Multifunctional integrated liquid cooling plate testing machine

Abstract

The invention relates to a multifunctional integrated liquid cooling plate testing machine which comprises a cabinet body, a testing inlet pipe and a testing outlet pipe which are used for being connected with a liquid cooling plate are arranged on the cabinet body, a pure water tank and a nitrogen cylinder are arranged in the cabinet body, a first liquid outlet and a first liquid return opening are formed in the pure water tank, the first liquid outlet is communicated with the testing inlet pipe through a first pipeline, and the first liquid return opening is communicated with the testing outlet pipe through a second pipeline. The first liquid return port is communicated with the test outlet pipe through a second pipeline, the first pipeline is provided with a variable frequency circulating pump, the nitrogen cylinder is communicated with a third pipeline, the third pipeline is connected with the first pipeline through a first stop valve, the first stop valve is communicated with a fourth pipeline, and the fourth pipeline is connected with the second pipeline through a first three-way valve. The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are provided with a cleanliness testing assembly, a thermal resistance testing assembly and an air tightness testing assembly. The liquid cooling plate testing device has the effect of realizing integrated testing of the liquid cooling plate.

Description

Technical Field

[0001] The present application relates to the technical field of liquid cooling plate testing, and in particular to a multifunctional integrated liquid cooling plate testing machine. Background Art

[0002] Liquid cold plates are highly efficient heat exchange devices that remove heat by circulating coolant through internal channels. They are widely used in areas such as new energy vehicle battery thermal management and server cooling. However, these applications place extremely high demands on the safety, stability, and heat dissipation efficiency of the equipment. Therefore, strict performance testing must be carried out after the liquid cold plates are produced.

[0003] Currently, the liquid cooling plate is mainly subjected to air tightness, cleanliness and thermal resistance tests. The air tightness test is aimed at detecting the sealing performance of the welding interfaces and joints of the liquid cooling plate to avoid safety hazards such as short circuit caused by coolant leakage; the cleanliness test is used to check whether there are impurities such as metal debris and oil in the flow channel to prevent foreign matter from clogging the flow channel and reducing the heat dissipation efficiency; the thermal resistance test evaluates the rationality of the flow channel design by measuring the pressure loss when the coolant circulates at different temperatures.

[0004] However, traditional testing methods usually use distributed testing equipment, and each test needs to be performed separately through a single device. This distributed testing method makes the testing process cumbersome and lengthy, reduces the testing efficiency of the liquid cooling plate, and frequently replaces the test pipe during the test, which can easily cause damage to the liquid cooling plate joints, which has obvious shortcomings. Summary of the Invention

[0005] In order to achieve integrated testing of liquid cooling plates, the present application provides a multifunctional integrated liquid cooling plate testing machine.

[0006] The present application provides a multifunctional integrated liquid cooling plate testing machine that adopts the following technical solutions: A multifunctional integrated liquid cooling plate testing machine comprises a cabinet, the cabinet being provided with a platform for placing the liquid cooling plate to be tested, the cabinet being provided with a test inlet pipe and a test outlet pipe for connecting to the liquid cooling plate, a pure water tank and a nitrogen cylinder being provided inside the cabinet, the pure water tank being provided with a liquid outlet 1 and a liquid return port 1, the liquid outlet 1 being connected to the test inlet pipe through a pipe 1, the liquid return port 1 being connected to the test outlet pipe through a pipe 2, a variable frequency circulation pump being provided on the pipe 1, a pipe 3 being connected to the nitrogen cylinder, the pipe 3 being connected to the pipe 1 through a stop valve 1, a pipe 4 being connected and installed on the stop valve 1, the pipe 4 being connected to the pipe 2 through a three-way valve 1, a cleanliness test assembly, a thermal resistance test assembly and an airtightness test assembly being provided on the pipe 1, the pipe 2, the pipe 3 and the pipe 4.

[0007] By adopting the above technical solution, during the test, the test inlet pipe and the test outlet pipe are connected to the liquid cooling plate to be tested. At this time, the loop formed by pipe one, pipe two, pipe three and pipe four and the flow channel of the test liquid cooling plate provides the medium to the test liquid cooling plate through a pure water tank or a nitrogen bottle. Subsequently, the airtightness test component is used to complete the airtightness test, the cleanliness test component completes the cleanliness test, and the thermal resistance test component completes the thermal resistance test. After the test is completed, the liquid cooling plate to be tested is taken out. The test machine of the present application integrates multiple test functions of airtightness, cleanliness, and thermal resistance into the same device, which changes the mode in which traditional distributed test equipment needs to perform each test separately, shortens the test time, and improves the test efficiency of the liquid cooling plate; at the same time, it avoids frequent replacement of test pipes, effectively preventing damage to the liquid cooling plate joints.

[0008] Optionally, the cleanliness testing component includes water quality sensor 1 and water quality sensor 2, the water quality sensor 1 is arranged on the pipeline 1 and is connected in parallel with a pneumatic ball valve through the pipeline 5, the pneumatic ball valve is used to open and close the pure water medium flow channel, the water quality sensor 2 is arranged on the pipeline 2, and the water quality sensor 1 and the water quality sensor 2 are used to detect the conductivity, turbidity and pH value of the pure water medium.

