WO2024082675A1

WO2024082675A1 - Refrigeration system and power device

Info

Publication number: WO2024082675A1
Application number: PCT/CN2023/102181
Authority: WO
Inventors: 宋金良
Original assignee: 华为数字能源技术有限公司
Priority date: 2022-10-20
Filing date: 2023-06-25
Publication date: 2024-04-25
Also published as: CN115666076A

Abstract

A refrigeration system, comprising a condensation heat exchanger, a switch valve, an evaporation heat exchanger, an adsorption bed and a compressor, wherein the condensation heat exchanger, the switch valve and the evaporation heat exchanger are sequentially connected by means of a pipeline; the adsorption bed and the compressor are both connected between the condensation heat exchanger and the evaporation heat exchanger; and in a circulation loop formed by the adsorption bed, the condensation heat exchanger, the switch valve and the evaporation heat exchanger, when the adsorption bed cannot generate a gaseous working medium, the compressor can work. The refrigeration system can achieve working medium circulation by means of the circulation loop formed by the compressor, the condensation heat exchanger, the switch valve and the evaporation heat exchanger, such that the evaporation heat exchanger can uninterruptedly reduce the temperature of heating components.

Description

Refrigeration system and electric equipment

This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on October 20, 2022, with application number 202211284888.7 and application name “A Refrigeration System and Power Equipment”, the entire contents of which are incorporated by reference in this application.

Technical Field

The present invention relates to the field of refrigeration technology, and in particular to a refrigeration system and electric power equipment.

Background technique

Existing power equipment such as automobiles, outdoor base stations, and data centers generally have heat-generating components, such as engines, motors, battery modules, and integrated circuit boards. As power equipment works for a long time, the heat-generating components inside the power equipment will generate a lot of heat. If the heat of the heat-generating components inside the power equipment is not transferred out in time, it will affect the normal operation of the heat-generating components and even pose a safety hazard. Therefore, how to reduce the temperature of the heat-generating components inside the power equipment is an urgent problem to be solved.

Summary of the invention

In order to solve the above-mentioned problems, a refrigeration system and an electric power device are provided in an embodiment of the present application, wherein the adsorption bed, the condensing heat exchanger, the switching valve and the evaporative heat exchanger are connected in sequence through pipelines to form a closed loop. The compressor, the condensing heat exchanger, the switching valve and the evaporative heat exchanger are connected in sequence through pipelines to form a closed loop. When the temperature of the working fluid input by the heat source to the adsorption bed is greater than the desorption temperature of the adsorbent inside the adsorption bed, the evaporative heat exchanger of the refrigeration system cools the heat-generating components through a circulation loop of "adsorption bed → condensing heat exchanger → switching valve → evaporative heat exchanger". When the temperature of the working fluid input by the heat source to the adsorption bed is not greater than the desorption temperature of the adsorbent inside the adsorption bed, the evaporative heat exchanger of the refrigeration system cools the heat-generating components through a circulation loop of "compressor → condensing heat exchanger → switching valve → evaporative heat exchanger", so that the refrigeration system can cool the heat-generating components uninterruptedly.

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

In a first aspect, the present application provides a refrigeration system, comprising: a condensing heat exchanger, a switching valve, an evaporating heat exchanger, an adsorption bed and a compressor, wherein the condensing heat exchanger, the switching valve and the evaporating heat exchanger are connected in sequence through pipelines, and the condensing heat exchanger is respectively connected to the output end of the adsorption bed and the output end of the compressor through pipelines, and is used to condense the gaseous working fluid output by the adsorption bed and/or the compressor into a liquid working fluid; the evaporating heat exchanger is respectively connected to the input end of the adsorption bed and the input end of the compressor through pipelines, and is used to evaporate the liquid working fluid into a gaseous working fluid, input it into the adsorption bed and/or the compressor, and reduce the temperature of the heat-generating components.

In this embodiment, the condensing heat exchanger, the switch valve and the evaporating heat exchanger are connected in sequence through pipelines. The adsorption bed and the compressor are both connected between the condensing heat exchanger and the evaporating heat exchanger. In the circulation loop of the adsorption bed, the condensing heat exchanger, the switch valve and the evaporating heat exchanger, when the adsorption bed cannot produce a gaseous working fluid, the compressor can be operated. The refrigeration system can realize the working fluid 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 components.

In one embodiment, the refrigeration system also includes a heat source and a cold source, and the adsorption bed is respectively connected to the heat source and the cold source through pipelines, so as to output gaseous working fluid to the condensing heat exchanger after the high-temperature working fluid flows into the heat source; or to absorb liquid working fluid or two-phase working fluid into the evaporative heat exchanger after the low-temperature working fluid flows into the cold source.

In this embodiment, a heat source and a cold source are connected to the adsorption bed. When the high-temperature working fluid of the heat source flows into the adsorption bed, the adsorbent inside the adsorption bed absorbs heat to generate a gaseous working fluid, and the gaseous working fluid is input into the condensing heat exchanger to realize the working fluid circulation of the circulation loop of the refrigeration system. When the low-temperature working fluid of the cold source flows into the adsorption bed, the adsorbent inside the adsorption bed cools down and absorbs the gaseous working fluid inside the adsorption bed, reducing the pressure inside the adsorption bed, so that the gaseous working fluid of the evaporation converter enters the adsorption bed, realizing the working fluid circulation of the circulation loop of the refrigeration system.

