Liquid cooling plate flow resistance and conductivity testing device and control method thereof

Abstract

The invention relates to a liquid cooling plate flow resistance and conductivity test device and a control method thereof, the device comprises a temperature control module, a deionization circulation module, a test main circulation module and a to-be-tested device and tool module, the temperature control module, the deionization circulation module, the test main circulation module and the to-be-tested device and tool module are connected in sequence; the deionization circulation module is used for continuously carrying out replacement treatment on a test medium in a liquid storage water tank in the test main circulation module through a circulation guide pipe path. According to the overall structure provided by the invention, 5-10 test cold plates can be simultaneously connected in series for testing, so that the problem of low efficiency during testing of a single test cold plate is solved, and the multi-flow-path design and the flow control design requirement of test equipment during parallel testing of a plurality of test cold plates are met; the method solves the problems that each process needs a set of equipment and equipment switching is time-consuming, and has the advantages of low equipment cost, automatic test process, short time-consuming test flow, high test efficiency and the like.

Description

Technical Field

[0001] The present application relates to the technical field of liquid cooling plates, and in particular to a liquid cooling plate flow resistance and conductivity testing device and a control method thereof. Background Art

[0002] Energy storage systems are divided into two types according to the power transmission technology route: low-voltage boost technology (including centralized, string, intelligent string, distributed, distributed energy blocks, etc.) and high-voltage cascade technology. The energy storage battery liquid cooling plate used in the low-voltage boost technology route mainly included air tightness, flow resistance and other tests in the past; with the penetration of high-voltage cascade technology, the liquid cooling plate has higher requirements for conductivity after leaving the factory, and the cold plate needs to be flushed with pure water and dielectric conductivity tests. The current test equipment has the problem of separate processes for testing flow resistance, pure water flushing, and conductivity testing, which leads to high cost of test equipment and time-consuming test processes. Therefore, we proposed a liquid cooling plate flow resistance and conductivity test device and its control method. Summary of the invention

[0003] The present application provides a grate bed for a grate cooler to solve the above-mentioned problems.

[0004] The present application provides a liquid cooling plate flow resistance and conductivity testing device, comprising:

[0005] A temperature control module, a deionization circulation module, a test main circulation module, and a device to be tested and a tooling module, wherein the temperature control module, the deionization circulation module, the test main circulation module, the device to be tested and the tooling module are sequentially connected to each other;

[0006] The deionization circulation module continuously replaces the test medium in the liquid storage water tank through the circulation conduit path in the test main circulation module, and a temperature control module is added to the path of the deionization circulation module;

[0007] The test main circulation module provides the test medium in the liquid storage tank to the equipment to be tested and the tooling module.

[0008] Preferably, the test main circulation module uses a liquid storage tank connected to a liquid supply pipeline, and the liquid supply pipeline is sequentially provided with a main circulation water pump, a first filter, a flow meter 1 and a check valve, and the liquid supply pipeline connects the equipment to be tested and the test cold plate group in the tooling module.

[0009] Preferably, the liquid supply pipeline is also connected to a purge pipeline at the outlet of the check valve, the end of the purge pipeline is connected to a compressed air supply mechanism, and a solenoid valve is provided on the purge pipeline.

[0010] Preferably, the deionization circulation module is connected to the liquid storage tank through a deionization pipeline loop, and the deionization pipeline is connected to the deionization water pump, the first manual ball valve, the deionization tank, the second manual ball valve, the second filter, the flow meter 2, the evaporator and the electric heater in sequence according to the liquid flow direction.

[0011] Preferably, the temperature control module includes a fan, a condenser, a compressor, an electronic expansion valve, an evaporator and an electric heater, a pipe between the inlet and outlet of the evaporator connects the compressor, the condenser and the electronic expansion valve, and the fan is arranged on the front side of the condenser.

[0012] Preferably, the equipment to be tested and the tooling module are composed of multiple test cold plates, and the multiple test cold plates form a test cold plate group, and the multiple test cold plates are connected in series through pipes, and the pipes between each of the test cold plates are also connected to a liquid storage tank through a drain pipe, and a drain valve is provided on the drain pipe, and a liquid level switch and an isolation baffle are provided inside the liquid storage tank.