[0009] By adopting the above technical solution, before the test, the stop valve 1 and the three-way valve 1 are switched to allow the medium in the pure water tank to flow into the liquid cooling plate through the pipe 1 and the test inlet pipe, and then return through the test outlet pipe and the pipe 2. During the flow of the medium, the water quality sensor 1 monitors the water quality entering the liquid cooling plate 1. If the water quality does not meet the standard, the medium passage is cut off by the pneumatic ball valve. When the water quality sensor 1 monitors that the water quality is qualified, the pneumatic ball valve and the variable frequency circulation pump are opened to drive the pure water medium to flow into the liquid cooling plate. Then the pure water medium returns to the pipe 2 and passes through the water quality sensor for water quality detection. The water quality data detected by the water quality sensor 2 is used to determine whether it is qualified.

[0010] Optionally, the thermal resistance testing assembly includes a flow sensor, a hot and cold integrated machine and a temperature sensor 1 which are arranged in sequence on the pipe 1 along the flow direction of the medium, the hot and cold integrated machine is used to control the temperature of the medium, the pipe 2 is provided with a temperature sensor 2, and a differential pressure sensor is installed between the pipe 1 and the pipe 2, and the differential pressure sensor is used to measure the pressure difference between the test inlet pipe and the test outlet pipe.

[0011] By adopting the above technical solution, when conducting a thermal resistance test, the variable frequency circulation pump is turned on, and the flow sensor monitors the medium flow in real time and feeds back to the control system to ensure that the flow is stable at the preset test value. The hot and cold integrated machine controls the temperature of the medium in pipe one, and temperature sensor one detects the temperature of the medium before it enters the liquid cooling plate. The medium then flows into the liquid cooling plate through the test inlet pipe and then flows back from pipe two through the test outlet pipe. Temperature sensor two collects the temperature data of the medium after it flows out of the liquid cooling plate. During this process, the differential pressure sensor measures the pressure difference between the test inlet pipe and the test outlet pipe to obtain the thermal resistance data of the liquid cooling plate.

[0012] Optionally, the airtightness test assembly includes an electrical proportional valve arranged on the pipeline three, the electrical proportional valve is used to adjust the gas pressure in the pipeline three, a stop valve one is provided on the pipeline three, and a pipeline six is ​​installed between the pipeline one and the pipeline two through the air-controlled three-valve one and the air-controlled three-valve two, and a pressure sensor for monitoring the pressure is provided on the side of the pipeline two close to the test outlet pipe.

[0013] By adopting the above technical solution, before using the direct pressure method for air tightness testing, the states of the air-controlled three-valve one and the air-controlled three-valve two are switched so that pipeline six cuts off pipeline one and pipeline two. Pipe three is opened and the gas pressure inside pipeline three is controlled by the electrical proportional valve. At this time, the gas flows into the test inlet pipe and the test outlet pipe through pipeline three, pipeline four, pipeline one and pipeline two. When the pressure sensor detects that the pressure in the gas pipeline is stable, the stop valve one is closed to form a closed gas circuit connected to the liquid cooling plate. If there is a leak in the liquid cooling plate, the pressure inside the gas circuit will decrease over time. The pressure change is monitored in real time by the pressure sensor and compared with the standard pressure decay threshold to determine whether the air tightness is qualified.

[0014] Optionally, the airtight test assembly also includes a standard liquid cooling plate, and a pipe seven is installed between the pipe one and the pipe two via an air-controlled three-valve three and an air-controlled three-valve four. A stop valve two is provided on the pipe four, and the pipe seven short-circuits the standard liquid cooling plate. The differential pressure sensor is used to monitor the pressure difference between the liquid cooling plate to be tested and the standard liquid cooling plate.

[0015] By adopting the above technical solution, before using the differential pressure method for air tightness testing, close the first and second gas-controlled valves, and then open the electrical proportional valve. When the pressure sensor detects that the pressure in the gas pipeline is stable, close the first and second stop valves. At this time, two gas circuits leading to the standard liquid cold plate and the liquid cold plate to be tested are formed from the second stop valve on the fourth pipeline. If there is a leak in the liquid cold plate, the gas pressure in the circuit where the liquid cold plate to be tested is located will gradually decrease, while the pressure in the circuit where the standard liquid cold plate is located remains stable due to no leakage. The differential pressure sensor monitors the pressure difference between the two circuits in real time, and determines whether the air tightness is qualified by comparing the pressure difference with the set threshold.

[0016] Optionally, a liquid return port 2 is provided on the pure water tank, and the cleanliness test assembly also includes a pipe 8 connected to the liquid return port 2, and the pipe 8 is connected to the pipe 1 through a three-way valve 2, and the three-way valve 2 is located between the variable frequency circulation pump and the flow sensor.

[0017] By adopting the above technical solution, if water quality sensor 1 detects that the pure water medium provided by the pure water tank is unqualified, the flow direction of three-way valve 2 is switched, so that the unqualified pure water medium flows back to the inside of the pure water tank through pipe 1, pipe 8 and reflux port 2. In this way, the unqualified medium is automatically isolated and recovered, avoiding the contamination of the inside of pipe 1 caused by the flow of unqualified water quality along pipe 1, thereby ensuring the accuracy of the cleanliness test results.

