange tubes inside. One end of one heat exchange tube (hereinafter referred to as the "first heat exchange tube") is connected to the switching valve 120 via a pipeline, and the other end is connected to the output end of the absorption refrigeration module 140 and the output end of the compressor 150 via a pipeline. The other heat exchange tube (hereinafter referred to as the "second heat exchange tube") of the condensing heat exchanger 110 is connected to a cold source via pipelines at both ends. In the circulation loop formed by the cold source and the second heat exchange tube of the condensing heat exchanger 110, the cold source can allow the low-temperature working fluid to flow into the second heat exchange tube of the condensing heat exchanger 110, so that the temperature of the working fluid in the second heat exchange tube of the condensing heat exchanger 110 is lower than the temperature of the working fluid in the first heat exchange tube.

[0043] In one embodiment, the gaseous working medium enters the first heat exchange tube of the condensation heat exchanger 110, the working medium of the first heat exchange tube of the condensation heat exchanger 110 exchanges heat with the working medium of the second heat exchange tube, and the heat of the gaseous working medium of the first heat exchange tube is transferred to the working medium of the second heat exchange tube. After the gaseous working medium of the first heat exchange tube releases heat, it condenses into a liquid working medium. At this time, the condensation heat exchanger 110 condenses the working medium of the first heat exchange tube into a liquid working medium, which can reduce the temperature of the working medium of the first heat exchange tube. In other embodiments, the cold source refers to a device that reduces heat, such as a refrigeration fan, a radiator, a cooling tower, a dry cooler, and the like.

[0044] The evaporation heat exchanger 130 refers to a device that evaporates a liquid working medium into a gaseous working medium and transfers heat. In the embodiments of the present application, two heat exchange tubes are arranged inside the evaporation heat exchanger 130. One end of one heat exchange tube (hereinafter referred to as "third heat exchange tube") of the evaporation heat exchanger 130 is connected to the on-off valve 120 through a pipeline, and the other end is connected to the input end of the absorption refrigeration module 140 and the input end of the compressor 150 through a pipeline. The two ends of the other heat exchange tube (hereinafter referred to as "fourth heat exchange tube") of the evaporation heat exchanger 130 are connected to the heat generating components through a pipeline. In the circulation loop formed by the fourth heat exchange tube of the evaporation heat exchanger 130 and the heat generating components, the heat generating components can flow the high-temperature working medium into the fourth heat exchange tube of the evaporation heat exchanger 130, so that the temperature of the working medium of the third heat exchange tube of the evaporation heat exchanger 130 is lower than that of the working medium of the fourth heat exchange tube. Among them, the heat generating components can be heat dissipation devices such as engines of automobiles, motors of new energy vehicles, battery modules, printed circuit boards (PCB), integrated circuit boards, etc.

[0045] In one embodiment, the liquid working medium or two-phase working medium flows into the third heat exchange tube of the evaporation heat exchanger 130, the working medium of the third heat exchange tube of the evaporation heat exchanger 130 exchanges heat with the working medium of the fourth heat exchange tube, and the heat of the working medium of the fourth heat exchange tube is transferred to the working medium of the third heat exchange tube. After the liquid working medium of the third heat exchange tube absorbs heat, it evaporates into a gaseous working medium. At this time, the evaporation heat exchanger 130 evaporates the liquid working medium of the third heat exchange tube into a gaseous working medium, which can reduce the temperature of the working medium of the fourth heat exchange tube. The cooled working medium of the fourth heat exchange tube of the evaporation heat exchanger 130 circulates into the heat generating components, which can reduce the temperature of the heat generating components.

[0046] The switch valve 120 is connected between the first heat exchange pipe of the condensing heat exchanger 110 and the third heat exchange pipe of the evaporating heat exchanger 130 through a pipeline. When the switch valve 120 is in an open state, the working medium in the first heat exchange pipe of the condensing heat exchanger 110 flows into the third heat exchange pipe of the evaporating heat exchanger 130. When the switch valve 120 is in a closed state, the working medium in the first heat exchange pipe of the condensing heat exchanger 110 cannot flow into the third heat exchange pipe of the evaporating heat exchanger 130. In other embodiments, the switch valve 120 is selected from an electronic expansion valve (EEV), a throttle valve (TV) or other types of switch valves, which are not limited in the present application.

