Liquid cooling system and liquid cooling system leakage location detection method

Abstract

The present invention discloses a liquid cooling system and a method for locating and detecting a leakage position of the liquid cooling system. The liquid cooling system comprises a liquid storage tank, a heat exchanger, a circulating pump, a server, a pressure collection component, a temperature collection component and a flow collection component. The liquid storage tank, a first pipeline, a heat exchanger, a second pipeline, a circulating pump, a third pipeline, a server and a fourth pipeline together constitute a circulation loop. The pressure collection component is used to collect real-time pressure values ​​of the first pipeline, the second pipeline, the third pipeline and the fourth pipeline. The temperature collection component is used to collect real-time temperature values ​​of the third pipeline and the fourth pipeline. The flow collection component is used to collect real-time flow values ​​of the third pipeline. The present invention can accurately locate the leakage position so that the user can handle it in time, prevent the coolant from flowing out to the server due to the deterioration of the leakage, and effectively ensure the normal operation of the server.

Description

Technical Field

[0001] The present invention relates to the field of liquid cooling technology, and in particular to a liquid cooling system and a method for locating and detecting leakage positions of the liquid cooling system. Background Art

[0002] Liquid cooling systems have been developing rapidly in recent years due to their good heat exchange characteristics. However, there is a risk of leakage in liquid cooling systems, which has always affected the further development of the liquid cooling system. Existing liquid cooling systems are divided into positive pressure liquid cooling systems and negative pressure liquid cooling systems.

[0003] Existing positive pressure liquid cooling systems generally use leak sensors to detect leaks, that is, when the coolant leaks in the system, it will trigger an external sensor alarm. However, for the server, this alarm is triggered too late. When the alarm is triggered, the coolant may have leaked into the server, causing damage to the server. Therefore, the leak detection of existing positive pressure liquid cooling systems is a post-event alarm, which cannot be predicted in advance. The alarm can only be issued to prompt the user after the leak.

[0004] The negative pressure liquid cooling system can ensure that the coolant does not flow out of the system when a leak occurs. However, if a minor leak is not handled in time, the leakage may increase and the coolant may still leak to the outside.

[0005] In fact, because the internal pressure of the negative pressure liquid cooling system is lower than the atmospheric pressure, when there is a slight leak, air will be sucked into the system and the coolant will not flow out. The conventional leak detection method of the positive pressure liquid cooling system using a water leak sensor is not suitable for slight leaks in the negative pressure liquid cooling system. Only when the leakage increases and the coolant flows out, the conventional leak detection method using a water leak sensor is useful. In addition, the existing leak detection method cannot locate the leak. Only when the coolant leak triggers the water leak sensor can the user locate the leak by looking with the naked eye. Summary of the invention

[0006] The purpose of the present invention is to provide a liquid cooling system and a method for locating and detecting the leakage position of the liquid cooling system, which can accurately locate the leakage position so that the user can deal with it in time, prevent the cooling liquid from flowing out to the server due to the deterioration of the leakage, and effectively ensure the normal operation of the server.

[0007] In order to achieve the above-mentioned purpose, the present invention discloses a liquid cooling system, which includes a liquid storage tank, a heat exchanger, a circulation pump, a server, a pressure collection component, a temperature collection component and a flow collection component. The first port of the liquid storage tank is connected to the secondary side inlet of the heat exchanger through a first pipeline, the water inlet of the circulation pump is connected to the secondary side outlet of the heat exchanger through a second pipeline, the water outlet of the circulation pump is connected to the water inlet of the server through a third pipeline, and the water outlet of the server is connected to the second port of the liquid storage tank through a fourth pipeline. The liquid storage tank, the first pipeline, the heat exchanger, the second pipeline, the circulation pump, the third pipeline, the server and the fourth pipeline together constitute a circulation loop. The pressure collection component is used to collect real-time pressure values ​​of the first pipeline, the second pipeline, the third pipeline and the fourth pipeline, the temperature collection component is used to collect real-time temperature values ​​of the third pipeline and the fourth pipeline, and the flow collection component is used to collect real-time flow value of the third pipeline.

[0008] Preferably, the liquid cooling system also includes a vacuum pump and a one-way valve, one end of the vacuum pump is connected to the outside air, and the other end is connected to the third port of the liquid storage tank through a fifth pipeline. The one-way valve is connected in series to the fifth pipeline, and limits the outside air from entering the liquid storage tank in one direction from the vacuum pump along the fifth pipeline. The pressure collection component is also used to collect the real-time pressure value of the fifth pipeline.

[0009] Preferably, the liquid cooling system also includes a flow regulating valve, the primary side outlet of the heat exchanger is connected to the heat exchange medium recovery end through the sixth pipeline, the primary side inlet of the heat exchanger is connected to the heat exchange medium supply end through the seventh pipeline, the flow regulating valve is connected in series to the sixth pipeline, and the flow collection component is also used to collect the real-time flow value of the seventh pipeline.

