Temperature control system, data center and energy storage device

Abstract

The embodiment of the utility model provides a temperature control system, a data center and an energy storage device.The temperature control system comprises a compression and expansion all-in-one machine, a condenser and a throttling pipeline connected between the input end of the compression and expansion all-in-one machine and the output end of the condenser; the throttling pipeline is not connected with the heat source and used for conveying the working medium output by the condenser to the compression and expansion all-in-one machine. According to the temperature control system, heat of the working medium flowing out of the condenser is utilized again or repeatedly, so that the utilization rate of heat energy is increased, and the utilization efficiency of waste heat of the data center is improved. The utility model provides an integrated solution with refrigeration, waste heat power generation and waste heat heating functions so as to match the demand changes of the data center and users, and the waste heat of the data center can be effectively utilized to improve the energy utilization efficiency of the data center; the system adopts multi-stage control, system output is flexibly adjusted according to changes of loads and waste heat, the optimal system efficiency is achieved, and the system is compact and high in economical efficiency.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation technology, and in particular to a temperature control system, a data center, and an energy storage device. Background Art

[0002] Some data center refrigeration systems in the related art have waste heat utilization functions, such as using waste heat to generate electricity or provide heat. However, the refrigeration systems in the related art have low waste heat utilization efficiency and cannot effectively solve the problem of heat waste. Utility Model Content

[0003] The embodiments of the present application provide a temperature control system, a data center, and an energy storage device to improve the efficiency of waste heat utilization and improve the utilization rate of thermal energy.

[0004] In the first aspect, an embodiment of the present application provides a temperature control system, which includes a compression-expansion machine, a condenser, an evaporator group, a main pipeline and at least one throttling pipeline. The compression-expansion machine is used to compress or expand a gaseous working medium. The output end of the compression-expansion machine is connected to the input end of the condenser, the output end of the condenser is connected to one end of the main pipeline, the other end of the main pipeline is connected to one end of at least one throttling pipeline, and the other end of at least one throttling pipeline is connected to the input end of the compression-expansion machine; the input end of the evaporator group is connected to the other end of the main pipeline, and the output end of the evaporator group is connected to the input end of the compression-expansion machine. In this embodiment, since the other end of the main pipeline is connected to one end of at least one throttling pipeline, the other end of at least one throttling pipeline is connected to the input end of the compression-expansion machine; the input end of the evaporator group is connected to the other end of the main pipeline, and the output end of the evaporator group is connected to the input end of the compression-expansion machine. Thus, the evaporator group and the throttling pipeline are arranged in parallel, so that the working fluid flowing out of the output end of the condenser can directly flow into the compression-expansion integrated machine through the throttling pipeline without heat exchange with the heat source, and the working fluid flowing out of the output end of the condenser can flow into the compression-expansion integrated machine after heat exchange with the heat source through the evaporator group. In the temperature control system of this embodiment, the working fluid flowing out of the condenser can flow directly to the compression-expansion integrated machine and the condenser without being heated again by the heat source, so that the heat of the working fluid flowing out of the condenser can be used again or multiple times to improve the utilization rate of thermal energy and improve the utilization efficiency of waste heat in the data center. In this embodiment, the working fluid flowing out of the condenser can flow directly to the compression-expansion integrated machine through the throttling pipeline, and then flow to the condenser again. In this process, if the temperature of the liquid working fluid flowing out of the condenser is still high, it may affect the heat absorption efficiency of the evaporator group, and has a certain thermal energy utilization value, so that the thermal energy of this part of the working fluid flowing out of the throttling pipeline can be reused for power generation or heating.

[0005] For example, the part of the working fluid with a higher temperature output by the condenser is used to generate electricity. Specifically, when this part of the working fluid passes through the compression-expansion machine, the expansion of the working fluid can be utilized to convert the thermal energy of the working fluid into kinetic energy, thereby driving the generator to rotate and generate electricity.

[0006] For another example, the part of the working fluid with a higher temperature output by the condenser is used for heating. Specifically, this part of the working fluid directly passes through the compression and expansion machine and flows to the condenser. The heat of this part of the working fluid is again exchanged with the cooling medium of the heating device through the condenser.

[0007] In some embodiments, the integrated compression and expansion machine includes a high-pressure port, at least one medium-pressure port and a low-pressure port, and at least one medium-pressure port is directly connected to the other end of at least one throttling pipeline. When the integrated compression and expansion machine is used to compress a gaseous working medium, the input end of the condenser is connected to the high-pressure port, and the output end of the evaporator group is connected to the low-pressure port; when the integrated compression and expansion machine is used to expand a gaseous working medium, the input end of the condenser is connected to the low-pressure port, and the output end of the evaporator group is connected to the high-pressure port. In this embodiment, since the integrated compression and expansion machine includes a high-pressure port, at least one medium-pressure port and a low-pressure port, the connection with the throttling pipeline and the evaporator group in series can be achieved through one integrated compression and expansion machine, thereby saving the number of integrated compression and expansion machines and reducing the connection difficulty of the temperature control system.

[0008] In some embodiments, the temperature control system further includes a multi-way valve, and the input end of the condenser, the output end of the evaporator group, the high-pressure port and the low-pressure port are all connected to the multi-way valve, and the multi-way valve is used to convert the following two connection relationships, one of which is that the input end of the condenser is connected to the high-pressure port, and the output end of the evaporator group is connected to the low-pressure port; the other connection relationship is that the input end of the condenser is connected to the low-pressure port, and the output end of the evaporator group is connected to the high-pressure port. In this embodiment, when the input end of the condenser is connected to the high-pressure port and the output end of the evaporator group is connected to the low-pressure port, the compression-expansion integrated machine is used to compress the gaseous working medium, and the temperature control system can be used for heating. When the input end of the condenser is connected to the low-pressure port and the output end of the evaporator group is connected to the high-pressure port, the compression-expansion machine is used to expand the gaseous working medium, and the temperature control system can be used for power generation. In this embodiment, the multi-way valve can quickly change the function of power generation or heating of the temperature control system, thereby improving the operability of the temperature control system.

[0009] In some embodiments, the multi-way valve includes a first interface, a second interface, a third interface and a fourth interface, the input end of the condenser is connected to the first interface, the output end of the evaporator group is connected to the third interface, the second interface is connected to the high-pressure port, and the fourth interface is connected to the low-pressure port; when the compression-expansion integrated machine is used to compress the gaseous working medium, the first interface is connected to the second interface, and the third interface is connected to the fourth interface; when the compression-expansion integrated machine is used to expand the gaseous working medium, the first interface is connected to the fourth interface, and the second interface is connected to the third interface. In this embodiment, by changing the connection relationship between the first interface, the second interface, the third interface and the fourth interface of the multi-way valve, the compression-expansion integrated machine can be converted from a compression state to an expansion state, or from an expansion state to a compression state. By converting the working state of the compression-expansion integrated machine, the working mode of the temperature control system can be changed, such as switching the temperature control system from a heating mode to a power generation mode, or from a power generation mode to a heating mode, etc. By setting a multi-way valve, the pipeline connection can be effectively simplified and the difficulty of pipeline layout can be reduced. In addition, the multi-way valve can enable the gaseous working fluid flowing into the medium-pressure port to selectively flow to the high-pressure port to achieve compression of the gaseous working fluid, and selectively flow to the low-pressure port to achieve expansion of the gaseous working fluid.

[0010] In some embodiments, the temperature control system also includes a natural cooling mode. When the first interface is connected to the third interface and the second interface is connected to the fourth interface, the output end of the evaporator group is directly connected to the input end of the condenser, so that the working fluid flowing out of the output end of the evaporator group bypasses the compression expansion machine and directly enters the condenser. In this embodiment, the working fluid flowing through the cold evaporator and the liquid-cooled evaporator can respectively exchange heat with the air-cooled heat source and the liquid-cooled heat source to refrigerate the air-cooled heat source and the liquid-cooled heat source. Since the compression expansion machine does not need to be involved in this process, the heat can be dissipated through the temperature of the natural environment, so that the natural cooling mode can be used when the ambient temperature is low, which can effectively save energy.

[0011] In some embodiments, the number of the medium-pressure port and the throttling pipeline is one, one end of the throttling pipeline is connected to the main pipeline, and the other end of the throttling pipeline is directly connected to the medium-pressure port; the temperature control system also includes a throttling valve, which is arranged on the throttling pipeline. In this embodiment, when the number of the medium-pressure port and the throttling pipeline is one, the manufacturing difficulty of the compression-expansion integrated machine is relatively small.

[0012] In some embodiments, there are multiple medium-pressure ports and throttling pipelines, and the multiple throttling pipelines are connected to the multiple medium-pressure ports in a one-to-one correspondence, and the multiple throttling pipelines are arranged in parallel; the temperature control system also includes multiple throttling valves, and each throttling pipeline is connected to a throttling valve. In this embodiment, when the throttling pipeline and the medium-pressure port are in a one-to-one correspondence, the connection difficulty of the medium-pressure port and the throttling pipeline can be simplified, and it is not easy to cause connection confusion.

[0013] In some embodiments, the flow rates of the throttle valves on different throttle pipelines are different. Due to the different flow rates of different throttle valves, the pressures of the gaseous working medium converted from the working medium in different throttle pipelines after passing through the throttle valves are different, so that the pressures of the gaseous working medium flowing to the medium-pressure port through different throttle pipelines are different, so as to adapt to different power generation or heat supply requirements.

[0014] In some embodiments, the number of throttle valves is less than the number of throttle pipelines, and the throttle valves are connected to the common trunk of multiple throttle pipelines. In this embodiment, since the throttle valves are connected to the common trunk of multiple throttle pipelines, the number of throttle valves can be reduced, and the cost can be reduced. Moreover, the pressure and temperature of the gaseous working fluids flowing to different medium-pressure ports through multiple throttle pipelines are the same, and the compression-expansion integrated machine does not need to design different medium-pressure ports corresponding to the input working fluids of different pressures, which is conducive to reducing the design difficulty of the compression-expansion integrated machine.

