CN115915705B - A refrigeration system and electrical equipment - Google Patents
A refrigeration system and electrical equipmentInfo
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- CN115915705B CN115915705B CN202211284863.7A CN202211284863A CN115915705B CN 115915705 B CN115915705 B CN 115915705B CN 202211284863 A CN202211284863 A CN 202211284863A CN 115915705 B CN115915705 B CN 115915705B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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Abstract
一种制冷系统，包括：冷凝换热器、第一开关阀、蒸发换热器、吸收式制冷模组和压缩机。冷凝换热器、开关阀和蒸发换热器依次通过管路连接。吸收式制冷模组和压缩机均连接在冷凝换热器与蒸发换热器之间。在吸收式制冷模组、冷凝换热器、开关阀和蒸发换热器的循环环路中，吸收式制冷模组无法产生气态工质时，可以让压缩机工作。制冷系统可以通过压缩机、冷凝换热器、开关阀和蒸发换热器的循环环路实现工质循环，让蒸发换热器可以不间断地降低发热部件的温度。
A refrigeration system includes: a condensing heat exchanger, a first switching valve, an evaporating heat exchanger, an absorption refrigeration module, and a compressor. The condensing heat exchanger, the switching valve, and the evaporating heat exchanger are connected sequentially via piping. 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, condensing heat exchanger, switching valve, and evaporating heat exchanger, the compressor can operate when the absorption refrigeration module cannot generate gaseous working fluid. The refrigeration system can achieve working fluid circulation through the circulation loop of the compressor, condensing heat exchanger, switching valve, and evaporating heat exchanger, allowing the evaporating heat exchanger to continuously reduce the temperature of the heat-generating components.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigeration system and power equipment.
Background
In the existing power equipment such as automobiles, outdoor base stations, data centers and the like, heating components such as an engine, a motor, a battery module, an integrated circuit board and the like are generally arranged. As the power equipment operates for a long time, heat generating components inside the power equipment generate a large amount of heat. If the heat of the heating component in the power equipment is timely transferred out, the normal work of the heating component can be affected, and even potential safety hazards exist. Therefore, how to reduce the temperature of the heat generating components inside the power equipment is a problem that needs to be solved at present.
Disclosure of Invention
In order to solve the above problems, in an embodiment of the present application, a refrigeration system and an electric power device are provided, where an absorption refrigeration module, a condensation heat exchanger, a switching valve and an evaporation heat exchanger are sequentially connected through a pipeline to form a closed loop. The compressor, the condensing heat exchanger, the switching valve and the evaporating heat exchanger are communicated through pipelines in sequence to form a closed loop. When the absorption refrigeration module works normally, the evaporation heat exchanger of the refrigeration system is used for refrigerating by the heating component through a circulation loop of the absorption refrigeration module, the condensation heat exchanger, the switching valve and the evaporation heat exchanger. When the absorption refrigeration module cannot work normally, the compressor is enabled to work. The evaporating heat exchanger of the refrigerating system is used for refrigerating the heating component through a circulating loop of a compressor, a condensing heat exchanger, a switching valve and an evaporating heat exchanger, so that the refrigerating system can be used for continuously refrigerating the heating component.
For this purpose, the following technical scheme is adopted in the embodiment of the application:
The application provides a refrigerating system which comprises a condensing heat exchanger, a first switch valve, an evaporating heat exchanger, an absorption refrigerating 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 respectively connected to the output end of the absorption refrigerating module and the output end of the compressor through pipelines and used for condensing a gas working medium output by the absorption refrigerating module and/or the compressor into a liquid working medium, and the evaporating heat exchanger is respectively connected to the input end of the absorption refrigerating module and the input end of the compressor through pipelines and used for evaporating the liquid working medium into a gaseous working medium and inputting the gaseous working medium into the absorption refrigerating module and/or the compressor and reducing the temperature of a heating component.
In this embodiment, the condensing heat exchanger, the switching valve and the evaporating heat exchanger are connected in sequence by a pipeline. 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 condensation heat exchanger, the switch valve and the evaporation heat exchanger, the compressor can work when the absorption refrigeration module cannot generate gaseous working medium. The refrigerating system can realize working medium circulation through the circulation loop of the compressor, the condensing heat exchanger, the switching valve and the evaporating heat exchanger, so that the evaporating heat exchanger can continuously reduce the temperature of the heating component.
In one embodiment, 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 first switch valve through a pipeline, the other end of the first heat exchange tube 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 tube are connected to a cold source through pipelines.
In one embodiment, the evaporation 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 first switch valve through a pipeline, the other end of the third heat exchange tube 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 second heat exchange tube are connected to the heating component through pipelines.