[0013] A method for controlling a liquid cooling plate flow resistance and conductivity testing device comprises the following steps:

[0014] Step 1: N test cold plates are all connected to the test quick sockets;

[0015] Step 2: The main circulating water pump is started, and the main circulating water pump is frequency-controlled by PLC so that the flow rate monitored by flow meter 1 reaches the target value F1, and the flow data is stable for 10S;

[0016] Step 3: Record the inlet and outlet pressure data P1 to Pn+1 of the test cold plate, and the PLC calculates the inlet and outlet pressure difference value of each test cold plate △Pn=Pn+1-Pn. The test data is recorded for 60s and the average value is taken for calculation;

[0017] Step 4: Determine the value of △Pn of each test cold plate and the set required value cold plate △P, that is, △Pn-△P≤0. If it is true, then determine the conductivity Q1 of the test medium after flushing the test cold plate. If Q1 is less than the target conductivity Q for 300s, if it is true again, the liquid flushed test cold plate is qualified, and the PLC controls the touch screen to prompt;

[0018] △Pn-△P≤0, if not, the buzzer sounds, indicating that the flow resistance test of the Nth test cold plate is unqualified, and then the conductivity Q1 of the test medium after flushing the test cold plate is determined. If Q1 is greater than the target conductivity Q for 300s, the cycle continues and the test fails;

[0019] Step 5. After the test is completed, stop the main circulation water pump, open the branch solenoid valve of the compressed air supply mechanism, and introduce compressed air into the test cold plate to blow the residual test medium back into the infusion water tank for 60 seconds. Then close the solenoid valve, remove the quick-plug interface and the test cold plate interface, and remove the tested test cold plate.

[0020] Preferably, the requirements for controlling the conductivity of the liquid inside the infusion water tank extracted by the main circulation water pump include:

[0021] The conductivity monitoring value Q2 in the storage water tank is ≥ the set value QK, which lasts for the equipment time. The deionization circulation water pump is started. The deionization circulation water pump draws a certain flow of test medium from the storage water tank, which is continuously purified by the deionization tank and then discharged into the storage water tank again. The conductivity monitoring value Q2 in the storage water tank is < the set value QK + the residual value Y, which lasts for the set time.

[0022] Preferably, the requirement for controlling the temperature of the liquid inside the liquid storage tank includes the following steps:

[0023] Step 6: The internal temperature of the liquid storage tank | monitoring value T1-set value TK | ≥ deviation set value △TK, last for 5 seconds, start the deionization circulation water pump, and enter the temperature control mode;

[0024] Step 7: If the monitoring value T1-set value TK>0, the medium temperature is high and needs to be cooled down. The compressor, condensing fan, and electronic expansion valve components in the temperature control module are set to run;

[0025] If the monitoring value T1-set value TK<0, the medium temperature is low and needs to be heated up, and the PCT heater starts running;

[0026] Step 8: Draw a certain flow rate of test medium from the liquid storage tank, discharge it into the liquid storage tank after temperature control, and the internal temperature of the liquid storage tank | monitoring value T1-set value TK | < deviation set value △TK, which lasts for 60 seconds, and the compressor, condensing fan, electronic expansion valve device refrigeration module equipment or PCT heater equipment stops.

[0027] Preferably, the demand for liquid temperature control and conductivity control in the liquid storage water tank ends and lasts for 60 seconds, the deionized circulating water pump stops, and pure ethylene glycol and pure water are freely mixed in the liquid storage water tank.

[0028] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0029] The overall structure provided by the embodiment of the present application is a liquid cold plate series flow resistance test. According to the difference in the flow resistance and maximum pressure resistance parameters of the test cold plate, 5-10 test cold plates can be connected in series at the same time for testing, which solves the low efficiency problem when testing a single test cold plate, and also solves the multi-flow path design of the test equipment and its flow control design requirements when multiple test cold plates are tested in parallel;

[0030] The cold plate flow resistance test, liquid cold plate flushing, liquid cold plate medium conductivity test, and liquid cold plate medium drain test process equipment integration and automation solve the problem that each process requires a set of equipment in the past, and the equipment switching is time-consuming. It has the advantages of low equipment cost, automated test process, short test process time, and high test efficiency.

