Liquid cooling system leakage detection method and device

Abstract

The present application discloses a method and device for detecting leakage in a liquid cooling system. First, direct detection is performed, and a leakage signal is used to determine whether liquid exists. If so, whether there is a condensation risk is determined. If so, a normal operation judgment result is output. If not, a leakage judgment result is output. Then, indirect detection is performed: based on the real-time temperature and real-time liquid supply pressure, the liquid level characteristic map is searched to obtain a liquid level calculation value and the liquid level actual measurement value is compared with the liquid level calculation value. If , a leakage judgment result is output. If , a normal operation judgment result is output. If both direct detection and indirect detection output normal operation judgment results, the liquid cooling system is normal, otherwise the liquid cooling system is leaking. By eliminating condensation interference in direct detection and the liquid level dynamic compensation model in indirect detection, combined with the fusion judgment logic of non-leakage or normal, high-humidity environment anti-interference, full liquid circuit leakage coverage, and real-time dynamic calibration are achieved.

Description

Technical Field

[0001] The present application relates to the field of liquid cooling and heat dissipation technology, and in particular to a liquid cooling system leakage detection device and method. Background Art

[0002] As the integration of electronic devices continues to increase, their power density has significantly increased. Traditional air cooling methods are no longer able to meet the high heat flux density required. Liquid cooling technology, with its superior thermal conductivity, has gradually replaced air cooling as the mainstream solution. However, liquid cooling systems face a significant safety hazard in engineering applications due to liquid leakage. Because leaks are difficult to detect in the early stages, cooling medium leakage can easily lead to serious secondary hazards such as equipment cooling failure, component burnout, and even electrical short circuits, becoming a bottleneck restricting the large-scale application of this technology.

[0003] In the prior art, CN114674361A proposes a multi-parameter health monitoring device, method, and system for liquid-cooled electronic equipment. By rationally arranging leakage sensors, differential pressure sensors, pressure sensors, and temperature sensors within the operating space of the liquid-cooled electronic equipment, the device achieves the detection and reporting of leakage and blockage conditions. Leakage detection relies solely on the resistance change principle of thin-film leakage sensors, which are significantly affected by environmental condensation. This is particularly true in marine environments and rainy seasons, where high air humidity levels contribute to a high false alarm rate for leak alarms. Invention patent CN114719896A discloses an environmental monitoring device, method, and system for enclosed spaces at sea. These devices combine leakage sensors with temperature and humidity sensors to eliminate false alarms caused by condensation due to excessively high atmospheric humidity and low temperatures. However, due to limitations in the placement of leakage sensors, they can only detect leaks near the locations where they are deployed, leading to the problem of underreporting leaks in locations where sensors are not deployed.

[0004] In summary, existing leak detection technology faces two contradictory drawbacks: First, to reduce false alarm rates, environmental adaptability must be improved, but sensor compensation mechanisms increase system complexity; second, to reduce missed alarms, sensor density must be increased, which significantly increases deployment costs and may affect equipment layout. Therefore, it is urgent to develop a leak detection method and device that combines high environmental robustness, full liquid path coverage, and manageable costs to overcome the bottleneck of safe application of liquid cooling systems. Summary of the Invention

[0005] The purpose of this application is to overcome the existing technical defects and provide a liquid cooling system leakage detection method and device. By eliminating condensation interference in direct detection and the liquid level dynamic compensation model in indirect detection, combined with the non-leakage or normal fusion judgment logic, it achieves anti-interference in high-humidity environment, full liquid circuit leakage coverage and real-time dynamic calibration.

[0006] The purpose of this application is achieved through the following technical solutions:

[0007] In a first aspect, the present application proposes a method for detecting leakage in a liquid cooling system, the method comprising:

[0008] Direct detection:

[0009] Step S1, using the liquid leakage sensor to detect the liquid leakage signal, and judging whether there is liquid according to the liquid leakage signal, if there is liquid, executing step S2, if not, outputting the normal operation judgment result;

[0010] Step S2: Using an ambient temperature sensor to detect an ambient temperature signal, and an ambient humidity sensor to detect an ambient humidity signal, and combining the psychrometric chart to determine whether there is a condensation risk, outputting a normal operation determination result if there is, and outputting a leakage determination result if there is no condensation risk;

[0011] Indirect detection:

[0012] Step S3, obtaining the fixed volume and variable volume of the system liquid cavity;