[0010] Preferably, the pressure collection component includes a first pressure sensing unit, a second pressure sensing unit, a third pressure sensing unit, a fourth pressure sensing unit and a fifth pressure sensing unit, the first pressure sensing unit is arranged on the first pipeline and is used to collect the real-time pressure value of the first pipeline, the second pressure sensing unit is arranged on the second pipeline and is used to collect the real-time pressure value of the second pipeline, the third pressure sensing unit is arranged on the third pipeline and is used to collect the real-time pressure value of the third pipeline, the fourth pressure sensing unit is arranged on the fourth pipeline and is used to collect the real-time pressure value of the fourth pipeline, and the fifth pressure sensing unit is arranged on the fifth pipeline and is used to collect the real-time pressure value of the fifth pipeline.

[0011] Preferably, the temperature acquisition component includes a first temperature sensing unit and a second temperature sensing unit, the first temperature sensing unit is arranged on the third pipeline and is used to collect the real-time temperature value of the third pipeline, and the second temperature sensing unit is arranged on the fourth pipeline and is used to collect the real-time temperature value of the fourth pipeline.

[0012] Preferably, the flow collection component includes a first flow meter and a second flow meter, the first flow meter is arranged on the third pipeline and used to collect the real-time flow value of the third pipeline, and the second flow meter is arranged on the seventh pipeline and used to collect the real-time flow value of the seventh pipeline.

[0013] Correspondingly, the present invention also discloses a method for detecting the position of leakage in a liquid cooling system, which is applied to the liquid cooling system as described above. The method for detecting the position of leakage in a liquid cooling system comprises the following steps:

[0014] S1. Obtain the load status of the server;

[0015] S2. If the load status of the server does not change within a unit time, the leakage position in the circulation loop is gradually located according to the pressure value collected by the pressure collection component, the temperature value collected by the temperature collection component, and the flow value collected by the flow collection component.

[0016] Preferably, in step S2, the leakage position in the circulation loop is gradually located according to the pressure value collected by the pressure collection component, the temperature value collected by the temperature collection component and the flow value collected by the flow collection component, which specifically includes the following steps:

[0017] S21, determining whether the increase in the real-time pressure value of the first pipeline within a unit time exceeds a first preset threshold value, and if so, there is a leak at the first port position of the first pipeline near the liquid storage tank;

[0018] S22, if not, determining whether the increase in the real-time pressure value of the second pipeline within a unit time exceeds a second preset threshold value, and if so, there is a leak at the secondary side inlet position of the first pipeline near the heat exchanger, or there is a leak at the secondary side outlet position of the second pipeline near the heat exchanger;

[0019] S23, if not, then determine whether the increase in the real-time output power of the circulation pump within the preset time exceeds the fourth preset value, and whether the real-time flow value of the third pipeline remains unchanged within the unit time, if so, there is a leak in the second pipeline near the water inlet of the circulation pump;

[0020] S24, if not, determining whether the increase in the real-time pressure value of the third pipeline within a unit time exceeds a third preset threshold value, and if so, there is a leak in the third pipeline near the water outlet of the circulation pump;

[0021] S25, if not, determining whether the increase in the real-time pressure value of the fourth pipeline within a unit time exceeds a fourth preset threshold value, and if so, there is a leak at the water inlet of the third pipeline near the server, or there is a leak at the water outlet of the fourth pipeline near the server;

[0022] S26, if not, determining whether the increase in the real-time pressure value of the fifth pipeline within a unit time exceeds a fifth preset threshold value, and if so, there is a leak in the liquid storage tank or a location around the liquid storage tank;

[0023] S27. If no, there is no leakage in the liquid cooling system.

[0024] Preferably, if the increase in the real-time pressure value of the second pipeline exceeds the second preset threshold value per unit time, it is determined whether the decrease in the real-time temperature value of the third pipeline exceeds the sixth preset threshold value per unit time. If so, there is a leak at the secondary side inlet position of the first pipeline near the heat exchanger; if not, there is a leak at the secondary side outlet position of the second pipeline near the heat exchanger.

[0025] Preferably, if the increase in the real-time pressure value of the fourth pipeline within a unit time exceeds the fourth preset threshold value, it is determined whether the increase in the real-time temperature value of the fourth pipeline within a unit time exceeds the seventh preset threshold value. If so, there is a leak at the water inlet position of the third pipeline near the server; if not, there is a leak at the water outlet position of the fourth pipeline near the server.

