Water-cooled heat exchanger performance test bench

Abstract

The utility model relates to test technical field discloses a water -cooled heat exchanger performance test platform, including test bench, refrigerant test subassembly and cooling liquid test subassembly. Test bench is used for supplying refrigerant to refrigerant test subassembly, is used for supplying cooling liquid to cooling liquid test subassembly. Refrigerant test subassembly includes the first import temperature test pipeline, the first import pressure test pipeline, the first export pressure test pipeline and the first export temperature test pipeline that connect in proper order. Cooling liquid test subassembly includes the second import temperature test pipeline, the second import pressure test pipeline, the second export pressure test pipeline, the flow around pipeline and the second export temperature test pipeline that connect in proper order. The refrigerant circuit of water -cooled heat exchanger is connected between the first import pressure test pipeline and the first export pressure test pipeline, and the cooling liquid circuit of water -cooled heat exchanger is connected between the second import pressure test pipeline and the second export pressure test pipeline.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, and in particular to a performance test bench for a water-cooled heat exchanger. Background Technology

[0002] As a crucial component of the thermal management system in new energy vehicles, water-cooled heat exchangers were initially tested using methods similar to those used for traditional fuel vehicle heat exchangers. This involved placing temperature and pressure test lines at the inlet and outlet of the sample to measure the inlet and outlet temperatures and the sample's internal resistance. The heat exchange performance was then calculated by combining the measured inlet and outlet temperatures with the flow rate controlled on the test bench. However, test results revealed a significant temperature difference at the coolant outlet (maximum 1.2℃) during certain low-temperature operating conditions, leading to inaccurate measurements of the coolant-side heat exchange performance.

[0003] Therefore, there is an urgent need for a water-cooled heat exchanger performance test bench to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a performance test bench for water-cooled heat exchangers, which can test the heat exchange performance of water-cooled heat exchangers and provide accurate test results.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] A performance test bench for a water-cooled heat exchanger is provided, comprising:

[0007] A test bench for supplying refrigerant and coolant;

[0008] The refrigerant testing assembly includes a first inlet temperature testing pipeline, a first inlet pressure testing pipeline, a first outlet pressure testing pipeline, and a first outlet temperature testing pipeline. The refrigerant outlet of the test bench, the first inlet temperature testing pipeline, the first inlet pressure testing pipeline, and the refrigerant inlet of the water-cooled heat exchanger are connected. The refrigerant outlet of the water-cooled heat exchanger, the first outlet pressure testing pipeline, the first outlet temperature testing pipeline, and the refrigerant inlet of the test bench are also connected.

[0009] The coolant testing assembly includes a second inlet temperature testing pipeline, a second inlet pressure testing pipeline, a second outlet pressure testing pipeline, a bypass pipeline, and a second outlet temperature testing pipeline. The coolant outlet of the test bench, the second inlet temperature testing pipeline, the second inlet pressure testing pipeline, and the coolant inlet of the water-cooled heat exchanger are connected. The coolant outlet of the water-cooled heat exchanger, the second outlet pressure testing pipeline, the bypass pipeline, the second outlet temperature testing pipeline, and the coolant inlet of the test bench are also connected.

[0010] Optionally, the flow path includes a flow pipe and a flow element, the flow element being disposed inside the flow pipe, and the flow element having a gap with the inner wall of the flow pipe, the gap forming a wavy flow channel.

[0011] Optionally, the flow-around element and the flow-around tube are press-fitted at their contact points.

[0012] Optionally, the flow-driving element includes a plurality of flow-driving segments connected in sequence, each flow-driving segment including a spiral flow-driving blade, and the flow-driving blades of two adjacent flow-driving segments are spaced apart in the circumferential direction of the flow-driving tube.

[0013] Optionally, the absolute value of the difference between the inner diameter of the first inlet pressure test pipe and the inner diameter of the refrigerant inlet of the water-cooled heat exchanger is D1, where 0 ≤ D1 ≤ 3 mm; and / or,

[0014] The absolute value of the difference between the inner diameter of the first outlet pressure test pipeline and the inner diameter of the refrigerant outlet of the water-cooled heat exchanger is D2, where 0 ≤ D2 ≤ 3 mm.

