Heat exchange piece testing device, testing system and testing method

Abstract

The invention provides a heat exchange piece testing device, a testing system and a testing method. The heat exchange piece testing device comprises a compressor, a condenser, a subcooler, a first temperature and pressure sensor, a first expansion valve, a second temperature and pressure sensor and a second expansion valve, a first fan is arranged on one side of the condenser, a second fan is arranged on one side of the subcooler, and an inlet of the condenser is communicated with an outlet of the compressor. A first flow path is arranged between an outlet of the condenser and a first port of the heat exchange piece, a second flow path is arranged between a second port of the heat exchange piece and an inlet of the compressor, and in a refrigeration mode, the first flow path sequentially passes through the subcooler, the first temperature pressure sensor and the first expansion valve; the second flow path sequentially passes through a second temperature pressure sensor and a second expansion valve, the rotating speed of the first fan is adjustable to control the condensing pressure, the rotating speed of the second fan is adjustable to control the degree of supercooling, the opening degree of the first expansion valve is adjustable to control the degree of superheat, and the opening degree of the second expansion valve is adjustable to control the evaporation pressure.

Description

Technical Field

[0001] The present application relates to the technical field of power battery heat exchange testing, and more specifically, to a heat exchange component testing device, including a testing system for the heat exchange component testing device and a testing method suitable for the heat exchange component testing device. Background Art

[0002] In the related technology, the direct cooling and direct heating test bench can test the heat exchange performance of the cooling and direct heating plate of the power battery. The power battery has a variety of operating conditions, and the heat exchange of the direct cooling and direct heating plate can have heat exchange conditions corresponding to a variety of operating conditions. However, the existing test bench cannot adjust the evaporation pressure, condensation pressure, supercooling and superheating according to different refrigeration cycle boundary conditions, making it difficult to compare the heat exchange capacity of different direct cooling and direct heating plates. Summary of the invention

[0003] One purpose of the present application is to provide a new technical solution for a heat exchange component testing device, which can at least solve the problem that the evaporation pressure, condensation pressure, subcooling and superheating cannot be adjusted in the prior art.

[0004] Another object of the present application is to provide a testing system, comprising the above-mentioned heat exchange component testing device.

[0005] Another object of the present application is to provide a testing method according to the above-mentioned heat exchange component testing device.

[0006] According to a first aspect of the present application, a heat exchange component testing device is provided for testing the heat exchange performance of the heat exchange component, the heat exchange component testing device having a refrigeration mode, the heat exchange component testing device comprising: a compressor, a condenser, a subcooler, a first temperature and pressure sensor, a first expansion valve, a second temperature and pressure sensor, and a second expansion valve, a first fan is provided on one side of the condenser, a second fan is provided on one side of the subcooler, an inlet of the condenser is connected to an outlet of the compressor, a first flow path is provided between the outlet of the condenser and a first port of the heat exchange component, a second flow path is provided between the second port of the heat exchange component and the inlet of the compressor, and In the refrigeration mode, the first flow path passes through the subcooler, the first temperature and pressure sensor and the first expansion valve in sequence, and the second flow path passes through the second temperature and pressure sensor and the second expansion valve in sequence. The first temperature and pressure sensor is used to obtain the condensing pressure and subcooling degree of the refrigerant flowing into the heat exchange element, and the second temperature and pressure sensor is used to obtain the evaporating pressure and superheat degree of the refrigerant flowing out of the heat exchange element. The speed of the first fan is adjustable to control the condensing pressure, the speed of the second fan is adjustable to control the subcooling degree, the opening degree of the first expansion valve is adjustable to control the superheat degree, and the opening degree of the second expansion valve is adjustable to control the evaporating pressure.

[0007] Optionally, the heat exchange component testing device has a heating mode, a third flow path is provided between the outlet of the condenser and the second port of the heat exchange component, a fourth flow path is provided between the first port of the heat exchange component and the inlet of the compressor, and the heat exchange component testing device also includes: a third temperature and pressure sensor, a third expansion valve and a heat exchanger. In the heating mode, the third flow path passes through the second temperature and pressure sensor, and the fourth flow path passes through the third temperature and pressure sensor, the third expansion valve and the heat exchanger in sequence. The second temperature and pressure sensor is used to obtain the condensing pressure and superheat of the refrigerant flowing into the heat exchange component, and the third temperature and pressure sensor is used to obtain the subcooling of the refrigerant flowing out of the heat exchange component. The speed of the first fan is adjustable to control the condensing pressure and superheat, and the opening of the third expansion valve is adjustable to control the subcooling.

[0008] Optionally, the heat exchange component testing device also includes: a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a sixth solenoid valve and a seventh solenoid valve to control the heat exchange component testing device to switch between the cooling mode and the heating mode, the first flow path passes through the subcooler, the first solenoid valve, the second solenoid valve, the first temperature and pressure sensor, the first expansion valve, and the third temperature and pressure sensor in sequence, the second flow path passes through the second temperature and pressure sensor, the second expansion valve and the third solenoid valve in sequence, the third flow path passes through the fourth solenoid valve, the fifth solenoid valve, the second temperature and pressure sensor in sequence, and the fourth flow path passes through the third temperature and pressure sensor, the sixth solenoid valve, the seventh solenoid valve, the third expansion valve and the heat exchanger in sequence.

[0009] Optionally, a fifth flow path is provided between the outlet of the condenser and the inlet of the compressor, and the heat exchange component testing device further includes: an eighth solenoid valve and a fourth expansion valve, and the fifth flow path passes through the subcooler, the eighth solenoid valve, the fourth expansion valve and the heat exchanger in sequence.

[0010] Optionally, a flow meter is further included, and the first flow path and the fourth flow path flow through the flow meter respectively, and the flow meter is used to measure the flow rate of the refrigerant after condensation.

[0011] Optionally, the heat exchanger has a first channel and a second channel, and the refrigerant in the first channel and the refrigerant in the second channel exchange heat in the heat exchanger, and the first channel is connected to the fourth flow path. The heat exchange component testing device also includes a pump body and a heater, and the pump body, the heater and the second channel are connected end to end to form a heating circuit.

[0012] Optionally, the refrigerant in the heating circuit is liquid, and the heater is a liquid heater.

[0013] Optionally, the heat exchange component testing device further comprises: a liquid storage tank, wherein the inlet of the liquid storage tank is connected to the outlet of the condenser, and the outlet of the liquid storage tank is connected to the inlet of the subcooler.

[0014] Optionally, the heat exchanger testing device also includes: a ninth solenoid valve, which is connected between the first expansion valve and the heat exchanger; a tenth solenoid valve, which is connected between the second temperature and pressure sensor and the second expansion valve; a first one-way valve, whose first port is connected to the first port of the heat exchanger; and a vacuum pump, which is connected to the second port of the first one-way valve to evacuate the heat exchanger.