[0031] In the past, the test of flow resistance required the use of finished ethylene glycol solution, and the test of cold plate flushing and conductivity test required the use of pure water, which required the two media to be switched. The present invention uses pure ethylene glycol and pure water in the liquid storage water tank for free mixing, and directly uses the ethylene glycol mixed liquid to perform the two test steps of flow resistance test and cold plate flushing. In view of the high conductivity problem of conventional ethylene glycol, a deionization cycle is added to clean the anions and cations in the liquid storage tank medium in real time to ensure that the medium conductivity meets the required value. This saves the investment in test equipment, saves the medium loss in the switching process, and saves pure water preparation equipment.

[0032] Some high-demand test scenarios require that the test medium temperature be constant. This design is equipped with a test medium temperature control module. The control module has cooling and heating functions, which can control the medium temperature of the liquid storage tank to remain constant.

[0033] After the test is completed, all test liquid cooling plates and test tooling pipelines have the function of cleaning and recycling the test medium to avoid residue and medium loss. Because ethylene glycol is used as the final test medium, the liquid cooling plate is prevented from freezing in low-temperature areas and damaging the cold plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0036] Figure 1 It is a schematic diagram of the overall process structure of the present invention;

[0037] Figure 2This is a flow chart of a control method of a liquid cooling plate flow resistance and conductivity testing device of the present invention;

[0038] Figure 3 It is a flow chart of the requirements for conductivity control of the present invention;

[0039] Figure 4 It is a demand flow chart of liquid temperature control of the present invention;

[0040] Figure 5 It is a flow chart of the device stop of the present invention. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0042] Various embodiments of the present application may exist in the form of a range. It should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a hard limit to the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single values ​​within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which are applicable regardless of the range. In addition, whenever a numerical range is indicated in the present application, it is meant to include any quoted numbers (fractions or integers) within the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application, etc., can be purchased from the market or can be prepared by existing equipment.

[0043] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the present application, the terms "include", "comprise", etc. refer to "including but not limited to". In the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In the present application, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular items or plural items. For example, "at least one of a, b, or c" or "at least one of a, b and c" can both mean: a, b, c, ab, i.e. a and b, ac, bc or abc, where a, b, c can be single or plural, respectively.

[0044] like Figure 1-Figure 5 As shown: The embodiment of the present application provides a liquid cooling plate flow resistance and conductivity testing device, comprising:

[0045] A temperature control module, a deionization circulation module, a test main circulation module, and a device to be tested and a tooling module, wherein the temperature control module, the deionization circulation module, the test main circulation module, the device to be tested and the tooling module are sequentially connected to each other;

[0046] The deionization circulation module continuously replaces the test medium in the liquid storage water tank through the circulation conduit path in the test main circulation module, and a temperature control module is added to the path of the deionization circulation module;

[0047] The test main circulation module provides the test medium in the liquid storage tank to the equipment to be tested and the tooling module.

[0048] Specifically: the main circulation water pump of the main circulation module is used to provide power, and the cooling medium is extracted from the liquid storage tank, passes through the first filter, flow meter 1, check valve, and then to the cold plate equipment to be tested. Finally, the medium returns to the liquid storage tank, and a conductivity sensor is set at the inlet of the liquid storage tank;

[0049] like Figure 1 As shown: the test main circulation module adopts a liquid storage tank connected to a liquid supply pipeline, and the liquid supply pipeline is provided with a main circulation water pump, a first filter, a flow meter 1 and a check valve in sequence, and the liquid supply pipeline connects the device to be tested and the test cold plate group in the tooling module.

[0050] Specifically: the main circulating water pump is responsible for providing flow and head. The main circulating water pump can be operated at variable frequency through the frequency converter. The main circulating water pump can be controlled by the PLC controller of the test device to achieve variable frequency regulation, so that the output flow is the set test target flow and the output pressure does not exceed the maximum test pressure of the first test cold plate;

[0051] The first filter is used to filter impurities such as rigid particles that may exist in the test equipment to prevent impurities from entering the test cold plate to be tested and causing damage to the test product;

[0052] Flow meter 1 is used to monitor the flow of the medium entering the cold plate to be tested. The data is uploaded to the PLC in real time and stored. When the PLC detects that the test flow meets the target value and lasts for the target time, it will start the flow resistance test of the test cold plate;

[0053] Check valve: It has two functions: 1. Prevent the high-level test medium from flowing back to the liquid storage tank, reducing the test time loss during the next test; 2. When the test device enters the blowing and draining process, the check valve prevents the gas from entering the main circulation pipeline, and all air flows to the equipment and tooling to be tested;