In one embodiment, the temperature of the working fluid input by the heat source is greater than the desorption temperature of the adsorbent inside the adsorption bed, and the desorption temperature is the temperature at which the adsorbent releases the gaseous working fluid.

In this embodiment, the heat source inputs a high-temperature working fluid into the adsorption bed, which can heat the adsorbent inside the adsorption bed. When the temperature of the high-temperature working fluid of the heat source is greater than the desorption temperature of the adsorbent inside the adsorption bed, the adsorbent can release the gaseous working fluid after reaching the desorption temperature, so that the adsorption bed can generate the gaseous working fluid, allowing the working fluid of the circulation loop of the refrigeration system to circulate.

In one embodiment, the condensing heat exchanger includes a first heat exchange tube and a second heat exchange tube, one end of the first heat exchange tube is connected to the switch valve through a pipeline, and the other end of the first heat exchange tube is connected to the output end of the adsorption bed and the output end of the compressor through a pipeline; both ends of the second heat exchange tube are connected to the cold source through pipelines.

In one embodiment, the evaporative heat exchanger includes a third heat exchange tube and a fourth heat exchange tube, one end of the third heat exchange tube is connected to the pipeline The third heat exchange tube is connected to the switch valve, and the other end of the third heat exchange tube is connected to the input end of the adsorption bed and the input end of the compressor through a pipeline; the two ends of the second heat exchange tube are connected to the heat generating component through a pipeline.

In one embodiment, the refrigeration system also includes an exhaust valve, which is arranged on the pipeline between the condensing heat exchanger and the output end of the compressor, and is used to discharge the gaseous working medium when the pressure of the pipeline between the condensing heat exchanger and the output end of the compressor is greater than a set threshold.

In this embodiment, an exhaust valve is provided 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 discharge part of the gaseous working medium to avoid excessive pressure in the circulation loop of the refrigeration system, which may cause damage to the circulation loop.

In one embodiment, the refrigeration system further comprises a stop valve, which is disposed on a pipeline between the condensing heat exchanger and an output end of the adsorption bed and is used to control the flow of gaseous working fluid from the adsorption bed to the condensing heat exchanger.

In this embodiment, a stop valve is provided on the pipeline between the condensing heat exchanger and the output end of the adsorption bed. When the adsorbent of the adsorption bed is adsorbing, the pressure inside the adsorption bed decreases, and the stop valve can be closed to prevent the adsorption bed from back-absorbing the gaseous working medium of the condensing heat exchanger, causing the circulation loop of the refrigeration system to be unable to circulate.

In one embodiment, the working fluid of the refrigeration system is water.

In this embodiment, water is used as the working medium in each circulation loop of the refrigeration system, which can reduce the cost of the refrigeration system and improve the competitive advantage of the refrigeration system.

In one embodiment, the adsorbent inside the adsorption bed is zeolite or silica gel.

In this embodiment, water and zeolite, water and silica gel are good adsorption working medium pairs, and zeolite and silica gel can better heat or cool water.

In one embodiment, the compressor is a negative pressure compressor.

In a second aspect, an embodiment of the present application provides an electric device, comprising: at least one heat-generating component, at least one refrigeration system as may be implemented in the first aspect, and the evaporative heat exchanger of the at least one refrigeration system is respectively connected to the at least one heat-generating component through pipelines. Among them, the electric device can be electric vehicles, base stations, outdoor cabinets and other equipment. The heat-generating component can be an engine, a motor, a battery module, a PCB, an integrated circuit board and other components. The electric device can be a data center, an office, a workshop, etc. The heat-generating component can be a closed space.

BRIEF DESCRIPTION OF THE DRAWINGS

The following is a brief introduction to the drawings required for describing the embodiments or prior art.

FIG1 is a schematic diagram of the architecture of a refrigeration system provided in an embodiment of the present application;

FIG2 is a schematic diagram of the structure of an adsorption bed;

3 is a schematic diagram of a working fluid circulation path of a refrigeration system when a heat source according to an embodiment of the present application provides a high-temperature working fluid to an adsorption bed;

4 is a schematic diagram of a working medium circulation path of a refrigeration system when a cold source provides a low-temperature working medium to an adsorption bed in an embodiment of the present application;

FIG5 is a schematic diagram of the operation of the refrigeration system when the compressor provided in an embodiment of the present application is working.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

In the description of the present application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

In the description of this application, the term "and/or" is a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The symbol "/" herein indicates that the associated objects are in an or relationship, for example, A/B means A or B.

In the description of this application, the terms "first" and "second" are used to distinguish different objects rather than to describe a specific order of objects. For example, a first response message and a second response message are used to distinguish different response messages rather than to describe a specific order of response messages.

In the embodiments of the present application, the words "in one embodiment" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design scheme described in the embodiments of the present application as "in one embodiment" or "for example" should not be interpreted as being superior to other embodiments or designs. Specifically, the use of words such as "in one embodiment" or "for example" is intended to present the relevant concepts in a specific way.