[0015] In some embodiments, the evaporator group includes an air-cooled evaporation circuit and a liquid-cooled evaporation circuit, the air-cooled evaporation circuit includes an air-cooled evaporator, an air-cooled pipeline, and an air-cooled control valve and an air-cooled expansion valve connected to the air-cooled pipeline, the two ends of the air-cooled pipeline are respectively connected to the output end and the input end of the air-cooled steamer to form a circuit, the air-cooled expansion valve is connected to the input end of the air-cooled evaporator, the liquid-cooled evaporation circuit includes a liquid-cooled evaporator, a liquid-cooled pipeline, and a liquid-cooled control valve and a liquid-cooled expansion valve connected to the liquid-cooled pipeline, the two ends of the liquid-cooled pipeline are respectively connected to the output end and the input end of the liquid-cooled steamer to form a circuit, and the liquid-cooled expansion valve is connected to the input end of the liquid-cooled evaporator; the air-cooled evaporation circuit and the liquid-cooled evaporation circuit are connected in series; the input end of the air-cooled evaporation circuit is connected to the output end of the condenser, the output end of the air-cooled evaporation circuit is connected to the input end of the liquid-cooled evaporation circuit, and the output end of the liquid-cooled evaporation circuit is connected to the high-pressure port or the low-pressure port of the compression-expansion integrated machine; the evaporator group also includes an air-liquid control valve connected between the air-cooled evaporation circuit and the liquid-cooled evaporation circuit. In this embodiment, the series connection of the air-cooled evaporator and the liquid-cooled evaporator can be realized by closing the air-cooled control valve and the liquid-cooled control valve. When the air-cooled control valve, the liquid-cooled control valve and the air-liquid control valve are all opened, the working fluid flowing out of the condenser can flow to the compression-expansion integrated machine through the air-cooled expansion valve, the air-cooled evaporator, the air-liquid control valve, and the liquid-cooled control valve in sequence, and can also flow to the compression-expansion integrated machine through the air-cooled control valve, the air-liquid control valve, the liquid-cooled expansion valve and the liquid-cooled evaporator in sequence. When the air-cooled control valve and the air-liquid control valve are both opened and the liquid-cooled control valve is closed, the working fluid flowing out of the condenser preferentially flows to the compression-expansion integrated machine through the liquid-cooled evaporator. When the air-liquid control valve and the air-liquid control valve are both opened and the air-cooled control valve is closed, the working fluid flowing out of the condenser preferentially flows to the compression-expansion integrated machine through the air-cooled evaporator. Through the air-cooled circuit and the liquid-cooled circuit in this embodiment, the air-cooled evaporator and the liquid-cooled evaporator can be connected in parallel or in series, and can be adapted to a variety of scenarios.

[0016] In some embodiments, the evaporator group includes an air-cooled evaporation circuit and a liquid-cooled evaporation circuit, wherein the air-cooled evaporation circuit includes an air-cooled evaporator, the liquid-cooled evaporation circuit includes a liquid-cooled evaporator, and the air-cooled evaporator and the liquid-cooled evaporator are connected in parallel. In this embodiment, since the air-cooled evaporator and the liquid-cooled evaporator are connected in parallel, the temperature and pressure of the working fluid flowing out of the condenser when flowing to the air-cooled evaporator and the liquid-cooled evaporator are the same, and the heat dissipation effect can be improved for a liquid-cooled heat source with relatively severe heat generation.

[0017] In some embodiments, the evaporator group includes an air-cooled evaporation circuit and a liquid-cooled evaporation circuit, wherein the air-cooled evaporation circuit includes an air-cooled evaporator, the liquid-cooled evaporation circuit includes a liquid-cooled evaporator, and the air-cooled evaporator and the liquid-cooled evaporator are connected in series. In this embodiment, since the air-cooled evaporator and the liquid-cooled evaporator are connected in series, the waste heat of the working fluid passing through the air-cooled evaporator can be collected by the air-cooled heat source, then flows through the liquid-cooled evaporator, and is heated again by the liquid-cooled heat source, thereby increasing the temperature of the working fluid entering the compression-expansion integrated machine, so as to improve the power generation efficiency of the compression-expansion integrated machine.

[0018] In some embodiments, if the temperature of the working fluid flowing out of the condenser is greater than a preset threshold, all or part of the working fluid flowing out of the condenser flows directly to the compression-expansion machine through the throttling pipeline to achieve effective use of heat.

[0019] In some embodiments, if the temperature of the working fluid flowing out of the condenser is less than a preset threshold, all or part of the working fluid flowing out of the condenser flows to the evaporator group to perform heat exchange with the heat source when passing through the evaporator group.

[0020] In some embodiments, the temperature control system further includes a plurality of liquid pump circuits, each of which includes a liquid pump, a liquid pump pipeline, and a one-way valve connected to the liquid pump pipeline. The two ends of the liquid pump pipeline are respectively connected to the output end and the input end of the liquid pump to form a circuit, and the plurality of liquid pump circuits are connected in series; the temperature control system further includes a liquid pump control valve connected between two adjacent liquid pump circuits; each throttling pipeline is connected in series with at least one liquid pump circuit, and at least one liquid pump circuit is connected in series between the input end of the evaporator group and the output end of the condenser. In this embodiment, the liquid pump circuit can increase the circulation rate of the working fluid in the temperature control system when the compression-expansion machine is not used to compress gas, and can increase the power generation efficiency of the temperature control system when the compression-expansion machine is used for expansion.

[0021] In some embodiments, the temperature control system further includes a generator, which is connected to the compression-expansion machine to drive the generator to rotate when the compression-expansion machine is used for expansion. When the compression-expansion machine is used to expand the working fluid, the expanded working fluid can drive the generator to rotate to generate electricity.

[0022] In some embodiments, there are multiple compression and expansion machines, each of which includes two ports, a high-pressure port and a low-pressure port. The other end of a throttling pipeline is connected to one of the high-pressure port and the low-pressure port of one compression and expansion machine, the other of the high-pressure port and the low-pressure port of one compression and expansion machine is connected to one of the high-pressure port and the low-pressure port of another compression and expansion machine, and the other of the high-pressure port and the low-pressure port of another compression and expansion machine is connected to the input end of the condenser.

[0023] In a second aspect, an embodiment of the present application provides a cooling, heating and power integrated machine, comprising a housing and a temperature control system as described in any one of the first aspects above, wherein the temperature control system is disposed in the housing. The modular design of the cooling, heating and power integrated machine in this embodiment can be applied to data centers or energy storage devices, such as prefabricated cabins.

[0024] In a third aspect, an embodiment of the present application provides a data center, including a heat source and a temperature control system as described in any one of the first aspects above, wherein the evaporator is used to be connected to the heat source for heat exchange with the heat source.

[0025] In a fourth aspect, an energy storage device includes a battery module and a temperature control system as described in any one of the first aspects above, wherein the evaporator is connected to the battery module for heat exchange with the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0027] Figure 1 A schematic diagram of a data center provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of a temperature control system provided in an embodiment of the present application;

[0029] Figure 3 for Figure 2 A schematic diagram of the structure of the temperature control system in the embodiment when the throttling pipeline has multiple throttling pipelines;

[0030] Figure 4 for Figure 2 A schematic diagram of the structure of the temperature control system in the embodiment when the throttling pipeline has multiple throttling pipelines;

[0031] Figure 5 for Figure 2 A schematic diagram of a temperature control system of an embodiment of the invention for supplying heat to the outside;

[0032] Figure 6 A schematic diagram of the temperature control system of the embodiment in the figure being used for power generation;

[0033] Figure 7 For Figure 2 Based on the temperature control system in the embodiment of FIG, a structural schematic diagram of a more specific temperature control system with an evaporator group and a liquid pump added;

[0034] Fig. 8A for Figure 7 A schematic diagram of air cooling in the temperature control system of the embodiment in the mechanical cooling mode;

[0035] Figure 8B for Figure 7 A schematic diagram of liquid cooling in a mechanical cooling mode of the temperature control system in the embodiment;

[0036] Figure 8C for Figure 7 A schematic diagram of the temperature control system in the embodiment in the mechanical refrigeration mode with air cooling and liquid cooling together;

[0037] Fig. 9 for Figure 7 A schematic diagram of the temperature control system in the embodiment in natural cooling;

[0038] Fig. 10A for Figure 7 A schematic diagram of air-cooled power generation in the power generation mode of the temperature control system in the embodiment;

[0039] Fig. 10B for Figure 7 A schematic diagram of liquid cooling power generation in the power generation mode of the temperature control system in the embodiment;

[0040] Fig. 10C for Figure 7 A schematic diagram of the temperature control system in the embodiment in the power generation mode, wherein the air-cooled power generation and the liquid-cooled power generation are used together to generate power;

[0041] Fig.11 A schematic diagram of the structure of another temperature control system provided in an embodiment of the present application. Description of the drawings:

[0043] 1000. Data center; 1. Computer room; 2. Heat source; 2a. Air-cooled heat source; 2b. Liquid-cooled heat source; 3. Temperature control system; 10. Compression expansion machine; 11. High-pressure port; 12. Low-pressure port; 13. Medium-pressure port; 20. Condenser; 30. Evaporator group; 31. Evaporator; 32. Expansion valve; 33. Air-cooled evaporation circuit; 331. Air-cooled evaporator; 332. Air-cooled pipeline; 333. Air-cooled control valve; 334. Air-cooled expansion valve; 34. Liquid-cooled evaporation circuit; 341. Liquid-cooled evaporator; 342. Liquid-cooled pipeline; 343. Liquid-cooled control Valve; 344, liquid-cooled expansion valve; 35, fan; 36, air-liquid control valve; 41, throttling pipeline; 42, throttling valve; 43, main pipeline; 50, multi-way valve; 51, first interface; 52, second interface; 53, third interface; 54, fourth interface; 60, liquid pump circuit; 601, first liquid pump circuit; 602, second liquid pump circuit; 61, liquid pump; 611, first liquid pump; 612, second liquid pump; 62, liquid pump pipeline; 63, one-way valve; 631, first one-way valve; 632, second one-way valve; 64, liquid pump control valve; 70, generator. DETAILED DESCRIPTION

[0044] The following first explains some terms involved in the embodiments of the present application.