[0018] Optionally, the pure water tank is provided with a second liquid outlet, and a wastewater treatment circuit is provided in the cabinet body, the wastewater treatment circuit includes a wastewater tank provided in the cabinet body, the wastewater tank is provided with a first water inlet, a second water inlet and a drain, the first water inlet is connected with the second liquid outlet through a pipe nine, a pipe ten is installed on the second pipe through a three-way valve, a pipe eleven is connected on the ten pipe through a four-way valve, the pipe eleven is connected with the second water inlet, a pipe twelve is provided on the drain, a drainage pump is installed on the pipe twelve, and the outlet end of the pipe twelve extends to the inside of the sewage pool.

[0019] By adopting the above technical solution, the water quality of the pure water tank is pre-tested before the cleanliness test is carried out. At this time, the directions of the air-controlled three-valve one, the air-controlled three-valve two and the three-way valve three are switched, so that a part of the pure water medium flows along the pipe one, the pipe six, the pipe two, the pipe ten and the pipe eleven to the inside of the waste water tank in sequence. During the flow of the pure water medium, if the water quality sensor one and the water quality sensor two detect that the pure water medium is qualified, it indicates that the water quality inside the pure water tank is qualified and the test can be carried out; if the water quality sensor two detects that the pure water medium is unqualified, the above steps are repeated to drain the pure water tank multiple times until the water quality meets the standard. If the water quality continues to be unqualified, it indicates that the pure water inside the pure water tank has been contaminated. The worker opens the manual valve to allow the unqualified water inside the pure water tank to enter the waste water tank through the pipe nine, thereby realizing the recycling of waste water. During the cleanliness test, when the water quality sensor 2 detects that the pure water medium flowing back from the test outlet pipe does not meet the water quality standards, the three-way valve 3 switches the direction, allowing the unqualified pure water medium to flow along the pipe 10 and the pipe 11 into the waste water tank; When the wastewater inside the wastewater tank is saturated, the drainage pump starts to discharge the wastewater in the wastewater tank from pipe 12 to the sewage pool. The setting of the wastewater treatment loop realizes the pre-detection of the water quality in the pure water tank, ensures the cleanliness of pipes 1 and 2, avoids the blockage of the liquid cooling plate flow channel or the deviation of the test results due to medium contamination, ensures the accuracy of the cleanliness test data, and realizes the centralized recovery of wastewater, reducing the possibility of energy waste.

[0020] Optionally, a drying circuit is provided in the cabinet, and the drying circuit includes an air heater provided on the pipe three, a pipe thirteen is installed on the pipe two through a three-way valve four, the pipe thirteen is connected to the pipe eleven through a four-way valve two, a pipe fourteen for exhaust is installed on the four-way valve two, a humidity sensor for monitoring humidity is provided on the pipe fourteen, and an electromagnetic valve three is provided on the pipe fourteen.

[0021] By adopting the above technical solution, after the cleanliness and thermal resistance tests are carried out, the air heater is started and nitrogen is used for heating. When the nitrogen temperature rises to the preset temperature, the electrical proportion is then opened and the direction of the three-way valve four is switched, so that the high-temperature nitrogen passes through pipe three, pipe one, the test inlet pipe, the liquid cold plate to be tested, the test outlet pipe, pipe two and pipe thirteen in sequence, thereby achieving drying of the liquid cold plate to be tested and the inside of the gas circuit. At the same time, the high-temperature nitrogen blows the residual pure water medium into the wastewater tank. When the humidity sensor detects that the gas humidity inside the flow pipe fourteen meets the standard, the solenoid valve is opened to exhaust. The setting of the drying circuit realizes the purge of the gas circuit and the flow channel of the liquid cold plate to be tested by high-temperature nitrogen, thereby reducing the possibility of rust and mildew problems caused by residual moisture, and reducing the possibility of residual moisture secondary contamination of the test system.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. This application integrates the airtightness test component, cleanliness test component, and thermal resistance test component into the same device, changing the traditional decentralized test equipment model where each test is performed separately. This shortens the test time and improves the testing efficiency of the liquid cooling plate. It also avoids the need for frequent replacement of test pipes, effectively preventing damage to the liquid cooling plate joints. 2. This application implements pre-testing of the pure water tank water quality by setting up a wastewater treatment loop, ensuring the cleanliness of pipes 1 and 2, avoiding blockage of the liquid cooling plate flow channel or deviation of test results due to medium contamination, ensuring the accuracy of cleanliness test data, and achieving centralized wastewater recycling, thereby reducing the possibility of energy waste. 3. This application sets up a drying circuit. The setting of the drying circuit enables the high-temperature nitrogen to purge the gas circuit and the flow channel of the liquid cooling plate to be tested, thereby reducing the possibility of rust and mildew problems caused by residual moisture and reducing the possibility of residual moisture secondary contamination of the test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of this application.

[0024] Figure 2 It is a schematic diagram of the testing machine in the embodiment of the present application.

[0025] Figure 3 It is a schematic diagram of the principle of the airtight test in the embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of the principles of cleanliness test, thermal resistance test and wastewater treatment circuit in the embodiment of the present application.

[0027] Figure 5 It is a schematic diagram of the principle of the drying circuit in the embodiment of the present application.