[0015] Optionally, the absolute value of the difference between the inner diameter of the second inlet pressure test pipe and the inner diameter of the coolant inlet of the water-cooled heat exchanger is D3, where 0 ≤ D3 ≤ 1 mm; and / or,

[0016] The absolute value of the difference between the inner diameter of the second outlet pressure test pipeline and the inner diameter of the coolant outlet of the water-cooled heat exchanger is D4, where 0 ≤ D4 ≤ 1 mm.

[0017] Optionally, the water-cooled heat exchanger performance test bench further includes a sight glass, which is disposed between the second outlet temperature test pipeline and the coolant inlet of the test bench.

[0018] Optionally, the water-cooled heat exchanger performance test bench further includes a sight glass, which is disposed between the flow-through pipe and the second outlet temperature test pipe.

[0019] Optionally, the water-cooled heat exchanger performance test bench further includes a first insulation element, which encloses the water-cooled heat exchanger.

[0020] Optionally, the water-cooled heat exchanger performance test bench further includes a second insulation component, which encloses the refrigerant test component and the coolant test component.

[0021] The beneficial effects of this utility model are as follows:

[0022] The water-cooled heat exchanger performance test bench proposed in this utility model includes a test bench frame, a refrigerant testing assembly, and a coolant testing assembly. The test bench frame is used to supply refrigerant and coolant. The refrigerant testing assembly includes a first inlet temperature testing pipeline, a first inlet pressure testing pipeline, a first outlet pressure testing pipeline, and a first outlet temperature testing pipeline. The refrigerant outlet, the first inlet temperature testing pipeline, and the first inlet pressure testing pipeline of the test bench frame are connected to the refrigerant inlet of the water-cooled heat exchanger. The refrigerant outlet, the first outlet pressure testing pipeline, the first outlet temperature testing pipeline of the water-cooled heat exchanger, and the refrigerant inlet of the test bench frame are also connected. The coolant testing assembly includes a second inlet temperature test pipe, a second inlet pressure test pipe, a second outlet pressure test pipe, a bypass pipe, and a second outlet temperature test pipe. The coolant outlet, second inlet temperature test pipe, second inlet pressure test pipe, and coolant inlet of the water-cooled heat exchanger are connected to the test bench. After passing through the bypass pipe, the coolant is further mixed. This avoids the problem of inaccurate outlet temperature measurement caused by the high viscosity of the coolant in low-temperature environments (the outlet temperature of the coolant after heat exchange is particularly low, sometimes below -10℃), which can lead to poor mixing. This ensures the accuracy of the performance test results for the water-cooled heat exchanger. The bypass pipe, located after the second outlet pressure test pipe, does not affect the measurement of the internal resistance of the water-cooled heat exchanger and ensures thorough mixing of the coolant. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the performance test bench for the water-cooled heat exchanger provided in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the flow-driving component provided in an embodiment of the present invention.

[0025] In the picture:

[0026] 1. Test bench; 101. Main refrigerant outlet; 102. Main refrigerant inlet; 103. Main coolant outlet; 104. Main coolant inlet;

[0027] 2. Refrigerant testing assembly; 21. First inlet temperature testing pipeline; 22. First inlet pressure testing pipeline; 23. First outlet pressure testing pipeline; 24. First outlet temperature testing pipeline;

[0028] 3. Coolant testing assembly; 31. Second inlet temperature testing pipeline; 32. Second inlet pressure testing pipeline; 33. Second outlet pressure testing pipeline; 34. Second outlet temperature testing pipeline; 35. Flow bypass pipeline; 351. Flow bypass component; 36. Sight glass;