[0045] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] In this specification, the terms "perpendicular", "parallel", etc. are explained.

[0047] Vertical: The verticality defined in this application is not limited to an absolute vertical intersection relationship (angle of 90 degrees). It allows for non-absolute vertical intersection relationships caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. It also allows for errors in a small angle range. For example, the assembly error range of 80 to 100 degrees can be understood as a vertical relationship.

[0048] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism, which allows for situations where the absolute parallelism is not caused by factors such as assembly tolerance, design tolerance, and influence of structural flatness. These situations will lead to the sliding fitting part and the first door panel not being absolutely parallel, but this application also defines this situation as parallelism.

[0049] Figure 1 A schematic diagram of a data center 1000 provided in an embodiment of the present application shows an application scenario of the temperature control system 3 in the data center 1000.

[0050] Reference Figure 1 The data center 1000 of the embodiment of the present application includes a computer room 1, in which a plurality of heat sources 2 are arranged, some of which are air-cooled heat sources 2a that need to be cooled by air cooling, such as at least one IT device (such as a server, a storage device, a network device) arranged in the computer room 1, and some of which are liquid-cooled heat sources 2b that need to be cooled by liquid cooling, such as a power supply device (such as an uninterruptible power supply or other energy storage batteries, etc.) arranged in the computer room 1.

[0051] Since air-cooled heat sources 2a such as IT equipment and liquid-cooled heat sources 2b such as power supply equipment will generate a large amount of heat during operation, in order to ensure efficient operation of the air-cooled heat sources 2a and the liquid-cooled heat sources 2b, it is necessary to dissipate heat from the air-cooled heat sources 2a and the liquid-cooled heat sources 2b in a timely manner. Therefore, the data center 1000 in the embodiment of the present application also includes a temperature control system 3, which is used to perform air cooling on the air-cooled heat sources 2a and to perform liquid cooling on the liquid-cooled heat sources 2b.

[0052] It should be noted that in the embodiment of the present application, the data center 1000 may be a micromodule data center 1000, a prefabricated data center 1000, or a floor or room formed by a building for placing IT equipment. Based on the above different forms of data centers 1000, the temperature control system 3 may be placed inside the computer room 1 of the data center 1000, or outside the computer room 1, or partly inside the computer room 1 and partly outside the computer room 1.

[0053] In some implementation scenarios, the data center 1000 includes not only IT equipment and power supply devices, but also fire-fighting equipment and other supporting equipment.

[0054] Figure 2 This is a schematic diagram of a temperature control system 3 provided in an embodiment of the present application. The temperature control system 3 in this embodiment has at least the functions of cooling, heating and providing power. The temperature control system 3 in this embodiment can be applied not only to data centers, but also to other equipment that requires temperature control, such as energy storage devices, energy storage prefabricated cabins, etc.

[0055] Reference Figure 2 The temperature control system 3 of the embodiment of the present application includes a compression-expansion integrated machine 10 , a condenser 20 and an evaporator group 30 .

[0056] The compression-expansion integrated machine 10 is a core component for the temperature control system 3 to perform its functions of refrigeration, heating and power supply. The mechanical form of the compression-expansion integrated machine 10 can be a scroll machine, a screw machine, or a speed turbine machine, which can realize efficient compression and expansion processes. During the compression process, the working fluid enters the compression-expansion integrated machine 10 from the low-pressure port of the compression-expansion integrated machine 10, and the compressed working fluid flows out of the high-pressure port of the compression-expansion integrated machine 10. During the expansion process, the working fluid enters the compression-expansion integrated machine 10 at the high-pressure port of the compression-expansion integrated machine 10, and then the expansion process is carried out. After the expansion, the low-temperature and low-pressure working fluid flows out of the low-pressure port of the compression-expansion integrated machine 10. Among them, the working fluid may include water, ammonia water, freon, R12 (difluoromethane), R22 (difluoromethane), R134a (tetrafluoroethane), R407c, R410a, R290 (propane) or R32 (difluoromethane), etc.

[0057] The condenser 20 is used to cool the working fluid. For example, the working fluid can be cooled by the cold provided by a cooling tower, or by spraying, or it can be directly connected to an external heating device (such as a user's heating system) to exchange heat with a cooling medium (such as water) in the heating device to achieve heat dissipation. Specifically, the condenser 20 is used to cool the working fluid output by the compression and expansion machine 10. The working fluid output by the compression and expansion machine 10 is a gaseous working fluid. After the gaseous working fluid is cooled by the condenser 20, it is converted into a liquid working fluid. During this process, the working fluid in the condenser 20 can release a large amount of heat. For example, after the condenser 20 is connected to the heating device, the large amount of heat released by the working fluid in the condenser 20 can provide a large amount of heat for the heating device.

[0058] The evaporator group 30 is used to perform heat exchange with the heat source 2 to achieve refrigeration treatment of the heat source 2 in the machine room 1. Specifically, the evaporator group 30 includes an evaporator 31 and an expansion valve 32 located before the input end of the evaporator 31. The expansion valve 32 can be used to change the flow rate of the working fluid to suddenly change the pressure environment of the working fluid, so as to achieve the conversion of the liquid working fluid into a gaseous working fluid. Specifically, the expansion valve 32 can be used to convert the liquid working fluid flowing out of the condenser 20 into a gaseous working fluid. In the process of converting the liquid working fluid into a gaseous working fluid, the liquid working fluid vaporizes and absorbs heat, so that the temperature of the gaseous working fluid after vaporization is greatly reduced. The gaseous working fluid after cooling flows through the evaporator 31, and then performs heat exchange with the heat generated by the heat source 2, so as to achieve refrigeration treatment of the heat source 2. The gaseous working fluid after heat exchange with the heat source 2 flows to the compression and expansion integrated machine 10 again to realize the circulation of the working fluid in the temperature control system 3.

[0059] It can be understood that when the compression-expansion integrated machine 10 realizes the compression function, the refrigeration effect of the temperature control system 3 is good, the evaporator 31 absorbs more heat, and has a good cooling effect on the heat source 2, and the condenser 20 dissipates more heat and provides more heat to the heating device. When the compression-expansion integrated machine 10 realizes the expansion function, it can provide power through the expanded gaseous working fluid. For example, when it is connected to a generator, the generator can be driven to rotate by the expanded gaseous working fluid to realize the power generation function. Therefore, the temperature control system 3 of the embodiment of the present application is an integrated machine that can cool, heat and supply electricity, which can effectively improve the utilization efficiency of the heat of the data center 1000, improve the energy utilization rate of the data center 1000, and improve the PUE (Power Usage Effectiveness) of the data center 1000.

[0060] In some embodiments, the output end of the condenser 20 is connected to the input end of the evaporator group 30, the output end of the evaporator group 30 is connected to the input end of the compression and expansion machine 10, and the output end of the compression and expansion machine 10 is connected to the input end of the condenser 20. For the convenience of description, the loop composed of the compression and expansion machine 10, the condenser 20 and the evaporator group 30 is set as a temperature control loop.

[0061] In this embodiment, the working fluid circulates in the temperature control loop. When the compression-expansion machine 10 is used to compress the gaseous working fluid, the gaseous working fluid entering the compression-expansion machine 10 is compressed into a gaseous working fluid with a higher pressure and temperature, and then flows to the condenser 20. Through the condenser 20, the gaseous working fluid can exchange heat with the cooling medium and liquefy the gaseous working fluid into a liquid working fluid. Then, when passing through the evaporator group 30, it can be converted from a liquid working fluid into a gaseous working fluid through the expansion valve 32, and the gaseous working fluid can exchange heat with the heat source 2 through the evaporator 31 to cool the heat source 2. When the compression-expansion machine 10 is used for expansion, the gaseous working fluid entering the compression-expansion machine 10 is expanded to become a gaseous working fluid with lower pressure and temperature. In this process, the gaseous working fluid can be used as power to output driving force to the outside, and then flow to the condenser 20. Through the condenser 20, the gaseous working fluid can exchange heat with the cooling medium and liquefy the gaseous working fluid into a liquid working fluid. Then, when passing through the evaporator group 30, it can be converted from liquid working fluid to gaseous working fluid through the expansion valve 32, and the gaseous working fluid can be heat exchanged with the heat source 2 through the evaporator 31, so as to heat the gaseous working fluid through the heat source 2.

[0062] Specifically, when the compression-expansion machine 10 is used to compress the gaseous working fluid, the temperature and pressure of the gaseous working fluid entering the condenser 20 are higher, and a large amount of heat can be released. At this time, it can be used for heating. For example, in some embodiments, the condenser 20 is provided with a heating port for connecting to a heating device, and the heating device is connected to the heating port through a pipeline, so that the cooling medium (such as water) in the heating device flows through the condenser 20, and exchanges heat with the working fluid in the condenser 20, and absorbs a large amount of heat from the gaseous working fluid, so as to realize heating of the heating device and liquefy the gaseous working fluid.

[0063] When the compression-expansion machine 10 is used to expand the gaseous working medium, at this time, since the gaseous working medium can be used as a power to output driving force to the outside, it can be used to generate electricity. For example, in some embodiments, the temperature control system 3 also includes a generator 70, and the generator 70 is connected to the compression-expansion machine 10. When the compression-expansion machine 10 is used to expand the gaseous working medium, the gaseous working medium drives the generator 70 to rotate, thereby realizing the power generation function. It can be understood that the higher the temperature of the gaseous working medium, the greater the pressure, and the higher the internal energy, the higher the power generation performance.