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

FIG1 is a schematic diagram of the architecture of a refrigeration system provided in an embodiment of the present application. As shown in FIG1 , the refrigeration system 100 includes a condensing heat exchanger 110, a switch valve 120, an evaporating heat exchanger 130, an adsorption bed 140, a compressor 150, a heat source 160, and a cold source 170. The condensing heat exchanger 110, the switch valve 120, and the evaporating heat exchanger 130 are connected in sequence through pipelines. The adsorption bed 140 is connected between the condensing heat exchanger 110 and the evaporating heat exchanger 130 through a pipeline, forming a circulation loop of "adsorption bed 140→condensing heat exchanger 110→switch valve 120→evaporating heat exchanger 130". The compressor 150 is connected between the condensing heat exchanger 110 and the evaporating heat exchanger 130 through a pipeline, forming a circulation loop of "compressor 150→condensing heat exchanger 110→switch valve 120→evaporating heat exchanger 130". The working fluid can flow in the two circulation loops to achieve heat transfer between the various components. Among them, pipelines can be divided into gas pipelines and liquid pipelines. Gas pipelines refer to pipelines that allow gaseous working fluids to flow. Liquid pipelines refer to pipelines that allow liquid working fluids to flow.

It should be noted that in the embodiment of the present application, the working fluid in the circulation loop of the refrigeration system 100 is water. In other embodiments, the working fluid may also be other liquids, such as ammonia (NH ₃ /H ₂ O), methyl ethyl ether (CH ₃ -O-CH ₃ ), tetrafluoroethane (CH ₂ FCF ₃ ), tetrafluoropropylene (C ₃ H ₂ F ₄ ), etc., or a liquid mixed with multiple different components, which is not limited in the present application.

The condensing heat exchanger 110 refers to a device that condenses a gaseous working medium into a liquid working medium and transfers heat. In the embodiment of the present application, two heat exchange tubes are arranged inside the condensing heat exchanger 110. One end of a heat exchange tube of the condensing heat exchanger 110 (hereinafter referred to as the "first heat exchange tube") is connected to the switch valve 120 through a pipeline, and the other end is connected to the output end of the adsorption bed 140 and the output end of the compressor 150 through a pipeline. Both ends of another heat exchange tube of the condensing heat exchanger 110 (hereinafter referred to as the "second heat exchange tube") are connected to the cold source 170 through a pipeline. In the circulation loop formed by the cold source 170 and the second heat exchange tube of the condensing heat exchanger 110, the cold source 170 can flow the low-temperature working medium into the second heat exchange tube of the condensing heat exchanger 110, so that the temperature of the working medium in the second heat exchange tube of the condensing heat exchanger 110 is lower than the temperature of the working medium in the first heat exchange tube.

In one embodiment, the gaseous working medium enters the first heat exchange tube of the condensing heat exchanger 110, and the working medium in the first heat exchange tube of the condensing heat exchanger 110 exchanges heat with the working medium in the second heat exchange tube, and the heat of the gaseous working medium in the first heat exchange tube is transferred to the working medium in the second heat exchange tube. After the gaseous working medium in the first heat exchange tube releases heat, it condenses into a liquid working medium. At this time, the condensing heat exchanger 110 condenses the working medium in the first heat exchange tube into a liquid working medium, which can reduce the temperature of the working medium in the first heat exchange tube.

The evaporative heat exchanger 130 refers to a device that evaporates a liquid working medium into a gaseous working medium and transfers heat. In the embodiment of the present application, two heat exchange tubes are arranged inside the evaporative heat exchanger 130. One end of a heat exchange tube of the evaporative heat exchanger 130 (hereinafter referred to as the "third heat exchange tube") is connected to the switch valve 120 through a pipeline, and the other end is connected to the input end of the adsorption bed 140 and the input end of the compressor 150 through a pipeline. Both ends of another heat exchange tube of the evaporative heat exchanger 130 (hereinafter referred to as the "fourth heat exchange tube") are connected to the heating component through a pipeline. In the circulation loop formed by the fourth heat exchange tube of the evaporative heat exchanger 130 and the heating component, the heating component can flow the high-temperature working medium into the fourth heat exchange tube of the evaporative heat exchanger 130, so that the temperature of the working medium in the third heat exchange tube of the evaporative heat exchanger 130 is lower than the temperature of the working medium in the fourth heat exchange tube. Among them, the heat-generating components can dissipate heat for automobile engines, motors of new energy vehicles, battery modules, printed circuit boards (PCB), integrated circuit boards and other heat-generating devices.

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

The switch valve 120 is connected between the first heat exchange tube of the condensing heat exchanger 110 and the third heat exchange tube of the evaporating heat exchanger 130 through a pipeline. When the switch valve 120 is in the on state, the working fluid of the first heat exchange tube of the condensing heat exchanger 110 flows into the third heat exchange tube of the evaporating heat exchanger 130. When the switch valve 120 is in the off state, the working fluid of the first heat exchange tube of the condensing heat exchanger 110 cannot flow into the third heat exchange tube of the evaporating heat exchanger 130. In other embodiments, the switch valve 120 selects an electronic expansion valve (EEV), a throttle valve (TV) or other types of switch valves, which are not limited in the present application.