In one embodiment, the absorption refrigeration module comprises an absorber and a generator, wherein the input end of the absorber is connected to the output ends of the evaporation converter and the generator respectively through pipelines and is used for enabling a solution with a first concentration input by the generator to absorb gaseous working media of the evaporation converter, the output end of the generator is connected to the condensation converter 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 a solution with a second concentration input by the absorber and outputting the generated gaseous working media to the condensation converter, and the adsorbent content of the solution with the first concentration is higher than that of the solution with the second concentration.
In this embodiment, the absorber and the generator are connected to each other by a pipe, and form a circulation loop. The high-concentration adsorbent solution in the absorber absorbs the gaseous working medium of the evaporation converter to form the low-concentration adsorbent solution. The generator heats the low concentration adsorbent solution to produce a gaseous working medium and form a high concentration adsorbent solution. Gaseous working medium generated by the generator is input into the condensation converter to realize working medium circulation of a circulation loop of the refrigerating system.
In one embodiment, the absorption refrigeration module further comprises an intermediate heat exchanger, wherein the intermediate heat exchanger is arranged on a pipeline between the absorber and the generator and is used for transferring heat of the first concentration solution output by the generator into the second concentration solution output by the absorber.
In this embodiment, the intermediate converter exchanges heat between the heated high-concentration adsorbent solution output from the generator and the low-concentration adsorbent solution flowing into the generator, so that heat flowing out of the generator flows back into the generator, and heat loss of the generator is reduced.
In one embodiment, the intermediate heat exchanger comprises a fifth heat exchange tube and a sixth heat exchange tube, wherein one end of the fifth heat exchange tube is connected to the output end of the absorber through a pipeline, the other end of the fifth heat exchange tube is connected to the input end of the generator through a pipeline, one end of the sixth heat exchange tube is connected to the input end of the absorber through a pipeline, and the other end of the sixth heat exchange tube is connected to the output end of the generator through a pipeline.
In one embodiment, the absorption refrigeration module further comprises a pump disposed on a line between the output of the absorber and the fifth heat exchange tube of the intermediate heat exchanger for pumping the second concentration solution inside the absorber into the generator.
In this embodiment, a pump is provided in the line between the absorber and the generator. The pump provides power for the solution of the circulation loop of the absorption refrigeration module, so that the solution circulates in the circulation loop of the absorption refrigeration module.
In one embodiment, the absorption refrigeration module further comprises a second switch valve, wherein the second switch valve is arranged on a pipeline between the sixth heat exchange pipe of the intermediate heat exchanger and the input end of the absorber and is used for converting the first concentration solution in the generator into the sprayed first concentration solution.
In this embodiment, an on-off valve is provided in the line between the absorber and the generator. The opening degree of the switching valve can be adjusted by the refrigerating system, so that the liquid high-concentration absorbent solution forms spray high-concentration absorbent solution and flows into the absorber. The sprayed high-concentration absorbent solution can better absorb gaseous working media.
In one embodiment, the refrigerant inside the absorption refrigeration module is a working medium of the refrigeration system.
In the embodiment, the working medium of the refrigeration system is the same as the refrigerant in the absorption refrigeration module, so that the complexity of the solution in the absorption refrigeration module can be reduced, and the cost of the refrigeration system is reduced.
In one embodiment, the boiling point of the refrigerant inside the absorption refrigeration module is less than the boiling point of the absorbent inside the absorption refrigeration module.
In the embodiment, the boiling point of the refrigerant in the absorption refrigeration module is smaller than that of the absorbent, so that the absorbent is prevented from volatilizing when the gaseous working medium is generated in the absorption refrigeration module, and the working medium of a circulation loop of the refrigeration system is prevented from being polluted.
In one embodiment, the refrigeration system further comprises an exhaust valve disposed on the line between the condensing heat exchanger and the output of the compressor for exhausting the gaseous working medium when the pressure of the line between the condensing heat exchanger and the output of the compressor is greater than a set threshold.
In this embodiment, an exhaust valve is arranged in the line between the condensing heat exchanger and the output 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, so that the damage of a circulating loop caused by the excessively high pressure in the circulating loop of the refrigerating system is avoided.
In one embodiment, the refrigerant system is water.
In the embodiment, the working medium in each circulation loop in the refrigeration system adopts water, so that the cost of the refrigeration system can be reduced, and the competitive advantage of the refrigeration system can be improved.
In one embodiment, the compressor is a negative pressure compressor.
In a second aspect, an embodiment of the present application provides an electrical device, including at least one heat generating component, at least one refrigeration system as each possible implementation of the first aspect, where an evaporation heat exchanger of the at least one refrigeration system is connected to the at least one heat generating component through a pipeline, respectively. The power equipment can be electric automobiles, base stations, outdoor cabinets and other equipment. The heating component can be an engine, a motor, a battery module, a PCB, an integrated circuit board and the like. The power devices may be data centers, offices, workshops, etc. The heat generating component may be a closed space.
Drawings
The drawings that accompany the detailed description can be briefly described as follows.