[0064] In the temperature control loop of this embodiment, when the heat absorbed by the working fluid during the heat exchange between the evaporator 31 and the heat source 2 is relatively high, and the heat dissipated by the working fluid during the heat exchange between the condenser 20 and the cooling medium is less than the heat absorbed during the heat exchange between the evaporator 31 and the heat source 2, the temperature of the working fluid after it flows out of the condenser 20 is still relatively high. If it passes directly through the evaporator group 30, it will affect the heat exchange efficiency between the working fluid and the heat source 2 in the evaporator 31, reduce the heat absorption effect, and reduce the cooling effect on the heat source 2. Moreover, if the working fluid after flowing out of the condenser 20 is at a relatively high temperature, it still has the value of providing heat or driving force. If it can be used, it can effectively improve the heat utilization efficiency and improve the PUE of the data center 1000.

[0065] Figure 3 for Figure 2 The temperature control system 3 in the embodiment of FIG. 3 has a plurality of throttling pipes 41 when the structure diagram, Figure 3 Each throttling pipeline 41 in the embodiment is connected with a throttling valve 42; Figure 4 for Figure 2 The temperature control system 3 in the embodiment of FIG. 3 has a plurality of throttling pipes 41 when the structure diagram, Figure 4 In the embodiment of the present invention, multiple throttling pipelines 41 share a throttling valve 42, and the throttling valve 42 is not connected to the throttling pipeline 41, but is connected to the common trunk of the multiple throttling pipelines 41. The number of throttling pipelines 41 of the temperature control system 3 can be one or more, for example Figure 2 Only one throttle line 41 of the temperature control system 3 is shown.

[0066] In order to improve the heat utilization efficiency and increase the PUE of the data center by 1000, refer to Figure 2-Figure 4, the temperature control system 3 also includes a trunk pipeline 43 and at least one throttling pipeline 41, the output end of the compression-expansion machine 10 is connected to the input end of the condenser 20, the output end of the condenser 20 is connected to one end of the trunk pipeline 43, the other end of the trunk pipeline 43 is connected to one end of the at least one throttling pipeline 41, and the other end of the at least one throttling pipeline 41 is connected to the input end of the compression-expansion machine 10; the input end of the evaporator group 30 is connected to the other end of the trunk pipeline 43, and the output end of the evaporator group 30 is connected to the input end of the compression-expansion machine 10. In this embodiment, since the other end of the trunk pipeline 43 is connected to one end of the at least one throttling pipeline 41, the other end of the at least one throttling pipeline 41 is connected to the input end of the compression-expansion machine 10; the input end of the evaporator group 30 is connected to the other end of the trunk pipeline 43, and the output end of the evaporator group 30 is connected to the input end of the compression-expansion machine 10. Thus, the evaporator group 30 and the throttling line 41 are arranged in parallel, so that the working fluid flowing out of the output end of the condenser 20 can directly flow into the compression-expansion machine 10 through the throttling line 41 without heat exchange with the heat source 2, and the working fluid flowing out of the output end of the condenser 20 can flow into the compression-expansion machine 10 after heat exchange with the heat source 2 through the evaporator group 30. In the temperature control system 3 of this embodiment, the working fluid flowing out of the condenser 20 is not heated again by the heat source 2, that is, it flows directly to the compression-expansion machine 10 and the condenser 20, so that the heat of the working fluid flowing out of the condenser 20 can be used again or multiple times to improve the utilization rate of thermal energy and improve the utilization efficiency of the waste heat of the data center 1000. In this embodiment, the working fluid flowing out of the condenser 20 can flow directly to the compression and expansion machine 10 through the throttling line 41, and then flow to the condenser 20 again. During this process, if the temperature of the liquid working fluid flowing out of the condenser 20 is still relatively high, it may affect the heat absorption efficiency of the evaporator group 30 and has a certain thermal energy utilization value, so that the thermal energy of this part of the working fluid flowing out of the throttling line 41 can be reused for power generation or heating.

[0067] For example, the part of the working fluid with a higher temperature output by the condenser 20 is used to generate electricity. Specifically, when this part of the working fluid passes through the compression-expansion machine 10, the expansion of the working fluid can be utilized to convert the thermal energy of the working fluid into kinetic energy, thereby driving the generator 70 to rotate and generate electricity.

[0068] For another example, the part of the working fluid with a higher temperature output by the condenser 20 is used for heating. Specifically, this part of the working fluid directly passes through the compression and expansion machine 10 and flows to the condenser 20. The heat of this part of the working fluid is again exchanged with the cooling medium of the heating device through the condenser 20.

[0069] In addition, since the part of the working fluid with a higher temperature output by the condenser 20 does not flow directly to the evaporator 31, but enters the evaporator 31 at a lower temperature after further heat dissipation by the condenser 20, it will not affect the heat absorption performance of the working fluid in the evaporator 31, and will not reduce the refrigeration performance of the temperature control system 3 in this embodiment.

[0070] In this embodiment, "not connected to heat source 2" means not directly or indirectly connected to heat source 2, and will not generate heat exchange with the heat generated by heat source 2. "Heat source 2" refers to a component that can actively generate heat, such as a component used in Figure 1 In the data center 1000, the heat source 2 is IT equipment or energy storage batteries.

[0071] In some embodiments, the temperature control system 3 further includes at least one throttle valve 42, which is connected to the main pipeline 43 or at least one throttle pipeline 41. In this embodiment, the throttle valve 42 provided on the main pipeline 43 or the throttle pipeline 41 can convert the liquid working medium into a gaseous working medium and enter the compression-expansion integrated machine 10, so as to compress or expand the gaseous working medium through the compression-expansion integrated machine 10. Through the main pipeline and at least one throttle pipeline 41, the working medium can be directly sent to the compression-expansion integrated machine 10 without heat exchange with the heat source 2, so as to utilize the heat twice or multiple times and improve the utilization efficiency of the heat.

[0072] The throttle valve 42, like the expansion valve 32, can be used to change the flow rate of the working medium to suddenly change the pressure environment of the working medium, and can realize the conversion of the liquid working medium into the gaseous working medium. Specifically, the throttle valve 42 can be used to convert the liquid working medium flowing out of the condenser 20 into the gaseous working medium. In the process of converting the liquid working medium into the gaseous working medium, the liquid working medium vaporizes and absorbs heat, so that the temperature of the gaseous working medium after vaporization is greatly reduced.

[0073] In some embodiments, if the temperature of the working fluid flowing out of the condenser 20 is greater than a preset threshold, all or part of the working fluid flowing out of the condenser 20 flows directly to the compression and expansion machine 10 through the throttling line 41 to achieve effective use of heat.

[0074] In some embodiments, if the temperature of the working fluid flowing out of the condenser 20 is less than a preset threshold, all or part of the working fluid flowing out of the condenser 20 flows to the evaporator group 30 to perform heat exchange with the heat source 2 when passing through the evaporator group 30 .

[0075] It can be understood that the temperature of the working fluid flowing out of the condenser 20 can be detected by a temperature sensor.

[0076] Reference Figure 2-Figure 4In some embodiments, the compression expansion machine 10 is a multi-stage compression expansion machine. Specifically, the compression expansion machine 10 includes a high-pressure port 11, a low-pressure port 12, and at least one medium-pressure port 13. When the number of the medium-pressure port 13 is one (such as Figure 2 ), the compression-expansion integrated machine 10 is a two-stage compression-expansion machine. In this case, the compression-expansion integrated machine 10 can perform two compressions or expansions on the working fluid. When the number of the intermediate pressure ports 13 is n (n>1) (e.g. Figure 3 and Figure 4 ), then the working fluid can be compressed or expanded n+1 times.

[0077] In some embodiments, when the compression-expansion machine 10 is used to compress a gaseous working medium, the input end of the condenser 20 is connected to the high-pressure port 11, the output end of the evaporator group 30 is connected to the low-pressure port 12, one end of the throttling line 41 is connected to the main line 43, and the other end of the throttling line 41 is connected to the medium-pressure port 13. In this embodiment, the gaseous working medium flowing from the evaporator 31 to the compression-expansion machine 10 can be heated for the first time when it passes through the condenser 20 for the first time. Without passing through the evaporator 31, it is directly transported to the compression-expansion machine 10 through the throttling line 41 and then transported to the condenser 20 again. At this time, it can be heated for the second time or even more times, thereby improving the utilization efficiency of heat.

[0078] In some embodiments, each throttling line 41 is connected to a medium-pressure port 13, and a medium-pressure port 13 is connected to a throttling line 41, that is, the throttling line 41 and the medium-pressure port 13 are in a one-to-one correspondence. In this embodiment, when the throttling line 41 and the medium-pressure port 13 are in a one-to-one correspondence, the connection difficulty of the medium-pressure port 13 and the throttling line 41 can be simplified, and it is not easy to cause connection confusion.

[0079] It is understandable that, in some other embodiments, one medium-pressure port 13 may be connected to a plurality of throttling pipelines 41 , or one throttling pipeline 41 may be connected to a plurality of medium-pressure ports 13 .

[0080] Reference Figure 3In some embodiments, the number of throttle valves 42 is multiple, for example, corresponding to the number of throttle pipelines 41, each throttle pipeline 41 is connected to a throttle valve 42, and the flow rates of the throttle valves 42 on different throttle pipelines 41 are different, so that different medium-pressure ports 13 input gaseous working media of different pressures. In this embodiment, since each throttle pipeline 41 is connected to a throttle valve 42, the flow rates of different throttle valves 42 are different, so that the working media of different throttle pipelines 41 are converted into gaseous working media with different pressures after passing through the throttle valve 42, so that the pressures of the gaseous working media flowing to the medium-pressure port 13 through different throttle pipelines 41 are different, so as to adapt to different power generation or heat supply needs.

[0081] Reference Figure 4 In some embodiments, the number of throttle valves 42 is less than the number of throttle pipelines 41, for example, the number of throttle valves 42 is one, the number of throttle pipelines 41 is multiple, and the throttle valve 42 is connected to the common trunk of multiple throttle pipelines 41. Specifically, the liquid working medium flowing out of the output end of the condenser 20 becomes a gaseous working medium after passing through the throttle valve 42, and then flows to multiple throttle pipelines 41 respectively, and flows to different medium-pressure ports 13 through multiple throttle pipelines 41. Such a design can reduce the number of throttle valves 42 and reduce costs. Moreover, the pressure and temperature of the gaseous working medium flowing to different medium-pressure ports 13 through multiple throttle pipelines 41 are the same, and the compression and expansion integrated machine 10 does not need to design different medium-pressure ports 13 corresponding to the input working mediums of different pressures, which is conducive to reducing the design difficulty of the compression and expansion integrated machine 10.