[0028] Explanation of reference numerals: 1. cabinet; 101. platform; 102. barcode scanner; 103. display screen; 2. pure water tank; 21. liquid outlet 1; 22. liquid return port 1; 23. liquid return port 2; 24. liquid outlet 2; 3. pipeline 1; 31. test inlet pipe; 32. variable frequency circulation pump; 33. pneumatically controlled three-valve 1; 34. pneumatically controlled three-valve 3; 35. three-way valve 2; 4. pipeline 2; 41. test outlet pipe; 42 , three-way valve 1; 43, pneumatic three-way valve 2; 44, pneumatic three-way valve 4; 45, three-way valve 3; 46, solenoid valve 1; 47, three-way valve 4; 5, nitrogen cylinder; 6, pipeline 3; 61, four-way valve 1; 611, pipeline 4; 6111, stop valve 2; 62, stop valve 1; 7, cleanliness test component; 71, pipeline 8; 72, water quality sensor 1; 73, pipeline 5; 74, pneumatic ball valve; 75, Water quality sensor 2; 8. Thermal resistance test assembly; 81. Flow sensor; 82. Hot and cold integrated machine; 83. Temperature sensor 1; 84. Temperature sensor 2; 9. Airtightness test assembly; 91. Electric proportional valve; 92. Pressure sensor; 93. Standard liquid cold plate; 94. Differential pressure sensor; 10. Pipeline 6; 11. Pipeline 7; 12. Wastewater treatment circuit; 121. Wastewater tank; 1211. Water inlet 1; 1212. Water inlet 2; 1213. Drain; 122. Pipeline 9; 123. Pipeline 10; 124. Four-way valve 2; 125. Pipeline 11; 1251. Solenoid valve 2; 126. Pipeline 12; 127. Liquid discharge pump; 13. Drying circuit; 131. Air heater; 132. Pipeline 13; 133. Pipeline 14; 1331. Solenoid valve 3; 134. Humidity sensor. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-5 This application is described in further detail.

[0030] The embodiment of the present application discloses a multifunctional integrated liquid cooling plate testing machine.

[0031] Reference Figure 1 A multifunctional integrated liquid cooling plate testing machine includes a cabinet 1, on which is mounted a platform 101 for placing the liquid cooling plate to be tested, a barcode scanner 102 mounted on the cabinet 1, for recording the serial number of the liquid cooling plate to be tested, and a display screen 103 mounted on the outer surface of the cabinet 1, for displaying test information.

[0032] Reference Figure 1 and Figure 2 A pure water tank 2 for providing pure water medium is installed inside the cabinet 1, and a liquid level switch for monitoring the liquid level is installed inside the pure water tank 2 (not shown in the figure). The pure water tank 2 is externally connected to a pure water machine (not shown in the figure) to replenish the pure water medium. A liquid outlet 21 and a liquid return port 22 connected to the interior are installed on the pure water tank 2. A pipe 3 is installed on the liquid outlet 21. The pipe 3 extends to the inner wall of the cabinet 1 and is connected to a test inlet pipe 31. The test inlet pipe 31 is used to communicate with the liquid inlet joint of the liquid cold plate to be tested. A variable frequency circulation pump 32 for providing power for the flow of pure water medium is installed on the pipe 3. The specific principle of the variable frequency circulation pump 32 is the existing technology and will not be repeated here.

[0033] Reference Figure 1 and Figure 2 The return liquid port 1 22 is connected to a pipe 2 4, which extends to the inner wall of the cabinet 1 and is connected to a test outlet pipe 41. The test outlet pipe 41 is used to connect to the liquid outlet joint of the liquid cooling plate to be tested. Filters (not shown in the figure) are installed on both pipe 1 3 and pipe 2 4 to filter impurities in the pure water medium to ensure the purity of the pure water medium entering the liquid cooling plate.

[0034] Reference Figure 1 and Figure 2 A nitrogen cylinder 5 for providing nitrogen medium is installed inside the cabinet 1. The gas outlet of the nitrogen cylinder 5 is connected to a pipe 3 6. A pressure reducing valve (not shown in the figure) and an air filter (not shown in the figure) are installed in sequence along the flow direction of the medium on the side of the pipe 3 6 close to the nitrogen cylinder 5. The pressure reducing valve is used to prevent the air pressure inside the pipe 3 6 from being too high, and the air filter is used to filter dust and impurities in the nitrogen to ensure that the nitrogen entering the liquid cooling plate is clean.

[0035] Reference Figure 1 and Figure 2 Pipeline three 6 is connected to pipeline one 3 through four-way valve one 61, and pipeline four 611 is installed on the four-way valve one 61. The end of pipeline four 611 away from the four-way valve one 61 is connected to pipeline two 4 through three-way valve one 42. Cleanliness test assembly 7, thermal resistance test assembly 8 and airtightness test assembly 9 are installed on pipeline one 3, pipeline two 4, pipeline three 6 and pipeline four 611.