[0015] Optionally, the heat exchange component testing device also includes: a filling machine, the filling machine having a first filling port and a second filling port, the first filling port is connected to the inlet of the liquid storage tank, and the second filling port is connected to the inlet of the heat exchanger; a second one-way valve, the second one-way valve is connected between the first filling port and the inlet of the liquid storage tank to allow the refrigerant to flow unidirectionally to the liquid storage tank; and a third one-way valve, the third one-way valve is connected between the second filling port and the inlet of the heat exchanger to allow the refrigerant to flow unidirectionally to the heat exchanger.

[0016] Optionally, the heat exchange component testing device also includes: an oil-gas separator, the inlet of the oil-gas separator is connected to the outlet of the compressor, and the outlet of the oil-gas separator is connected to the inlet of the condenser; a gas-liquid separator, the inlet of the gas-liquid separator is connected to the outlet of the second expansion valve and the outlet of the heat exchanger, and the outlet of the gas-liquid separator is connected to the inlet of the compressor.

[0017] According to a second aspect of the present application, a testing system is provided, comprising the heat exchange component testing device described in any one of the above embodiments.

[0018] According to a third aspect of the present application, a testing method according to the above-mentioned heat exchange component testing device is provided, comprising the following steps:

[0019] Connecting the heat exchange element to be tested between the first expansion valve and the second temperature and pressure sensor;

[0020] Starting the compressor to allow the refrigerant to flow into the heat exchange element through the first flow path, and the heat exchange element exchanges heat with the heat exchanged element;

[0021] The speed of the first fan is adjusted so that the condensing pressure reaches a preset value, the speed of the second fan is adjusted so that the subcooling degree reaches a preset value, the opening of the second expansion valve is adjusted so that the evaporation pressure reaches a preset value, and the opening of the first expansion valve is adjusted so that the superheat degree reaches a preset value.

[0022] According to the heat exchange component testing device of the present application, a subcooler is arranged at the outlet end of the condenser, and the subcooling degree of the refrigerant entering the heat exchange component can be adjusted in the refrigeration mode. The condensing pressure can be controlled by the speed of the first fan on one side of the condenser, the opening of the first expansion valve can control the superheat, and the second expansion valve can control the evaporation pressure. Therefore, in the process of testing the refrigeration of the heat exchange component, the speed of the first fan, the speed of the second fan, the opening of the first expansion valve and the opening of the second expansion valve can be adjusted according to different refrigeration cycle boundary conditions to adjust the condensing pressure, subcooling degree, superheat degree and evaporation pressure, so as to compare the heat exchange capacity of different cold plates under different conditions, meet various testing needs, and improve the application scope of the testing device.

[0023] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0025] Figure 1 is a structural schematic diagram of a heat exchange component testing device according to an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of a heat exchange component testing device in a cooling mode according to an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of a heat exchange component testing device in a heating mode according to an embodiment of the present application;

[0028] Figure 4 is a schematic diagram of a heat exchange component testing device in a recovery mode according to an embodiment of the present application;

[0029] Figure 5 It is a schematic diagram of a heat exchange component testing device in a filling mode according to an embodiment of the present application.

[0030] Reference numerals

[0031] Compressor 1; fourth temperature and pressure sensor 2; oil-gas separator 3; condenser 4; fifth temperature and pressure sensor 5; liquid storage tank 6; sight glass 7; subcooler 8; eighth solenoid valve 9; fourth expansion valve 10; first solenoid valve 11; third expansion valve 12; seventh solenoid valve 13; flow meter 14; second solenoid valve 15; first temperature and pressure sensor 16; first expansion valve 17; sixth solenoid valve 18; ninth solenoid valve 19; third temperature and pressure sensor 20; second temperature and pressure Sensor 21; tenth solenoid valve 22; second expansion valve 23; third solenoid valve 24; fifth solenoid valve 25; heat exchanger 26; heater 27; pump body 28; fourth solenoid valve 29; gas-liquid separator 30; sixth temperature and pressure sensor 31; heat exchange element 32; vacuum gauge 33; first non-return valve 34; vacuum pump 35; filling machine 36; second non-return valve 37; third non-return valve 38; first fan 41; second fan 81; first channel 261; second channel 262. DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] The following first describes in detail the heat exchange component testing device according to the embodiment of the present application with reference to the accompanying drawings.

[0038] like Figures 1 to 5 As shown, the heat exchange component testing device according to the embodiment of the present application includes: a compressor 1, a condenser 4, a subcooler 8, a first temperature and pressure sensor 16, a first expansion valve 17, a second temperature and pressure sensor 21 and a second expansion valve 23.

[0039] Specifically, the heat exchange component test device has a cooling mode, a first fan 41 is provided on one side of the condenser 4, and a second fan 81 is provided on one side of the subcooler 8. The inlet of the condenser 4 is connected to the outlet of the compressor 1, a first flow path is provided between the outlet of the condenser 4 and the first port of the heat exchange component 32, and a second flow path is provided between the second port of the heat exchange component 32 and the inlet of the compressor 1.

[0040] In the cooling mode, the first flow path passes through the subcooler 8, the first temperature and pressure sensor 16 and the first expansion valve 17 in sequence, and the second flow path passes through the second temperature and pressure sensor 21 and the second expansion valve 23 in sequence. The first temperature and pressure sensor 16 is used to obtain the condensation pressure and subcooling degree of the refrigerant flowing into the heat exchanger 32, and the second temperature and pressure sensor 21 is used to obtain the evaporation pressure and superheat degree of the refrigerant flowing out of the heat exchanger 32. The speed of the first fan 41 is adjustable to control the condensation pressure, and the speed of the second fan 81 is adjustable to control the subcooling degree. The opening degree of the first expansion valve 17 is adjustable to control the superheat degree, and the opening degree of the second expansion valve 23 is adjustable to control the evaporation pressure.

[0041] In other words, the heat exchange component testing device according to the embodiment of the present application is mainly composed of a compressor 1, a condenser 4, a subcooler 8, a first temperature and pressure sensor 16, a first expansion valve 17, a second temperature and pressure sensor 21 and a second expansion valve 23.

[0042] The heat exchanger testing device can test the heat exchange capacity of the heat exchanger 32. The heat exchanger 32 can be arranged on one side of the heat exchanged part so that the refrigerant in the heat exchanger 32 exchanges heat with the heat exchanged part. Optionally, the heat exchanger 32 can be a direct cooling and direct heating plate, and the heat exchanged part can be a battery cell in a power battery.

[0043] When the heat exchange component testing device is in the cooling mode, the refrigerant in the heat exchange component 32 can absorb the heat dissipated by the heat exchange component to cool the heat exchange component.

[0044] Specifically, Figure 2 As shown, the outlet of the compressor 1 can be connected to the inlet of the condenser 4, and the outlet of the condenser 4 can be connected to the inlet of the subcooler 8. The compressor 1 can output high-temperature and high-pressure gas, which can be condensed into high-temperature and high-pressure liquid after passing through the condenser 4. The condensed high-temperature and high-pressure liquid can continue to cool in the subcooler 8 to increase the subcooling degree of the refrigerant.