Fig. 1 is a schematic diagram of a refrigeration system according to an embodiment of the present application;
fig. 2 is a schematic diagram of a working medium circulation path of a refrigeration system when an absorption refrigeration module provided in an embodiment of the present application is working normally;
FIG. 3 is a schematic diagram of a solution circulation path inside an absorption refrigeration module according to an embodiment of the present application;
Fig. 4 is a schematic diagram of a refrigeration system in operation of a compressor according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.
In the description of the present application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixed, removable, or contradictory or integral, as will be understood by those of ordinary skill in the art in view of the specific meaning of the terms in this disclosure.
In the description of the present application, the term "and/or" is an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B, and that three cases of a alone, a and B together, and B alone may exist. The symbol "/" herein indicates that the associated object is or is a relationship, e.g., A/B indicates A or B.
In the description of the present application, the terms "first" and "second" and the like are used to distinguish between different objects and are not used to describe a particular order of objects. For example, the first response message and the second response message, etc. are used to distinguish between different response messages, and are not used to describe a particular order of response messages.
In embodiments of the application, the words "in one embodiment" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "in one embodiment" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "in one embodiment" or "such as" is intended to present related concepts in a concrete fashion.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
Fig. 1 is a schematic diagram of a refrigeration system according to an embodiment of the present application. As shown in fig. 1, the refrigeration system 100 includes a condensing heat exchanger 110, an on-off valve 120, an evaporating heat exchanger 130, an absorption refrigeration module 140, and a compressor 150. The condensing heat exchanger 110, the switching valve 120, and the evaporating heat exchanger 130 are sequentially connected through pipes. The absorption refrigeration module 140 is connected between the condensation heat exchanger 110 and the evaporation heat exchanger 130 through a pipeline to form a circulation loop of 'the absorption refrigeration module 140, the condensation heat exchanger 110, the switching valve 120 and the evaporation heat exchanger 130'. The compressor 150 is connected between the condensing heat exchanger 110 and the evaporating heat exchanger 130 through a pipeline, and forms a circulation loop of 'the compressor 150- & gt the condensing heat exchanger 110- & gt the switching valve 120- & gt the evaporating heat exchanger 130'. The working medium can flow in two circulation loops, and heat transfer among all the components is realized. Wherein, the pipeline can be divided into a gaseous pipeline and a liquid pipeline. The gaseous pipeline refers to a pipeline for circulating gaseous working medium. The liquid pipeline refers to a pipeline for circulating liquid working medium.
It should be noted that, in the embodiment of the present application, the working medium in the circulation loop of the refrigeration system 100 is water. In other embodiments, the working medium may be other liquids, such as ammonia (NH 3/H2 O), methylether (CH 3-O-CH3), tetrafluoroethane (CH 2FCF3), tetrafluoropropene (C 3H2F4), or a liquid formed by mixing a plurality of different components, which is not limited herein.
The condensing heat exchanger 110 refers to a device that condenses a gaseous working medium into a liquid working medium and converts heat. In the embodiment of the present application, two heat exchange tubes are disposed inside the condensation heat exchanger 110. One end of a heat exchange tube (hereinafter referred to as a "first heat exchange tube") of the condensing heat exchanger 110 is connected to the on-off valve 120 through a pipe, and the other end is connected to an output end of the absorption refrigeration module 140 and an output end of the compressor 150 through a pipe. Two ends of the other heat exchange tube (hereinafter referred to as a "second heat exchange tube") of the condensing heat exchanger 110 are connected to a cold source through a pipe. In the circulation loop formed by the cold source and the second heat exchange tube of the condensation heat exchanger 110, the cold source can flow the low-temperature working medium into the second heat exchange tube of the condensation heat exchanger 110, so that the temperature of the working medium of the second heat exchange tube of the condensation heat exchanger 110 is lower than that of the working medium of the first heat exchange tube.
In one embodiment, the gaseous working fluid enters the first heat exchange tube of the condensation heat exchanger 110, the working fluid of the first heat exchange tube of the condensation heat exchanger 110 exchanges heat with the working fluid of the second heat exchange tube, and heat of the gaseous working fluid of the first heat exchange tube is transferred to the working fluid of the second heat exchange tube. The gaseous working medium of the first heat exchange tube releases heat and is condensed into liquid working medium. At this time, the condensing heat exchanger 110 condenses the working medium of the first heat exchange tube into a liquid working medium, so that the temperature of the working medium of the first heat exchange tube can be reduced. 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.
The evaporating 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 disposed inside the evaporation heat exchanger 130. One end of a heat exchange tube (hereinafter referred to as a "third heat exchange tube") of the evaporation heat exchanger 130 is connected to the on-off valve 120 through a pipe, and the other end is connected to an input end of the absorption refrigeration module 140 and an input end of the compressor 150 through a pipe. The other heat exchange tube (hereinafter referred to as a "fourth heat exchange tube") of the evaporative heat exchanger 130 is connected at both ends to the heat generating component by piping. In the circulation loop formed by the fourth heat exchange tube of the evaporation 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 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. The heating component can radiate heat for heating devices such as an engine of an automobile, a motor of a new energy automobile, a battery module, a printed circuit board (printed circuit boards, PCB), an integrated circuit board and the like.