[0036] During the test, the liquid cooling plate to be tested is placed on the platform 101, and the information of the liquid cooling plate to be tested is recorded by the barcode scanning gun 102. Then the inspector connects the test inlet pipe 31 and the test outlet pipe 41 to the liquid cooling plate to be tested. At this time, pipe 1 3, pipe 2 4, pipe 3 6 and pipe 4 611 form a closed loop with the flow channel inside the test liquid cooling plate, and pure water medium or nitrogen medium is provided to the test liquid cooling plate through the pure water tank 2 or the nitrogen bottle 5. Then, the airtightness test component 9 is used to complete the airtightness test, the cleanliness test component 7 completes the cleanliness test, and the thermal resistance test component 8 completes the thermal resistance test. After the test is completed, the liquid cooling plate to be tested is disconnected from the test inlet pipe 31 and the test outlet pipe 41, and the test is completed. By integrating multiple test functions of airtightness, cleanliness, and thermal resistance into the same device, the mode of traditional distributed test equipment that requires each test to be performed separately is changed, the test time is shortened, and the test efficiency of the liquid cooling plate is improved; at the same time, frequent replacement of test pipes is avoided, effectively preventing damage to the liquid cooling plate joints.

[0037] Reference Figure 2 and Figure 3 The airtightness test assembly 9 includes an electric proportional valve 91 installed on pipeline three 6. The electric proportional valve 91 adjusts the gas pressure in pipeline three 6 through electrical signals. A stop valve 1 62 is installed on pipeline three 6, a gas-controlled three-valve 1 33 is installed on pipeline one 3, and a gas-controlled three-valve 2 43 is installed on pipeline two 4. The gas-controlled three-valve 1 33 and the gas-controlled three-valve 2 43 are connected to a pipeline six 10. The pipeline six 10 realizes the switching and isolation of the pure water medium circuit and the nitrogen circuit in pipeline one 3 and pipeline two 4 through the opening and closing states of the gas-controlled three-valve 1 33 and the gas-controlled three-valve 2 43. A pressure sensor 92 for monitoring pressure is installed on the side of pipeline two 4 close to the test outlet pipe 41.

[0038] Reference Figure 2 and Figure 3When conducting the test, the air tightness test of the liquid cooling plate to be tested is first carried out. When using the direct pressure method for testing, the tester switches the status of the gas-controlled three-valve one 33 and the gas-controlled three-valve two 43, so that the pipeline six 10 isolates the pure water medium circuit of pipeline one 3 and pipeline two 4. Then the tester opens the electrical proportional valve 91 and the stop valve one 62, and controls the gas pressure inside pipeline three 6 through the electrical proportional valve 91. The gas in the nitrogen cylinder 5 passes through pipeline three 6, pipeline four 611, pipeline one 3 and pipeline two 4, the test inlet pipe 31 and the test outlet pipe. Gas flows through pipe 41 into the flow channel of the liquid cooling plate to be tested. When the pressure sensor 92 detects that the pressure in the gas pipeline is stable, the tester controls shut-off valve 1 62 to close. At this time, pipe 3 6, pipe 4 611, pipe 1 3, pipe 2 4, test inlet pipe 31, test outlet pipe 41 and the flow channel of the liquid cooling plate to be tested form a closed gas loop. If there is a leak in the liquid cooling plate, the pressure inside the gas loop will decrease over time. The pressure change is monitored in real time by the pressure sensor 92 and compared with the standard pressure decay threshold to determine whether the air tightness is qualified.

[0039] Reference Figure 2 and Figure 3 In order to improve the accuracy and reliability of the airtightness test results, the airtightness test assembly 9 also includes a standard liquid cooling plate 93 installed inside the cabinet 1. A gas-controlled three-valve 34 is installed on the pipe 1 3, and a gas-controlled three-valve 44 is installed on the pipe 2 4. The gas-controlled three-valve 34 and the gas-controlled three-valve 4 44 are connected to each other with a pipe 7 11. The pipe 7 11 connects the liquid inlet and liquid outlet joints of the standard liquid cooling plate 93. A differential pressure sensor 94 is installed between the pipe 1 3 and the pipe 2 4. The differential pressure sensor 94 is used to measure the pressure difference between the standard liquid cooling plate 93 and the liquid cooling plate to be tested. A stop valve 2 6111 is installed on the pipe 4 611. By controlling the opening and closing of the stop valve 2 6111, the switching between the direct pressure method and the differential pressure method is achieved.

[0040] When using the differential pressure method for testing, the same method as the direct pressure method is used to stabilize the pressure in the gas pipeline, and then the stop valve 1 62 and the stop valve 2 6111 are closed. At this time, two gas circuits leading to the standard liquid cooling plate 93 and the liquid cooling plate to be tested are formed from the stop valve 2 6111 on the pipeline 4 611. If there is a leak in the liquid cooling plate, the gas pressure in the circuit where the liquid cooling plate to be tested is located will gradually decrease, while the pressure in the circuit where the standard liquid cooling plate 93 is located remains stable due to no leakage. The differential pressure sensor 94 monitors the pressure difference between the two circuits in real time, and determines whether the air tightness is qualified by comparing the pressure difference with the set threshold.

[0041] Reference Figure 2 and Figure 4The cleanliness test component 7 includes a pipe eight 71. The pure water tank 2 is provided with a liquid return port two 23 connected to the pipe eight 71. The pipe eight 71 is connected to the pipe one 3 through a three-way valve two 35. A water quality sensor one 72 is installed on the pipe one 3. The water quality sensor one 72 is connected in parallel with a pneumatic ball valve 74 through a pipe five 73. The pneumatic ball valve 74 is used to open and close the medium flow channel. A water quality sensor two 75 is installed on the pipe two 4. The water quality sensor one 72 and the water quality sensor two 75 are used to detect the conductivity, turbidity and pH value of the pure water medium passing through.