[0047] In the embodiment of the present application, the working medium in the pipeline between the first heat exchange pipe of the condensing heat exchanger 110 and the switch valve 120 is in a liquid state. The refrigeration system 100 can adjust the temperature of the working medium flowing into the third heat exchange pipe of the evaporating heat exchanger 130 by controlling the opening degree of the switch valve 120.

[0048] In one embodiment, the opening degree of the switch valve 120 is relatively small. After the liquid working medium enters the pipeline between the switch valve 120 and the third heat exchange pipe of the evaporating heat exchanger 130, the pressure instantaneously decreases, and all or most of the liquid working medium is vaporized into gaseous working medium. When a large amount of working medium is vaporized, a large amount of heat is absorbed, and the temperature of the liquid working medium or the surrounding environment decreases relatively much. At this time, the effect of the switch valve 120 on reducing the temperature of the working medium is relatively obvious.

[0049] In one embodiment, the opening degree of the switch valve 120 is relatively large. After the liquid working medium enters the pipeline between the switch valve 120 and the third heat exchange pipe of the evaporating heat exchanger 130, the pressure changes relatively little, and a small amount or no liquid working medium is vaporized into gaseous working medium. When a small amount of working medium is vaporized, a small amount of heat is absorbed, and the temperature of the liquid working medium or the surrounding environment decreases relatively little. At this time, the effect of the switch valve 120 on reducing the temperature of the working medium is relatively weak.

[0050] The refrigeration system 100 can adjust the opening degree of the switch valve 120 to control the proportion of gaseous working medium and liquid working medium entering the third heat exchange pipe of the evaporating heat exchanger 130. The higher the proportion of gaseous working medium, the lower the temperature of the working medium flowing into the third heat exchange pipe of the evaporating heat exchanger 130 through the switch valve 120, which can improve the heat exchange speed between the third heat exchange pipe and the fourth heat exchange pipe of the evaporating heat exchanger 130. The higher the proportion of liquid working medium, the more heat can be absorbed when the liquid working medium is vaporized, which can improve the heat absorption of the working medium in the third heat exchange pipe of the evaporating heat exchanger 130 from the fourth heat exchange pipe.

[0051] In the embodiment, the refrigeration system 100 can adjust the opening degree of the switch valve 120, so that the working medium in the pipeline between the third heat exchange pipe of the evaporative heat exchanger 130 and the switch valve 120 is in a two-phase state. The proportion of the gaseous working medium and the liquid working medium in the two-phase state can be determined according to the temperature of the working medium in the fourth heat exchange pipe of the evaporative heat exchanger 130.

[0052] In the embodiment, the refrigeration system 100 can adjust the opening degree of the switch valve 120 to control the pressure on both sides of the switch valve 120. In one embodiment, when the opening degree of the switch valve 120 is small, the pressure in the circulation loop between the absorption refrigeration module 140, the condensing heat exchanger 110 and the switch valve 120 is relatively high. The pressure in the circulation loop between the switch valve 120, the evaporative heat exchanger 130 and the absorption refrigeration module 140 is relatively low. In one embodiment, when the opening degree of the switch valve 120 is small, the pressure in the circulation loop between the compressor 150, the condensing heat exchanger 110 and the switch valve 120 is relatively high. The pressure in the circulation loop between the switch valve 120, the evaporative heat exchanger 130 and the compressor 150 is relatively low.

[0053] The absorption refrigeration module 140 uses the mass fraction change of the working medium pair to complete the circulation of the refrigerant. As shown in Figure 2 The absorption refrigeration module 140 includes an absorber 141, a pump 142, an intermediate heat exchanger 143, a generator 144 and a switch valve 145. The output end of the absorber 141, the pump 142, the fifth heat exchange pipe of the intermediate heat exchanger 143 and the input end of the generator 144 are connected by a pipeline in sequence to form a flow path. The output end of the generator 144, the sixth heat exchange pipe of the intermediate heat exchanger 143, the switch valve 145 and the input end of the absorber 141 are connected by a pipeline in sequence to form a flow path. The absorber 141, the generator 144 and the two flow paths constitute a circulation loop.

[0054] The circulation loop of the absorption refrigeration module 140 is provided with a refrigerant and an absorbent. The boiling point of the refrigerant is lower than that of the absorbent. The refrigerant can be dissolved in the absorbent, or the absorbent can be dissolved in the refrigerant. In the embodiment, the refrigerant is the working medium of the refrigeration system 100, which can be water. The absorbent can be lithium bromide or other high-boiling solutes. The boiling point of water is 100℃. The boiling point of lithium bromide is 1265℃.