[0013] Step S4, obtaining the liquid level, liquid supply temperature, liquid supply pressure, ambient temperature, and vacuum pressure of the system in the initial liquid injection equilibrium state, and calculating the liquid phase volume, gas phase volume, liquid phase weight, and gas phase weight;

[0014] Step S5: Based on the thermal expansion and contraction effect and the compressibility of the gas phase, a liquid level characteristic map is established according to the initial system liquid phase weight and gas phase weight;

[0015] Step S6: Find the liquid level characteristic map based on the real-time temperature and real-time liquid supply pressure to obtain the liquid level calculation value ;

[0016] Step S7: Compare the measured liquid level values and calculated liquid level ,like , then output the leakage judgment result, if , then the output is normal operation judgment result, It is the deviation threshold between the measured liquid level value and the calculated liquid level value;

[0017] Final judgment mode:

[0018] Step S8: If both the direct detection and the indirect detection output normal operation judgment results, it indicates that the liquid cooling system is normal; otherwise, the liquid cooling system is leaking.

[0019] In one possible embodiment, the gas phase weight The calculation formula is: ,in is the gas phase volume, , is the fixed volume of the liquid cavity, the gas phase density for: , is the ideal gas constant, is the ambient temperature, is the vacuum pressure.

[0020] In one possible embodiment, the gas phase volume The calculation formula is: , where the initial gas phase density is for: , is the supply fluid temperature, is the supply fluid pressure.

[0021] In one possible embodiment, the liquid phase volume The calculation formula is: , It's the liquid level. It is a variable volume.

[0022] In one possible embodiment, the liquid phase weight The calculation formula is: , is the liquid density.

[0023] In a possible implementation, in step S2, the ambient temperature signal and the ambient humidity signal are used to search the psychrometric diagram to obtain the dew point temperature. If the ambient temperature is lower than the dew point temperature, there is a risk of condensation.

[0024] In a second aspect, the present application proposes a liquid cooling system leakage detection device, which is applied to a liquid cooling system leakage detection method, including a processing and reporting unit and a liquid leakage sensor, an ambient temperature sensor, an ambient humidity sensor, a liquid level sensor, a liquid supply temperature sensor, and a liquid supply pressure sensor respectively connected to the processing and reporting unit;

[0025] The processing and reporting unit is used to collect and process the collected sensor information and report whether the liquid cooling system is leaking;

[0026] Liquid leak sensors, used to detect the presence of liquid based on the difference in resistance between the sensor surface and the presence of liquid;

[0027] Ambient temperature sensor and ambient humidity sensor are used to detect the temperature and humidity information of the environment, and calculate the dew point temperature of the environment at different humidity levels in combination with the psychrometric chart.

[0028] Liquid level sensor, used to detect liquid level;

[0029] Liquid supply temperature sensor, used to detect liquid supply temperature;

[0030] Liquid supply pressure sensor, used to detect liquid supply pressure.

[0031] In a possible implementation, the liquid leakage sensor is configured as a thin-film sensor, and the installation position is configured at a pipeline connection.

[0032] In a possible implementation, the liquid supply temperature sensors and the liquid supply pressure sensors are evenly arranged at multiple points to obtain the average liquid supply temperature and the average liquid supply pressure.

[0033] The above-mentioned main solution of this application and its various further options can be freely combined to form multiple solutions, all of which are solutions that can be adopted and protected by this application. Moreover, in this application, (non-conflicting options) can also be freely combined with each other and with other options. After understanding the solution of this application, those skilled in the art will understand that there are many combinations based on existing technology and common knowledge, all of which are technical solutions to be protected by this application, and this is not an exhaustive list.