[0042] Reference Figure 2 and Figure 4 After the air tightness test, the inspectors conduct a cleanliness test. During the test, the directions of the stop valve 1 62, three-way valve 1 42, three-way valve 2 35, air-controlled three-valve 1 33, air-controlled three-valve 2 43, air-controlled three-valve 3 34 and air-controlled three-valve 4 44 are first switched so that the pure water medium can flow into the liquid cooling plate along the pipe 1 3 and the test inlet pipe 31, and then flow back through the test outlet pipe 41 and pipe 2 4. Subsequently, the variable frequency circulation pump 32 is started to drive the pure water medium to flow. During the flow of the medium, if the water quality sensor 1 72 detects that the pure water medium provided by the pure water tank 2 is unqualified, the flow direction of the three-way valve 2 35 is switched so that the unqualified pure water medium flows back to the inside of the pure water tank 2 through the pipe 1 3, the pipe 8 71 and the reflux port 2, and the pneumatic ball valve 74 is used to control the disconnection of the pipe 1 3 to prevent the unqualified water quality from flowing into the liquid cooling plate. When the water quality sensor 1 72 detects that the pure water quality is qualified, the pneumatic ball valve 74 is opened. At this time, the variable frequency circulation pump 32 drives the qualified pure water medium to flow into the liquid cooling plate. Then the pure water medium flows back to the pipe 2 4 and passes through the water quality sensor for water quality detection. The water quality data detected by the water quality sensor 2 75 is used to determine whether it is qualified.

[0043] Reference Figure 2 and Figure 4 A wastewater treatment circuit 12 is also provided inside the cabinet 1. The wastewater treatment circuit 12 includes a wastewater tank 121 installed in the cabinet 1. A water inlet 1211 and a water inlet 2 1212 are provided on the wastewater tank 121. A pipe 9 122 is installed in communication with the water inlet 1211. A liquid outlet 24 connected to the pipe 9 122 is provided on the pure water tank 2. A pipe 10 123 is installed in communication with the pipe 24 through a three-way valve 3 45. The three-way valve 3 45 is provided on the side of the water quality sensor 2 75 close to the pure water tank 2. A pipe 11 125 is installed in communication with the pipe 123 through a four-way valve 2 124. The pipe 11 125 is connected to the water inlet 2 1212.

[0044] Reference Figure 2 and Figure 4A solenoid valve 46 is installed on pipe 2 4, and the solenoid valve 46 is located on the side of the three-way valve 45 close to the pure water tank 2. A solenoid valve 2 1251 is installed on pipe 11 125. The opening and closing of pipe 2 4 and pipe 11 125 are controlled by solenoid valve 1 46 and solenoid valve 2 1251. When the water quality sensor 2 75 detects that the water quality of the pure water medium flowing back from the test outlet pipe 41 does not meet the standard, the inspection personnel closes the solenoid valve 46 and opens the solenoid valve 2 1251, and then switches the direction of the three-way valve 3 45. At this time, the unqualified pure water medium flows along pipe 2 4, pipe 10 123 and pipe 11 125 to the inside of the waste water tank 121, thereby realizing the timely recovery of the unqualified pure water medium and avoiding contamination of the pure water inside the pure water tank 2.

[0045] In addition, another method for detecting the water quality inside the pure water tank 2 is provided through the wastewater treatment loop 12. Specifically, when testing the water quality of the pure water tank 2, the testing personnel switch the directions of the air-controlled three-valve 1 33, the air-controlled three-valve 2 43 and the three-way valve 3 45, and then start the variable frequency circulation pump 32. The variable frequency circulation pump 32 extracts a portion of the pure water medium from the pure water tank 2 and flows along the pipe 1 3, the pipe 6 10, the pipe 2 4, the pipe 10 123 and the pipe 11 125 to the inside of the wastewater tank 121. During the flow of the pure water medium, if the water quality sensor 1 72 and the water quality sensor 2 75 detect that the pure water medium is qualified, it indicates that the water quality inside the pure water tank 2 is qualified and can be tested. If the water quality sensor 2 75 detects that the pure water medium is unqualified, the above steps are repeated to drain the pure water tank 2 multiple times until the water quality meets the standard. If the water quality continues to be unqualified, it indicates that the pure water inside the pure water tank 2 has been contaminated. The worker opens the manual valve to allow the unqualified water inside the pure water tank 2 to enter the waste water tank 121 through the pipe nine 122, thereby realizing the recycling of waste water. In this way, the water quality of the pure water tank 2 is pre-tested to ensure the cleanliness of the inside of the pipe one 3 and the pipe two 4, avoid the blockage of the liquid cooling plate flow channel or the deviation of the test results due to medium contamination, and ensure the accuracy of the cleanliness test data.

[0046] Reference Figure 2 and Figure 4 A drain outlet 1213 is provided on the wastewater tank 121, and a pipe 126 is installed in communication with the drain outlet 1213. A drainage pump 127 is installed on the pipe 126. The water outlet end of the pipe 126 extends to the interior of the sewage pool. A liquid level switch (not shown in the figure) is installed inside the wastewater tank 121. When the liquid level switch detects that the wastewater inside the wastewater tank 121 is saturated, the control system controls the drainage pump 127 to start, and the wastewater in the wastewater tank 121 is discharged from the pipe 126 to the interior of the sewage pool.