[0026] Compared with the prior art, the liquid storage tank, the first pipeline, the heat exchanger, the circulating pump, the third pipeline, the server and the fourth pipeline of the present invention together constitute a circulation loop. By collecting the real-time pressure values ​​of the first pipeline, the second pipeline, the third pipeline and the fourth pipeline, collecting the real-time temperature values ​​of the third pipeline and the fourth pipeline, and collecting the real-time flow value of the third pipeline, when the load state of the server does not change within a unit time, the leakage position can be accurately located by a step-by-step positioning method, so that the user can deal with it in time, prevent the coolant from flowing out to the server due to the deterioration of the leakage, and effectively ensure the normal operation of the server. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the liquid cooling system of the present invention;

[0028] Figure 2 yes Figure 1 Schematic diagram of the coolant circulation;

[0029] Figure 3 It is a flow chart of the method for locating and detecting leakage position of a liquid cooling system of the present invention. DETAILED DESCRIPTION

[0030] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0031] See also Figure 1 and Figure 2 As shown, the liquid cooling system of this embodiment includes a liquid storage tank 203, a heat exchanger 103, a circulation pump 206, a server 211, a pressure collection component, a temperature collection component and a flow collection component, wherein a certain amount of coolant is stored in the liquid storage tank 203, and the coolant here can be water or other liquids with a higher heat transfer coefficient.

[0032] The first port of the liquid storage tank 203 is connected to the secondary side inlet of the heat exchanger 103 through the first pipeline 10, the water inlet of the circulation pump 206 is connected to the secondary side outlet of the heat exchanger 103 through the second pipeline 20, the water outlet of the circulation pump 206 is connected to the water inlet of the server 211 through the third pipeline 30, and the water outlet of the server 211 is connected to the second port of the liquid storage tank 203 through the fourth pipeline 40. The liquid storage tank 203, the first pipeline 10, the heat exchanger 103, the second pipeline 20, the circulation pump 206, the third pipeline 30, the server 211 and the fourth pipeline 40 together constitute Figure 2 The circulation loop is shown.

[0033] It is understandable that, driven by the circulating pump 206, the coolant flows along the circulating loop. Figure 2 The cooling liquid circulates in a direction shown to take away the heat generated by the server 211. Specifically, the initial flow path of the cooling liquid is: flowing out from the first port of the liquid storage tank 203, flowing through the first pipeline 10, the heat exchanger 103, the second pipeline 20, the circulation pump 206, the third pipeline 30, the server 211 and the fourth pipeline 40 in sequence, and then flowing back to the liquid storage tank 203 along the second port of the liquid storage tank 203.

[0034] The pressure collection component is used to collect the real-time pressure values ​​of the first pipeline 10, the second pipeline 20, the third pipeline 30 and the fourth pipeline 40. The real-time pressure value here should be understood as the real-time water pressure of the coolant in the first pipeline 10, the second pipeline 20, the third pipeline 30 and the fourth pipeline 40.

[0035] The temperature acquisition component is used to acquire the real-time temperature value of the third pipeline 30 and the fourth pipeline 40. The real-time temperature value here should be understood as the real-time water temperature of the coolant in the third pipeline 30 and the fourth pipeline 40.

[0036] The flow collection component is used to collect the real-time flow value of the third pipeline 30. The real-time flow value here should be understood as the amount of coolant flowing through the effective cross-section of the third pipeline 30 per unit time.

[0037] Preferably, the liquid cooling system further includes a vacuum pump 303 and a one-way valve 302. One end of the vacuum pump 303 is connected to the external air, and the other end is connected to the third port of the liquid storage tank 203 through the fifth pipeline 50. The one-way valve 302 is serially connected to the fifth pipeline 50, and limits the external air from the vacuum pump 303 along the fifth pipeline 50 to enter the liquid storage tank 203, affecting the vacuum degree of the liquid cooling system. The pressure collection component is also used to collect the real-time pressure value of the fifth pipeline 50. The real-time pressure value here should be understood as the air pressure in the inlet of the vacuum pump 303 or the liquid storage tank 203.

[0038] Preferably, the liquid cooling system further includes a flow regulating valve 104, the primary side outlet of the heat exchanger 103 is connected to the heat exchange medium recovery end through the sixth pipeline 60, the primary side inlet of the heat exchanger 103 is connected to the heat exchange medium supply end through the seventh pipeline 70, and the flow regulating valve 104 is connected in series to the sixth pipeline 60. The flow regulating valve 104 is provided to limit the flow of the heat exchange medium flowing through the heat exchanger 103 along the primary side of the heat exchanger 103 to control the heat transfer coefficient adjustment of the heat exchanger 103. The flow acquisition component is also used to collect the real-time flow value of the seventh pipeline 70, where the real-time flow value should be understood as the amount of heat exchange medium flowing through the effective cross-section of the seventh pipeline 70 per unit time.