[0029] 100. Water-cooled heat exchanger. Detailed Implementation

[0030] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1 As shown, this embodiment provides a performance test bench for a water-cooled heat exchanger, including a test bench 1, a refrigerant testing assembly 2, and a coolant testing assembly 3. The test bench 1 is used to supply refrigerant and coolant. The refrigerant flows through the refrigerant circuit of the water-cooled heat exchanger 100 via the refrigerant testing assembly 2, and the coolant flows through the coolant circuit of the water-cooled heat exchanger 100 via the coolant testing assembly 3, to test the heat exchange performance of the water-cooled heat exchanger 100. Specifically, the refrigerant testing assembly 2 includes a first inlet temperature testing pipeline 21, a first inlet pressure testing pipeline 22, a first outlet pressure testing pipeline 23, and a first outlet temperature testing pipeline 24. The total refrigerant outlet of the test bench 1, the first inlet temperature testing pipeline 21, the first inlet pressure testing pipeline 22, and the refrigerant inlet of the water-cooled heat exchanger 100 are connected to allow the refrigerant supplied by the test bench 1 to flow into the refrigerant circuit of the water-cooled heat exchanger 100. The refrigerant outlet of the water-cooled heat exchanger 100, the first outlet pressure test pipeline 23, the first outlet temperature test pipeline 24, and the total refrigerant inlet of the test bench 1 are connected so that the refrigerant flowing into the refrigerant circuit of the water-cooled heat exchanger 100 can return to the test bench 1 and circulate repeatedly.

[0036] To determine the heat exchange performance of the water-cooled heat exchanger 100, the first inlet temperature test line 21 and the first inlet pressure test line 22 can measure the temperature and pressure of the refrigerant flowing into the refrigerant circuit, respectively. Similarly, the first outlet pressure test line 23 and the first outlet temperature test line 24 can measure the pressure and temperature of the refrigerant flowing out of the refrigerant circuit, respectively. By measuring the temperature and pressure of the refrigerant at the inlet and outlet of the water-cooled heat exchanger 100, the internal resistance and heat exchange capacity of the refrigerant circuit of the water-cooled heat exchanger 100 can be determined. The heat exchange capacity of the refrigerant is calculated based on the enthalpy difference between the inlet and outlet refrigerants and the refrigerant flow rate. The refrigerant flow rate can be measured by the flow meter built into the test bench 1. The enthalpy difference Δh between the inlet and outlet refrigerants is h2-h1. Based on the temperature and pressure of the inlet refrigerant measured by the first inlet temperature test pipe 21 and the first inlet pressure test pipe 22, the enthalpy h1 of the inlet refrigerant can be obtained by referring to the table. Based on the pressure and temperature of the outlet refrigerant measured by the first outlet pressure test pipe 23 and the first outlet temperature test pipe 24, the enthalpy h2 of the outlet refrigerant can be obtained by referring to the table.

[0037] The second inlet temperature test line 31 and the second inlet pressure test line 32 can measure the temperature and pressure of the coolant flowing into the coolant circuit, respectively. The second outlet pressure test line 33 and the second outlet temperature test line 34 can measure the pressure and temperature of the coolant flowing out of the coolant circuit, respectively. By measuring the temperature and pressure of the coolant at the inlet and outlet of the water-cooled heat exchanger 100, the internal resistance and heat transfer capacity of the coolant circuit of the water-cooled heat exchanger 100 can be determined. The heat transfer capacity of the coolant is calculated based on the temperature difference between the inlet and outlet coolant, the specific heat capacity of the coolant, and the flow rate of the coolant. The flow rate of the coolant can be measured by the flow meter built into the test bench 1. The specific heat capacity of the coolant is a fixed value depending on the selected coolant. The temperature difference ΔT between the inlet and outlet coolant is T2-T1. The second inlet temperature test line 31 measures the inlet coolant temperature T1, and the second outlet temperature test line 34 measures the outlet coolant temperature T2. The evaluation indicators for the heat exchange performance of the water-cooled heat exchanger 100 are internal resistance and heat exchange capacity.

[0038] In addition, a bypass pipe 35 is provided between the second outlet temperature test pipe 34 and the second outlet pressure test pipe 33. After passing through the bypass pipe 35, the coolant will be further mixed. This avoids the problem of inaccurate measurement of the coolant outlet temperature by the second outlet temperature test pipe 34 due to the high viscosity of the coolant and difficulty in mixing in low-temperature environments (the outlet temperature of the coolant in the water-cooled heat exchanger 100 is particularly low after heat exchange, and in some operating conditions it is below -10℃). This ensures the accuracy of the performance test results of the water-cooled heat exchanger 100. In this embodiment, the bypass pipe 35 is set after the second outlet pressure test pipe 33, which will not affect the measurement of the internal resistance of the water-cooled heat exchanger 100 and can also ensure that the coolant is fully mixed.