[0045] The subcooler 8, the first temperature and pressure sensor 16 and the first expansion valve 17 are connected in sequence through pipelines to form a first flow path. The refrigerant flowing out of the condenser 4 can flow into the heat exchange element 32 through the first flow path. The outlet of the subcooler 8 can be connected to the first port of the first temperature and pressure sensor 16, the second port of the first temperature and pressure sensor 16 can be connected to the first port of the first expansion valve 17, and the second port of the first expansion valve 17 can be connected to the first port of the heat exchange element 32.

[0046] The first temperature and pressure sensor 16 can be used to measure the pressure and temperature of the refrigerant flowing through. The pressure measured by the first temperature and pressure sensor 16 can be used as the condensing pressure. Since the condensing pressure and the condensing temperature have a one-to-one correspondence, the corresponding condensing temperature can be obtained by looking up the table according to the condensing pressure, and the difference between the temperature measured by the first temperature and pressure sensor 16 and the condensing temperature is the supercooling degree. Therefore, the condensing pressure and the supercooling degree in the refrigeration mode can be obtained by the first temperature and pressure sensor 16.

[0047] After passing through the first temperature and pressure sensor 16, the refrigerant can pass through the first expansion valve 17, so that the refrigerant expands and becomes a low-pressure and low-temperature two-phase state. Then the low-pressure and low-temperature two-phase refrigerant can enter the heat exchange element 32, and undergo an evaporation phase change in the heat exchange element 32 to absorb the heat of the heat exchange element. After absorbing heat, the refrigerant can become a low-temperature and low-pressure gas state.

[0048] The second temperature and pressure sensor 21 and the second expansion valve 23 can be connected in sequence through a pipeline to form a second flow path. The refrigerant flowing out of the heat exchanger 32 can flow into the compressor 1 through the second flow path. The second port of the heat exchanger 32 can be connected to the first port of the second temperature and pressure sensor 21, the second port of the second temperature and pressure sensor 21 can be connected to the first port of the second expansion valve 23, and the first port of the second expansion valve 23 can be connected to the inlet of the compressor 1.

[0049] The second temperature and pressure sensor 21 can measure the temperature and pressure of the refrigerant that becomes a low-temperature and low-pressure gas after absorbing heat. The pressure measured by the second temperature and pressure sensor 21 can be used as the evaporation pressure. Since there is a one-to-one correspondence between the evaporation pressure and the evaporation temperature, the corresponding evaporation temperature can be obtained by looking up the table according to the evaporation pressure, and the difference between the temperature measured by the second temperature and pressure sensor 21 and the evaporation temperature is the superheat. Therefore, the evaporation pressure and superheat in the refrigeration mode can be obtained by the second temperature and pressure sensor 21.

[0050] After passing through the second temperature and pressure sensor 21 , the refrigerant may enter the second expansion valve 23 to further reduce the pressure of the low-temperature and low-pressure gaseous refrigerant.

[0051] A first fan 41 is provided on one side of the condenser 4, and the speed of the first fan 41 can be adjusted. A second fan 81 is provided on one side of the subcooler 8, and the speed of the second fan 81 can also be adjusted. The openings of the first expansion valve 17 and the second expansion valve 23 can be adjusted respectively.

[0052] In the cooling mode, the condensing pressure can be adjusted by adjusting the speed of the first fan 41. The faster the speed of the first fan 41, the lower the condensing pressure. The subcooling degree can be adjusted by adjusting the speed of the second fan 81, that is, the subcooler 8 can adjust the subcooling degree. The faster the speed of the second fan 81, the greater the subcooling degree. The superheat can be adjusted by adjusting the opening of the first expansion valve 17. The larger the opening of the first expansion valve 17, the lower the superheat. The evaporation pressure can be adjusted by adjusting the opening of the second expansion valve 23. The larger the opening of the second expansion valve 23, the lower the evaporation pressure.

[0053] Therefore, according to the heat exchange component testing device of the embodiment of the present application, a subcooler 8 is arranged at the outlet end of the condenser 4, and the subcooling degree of the refrigerant entering the heat exchange component 32 can be adjusted in the refrigeration mode. The condensing pressure can be controlled by the speed of the first fan 41 on one side of the condenser 4, the opening of the first expansion valve 17 can control the superheat, and the second expansion valve 23 can control the evaporation pressure. Therefore, in the process of testing the refrigeration of the heat exchange component 32, the speed of the first fan 41, the speed of the second fan 81, the opening of the first expansion valve 17 and the opening of the second expansion valve 23 can be adjusted according to different refrigeration cycle boundary conditions to adjust the condensing pressure, subcooling degree, superheat degree and evaporation pressure, so as to compare the heat exchange capacity of different cold plates under different conditions, meet various testing requirements, and improve the application scope of the testing device.

[0054] In addition, the first temperature and pressure sensor 16 is arranged between the first expansion valve 17 and the subcooler 8, so as to facilitate the determination of the specific enthalpy value of the refrigerant entering the heat exchange element 32 by table lookup method, thereby improving the accuracy of the test.

[0055] According to one embodiment of the present application, Figure 3 As shown, the heat exchange component testing device has a heating mode, a third flow path is provided between the outlet of the condenser 4 and the second port of the heat exchange component 32, a fourth flow path is provided between the first port of the heat exchange component 32 and the inlet of the compressor 1, and the heat exchange component testing device also includes a third temperature and pressure sensor 20, a third expansion valve 12 and a heat exchanger 26.

[0056] In the heating mode, the third flow path passes through the second temperature and pressure sensor 21, and the fourth flow path passes through the third temperature and pressure sensor 20, the third expansion valve 12 and the heat exchanger 26 in sequence. The second temperature and pressure sensor 21 is used to obtain the condensing pressure and superheat of the refrigerant flowing into the heat exchange element 32, and the third temperature and pressure sensor 20 is used to obtain the subcooling of the refrigerant flowing out of the heat exchange element 32. The speed of the first fan 41 is adjustable to control the condensing pressure and superheat, and the opening of the third expansion valve 12 is adjustable to control the subcooling.

[0057] Specifically, the heat exchange component testing device can be switched between a cooling mode and a heating mode.

[0058] When the heat exchange component testing device is in the heating mode, the refrigerant in the heat exchange component 32 can release heat to the heat exchange component to heat the heat exchange component.

[0059] The inlet of the second flow path is communicated with the outlet of the condenser 4, the outlet of the second flow path is communicated with the second port of the heat exchange element 32, and the third flow path can pass through the second temperature sensor. The refrigerant flowing out of the condenser 4 can flow into the heat exchange element 32 through the third flow path. The first port of the second temperature sensor can be communicated with the second port of the heat exchange element 32 through a pipeline, and the second port of the second temperature sensor can be communicated with the outlet of the condenser 4 through a pipeline.