[0039] Preferably, the pressure collection component includes a first pressure sensing unit 204, a second pressure sensing unit 205, a third pressure sensing unit 207, a fourth pressure sensing unit 202 and a fifth pressure sensing unit 301, wherein the first pressure sensing unit 204 is arranged on the first pipeline 10 and is used to collect the real-time pressure value of the first pipeline 10, and the real-time pressure value of the first pipeline 10 collected here can be characterized as the real-time pressure value of the secondary side inlet of the heat exchanger 103. The second pressure sensing unit 205 is arranged on the second pipeline 20 and is used to collect the real-time pressure value of the second pipeline 20, and the real-time pressure value of the second pipeline 20 collected here can be characterized as the real-time pressure value of the secondary side outlet of the heat exchanger 103. The third pressure sensing unit 207 is arranged on the third pipeline 30 and is used to collect the real-time pressure value of the third pipeline 30, and the real-time pressure value of the third pipeline 30 collected here can be characterized as the real-time pressure value of the secondary side outlet of the liquid cooling system of this embodiment. The fourth pressure sensing unit 202 is provided on the fourth pipeline 40 and is used to collect the real-time pressure value of the fourth pipeline 40. The real-time pressure value of the fourth pipeline 40 collected here can be characterized as the real-time pressure value of the secondary return water of the liquid cooling system of this embodiment. The fifth pressure sensing unit 301 is provided on the fifth pipeline 50 and is used to collect the real-time pressure value of the fifth pipeline 50. The real-time pressure value of the fifth pipeline 50 collected here can be characterized as the real-time pressure value of the air at the inlet of the vacuum pump 303 or in the liquid storage tank 203.

[0040] Preferably, the temperature acquisition component includes a first temperature sensing unit 208 and a second temperature sensing unit 201. The first temperature sensing unit 208 is provided on the third pipeline 30 and is used to collect the real-time temperature value of the third pipeline 30. The real-time temperature value of the third pipeline 30 collected here can be characterized as the real-time temperature value of the secondary side outlet water of the liquid cooling system of this embodiment, and can be used to characterize the increase or decrease of the heat transfer coefficient of the heat exchanger 103. The second temperature sensing unit 201 is provided on the fourth pipeline 40 and is used to collect the real-time temperature value of the fourth pipeline 40. The real-time temperature value of the fourth pipeline 40 collected here can be characterized as the real-time temperature value of the secondary side return water of the liquid cooling system of this embodiment.

[0041] Preferably, the flow collection component includes a first flow meter 209 and a second flow meter 102. The first flow meter 209 is provided on the third pipeline 30 and is used to collect the real-time flow value of the third pipeline 30. The real-time flow value of the third pipeline 30 collected here can be characterized as the real-time flow value of the secondary side water outlet of the liquid cooling system of this embodiment. The second flow meter 102 is provided on the seventh pipeline 70 and is used to collect the real-time flow value of the seventh pipeline 70. The real-time flow value of the seventh pipeline 70 collected here can be characterized as the real-time flow value of the primary side inlet of the heat exchanger 103.

[0042] See also Figure 1-Figure 3 As shown, accordingly, the present invention also discloses a method for detecting the position of leakage in a liquid cooling system, which is applied to the liquid cooling system as described above. The method for detecting the position of leakage in a liquid cooling system comprises the following steps:

[0043] S1. Obtain the load status of the server 211.

[0044] It is understandable that the present invention is to accurately locate the leakage position when the load state of the server 211 does not change within a unit time. When the load state of the server 211 is not constant, it is not within the scope of the present invention. In addition, the load here can be understood as the load size of the server 211, and its state includes constant load, increased load, and reduced load.

[0045] S2. If the load state of the server 211 does not change within a unit time, the leakage position in the circulation loop is gradually located according to the pressure value collected by the pressure collection component, the temperature value collected by the temperature collection component, and the flow value collected by the flow collection component.

[0046] During normal operation, if the load state of the server 211 does not change, the liquid cooling system will be in a relatively stable state, that is, the pressure, temperature, power of the circulating pump 206, heat exchange capacity of the heat exchanger 103 and other parameters of the liquid cooling system will basically not change. This embodiment uses this application characteristic to determine whether the liquid cooling system is leaking.

[0047] The heat exchange capacity of server 211 can be calculated by using the parameter information such as the outlet water temperature, return water temperature, flow rate, etc. on the secondary side of the liquid cooling system. Specifically, the heat exchange capacity of server 211 = flow rate * specific heat capacity of coolant * (return water temperature - outlet water temperature). The above formula can be used to determine whether the load of server 211 has changed.

[0048] When the calculated change value of the heat exchange rate of server 211 within a period of time is greater than the first preset value, it is judged that the load of the liquid cooling system has changed; when the calculated change value of the heat exchange rate within a period of time is less than or equal to the first preset value, it is judged that the load of the liquid cooling system has not changed (i.e., the load is constant), and the parameters of the liquid cooling system should be stable at this time.