[0039] In this embodiment, the first inlet temperature test line 21 includes a first inlet temperature test tube and a first inlet temperature sensor disposed on the first inlet temperature test tube. The first inlet temperature sensor is used to measure the temperature of the refrigerant flowing through the first inlet temperature test tube. The first inlet pressure test line 22 includes a first inlet pressure test tube and a first inlet pressure sensor disposed on the first inlet pressure test tube. The first inlet pressure sensor is used to measure the pressure of the refrigerant flowing through the first inlet pressure test tube. The first outlet pressure test line 23 includes a first outlet pressure test tube and a first outlet pressure sensor disposed on the first outlet pressure test tube. The first outlet pressure sensor is used to measure the pressure of the refrigerant flowing through the first outlet pressure test tube. The first outlet temperature test line 24 includes a first outlet temperature test tube and a first outlet temperature sensor disposed on the first outlet temperature test tube. The first outlet temperature sensor is used to measure the temperature of the refrigerant flowing through the first outlet temperature test tube.

[0040] In this embodiment, the second inlet temperature test line 31 includes a second inlet temperature test tube and a second inlet temperature sensor disposed on the second inlet temperature test tube. The second inlet temperature sensor is used to measure the temperature of the coolant flowing through the second inlet temperature test tube. The second inlet pressure test line 32 includes a second inlet pressure test tube and a second inlet pressure sensor disposed on the second inlet pressure test tube. The second inlet pressure sensor is used to measure the pressure of the coolant flowing through the second inlet pressure test tube. The second outlet pressure test line 33 includes a second outlet pressure test tube and a second outlet pressure sensor disposed on the second outlet pressure test tube. The second outlet pressure sensor is used to measure the pressure of the coolant flowing through the second outlet pressure test tube. The second outlet temperature test line 34 includes a second outlet temperature test tube and a second outlet temperature sensor disposed on the second outlet temperature test tube. The second outlet temperature sensor is used to measure the temperature of the coolant flowing through the second outlet temperature test tube.

[0041] Optionally, the flow-around conduit 35 includes a flow-around tube and a flow-around element 351. The flow-around element 351 is inserted inside the flow-around tube, and there is a gap between the flow-around element 351 and the inner wall of the flow-around tube, which forms a flow-around channel. The flow-around channel is wavy. In specific implementation, the flow-around element 351 can be formed into a single piece by 3D printing or other processing methods, and then inserted into the flow-around tube. This is simpler and more convenient than setting flow-around protrusions on the inner wall of the flow-around tube.

[0042] Optionally, the flow element 351 and the flow tube are fitted with an interference fit. This ensures that the flow element 351 is fixed inside the flow tube without the need for additional fixing or bonding structures, making assembly convenient.

[0043] Optionally, such as Figure 2 As shown, the flow-through component 351 includes multiple flow-through sections, which are connected sequentially along the axial direction of the flow-through tube. Each flow-through section includes a spiral flow-through blade. The flow-through blades of two adjacent flow-through sections are spaced apart in the circumferential direction of the flow-through tube. This facilitates the mixing of the coolant between two adjacent flow-through sections after it is diverted and disturbed by one flow-through blade, ensuring the mixing efficiency of the coolant in a short time and reducing the length of the flow-through tube 35, thereby reducing the footprint of the water-cooled heat exchanger performance test bench.