[0034] This application discloses a method and device for detecting leakage in a liquid cooling system. First, direct detection is performed, using the leakage signal to determine whether there is liquid. If so, it is determined whether there is a condensation risk. If so, a normal operation judgment result is output; if not, a leakage judgment result is output. Then, indirect detection is performed: based on the real-time temperature and real-time liquid supply pressure, the liquid level characteristic map is searched to obtain the liquid level calculation value. Compare the measured liquid level value and calculated liquid level ,like , then output the leakage judgment result, if , a normal operation judgment result is output. If both direct and indirect detection output normal operation judgment results, the liquid cooling system is normal; otherwise, the liquid cooling system is leaking. By eliminating condensation interference in direct detection and using a dynamic liquid level compensation model in indirect detection, combined with a fusion judgment logic of "no leak, no failure", high-humidity environment interference resistance, full liquid path leakage coverage, and real-time dynamic calibration are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A flow chart of a liquid cooling system leakage detection method proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0037] The following describes the embodiments of the present application through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0038] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0039] In the existing technology, leakage and blockage status detection and reporting functions are achieved by rationally arranging leakage sensors, differential pressure sensors, pressure sensors, and temperature sensors in the operating space of liquid-cooled electronic equipment. Among them, leakage status detection is achieved only by relying on the resistance change principle of thin-film leakage sensors, which is greatly affected by environmental condensation. This is particularly prominent in scenarios such as marine environments and rainy seasons with high air humidity, which will result in a high false alarm rate for leakage alarms. In addition, the combination of leakage sensors and temperature and humidity sensors can eliminate false alarms of leakage sensors caused by condensation due to excessive atmospheric humidity and low temperature. However, due to the limitations of the placement of leakage sensors, they can only detect leaks near the placement points, and there is a problem of missing reports of leaks in locations where sensors are not placed.

[0040] Therefore, in order to solve the leakage problem of liquid cooling system in the prior art, the embodiment of the present application proposes a liquid cooling system leakage detection method and device. The method consists of three parts: direct detection, indirect detection and final judgment. It takes into account the identification and judgment of the influence of various complex factors such as leakage, condensation, liquid level change, residual gas, etc., and uses the ambient temperature and humidity information to compare with the enthalpy-humidity diagram to eliminate false alarms caused by condensation. At the same time, by comparing the liquid level, liquid supply temperature and liquid supply pressure information with the liquid level characteristic diagram, the special situation that the leakage is not detected by the leakage sensor can be avoided, thereby greatly reducing the probability of false alarm reporting and achieving high-accuracy leakage detection performance.

[0041] Please refer to Figure 1 , Figure 1 A flow chart of a method for detecting leakage in a liquid cooling system according to an embodiment of the present application is shown. The method includes:

[0042] Direct detection:

[0043] Step S1, using the liquid leakage sensor to detect the liquid leakage signal, and judging whether there is liquid according to the liquid leakage signal, if there is liquid, executing step S2, if not, outputting the normal operation judgment result;

[0044] Step S2: Use the ambient temperature sensor to detect the ambient temperature signal, the ambient humidity sensor to detect the ambient humidity signal, and combine the enthalpy-humidity diagram to determine whether there is a condensation risk. If so, output a normal operation judgment result; if not, output a leakage judgment result.

[0045] Direct detection, through sensor signal acquisition and environmental factor analysis, can quickly and effectively determine if a liquid cooling system leaks. A highly sensitive leak sensor detects leak signals. Based on the principle that liquid contact causes a change in resistance, this sensor monitors key locations, such as pipe connections, for leaks in real time. Detecting a leak signal indicates that liquid may have leaked from within the system into the external environment, prompting immediate execution of step S2 for further confirmation. If no leak signal is detected, the system is operating normally under the current detection state, indicating no leaks. A normal operation determination is then output.

[0046] After step S1 detects the presence of liquid, in order to further determine whether this is a true liquid leak, it is necessary to use an ambient temperature sensor to detect the ambient temperature signal, and at the same time use an ambient humidity sensor to detect the ambient humidity signal. The ambient temperature and humidity sensor is installed in the upper position of the liquid cooling system along the direction of gravity to avoid the influence of large temperature and humidity gradients or equipment height differences. Combined with the enthalpy-humidity diagram, it is determined whether there is a condensation risk. If there is a condensation risk, the judgment result that the liquid cooling system is operating normally is output; on the contrary, if the ambient temperature is higher than or equal to the dew point temperature, that is, there is no condensation risk, then it can be confirmed that the liquid detected by the leakage sensor is due to a real leak in the liquid cooling system, and the judgment result of the liquid cooling system leakage is output at this time.

[0047] In step S2, the ambient temperature signal and the ambient humidity signal are used to search the psychrometric chart to obtain the dew point temperature. If the ambient temperature is lower than the dew point temperature, there is a risk of condensation.