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

In one embodiment, the opening 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 tube of the evaporative heat exchanger 130, the pressure instantly decreases, and all or most of the liquid working medium will be vaporized into gaseous working medium. When a large amount of working medium is vaporized, it will absorb a large amount of heat, causing the temperature of the liquid working medium or the surrounding environment to drop significantly. At this time, the switch valve 120 has a more obvious effect in reducing the temperature of the working medium.

In one embodiment, the opening degree of the switch valve 120 is relatively large, and the liquid working medium enters between the switch valve 120 and the third heat exchange tube of the evaporative heat exchanger 130. After the pipeline between the two ends is opened, the pressure change is relatively small, and a small amount or no liquid working fluid will be vaporized into a gaseous working fluid. When a small amount of working fluid is vaporized, it will absorb a small amount of heat, so that the temperature of the liquid working fluid or the surrounding environment is reduced relatively little. At this time, the switch valve 120 has a relatively weak effect on reducing the temperature of the working fluid.

The refrigeration system 100 can adjust the opening of the switch valve 120 to control the ratio of the gaseous working medium to the liquid working medium entering the third heat exchange tube of the evaporative heat exchanger 130. The higher the ratio of the gaseous working medium, the lower the temperature of the working medium flowing into the third heat exchange tube of the evaporative heat exchanger 130 through the switch valve 120, which can increase the speed of heat exchange between the third heat exchange tube and the fourth heat exchange tube of the evaporative heat exchanger 130. The higher the ratio of the liquid working medium, the more heat the liquid working medium can absorb when vaporizing, which can increase the heat absorbed by the working medium in the third heat exchange tube of the evaporative heat exchanger 130 from the fourth heat exchange tube.

In the embodiment of the present application, the refrigeration system 100 can adjust the opening of the switch valve 120 to make the working medium in the pipeline between the third heat exchange tube of the evaporative heat exchanger 130 and the switch valve 120 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 tube of the evaporative heat exchanger 130.

In the embodiment of the present application, the refrigeration system 100 can adjust the opening of the switch valve 120 to control the pressure on both sides of the switch valve 120. In one embodiment, when the opening of the switch valve 120 is relatively small, the pressure of the circulation loop between the adsorption bed 140, the condensing heat exchanger 110 and the switch valve 120 is relatively high. The pressure of the circulation loop between the switch valve 120, the evaporative heat exchanger 130 and the adsorption bed 140 is relatively low. In one embodiment, when the opening of the switch valve 120 is relatively small, the pressure of the circulation loop between the compressor 150, the condensing heat exchanger 110 and the switch valve 120 is relatively high. The pressure of the circulation loop between the switch valve 120, the evaporative heat exchanger 130 and the compressor 150 is relatively low.

The adsorption bed 140 is also called a moving bed adsorber, which refers to a device in which the adsorbent follows the flow of the airflow to complete the adsorption during the adsorption process. During the adsorption process of the adsorption bed 140, the adsorbent absorbs the gaseous working medium inside the adsorption bed 140, allowing the adsorption bed 140 to release heat. During the desorption process of the adsorption bed 140, when the adsorbent reaches the desorption temperature, the adsorbent releases the gaseous working medium, allowing the adsorption bed 140 to absorb heat.

As shown in FIG2 , the adsorption bed 140 includes a cavity structure 141, an interface 142-1, an interface 142-2, an interface 143-1, an interface 143-2, an interface 144-1, an interface 144-2 and an adsorbent. The interface 142-1 and the interface 142-2 are arranged on the shell of the cavity structure 141 and are located on both sides of the cavity structure 141. The interface 142-1 is used as an input end and is connected to the third heat exchange tube of the evaporating heat exchanger 130 through a pipeline. The interface 142-2 is used as an output end and is connected to the first heat exchange tube of the condensing heat exchanger 110 through a pipeline. The interface 143-1 and the interface 143-2 are arranged on the shell of the cavity structure 141 and are located on both sides of the cavity structure 141. The interface 143-1 and the interface 143-2 are respectively connected to the heat source 160 through pipelines. The interface 144-1 and the interface 144-2 are arranged on the shell of the cavity structure 141 and are located at both sides of the cavity structure 141. The interface 144-1 and the interface 144-2 are respectively connected to the cold source 170 through pipelines. The adsorbent is arranged inside the cavity structure 141.

In one embodiment, the working fluid of the heat source 160 flows into the cavity structure 141 of the adsorption bed 140, and the heat of the working fluid of the heat source 160 is exchanged with the adsorbent, allowing the adsorbent to absorb the heat. When the temperature of the adsorbent reaches the desorption temperature, the adsorbent releases the gaseous working fluid, allowing the adsorption bed 140 to absorb heat. During the desorption process of the adsorbent, the internal pressure of the adsorption bed 140 increases. When the pressure inside the adsorption bed 140 is greater than the pressure of the first heat exchange tube of the condensing heat exchanger 110, the gaseous working fluid in the cavity structure 141 of the adsorption bed 140 enters the first heat exchange tube of the condensing heat exchanger 110.