[0049] When it is detected that the load of the liquid cooling system has changed, the system parameters are unstable. In order to avoid misjudgment, the judgment of liquid cooling system leakage is not performed, that is, the present invention does not discuss the situation where the load of the liquid cooling system is not constant. When it is detected that the load of the liquid cooling system has not changed, the changes in the following parameters are used to judge whether the liquid cooling system is leaking and the specific location of the leakage.

[0050] When the pressure detected by the pressure sensing unit suddenly increases, it means that air has entered from the outside, and it can be judged that the liquid cooling system is leaking. When the liquid cooling system leaks, air will enter the liquid cooling system and move in the direction of pressure reduction, that is, the pressure at the outlet of the circulation pump 206 is the highest, and decreases along the liquid flow direction until the pressure at the inlet of the circulation pump 206 is the lowest.

[0051] When air passes through the heat exchanger 103, the heat exchange efficiency of the heat exchanger 103 will decrease, and at this time, it can be determined that there is a leak at the front end of the heat exchanger 103. The heat exchange efficiency of the heat exchanger 103 can be represented by the heat exchange coefficient of the heat exchanger 103, which is calculated in real time through a formula. When the calculated heat exchange coefficient of the heat exchanger 103 decreases within a period of time and the value is greater than the second preset value, it is determined that there is a leak at the front end of the heat exchanger 103. Heat exchange coefficient of the heat exchanger 103 = specific heat capacity of the coolant * secondary side flow / area of ​​the heat exchanger 103.

[0052] When air passes through the server 211 , the heat exchange efficiency of the server 211 will decrease, thereby causing the secondary side return water temperature to increase. At this time, it can be determined that there is a leak at the front end of the server 211 .

[0053] When air passes through the circulation pump 206 , cavitation will occur in the circulation pump 206 , and the power of the circulation pump 206 will increase. At this time, it can be determined that there is a leak at the front end of the circulation pump 206 .

[0054] Through the above calculation and analysis, step S2 can be concretized to gradually locate the leakage position in the circulation loop. In step S2, the leakage position in the circulation loop is gradually located according to the pressure value collected by the pressure collection component, the temperature value collected by the temperature collection component, and the flow value collected by the flow collection component, which specifically includes the following steps:

[0055] S21, determining whether the increase in the real-time pressure value of the first pipeline 10 within a unit time exceeds a first preset threshold value. If so, there is a leak in the first pipeline 10 near the first port of the liquid storage tank 203, specifically, there is a leak in the portion from the first pressure sensing unit 204 in the first pipeline 10 to the first port of the liquid storage tank 203, and this position is marked as D1 here;

[0056] S22, if not, determine whether the increase in the real-time pressure value of the second pipeline 20 in a unit time exceeds the second preset threshold value. If yes, there is a leak at the secondary side inlet position of the first pipeline 10 near the heat exchanger 103, or there is a leak at the secondary side outlet position of the second pipeline 20 near the heat exchanger 103. Here, the secondary side inlet position of the first pipeline 10 near the heat exchanger 103 is specifically the secondary side inlet portion from the first pressure sensing unit 204 in the first pipeline 10 to the heat exchanger 103, and the secondary side outlet position of the second pipeline 20 near the heat exchanger 103 is specifically the portion from the secondary side outlet of the heat exchanger 103 in the second pipeline 20 to the second pressure sensing unit 205. Here, the portion from the first pressure sensing unit 204 in the first pipeline 10 to the secondary side inlet portion of the heat exchanger 103 is marked as D2, and the portion from the secondary side outlet of the heat exchanger 103 in the second pipeline 20 to the second pressure sensing unit 205 is marked as D3;

[0057] S23, if not, then determine whether the increase in the real-time output power of the circulation pump 206 within the preset time exceeds the fourth preset value, and whether the real-time flow value of the third pipeline 30 remains unchanged within the unit time. If so, there is a leak at the water inlet position of the second pipeline 20 near the circulation pump 206. The water inlet position of the second pipeline 20 near the circulation pump 206 is specifically the part from the second pressure sensing unit 205 in the second pipeline 20 to the water inlet of the circulation pump 206. Here, the part from the second pressure sensing unit 205 in the second pipeline 20 to the water inlet of the circulation pump 206 is marked as D4;

[0058] S24, if not, determine whether the increase in the real-time pressure value of the third pipeline 30 per unit time exceeds a third preset threshold value, if yes, there is a leak at the water outlet of the third pipeline 30 near the circulation pump 206, where the water outlet of the third pipeline 30 near the circulation pump 206 is marked as D5;

[0059] S25, if not, determine whether the increase in the real-time pressure value of the fourth pipeline 40 within a unit time exceeds a fourth preset threshold value. If yes, there is a leak at the water inlet position of the third pipeline 30 near the server 211, or there is a leak at the water outlet position of the fourth pipeline 40 near the server 211. Here, the water inlet position of the third pipeline 30 near the server 211 is marked as D6, and the water outlet position of the fourth pipeline 40 near the server 211 is marked as D7;

[0060] S26, if not, determine whether the increase in the real-time pressure value of the fifth pipeline 50 within a unit time exceeds a fifth preset threshold value, if yes, there is leakage in the liquid storage tank 203 or the position around the liquid storage tank 203, and the liquid storage tank 203 or the position around the liquid storage tank 203 is marked as D8;

[0061] S27. If no, there is no leakage in the liquid cooling system.

