CN-121994643-A - Device and method for testing air content of liquid cooling system, electronic equipment and medium

CN121994643ACN 121994643 ACN121994643 ACN 121994643ACN-121994643-A

Abstract

The invention belongs to the technical field of thermal management, and particularly relates to a device and a method for testing air content of a liquid cooling system, electronic equipment and a medium. The testing device comprises a pressure tank, wherein the pressure tank is connected with a connecting pipe, an exhaust pipe and an air inlet pipe, a first regulating valve, an exhaust pressure stabilizing component and an air flowmeter are sequentially arranged on the exhaust pipe, the air inlet pipe is used for connecting an external air source, a second regulating valve is arranged on the air inlet pipe, a second pressure sensor and a temperature sensor are arranged on the pressure tank, the pressure tank is used for being connected with a tested liquid cooling system through the connecting pipe, and a third regulating valve and a third pressure sensor are arranged on the connecting pipe, which is connected with the tested liquid cooling system, of the pressure tank. Based on the principle that the expansion coefficients of liquid and gas are different, the invention can rapidly and nondestructively complete the gas content test of the liquid cooling system, can deeply decouple the test precision from the individual difference of the internal volume of the cooling system, and has better adaptability than a filling quantity metering method.

Inventors

HE KAI
DOU ZECHUN
LI HUA
Ning Yupiao
LUO QIAN
XIE YONGQING
WU HUI
Kuang jia

Assignees

株洲中车时代电气股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241104

Claims (10)

1. A testing device for the air content of a liquid cooling system is characterized by comprising a pressure tank (10), wherein the pressure tank (10) is connected with a connecting pipe (2), an exhaust pipe and an air inlet pipe, a first regulating valve (6), an exhaust pressure stabilizing component and an air flowmeter (4) are sequentially arranged on the exhaust pipe close to the pressure tank (10), the air inlet pipe is used for being connected with an external air source, a second regulating valve (9) is arranged on the air inlet pipe, a second pressure sensor (7) and a temperature sensor (8) are arranged on the pressure tank (10), the pressure tank (10) is used for being connected with a tested liquid cooling system (1) through the connecting pipe (2), and a third regulating valve (12) and a third pressure sensor (13) are arranged on the connecting pipe (2) connected with the tested liquid cooling system (1) through the connecting pipe (2).
2. The test device for the gas content of the liquid cooling system according to claim 1, further comprising a data processing system (14), wherein the data processing system (14) is electrically connected with the first regulating valve (6), the second regulating valve (9), the third regulating valve (12), the exhaust pressure stabilizing component, the gas flow meter (4), the second pressure sensor (7), the third pressure sensor (13) and the temperature sensor (8).
3. The testing device for the gas content of the liquid cooling system according to claim 2, wherein a liquid level meter (11) is arranged in the pressure tank (10), the exhaust pressure stabilizing component comprises a first pressure sensor (3) and a pressure stabilizing tank (5), the pressure stabilizing tank (5) is arranged on the exhaust pipe, the first pressure sensor (3) is connected with the pressure stabilizing tank (5), the liquid level meter (11) and the first pressure sensor (3) are electrically connected with the data processing system (14), and the first regulating valve (6), the second regulating valve (9) and the third regulating valve (12) are all electric control valves.
4. A method for testing the air content of a liquid cooling system, characterized in that the testing method is implemented by the testing device according to any one of claims 1 to 3, the testing method comprising the steps of: step S100, connecting the testing device to a tested liquid cooling system (1) through the connecting pipe (2), and executing the operation of opening the third regulating valve (12) and closing the first regulating valve (6); Step 200, activating the second regulating valve (9) to inject gas into the pressure tank (10) until the interior of the tested liquid cooling system (1) reaches a preset initial pressure level; Step S300, after the second regulating valve (9) is closed, waiting for the pressure in the tested liquid cooling system (1) to reach balance, and recording the pressure and temperature parameters at the moment; Step S400, gradually adjusting the first adjusting valve (6) to release gas at a specified rate, closing the first adjusting valve (6) when the internal pressure of the liquid cooling system (1) to be tested is reduced to a set pressure, and recording gas flow data and gas volume change in the air release process; Step S500, repeatedly executing the step S400 for a plurality of times, and maintaining the same pressure reduction amplitude each time; And S600, calculating the gas content in the tested liquid cooling system (1) according to the collected pressure, temperature parameters and gas flow data.
5. The method for testing the air content of a liquid cooling system according to claim 4, wherein the calculation formula for calculating the air content in the liquid cooling system (1) to be tested according to the collected pressure, temperature parameters and gas flow data is as follows: Wherein V a is the gas volume under the standard atmospheric pressure in the tested liquid cooling system, n represents the nth gas content test, i represents the ith gas content test, P std is the standard atmospheric pressure, T std is the standard temperature, deltaV i is the internal volume of the tested liquid cooling system pipeline changed due to pressure change during the ith measurement, P i0 is the starting pressure during the ith test, P i1 is the ending pressure during the ith test, T i0 is the starting temperature during the ith test, T i1 is the ending temperature during the ith test, and DL i is the liquid level change during the ith test.
6. The method according to claim 4, further comprising controlling the liquid level in the pressure tank (10) to a position between 10% and 30% of the range of the liquid level meter (11) in step S200, and setting the pressure change per bleed to 20% of the initial pressure in step S500.
7. A test method for the gas content of a liquid cooling system according to claim 5, characterized in that the data processing system (14) is adapted to perform the following operations in real time during the test: continuously monitoring and calculating the change rate of the internal pressure of the tested liquid cooling system (1), and judging that the pressure of the tested liquid cooling system (1) tends to be stable when the change rate of the pressure is lower than a preset threshold value, so as to determine that the test starting condition is met; receiving externally input parameters to set specific starting points and ending points of each test; And removing various interferences by setting different filtering conditions, and judging that a single test result reaches a stable state and meets a stop condition when the change amplitude of the filtered data is smaller than a preset range.
8. The method for testing the air content of the liquid cooling system according to claim 5, further comprising disconnecting the testing device from the liquid cooling system (1) to be tested after data acquisition and calculation are completed, and ending the testing process.
9. An electronic device comprising a processor and a memory, wherein the processor is configured to implement the steps of the method for testing the air content of a liquid cooling system according to any one of claims 4 to 8 when executing a computer program stored in the memory.
10. A computer readable storage medium having a computer program stored thereon, wherein the computer program when executed by a processor performs the steps of the method for testing the gas content of a liquid cooling system according to any one of claims 4 to 8.