[0054] The liquid storage tank is used to store the test medium. A baffle of a certain height is set in the middle of the liquid storage tank to separate the medium into two areas. The side wall of the liquid storage tank is designed with an interface for the main circulation loop. The interface can be designed with a multi-channel expansion interface. The interface is designed on both sides of the liquid storage tank. The outlet side is the outflowing low conductivity medium, and the inlet side is the inflowing high conductivity medium after the flushing liquid cold plate. The side wall of the liquid storage tank is also designed with an interface for the deionization loop. The outlet side is the outflowing high conductivity medium, and the inlet side is the inflowing low conductivity medium that has been deionized. A liquid level switch is designed in the liquid storage tank. When the medium in the liquid storage tank is lower than a certain liquid level, the liquid level switch is triggered to provide a signal to the PLC to generate a low liquid level alarm prompt. Temperature and conductivity sensors are set in the liquid storage tank to monitor the temperature and conductivity parameters of the medium entering the main circulation part.

[0055] like Figure 1 As shown: the liquid supply pipeline is also connected to a purge pipeline at the outlet of the check valve, the end of the purge pipeline is connected to a compressed air supply mechanism, and a solenoid valve is provided on the purge pipeline.

[0056] like Figure 1 As shown: the deionization circulation module is connected to the liquid storage tank through a deionization pipeline loop, and the deionization pipeline is connected to the deionization water pump, the first manual ball valve, the deionization tank, the second manual ball valve, the second filter, the flow meter 2, the evaporator and the electric heater in sequence according to the liquid flow direction.

[0057] Specifically: the deionization tank is filled with nuclear-grade non-regenerative resin, which has large adsorption capacity, high temperature resistance and high flow rate, and is specially used for the removal of trace ions. The deionization tank adopts the mixed bed ion exchange method, and the anion and cation exchange resins are placed in the deionization tank. Before operation, they are evenly mixed to form a multi-stage complex bed with countless anion and cation exchange resins arranged in an interlaced manner. The anions and cations of the salts contained in the medium pass through the resin and are exchanged by the resin to obtain highly pure water;

[0058] The evaporator adopts a plate heat exchanger, and the cooling medium circulating in the deionization branch exchanges heat with the refrigerant in the temperature control module to achieve the purpose of cooling the medium;

[0059] The electric heater is used to heat the medium.

[0060] like Figure 1 As shown: the temperature control module includes a fan, a condenser, a compressor, an electronic expansion valve, an evaporator and an electric heater, the compressor, the condenser and the electronic expansion valve are connected by pipes between the inlet and outlet of the evaporator, and the fan is arranged on the front side of the condenser.

[0061] like Figure 1 As shown: the equipment to be tested and the tooling module are composed of multiple test cold plates, and the multiple test cold plates form a test cold plate group, and the multiple test cold plates are connected in series through pipes, and the pipes between each of the test cold plates are also connected to the liquid storage tank through a drain pipe, and the drain pipe is provided with a drain valve, and the interior of the liquid storage tank is provided with a liquid level switch and an isolation baffle.

[0062] The test cold plates in the equipment to be tested and the tooling modules are equipped with pressure sensors. The pressure sensors are located as close as possible to the quick-plug interface of each test cold plate to test the inlet and outlet pressures of each test cold plate. Through PLC calculation, the pressure difference of each test cold plate under the rated flow rate of the test can be obtained. The PLC compares it with the designed pressure difference value to determine whether the flow resistance test of the test cold plate is qualified.

[0063] A method for controlling a liquid cooling plate flow resistance and conductivity testing device comprises the following steps:

[0064] Step 1: N test cold plates are all connected to the test quick sockets;

[0065] Step 2: The main circulating water pump is started, and the main circulating water pump is frequency-controlled by PLC so that the flow rate monitored by flow meter 1 reaches the target value F1, and the flow data is stable for 10 seconds;

[0066] Step 3: Record the test cold plate inlet and outlet pressure data P1 to P n+1 , PLC calculates the inlet and outlet pressure difference value △P of each test cold plate n =P n+1 -Pn , the test data is recorded for 60 seconds and the average value is taken for calculation;

[0067] Step 4: Determine the △P of each test cold plate n The value of the cold plate △P is the same as the set value, that is, △P n -△P≤0, if it is established, the conductivity Q1 of the test medium after flushing the test cold plate is determined. If Q1 is less than the target conductivity Q for 300s, if it is established again, the liquid flushed test cold plate is qualified, and the PLC controls the touch screen to prompt;