In one embodiment, the liquid working fluid or the two-phase working fluid flows into the third heat exchange tube of the evaporation heat exchanger 130, and the working fluid of the third heat exchange tube of the evaporation heat exchanger 130 exchanges heat with the working fluid of the fourth heat exchange tube, and heat of the working fluid of the fourth heat exchange tube is transferred to the working fluid of the third heat exchange tube. The liquid working medium of the third heat exchange tube absorbs heat and evaporates into gaseous working medium. At this time, the evaporating heat exchanger 130 evaporates the liquid working medium of the third heat exchange tube into the gaseous working medium, so that the temperature of the working medium of the fourth heat exchange tube can be reduced. The cooled working fluid of the fourth heat exchange tube of the evaporative heat exchanger 130 is circulated to the heat generating component, so that the temperature of the heat generating component can be reduced.
The switching 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 pipe. The switching valve 120 is in a conductive state, and 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. The switching valve 120 is in an off state, and 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 on-off valve 120 is an electronic expansion valve (electronic expansion valve, EEV), a Throttle Valve (TV), or other types of on-off valves, which are not limited in this disclosure.
In the embodiment of the present application, the working medium in the pipeline between the first heat exchange tube of the condensation heat exchanger 110 and the on-off valve 120 is in a liquid state. The refrigeration system 100 can adjust the temperature of the working fluid flowing into the third heat exchange tube of the evaporation heat exchanger 130 by controlling the opening degree of the on-off valve 120.
In one embodiment, the opening degree of the switch valve 120 is smaller, and after the liquid working medium enters the pipeline between the switch valve 120 and the third heat exchange tube of the evaporation heat exchanger 130, the pressure is instantaneously reduced, 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 can be absorbed, so that the temperature of the liquid working medium or the surrounding environment is reduced relatively much. At this time, the temperature effect of the switching valve 120 for reducing the working fluid is relatively remarkable.
In one embodiment, the opening degree of the switch valve 120 is relatively large, and after the liquid working medium enters the pipeline between the switch valve 120 and the third heat exchange tube of the evaporation heat exchanger 130, the pressure change is relatively small, and a small amount or no liquid working medium is vaporized into a gaseous working medium. When a small amount of working medium is vaporized, a small amount of heat can be absorbed, so that the temperature of the liquid working medium or the surrounding environment is reduced less. At this time, the temperature effect of the switching valve 120 to lower the working medium is weak.
The refrigeration system 100 can adjust the opening of the switch valve 120 to control the duty ratio of the gaseous working medium and the liquid working medium of the third heat exchange tube entering the evaporation heat exchanger 130. The higher the duty ratio of the gaseous working fluid, the lower the temperature of the working fluid flowing into the third heat exchange tube of the evaporation heat exchanger 130 by the switching valve 120, and the speed of heat exchange between the third heat exchange tube and the fourth heat exchange tube of the evaporation heat exchanger 130 can be increased. The higher the duty ratio of the liquid working medium is, the more heat can be absorbed when the liquid working medium is vaporized, and the heat absorption of the working medium of the third heat exchange tube of the evaporation heat exchanger 130 to the fourth heat exchange tube can be improved.
In the embodiment of the present application, the refrigerating system 100 may adjust the opening degree of the on-off valve 120 to make the working medium in the pipeline between the third heat exchange tube of the evaporating heat exchanger 130 and the on-off valve 120 be in a two-phase state. The ratio of the gaseous working medium to the liquid working medium in the two phases may be determined according to the temperature of the working medium of the fourth heat exchange tube of the evaporating heat exchanger 130.
In the embodiment of the present application, the refrigeration system 100 may adjust the opening degree of the on-off valve 120, and control the pressure at two sides of the on-off valve 120. In one embodiment, when the opening degree of the on-off valve 120 is relatively small, the pressure of the circulation loop between the absorption refrigeration module 140, the condensation heat exchanger 110 and the on-off valve 120 is relatively high. The pressure of the circulation loop between the on-off valve 120, the evaporation heat exchanger 130 and the absorption refrigeration module 140 is relatively low. In one embodiment, when the opening degree of the on-off valve 120 is relatively small, the pressure of the circulation loop between the compressor 150, the condensing heat exchanger 110 and the on-off valve 120 is relatively high. The pressure of the circulation loop between the on-off valve 120, the evaporation heat exchanger 130 and the compressor 150 is relatively low.