[0060] The high-temperature and high-pressure gas discharged from the compressor 1 passes through the condenser 4 and then enters the heat exchange element 32 through the third flow path, and is condensed into a liquid state in the heat exchange element 32 to become a high-temperature and high-pressure liquid.

[0061] The pressure measured by the second temperature and pressure sensor 21 can be used as the condensing pressure. Since the condensing pressure and the condensing temperature have a one-to-one correspondence, the corresponding condensing temperature can be obtained by looking up the table according to the condensing pressure, and the difference between the temperature measured by the second temperature and pressure sensor 21 and the condensing temperature is the superheat. Therefore, the condensing pressure and superheat in the heating mode can be obtained by the second temperature and pressure sensor 21.

[0062] The third temperature and pressure sensor 20, the third expansion valve 12 and the heat exchanger 26 can be connected in sequence through pipelines to form a fourth flow path. The refrigerant flowing out of the heat exchange element 32 can flow into the compressor 1 through the fourth flow path. The first port of the third temperature and pressure sensor 20 can be connected to the first port of the heat exchange element 32, the second port of the third temperature and pressure sensor 20 can be connected to the first port of the third expansion valve 12, the second port of the third expansion valve 12 can be connected to the first port of the heat exchanger 26, and the second port of the heat exchanger 26 can be connected to the inlet of the compressor 1.

[0063] The difference between the temperature measured by the third temperature and pressure sensor 20 and the condensation temperature obtained in the heating mode is the supercooling degree. Therefore, the supercooling degree in the heating mode can be obtained by the third temperature and pressure sensor 20.

[0064] After passing through the third temperature and pressure sensor 20, the refrigerant may pass through the third expansion valve 12, so that the refrigerant expands and becomes a low-pressure and low-temperature two-phase state. Then, the low-pressure and low-temperature two-phase refrigerant may enter the heat exchanger 26, and undergo an evaporation phase change in the heat exchanger 26 to absorb heat. After absorbing heat, the refrigerant may become a low-temperature and low-pressure gas state and flow back to the compressor 1.

[0065] In this embodiment, when the heat exchange component test device is in the heating mode, the condensing pressure and the superheat can be adjusted by adjusting the rotation speed of the first fan 41. The faster the rotation speed of the first fan 41, the smaller the condensing pressure. In addition, the condensing pressure and the superheat can also be adjusted by adjusting the rotation speed of the compressor 1. The subcooling can be adjusted by adjusting the opening of the third expansion valve 12. Therefore, in the process of testing the heating of the heat exchange component 32, the rotation speed of the first fan 41 and the opening of the third expansion valve 12 can be adjusted according to different refrigeration cycle boundary conditions to adjust the condensing pressure, superheat and subcooling, so as to compare the heat exchange capacity of different cold plates under different conditions, meet various test requirements, and improve the scope of application of the test device.

[0066] According to some other embodiments of the present application, the heat exchange component testing device also includes: a first solenoid valve 11, a second solenoid valve 15, a third solenoid valve 24, a fourth solenoid valve 29, a fifth solenoid valve 25, a sixth solenoid valve 18 and a seventh solenoid valve 13, so as to control the heat exchange component testing device to switch between cooling mode and heating mode.

[0067] The first flow path passes through the subcooler 8, the first solenoid valve 11, the second solenoid valve 15, the first temperature and pressure sensor 16, the first expansion valve 17, and the third temperature and pressure sensor 20 in sequence. The second flow path passes through the second temperature and pressure sensor 21, the second expansion valve 23, and the third solenoid valve 24 in sequence. The third flow path passes through the fourth solenoid valve 29, the fifth solenoid valve 25, and the second temperature and pressure sensor 21 in sequence. The fourth flow path passes through the third temperature and pressure sensor 20, the sixth solenoid valve 18, the seventh solenoid valve 13, the third expansion valve 12, and the heat exchanger 26 in sequence.

[0068] Specifically, the heat exchange component testing device may include at least seven solenoid valves for controlling the switching between the cooling mode and the heating mode.

[0069] The first port of the first solenoid valve 11 can be communicated with the outlet of the subcooler 8, the second port of the first solenoid valve 11 can be communicated with the first port of the second solenoid valve 15, and the second port of the second solenoid valve 15 can be communicated with the first port of the first temperature and pressure sensor 16. The first port of the third solenoid valve 24 can be communicated with the second port of the second expansion valve 23, and the second port of the third solenoid valve 24 can be communicated with the inlet of the compressor 1.

[0070] The first port of the fourth solenoid valve 29 can be communicated with the outlet of the condenser 4, the second port of the fourth solenoid valve 29 can be communicated with the first port of the fifth solenoid valve 25, and the first port of the fifth solenoid valve 25 is communicated with the first port of the second expansion valve 23, and the second port of the fifth solenoid valve 25 is communicated with the first port of the second temperature and pressure sensor 21. The first port of the sixth solenoid valve 18 is communicated with the second port of the first expansion valve 17, and the second port of the sixth solenoid valve 18 is communicated with the first port of the second solenoid valve 15. The first port of the seventh solenoid valve 13 is communicated with the second port of the sixth solenoid valve 18, the second port of the seventh solenoid valve 13 is communicated with the first port of the third expansion valve 12, the second port of the third expansion valve 12 is communicated with the first port of the heat exchanger 26, and the second port of the heat exchanger 26 is communicated with the inlet of the compressor 1.

[0071] When the heat exchanger test device is in the cooling mode, the first solenoid valve 11, the second solenoid valve 15 and the third solenoid valve 24 are opened, and the fourth solenoid valve 29, the fifth solenoid valve 25, the sixth solenoid valve 18 and the seventh solenoid valve 13 are closed. The refrigerant flowing out of the condenser 4 enters the heat exchanger 32 from the first flow path, and the refrigerant flowing out of the heat exchanger 32 flows back to the compressor 1 from the second flow path.

[0072] In other words, the refrigerant can flow back to the compressor 1 after passing through the compressor 1, the condenser 4, the subcooler 8, the first solenoid valve 11, the second solenoid valve 15, the first temperature and pressure sensor 16, the first expansion valve 17 and the third temperature and pressure sensor 20, the heat exchange element 32, the second temperature and pressure sensor 21, the second expansion valve 23 and the third solenoid valve 24 in sequence, thereby forming a cooling circulation loop.

[0073] When the heat exchanger testing device is in the heating mode, the first solenoid valve 11, the second solenoid valve 15 and the third solenoid valve 24 are closed, and the fourth solenoid valve 29, the fifth solenoid valve 25, the sixth solenoid valve 18 and the seventh solenoid valve 13 are opened. The refrigerant flowing out of the condenser 4 enters the heat exchanger 32 from the third flow path, and the refrigerant flowing out of the heat exchanger 32 flows back to the compressor 1 from the fourth flow path.