[0055] The absorber 141 is a device that absorbs gaseous refrigerant through a high-concentration absorbent solution. In the embodiment, the absorber 141 is connected to the third heat exchange pipe of the evaporative heat exchanger 130 by a pipeline. The gaseous working medium or two-phase working medium of the evaporative heat exchanger 130 flows into the absorber 141, and the high-concentration absorbent solution in the absorber 141 can absorb the gaseous working medium to form a dilute concentration absorbent solution, thereby converting the gaseous working medium into liquid working medium.

[0056] The pump 142 provides power for the solution in the circulation loop of the absorption refrigeration module 140, so as to realize circulation of the solution in the circulation loop of the absorption refrigeration module 140. In the embodiment of the present application, the pump 142 pumps the low-concentration absorbent solution in the absorber 141 into the generator 144.

[0057] The generator 144 refers to a device for releasing refrigerant by heating. In the embodiment of the present application, the generator 144 is connected to the first heat exchange pipe of the condensation heat exchanger 110 by a pipeline. The generator 144 is internally provided with a heater. The heater of the generator 144 heats the low-concentration absorbent solution flowing in, so that the refrigerant in the solution is vaporized into gaseous working medium. When the generator 144 generates gaseous working medium, the pressure in the generator 144 increases, so that the gaseous working medium flows into the first heat exchange pipe of the condensation heat exchanger 110. After the refrigerant in the low-concentration absorbent solution in the generator 144 is reduced, a high-concentration absorbent solution is formed. The pressure in the generator 144 is higher than that in the absorber 141, and the high-concentration absorbent solution in the generator 144 flows into the absorber 141 through the intermediate converter 143 and the switch valve 145.

[0058] In one embodiment, the heater of the generator 144 can be a heat source, such as an engine of a car, an electric motor of a new energy vehicle, a battery module, a printed circuit board (PCB), an integrated circuit board, or the like. The heater of the generator 144 can be an electric heater or other devices, which are not limited in the present application.

[0059] The intermediate converter 143 refers to a device for transferring heat. In the embodiment of the present application, the intermediate converter 143 is internally provided with two heat exchange pipes. One end of one heat exchange pipe (hereinafter referred to as “fifth heat exchange pipe”) of the intermediate converter 143 is connected to the pump 142 by a pipeline, and the other end is connected to the input end of the generator 144 by a pipeline. One end of the other heat exchange pipe (hereinafter referred to as “sixth heat exchange pipe”) of the intermediate converter 143 is connected to the output end of the generator 144 by a pipeline, and the other end is connected to the switch valve 145 by a pipeline.

[0060] The solution of the fifth heat exchange pipe of the intermediate converter 143 is the low-concentration absorbent solution of the absorber 141. The solution of the sixth heat exchange pipe of the intermediate converter 143 is the high-concentration absorbent solution of the generator 144. The intermediate converter 143 can exchange heat between the solution of the fifth heat exchange pipe and the solution of the sixth heat exchange pipe, transfer the heat of the high-concentration absorbent solution of the sixth heat exchange pipe to the low-concentration absorbent solution of the fifth heat exchange pipe, so as to return the heat flowing out of the generator 144 to the generator 144, and reduce the heat loss of the generator 144.

[0061] When the switch valve 145 is in the on state, the high-concentration absorbent solution of the generator 144 flows into the absorber 141. When the switch valve 145 is in the off state, the high-concentration absorbent solution of the generator 144 cannot flow into the absorber 141. In other embodiments, the switch valve 145 is selected from an EEV, a TV, or other types of switch valves, which are not limited in the present application.

[0062] In the embodiments of the present application, the refrigeration system 100 can adjust the opening of the switch valve 145 to form a high-concentration absorbent solution in a spray state from the liquid high-concentration absorbent solution, and then flow into the absorber 141. The high-concentration absorbent solution in the spray state can better absorb the gaseous working medium.

[0063] In one embodiment, the opening of the switch valve 145 is relatively small, and after the liquid high-concentration absorbent solution enters the pipeline between the switch valve 145 and the third heat exchange pipe of the absorber 141, the pressure instantaneously decreases, and the liquid high-concentration absorbent solution can be vaporized into a high-concentration absorbent solution in a spray state.