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 fig. 2, the absorption refrigeration module 140 includes an absorber 141, a pump 142, an intermediate heat exchanger 143, a generator 144, and an on-off valve 145. The output end of the absorber 141, the pump 142, the fifth heat exchange tube of the intermediate heat exchanger 143, and the input end of the generator 144 are sequentially connected by pipes to form a flow path. The output end of the generator 144, the sixth heat exchange tube of the intermediate heat exchanger 143, the on-off valve 145, and the input end of the absorber 141 are sequentially connected by pipes to form a flow path. The absorber 141, the generator 144, and the two flow paths constitute a circulation loop.
The absorption refrigeration module 140 has a refrigerant and an absorbent disposed in a circulation loop. The boiling point of the refrigerant is lower than the boiling point of the absorbent. The refrigerant may be dissolved in the absorbent, or the absorbent may be dissolved in the refrigerant. In the embodiment of the present application, the refrigerant is a working medium of the refrigeration system 100, and may be water. The absorbent may be lithium bromide or other high boiling point solutes. Wherein the boiling point of water is 100 ℃. The boiling point of lithium bromide is 1265 ℃.
The absorber 141 refers to a device that absorbs a refrigerant in a gaseous state through a high concentration absorbent solution. In the embodiment of the present application, the absorber 141 is connected to the third heat exchange tube of the evaporation heat exchanger 130 through a pipeline. The gaseous working medium or the two-phase working medium of the evaporation 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 absorbent solution, so that the gaseous working medium is converted into the liquid working medium.
The pump 142 provides power to the solution in the circulation loop of the absorption refrigeration module 140, and enables the solution to circulate in the circulation loop of the absorption refrigeration module 140. In an embodiment of the present application, pump 142 pumps a low concentration of absorbent solution inside absorber 141 into generator 144.
The generator 144 refers to a device that precipitates a refrigerant by heating. In the embodiment of the present application, the generator 144 is connected to the first heat exchange tube of the condensation heat exchanger 110 through a pipeline. The generator 144 is internally provided with a heater. The heater of generator 144 heats the incoming dilute absorbent solution to vaporize the refrigerant in the solution into a gaseous working medium. When the generator 144 generates the gaseous working medium, the pressure inside the generator 144 increases, so that the gaseous working medium flows into the first heat exchange tube of the condensation heat exchanger 110. The refrigerant of the low concentration absorbent solution inside the generator 144 is reduced to form a high concentration absorbent solution. 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 absorber 141 through the intermediate converter 143 and the on-off valve 145.
In one embodiment, the heater of the generator 144 may be a heat source such as an engine of an automobile, a motor of a new energy automobile, a battery module, a printed circuit board (printed circuit boards, PCB), an integrated circuit board, or the like. The heater of the generator 144 may be an electric heater or other device, and the application is not limited herein.
The intermediate converter 143 refers to a device that transfers heat. In the embodiment of the present application, two heat exchange tubes are disposed inside the intermediate converter 143. One end of a heat exchange tube (hereinafter referred to as a "fifth heat exchange tube") of the intermediate converter 143 is connected to the pump 142 through a pipe, and the other end is connected to an input end of the generator 144 through a pipe. One end of another heat exchange tube (hereinafter referred to as a "sixth heat exchange tube") of the intermediate converter 143 is connected to an output end of the generator 144 through a pipe, and the other end is connected to the on-off valve 145 through a pipe.
The solution of the fifth heat exchange tube of the intermediate converter 143 is the low concentration absorbent solution of the absorber 141. The solution of the sixth heat exchange tube of the intermediate converter 143 is the high-concentration absorbent solution of the generator 144. The intermediate converter 143 may exchange heat between the solution of the fifth heat exchange tube and the solution of the sixth heat exchange tube, and transfer heat of the high-concentration absorbent solution of the sixth heat exchange tube to the low-concentration absorbent solution of the fifth heat exchange tube, so that heat flowing out of the generator 144 flows back to the generator 144, and heat loss of the generator 144 is reduced.
The on-off valve 145 is in an on state, and the high concentration absorbent solution of the generator 144 flows into the absorber 141. The on-off valve 145 is in an off state, and the high concentration absorbent solution of the generator 144 cannot flow into the absorber 141. In other embodiments, the on-off valve 145 is selected from EEVs, TVs, or other types of on-off valves, and the application is not limited in this regard.
In an embodiment of the present application, the refrigeration system 100 may adjust the opening of the on-off valve 145 to form the liquid high-concentration absorbent solution into a spray of high-concentration absorbent solution, and flow the spray of high-concentration absorbent solution into the absorber 141. The sprayed high-concentration absorbent solution can better absorb gaseous working media.
In one embodiment, the opening degree 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 tube of the absorber 141, the pressure is instantaneously reduced, so that the liquid high-concentration absorbent solution is vaporized into the spray high-concentration absorbent solution.
An output end of the compressor 150 is connected to the first heat exchange tube of the condensing heat exchanger 110 through a pipe, and an input end of the compressor 150 is connected to the third heat exchange tube of the evaporating heat exchanger 130 through a pipe. In the embodiment of the present application, after the compressor 150 flows into the liquid working medium or the two-phase working medium, the liquid working medium or the two-phase working medium is subjected to negative pressure compression to obtain the gaseous working medium. Compressor 150 lets gaseous working fluid flow into the first heat exchange tube of condensing heat exchanger 110.