[0074] In other words, the refrigerant can flow back to the compressor 1 after passing through the compressor 1, the condenser 4, the fourth solenoid valve 29, the fifth solenoid valve 25, the second temperature and pressure sensor 21, the heat exchanger 32, the third temperature and pressure sensor 20, the sixth solenoid valve 18, the seventh solenoid valve 13, the third expansion valve 12 and the heat exchanger 26 in sequence, thereby forming a heating circulation loop.

[0075] Therefore, by controlling the on and off of the seven solenoid valves in this embodiment, the heat exchange component testing device can be controlled to switch between the cooling mode and the heating mode, so as to test the performance of the heat exchange component 32 under cooling and heating conditions respectively, meeting different working condition testing requirements.

[0076] In some specific embodiments of the present application, a fifth flow path is further provided between the outlet of the condenser 4 and the inlet of the compressor 1, and the heat exchange component testing device further includes: an eighth solenoid valve 9 and a fourth expansion valve 10. The fifth flow path passes through the subcooler 8, the eighth solenoid valve 9, the fourth expansion valve 10 and the heat exchanger 26 in sequence.

[0077] In other words, the refrigerant flowing out of the condenser 4 can flow back to the compressor 1 after passing through the subcooler 8, the eighth solenoid valve 9, the fourth expansion valve 10 and the heat exchanger 26 in sequence.

[0078] Specifically, the outlet of the subcooler 8 can be connected to the first port of the eighth solenoid valve 9, the second port of the eighth solenoid valve 9 can be connected to the first port of the fourth expansion valve 10, the second port of the fourth expansion valve 10 can be connected to the first port of the heat exchanger 26, and the second port of the heat exchanger 26 can be connected to the inlet of the compressor 1.

[0079] Therefore, in both the cooling mode and the heating mode, the eighth solenoid valve 9 can be opened to allow the refrigerant flowing out of the condenser 4 to flow back to the compressor 1 through the fifth flow path, that is, the fifth flow path can be formed into a branch path to divert the refrigerant flowing out of the condenser 4. In addition, the heat exchange capacity of the heat exchange element 32 can be controlled by controlling the refrigerant flow rate of the branch path, so the flow rate of the refrigerant allocated to the heat exchange element 32 can be adjusted according to the heating power of the heat exchange element, so that the test power of the heat exchange element test device is adapted to the heating power of the heat exchange element.

[0080] According to some optional embodiments of the present application, the heat exchange component testing device further includes a flow meter 14, the first flow path and the fourth flow path flow through the flow meter 14 respectively, and the flow meter 14 is used to measure the flow rate of the refrigerant after condensation.

[0081] In the refrigeration mode, the first flow path can pass through the cooler 8, the flow meter 14, the first temperature and pressure sensor 16, the first expansion valve 17 and the third temperature and pressure sensor 20 in sequence. The flow meter 14 can measure the flow rate of the condensed refrigerant flowing out of the subcooler 8.

[0082] In the heating mode, the fourth flow path may pass through the third temperature and pressure sensor 20 , the flow meter 14 and the third expansion valve 12 in sequence. The flow meter 14 may measure the flow rate of the refrigerant flowing out after condensing in the heat exchange element 32 .

[0083] In some specific embodiments, the first port of the flow meter 14 can be communicated with the second port of the first solenoid valve 11 and the first port of the seventh solenoid valve 13, respectively. When the first solenoid valve 11 is opened, the first port of the flow meter 14 can be communicated with the outlet of the subcooler 8, and when the seventh solenoid valve 13 is opened, the first port of the flow meter 14 can be communicated with the first port of the third expansion valve 12. The second port of the flow meter 14 can be communicated with the first port of the second solenoid valve 15 and the second port of the sixth solenoid valve 18, respectively. When the second solenoid valve 15 is opened, the second port of the flow meter 14 can be communicated with the first port of the first temperature and pressure sensor 16, and when the sixth solenoid valve 18 is opened, the second port of the flow meter 14 can be communicated with the second port of the third temperature and pressure sensor 20.

[0084] According to some other embodiments of the present application, the heat exchanger 26 has a first channel 261 and a second channel 262, and the refrigerant in the first channel 261 and the refrigerant in the second channel 262 perform heat exchange in the heat exchanger 26, and the first channel 261 is connected to the fourth flow path. The heat exchange component testing device also includes a pump body 28 and a heater 27, and the pump body 28, the heater 27 and the second channel 262 are connected end to end to form a heating circuit.

[0085] Specifically, the first port of the first channel 261 may be communicated with the second port of the fourth expansion valve 10 and the second port of the third expansion valve 12, respectively, and the second port of the first channel 261 may be communicated with the inlet of the compressor 1. The refrigerant in the fifth flow path may flow back to the compressor 1 through the first channel 261. In the heating mode, the refrigerant in the fourth flow path may also flow back to the compressor 1 through the first channel 261.

[0086] The first port of the second channel 262 can be communicated with the inlet of the pump body 28, the outlet of the pump body 28 can be communicated with the inlet of the heater 27, and the outlet of the heater 27 can be communicated with the second port of the second channel 262. The second channel 262, the pump body 28 and the heater 27 can be connected through a pipeline to form a heating circuit. The heater 27 can heat the refrigerant in the heating circuit. The refrigerant in the heating circuit can perform heat exchange with the refrigerant in the first channel 261 in the second channel 262, so that the refrigerant in the first channel 261 becomes a low-temperature and low-pressure gas state.

[0087] In cooling mode, the low-temperature and low-pressure gaseous refrigerant flowing out of the first channel 261 of the heat exchanger 26 can be combined with the low-temperature and low-pressure gaseous refrigerant flowing out of the heat exchange element 32 and then enter the compressor 1. In heating mode, the refrigerant flowing out of the heat exchange element 32 can be combined with the refrigerant flowing out of the subcooler 8 and then enter the first channel 261 to perform heat exchange with the high-temperature refrigerant in the second channel 262, so that the refrigerant flowing out of the first channel 261 becomes a low-temperature and low-pressure gas state.

[0088] In some specific embodiments of the present application, the refrigerant in the heating circuit is liquid, and the heater 27 is a liquid heater. The liquid heater is less affected by the environment when heating the liquid, and has low energy consumption.

[0089] For example, the liquid heater may be a PTC liquid heater. The PTC heater 27 has the advantages of low power consumption and high safety.

[0090] According to some other embodiments of the present application, the heat exchange component testing device further includes a liquid storage tank 33 , the inlet of the liquid storage tank 33 is connected to the outlet of the condenser 4 , and the outlet of the liquid storage tank 33 is connected to the inlet of the subcooler 8 .

[0091] Specifically, the liquid storage tank 33 can be connected between the condenser 4 and the subcooler 8, and the refrigerant flowing out of the condenser 4 can flow into the liquid storage tank 33 for storage. The subcooler 8 can receive the refrigerant flowing out of the liquid storage tank 33. The liquid storage tank 33 can be provided to store the refrigerant in the flow path.