[0047] Reference Figure 2 and Figure 4The thermal resistance test assembly 8 includes a flow sensor 81, a heating and cooling integrated machine 82, and a temperature sensor 1 83, which are installed in sequence on the pipe 1 3 along the flow direction of the medium. The flow sensor 811 is located on the side of the three-way valve 3 45 away from the variable frequency circulation pump 32. The heating and cooling integrated machine 82 is used to control the medium temperature. A temperature sensor 2 84 is installed on the pipe 2 4. In the thermal resistance test, the differential pressure sensor 94 is used to measure the pressure difference between the test inlet pipe 31 and the test outlet pipe 41.

[0048] After the cleanliness test, the flow direction of each valve is maintained, the variable frequency circulation pump 32 is turned on, the flow sensor 81 monitors the medium flow in real time and feeds back to the control system to ensure that the flow is stable at the preset test value, the cooling and heating integrated machine 82 controls the temperature of the medium in pipe 1 3, the temperature sensor 1 83 detects the temperature of the medium before entering the liquid cooling plate, and then the medium flows into the liquid cooling plate through the test inlet pipe 31, and then flows back from pipe 2 4 through the test outlet pipe 41. The temperature sensor 2 84 collects the temperature data of the medium after it flows out of the liquid cooling plate. During this process, the differential pressure sensor 94 measures the pressure difference between the test inlet pipe 31 and the test outlet pipe 41 to obtain the thermal resistance data of the liquid cooling plate.

[0049] Reference Figure 2 and Figure 5 A drying circuit 13 is also provided inside the cabinet 1. The drying circuit 13 includes an air heater 131 installed on the pipe 3 6. The air heater 131 is used to heat nitrogen. The pipe 2 4 is connected to the pipe 13 132 through the three-way valve 4 47. The pipe 13 132 is connected to the pipe 11 125 through the four-way valve 2 124. The four-way valve 2 124 is connected to the pipe 14 133 for exhaust. The pipe 14 133 is installed with a humidity sensor 134 for monitoring humidity. The pipe 14 133 is installed with a solenoid valve 3 1331.

[0050] After the air tightness, cleanliness and thermal resistance tests are completed, pure water medium impurities will remain in the gas circuit part of pipe 1 3 and pipe 2 4 and inside the liquid cooling plate to be tested. At this time, the air heater 131 is started and nitrogen is used for heating. When the nitrogen temperature rises to the preset temperature of 80°C, the electric proportional valve 91 and the stop valve are opened, and the directions of the air-controlled three-valve 3 34, the air-controlled three-valve 4 44 and the three-way valve 4 47 are switched, so that the high-temperature nitrogen passes through pipe 3 6, pipe 1 3, the test inlet pipe 31, the liquid cooling plate to be tested, the test outlet pipe 41, pipe 2 4 and pipe 13 132 in sequence. Then, the high-temperature nitrogen blows the remaining pure water medium along pipe 11 125 into the wastewater tank 121. When the humidity sensor 134 detects that the gas humidity inside the flow pipe 14 133 meets the standard, the solenoid valve 3 1331 is opened to discharge the gas. In this way, the liquid cooling plate to be tested and the inside of the gas circuit are dried, reducing the possibility of residual moisture secondary contamination of the test system.

[0051] The implementation principle of the multifunctional integrated liquid cooling plate tester of the embodiment of the present application is as follows: during the test, the liquid cooling plate to be tested is placed on the platform 101, and the information of the liquid cooling plate to be tested is recorded by the barcode scanning gun 102. Then the tester connects the test inlet pipe 31 and the test outlet pipe 41 to the liquid cooling plate to be tested. At this time, the pipe 1 3, the pipe 2 4, the pipe 3 6 and the pipe 4 611 form a closed loop with the flow channel inside the test liquid cooling plate. Pure water medium or nitrogen medium is provided to the test liquid cooling plate through the pure water tank 2 or the nitrogen bottle 5. Then, the gas is used in sequence to test the liquid cooling plate. The air tightness test component 9 completes the air tightness test, the cleanliness test component 7 completes the cleanliness test, and the thermal resistance test component 8 completes the thermal resistance test. After the test is completed, the liquid cooling plate to be tested is disconnected from the test inlet pipe 31 and the test outlet pipe 41. The test is completed. By integrating multiple test functions such as air tightness, cleanliness, and thermal resistance into the same device, the mode in which traditional distributed test equipment needs to perform each test separately is changed, the test time is shortened, and the test efficiency of the liquid cooling plate is improved; at the same time, frequent replacement of test pipes is avoided, effectively preventing damage to the liquid cooling plate joints.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A multifunctional integrated liquid cooling plate tester, comprising a cabinet (1), wherein the cabinet (1) is provided with a platform (101) for placing the liquid cooling plate to be tested, and the cabinet (1) is provided with a test inlet pipe (31) and a test outlet pipe (41) for connecting to the liquid cooling plate, characterized in that: A pure water tank (2) and a nitrogen bottle (5) are provided inside the cabinet (1). A liquid outlet (21) and a liquid return port (22) are provided on the pure water tank (2). The liquid outlet (21) is connected to the test inlet pipe (31) through a pipe (3). The liquid return port (22) is connected to the test outlet pipe (41) through a pipe (4). A variable frequency circulation pump (32) is provided on the pipe (3). The nitrogen bottle (5) is connected to a pipe (6). ), the pipeline three (6) is connected to the pipeline one (3) through the stop valve one (62), the stop valve one (62) is connected to the pipeline four (611), the pipeline four (611) is connected to the pipeline two (4) through the three-way valve one (42), and the pipeline one (3), the pipeline two (4), the pipeline three (6) and the pipeline four (611) are provided with a cleanliness test component (7), a thermal resistance test component (8) and an airtightness test component (9).