[0048] After acquiring the ambient temperature and humidity signals, the data is combined with a psychrometric chart for analysis. The psychrometric chart, a graph describing the thermal and hygrometric properties of air, determines the dew point based on the ambient temperature and humidity. If the ambient temperature falls below the dew point, condensation conditions have occurred. Water vapor in the air may condense into droplets on the surface of the liquid cooling system, causing the leak sensor to falsely indicate a leak.

[0049] Indirect detection:

[0050] Step S3: Obtain the fixed volume and variable volume of the system liquid cavity.

[0051] Step S4: Obtain the liquid level, liquid supply temperature, liquid supply pressure, ambient temperature, and vacuum pressure of the system in the initial liquid injection equilibrium state, and calculate the liquid phase volume, gas phase volume, liquid phase weight, and gas phase weight.

[0052] Step S5: Based on the thermal expansion and contraction effect and the compressibility of the gas phase, a liquid level characteristic map is established according to the initial system liquid phase weight and gas phase weight.

[0053] Step S6: Find the liquid level characteristic map based on the real-time temperature and real-time liquid supply pressure to obtain the liquid level calculation value .

[0054] Step S7: Compare the measured liquid level values and calculated liquid level ,like , then output the leakage judgment result, if , then the output is normal operation judgment result, It is the deviation threshold between the measured liquid level value and the calculated liquid level value.

[0055] Gas phase weight The calculation formula is: ,in is the gas phase volume, , is the fixed volume of the liquid cavity, the gas phase density for: , is the ideal gas constant, is the ambient temperature, is the vacuum pressure.

[0056] Gas phase volume The calculation formula is: , where the initial gas phase density is for: , is the supply fluid temperature, is the supply fluid pressure.

[0057] Liquid phase volume The calculation formula is: , It's the liquid level. It is a variable volume.

[0058] Liquid phase weight The calculation formula is: , is the liquid density.

[0059] Indirect detection can quickly and effectively make a preliminary judgment on the leakage of the liquid cooling system through accurate sensor signal collection and rigorous environmental factor analysis. Step S3 obtains the fixed volume of the system liquid cavity and variable volume The volume of the liquid chamber of the liquid cooling system consists of two parts: fixed volume and variable volume. The fixed volume refers to the constant part of the liquid cooling system, while the variable volume is the part that changes with the liquid level.

[0060] Step S4 obtains the liquid level of the system in the initial injection equilibrium state , Liquid supply temperature , Liquid supply pressure , ambient temperature and vacuum pressure . Using these initial parameters, calculate the liquid volume , gas phase volume , liquid phase weight and gas phase weight Gas phase weight The ideal gas constant in the calculation formula The value is 287J / (kg⋅K)), the liquid density According to the physical properties of the liquid phase and the liquid supply temperature , Liquid supply pressure get.

[0061] Step S5: Based on the thermal expansion and contraction effect and the compressibility of the gas phase, a liquid level characteristic map is established according to the initial system liquid phase weight and gas phase weight. The liquid level characteristic map can represent the corresponding relationship between the real-time liquid level and the real-time liquid supply temperature and pressure. Solution: Given the gas phase weight and liquid phase weight At any temperature and pressure Gas phase volume ,in, It can be obtained according to the ideal gas state equation. At the same time, the liquid volume ,in, It can be obtained based on the physical properties of the liquid phase. and liquid phase volume , we can calculate .

[0062] Step S6 is based on the real-time liquid supply temperature and supply pressure , find the liquid level characteristic map , get the calculated value of liquid level .

[0063] Step S7: Compare the measured liquid level value and calculated liquid level .like , then output the judgment result of liquid cooling system leakage; if , then the output is the judgment result that the liquid cooling system is operating normally. Among them, is the deviation threshold between the measured value and the calculated value of the liquid level, and its value range is [2%× ,5%× ], the specific value is related to the detection accuracy of the liquid level sensor. The value decreases as the detection accuracy of the liquid level sensor increases.

[0064] The indirect detection method can effectively avoid special situations that are not detected by the leakage sensor by comprehensively considering the thermal expansion and contraction effects and the compressible characteristics of the gas phase, thereby reducing missed alarms and improving alarm efficiency.

[0065] Final judgment mode:

[0066] Step S8: If both the direct detection and the indirect detection output normal operation judgment results, it indicates that the liquid cooling system is normal; otherwise, the liquid cooling system is leaking.