[0064] The output end of the compressor 150 is connected to the first heat exchange pipe of the condensation heat exchanger 110 through a pipeline, and the input end of the compressor 150 is connected to the third heat exchange pipe of the evaporation heat exchanger 130 through a pipeline. In the embodiments of the present application, the compressor 150 compresses the liquid working medium or the two-phase working medium under negative pressure to obtain the gaseous working medium, and then the gaseous working medium flows into the first heat exchange pipe of the condensation heat exchanger 110.

[0065] In the embodiments of the present application, the compressor 150 is selected as a negative pressure compressor. During the operation of the negative pressure compressor, the volume of the suction chamber gradually increases to form a negative pressure. The liquid working medium or the two-phase working medium enters the suction chamber under the action of the pressure difference. The liquid working medium vaporizes into the gaseous working medium under the action of the negative pressure. The suction chamber gradually compresses the volume to allow the gaseous working medium to flow into the first heat exchange pipe of the condensation heat exchanger 110.

[0066] The refrigeration system 100 further comprises an exhaust valve 160. The exhaust valve 160 is connected between the compressor 150 and the first heat exchange pipe of the condensation heat exchanger 110 through a pipeline. When the exhaust valve 160 is in the off state, the gaseous working medium in the pipeline between the compressor 150 and the first heat exchange pipe of the condensation heat exchanger 110 cannot be discharged to the outside. When the exhaust valve 160 is in the on state, the gaseous working medium in the pipeline between the compressor 150 and the first heat exchange pipe of the condensation heat exchanger 110 can be discharged to the outside.

[0067] In one embodiment, when the compressor 150 outputs the gaseous working medium to the first heat exchange tube of the condensation heat exchanger 110, the pressure of the pipeline between the compressor 150 and the first heat exchange tube of the condensation heat exchanger 110 can be relatively high. When the pressure of the pipeline between the compressor 150 and the first heat exchange tube of the condensation heat exchanger 110 is greater than a set threshold, the exhaust valve 160 is in an on state, so that the gaseous working medium in the pipeline between the compressor 150 and the first heat exchange tube of the condensation heat exchanger 110 is discharged to the outside, thereby reducing the pressure of the pipeline between the compressor 150 and the first heat exchange tube of the condensation heat exchanger 110.

[0068] In the embodiment, the first heat exchange tube of the condensation heat exchanger 110, the switch valve 120, the third heat exchange tube of the evaporation heat exchanger 130, and the absorption refrigeration module 140 are sequentially connected through pipelines to form a closed loop. The fourth heat exchange tube of the evaporation heat exchanger 130 is connected to the heat generating component through a pipeline. After the absorption refrigeration module 140 absorbs the gaseous working medium of the third heat exchange tube of the evaporation heat exchanger 130, the absorption refrigeration module 140 outputs the gaseous working medium to the first heat exchange tube of the condensation heat exchanger 110. The refrigeration system 100 cools the heat generating component through the circulation loop of "absorption refrigeration module 140→first heat exchange tube of the condensation heat exchanger 110→switch valve 120→third heat exchange tube of the evaporation heat exchanger 130".

[0069] The first heat exchange tube of the condensation heat exchanger 110, the switch valve 120, the third heat exchange tube of the evaporation heat exchanger 130, and the compressor 150 are sequentially connected through pipelines to form a closed loop. When the absorption refrigeration module 140 cannot work, the refrigeration system 100 cools the heat generating component through the circulation loop of "compressor 150→first heat exchange tube of the condensation heat exchanger 110→switch valve 120→third heat exchange tube of the evaporation heat exchanger 130", so that the refrigeration system 100 can continuously cool the heat generating component.

[0070] In the embodiment, the refrigeration system 100 can simultaneously circulate the circulation loop of "absorption refrigeration module 140→first heat exchange tube of the condensation heat exchanger 110→switch valve 120→third heat exchange tube of the evaporation heat exchanger 130" and the circulation loop of "compressor 150→first heat exchange tube of the condensation heat exchanger 110→switch valve 120→third heat exchange tube of the evaporation heat exchanger 130", so that the refrigeration effect of the refrigeration system 100 can be improved, and the energy consumption of the refrigeration system 100 can be reduced.