In one embodiment, the working fluid of the cold source 170 flows into the cavity structure 140 of the adsorption bed 140, and the heat of the working fluid of the cold source 170 is exchanged with the adsorbent, so that the temperature of the adsorbent is reduced. After the temperature of the adsorbent is reduced, it will absorb the gaseous working fluid inside the adsorption bed 140. After the adsorbent absorbs the gaseous working fluid, it will release heat, allowing the working fluid of the cold source 170 to take away the heat generated inside the adsorption bed 140. During the adsorption process of the adsorbent, the internal pressure of the adsorption bed 140 is reduced. When the pressure inside the adsorption bed 140 is less than the pressure of the third heat exchange tube of the evaporative heat exchanger 130, the gaseous working fluid or two-phase state inside the third heat exchange tube of the evaporative heat exchanger 130 enters the cavity structure 140 of the adsorption bed 140.

In the embodiment of the present application, the adsorption bed 140 absorbs heat by using the cold source 170 to allow the adsorbent to perform adsorption, thereby achieving the absorption of the gaseous working medium or two-phase state inside the third heat exchange tube of the evaporative heat exchanger 130. The adsorption bed 140 releases heat by using the heat source 160 to allow the adsorbent to perform desorption, thereby achieving the entry of the gaseous working medium inside the adsorption bed 140 into the first heat exchange tube of the condensing heat exchanger 110. The adsorption bed 140 allows the working medium inside the circulation loop of the refrigeration system 100 to circulate. In other embodiments, the structure of the adsorption bed 140 is not limited to the structure shown in FIG. 2, but may also be other types of structures, which are not limited in the present application. The number of adsorption beds 140 may not be limited to the number shown in FIG. 1, but may be two or other numbers, which are not limited in the present application. In the embodiment of the present application, when the working medium of the refrigeration system 100 is water, the adsorbent inside the adsorption bed 140 may be zeolite, silica gel or other types of adsorbents.

The refrigeration system 100 further includes a stop valve 190. The stop valve 190 is connected between the interface 142-2 of the adsorption bed 140 and the first heat exchange tube of the condensing heat exchanger 110 through a pipeline. When the stop valve 190 is in the on state, the gaseous working medium inside the cavity structure 141 of the adsorption bed 140 can flow into the first heat exchange tube of the condensing heat exchanger 110. When the stop valve 190 is in the off state, the gaseous working medium inside the cavity structure 141 of the adsorption bed 140 cannot flow into the first heat exchange tube of the condensing heat exchanger 110.

In one embodiment, when the temperature of the heat source 160 is relatively low, the adsorption bed 140 cannot vaporize the liquid working medium in the third heat exchange tube of the evaporating heat exchanger 130 into a gaseous working medium. The refrigeration system 100 can keep the stop valve 190 in a closed state to prevent the liquid working medium from flowing into the first heat exchange tube of the condensing heat exchanger 110.

In one embodiment, when the working fluid of the cold source 170 flows into the cavity structure 140 of the adsorption bed 140, the refrigeration system 100 can keep the stop valve 190 in a closed state to prevent the adsorption bed 140 from reversely sucking the gaseous working fluid inside the first heat exchange tube of the condensing heat exchanger 110.

In the embodiment of the present application, the refrigeration system 100 can adjust the opening of the stop valve 190 so that the stop valve 190 and the switch valve 120 can control the pressure of the circulation loop of the refrigeration system 100. In one embodiment, the refrigeration system 100 can adjust the switch valve 120 and the stop valve 190 so that the pressure of the circulation loop between the stop valve 190, the condensing heat exchanger 110 and the switch valve 120 is relatively high, and the pressure of the circulation loop between the switch valve 120, the evaporating heat exchanger 130 and the adsorption bed 140 is relatively low.

The output end of the compressor 150 is connected to the first heat exchange tube of the condensing heat exchanger 110 through a pipeline, and the input end of the compressor 150 is connected to the third heat exchange tube of the evaporating heat exchanger 130 through a pipeline. In the embodiment of the present application, after the liquid working medium or the two-phase working medium flows into the compressor 150, the liquid working medium or the two-phase working medium is negatively compressed to obtain a gaseous working medium. The compressor 150 allows the gaseous working medium to flow into the first heat exchange tube of the condensing heat exchanger 110.

In the embodiment of the present application, the compressor 150 is a negative pressure compressor. During the operation of the negative pressure compressor, the volume of the suction chamber gradually increases, forming 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 a gaseous working medium under the action of the negative pressure. The suction chamber gradually compresses its volume, allowing the gaseous working medium to flow into the first heat exchange tube of the condensing heat exchanger 110.

The refrigeration system 100 further includes an exhaust valve 180. The exhaust valve 180 is connected between the compressor 150 and the first heat exchange tube of the condensing heat exchanger 110 through a pipeline. When the exhaust valve 180 is in the closed state, the gaseous working medium in the pipeline between the compressor 150 and the first heat exchange tube of the condensing heat exchanger 110 cannot be discharged to the outside. When the exhaust valve 180 is in the conducting state, the gaseous working medium in the pipeline between the compressor 150 and the first heat exchange tube of the condensing heat exchanger 110 can be discharged to the outside.

In one embodiment, when the compressor 150 outputs the gaseous working medium to the first heat exchange tube of the condensing heat exchanger 110, the pressure of the pipeline between the compressor 150 and the first heat exchange tube of the condensing heat exchanger 110 may be relatively high. When the pressure of the pipeline between the compressor 150 and the first heat exchange tube of the condensing heat exchanger 110 is greater than the set threshold, the exhaust valve 180 is in the conducting state, allowing the gaseous working medium inside the pipeline between the compressor 150 and the first heat exchange tube of the condensing heat exchanger 110 to be discharged to the outside, thereby reducing the pressure of the pipeline between the compressor 150 and the first heat exchange tube of the condensing heat exchanger 110.