[0062] Preferably, if the increase in the real-time pressure value of the second pipeline 20 exceeds the second preset threshold value per unit time, it is determined whether the decrease in the real-time temperature value of the third pipeline 30 exceeds the sixth preset threshold value per unit time. If so, there is a leak at the secondary side inlet position of the first pipeline 10 near the heat exchanger 103; if not, there is a leak at the secondary side outlet position of the second pipeline 20 near the heat exchanger 103.

[0063] Preferably, if the increase in the real-time pressure value of the fourth pipeline 40 within a unit time exceeds the fourth preset threshold value, it is determined whether the increase in the real-time temperature value of the fourth pipeline 40 within a unit time exceeds the seventh preset threshold value. If so, there is a leak at the water inlet position of the third pipeline 30 near the server 211; if not, there is a leak at the water outlet position of the fourth pipeline 40 near the server 211.

[0064] It is worth noting that, for the same liquid cooling system, when the increase in the real-time pressure value of the first pipeline 10, the second pipeline 20, the third pipeline 30, the fourth pipeline 40 or the fifth pipeline 50 exceeds a certain value per unit time, it can be considered that there is a leak in the corresponding pipeline. To simplify the judgment process, the first preset threshold, the second preset threshold, the third preset threshold, the fourth preset threshold, and the fifth preset threshold are all recorded as the third preset value. At this time, when the load of the server 211 does not change, the liquid cooling system leakage location detection method of this embodiment can be simplified as follows:

[0065] When it is detected that the change value of the real-time pressure at the secondary side inlet of the heat exchanger 103 is greater than the third preset value, it is determined that there is leakage in the pipeline between the liquid storage tank 203 and the first pressure sensing unit 204;

[0066] When it is detected that the change value of the real-time pressure at the secondary side outlet of the heat exchanger 103 is greater than the third preset value, and the decrease value of the heat transfer coefficient of the heat exchanger 103 within a period of time is greater than the second preset value, it is determined that there is a leak in the pipeline between the first pressure sensing unit 204 and the heat exchanger 103;

[0067] When it is detected that the change value of the real-time pressure at the secondary side outlet of the heat exchanger 103 is greater than the third preset value, and the decrease value of the heat transfer coefficient of the heat exchanger 103 within a period of time is less than or equal to the second preset value, it is determined that there is a leak in the pipeline between the heat exchanger 103 and the second pressure sensing unit 205;

[0068] When the change value of the real-time power of the circulation pump 206 within the preset time is greater than the fourth preset value, but the speed of the circulation pump 206 remains unchanged (that is, the real-time flow value of the third pipeline remains unchanged within the unit time), it is determined that there is a leak in the pipeline between the second pressure sensing unit 205 and the circulation pump 206;

[0069] When it is detected that the change value of the real-time pressure of the secondary side water outlet is greater than the third preset value, it is determined that there is a leak in the pipeline between the circulation pump 206 and the third pressure sensing unit 207;

[0070] When it is detected that the change value of the real-time pressure of the secondary side return water is greater than the third preset value, and the increase value of the secondary side return water temperature is greater than the seventh preset threshold, it is determined that there is a leak in the pipeline between the third pressure sensing unit 207 and the server 211;

[0071] When it is detected that the change value of the secondary side return water real-time pressure is greater than the third preset value, and the increase value of the secondary side return water temperature is less than or equal to the seventh preset threshold, it is determined that there is a leak in the pipeline between the server 211 and the fourth pressure sensing unit 202;

[0072] When it is detected that the change value 301 of the real-time air pressure at the inlet of the vacuum pump 303 or in the liquid storage tank 203 is greater than the third preset value, it is determined that there is a leakage around the liquid storage tank 203. The leakage around the liquid storage tank 203 here can be understood as a leakage in the liquid storage tank 203 itself or a leakage in the surrounding pipelines where the liquid storage tank 203 is located.

[0073] The following is an example of a 100kW negative pressure liquid cooling system. Assume that the first preset value = 500W, the second preset value = 5W / (m2·k), the third preset value = 0.5bar, the seventh preset threshold = 3°C, and the fourth preset value = 50W.