Description

Device and method for testing air content of liquid cooling system, electronic equipment and medium Technical Field The invention belongs to the technical field of thermal management, and particularly relates to a device and a method for testing air content of a liquid cooling system, electronic equipment and a medium. Background The exhaust performance of the liquid cooling system is an important guarantee for the stable operation of the liquid cooling system, and the problems of heat radiation performance reduction, pump performance reduction, system operation pressure fluctuation, noise increase, abnormal fluctuation of the water tank liquid level in the operation process and the like can be caused by the abnormal gas content in the liquid cooling system. Therefore, the method has great application significance in accurately measuring the gas content in the liquid cooling system. The currently commonly used system gas content judging method comprises a cooling liquid filling amount measuring method, a liquid viewing mirror/transparent pipeline visual detection method, a water tank liquid level observation method, a pressure monitoring method, a flow detection method, a noise detection method, a high-precision optical/ultrasonic detection method and the like. The coolant filling amount metering method is used for judging the air content by calculating the difference between the volume of coolant filled into the system and the internal volume of the cooling system, and when the individual cooling systems have differences, the error is larger. The visual inspection method of the liquid viewing mirror/transparent pipeline is characterized in that the transparent pipeline/liquid viewing mirror is designed in a liquid cooling system so as to find whether bubbles exist in the pipeline or not through visual inspection. The water tank liquid level observation method is characterized in that when the observation system is started or stopped, the liquid level in the expansion tank or the liquid storage tank fluctuates. If the liquid level has obvious fluctuation, which indicates that air possibly exists in the system, the method can carry out qualitative judgment on whether the air is contained or not, the value of the air content cannot be quantitatively given, and the possibility of certain misjudgment exists. The pressure monitoring method monitors the pressure through a pressure sensor in the liquid cooling system, and the existence of gas can cause pressure fluctuation in the system. If the system pressure abnormally fluctuates, particularly when the liquid pump is started or stopped, it may be an indication that the system contains gas. The method is the same as the previous method, can carry out qualitative judgment on whether the gas is contained, can not quantitatively give the value of the gas content, and has the possibility of certain misjudgment. The flow detection method is consistent with the pressure monitoring method in principle, and is mainly used for judging whether the gas is contained or not by monitoring the flow of the system. The noise detection method judges whether the system is air-containing by monitoring the noise of the pipeline when the system is in operation, and when the liquid cooling system is air-containing, particularly the pump is air-containing, the noise is usually generated. By installing an acoustic sensor or listening with the ear, it is possible to identify whether there is abnormal noise in the system. The value of the air content cannot be quantitatively given, and a certain misjudgment possibility exists. The high-precision optical/ultrasonic detection method is used for accurately detecting bubbles in a pipeline by applying a precise optical/ultrasonic instrument. The method can detect bubble generation and movement in the liquid, and can quantitatively test the gas content in the pipeline, but the method has high operation load and high requirement on instruments, and under complex field conditions, the method may not have test conditions and has insufficient adaptability. Disclosure of Invention The invention provides a device, a method, electronic equipment and a medium for testing the air content of a liquid cooling system, and aims to solve the problem that the air content in the liquid cooling system is difficult to measure efficiently and accurately so as to ensure the stable operation of the system. In order to achieve the aim, the first aspect of the invention provides a testing device for the air content of a liquid cooling system, which comprises a pressure tank, wherein the pressure tank is connected with a connecting pipe, an exhaust pipe and an air inlet pipe, a first regulating valve, an exhaust pressure stabilizing component and an air flowmeter are sequentially arranged on the exhaust pipe close to the pressure tank, the air inlet pipe is used for being connected with an external air source, a second regulating valve is arranged on the air inlet pipe