[0067] When both direct and indirect detection results indicate normal system operation, the system confirms that the liquid cooling system is operating normally. If the direct detection result indicates that the system is operating normally (i.e., there is a condensation risk but no leak has been confirmed), and the indirect detection result indicates that the system is operating normally, the system also outputs a normal operation judgment. If either direct or indirect detection results in a system leak, the system outputs a leak judgment, ensuring that leaks are discovered promptly. This final judgment mode, by combining the results of direct and indirect detection, effectively reduces the probability of false positives and missed negatives, and improves the accuracy and reliability of leak detection.

[0068] Table 1 shows the final judgment logic for liquid cooling system leaks, which integrates the results of direct and indirect testing to determine the final status of the liquid cooling system. Specifically, if both direct and indirect testing determine that the system is operating normally, the final judgment is that the system is operating normally. If either detection mode determines a leak, the final judgment is that the system is leaking. If the direct test result is inconclusive (possible condensation risk but no leak confirmed) and the indirect test result is normal, the final judgment is that the system is normal. This logic ensures high sensitivity and reliability of leak detection, enabling timely detection of leaks and avoiding false alarms and missed alarms.

[0069] Table 1

[0070]

[0071] The following describes a possible implementation of a liquid cooling system leak detection device, which is used to perform the various execution steps and corresponding technical effects of the liquid cooling system leak detection method shown in the above embodiments and possible implementations. The device includes a processing and reporting unit and a liquid leakage sensor, an ambient temperature sensor, an ambient humidity sensor, a liquid level sensor, a liquid supply temperature sensor, and a liquid supply pressure sensor, respectively connected to the processing and reporting unit.

[0072] The processing and reporting unit is used to collect and process the collected sensor information and report whether the liquid cooling system is leaking;

[0073] Liquid leak sensors, used to detect the presence of liquid based on the difference in resistance between the sensor surface and the presence of liquid;

[0074] Ambient temperature sensor and ambient humidity sensor are used to detect the temperature and humidity information of the environment, and calculate the dew point temperature of the environment at different humidity levels in combination with the psychrometric chart.

[0075] Liquid level sensor, used to detect liquid level;

[0076] Liquid supply temperature sensor, used to detect liquid supply temperature;

[0077] Liquid supply pressure sensor, used to detect liquid supply pressure.

[0078] The processing and reporting unit collects and processes sensor information collected by the multi-sensor unit and reports whether a leak has occurred in the cooling system based on the leak detection method. The leak sensor directly detects the presence of liquid in the system based on the difference in resistance between the sensor surface and the presence of liquid.

[0079] The ambient temperature sensor and humidity sensor monitor the temperature and humidity of the liquid cooling system's environment. By combining a psychrometric chart with the dew point temperature at different humidity levels, the system calculates the dew point. If the ambient temperature is below the dew point, condensation conditions have been reached, and vice versa. This prevents false alarms from leak sensors caused by condensation. To improve detection accuracy, the temperature sensor is positioned slightly below the system's gravity, while the humidity sensor is positioned slightly above the system's gravity to mitigate the effects of large temperature and humidity gradients or high equipment heights.

[0080] Liquid level sensors, supply temperature sensors, and supply pressure sensors are all installed within the liquid cooling system, in direct contact with the coolant. They are used to detect the system liquid level, supply temperature, and supply pressure, respectively. Supply temperature and pressure sensors should be evenly distributed across the system to obtain average system temperature and pressure, providing a more comprehensive picture of the system's internal status.

[0081] The liquid leakage sensor is configured as a thin film sensor, and the installation position is configured at the pipeline connection.

[0082] Liquid leak sensors utilize a thin-film design, utilizing the change in electrical resistance upon contact with liquids to sensitively detect leaks in the system. They are ideally installed at pipe joints, as these areas are at high risk of leaks. Installing these sensors in these critical locations ensures timely detection of leaks.

[0083] The liquid supply temperature sensor and the liquid supply pressure sensor are evenly arranged at multiple points to obtain the average liquid supply temperature and the average liquid supply pressure.

[0084] The supply temperature and pressure sensors are evenly distributed across multiple locations, providing comprehensive coverage across different areas of the liquid cooling system. This arrangement effectively reduces measurement errors caused by local temperature and pressure fluctuations, providing a more accurate picture of the system's supply temperature and pressure. By measuring multiple locations and calculating the average value, the system's average supply temperature and pressure can be more reliably determined.