[0082] Figure 5 for Figure 2 The temperature control system 3 of the embodiment is a schematic diagram for supplying heat to the outside. At this time, the compression-expansion integrated machine 10 is used as a compressor to compress the gaseous working medium. Figure 6 The temperature control system 3 of the embodiment in the figure is a schematic diagram for power generation. At this time, the compression-expansion integrated machine 10 is used as an expander for expanding the gaseous working medium.

[0083] In order to convert the compression or expansion process of the compression and expansion machine 10, refer to Figure 2 , Figure 5 and Figure 6 , taking the medium pressure port 13 as one and the throttling line 41 as one as an example, in some embodiments, the temperature control system 3 further includes a multi-way valve 50, the multi-way valve 50 includes a first interface 51, a second interface 52, a third interface 53 and a fourth interface 54, the input end of the condenser 20 is connected to the first interface 51, the output end of the evaporator group 30 is connected to the third interface 53, the second interface 52 is connected to the high pressure port 11, and the fourth interface 54 is connected to the low pressure port 12. The compression expansion machine 10 is used for compressing the gaseous working medium (such as Figure 5), the first interface 51 is connected to the second interface 52, and the third interface 53 is connected to the fourth interface 54, so that the working fluid flowing from the throttling pipeline 41 to the medium-pressure port 13 can flow to the high-pressure port 11 to compress the working fluid. The compression and expansion machine 10 is used to expand the gaseous working fluid (such as Figure 6 ), the first interface 51 is connected to the fourth interface 54, and the second interface 52 is connected to the third interface 53, so that the working fluid flowing from the throttling line 41 to the medium-pressure port 13 can flow to the low-pressure port 12 to expand the working fluid.

[0084] In this embodiment, by changing the connection relationship between the first interface 51, the second interface 52, the third interface 53 and the fourth interface 54 of the multi-way valve 50, the compression-expansion integrated machine 10 can be converted from a compression state to an expansion state, or from an expansion state to a compression state. By converting the working state of the compression-expansion integrated machine 10, the working mode of the temperature control system 3 can be changed, such as switching the temperature control system 3 from a heating mode to a power generation mode, or from a power generation mode to a heating mode. Through the setting of the multi-way valve 50, the pipeline connection can be effectively simplified and the difficulty of pipeline layout can be reduced. In addition, through the multi-way valve 50, the gaseous working fluid flowing into the medium-pressure port 13 can selectively flow to the high-pressure port 11 to achieve compression of the gaseous working fluid, and selectively flow to the low-pressure port 12 to achieve expansion of the gaseous working fluid.

[0085] Specifically, when the temperature control system 3 is used for heating, the compression-expansion machine 10 is used to compress the gaseous working medium, the first interface 51 is connected to the second interface 52, and the third interface 53 is connected to the fourth interface 54. At this time, the low-pressure port 12 and the medium-pressure port 13 are both used to input the gaseous working medium into the compression-expansion machine 10, and the high-pressure port 11 is used to output the gaseous working medium. At this time, the flow path of the working medium is: the gaseous working medium flowing in through the low-pressure port 12 flows out through the high-pressure port 11, and then flows to the condenser 20 through the second interface 52 and the first interface 51. After flowing out of the condenser 20, it can flow to the medium-pressure port 13 through the throttling pipeline 41, and then enter the compression-expansion machine 10 again through the medium-pressure port 13, and flow from the high-pressure port 11 to the condenser 20 through the second interface and the first interface 51 again; it can also flow to the third interface 53 and the fourth interface 54 after passing through the evaporator group 30 and flow to the low-pressure port 12 again.

[0086] When the temperature control system 3 is used for power generation, the compression-expansion machine 10 is used to expand the gaseous working medium, the first interface 51 is connected to the fourth interface 54, and the second interface 52 is connected to the third interface 53. At this time, the high-pressure port 11 and the medium-pressure port 13 are both used to input the gaseous working medium into the compression-expansion machine 10, and the low-pressure port 12 is used to output the gaseous working medium. At this time, the flow path of the working medium is: the gaseous working medium flowing in through the high-pressure port 11 flows out through the low-pressure port 12, and then flows to the condenser 20 through the fourth interface 54 and the first interface 51. After flowing out of the condenser 20, it can flow to the medium-pressure port 13 through the throttling pipeline 41, and then enter the compression-expansion machine 10 again through the medium-pressure port 13, and flow from the low-pressure port 12 to the condenser 20 through the four interfaces and the first interface 51 again; it can also flow to the third interface 53 and the second interface 52 after passing through the evaporator group 30 and flow to the high-pressure port 11 again.

[0087] It is understandable that the multi-way valve 50 can be replaced by a plurality of switch valves and connecting pipelines.

[0088] Figure 7 For Figure 2 On the basis of the temperature control system 3 in the embodiment, a more specific structural diagram of the temperature control system 3 is provided after the evaporator group 30 and the liquid pump 61 are added.

[0089] Reference Figure 7 In some embodiments, the evaporator group 30 includes an air-cooled evaporation circuit 33 and a liquid-cooled evaporation circuit 34 , wherein the air-cooled evaporation circuit 33 includes an air-cooled evaporator 331 , and the liquid-cooled evaporation circuit 34 includes a liquid-cooled evaporator 341 .

[0090] The air-cooled evaporator 331 is used to achieve heat exchange with the air-cooled heat source 2a, such as heat exchange with IT equipment in the data center 1000. For example, in some embodiments, the evaporator group 30 further includes a fan 35, and the fan 35 is used to blow air near the air-cooled evaporator 331 toward the air-cooled heat source 2a, thereby improving the heat exchange efficiency between the air-cooled evaporator 331 and the air-cooled heat source 2a.

[0091] The liquid-cooled evaporator 341 is used to achieve heat exchange with the liquid-cooled heat source 2b, such as heat exchange with the energy storage battery of the data center 1000. For example, in some embodiments, the cooling plate of the energy storage battery is connected to the liquid-cooled evaporator 341, and the cooling medium flowing in the cooling plate of the energy storage battery flows into the liquid-cooled evaporator 341 and performs heat exchange with the working medium flowing in the liquid-cooled evaporator 341 to achieve heat exchange.

[0092] In some embodiments, the air-cooled evaporator 331 and the liquid-cooled evaporator 341 are connected in parallel. Specifically, the input ends of the air-cooled evaporator 331 and the liquid-cooled evaporator 341 are directly connected to the output ends of the condenser 20, respectively, and the output ends of the air-cooled evaporator 331 and the liquid-cooled evaporator 341 are directly connected to the input ends of the compression-expansion integrated machine 10, respectively. In this embodiment, since the air-cooled evaporator 331 and the liquid-cooled evaporator 341 are connected in parallel, the temperature and pressure of the working fluid flowing out of the condenser 20 when flowing to the air-cooled evaporator 331 and the liquid-cooled evaporator 341 are the same, and the heat dissipation effect can be improved for the liquid-cooled heat source 2b with more serious heat generation.

[0093] In some embodiments, the air-cooled evaporator 331 and the liquid-cooled evaporator 341 are connected in series. Specifically, the input end of the air-cooled evaporator 331 is directly connected to the output end of the condenser 20, the output end of the air-cooled evaporator 331 is connected to the input end of the liquid-cooled evaporator 341, and the output end of the liquid-cooled evaporator 341 is connected to the input end of the compression-expansion machine 10. In this embodiment, since the air-cooled evaporator 331 and the liquid-cooled evaporator 341 are connected in series, the waste heat of the working fluid passing through the air-cooled evaporator 331 can be heated by the air-cooled heat source 2a, then flows through the liquid-cooled evaporator 341, and is heated again by the liquid-cooled heat source 2b, thereby increasing the temperature of the working fluid entering the compression-expansion machine 10, so as to improve the power generation efficiency of the compression-expansion machine 10. Such a design is suitable for application scenarios in which the heat of the heat source 2 is used to generate electricity when the ambient temperature is relatively low and the cooling demand for the heat source 2 is relatively small.

[0094] In some embodiments, the air-cooled evaporator 331 and the liquid-cooled evaporator 341 may be connected in parallel or in series.

[0095] Specifically, the air-cooled evaporation circuit 33 also includes an air-cooled pipeline 332 and an air-cooled control valve 333 and an air-cooled expansion valve 334 connected to the air-cooled pipeline 332. The air-cooled expansion valve 334 is connected to the input end of the air-cooled evaporator 331. The two ends of the air-cooled pipeline 332 are respectively connected to the output end and the input end of the air-cooled steam generator to form a circuit. The liquid-cooled evaporation circuit 34 also includes a liquid-cooled pipeline 342 and a liquid-cooled control valve 343 and a liquid-cooled expansion valve 344 connected to the liquid-cooled pipeline 342. The two ends of the liquid-cooled pipeline 342 are respectively connected to the output end and the input end of the liquid-cooled steam generator to form a circuit. The liquid-cooled expansion valve 344 is connected to the input end of the liquid-cooled evaporator 341. The air-cooled evaporation circuit 33 and the liquid-cooled evaporation circuit 34 are connected in series. The input end of the air-cooled evaporation circuit 33 is connected to the output end of the condenser 20, the output end of the air-cooled evaporation circuit 33 is connected to the input end of the liquid-cooled evaporation circuit 34, the output end of the liquid-cooled evaporation circuit 34 is connected to the compression-expansion integrated machine 10, and the evaporator group 30 also includes an air-liquid control valve 36 connected between the air-cooled evaporation circuit 33 and the liquid-cooled evaporation circuit 34. Specifically, the input end of the air-cooled evaporation circuit 33 is located between the air-cooled expansion valve 334 and the air-cooled control valve 333, the output end of the air-cooled evaporation circuit 33 is located between the air-cooled control valve 333 and the air-cooled evaporator 331, the input end of the liquid-cooled evaporation circuit 34 is located between the liquid-cooled expansion valve 344 and the liquid-cooled control valve 343, and the output end of the liquid-cooled evaporation circuit 34 is located between the liquid-cooled control valve 343 and the liquid-cooled evaporator 341.