The heat source 160 refers to a device that generates heat, such as an automobile engine, a motor of a new energy automobile, a battery module, a printed circuit board (PCB), an integrated circuit board, and other devices. In the embodiment of the present application, both ends of the heat source 160 are connected to the interface 143-1 and the interface 143-2 of the adsorption bed 140 through a pipeline. In the circulation loop of the heat source 160 and the cavity structure 141 of the adsorption bed 140, the heat of the heat source 160 can be transferred to the adsorption bed 140 through the working fluid, so that the adsorbent inside the adsorption bed 140 absorbs heat during the desorption process.

The cold source 170 refers to a device for reducing heat, such as a cooling fan, a radiator, a cooling tower, a dry cooler, etc. In the embodiment of the present application, both ends of the cold source 170 can be connected to the second heat exchange tube of the condensing heat exchanger 110 through a pipeline. In the circulation loop of the cold source 170 and the second heat exchange tube of the condensing heat exchanger 110, the heat of the second heat exchange tube of the condensing heat exchanger 110 can be transferred to the cold source 170 through the working medium, thereby reducing the temperature of the condensing heat exchanger 110.

The two ends of the cold source 170 can be connected to the interface 144-1 and the interface 144-2 of the adsorption bed 140 through pipelines. In the circulation loop of the cold source 170 and the cavity structure 141 of the adsorption bed 140, the low-temperature working fluid of the cold source 170 is input into the adsorption bed 140, which can absorb the heat released during the adsorption process of the adsorbent inside the adsorption bed 140.

In the embodiment of the present application, the first heat exchange tube of the condensing heat exchanger 110, the switch valve 120, the third heat exchange tube of the evaporating heat exchanger 130 and the adsorption bed 140 are connected in sequence through pipelines to form a closed loop. The heat source 160 is connected to the cavity structure 141 of the adsorption bed 140 through a pipeline. The cold source 170 is connected to the cavity structure 141 of the adsorption bed 140 through a pipeline. The cold source 170 is connected to the second heat exchange tube of the condensing heat exchanger 110 through a pipeline. The fourth heat exchange tube of the evaporating heat exchanger 130 is connected to the heat-generating component through a pipeline. When the temperature of the heat source 160 is relatively high and the temperature of the cold source 170 is relatively low, the refrigeration system 100 cools the heat-generating component through the circulation loop of "adsorption bed 140→first heat exchange tube of condensing heat exchanger 110→switch valve 120→third heat exchange tube of evaporating heat exchanger 130".

Among them, the relatively high temperature of the heat source 160 means that the temperature of the heat source 160 is greater than the desorption temperature of the adsorbent inside the adsorption bed 140. On the contrary, the relatively low temperature of the heat source 160 means that the temperature of the heat source 160 is not greater than the desorption temperature of the adsorbent inside the adsorption bed 140. Similarly, the relatively low temperature of the cold source 170 means that the temperature of the cold source 170 is lower than the temperature of the working medium of the second heat exchange tube of the condensing heat exchanger 110. On the contrary, the relatively high temperature of the cold source 170 means that the temperature of the cold source 170 is not lower than the temperature of the working medium of the second heat exchange tube of the condensing heat exchanger 110.

In the embodiment of the present application, the first heat exchange tube of the condensing heat exchanger 110, the switch valve 120, the third heat exchange tube of the evaporating heat exchanger 130 and the compressor 150 are connected in sequence through pipelines to form a closed loop. The cold source 170 is connected to the second heat exchange tube of the condensing heat exchanger 110 through a pipeline. The fourth heat exchange tube of the evaporating heat exchanger 130 is connected to the heat-generating component through a pipeline. When the temperature of the heat source 160 is relatively low and the temperature of the cold source 170 is relatively high, the refrigeration system 100 cools the heat-generating component through the circulation loop of "compressor 150→first heat exchange tube of the condensing heat exchanger 110→switch valve 120→third heat exchange tube of the evaporating heat exchanger 130", so that the refrigeration system 100 can cool the heat-generating component uninterruptedly.

In the embodiment of the present application, the refrigeration system 100 can allow the circulation loop of "adsorption bed 140 → first heat exchange tube of condensing heat exchanger 110 → switch valve 120 → third heat exchange tube of evaporating heat exchanger 130" and the circulation loop of "compressor 150 → first heat exchange tube of condensing heat exchanger 110 → switch valve 120 → third heat exchange tube of evaporating heat exchanger 130" to circulate at the same time, which can improve the refrigeration effect of the refrigeration system 100 and reduce the energy consumption of the refrigeration system 100.