[0092] In the heating mode, part of the refrigerant flowing out of the condenser 4 can flow into the heat exchange element 32 through the third flow path, and the other part can flow into the liquid storage tank 33 and flow back to the compressor 1 through the fifth flow path.

[0093] In some other optional embodiments, a sight glass 7 may be provided between the outlet of the liquid storage tank 33 and the inlet of the supercooler 8, through which the bubble state of the refrigerant in this section of the pipeline may be observed.

[0094] According to some optional embodiments of the present application, the heat exchange component testing device further includes: a ninth solenoid valve 19 , a tenth solenoid valve 22 , a first one-way valve 34 and a vacuum pump 35 .

[0095] The ninth solenoid valve 19 is connected between the first expansion valve 17 and the heat exchanger 32. The tenth solenoid valve 22 is connected between the second temperature and pressure sensor 21 and the second expansion valve 23. The first port of the first check valve 34 is communicated with the first port of the heat exchanger 32. The vacuum pump 35 is communicated with the second port of the first check valve 34 to evacuate the heat exchanger 32.

[0096] Specifically, the first port of the ninth solenoid valve 19 can be communicated with the second port of the first expansion valve 17, and the second port of the ninth solenoid valve 19 can be communicated with the first port of the heat exchanger 32. Optionally, when a third temperature and pressure sensor 20 is provided between the first expansion valve 17 and the heat exchanger 32, the second port of the ninth solenoid valve 19 can be communicated with the first port of the third temperature sensor.

[0097] The first port of the tenth solenoid valve 22 can be communicated with the second port of the second temperature and pressure sensor 21, and the second port of the tenth solenoid valve 22 can be communicated with the first port of the second expansion valve 23. In some specific embodiments, the second port of the tenth solenoid valve 22 can also be communicated with the second port of the fifth solenoid valve 25.

[0098] The first one-way valve 34 allows the fluid in the pipeline to flow from its first port to its second port. The first port of the first one-way valve 34 can be communicated with the second port of the ninth solenoid valve 19 , and the second port of the first one-way valve 34 can be communicated with the vacuum pump 35 .

[0099] The heat exchange component testing device may have a recovery mode. The process of the recovery mode is described in detail below.

[0100] like Figure 4 As shown, first, the second solenoid valve 15, the third solenoid valve 24, the fifth solenoid valve 25, the sixth solenoid valve 18, the seventh solenoid valve 13 and the tenth solenoid valve 22 can be opened, and the first solenoid valve 11, the fourth solenoid valve 29, the eighth solenoid valve 9 and the ninth solenoid valve 19 can be closed. At this time, the running compressor 1 can extract the refrigerant in the heat exchange element 32 into the liquid storage tank 33.

[0101] Then, the pressure value measured by the second temperature and pressure sensor 21 is obtained, and when the pressure value is less than or equal to -1 bar, the tenth solenoid valve 22 and the compressor 1 are closed. At this time, since the ninth solenoid valve 19 and the tenth solenoid valve 22 are both closed, the heat exchanger 32 can be isolated from other structures except the second temperature and pressure sensor 21 and the third temperature and pressure sensor 20.

[0102] Then the vacuum pump 35 can be started, and the air pressure in the heat exchange element 32 reaches -1 bar, that is, the pressure value measured by the second temperature and pressure sensor 21 reaches -1 bar, and the pressure is maintained for 30 minutes to complete the recovery of the refrigerant.

[0103] In this embodiment, by providing the ninth solenoid valve 19 and the tenth solenoid valve 22, they can cooperate with the other solenoid valves mentioned above to switch the heat exchanger test device to the recovery mode, recover the refrigerant in the flow path, and avoid refrigerant residue in the heat exchanger 32. After the refrigerant is recovered, the heat exchanger 32 can be easily and quickly disassembled to replace other heat exchangers 32 to be tested, which is conducive to improving the test efficiency and simplifying the test operation.

[0104] In some optional embodiments, a vacuum gauge 33 may be provided between the first port of the first one-way valve 34 and the second port of the ninth solenoid valve 19 to measure the vacuum degree.

[0105] It should be noted that when the heat exchanger 32 is a direct cooling and direct heating plate, and the heat exchanged element is a battery cell in a power battery, the direct cooling and direct heating plate and the battery cell can be fixedly installed in a power battery. Therefore, removing the heat exchanger 32 from the heat exchanger test device can be removing the entire power battery from the heat exchanger test device.

[0106] In some specific embodiments of the present application, the heat exchange component testing device further includes: a filling machine 36 , a second one-way valve 37 and a third one-way valve 38 .

[0107] The filling machine 36 has a first filling port and a second filling port, the first filling port is connected to the inlet of the liquid storage tank 33, and the second filling port is connected to the inlet of the heat exchanger 26. The second check valve 37 is connected between the first filling port and the inlet of the liquid storage tank 33 to allow the refrigerant to flow in one direction to the liquid storage tank 33. The third check valve 38 is connected between the second filling port and the inlet of the heat exchanger 26 to allow the refrigerant to flow in one direction to the heat exchanger 26.

[0108] Specifically, the first filling port of the filling machine 36 can be connected to the inlet of the liquid storage tank 33 through the second one-way valve 37, and the refrigerant in the filling machine 36 can flow unidirectionally into the liquid storage tank 33 through the second one-way valve 37. The second filling port of the filling machine 36 can be connected to the first port of the first channel 261 in the heat exchanger 26 through the third one-way valve 38, and the refrigerant in the filling machine 36 can be unidirectionally filled into the heat exchanger 26 through the third one-way valve 38, and then flow back to the compressor 1 through the heat exchanger 26.

[0109] The heat exchange component testing device may also have a filling mode, which is described in detail below.

[0110] The refrigerant can be added when the heat exchanger 32 is connected to the heat exchanger testing device, or when the heat exchanger 32 is disconnected from the heat exchanger testing device.

[0111] When the heat exchanger 32 is disconnected from the heat exchanger testing device, the ninth solenoid valve 19 and the tenth solenoid valve 22 can be closed, and the remaining solenoid valves can be opened. At this time, the filling machine 36 can add refrigerant to the high-pressure section in the flow path through the second one-way valve 37, and can also add refrigerant to the low-pressure section in the flow path through the third one-way valve 38.

[0112] When the heat exchanger 32 is connected to the heat exchanger testing device, the compressor 1 can be operated, the ninth solenoid valve 19 and the tenth solenoid valve 22 can be opened, and the remaining solenoid valves can also be in an open state. The filling machine 36 can add refrigerant to the low-pressure section in the flow path through the third solenoid valve 24.

[0113] In this embodiment, a filling machine 36, a second one-way valve 37 and a third one-way valve 38 are provided. By controlling each solenoid valve, the heat exchange component testing device can be switched to a filling mode, and the filling of the refrigerant can be completed quickly and efficiently, which is beneficial to improving the testing efficiency.