[0096] In this embodiment, the series connection of the air-cooled evaporator 331 and the liquid-cooled evaporator 341 can be realized by closing the air-cooled control valve 333 and the liquid-cooled control valve 343. When the air-cooled control valve 333, the liquid-cooled control valve 343 and the air-liquid control valve 36 are all opened, the working fluid flowing out of the condenser 20 can flow to the compression-expansion integrated machine 10 through the air-cooled expansion valve 334, the air-cooled evaporator 331, the air-liquid control valve 36 and the liquid-cooled control valve 343 in sequence, and can also flow to the compression-expansion integrated machine 10 through the air-cooled control valve 333, the air-liquid control valve 36, the liquid-cooled expansion valve 344 and the liquid-cooled evaporator 341 in sequence. When the air-cooling control valve 333 and the air-liquid control valve 36 are both open, and the liquid-cooling control valve 343 is closed, the working fluid flowing out of the condenser 20 preferentially flows to the compression-expansion integrated machine 10 through the liquid-cooling evaporator 341. When the air-liquid control valve 36 and the air-liquid control valve 36 are both open, and the air-cooling control valve 333 is closed, the working fluid flowing out of the condenser 20 preferentially flows to the compression-expansion integrated machine 10 through the air-cooling evaporator 331. Through the air-cooling circuit and the liquid-cooling circuit in this embodiment, the air-cooling evaporator 331 and the liquid-cooling evaporator 341 can be connected in parallel or in series, and can be adapted to a variety of scenarios.

[0097] In some implementations, the output end of the liquid cooling circuit is connected to the third interface 53 so as to control the working mode of the temperature control system 3 through the multi-way valve 50 .

[0098] Reference Figure 7 In some embodiments, the temperature control system 3 further includes a plurality of liquid pump circuits 60, each of which includes a liquid pump 61, a liquid pump 61 pipeline, and a one-way valve 63 connected to the liquid pump 61 pipeline. The two ends of the liquid pump 61 pipeline are respectively connected to the output end and the input end of the liquid pump 61 to form a circuit. The plurality of liquid pump circuits 60 are connected in series, and the temperature control system 3 further includes a liquid pump control valve 64 connected between two adjacent liquid pump circuits 60. Each throttling pipeline 41 is connected in series with at least one liquid pump circuit 60, and at least one liquid pump circuit 60 is connected in series between the input end of the evaporator group 30 and the output end of the condenser 20. In this embodiment, the liquid pump circuit 60 can improve the circulation rate of the working medium in the temperature control system 3 when the compression-expansion machine 10 is not used for compressing gas, and can improve the power generation efficiency of the temperature control system 3 when the compression-expansion machine 10 is used for expansion.

[0099] In some embodiments, the plurality of liquid pump circuits 60 include a first liquid pump circuit 601 and a second liquid pump circuit 602, the input end of the first liquid pump circuit 601 being located between the input end of the liquid pump 61 and the input end of the one-way valve 63, the output end of the first liquid pump circuit 601 being located between the output end of the liquid pump 61 and the output end of the one-way valve 63, the input end of the second liquid pump circuit 602 being located between the input end of the liquid pump 61 and the input end of the one-way valve 63, and the output end of the second liquid pump circuit 602 being located between the output end of the liquid pump 61 and the output end of the one-way valve 63.

[0100] For ease of description, each loop consisting of the compression-expansion integrated machine 10, the condenser 20, the main pipeline and the throttling pipeline 41 is set as a throttling loop. The input end of the first liquid pump loop 601 is connected to the output end of the condenser 20, the output end of the first liquid pump loop 601 is respectively connected to the input end of the throttling loop and the second liquid pump loop 602, and the output end of the second liquid pump loop 602 is connected to the input end of the air-cooled evaporation loop 33.

[0101] In this embodiment, when the liquid pump 61 in the first liquid pump circuit 601 is turned on and the liquid pump control valve 64 is closed, the working fluid flowing out of the condenser 20 preferentially flows from the liquid pump 61 and the throttling pipeline 41 in the first liquid pump circuit 601 directly to the compression expansion machine 10, so as to increase the flow rate of the working fluid in the throttling circuit and improve the efficiency of secondary power generation or heat supply. When the liquid pump 61 in the second liquid pump circuit 602 is turned off and the liquid pump control valve 64 is opened, the working fluid flowing out of the condenser 20 preferentially flows from the liquid pump 61 and the evaporator group 30 in the second liquid pump circuit 602 to the compression expansion machine 10, so as to increase the flow rate of the working fluid in the temperature control circuit. When the liquid pump 61 of the first liquid pump circuit 601 and the liquid pump 61 of the second liquid pump circuit 602 are both turned on, the working fluid flowing out of the condenser 20 can flow in the throttling circuit and the temperature control circuit, which can increase the flow rate of the working fluid in the throttling circuit and the temperature control circuit.

[0102] For the convenience of description, the liquid pump 61 in the first liquid pump circuit 601 is set as the first liquid pump 611, the one-way valve 63 in the first liquid pump circuit 601 is set as the first one-way valve 631, the liquid pump 61 in the second liquid pump circuit 602 is set as the second liquid pump 612, and the one-way valve 63 in the second liquid pump circuit 602 is set as the second one-way valve 632.

[0103] Reference Figure 7 The temperature control system 3 in the embodiment of the present application includes a cooling mode, a heating mode and a power generation mode. The cooling mode includes a mechanical cooling mode, a natural cooling mode, etc., and the power generation mode includes an air-cooled power generation mode and a liquid-cooled power generation mode.

[0104] Fig. 8A for Figure 7 Schematic diagram of air cooling of the temperature control system 3 in the embodiment in the mechanical cooling mode.

[0105] Reference Figure 7 and Fig. 8A The temperature control system 3 in this embodiment is in the air-cooling mode in the mechanical refrigeration mode. While performing air-cooling, it can also provide heat through the condenser 20, converting the heat absorbed by the air-cooled evaporator 331 into heat that the condenser 20 provides to the outside.

[0106] Specifically, the air-cooling refrigeration and air-cooling heating modes are realized by opening and closing the various components in the temperature control system 3 as shown in Table 1 below.

[0107] Table 1

[0108]

[0109] Based on Table 1, when the temperature control system 3 in this embodiment is in the air-cooled refrigeration and air-cooled heating modes, most of the working fluid flowing out of the condenser 20 passes through the first one-way valve 631, the second one-way valve 632, the air-cooled expansion valve 334, the air-cooled evaporator 331, the air-liquid control valve 36, the liquid-cooled control valve 343, the third interface 53, the fourth interface 54, and returns to the low-pressure port 12, and then flows out through the high-pressure port 11 and flows to the input end of the condenser 20 through the second interface 52 and the first interface 51, thus forming a circulation loop. In this process, the working fluid flowing through the air-cooled evaporator 331 can achieve heat exchange with the air-cooled heat source 2a to achieve cooling of the air-cooled heat source 2a, and the working fluid flowing through the air-cooled evaporator 331 absorbs the heat of the air-cooled heat source 2a, and can provide heat to the external heating device through the condenser 20. In this way, air-cooled refrigeration and air-cooled heating can be achieved.

[0110] The air-cooled refrigeration and air-cooled heating modes in this embodiment are mainly used in scenarios where the ambient temperature is high and the liquid-cooled heat source 2b is not working or is partially working and the heat generation is not large.

[0111] Figure 8B for Figure 7 Schematic diagram of liquid cooling of the temperature control system 3 in the embodiment in the mechanical cooling mode.

[0112] Reference Figure 7 and Figure 8B In this embodiment, the temperature control system 3 is in the liquid cooling mode in the mechanical cooling mode. While performing liquid cooling, the condenser 20 can also provide heat, converting the heat absorbed by the liquid cooling evaporator 341 into heat for the condenser 20 to provide heat to the outside. Specifically, by opening and closing the various components in the temperature control system 3 as shown in Table 2 below, the liquid cooling and liquid cooling heating modes are realized.

[0113] Table 2

[0114]

[0115] Based on Table 2, when the temperature control system 3 in this embodiment is in the liquid cooling and liquid cooling heating mode, most of the working fluid flowing out of the condenser 20 passes through the first one-way valve 631, the second one-way valve 632, the air-liquid control valve 36, the air-cooling control valve 333, the air-liquid control valve 36, the liquid cooling expansion valve 344, the liquid cooling evaporator 341, the third interface 53, the fourth interface 54, and returns to the low-pressure port 12, and then flows out through the high-pressure port 11 and flows to the input end of the condenser 20 through the second interface 52 and the first interface 51, thus forming a circulation loop. In this process, the working fluid flowing through the liquid cooling evaporator 341 can achieve heat exchange with the liquid cooling heat source 2b to achieve cooling of the liquid cooling heat source 2b, and the working fluid flowing through the liquid cooling evaporator 341 absorbs the heat of the liquid cooling heat source 2b, and can provide heat to the external heating device through the condenser 20. In this way, liquid cooling and liquid cooling heating can be achieved. The liquid cooling refrigeration and liquid cooling heating modes in this embodiment are mainly used in scenarios where the ambient temperature is high and the air-cooled heat source 2a is not working or is partially working and the heat generation is not large.

[0116] Figure 8C for Figure 7 The temperature control system 3 in the embodiment is a schematic diagram of air cooling and liquid cooling combined with refrigeration in the mechanical refrigeration mode.