[0068] △P n -△P≤0, if not, the buzzer sounds, indicating that the flow resistance test of the Nth test cold plate is unqualified, and then the conductivity Q1 of the test medium after flushing the test cold plate is determined. If Q1 is greater than the target conductivity Q for 300s, the cycle continues and the test fails;

[0069] Step 5. After the test is completed, stop the main circulation water pump, open the branch solenoid valve of the compressed air supply mechanism, and introduce compressed air into the test cold plate to blow the residual test medium back into the infusion water tank for 60 seconds. Then close the solenoid valve, remove the quick-plug interface and the test cold plate interface, and remove the tested test cold plate.

[0070] like Figure 3 As shown: The requirements for controlling the conductivity of the liquid inside the infusion water tank extracted by the main circulation water pump include:

[0071] Conductivity monitoring value Q2 in the liquid storage tank ≥ set value Q K , and continue for 5s. Start the deionized circulating water pump. The deionized circulating water pump extracts a certain flow of test medium from the liquid storage tank, which is continuously purified by the deionized tank and then discharged into the liquid storage tank again. The conductivity monitoring value Q2 in the liquid storage tank is less than the set value Q K + margin value Y, lasting 60s.

[0072] like Figure 4 As shown: the requirement for controlling the temperature of the liquid inside the liquid storage tank includes the following steps:

[0073] Step 6: Internal temperature of liquid storage tank | monitoring value T1-set value T K ∣≥Deviation setting value△T K , lasting for 5 seconds, starting the deionized water circulation pump and entering the temperature control mode;

[0074] Step 7: If the monitoring value T1-set value T K >0, the medium temperature is high and needs to be cooled down. The compressor, condensing fan and electronic expansion valve components in the temperature control module are set to run;

[0075] If the monitoring value T1-set value TK <0, the medium temperature is low and needs to be heated up, and the PCT heater starts running;

[0076] Step 8: Extract a certain flow of test medium from the liquid storage tank, and discharge it into the liquid storage tank after temperature control. The internal temperature of the liquid storage tank | monitoring value T1-set value TK | < deviation set value △T K , lasting for 60 seconds, the compressor, condensing fan, electronic expansion valve device refrigeration module equipment or PCT heater equipment stops.

[0077] The demand for liquid temperature control and conductivity control in the liquid storage water tank ends and lasts for 60 seconds, the deionized circulating water pump stops, and pure ethylene glycol and pure water are freely mixed in the liquid storage water tank.

[0078] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. It will be apparent to those skilled in the art that various modifications to these embodiments are possible, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features applied for by the present application.

Claims

1. A liquid cooling plate flow resistance and conductivity testing device, characterized in that: include: A temperature control module, a deionization circulation module, a test main circulation module, and a device to be tested and a tooling module, wherein the temperature control module, the deionization circulation module, the test main circulation module, the device to be tested and the tooling module are sequentially connected to each other; The deionization circulation module continuously replaces the test medium in the liquid storage water tank through the circulation conduit path in the test main circulation module, and a temperature control module is added to the path of the deionization circulation module; The test main circulation module provides the test medium in the liquid storage tank to the equipment to be tested and the tooling module.

2. A liquid cooling plate flow resistance and conductivity testing device according to claim 1, characterized in that: The test main circulation module adopts a liquid storage tank connected to a liquid supply pipeline, and the liquid supply pipeline is sequentially provided with a main circulation water pump, a first filter, a flow meter 1 and a check valve, and the liquid supply pipeline connects the device to be tested and the test cold plate group in the tooling module.

3. A liquid cooling plate flow resistance and conductivity testing device according to claim 2, characterized in that: The liquid supply pipeline is also connected to a purge pipeline at the outlet of the check valve, the end of the purge pipeline is connected to a compressed air supply mechanism, and a solenoid valve is arranged on the purge pipeline.

4. A liquid cooling plate flow resistance and conductivity testing device according to claim 1, characterized in that: The deionization circulation module is connected to the liquid storage tank through a deionization pipeline loop, and the deionization pipeline is connected to the deionization water pump, the first manual ball valve, the deionization tank, the second manual ball valve, the second filter, the flow meter 2, the evaporator and the electric heater in sequence according to the liquid flow direction.

