Liquid leakage detection method of data center liquid cooling system

Abstract

The invention provides a liquid leakage detection method for a liquid cooling system of a data center. The liquid leakage detection method is applied to the liquid cooling system of the data center. The liquid cooling system comprises a liquid cooling pipeline, a liquid supply pipe and a liquid return pipe of a main liquid pipeline, each liquid distribution pipeline and each communication pipeline in the liquid cooling pipeline are respectively provided with at least one liquid leakage detection position, and corresponding pressure difference sensing devices and liquid leakage on-off valves are arranged at the liquid leakage detection positions; the liquid leakage detection method comprises the following steps: detecting pressure differences of liquid leakage detection positions of the same main liquid pipeline, the same branch liquid pipeline and the same communication pipeline through each pressure difference sensing device, and when the pressure difference sensing device detects that the pressure difference value of the liquid leakage detection position is greater than a corresponding pressure difference threshold value and is maintained to exceed a corresponding duration threshold value, detecting the liquid leakage of the main liquid pipeline, the branch liquid pipeline and the communication pipeline. Sending a detection signal, and judging whether the liquid cooling pipeline corresponding to the liquid leakage detection position leaks liquid or not based on the detection signal; and closing the liquid leakage on-off valve corresponding to the liquid leakage detection position under the condition of judging that the liquid leakage occurs at the corresponding liquid leakage detection position.

Description

Technical Field

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

[0002] As the demand for computing power continues to increase, the energy consumption of data centers is also increasing, and with it comes the problem of device heat dissipation.

[0003] The application of liquid cooling system can not only improve the power density of a single cabinet, but also reduce the energy consumption of the system. However, since the cooling medium of the liquid cooling system is liquid, leakage of the liquid cooling system will cause damage to the servers in the data center. Therefore, how to detect leakage and improve the detection accuracy of the leakage area is one of the issues that the industry continues to study. Summary of the invention

[0004] In order to solve the above technical problems, the embodiment of the present application provides a leakage detection method for a liquid cooling system in a data center, which is applied to a liquid cooling system in a data center; the data center includes multiple micromodules, each micromodule includes multiple data cabinets, and each data cabinet includes multiple servers; the liquid cooling system includes a liquid cooling pipeline, and the liquid cooling pipeline includes a main liquid pipeline for conveying cooling liquid to each micromodule, a branch liquid pipeline located in the micromodule and used for conveying cooling liquid to each data cabinet in the micromodule, and a connecting pipeline corresponding to each data cabinet and used for conveying cooling liquid to each server in the data cabinet, the main liquid pipeline, each branch liquid pipeline, and each connecting pipeline all include a liquid supply pipe and a liquid return pipe; the main liquid pipeline, each branch liquid pipeline, and each connecting pipeline each have a liquid supply pipe and a liquid return pipe respectively, and have at least one liquid leakage detection position, and when the liquid is leaking, the liquid is detected. The detection position is provided with a corresponding pressure difference sensing device and a leakage on-off valve; each pressure difference sensing device is used to detect the pressure difference between the liquid supply pipe and the liquid return pipe at the leakage detection position, and each leakage on-off valve is used to control the on-off of the liquid cooling pipeline corresponding to the leakage detection position; the leakage detection method comprises: detecting the pressure difference of each leakage detection position of the same main liquid pipeline, the same liquid distribution pipeline, and the same connecting pipeline by each pressure difference sensing device, and when the pressure difference sensing device detects that the pressure difference value of the leakage detection position where it is located is greater than the corresponding pressure difference threshold and is maintained for more than the corresponding time threshold, a detection signal is sent out, and based on the detection signal, it is determined whether the liquid cooling pipeline at the corresponding leakage detection position is leaking; when it is determined that the corresponding leakage detection position is leaking, the leakage on-off valve at the corresponding leakage detection position is closed.