In the embodiment of the present application, the compressor 150 is a negative pressure compressor. In the working process of the negative pressure compressor, the volume of the suction cavity is gradually increased to form negative pressure. The liquid working medium or the two-phase working medium enters the air suction cavity under the action of pressure difference. The liquid working medium is vaporized into gaseous working medium under the action of negative pressure. The suction chamber progressively compresses in volume allowing the gaseous working fluid to flow into the first heat exchange tube of the condensing heat exchanger 110.
The refrigeration system 100 also includes an exhaust valve 160. The discharge valve 160 is connected between the compressor 150 and the first heat exchange pipe of the condensing heat exchanger 110 through a pipe. The discharge valve 160 is in an off state, and the gaseous working medium in the pipeline between the compressor 150 and the first heat exchange pipe of the condensing heat exchanger 110 cannot be discharged to the outside. The discharge valve 160 is in a conductive state, and the gaseous working medium in the pipeline between the compressor 150 and the first heat exchange pipe of the condensing heat exchanger 110 can be discharged to the outside.
In one embodiment, when compressor 150 outputs gaseous working medium to the first heat exchange tube of condensing heat exchanger 110, a relatively high pressure may result in the piping between compressor 150 and the first heat exchange tube of condensing heat exchanger 110. When the pressure of the pipeline between the compressor 150 and the first heat exchange pipe of the condensation heat exchanger 110 is greater than the set threshold, the exhaust valve 160 is in a conducting state, so that the gaseous working medium inside the pipeline between the compressor 150 and the first heat exchange pipe of the condensation heat exchanger 110 is discharged to the outside, and the pressure of the pipeline between the compressor 150 and the first heat exchange pipe of the condensation heat exchanger 110 is reduced.
In the embodiment of the present application, 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 part through a pipe. The absorption refrigeration module 140 absorbs the gaseous working medium of the third heat exchange tube of the evaporation heat exchanger 130 and outputs the gaseous working medium to the first heat exchange tube of the condensation heat exchanger 110. The refrigeration system 100 uses a circulation loop of the absorption refrigeration module 140, the first heat exchange tube of the condensation heat exchanger 110, the switching valve 120 and the third heat exchange tube of the evaporation heat exchanger 130 to refrigerate the heating component.
The first heat exchange tube of the condensing heat exchanger 110, the switching valve 120, the third heat exchange tube of the evaporating heat exchanger 130, and the compressor 150 are sequentially connected through pipes to form a closed loop. When the absorption refrigeration module 140 cannot work, the refrigeration system 100 uses the circulation loop of the compressor 150, the first heat exchange tube of the condensation heat exchanger 110, the switching valve 120 and the third heat exchange tube of the evaporation heat exchanger 130 to cool the heating component, so that the refrigeration system 100 can continuously cool the heating component.
In the embodiment of the present application, the refrigeration system 100 may enable the circulation loop of the absorption refrigeration module 140, 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 circulation loop of the compressor 150, the first heat exchange tube of the condensation heat exchanger 110, the switch valve 120, and the third heat exchange tube of the evaporation heat exchanger 130 to circulate simultaneously, so as to improve the refrigeration effect of the refrigeration system 100 and reduce the energy consumption of the refrigeration system 100.
As shown in fig. 2, when the absorption refrigeration module 140 can normally operate, the high-concentration absorbent solution of the absorber 141 of the absorption refrigeration module 140 can absorb the gaseous working medium of the third heat exchange tube of the evaporation heat exchanger 130 to form a solution of the dilute-concentration absorbent, so as to realize the conversion of the gaseous working medium into the liquid working medium. The pump 142 of the absorption refrigeration module 140 pumps a low concentration of absorbent solution inside the absorber 141 into the generator 144.
The generator 144 of the absorption refrigeration module 140 heats the solution of the dilute concentration absorbent flowing in to evaporate the refrigerant in the solution into a gaseous working medium. When the generator 144 generates the gaseous working medium, the pressure inside the generator 144 increases, so that the gaseous working medium flows into the first heat exchange tube of the condensation heat exchanger 110.
In the circulation loop of the cold source and the second heat exchange tube of the condensation heat exchanger 110, the low-temperature working medium of the cold source flows into the second heat exchange tube of the condensation 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 condensation heat exchanger 110 is condensed into a liquid working medium. The liquid working medium of the first heat exchange tube of the condensing heat exchanger 110 flows into the on-off valve 120.
The refrigeration system 100 allows the on-off valve 120 to convert the liquid state working medium into a two-phase state working medium by adjusting the opening degree of the on-off valve 120. The two-phase working fluid 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 substance of the third heat exchange tube of the evaporative heat exchanger 130 evaporates into a gaseous working substance. The gaseous working medium of the third heat exchange tube of the evaporative heat exchanger 130 flows into the absorber 141 of the absorption refrigeration module 140.