[0071] As Figure 2As shown, when the absorption refrigeration module 140 is operating normally, the high-concentration absorbent solution in the absorber 141 of the absorption refrigeration module 140 can absorb the gaseous working fluid in the third heat exchange tube of the evaporation heat exchanger 130, forming a dilute absorbent solution, thus converting the gaseous working fluid into a liquid working fluid. The pump 142 of the absorption refrigeration module 140 pumps the low-concentration absorbent solution inside the absorber 141 into the generator 144.

[0072] The generator 144 of the absorption refrigeration module 140 heats the flowing solution of dilute absorbent, causing the refrigerant in the solution to vaporize into a gaseous working fluid. When the generator 144 generates the gaseous working fluid, the pressure inside the generator 144 increases, causing the gaseous working fluid to flow into the first heat exchange tube of the condenser heat exchanger 110.

[0073] In the circulation loop between the cold source and the second heat exchange tube of the condenser heat exchanger 110, the low-temperature working fluid from the cold source flows into the second heat exchange tube of the condenser heat exchanger 110. The gaseous working fluid from the first heat exchange tube of the condenser heat exchanger 110 exchanges heat with the low-temperature working fluid from the second heat exchange tube. The gaseous working fluid from the first heat exchange tube of the condenser heat exchanger 110 condenses into a liquid working fluid. The liquid working fluid from the first heat exchange tube of the condenser heat exchanger 110 flows into the on / off valve 120.

[0074] The refrigeration system 100 adjusts the opening of the switching valve 120 to convert the liquid working fluid into a two-phase working fluid. The two-phase working fluid flows into the third heat exchange tube of the evaporator heat exchanger 130. The two-phase working fluid in the third heat exchange tube of the evaporator heat exchanger 130 exchanges heat with the working fluid in the fourth heat exchange tube. The liquid working fluid in the third heat exchange tube of the evaporator heat exchanger 130 evaporates into a gaseous working fluid. The gaseous working fluid in the third heat exchange tube of the evaporator heat exchanger 130 flows into the absorber 141 of the absorption refrigeration module 140.

[0075] In the circulation loop between the fourth heat exchange tube of the evaporator heat exchanger 130 and the heating element, the working fluid cooled by the fourth heat exchange tube of the evaporator heat exchanger 130 flows into the heating element, which can reduce the temperature of the heating element.

[0076] like Figure 3 As shown, the generator 144 of the absorption refrigeration module 140 heats the incoming dilute absorbent solution, causing the refrigerant in the solution to vaporize into a gaseous working fluid. After the refrigerant in the low-concentration absorbent solution inside the generator 144 decreases, a high-concentration absorbent solution is formed. The pressure inside the generator 144 is greater than the pressure inside the absorber 141, and the high-concentration absorbent solution inside the generator 144 flows into the switching valve 145 through the intermediate converter 143.

[0077] The refrigeration system 100 adjusts the opening of the switching valve 145 of the absorption refrigeration module 140 to form a spray of high-concentration liquid absorbent solution, which then flows into the absorber 141. The spray of high-concentration absorbent solution from the absorber 141 of the absorption refrigeration module 140 can absorb the gaseous working fluid from the third heat exchange tube of the evaporation heat exchanger 130.

[0078] like Figure 4 As shown, when the absorption refrigeration module 140 is not working, the refrigeration system 100 stops the circulation of the loop from "absorption refrigeration module 140 → first heat exchange tube of condenser heat exchanger 110 → on / off valve 120 → third heat exchange tube of evaporator heat exchanger 130" and allows the compressor 150 to operate. The refrigeration system 100 allows the circulation of the loop from "compressor 150 → first heat exchange tube of condenser heat exchanger 110 → on / off valve 120 → third heat exchange tube of evaporator heat exchanger 130" to operate.

[0079] After the compressor 150 draws in the liquid or two-phase working fluid from the first heat exchange tube of the condensing heat exchanger 110, it compresses the liquid or two-phase working fluid under negative pressure to obtain a gaseous working fluid. The compressor 150 then allows the gaseous working fluid to flow into the first heat exchange tube of the condensing heat exchanger 110.