5. A liquid cooling plate flow resistance and conductivity testing device according to claim 1, characterized in that: The temperature control module includes a fan, a condenser, a compressor, an electronic expansion valve, an evaporator and an electric heater. The compressor, the condenser and the electronic expansion valve are connected by a pipeline between the inlet and outlet of the evaporator. The fan is arranged at the front side of the condenser.

6. A liquid cooling plate flow resistance and conductivity testing device according to claim 1, characterized in that: The equipment to be tested and the tooling module are composed of multiple test cold plates, and the multiple test cold plates form a test cold plate group, and the multiple test cold plates are connected in series through pipes. The pipes between each of the test cold plates are also connected to a liquid storage tank through a drain pipe, and a drain valve is provided on the drain pipe. A liquid level switch and an isolation baffle are provided inside the liquid storage tank.

7. A control method for a liquid cooling plate flow resistance and conductivity test device, characterized in that: Includes the following steps: Step 1: N test cold plates are all connected to the test quick sockets; Step 2: The main circulating water pump is started, and the main circulating water pump is frequency-controlled by PLC so that the flow rate monitored by flow meter 1 reaches the target value F1, and the flow data is stable for 10 seconds; Step 3: Record the test cold plate inlet and outlet pressure data P1 to P n+1 , PLC calculates the inlet and outlet pressure difference value △P of each test cold plate n =P n+1 -P n , the test data is recorded for 60 seconds and the average value is taken for calculation; Step 4: Determine the △P of each test cold plate n The value of the cold plate △P is the same as the set value, that is, △P n -△P≤0, if it is established, the conductivity Q1 of the test medium after flushing the test cold plate is determined. If Q1 is less than the target conductivity Q for 300s, if it is established again, the liquid flushed test cold plate is qualified, and the PLC controls the touch screen to prompt; △P n -△P≤0, if not, the buzzer sounds, indicating that the flow resistance test of the Nth test cold plate is unqualified, and then the conductivity Q1 of the test medium after flushing the test cold plate is determined. If Q1 is greater than the target conductivity Q for 300s, the cycle continues and the test fails; Step 5. After the test is completed, stop the main circulation water pump, open the branch solenoid valve of the compressed air supply mechanism, and introduce compressed air into the test cold plate to blow the residual test medium back into the infusion water tank for 60 seconds. Then close the solenoid valve, remove the quick-plug interface and the test cold plate interface, and remove the tested test cold plate.

8. A method for controlling a liquid cooling plate flow resistance and conductivity testing device according to claim 7, characterized in that: The requirements for controlling the conductivity of the liquid inside the infusion water tank extracted by the main circulation water pump include: Conductivity monitoring value Q2 in the liquid storage tank ≥ set value Q K , and start the deionized circulating water pump for the set time. The deionized circulating water pump draws a certain flow of test medium from the liquid storage tank, which is continuously purified by the deionized tank and then discharged into the liquid storage tank again. The conductivity monitoring value Q2 in the liquid storage tank is less than the set value Q K + margin value Y, lasts for the set time.

9. A method for controlling a liquid cooling plate flow resistance and conductivity testing device according to claim 7, characterized in that: The requirement for controlling the temperature of the liquid inside the liquid storage tank includes the following steps: Step 6: Internal temperature of the liquid storage tank | monitoring value T1-set value T K ∣≥Deviation setting value△T K , lasting for 5 seconds, starting the deionized water circulation pump and entering the temperature control mode; Step 7: If the monitoring value T1-set value T K >0, the medium temperature is high and needs to be cooled down. The compressor, condensing fan and electronic expansion valve components in the temperature control module operate according to the settings; If the monitoring value T1-set value TK<0, the medium temperature is low and needs to be heated up, and the PCT heater starts running; Step 8: Extract a certain flow of test medium from the liquid storage tank, and discharge it into the liquid storage tank after temperature control. The internal temperature of the liquid storage tank is T1-the set value T K ∣<Deviation setting value △T K , lasting for 60 seconds, the compressor, condensing fan, electronic expansion valve device refrigeration module equipment or PCT heater equipment stops.

10. A method for controlling a liquid cooling plate flow resistance and conductivity testing device according to claim 9, characterized in that: The demand for liquid temperature control and conductivity control in the liquid storage water tank ends and lasts for 60 seconds, the deionized circulating water pump stops, and pure ethylene glycol and pure water are freely mixed in the liquid storage water tank.

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