[0044] In this embodiment, the absolute value of the difference between the inner diameter of the first inlet pressure test pipe 22 and the inner diameter of the refrigerant inlet of the water-cooled heat exchanger 100 is D1, where 0 ≤ D1 ≤ 3 mm. The absolute value of the difference between the inner diameter of the first outlet pressure test pipe 23 and the inner diameter of the refrigerant outlet of the water-cooled heat exchanger 100 is D2, where 0 ≤ D2 ≤ 3 mm. Specifically, since the first inlet pressure test pipe 22 includes a first inlet pressure test tube and a first inlet pressure sensor mounted on the first inlet pressure test tube, the inner diameter of the first inlet pressure test pipe 22 is the same as the inner diameter of the first inlet pressure test tube. The first inlet pressure test tube is selected as a circular tube, and the refrigerant inlet of the water-cooled heat exchanger 100 is also circular; both have the same shape and similar or identical cross-sectional areas. Since the first outlet pressure test pipe 23 includes a first outlet pressure test tube and a first outlet pressure sensor mounted on the first outlet pressure test tube, the inner diameter of the first outlet pressure test pipe 23 is the same as the inner diameter of the first outlet pressure test tube. The first outlet pressure test tube is a round tube, and the refrigerant outlet of the water-cooled heat exchanger 100 is also round. The two have the same shape and similar or identical cross-sectional areas. By setting it up in this way, the pressure change caused by the change in pipe diameter when the refrigerant enters and exits the water-cooled heat exchanger 100 can be reduced, thus avoiding affecting the test accuracy of the internal resistance and heat transfer of the refrigerant circuit of the water-cooled heat exchanger 100.

[0045] In this embodiment, the difference between the inner diameter of the second inlet pressure test pipe 32 and the inner diameter of the coolant inlet of the water-cooled heat exchanger 100 is D3, where 0 ≤ D3 ≤ 1 mm. The difference between the inner diameter of the second outlet pressure test pipe 33 and the inner diameter of the coolant outlet of the water-cooled heat exchanger 100 is D4, where 0 ≤ D4 ≤ 1 mm. Specifically, since the second inlet pressure test pipe 32 includes a second inlet pressure test tube and a second inlet pressure sensor mounted on the second inlet pressure test tube, the inner diameter of the second inlet pressure test pipe 32 is the same as the inner diameter of the second inlet pressure test tube. The second inlet pressure test tube is selected as a circular tube, and the coolant inlet of the water-cooled heat exchanger 100 is also circular; both have the same shape and similar or identical cross-sectional areas. Since the second outlet pressure test pipe 33 includes a second outlet pressure test tube and a second outlet pressure sensor mounted on the second outlet pressure test tube, the inner diameter of the second outlet pressure test pipe 33 is the same as the inner diameter of the second outlet pressure test tube. The second outlet pressure test tube is a round tube, and the coolant outlet of the water-cooled heat exchanger 100 is also round. The two have the same shape and similar or identical cross-sectional areas. By setting it up in this way, the pressure change caused by the change in pipe diameter when the coolant enters and exits the water-cooled heat exchanger 100 can be reduced, thus avoiding affecting the test accuracy of the internal resistance of the coolant circuit and the heat transfer of the water-cooled heat exchanger 100.

[0046] Furthermore, the water-cooled heat exchanger performance test bench also includes a sight glass 36, which is positioned between the second outlet temperature test pipe 34 and the main coolant inlet 104 of the test bench frame 1. The presence of air in the water-cooled heat exchanger 100 under test will reduce its heat exchange efficiency. Installing the sight glass 36 after the second outlet temperature test pipe 34 will not affect the measurement of temperature and pressure, and can also be used to check for air in the water-cooled heat exchanger 100, ensuring the absence of air, improving the accuracy of test results, reducing repetitive tests, and saving test costs. When using the sight glass 36 to check for air in the pipe, the pipe with the sight glass 36 installed can be tilted or placed vertically so that the air outlet of the pipe faces upwards for easy venting.

[0047] The sight glass 36 is located downstream of the second outlet pressure test line 33. Alternatively, the sight glass 36 can be placed between the bypass line 35 and the second outlet temperature test line 34. This will ensure that there is no air in the water-cooled heat exchanger 100 without affecting the temperature and pressure measurements, thus improving the accuracy of the test results.

[0048] Furthermore, the water-cooled heat exchanger performance test bench also includes a first insulation element, which encloses the water-cooled heat exchanger 100. The first insulation element insulates the water-cooled heat exchanger 100 from heat exchange with the ambient temperature, thereby further improving the accuracy of the test results.

[0049] Optionally, the water-cooled heat exchanger performance test bench also includes a second insulation component, which encloses the refrigerant test component 2 and the coolant test component 3. The second insulation component provides overall thermal insulation to the water-cooled heat exchanger performance test bench, also preventing heat exchange between the test components and the ambient temperature, further improving the accuracy of the test results.