[0085] In one possible embodiment, the processing and reporting unit can be integrated with the liquid cooling system motor controller. Leakage sensors are installed at each pipe connection, and ambient temperature and humidity sensors are installed at the lower and upper positions of the liquid cooling system, respectively, in the direction of gravity. The liquid level sensor, supply temperature sensor, and supply pressure sensor are all installed within the liquid cooling system. The supply temperature and pressure sensors are required to be evenly distributed across multiple points within the system to obtain the system's average temperature and pressure. All sensors are connected to the processing and reporting unit via connectors to report detection information.

[0086] The operating scenarios faced by the system can be divided into the following four types according to whether the system is leaking and condensing. The operation of the leakage detection device in each scenario is described as follows:

[0087] System leakage and condensation scenario: In this scenario, the leakage sensor reports resistance changes, the ambient temperature and humidity sensor reports temperature and humidity information, and the psychrometric chart reports the risk of condensation. The direct mode output system may be normal. Furthermore, the liquid supply temperature and pressure sensor reports temperature and pressure information, and the liquid level characteristic map is checked to obtain the calculated liquid level value. , compare the actual liquid level value reported by the liquid level sensor :like , the indirect mode output system leaks, and finally determines that the output system leaks; if , the indirect mode output system is normal, and finally it is determined that the output system is normal.

[0088] System leakage with no condensation: In this scenario, the leakage sensor reports a resistance change, the ambient temperature and humidity sensor reports temperature and humidity information, and the psychrometric chart indicates no condensation risk. The direct mode output indicates a system leakage. Regardless of the indirect mode output, the output system is ultimately determined to be leaking.

[0089] System does not leak or condense: In this scenario, the leakage sensor reports resistance changes, the ambient temperature and humidity sensor reports temperature and humidity information, and the psychrometric chart reports the risk of condensation. The direct mode output system is normal. Furthermore, the liquid supply temperature and pressure sensor reports temperature and pressure information, and the liquid level characteristic map is checked to obtain the calculated liquid level value. , compare the actual liquid level value reported by the liquid level sensor :like Indirect mode output system leaks, and finally determines that the output system leaks; if , the indirect mode output system is normal, and finally it is determined that the output system is normal.

[0090] System does not leak or condense: In this scenario, the leakage sensor reports no resistance change, the ambient temperature and humidity sensor reports temperature and humidity information, and the psychrometric chart reports no condensation risk, and the direct mode output system is normal. Furthermore, the liquid supply temperature and pressure sensor reports temperature and pressure information, and the liquid level characteristic chart is checked to obtain the calculated liquid level value. , compare the actual liquid level value reported by the liquid level sensor :like , the indirect mode output system leaks, and finally determines that the output system leaks; if The indirect mode output system is normal, and it is finally determined that the output system is normal.

[0091] Based on the above operating instructions, it can be seen that this leak detection method can eliminate false alarms caused by condensation by comparing the ambient temperature and humidity information with the enthalpy-humidity diagram. At the same time, by comparing the liquid level, supply temperature and supply pressure information with the liquid level characteristic diagram, it can avoid the special situation where the leakage is not detected by the leakage sensor, thereby simultaneously reducing false alarms and improving alarm efficiency.

[0092] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0093] First, by integrating the processing and reporting unit and the multi-sensor unit, simultaneous monitoring of the equipment usage environment and the internal status of the system is achieved, which simplifies the system composition, reduces the complexity and cost of the system, and enhances versatility and portability.

[0094] Second, it can comprehensively consider the influence of multiple factors such as leakage, condensation, liquid level changes and residual gas, thereby significantly reducing the probability of false alarms and improving the accuracy and reliability of leakage detection.

[0095] Third, for the first time, an indirect detection logic based on liquid level sensors, liquid supply temperature sensors, and liquid supply pressure sensors was established. Taking into account the thermal expansion and contraction effects and the compressible characteristics of the gas phase, the liquid level characteristic map was used to determine whether the system has a leakage risk, thereby improving the comprehensiveness and accuracy of the detection.

[0096] Fourth, combining ambient temperature and humidity information with the psychrometric diagram can effectively eliminate false alarms caused by condensation and adapt to the needs of liquid cooling system leak detection under different environmental conditions.

[0097] Fifth, through the collaborative work of multiple sensors and comprehensive judgment logic, leaks can be discovered and reported in the early stages, improving the system's response speed and maintenance efficiency, and reducing equipment damage and secondary hazards caused by leaks.