[0080] In the circulation loop between the cold source and the second heat exchange tube of the condenser heat exchanger 110, the low-temperature working fluid from the cold source flows into the second heat exchange tube of the condenser heat exchanger 110. The gaseous working fluid from the first heat exchange tube of the condenser heat exchanger 110 exchanges heat with the low-temperature working fluid from the second heat exchange tube. The gaseous working fluid from the first heat exchange tube of the condenser heat exchanger 110 condenses into a liquid working fluid. The liquid working fluid from the first heat exchange tube of the condenser heat exchanger 110 flows into the on / off valve 120.

[0081] The refrigeration system 100 adjusts the opening of the switching valve 120 to convert the liquid working fluid into a two-phase working fluid. The two-phase working fluid flows into the third heat exchange tube of the evaporator heat exchanger 130. The two-phase working fluid in the third heat exchange tube of the evaporator heat exchanger 130 exchanges heat with the working fluid in the fourth heat exchange tube. The liquid working fluid in the third heat exchange tube of the evaporator heat exchanger 130 evaporates into a gaseous working fluid. The liquid or two-phase working fluid in the third heat exchange tube of the evaporator heat exchanger 130 is then drawn back into the compressor 150.

[0082] In the circulation loop between the fourth heat exchange tube of the evaporator heat exchanger 130 and the heating element, the working fluid cooled by the fourth heat exchange tube of the evaporator heat exchanger 130 flows into the heating element, which can reduce the temperature of the heating element. When the absorption refrigeration module 140 is not working, the refrigeration system 100 allows the compressor 150 to work, so that the refrigeration system 100 can continuously cool the heating element.

[0083] In the embodiments of the present application, the working medium inside each circulating loop in the refrigeration system 100 adopts water, which can reduce the cost of the refrigeration system 100 and improve the competitive advantage of the refrigeration system 100. As a pure natural green working medium, water has a global warming potential (GWP) of zero, making the refrigeration system 100 more in line with the current trend of carbon peak and carbon neutral. Both circulating loops of the refrigeration system 100 use water as the working medium, which can improve the coefficient of performance (COP) of the refrigeration system 100 by more than 16% compared to the traditional refrigeration system using chilled water as the working medium.

[0084] The embodiments of the present application provide an electric power equipment, which comprises a heat generating component and a refrigeration system 100 as described above. Figures 1-4 The heat generating component can be provided with a working medium flow loop inside, and the working medium flow loop of the heat generating component is connected with the fourth heat exchange pipe of the evaporative heat exchanger 130 of the refrigeration system 100, forming a circulating loop. The working medium cooled by the evaporative heat exchanger 130 of the refrigeration system 100 flows into the heat generating component, which can reduce the temperature of the heat generating component.

[0085] The electric power equipment can be an electric vehicle, a base station, an outdoor cabinet, etc. as we understand. The heat generating component can be an engine, a motor, a battery module, a PCB, an integrated circuit board, etc. The electric power equipment can be a data center, an office, a workshop, etc. in a broad sense. The heat generating component can be a sealed space. Since the electric power equipment comprises the refrigeration system, the electric power equipment has all or part of the advantages of the refrigeration system.

[0086] The types, numbers, shapes, connection modes, structures, etc. of the components of the refrigeration system provided in the embodiments of the present application are not limited to the above embodiments, and any technical solution realized under the principle of the present application is within the protection scope of the present application. Any one or more embodiments or diagrams in the specification are within the protection scope of the present application in a suitable manner.

[0087] The types, numbers, shapes, mounting modes, structures, etc. of the components of the electric power equipment provided in the embodiments of the present application are not limited to the above embodiments, and any technical solution realized under the principle of the present application is within the protection scope of the present application. Any one or more embodiments or diagrams in the specification are within the protection scope of the present application in a suitable manner. The electronic equipment can be a power supply module, a new energy vehicle, an outdoor base station, an outdoor cabinet or other equipment, which is not limited in the present application.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application. Those skilled in the art should understand that, although the present application has been described in detail with reference to the foregoing embodiments, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent replacements can be made to some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims

1. A refrigeration system characterized by, The application relates to a heat exchange system for a heat generating component, comprising: a condensing heat exchanger, a first switch valve, an evaporating heat exchanger, an absorption refrigeration module and a compressor, wherein the condensing heat exchanger, the first switch valve and the evaporating heat exchanger are sequentially connected through pipelines, the condensing heat exchanger is connected to the output end of the absorption refrigeration module and the output end of the compressor through pipelines respectively, and is used for condensing the gaseous working medium output by the absorption refrigeration module and the compressor into liquid working medium; the evaporating heat exchanger is connected to the input end of the absorption refrigeration module and the input end of the compressor through pipelines respectively, and is used for evaporating the liquid working medium into gaseous working medium, inputting the gaseous working medium into the absorption refrigeration module or the compressor when the absorption refrigeration module cannot work, and reducing the temperature of the heat generating component. the condensing heat exchanger comprises first heat exchange pipes and second heat exchange pipes, 2. The refrigeration system of claim 1, wherein, one end of the first heat exchange pipes is connected to the first switch valve through a pipeline, and the other end of the first heat exchange pipes is connected to the output end of the absorption refrigeration module and the output end of the compressor through a pipeline; and two ends of the second heat exchange pipes are connected to a cold source through pipelines. the evaporating heat exchanger comprises third heat exchange pipes and fourth heat exchange pipes, 3. The refrigeration system of claim 1 or 2, wherein, one end of the third heat exchange pipes is connected to the first switch valve through a pipeline, and the other end of the third heat exchange pipes is connected to the input end of the absorption refrigeration module and the input end of the compressor through a pipeline; and two ends of the fourth heat exchange pipes are connected to the heat generating component through pipelines. the absorption refrigeration module comprises an absorber and a generator, 4. The refrigeration system of any of claims 1-3, wherein, the input end of the absorber is connected to the output end of the evaporating heat exchanger and the output end of the generator through pipelines respectively, and is used for absorbing the gaseous working medium of the evaporating heat exchanger by the solution of the first concentration input by the generator; the output end of the generator is connected to the condensing heat exchanger through a pipeline, the input end of the generator is connected to the output end of the generator through a pipeline, the generator is used for heating the solution of the second concentration input by the absorber, and the generated gaseous working medium is output into the condensing heat exchanger, and the adsorbent content of the solution of the first concentration is higher than that of the solution of the second concentration. the absorption refrigeration module further comprises an intermediate heat exchanger, 5. The refrigeration system of claim 4, wherein, the intermediate heat exchanger is arranged on the pipeline between the absorber and the generator, and is used for transferring the heat of the solution of the first concentration output by the generator to the solution of the second concentration output by the absorber. the intermediate heat exchanger comprises fifth heat exchange pipes and sixth heat exchange pipes, 6. The refrigeration system of claim 5, wherein, one end of the fifth heat exchange pipes is connected to the output end of the absorber through a pipeline, and the other end of the fifth heat exchange pipes is connected to the input end of the generator; one end of the sixth heat exchange pipes is connected to the input end of the absorber through a pipeline, and the other end of the sixth heat exchange pipes is connected to the output end of the generator. the absorption refrigeration module further comprises a pump, 7. The refrigeration system of any of claims 4-6, wherein, the pump is arranged on the pipeline between the output end of the absorber and the fifth heat exchange pipes of the intermediate heat exchanger, and is used for pumping the solution of the second concentration in the absorber into the generator. ​ 8. The refrigeration system of any of claims 4-7, wherein, The absorption refrigeration module further comprises a second switch valve, The second switch valve is arranged on a pipeline between a sixth heat exchange pipe of the intermediate heat exchanger and an input end of the absorber, and is used for converting the solution of the first concentration inside the generator into the solution of the first concentration in the form of spray.

9. The refrigeration system of any of claims 4-8, wherein, The refrigerant inside the absorption refrigeration module is the working medium of the refrigeration system.

10. The refrigeration system of any of claims 4-9, wherein, The boiling point of the refrigerant inside the absorption refrigeration module is lower than the boiling point of the absorbent inside the absorption refrigeration module.

11. The refrigeration system of any of claims 1-10, wherein, The refrigeration system further comprises an exhaust valve, The exhaust valve is arranged on a pipeline between the condensation heat exchanger and an output end of the compressor, and is used for exhausting the gaseous working medium when the pressure of the pipeline between the condensation heat exchanger and the output end of the compressor is greater than a set threshold.

12. The refrigeration system of any of claims 1-11, wherein, The working medium of the refrigeration system is water.

13. The refrigeration system of any of claims 1-12, wherein, The compressor is a negative pressure compressor.

14. An electrical power device, characterized by Comprise: At least one heat generating component, At least one refrigeration system according to any one of claims 1-13, the evaporation heat exchangers of the at least one refrigeration system are respectively connected to the at least one heat generating component through pipelines.

Images