In the circulation loop of the fourth heat exchange tube of the evaporation heat exchanger 130 and the heating component, the working medium cooled by the fourth heat exchange tube of the evaporation heat exchanger 130 flows into the heating component, so that the temperature of the heating component can be reduced.
As shown in fig. 3, the generator 144 of the absorption refrigeration module 140 heats the solution of the dilute absorbent flowing in to evaporate the refrigerant in the solution into a gaseous working medium. The refrigerant of the low concentration absorbent solution inside the generator 144 is reduced to form a high concentration absorbent solution. 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 on-off valve 145 through the intermediate converter 143.
The refrigeration system 100 adjusts the opening degree of the on-off valve 145 of the absorption refrigeration module 140 to form a spray of the high-concentration absorbent solution from the liquid high-concentration absorbent solution, and flows the spray into the absorber 141. The high-concentration spray-like absorbent solution of the absorber 141 of the absorption refrigeration module 140 can absorb the gaseous working medium of the third heat exchange tube of the evaporative heat exchanger 130.
As shown in fig. 4, when the absorption refrigeration module 140 may not be operated, the refrigeration system 100 stops circulating the circulation loop of the absorption refrigeration module 140, the first heat exchange tube of the condensation heat exchanger 110, the switching valve 120, and the third heat exchange tube of the evaporation heat exchanger 130, and operates the compressor 150. The refrigeration system 100 may circulate a 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".
After the compressor 150 sucks in the liquid working medium or the two-phase working medium of the first heat exchange tube of the condensing heat exchanger 110, negative pressure compression is performed on the liquid working medium or the two-phase working medium to obtain a gaseous working medium. Compressor 150 lets gaseous working fluid flow into the first heat exchange tube of condensing heat exchanger 110.
In the circulation loop of the cold source and the second heat exchange tube of the condensation heat exchanger 110, the low-temperature working medium of the cold source flows into the second heat exchange tube of the condensation 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 condensation heat exchanger 110 is condensed into a liquid working medium. The liquid working medium of the first heat exchange tube of the condensing heat exchanger 110 flows into the on-off valve 120.
The refrigeration system 100 allows the on-off valve 120 to convert the liquid state working medium into a two-phase state working medium by adjusting the opening degree of the on-off valve 120. The two-phase working fluid 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 substance of the third heat exchange tube of the evaporative heat exchanger 130 evaporates into a gaseous working substance. The liquid state working medium or the two-phase state working medium of the third heat exchange tube of the evaporation heat exchanger 130 is again sucked into the compressor 150.
In the circulation loop of the fourth heat exchange tube of the evaporation heat exchanger 130 and the heating component, the working medium cooled by the fourth heat exchange tube of the evaporation heat exchanger 130 flows into the heating component, so that the temperature of the heating component can be reduced. When the absorption refrigeration module 140 can not work, the refrigeration system 100 enables the compressor 150 to work, so that the refrigeration system 100 can uninterruptedly refrigerate the heating component.
In the embodiment of the application, the working medium inside each circulation loop in the refrigeration system 100 adopts water, so that the cost of the refrigeration system 100 can be reduced, and the competitive advantage of the refrigeration system 100 can be improved. The water is used as a pure natural green working medium, and the global warming potential (global warming potential, GWP) is zero, so that the refrigeration system 100 is more in line with the current tendency of carbon peak and carbon neutralization. Both circulation loops of the refrigerating system 100 use water as a working medium, so that the energy consumption ratio (coefficient of performance, COP) of the refrigerating system 100 is improved by more than 16% compared with the COP of the conventional refrigerating system using chilled water as the working medium.
An embodiment of the present application provides an electrical power apparatus comprising a heat generating component and a refrigeration system 100 as described in fig. 1-4 and corresponding protection schemes above. A working fluid circulation loop may be disposed inside the heating element, and the working fluid circulation loop of the heating element is connected with the fourth heat exchange tube of the evaporation heat exchanger 130 of the refrigeration system 100 to form a circulation loop. The refrigerant cooled by the evaporating heat exchanger 130 of the refrigeration system 100 flows into the heat generating components, which can reduce the temperature of the heat generating components.
The power equipment can be an electric automobile, a base station, an outdoor cabinet and the like which are understood by us. The heating component can be an engine, a motor, a battery module, a PCB, an integrated circuit board and the like. Power equipment may be understood in a broad sense as data centers, offices, workshops, etc. The heat generating component may be a closed space. Since the electric power apparatus includes a refrigeration system, the electric power apparatus has all or part of the advantage of the refrigeration system.
The types, the number, the shapes, the connection modes, the structures and the like of the components of the refrigerating system provided by the embodiment of the application are not limited to the embodiment, and all the technical schemes realized under the principle of the application are within the protection scope of the scheme. Any one or more embodiments or illustrations in the specification, combined in a suitable manner, are within the scope of the present disclosure.