[0050] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water-cooled heat exchanger performance test bench, characterized in that, include: Test bench (1), the test bench (1) is used to supply refrigerant and coolant; The refrigerant testing assembly (2) includes a first inlet temperature testing pipeline (21), a first inlet pressure testing pipeline (22), a first outlet pressure testing pipeline (23), and a first outlet temperature testing pipeline (24). The refrigerant outlet of the test bench (1), the first inlet temperature testing pipeline (21), the first inlet pressure testing pipeline (22), and the refrigerant inlet of the water-cooled heat exchanger (100) are connected. The refrigerant outlet of the water-cooled heat exchanger (100), the first outlet pressure testing pipeline (23), the first outlet temperature testing pipeline (24), and the refrigerant inlet of the test bench (1) are also connected. The coolant testing assembly (3) includes a second inlet temperature testing pipeline (31), a second inlet pressure testing pipeline (32), a second outlet pressure testing pipeline (33), a bypass pipeline (35), and a second outlet temperature testing pipeline (34). The coolant outlet of the test bench (1), the second inlet temperature testing pipeline (31), the second inlet pressure testing pipeline (32), and the coolant inlet of the water-cooled heat exchanger (100) are connected. The coolant outlet of the water-cooled heat exchanger (100), the second outlet pressure testing pipeline (33), the bypass pipeline (35), the second outlet temperature testing pipeline (34), and the coolant inlet of the test bench (1) are connected.

2. The water-cooled heat exchanger performance test bench according to claim 1, characterized in that, The flow path (35) includes a flow path and a flow path element (351). The flow path element (351) is inserted inside the flow path. The flow path element (351) has a gap with the inner wall of the flow path, and the gap forms a wave-shaped flow path.

3. The water-cooled heat exchanger performance test bench according to claim 2, characterized in that, The flow-through component (351) and the flow-through tube are press-fitted at the contact point.

4. The water-cooled heat exchanger performance test bench according to claim 2, characterized in that, The flow-through component (351) includes a plurality of flow-through sections connected in sequence, each of the flow-through sections including a spiral flow-through blade, and the flow-through blades of two adjacent flow-through sections are spaced apart in the circumferential direction of the flow-through tube.

5. The water-cooled heat exchanger performance test bench according to claim 1, characterized in that, The absolute value of the difference between the inner diameter of the first inlet pressure test pipe (22) and the inner diameter of the refrigerant inlet of the water-cooled heat exchanger (100) is D1, 0 ≤ D1 ≤ 3 mm; and / or, The absolute value of the difference between the inner diameter of the first outlet pressure test pipeline (23) and the inner diameter of the refrigerant outlet of the water-cooled heat exchanger (100) is D2, where 0 ≤ D2 ≤ 3 mm.

6. The water-cooled heat exchanger performance test bench according to claim 1, characterized in that, The absolute value of the difference between the inner diameter of the second inlet pressure test pipe (32) and the inner diameter of the coolant inlet of the water-cooled heat exchanger (100) is D3, where 0 ≤ D3 ≤ 1 mm; and / or, The absolute value of the difference between the inner diameter of the second outlet pressure test pipeline (33) and the inner diameter of the coolant outlet of the water-cooled heat exchanger (100) is D4, where 0 ≤ D4 ≤ 1 mm.

7. The water-cooled heat exchanger performance test bench according to claim 1, characterized in that, The water-cooled heat exchanger performance test bench also includes a sight glass (36), which is located between the second outlet temperature test pipeline (34) and the coolant inlet of the test bench frame (1).

8. The water-cooled heat exchanger performance test bench according to claim 1, characterized in that, The water-cooled heat exchanger performance test bench also includes a sight glass (36), which is disposed between the flow-through pipe (35) and the second outlet temperature test pipe (34).

9. The water-cooled heat exchanger performance test bench according to claim 1, characterized in that, The water-cooled heat exchanger performance test bench also includes a first insulation component, which encloses the water-cooled heat exchanger (100).

10. The water-cooled heat exchanger performance test bench according to claim 9, characterized in that, The water-cooled heat exchanger performance test bench also includes a second insulation component, which encloses the refrigerant test component (2) and the coolant test component (3).

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