[0074] The heat exchange on the secondary side is calculated based on the outlet water temperature, return water temperature and flow rate on the secondary side. When the heat exchange change value within 10s is ≤500W, it is determined that the system load has not changed and a leak is determined;

[0075] When it is detected that the change value of the real-time pressure at the inlet of the heat exchanger 103 within 5 seconds is greater than 0.5 bar, it is determined that there is a leak in the pipeline between the liquid storage tank 203 and the first pressure sensing unit 204;

[0076] When it is detected that the change value of the real-time pressure at the outlet of the heat exchanger 103 within 5 seconds is greater than 0.5 bar, and the decrease value of the heat transfer coefficient of the heat exchanger 103 within 5 seconds is greater than 5 W / (m2·k), it is determined that there is a leak in the pipeline between the first pressure sensing unit 204 and the heat exchanger 103;

[0077] When it is detected that the change value of the real-time pressure at the outlet of the heat exchanger 103 within 5 seconds is greater than 0.5 bar, and the decrease value of the heat transfer coefficient of the heat exchanger 103 within 5 seconds is less than or equal to 5 W / (m2·k), it is determined that there is a leak in the pipeline between the heat exchanger 103 and the second pressure sensing unit 205;

[0078] When the change value of the real-time power of the circulation pump 206 within 10 seconds is greater than 50W, but the speed of the circulation pump 206 remains unchanged, it is determined that there is a leak in the pipeline between the second pressure sensing unit 205 and the circulation pump 206;

[0079] When it is detected that the change value of the real-time pressure of the secondary side water outlet within 5 seconds is greater than 0.5 bar, it is determined that there is a leak in the pipeline between the circulation pump 206 and the third pressure sensing unit 207;

[0080] When it is detected that the change value of the real-time return water pressure on the secondary side within 5 seconds is greater than 0.5 bar, and the increase value of the return water temperature on the secondary side within 5 seconds is greater than 3° C., it is determined that there is a leak in the pipeline between the third pressure sensing unit 207 and the server 211;

[0081] When it is detected that the change value of the real-time pressure of the secondary side return water within 5 seconds is greater than 0.5 bar, and the increase value of the secondary side return water temperature 201 within 5 seconds is less than or equal to 3° C., it is determined that there is a leak in the pipeline between the server 211 and the fourth pressure sensing unit 202;

[0082] When it is detected that the change value of the real-time air pressure at the inlet of the vacuum pump 303 or in the liquid storage tank 203 is greater than 0.5 bar within 5 seconds, it is determined that the liquid storage tank 203 or the surrounding area of ​​the liquid storage tank 203 is leaking.

[0083] Combination Figure 1-Figure 3The liquid storage tank 203, the first pipeline 10, the heat exchanger 103, the second pipeline 20, the circulation pump 206, the third pipeline 30, the server 211 and the fourth pipeline 40 of the present invention together constitute a circulation loop. By collecting the real-time pressure values ​​of the first pipeline 10, the second pipeline 20, the third pipeline 30 and the fourth pipeline 40, collecting the real-time temperature values ​​of the third pipeline 30 and the fourth pipeline 40, and collecting the real-time flow value of the third pipeline 30, when the load state of the server 211 does not change within a unit time, the pressure sensing unit detection value is used to determine whether there is a leakage, and then the heat exchange efficiency of the heat exchanger 103, the secondary side return water temperature, the power of the circulation pump 206 and other parameters are used to accurately locate the leakage position. The leakage position is accurately located by step-by-step positioning, so that the user can handle it in time to prevent the coolant from flowing out to the server 211 due to the deterioration of the leakage, and effectively ensure the normal operation of the server 211.

[0084] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A liquid cooling system, Features: It includes a liquid storage tank, a heat exchanger, a circulation pump, a server, a pressure collection component, a temperature collection component and a flow collection component. The first port of the liquid storage tank is connected to the secondary side inlet of the heat exchanger through a first pipeline, the water inlet of the circulation pump is connected to the secondary side outlet of the heat exchanger through a second pipeline, the water outlet of the circulation pump is connected to the water inlet of the server through a third pipeline, and the water outlet of the server is connected to the second port of the liquid storage tank through a fourth pipeline. The liquid storage tank, the first pipeline, the heat exchanger, the second pipeline, the circulation pump, the third pipeline, the server and the fourth pipeline together constitute a circulation loop. The pressure collection component is used to collect real-time pressure values ​​of the first pipeline, the second pipeline, the third pipeline and the fourth pipeline. The temperature collection component is used to collect real-time temperature values ​​of the third pipeline and the fourth pipeline. The flow collection component is used to collect real-time flow values ​​of the third pipeline; It also includes a vacuum pump and a one-way valve, one end of the vacuum pump is connected to the outside air, and the other end is connected to the third port of the liquid storage tank through a fifth pipeline, the one-way valve is serially connected to the fifth pipeline, and limits the outside air from the vacuum pump along the fifth pipeline into the liquid storage tank, and the pressure collection component is also used to collect the real-time pressure value of the fifth pipeline; The pressure collection component includes a first pressure sensing unit, a second pressure sensing unit, a third pressure sensing unit, a fourth pressure sensing unit and a fifth pressure sensing unit. The first pressure sensing unit is arranged on the first pipeline and is used to collect the real-time pressure value of the first pipeline. The second pressure sensing unit is arranged on the second pipeline and is used to collect the real-time pressure value of the second pipeline. The third pressure sensing unit is arranged on the third pipeline and is used to collect the real-time pressure value of the third pipeline. The fourth pressure sensing unit is arranged on the fourth pipeline and is used to collect the real-time pressure value of the fourth pipeline. The fifth pressure sensing unit is arranged on the fifth pipeline and is used to collect the real-time pressure value of the fifth pipeline.