[0114] According to some optional embodiments of the present application, the heat exchange component testing device further includes: an oil-gas separator 3 and a gas-liquid separator 30 .

[0115] The inlet of the oil-gas separator 3 is connected to the outlet of the compressor 1, and the outlet of the oil-gas separator 3 is connected to the inlet of the condenser 4. The inlet of the gas-liquid separator 30 is connected to the outlet of the second expansion valve 23 and the outlet of the heat exchanger 26, and the outlet of the gas-liquid separator 30 is connected to the inlet of the compressor 1.

[0116] Thus, the oil-gas separator 3 can separate the lubricating oil in the refrigerant flowing out of the compressor 1. The gas-liquid separator 30 can separate and store the refrigerant flowing to the compressor 1, and provide an additional internal volume on the low-pressure side of the heat exchange component testing device to temporarily store excess refrigerant to protect the compressor 1.

[0117] In some optional embodiments, a fourth temperature and pressure sensor 2 may be provided between the outlet of the compressor 1 and the inlet of the oil-gas separator 3. A fifth temperature and pressure sensor 5 may be provided between the outlet of the condenser 4 and the inlet of the liquid storage tank 33. A sixth temperature and pressure sensor 31 may be provided between the outlet of the gas-liquid separator 30 and the inlet of the compressor 1. Thus, the pressure and temperature of the refrigerant in the corresponding pipeline can be obtained to determine whether an abnormality occurs in the test.

[0118] An embodiment of the present application further provides a testing system, which includes a heat exchange component testing device according to any of the above embodiments.

[0119] Since the heat exchange component testing device according to the embodiment of the present invention has the above-mentioned technical effects, the testing system according to the embodiment of the present application also has corresponding technical effects, that is, the speed of the first fan 41, the speed of the second fan 81, the opening of the first expansion valve 17 and the opening of the second expansion valve 23 can be adjusted according to different refrigeration cycle boundary conditions to adjust the condensing pressure, subcooling, superheating and evaporation pressure, so as to compare the heat exchange capacity of different cold plates under different conditions, meet various testing requirements, and improve the scope of application of the testing device.

[0120] In some specific implementations, the test system may also be an electronic control system, and the electronic control system may be electrically connected to the above-mentioned solenoid valves, temperature and pressure sensors, and expansion valves.

[0121] The present application also provides a test method, which is suitable for the heat exchange component test device according to any of the above embodiments. The test method specifically includes the following steps:

[0122] Connect the heat exchanger 32 to be tested between the first expansion valve 17 and the second temperature and pressure sensor 21;

[0123] The compressor 1 is started to allow the refrigerant to flow into the heat exchange element 32 through the first flow path, and the heat exchange element 32 exchanges heat with the heat exchange element;

[0124] The speed of the first fan 41 is adjusted so that the condensing pressure reaches a preset value, the speed of the second fan 81 is adjusted so that the subcooling degree reaches a preset value, the opening of the second expansion valve 23 is adjusted so that the evaporation pressure reaches a preset value, and the opening of the first expansion valve 17 is adjusted so that the superheat degree reaches a preset value.

[0125] The following takes the heat exchange element 32 as a direct cooling and direct heating plate and the heat exchanged element as a battery cell in a power battery as an example to describe in detail the specific steps of testing the heat exchange element testing device in the cooling mode and the heating mode.

[0126] The power battery is installed on the heat exchange component testing device so that the first port of the direct cooling and direct heating plate is connected to the second port of the third temperature and pressure sensor 20 , and the second port of the direct cooling and direct heating plate is connected to the first port of the second temperature and pressure sensor 21 .

[0127] In the cooling mode, the first solenoid valve 11, the second solenoid valve 15, the third solenoid valve 24, the eighth solenoid valve 9, the ninth solenoid valve 19 and the tenth solenoid valve 22 are opened, the fourth solenoid valve 29, the fifth solenoid valve 25, the sixth solenoid valve 18 and the seventh solenoid valve 13 are closed, and the compressor 1 is started so that the refrigerant flows through the fourth temperature and pressure sensor 2, the oil-gas separator 3 and the condenser 4 in sequence. A part of the refrigerant flowing out of the condenser 4 can enter the direct cooling and direct heating plate through the first flow path, and after absorbing the heat of the battery cell in the direct cooling and direct heating plate, it flows back to the compressor 1 through the second flow path. Another part of the refrigerant flowing out of the condenser 4 can flow back to the compressor 1 through the fifth flow path.

[0128] By adjusting the speed of the first fan 41, the speed of the second fan 81, the opening of the first expansion valve 17 and the opening of the second expansion valve 23, the condensing pressure, the evaporating pressure, the subcooling degree and the superheating degree can reach the preset values ​​to achieve the preset refrigeration cycle boundary conditions.

[0129] Then, the specific enthalpy value before and after the direct cooling and direct heating plate can be obtained according to the measurement results of the first temperature and pressure sensor 16 and the second temperature and pressure sensor 21, so as to calculate the heat exchange capacity of the direct cooling and direct heating plate to reflect the heat exchange performance of the direct cooling and direct heating plate.

[0130] In the heating mode, the fourth solenoid valve 29, the fifth solenoid valve 25, the sixth solenoid valve 18, the seventh solenoid valve 13, the eighth solenoid valve 9, the ninth solenoid valve 19 and the tenth solenoid valve 22 are opened, and the first solenoid valve 11, the second solenoid valve 15 and the third solenoid valve 24 are closed. The compressor 1 is started so that the refrigerant flows through the fourth temperature and pressure sensor 2, the oil-gas separator 3 and the condenser 4 in sequence. A part of the refrigerant flowing out of the condenser 4 can pass through the third flow path to directly cool and heat the plate, and after heating the battery cell in the direct cooling and heating plate, it flows back to the compressor 1 through the fourth flow path. Another part of the refrigerant flowing out of the condenser 4 can flow back to the compressor 1 through the fifth flow path.

[0131] By adjusting the rotation speed of the first fan 41 and the opening of the third expansion valve 12, the condensing pressure, the subcooling degree and the superheating degree can reach the preset values ​​to realize the preset heating cycle boundary conditions.

[0132] Then, the specific enthalpy value before and after the direct cooling and heating plate can be obtained according to the measurement results of the second temperature and pressure sensor 21 and the third temperature and pressure sensor 20, so as to calculate the heat exchange capacity of the direct cooling and heating plate to reflect the heat exchange performance of the direct cooling and heating plate.

[0133] Since the heat exchange component testing device according to the embodiment of the present invention has the above-mentioned technical effects, the testing method according to the embodiment of the present application also has corresponding technical effects, that is, the speed of the first fan 41, the speed of the second fan 81, the opening of the first expansion valve 17 and the opening of the second expansion valve 23 can be adjusted according to different refrigeration cycle boundary conditions to adjust the condensing pressure, subcooling, superheating and evaporation pressure, so as to compare the heat exchange capacity of different cold plates under different conditions, meet various testing requirements, and improve the scope of application of the testing device.