The types, the number, the shapes, the installation modes, the structures and the like of the components of the power equipment provided by the embodiment of the application are not limited to the embodiment, and all the technical schemes realized under the principle of the application are within the protection scope of the scheme. Any one or more embodiments or illustrations in the specification, combined in a suitable manner, are within the scope of the present disclosure. The electronic device may be a power module, a new energy automobile, an outdoor base station, an outdoor cabinet or other devices, which is not limited herein.
Finally, the above embodiments are only used to illustrate the technical solution of the present application. It will be appreciated by those skilled in the art that, although the application has been described in detail with reference to the foregoing embodiments, various modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. Such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions in the various embodiments of the application.
Claims (14)
1. A refrigerating system is characterized by comprising a condensing heat exchanger, a first switch valve, an evaporating heat exchanger, an absorption refrigerating module and a compressor, wherein the condensing heat exchanger, the first switch valve and the evaporating heat exchanger are connected through pipelines in sequence,
The condensing heat exchanger is respectively connected to the output end of the absorption refrigeration module and the output end of the compressor through pipelines and is used for condensing the gas working medium output by the absorption refrigeration module and the compressor into liquid working medium;
The evaporation heat exchanger is respectively connected with the input end of the absorption refrigeration module and the input end of the compressor through pipelines and is used for evaporating liquid working medium into gaseous working medium, inputting the gaseous working medium into the absorption refrigeration module or inputting the gaseous working medium into the compressor when the absorption refrigeration module cannot work, and reducing the temperature of a heating component.
2. A refrigeration system according to claim 1 wherein said 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 first switch valve through a pipeline, the other end of the first heat exchange tube 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 tube are connected to the cold source through pipelines.
3. A refrigeration system according to claim 1 or 2 wherein said 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 first switch valve through a pipeline, the other end of the third heat exchange tube 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 tube are connected to the heating component through a pipeline.
4. A refrigeration system according to any one of claims 1 to 3, wherein said absorption refrigeration module comprises an absorber and a generator,
The input end of the absorber is respectively connected to the output ends of the evaporation heat exchanger and the generator through a pipeline and is used for enabling the solution with the first concentration input by the generator to absorb gaseous working medium of the evaporation heat exchanger;
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 with the second concentration input by the absorber and outputting the generated gaseous working medium to the condensing heat exchanger, and the adsorbent content of the solution with the first concentration is higher than that of the solution with the second concentration.
5. The refrigeration system of claim 4, wherein the absorption refrigeration module further comprises an intermediate heat exchanger,
The intermediate heat exchanger is arranged on a pipeline between the absorber and the generator and is used for transferring heat of the solution with the first concentration output by the generator into the solution with the second concentration output by the absorber.
6. A refrigeration system according to claim 5 wherein said intermediate heat exchanger includes a fifth heat exchange tube and a sixth heat exchange tube,
One end of the sixth heat exchange tube is connected to the input end of the absorber through a pipeline, and the other end of the sixth heat exchange tube is connected to the output end of the generator through a pipeline.
7. A refrigeration system as recited in any one of claims 4 to 6 wherein said absorption refrigeration module further comprises a pump,
The pump is arranged on a pipeline between the output end of the absorber and a fifth heat exchange pipe of the intermediate heat exchanger and is used for pumping the solution with 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 on-off valve,
The second switch valve is arranged on a pipeline between the sixth heat exchange pipe of the intermediate heat exchanger and the input end of the absorber and is used for converting the solution with the first concentration in the generator into the solution with the first concentration in the spray form.
9. The refrigeration system as recited in any one of claims 4 to 8 wherein the refrigerant in the absorption refrigeration module is a working medium of the refrigeration system.
10. The refrigeration system of any of claims 4-9, wherein a boiling point of refrigerant within the absorption refrigeration module is less than a boiling point of an absorbent within the absorption refrigeration module.
11. The refrigeration system according to any one of claims 1 to 10, further comprising an exhaust valve,
The exhaust valve is arranged on a pipeline between the condensing heat exchanger and the output end of the compressor and is used for exhausting 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 value.
12. A refrigeration system as claimed in any one of claims 1 to 11 wherein the working fluid of the refrigeration system is water.
13. A refrigeration system as claimed in any one of claims 1 to 12 wherein said compressor is a negative pressure compressor.
14. An electrical device, comprising:
at least one of the heat-generating components,
At least one refrigeration system according to any of claims 1-13, wherein the evaporative heat exchangers of the at least one refrigeration system are connected to the at least one heat generating component via pipes, respectively.
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| CN103868277B (en) * | 2014-04-09 | 2017-02-01 | 浙江海洋学院 | Waste heat absorption refrigeration coordinating two-stage compression refrigeration cold storage device of fishing boat |
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