As shown in FIG3 , the temperature of the heat source 160 is greater than the desorption temperature of the adsorbent inside the adsorption bed 140. The high temperature working fluid of the heat source 160 flows into the adsorption bed 140. In the cavity structure 141 of the bed 140, the heat of the working fluid of the heat source 160 is exchanged with the adsorbent, allowing the adsorbent to absorb heat. When the temperature of the adsorbent reaches the desorption temperature, the adsorbent releases the gaseous working fluid, allowing the adsorption bed 140 to absorb heat. During the adsorbent desorption process, the internal pressure of the adsorption bed 140 increases. When the pressure inside the adsorption bed 140 is greater than the pressure of the first heat exchange tube of the condensing heat exchanger 110, the gaseous working fluid in the cavity structure 140 of the adsorption bed 140 enters the first heat exchange tube of the condensing heat exchanger 110. After the adsorbent desorption is completed, the refrigeration system 100 cuts off the working fluid of the heat source 160 from flowing into the adsorption bed 140.

In the circulation loop of the cold source 170 and the second heat exchange tube of the condensing heat exchanger 110, the low-temperature working medium of the cold source 170 flows into the second heat exchange tube of the condensing heat exchanger 110. The gaseous working medium of the first heat exchange tube of the condensing heat exchanger 110 exchanges heat with the low-temperature working medium of the second heat exchange tube. The gaseous working medium of the first heat exchange tube of the condensing heat exchanger 110 condenses into a liquid working medium. The liquid working medium of the first heat exchange tube of the condensing heat exchanger 110 flows into the switch valve 120.

The refrigeration system 100 adjusts the opening of the switch valve 120 so that the switch valve 120 converts the liquid working medium into a two-phase working medium. The two-phase working medium flows into the third heat exchange tube of the evaporative heat exchanger 130. The two-phase working medium of the third heat exchange tube of the evaporative heat exchanger 130 exchanges heat with the working medium of the fourth heat exchange tube. The liquid working medium of the third heat exchange tube of the evaporative heat exchanger 130 evaporates into a gaseous working medium.

In the circulation loop between the fourth heat exchange tube of the evaporative heat exchanger 130 and the heat generating component, the working fluid after being cooled in the fourth heat exchange tube of the evaporative heat exchanger 130 flows into the heat generating component, which can reduce the temperature of the heat generating component.

As shown in FIG4 , after the refrigeration system 100 cuts off the working fluid of the heat source 160 from flowing into the adsorption bed 140, the working fluid of the cold source 170 flows into the cavity structure 140 of the adsorption bed 140. The heat of the working fluid of the cold source 170 is exchanged with the adsorbent, so that the temperature of the adsorbent is reduced. After the temperature of the adsorbent is reduced, it absorbs the gaseous working fluid inside the adsorption bed 140. After the adsorbent absorbs the gaseous working fluid, it releases heat, allowing the working fluid of the cold source 170 to take away the heat generated inside the adsorption bed 140.

During the adsorption process of the adsorbent, the pressure inside the adsorption bed 140 decreases. When the pressure inside the adsorption bed 140 is lower than the pressure of the third heat exchange tube of the evaporative heat exchanger 130, the gaseous working medium or two-phase state inside the third heat exchange tube of the evaporative heat exchanger 130 enters the cavity structure 140 of the adsorption bed 140.

As shown in FIG5 , when the temperature of the heat source 160 is not greater than the desorption temperature of the adsorbent of the adsorption bed 140, the adsorption bed 140 cannot vaporize the liquid working medium inside the third heat exchange tube of the evaporative heat exchanger 130 into a gaseous working medium. The refrigeration system 100 can keep the stop valve 190 in a closed state, stop the circulation loop of "adsorption bed 140→first heat exchange tube of condensing heat exchanger 110→on-off valve 120→third heat exchange tube of evaporative heat exchanger 130", and let the compressor 150 work. The refrigeration system 100 can keep the circulation loop of "compressor 150→first heat exchange tube of condensing heat exchanger 110→on-off valve 120→third heat exchange tube of evaporative heat exchanger 130" flowing.

After the compressor 150 sucks the liquid working medium or the two-phase working medium of the first heat exchange tube of the condensing heat exchanger 110 , it compresses the liquid working medium or the two-phase working medium under negative pressure to obtain a gaseous working medium. The compressor 150 allows the gaseous working medium to flow into the first heat exchange tube of the condensing heat exchanger 110 .

The refrigeration system 100 adjusts the opening of the switch valve 120 so that the switch valve 120 converts the liquid working medium into a two-phase working medium. The two-phase working medium flows into the third heat exchange tube of the evaporating heat exchanger 130. The two-phase working medium of the third heat exchange tube of the evaporating heat exchanger 130 exchanges heat with the working medium of the fourth heat exchange tube. The liquid working medium of the third heat exchange tube of the evaporating heat exchanger 130 evaporates into a gaseous working medium. The liquid working medium or the two-phase working medium of the third heat exchange tube of the evaporating heat exchanger 130 is sucked into the compressor 150 again.

In the circulation loop between the fourth heat exchange tube of the evaporative heat exchanger 130 and the heat generating component, the working fluid after cooling in the fourth heat exchange tube of the evaporative heat exchanger 130 flows into the heat generating component, which can reduce the temperature of the heat generating component. When the temperature of the heat source 160 is insufficient, the refrigeration system 100 allows the compressor 150 to work, so that the refrigeration system 100 can continuously cool the heat generating component.