[0134] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A heat exchange component testing device, used to test the heat exchange performance of a heat exchange component, characterized in that: The heat exchange component testing device has a cooling mode, and the heat exchange component testing device comprises: A compressor, a condenser, a subcooler, a first temperature and pressure sensor, a first expansion valve, a second temperature and pressure sensor, and a second expansion valve. A first fan is provided on one side of the condenser, and a second fan is provided on one side of the subcooler. The inlet of the condenser is communicated with the outlet of the compressor, a first flow path is provided between the outlet of the condenser and the first port of the heat exchange element, and a second flow path is provided between the second port of the heat exchange element and the inlet of the compressor. In the cooling mode, the first flow path passes through the subcooler, the first temperature and pressure sensor, and the first expansion valve in sequence, and the second flow path passes through the second temperature and pressure sensor and the second expansion valve in sequence. The first temperature and pressure sensor is used to obtain the condensation pressure and supercooling degree of the refrigerant flowing into the heat exchange element, and the second temperature and pressure sensor is used to obtain the evaporation pressure and superheating degree of the refrigerant flowing out of the heat exchange element. The speed of the first fan is adjustable to control the condensing pressure, and the speed of the second fan is adjustable to control the subcooling degree. The opening degree of the first expansion valve is adjustable to control the superheat, and the opening degree of the second expansion valve is adjustable to control the evaporation pressure.

2. The heat exchange component testing device according to claim 1, characterized in that: The heat exchange component testing device has a heating mode, a third flow path is provided between the outlet of the condenser and the second port of the heat exchange component, a fourth flow path is provided between the first port of the heat exchange component and the inlet of the compressor, and the heat exchange component testing device further includes: The third temperature and pressure sensor, the third expansion valve and the heat exchanger, In the heating mode, the third flow path passes through the second temperature and pressure sensor, and the fourth flow path passes through the third temperature and pressure sensor, the third expansion valve, and the heat exchanger in sequence. The second temperature and pressure sensor is used to obtain the condensation pressure and superheat of the refrigerant flowing into the heat exchange element, and the third temperature and pressure sensor is used to obtain the supercooling of the refrigerant flowing out of the heat exchange element. The rotation speed of the first fan is adjustable to control the condensing pressure and the superheat, and the opening degree of the third expansion valve is adjustable to control the subcooling.

3. The heat exchange component testing device according to claim 2, characterized in that: Also includes: a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a sixth solenoid valve and a seventh solenoid valve to control the heat exchange component testing device to switch between the cooling mode and the heating mode, The first flow path passes through the subcooler, the first solenoid valve, the second solenoid valve, the first temperature and pressure sensor, the first expansion valve, and the third temperature and pressure sensor in sequence. The second flow path passes through the second temperature and pressure sensor, the second expansion valve and the third solenoid valve in sequence. The third flow path passes through the fourth solenoid valve, the fifth solenoid valve, and the second temperature and pressure sensor in sequence. The fourth flow path passes through the third temperature and pressure sensor, the sixth solenoid valve, the seventh solenoid valve, the third expansion valve, and the heat exchanger in sequence.

4. The heat exchange component testing device according to claim 2, characterized in that: A fifth flow path is further provided between the outlet of the condenser and the inlet of the compressor, and the heat exchange component testing device further comprises: The eighth solenoid valve and the fourth expansion valve, The fifth flow path passes through the subcooler, the eighth solenoid valve, the fourth expansion valve, and the heat exchanger in sequence.

5. The heat exchange component testing device according to claim 2, characterized in that: It also includes a flow meter, through which the first flow path and the fourth flow path flow respectively, and the flow meter is used to measure the flow of the refrigerant after condensation.

6. The heat exchange component testing device according to claim 2, characterized in that: The heat exchanger has a first channel and a second channel, and the refrigerant in the first channel and the refrigerant in the second channel perform heat exchange in the heat exchanger. The first channel is connected to the fourth flow path, The heat exchange component testing device further comprises a pump body and a heater. The pump body, the heater and the second channel are connected end to end to form a heating circuit.

7. The heat exchange component testing device according to claim 6, characterized in that: The refrigerant in the heating circuit is liquid, and the heater is a liquid heater.

8. The heat exchange component testing device according to claim 2, characterized in that: Also includes: A liquid storage tank, wherein the inlet of the liquid storage tank is communicated with the outlet of the condenser, and the outlet of the liquid storage tank is communicated with the inlet of the supercooler.

9. The heat exchange component testing device according to claim 8, characterized in that: Also includes: a ninth solenoid valve, the ninth solenoid valve being connected between the first expansion valve and the heat exchange element; a tenth solenoid valve connected between the second temperature and pressure sensor and the second expansion valve; a first one-way valve, wherein a first port of the first one-way valve is in communication with a first port of the heat exchange element; A vacuum pump is connected to the second port of the first one-way valve to evacuate the heat exchange element.

10. The heat exchange component testing device according to claim 8, characterized in that: Also includes: A filling machine, the filling machine having a first filling port and a second filling port, the first filling port being connected to the inlet of the liquid storage tank, and the second filling port being connected to the inlet of the heat exchanger; a second one-way valve, the second one-way valve being connected between the first filling port and the inlet of the liquid storage tank to allow the refrigerant to flow in one direction toward the liquid storage tank; A third one-way valve is connected between the second filling port and the inlet of the heat exchanger to allow the refrigerant to flow toward the heat exchanger in one direction.

11. The heat exchange component testing device according to claim 2, characterized in that: Also includes: An oil-gas separator, wherein the inlet of the oil-gas separator is communicated with the outlet of the compressor, and the outlet of the oil-gas separator is communicated with the inlet of the condenser; A gas-liquid separator, wherein the inlet of the gas-liquid separator is communicated with the outlet of the second expansion valve and the outlet of the heat exchanger, and the outlet of the gas-liquid separator is communicated with the inlet of the compressor.

12. A testing system, characterized in that: include: A heat exchange component testing device as described in any one of claims 1 to 11.

13. A method for testing a heat exchange component testing device according to any one of claims 1 to 11, characterized in that: The following steps are involved: Connecting the heat exchange element to be tested between the first expansion valve and the second temperature and pressure sensor; Starting the compressor to allow the refrigerant to flow into the heat exchange element through the first flow path, and the heat exchange element exchanges heat with the heat exchanged element; The speed of the first fan is adjusted so that the condensing pressure reaches a preset value, the speed of the second fan is adjusted so that the subcooling degree reaches a preset value, the opening of the second expansion valve is adjusted so that the evaporation pressure reaches a preset value, and the opening of the first expansion valve is adjusted so that the superheat degree reaches a preset value.

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