2. The multifunctional integrated liquid cooling plate testing machine according to claim 1, characterized in that: The cleanliness test assembly (7) includes a water quality sensor 1 (72) and a water quality sensor 2 (75). The water quality sensor 1 (72) is arranged on the pipeline 1 (3) and is connected in parallel with a pneumatic ball valve (74) through the pipeline 5 (73). The pneumatic ball valve (74) is used to open and close the pure water medium flow channel. The water quality sensor 2 (75) is arranged on the pipeline 2 (4). The water quality sensor 1 (72) and the water quality sensor 2 (75) are used to detect the conductivity, turbidity and pH value of the pure water medium.

3. The multifunctional integrated liquid cooling plate testing machine according to claim 2, characterized in that: The thermal resistance test assembly (8) comprises a flow sensor (81), a heating and cooling integrated machine (82) and a temperature sensor (83) which are sequentially arranged on the first pipe (3) along the flow direction of the medium, the heating and cooling integrated machine (82) is used to control the temperature of the medium, the second pipe (4) is provided with a temperature sensor (84), a differential pressure sensor (94) is installed between the first pipe (3) and the second pipe (4), and the differential pressure sensor (94) is used to measure the pressure difference between the test inlet pipe (31) and the test outlet pipe (41).

4. The multifunctional integrated liquid cooling plate testing machine according to claim 1, characterized in that: The airtightness test assembly (9) comprises an electric proportional valve (91) arranged on the pipeline three (6), the electric proportional valve (91) is used to adjust the gas pressure in the pipeline three (6), the pipeline three (6) is provided with a stop valve one (62), the pipeline one (3) and the pipeline two (4) are connected by a pipeline six (10) through a gas-controlled three-valve one (33) and a gas-controlled three-valve two (43), and a pressure sensor (92) for monitoring pressure is provided on the side of the pipeline two (4) close to the test outlet pipe (41).

5. The multifunctional integrated liquid cooling plate testing machine according to claim 4, characterized in that: The airtight test assembly (9) further includes a standard liquid cooling plate (93), and a pipe seven (11) is installed between the pipe one (3) and the pipe two (4) via a gas-controlled three-valve three (34) and a gas-controlled three-valve four (44). A stop valve two (6111) is provided on the pipe four (611), and the pipe seven (11) short-circuits the standard liquid cooling plate (93). The differential pressure sensor (94) is used to monitor the pressure difference between the liquid cooling plate to be tested and the standard liquid cooling plate (93).

6. The multifunctional integrated liquid cooling plate testing machine according to claim 2, characterized in that: The pure water tank (2) is provided with a second liquid return port (23), and the cleanliness test assembly (7) further comprises an eighth pipe (71) in communication with the second liquid return port (23), the eighth pipe (71) being in communication with the first pipe (3) via a second three-way valve (35), and the second three-way valve (35) being located between the variable frequency circulation pump (32) and the flow sensor (81).

7. The multifunctional integrated liquid cooling plate testing machine according to claim 4, characterized in that: The pure water tank (2) is provided with a second liquid outlet (24), and a wastewater treatment circuit (12) is provided in the cabinet (1). The wastewater treatment circuit (12) includes a wastewater tank (121) provided in the cabinet (1), and the wastewater tank (121) is provided with a first water inlet (1211), a second water inlet (1212) and a drain (1213). The first water inlet (1211) is connected to the second liquid outlet (24) via a ninth pipe (122), and the second water inlet (1212) is connected to the drain (1213). (4) is connected to a pipe ten (123) via a three-way valve three (45), the pipe ten (123) is connected to a pipe eleven (125) via a four-way valve two (124), the pipe eleven (125) is connected to the water inlet two (1212), the drain outlet (1213) is connected to a pipe twelve (126), a drainage pump (127) is installed on the pipe twelve (126), and the water outlet end of the pipe twelve (126) extends to the interior of the sewage pool.

8. The multifunctional integrated liquid cooling plate testing machine according to claim 7, characterized in that: A drying circuit (13) is provided in the cabinet (1), and the drying circuit (13) includes an air heater (131) provided on the pipe three (6); a pipe thirteen (132) is connected to the pipe two (4) via a three-way valve four (47); the pipe thirteen (132) is connected to the pipe eleven (125) via a four-way valve two (124); a pipe fourteen (133) for exhaust is connected to the four-way valve two (124); a humidity sensor (134) for monitoring humidity is provided on the pipe fourteen (133); and a solenoid valve three (1331) is provided on the pipe fourteen (133).

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