2. The liquid cooling system according to claim 1, Features: It also includes a flow regulating valve. The primary side outlet of the heat exchanger is connected to the heat exchange medium recovery end through the sixth pipeline. The primary side inlet of the heat exchanger is connected to the heat exchange medium supply end through the seventh pipeline. The flow regulating valve is connected in series to the sixth pipeline. The flow collection component is also used to collect the real-time flow value of the seventh pipeline.

3. The liquid cooling system according to claim 2, Features: The temperature acquisition component includes a first temperature sensing unit and a second temperature sensing unit. The first temperature sensing unit is arranged on the third pipeline and is used to collect the real-time temperature value of the third pipeline. The second temperature sensing unit is arranged on the fourth pipeline and is used to collect the real-time temperature value of the fourth pipeline.

4. The liquid cooling system according to claim 2, Features: The flow collection component includes a first flow meter and a second flow meter. The first flow meter is arranged on the third pipeline and is used to collect the real-time flow value of the third pipeline. The second flow meter is arranged on the seventh pipeline and is used to collect the real-time flow value of the seventh pipeline.

5. A method for detecting leakage position of a liquid cooling system, applied to the liquid cooling system as claimed in any one of claims 1 to 4, It is characterized in that The method for locating and collecting leakage positions of a liquid cooling system comprises the following steps: Get the server load status; If the load state of the server does not change within a unit time, the leakage position in the circulation loop is gradually located according to the pressure value collected by the pressure collection component, the temperature value collected by the temperature collection component and the flow value collected by the flow collection component.

6. The method for detecting leakage position of a liquid cooling system according to claim 5, It is characterized in that The step of gradually locating the leakage position in the circulation loop according to the pressure value collected by the pressure collection component, the temperature value collected by the temperature collection component and the flow value collected by the flow collection component specifically includes the following steps: Determine whether the increase in the real-time pressure value of the first pipeline within a unit time exceeds a first preset threshold value, and if so, there is a leak at a first port position of the first pipeline near the liquid storage tank; If not, it is determined whether the increase in the real-time pressure value of the second pipeline within a unit time exceeds a second preset threshold value. If so, there is a leak at the secondary side inlet position of the first pipeline near the heat exchanger, or there is a leak at the secondary side outlet position of the second pipeline near the heat exchanger; If not, it is determined whether the increase in the real-time output power of the circulation pump exceeds the fourth preset value within the preset time, and whether the real-time flow value of the third pipeline remains unchanged within the unit time. If so, there is a leak in the second pipeline near the water inlet of the circulation pump; If not, it is determined whether the increase in the real-time pressure value of the third pipeline within a unit time exceeds a third preset threshold value. If so, there is a leak in the third pipeline near the water outlet of the circulation pump; If not, determine whether the increase in the real-time pressure value of the fourth pipeline within a unit time exceeds a fourth preset threshold value. If so, there is a leak at the water inlet of the third pipeline near the server, or there is a leak at the water outlet of the fourth pipeline near the server; If not, it is determined whether the increase in the real-time pressure value of the fifth pipeline within a unit time exceeds a fifth preset threshold value. If so, there is a leak in the liquid storage tank or a location around the liquid storage tank; If not, there is no leakage in the liquid cooling system.

7. The method for detecting leakage position of a liquid cooling system according to claim 6, It is characterized in that If the increase in the real-time pressure value of the second pipeline within a unit time exceeds the second preset threshold, it is determined whether the decrease in the real-time temperature value of the third pipeline within a unit time exceeds the sixth preset threshold. If so, there is a leak at the secondary side inlet position of the first pipeline near the heat exchanger; If not, there is a leak in the second pipeline near the secondary side outlet of the heat exchanger.

8. The method for detecting leakage position of a liquid cooling system according to claim 6, It is characterized in that If the increase rate of the real-time pressure value of the fourth pipeline within a unit time exceeds the fourth preset threshold, then it is judged whether the increase rate of the real-time temperature value of the fourth pipeline within a unit time exceeds the seventh preset threshold. If so, there is a leak at the water inlet position of the third pipeline near the server; If not, there is a leak at the water outlet position of the fourth pipeline near the server.

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