[0117] Reference Figure 7 and Figure 8C The temperature control system 3 in this embodiment is in a mode of combined cooling of air and liquid in the mechanical cooling mode. While performing air and liquid cooling, heat can also be supplied through the condenser 20, converting the heat absorbed by the liquid-cooled evaporator 341 into heat for the condenser 20 to supply heat to the outside.

[0118] Specifically, by opening and closing the various components in the temperature control system 3 as shown in Table 3 below, a mode of joint cooling by air cooling and liquid cooling and joint heating by air cooling and liquid cooling is realized.

[0119] Table 3

[0120]

[0121] Based on Table 3, when the temperature control system 3 in this embodiment is in the mode of air-cooling and liquid-cooling co-refrigeration and air-cooling and liquid-cooling co-heating, the working fluid flowing out of the condenser 20 passes through the first one-way valve 631, the second one-way valve 632, the air-cooled evaporator 331, the liquid-cooled evaporator 341, the third interface 53, the fourth interface 54, and returns to the low-pressure port 12 in sequence, and then flows out through the high-pressure port 11 and flows to the input end of the condenser 20 through the second interface 52 and the first interface 51, so as to form a circulation loop. In this process, the working fluid flowing through the air-cooled evaporator 331 and the liquid-cooled evaporator 341 can realize heat exchange with the air-cooled heat source 2a and the liquid-cooled heat source 2b respectively, so as to realize cooling of the air-cooled heat source 2a and the liquid-cooled heat source 2b, and the working fluid flowing through the air-cooled evaporator 331 and the liquid-cooled evaporator 341 absorbs the heat of the air-cooled heat source 2a and the liquid-cooled heat source 2b, and can supply heat to the external heating device through the condenser 20. In this way, air cooling and liquid cooling together for cooling and air cooling and liquid cooling together for heating can be achieved.

[0122] The air-cooling and liquid-cooling combined cooling mode and the air-cooling and liquid-cooling combined heating mode in this embodiment are mainly used in scenarios with relatively high ambient temperatures.

[0123] In some implementations, secondary heating can also be performed through the temperature control system 3 in this embodiment. On the basis of Table 3, the liquid pump control valve 64 is opened to connect the throttling line 41 with the output end of the condenser 20. At this time, the throttling circuit is flowing, and the higher temperature working fluid flowing out from the output end of the condenser 20 can directly pass through the throttling line 41 to flow to the compression and expansion machine 10 and then flow to the condenser 20 to realize secondary heating through the condenser 20, so as to effectively improve the thermal energy utilization efficiency.

[0124] Fig. 9 for Figure 7 The temperature control system 3 in the embodiment is in a schematic diagram of natural cooling, at which time the compression-expansion integrated machine 10 does not perform compression operation;

[0125] Reference Figure 7 and Fig. 9 , the temperature control system 3 in this embodiment is in natural cooling mode.

[0126] Specifically, the natural cooling mode is achieved by opening and closing the various components in the temperature control system 3 as shown in Table 4 below.

[0127] Table 4

[0128]

[0129] Based on Table 4, when the temperature control system 3 in this embodiment is in the natural cooling mode, the working fluid flowing out of the condenser 20 passes through the first liquid pump 611, the second liquid pump 612, the air-cooled evaporator 331, the liquid-cooled evaporator 341, the third interface 53, and the first interface 51 in sequence and flows to the input end of the condenser 20, thus forming a circulation loop. In this process, the working fluid flowing through the air-cooled evaporator 331 and the liquid-cooled evaporator 341 can respectively exchange heat with the air-cooled heat source 2a and the liquid-cooled heat source 2b to achieve refrigeration of the air-cooled heat source 2a and the liquid-cooled heat source 2b. Since the compression and expansion integrated machine 10 does not need to participate in this process, the heat dissipation can be achieved through the temperature of the natural environment, so that the natural cooling mode can be used when the ambient temperature is low, which can effectively save energy.

[0130] It is understandable that, in some embodiments, only one of the first liquid pump 611 and the second liquid pump 612 may be used, or both the first liquid pump 611 and the second liquid pump 612 may not be used.

[0131] Fig. 10A for Figure 7 The temperature control system 3 in the embodiment is a schematic diagram of air-cooled power generation in the power generation mode, and the compression-expansion integrated machine 10 is performing an expansion operation.

[0132] Reference Figure 7 and Fig. 10A , the temperature control system 3 in this embodiment is in the air-cooled power generation mode in the power generation mode. Specifically, the air-cooled power generation mode is realized by opening and closing the various components in the temperature control system 3 as shown in Table 5 below.

[0133] Table 5

[0134]

[0135] Based on Table 5, when the temperature control system 3 in this embodiment is in the air-cooled power generation mode, most of the working fluid flowing out of the condenser 20 passes through the first liquid pump 611, the second liquid pump 612, the air-cooled expansion valve 334, the air-cooled evaporator 331, the air-liquid control valve 36, the liquid-cooled control valve 343, the third interface 53, the second interface 52, and returns to the high-pressure port 11, and then flows out through the low-pressure port 12 and flows to the input end of the condenser 20 through the fourth interface 54 and the first interface 51, so as to form a circulation loop. In this process, the working fluid flowing through the air-cooled evaporator 331 can achieve heat exchange with the air-cooled heat source 2a to achieve refrigeration of the air-cooled heat source 2a, and the working fluid flowing through the air-cooled evaporator 331 absorbs the heat of the air-cooled heat source 2a, and the temperature rises, and then when passing through the compression-expansion integrated machine 10, it is expanded by the compression-expansion integrated machine 10 to drive the generator 70 to rotate to achieve power generation.

[0136] The air-cooled power generation mode in this embodiment is mainly used in scenarios where the ambient temperature is low and the liquid-cooled heat source 2b is not working or is partially working and the heat generation is not large.

[0137] It is understandable that in some embodiments, only one of the first liquid pump 611 and the second liquid pump 612 may be used.

[0138] Fig. 10B for Figure 7 The temperature control system 3 in the embodiment is a schematic diagram of liquid cooling power generation in the power generation mode, and the compression and expansion integrated machine 10 is performing an expansion operation.

[0139] Reference Figure 7 and Fig. 10B , the temperature control system 3 in this embodiment is in the liquid cooling power generation mode in the power generation mode. Specifically, the liquid cooling power generation mode is realized by opening and closing the various components in the temperature control system 3 as shown in Table 6 below.

[0140] Table 6

[0141]

[0142] Based on Table 6, when the temperature control system 3 in this embodiment is in the liquid-cooled power generation mode, most of the working fluid flowing out of the condenser 20 passes through the first liquid pump 611, the second liquid pump 612, the air-cooled control valve 333, the air-liquid control valve 36, the liquid-cooled expansion valve 344, the liquid-cooled evaporator 341, the third interface 53, the second interface 52, and returns to the high-pressure port 11, and then flows out through the low-pressure port 12 and flows to the input end of the condenser 20 through the fourth interface 54 and the first interface 51, so as to form a circulation loop. In this process, the working fluid flowing through the liquid-cooled evaporator 341 can achieve heat exchange with the liquid-cooled heat source 2b to achieve refrigeration of the liquid-cooled heat source 2b, and the working fluid flowing through the liquid-cooled evaporator 341 absorbs the heat of the liquid-cooled heat source 2b, and the temperature rises. Then, when passing through the compression-expansion integrated machine 10, it is expanded by the compression-expansion integrated machine 10 to drive the generator 70 to rotate to achieve power generation.

[0143] The liquid cooling power generation mode in this embodiment is mainly used in the scenario where the ambient temperature is low and the air cooling heat source 2a is not working or is partially working and the heat generation is not large.

[0144] It is understandable that in some embodiments, only one of the first liquid pump 611 and the second liquid pump 612 may be used.

[0145] It can be understood that in some embodiments, based on Table 6, the second liquid pump 612 is turned off so that the output end of the condenser 20 is connected to the compression and expansion machine 10 through the throttling pipe 41. When the heat generated by the liquid-cooled heat source 2b is large, the temperature of the working fluid flowing out of the liquid-cooled evaporator 341 is still high after passing through the condenser 20 for the first time. At this time, it flows directly to the compression and expansion machine 10 through the throttling circuit. The heat energy can be used by the compression and expansion machine 10 for secondary power generation, which can effectively improve the thermal energy utilization efficiency.

[0146] Fig. 10C for Figure 7 The temperature control system 3 in the embodiment is in a schematic diagram of wind-cooled power generation and liquid-cooled power generation in the power generation mode, and the compression-expansion integrated machine 10 performs expansion operation.

[0147] Reference Figure 7 and Fig. 10C In this embodiment, the temperature control system 3 is in a power generation mode in which air cooling and liquid cooling are used together to generate power.

[0148] Specifically, by opening and closing the various components in the temperature control system 3 as shown in Table 7 below, a mode of co-generation of power by air cooling and liquid cooling is achieved.

[0149] Table 7

[0150]

[0151] Based on Table 7, when the temperature control system 3 in this embodiment is in the air-cooled and liquid-cooled co-generation mode, the working fluid with a temperature exceeding a preset threshold flowing out of the condenser 20 passes through the first liquid pump 611 (the second liquid pump 612 is closed at this time), the throttling line 41, the medium-pressure port 13 and the low-pressure port 12 of the compression-expansion machine 10, the fourth opening, and the first opening to return to the condenser 20. In this process, the working fluid with a higher temperature can drive the generator 70 to rotate through the expansion operation of the compression-expansion machine 10 to achieve power generation. When the working fluid flowing back to the condenser 20 through the throttling line 41 is cooled again by the condenser 20, the working fluid with the outflow temperature lower than the preset threshold flows through the first liquid pump 611, the second liquid pump 612 (the second liquid pump 612 is turned on at this time), the air-cooled evaporator 331, the liquid-cooled evaporator 341, the third interface 53, and the second interface 52 in sequence to the high-pressure port 11 and the low-pressure port 12 of the compression-expansion machine 10 and to the condenser 20. In this process, the working fluid expands during the process of flowing from the high-pressure port 11 of the compression-expansion machine 10 to the low-pressure port 12, which can drive the generator 70 to rotate to generate electricity. The temperature control system 3 in this embodiment can realize secondary or even multiple power generation, which can effectively improve the efficiency of utilizing the heat energy absorbed by the air-cooled evaporator 331 and the liquid-cooled evaporator 341.