In the embodiment of the present application, water is used as the working fluid in each circulation loop in the refrigeration system 100, 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 fluid, 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 neutrality. Both circulation loops of the refrigeration system 100 use water as the working fluid, which increases the energy consumption ratio (coefficient of performance, COP) of the refrigeration system 100 by more than 16% compared with the COP of the traditional refrigeration system using chilled water as the working fluid.

The embodiment of the present application provides an electric power device, which includes a heat-generating component and a refrigeration system 100 as shown in Figures 1 to 5 and the corresponding protection scheme described above. A working fluid circulation loop may be provided inside the heat-generating component, and the working fluid circulation loop of the heat-generating component is connected to the fourth heat exchange pipe of the evaporative heat exchanger 130 of the refrigeration system 100 to form a circulation loop. The working fluid 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.

Among them, power equipment can be understood as electric vehicles, base stations, outdoor cabinets, etc. Heat-generating components can be engines, motors, battery modules, PCBs, integrated circuit boards, etc. Power equipment can be broadly understood as data centers, offices, workshops, etc. Heat-generating components can be Since the electric equipment includes a refrigeration system, the electric equipment has all or part of the advantages of the refrigeration system.

The types, quantities, shapes, connection methods, 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 all technical solutions implemented under the principles of the present application are within the protection scope of the present solution. Any one or more embodiments or illustrations in the specification, combined in an appropriate manner, are within the protection scope of the present solution.

The types, quantities, shapes, installation methods, structures, etc. of the components of the power equipment provided in the embodiments of the present application are not limited to the above embodiments. All technical solutions implemented under the principles of the present application are within the protection scope of this solution. Any one or more embodiments or diagrams in the specification, combined with technical solutions in a suitable manner, are within the protection scope of this solution. Among them, the electronic equipment can be a power module, a new energy vehicle, an outdoor base station, an outdoor cabinet or other equipment, which is not limited in this application.

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 is described in detail with reference to the aforementioned embodiments, the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims

A refrigeration system, characterized in that it comprises: a condensing heat exchanger, a switch valve, an evaporating heat exchanger, an adsorption bed and a compressor, wherein the condensing heat exchanger, the switch valve and the evaporating heat exchanger are connected in sequence through pipelines.

The condensing heat exchanger is connected to the output end of the adsorption bed and the output end of the compressor through pipelines, and is used to condense the gaseous working medium output from the adsorption bed and/or the compressor into a liquid working medium;

The evaporative heat exchanger is connected to the input end of the adsorption bed and the input end of the compressor through pipelines, and is used to evaporate the liquid working medium into a gaseous working medium, input it into the adsorption bed and/or the compressor, and reduce the temperature of the heat-generating components.
The refrigeration system according to claim 1, characterized in that the refrigeration system further comprises a heat source and a cold source,

The adsorption bed is connected to the heat source and the cold source respectively through pipelines, and is used to output gaseous working medium to the condensing heat exchanger after the high-temperature working medium flows into the heat source; or

After the low-temperature working medium flows into the cold source, the liquid working medium or the two-phase working medium of the evaporative heat exchanger is sucked into the cold source.
The refrigeration system according to claim 2 is characterized in that the temperature of the working fluid input by the heat source is greater than the desorption temperature of the adsorbent inside the adsorption bed, and the desorption temperature is the temperature at which the adsorbent releases the gaseous working fluid.
The refrigeration system according to any one of claims 2 or 3, characterized in that the condensing heat exchanger comprises a first heat exchange tube and a second heat exchange tube,

One end of the first heat exchange tube is connected to the switch valve through a pipeline, and the other end of the first heat exchange tube is connected to the output end of the adsorption bed and the output end of the compressor through a pipeline; both ends of the second heat exchange tube are connected to the cold source through pipelines.
The refrigeration system according to any one of claims 2 to 4, characterized in that the evaporative heat exchanger comprises a third heat exchange tube and a fourth heat exchange tube,

One end of the third heat exchange tube is connected to the switch valve through a pipeline, and the other end of the third heat exchange tube is connected to the input end of the adsorption bed and the input end of the compressor through a pipeline; both ends of the second heat exchange tube are connected to the heat-generating component through pipelines.
The refrigeration system according to any one of claims 1 to 5, characterized in that the refrigeration system further comprises an exhaust valve,

The exhaust valve is arranged on the pipeline between the condensing heat exchanger and the output end of the compressor, and is used to discharge the gaseous working medium when the pressure of the pipeline between the condensing heat exchanger and the output end of the compressor is greater than a set threshold.
The refrigeration system according to any one of claims 1 to 6, characterized in that the refrigeration system further comprises a stop valve,

The stop valve is arranged on the pipeline between the condensing heat exchanger and the output end of the adsorption bed, and is used to control the gaseous working medium from the adsorption bed to the condensing heat exchanger.
The refrigeration system according to any one of claims 1 to 7, characterized in that the working fluid of the refrigeration system is water.
The refrigeration system according to any one of claims 2 to 8, characterized in that the adsorbent inside the adsorption bed is zeolite or silica gel.
The refrigeration system according to any one of claims 1 to 9, characterized in that the compressor is a negative pressure compressor.
An electric power device, characterized by comprising:

at least one heat generating component,

At least one refrigeration system according to any one of claims 1 to 10, wherein the evaporative heat exchanger of the at least one refrigeration system is respectively connected to the at least one heat-generating component through pipelines.