[0098] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for detecting leakage in a liquid cooling system, characterized in that: The method comprises: Direct detection: Step S1, using the liquid leakage sensor to detect the liquid leakage signal, and judging whether there is liquid according to the liquid leakage signal, if there is liquid, executing step S2, if not, outputting the normal operation judgment result; Step S2: Using an ambient temperature sensor to detect an ambient temperature signal, and an ambient humidity sensor to detect an ambient humidity signal, and combining the psychrometric chart to determine whether there is a condensation risk, outputting a normal operation determination result if there is, and outputting a leakage determination result if there is no condensation risk; Indirect detection: Step S3, obtaining the fixed volume and variable volume of the system liquid cavity; Step S4, obtaining the liquid level, liquid supply temperature, liquid supply pressure, ambient temperature, and vacuum pressure of the system in the initial liquid injection equilibrium state, and calculating the liquid phase volume, gas phase volume, liquid phase weight, and gas phase weight; Step S5: Based on the thermal expansion and contraction effect and the compressibility of the gas phase, a liquid level characteristic map is established according to the initial system liquid phase weight and gas phase weight; Liquid level characteristic map Solution: Given the gas phase weight and liquid phase weight , at any temperature and pressure Next, the gas phase volume ,in According to the ideal gas state equation, the liquid volume ,in Calculated based on the physical properties of the liquid phase, the gas phase volume is known and liquid phase volume , we can calculate , is the fixed volume of the liquid cavity, It is a variable volume; Step S6: Find the liquid level characteristic map based on the real-time temperature and real-time liquid supply pressure to obtain the liquid level calculation value ; Step S7: Compare the measured liquid level values and calculated liquid level ,like , then output the leakage judgment result, if , then the output is normal operation judgment result, It is the deviation threshold between the measured value of liquid level and the calculated value of liquid level; Final judgment mode: Step S8: If both the direct detection and the indirect detection output normal operation judgment results, it indicates that the liquid cooling system is normal; otherwise, the liquid cooling system is leaking.

2. The liquid cooling system leakage detection method according to claim 1, wherein: Gas phase weight The calculation formula is: ,in is the gas phase volume, , gas phase density for: , is the ideal gas constant, is the ambient temperature, is the vacuum pressure.

3. The liquid cooling system leakage detection method according to claim 2, wherein: Gas phase volume The calculation formula is: , where the initial gas phase density is for: , is the supply fluid temperature, is the supply fluid pressure.

4. The liquid cooling system leakage detection method according to claim 3, characterized in that: Liquid phase volume The calculation formula is: , It's the liquid level.

5. The liquid cooling system leakage detection method according to claim 4, characterized in that: Liquid phase weight The calculation formula is: , is the liquid density.

6. The liquid cooling system leakage detection method according to claim 4, characterized in that: In step S2, the ambient temperature signal and the ambient humidity signal are used to search the psychrometric chart to obtain the dew point temperature. If the ambient temperature is lower than the dew point temperature, there is a risk of condensation.

7. A liquid cooling system leakage detection device, characterized in that: The device is applied to the liquid cooling system leakage detection method according to any one of claims 1 to 5, comprising a processing and reporting unit and a liquid leakage sensor, an ambient temperature sensor, an ambient humidity sensor, a liquid level sensor, a liquid supply temperature sensor, and a liquid supply pressure sensor respectively connected to the processing and reporting unit; Processing and reporting unit, used to collect and process the collected sensor information and report whether the liquid cooling system is leaking; Liquid leak sensors, used to detect the presence of liquid based on the difference in resistance between the sensor surface and the presence of liquid; Ambient temperature sensor and ambient humidity sensor are used to detect the temperature and humidity information of the environment, and calculate the dew point temperature of the environment at different humidity levels in combination with the psychrometric chart. Liquid level sensor, used to detect liquid level; Liquid supply temperature sensor, used to detect liquid supply temperature; Liquid supply pressure sensor, used to detect liquid supply pressure.

8. The liquid cooling system leakage detection device according to claim 7, characterized in that: The liquid leakage sensor is configured as a thin film sensor, and the installation position is configured at the pipeline connection.

9. The liquid cooling system leakage detection device according to claim 7, characterized in that: The liquid supply temperature sensor and the liquid supply pressure sensor are evenly arranged at multiple points to obtain the average liquid supply temperature and the average liquid supply pressure.

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