[0152] It can be understood that if the outflow temperature from the condenser 20 is always lower than the preset threshold, the second liquid pump 612 can be kept turned on so that the working fluid flowing out of the condenser 20 can flow through the temperature control circuit where the air-cooled evaporator 331 and the liquid-cooled evaporator 341 are located, which is single-stage power generation.

[0153] The liquid cooling power generation mode in this embodiment is mainly used in scenarios with low ambient temperature.

[0154] It is understandable that in order to improve the control efficiency and stability of the working fluid flowing through the throttling circuit, in some embodiments, a control valve may also be connected to the throttling line 41 to directly control the on-off of the flow of the throttling line 41 .

[0155] Fig.11 A schematic diagram of the structure of another temperature control system 3 provided in the embodiment of the present application. Figure 7 , Fig.11 The number of ports of the integrated compression and expansion machine 10 is different, and the number of the integrated compression and expansion machines 10 is different.

[0156] Reference Fig.11 The temperature control system 3 in the embodiment of the present application includes a plurality of compression expansion machines 10, a multi-way valve 50, a condenser 20, a plurality of liquid pump circuits 60, an air-cooled evaporation circuit 33, a liquid-cooled evaporation circuit 34, etc., wherein the multi-way valve 50, the condenser 20, the plurality of liquid pump circuits 60, the air-cooled evaporation circuit 33, the liquid-cooled evaporation circuit 34, etc. can all be referred to Figure 7 The multi-way valve 50, condenser 20, multiple liquid pump circuits 60, air-cooled evaporation circuit 33, liquid-cooled evaporation circuit 34, etc. in the embodiment are not described in detail here. Figure 7 The main difference between the embodiments is that the multiple compression-expansion machines 10 in the embodiment all include two ports, a high-pressure port 11 and a low-pressure port 12, a throttling line 41 is connected to one of the high-pressure port 11 and the low-pressure port 12 of one compression-expansion machine 10, the other of the high-pressure port 11 and the low-pressure port 12 of one compression-expansion machine 10 is connected to one of the high-pressure port 11 and the low-pressure port 12 of another compression-expansion machine 10, and the other of the high-pressure port 11 and the low-pressure port 12 of another compression-expansion machine 10 is connected to the input end of the condenser 20. In the embodiment, two compression-expansion machines 10 with two ports can replace one compression-expansion machine 10 with three ports in the foregoing text, and three compression-expansion machines 10 with two ports can replace one compression-expansion machine 10 with four ports in the foregoing text, or replace one compression-expansion machine 10 with three ports in the foregoing text and one compression-expansion machine 10 with two ports in the embodiment. The working principle of the temperature control system 3 in this embodiment can be referred to the previous embodiments, and will not be described again here.

[0157] It can be understood that the temperature control system 3 in the present application can use a compression and expansion machine 10 with more than two ports, or only use a compression and expansion machine 10 with two ports, or a compression and expansion machine 10 with more than two ports can be used in combination with a compression and expansion machine 10 with only two ports.

[0158] The present application also provides an energy storage device, including a battery module and the above temperature control system 3, wherein the evaporator 31 is used to connect to the battery module and to exchange heat with the battery module. The heat generated by the battery module can be used to generate electricity through the compression-expansion integrated machine 10, or to provide heat through the condenser 20, and the heat generated by the battery module of the energy storage device can be used twice or multiple times, which can effectively improve the energy utilization efficiency.

[0159] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A temperature control system, characterized in that: The temperature control system includes a compression-expansion machine, a condenser, an evaporator group, a main pipeline and at least one throttling pipeline. The compression-expansion machine is used to compress or expand a gaseous working medium. The output end of the compression-expansion machine is connected to the input end of the condenser, the output end of the condenser is connected to one end of the main pipeline, the other end of the main pipeline is connected to one end of the at least one throttling pipeline, and the other end of the at least one throttling pipeline is connected to the input end of the compression-expansion machine; the input end of the evaporator group is connected to the other end of the main pipeline, and the output end of the evaporator group is connected to the input end of the compression-expansion machine.

2. The temperature control system according to claim 1, characterized in that: The integrated compression and expansion machine includes a high-pressure port, at least one medium-pressure port and a low-pressure port. The at least one medium-pressure port is directly connected to the other end of the at least one throttling pipeline. When the integrated compression and expansion machine is used to compress a gaseous working medium, the input end of the condenser is connected to the high-pressure port, and the output end of the evaporator group is connected to the low-pressure port; when the integrated compression and expansion machine is used to expand a gaseous working medium, the input end of the condenser is connected to the low-pressure port, and the output end of the evaporator group is connected to the high-pressure port.

3. The temperature control system according to claim 2, characterized in that: The temperature control system further comprises a multi-way valve, the input end of the condenser, the output end of the evaporator group, the high-pressure port and the low-pressure port are all connected to the multi-way valve, and the multi-way valve is used to convert the following two connection relationships: One of the connection relationships is that the input end of the condenser is connected to the high-pressure port, and the output end of the evaporator group is connected to the low-pressure port; The other connection relationship is that the input end of the condenser is connected to the low-pressure port, and the output end of the evaporator group is connected to the high-pressure port.

4. The temperature control system according to claim 3, characterized in that: The multi-way valve comprises a first interface, a second interface, a third interface and a fourth interface, the input end of the condenser is connected to the first interface, the output end of the evaporator group is connected to the third interface, the second interface is connected to the high-pressure port, and the fourth interface is connected to the low-pressure port; When the integrated compression-expansion machine is used to compress a gaseous working medium, the first interface is connected to the second interface, and the third interface is connected to the fourth interface; When the integrated compression-expansion machine is used to expand a gaseous working medium, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface.

5. The temperature control system according to claim 4, characterized in that: When the first interface is connected to the third interface and the second interface is connected to the fourth interface, the output end of the evaporator group is directly connected to the input end of the condenser, so that the working fluid flowing out of the output end of the evaporator group bypasses the compression and expansion machine and directly enters the condenser.

6. The temperature control system according to any one of claims 2 to 5, characterized in that: The number of the medium-pressure port and the throttling pipeline is one, one end of the throttling pipeline is connected to the main pipeline, and the other end of the throttling pipeline is directly connected to the medium-pressure port; the temperature control system also includes a throttling valve, which is arranged on the throttling pipeline.

7. The temperature control system according to any one of claims 2 to 5, characterized in that: There are multiple medium-pressure ports and throttling pipelines, one end of each of the multiple throttling pipelines is connected to the main pipeline, and the other end of each of the multiple throttling pipelines is connected to the multiple medium-pressure ports one by one, and the multiple throttling pipelines are arranged in parallel; the temperature control system also includes multiple throttling valves, and each of the throttling pipelines is connected to a throttling valve.

8. The temperature control system according to any one of claims 2 to 7, characterized in that: The evaporator group includes an air-cooled evaporation circuit and a liquid-cooled evaporation circuit, the air-cooled evaporation circuit includes an air-cooled evaporator, an air-cooled pipeline, and an air-cooled control valve and an air-cooled expansion valve connected to the air-cooled pipeline, the two ends of the air-cooled pipeline are respectively connected to the output end and the input end of the air-cooled steam generator to form a loop, and the air-cooled expansion valve is connected to the input end of the air-cooled evaporator; The liquid-cooled evaporation circuit comprises a liquid-cooled evaporator, a liquid-cooled pipeline, and a liquid-cooled control valve and a liquid-cooled expansion valve connected to the liquid-cooled pipeline. The two ends of the liquid-cooled pipeline are respectively connected to the output end and the input end of the liquid-cooled evaporator to form a circuit. The liquid-cooled expansion valve is connected to the input end of the liquid-cooled evaporator. The air-cooled evaporation circuit and the liquid-cooled evaporation circuit are connected in series. The input end of the air-cooled evaporation circuit is connected to the output end of the condenser, the output end of the air-cooled evaporation circuit is connected to the input end of the liquid-cooled evaporation circuit, and the output end of the liquid-cooled evaporation circuit is connected to the high-pressure port or the low-pressure port of the compression-expansion integrated machine; The evaporator group also includes an air-liquid control valve connected between the air-cooled evaporation circuit and the liquid-cooled evaporation circuit.

9. The temperature control system according to any one of claims 2 to 8, characterized in that: The temperature control system further includes a plurality of liquid pump circuits, each of which includes a liquid pump, a liquid pump pipeline, and a one-way valve connected to the liquid pump pipeline, the two ends of the liquid pump pipeline are respectively connected to the output end and the input end of the liquid pump to form a circuit, and the plurality of liquid pump circuits are connected in series; The temperature control system further includes a liquid pump control valve connected between two adjacent liquid pump circuits; Each of the throttling pipelines is connected in series with at least one of the liquid pump circuits, and at least one of the liquid pump circuits is connected in series between the input end of the evaporator group and the output end of the condenser.

10. The temperature control system according to claim 1, characterized in that: There are multiple compression and expansion machines, and each of the multiple compression and expansion machines includes two ports, a high-pressure port and a low-pressure port. The other end of the throttling pipeline is connected to one of the high-pressure port and the low-pressure port of the one compression and expansion machine, and the other of the high-pressure port and the low-pressure port of the one compression and expansion machine is connected to one of the high-pressure port and the low-pressure port of another compression and expansion machine, and the other of the high-pressure port and the low-pressure port of the other compression and expansion machine is connected to the input end of the condenser.

11. A data center, characterized in that: It comprises a heat source and a temperature control system as described in any one of claims 1 to 10, wherein the evaporator is used to be connected to the heat source for heat exchange with the heat source.

12. An energy storage device, characterized in that: It comprises a battery module and a temperature control system as described in any one of claims 1 to 10 above, wherein the evaporator is used to be connected to the battery module for heat exchange with the battery module.

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