[0005] Since the main liquid pipeline, each branch liquid pipeline and each connecting pipeline each have at least one leakage detection position in their respective liquid supply pipes and liquid return pipes, and corresponding pressure difference sensors and leakage on-off valves are provided at the leakage detection positions, it is possible to determine which specific pipeline among the main liquid pipeline, each branch liquid pipeline and each connecting pipeline is leaking through the pressure difference sensor, thereby improving the detection accuracy of the leakage area; and when it is determined that the pipeline is leaking, the leakage on-off valve at the leakage position can be closed to stop the liquid inlet and outlet of the leaking pipeline without closing the on-off valve of the entire liquid cooling pipeline, thereby reducing the impact of the leakage area on the liquid cooling pipelines in the data center and other areas, and the liquid cooling pipeline used to transport cooling liquid to other modules can operate normally, thereby reducing the impact of the leakage pipeline on the liquid cooling pipelines in the data center and other areas.

[0006] In some embodiments, the pressure differential sensing device includes a first pressure differential sensing device arranged in the connecting pipe, and the position of the first pressure differential sensing device is a first leakage detection position. When the first pressure differential sensing device sends a first detection signal, it is determined that the connecting pipe corresponding to the first leakage detection position is leaking, and the leakage on-off valve of the connecting pipe determined to be leaking is closed.

[0007] The connecting pipeline is not provided with other types of sensing devices, which can save costs. Moreover, when the connecting pipeline leaks, only the leakage on-off valve of the leaking connecting pipeline is closed, which can minimize the impact on the normal inflow and outflow of other connecting pipelines, liquid distribution pipelines and / or main liquid pipelines, thereby reducing the impact of the leakage on the liquid cooling system.

[0008] In some embodiments, the liquid separation pipeline is formed by connecting multiple liquid separation pipeline sections in sequence, each liquid separation pipeline section is connected to at least one connecting pipeline, and a second pressure differential sensor device is set at a position on the upstream side of the corresponding connecting pipeline in each liquid separation pipeline section for liquid supply and at a position on the downstream side of the corresponding connecting pipeline in each liquid separation pipeline section for liquid return. The position where the second pressure differential sensor device is located is a second leakage detection position, and the second pressure differential sensor device is used to send a second detection signal.

[0009] Thus, only the leakage on-off valve of the leaking liquid separation pipeline section can be closed, which can minimize the impact on the normal inflow and outflow of other connecting pipelines, liquid separation pipeline sections and / or main liquid pipelines, thereby reducing the impact of the leakage on the liquid cooling system.

[0010] In some embodiments, for each liquid separation pipeline segment and the connecting pipeline connected thereto, when the first pressure difference sensing device does not send out a first detection signal and the second pressure difference sensing device sends out a second detection signal, it is determined whether the liquid separation pipeline segment corresponding to the second pressure difference sensing device that sends out the second detection signal is leaking; when it is determined that the liquid separation pipeline segment is leaking, the leakage on-off valve of the liquid separation pipeline segment determined to be leaking is closed.

[0011] Therefore, only the leakage on-off valve of the leaking liquid separation pipeline section can be closed according to the second detection signal, which can minimize the impact on the normal inflow and outflow of other connecting pipelines, liquid separation pipeline sections and / or main liquid pipelines, thereby reducing the impact of the leakage on the liquid cooling system.

[0012] In some embodiments, the micromodule also includes multiple liquid cooling distribution units, each of which is connected between the main liquid pipeline and each liquid distribution pipeline. The liquid cooling distribution unit includes a water pump. A corresponding temperature difference sensor device is also provided at each second leakage detection position. In response to the second detection signal, the power of the water pump connected in series with the second detection position is increased. If the temperature difference sensor device located at the second leakage detection position detects that the temperature difference between the supply pipe and the return pipe of the liquid distribution pipeline section corresponding to the second detection position is within a specified temperature range, and the power of the data cabinet corresponding to the liquid distribution pipeline where the second detection position is located is within a specified power range, it is determined that the liquid distribution pipeline section corresponding to the second detection position is leaking, and the leakage on-off valve of the liquid distribution pipeline section determined to be leaking is closed.

[0013] Therefore, based on the second detection signal and the temperature difference between the liquid supply pipe and the liquid return pipe of the liquid separation pipe section detected by the temperature difference sensor, it is possible to determine whether the liquid separation pipe section is leaking, thereby improving the detection accuracy of the leakage area of ​​the liquid separation pipe section.

[0014] In some embodiments, the main liquid pipeline is formed by multiple main liquid pipeline sections connected in sequence, each main liquid pipeline section is connected to at least one liquid separation pipeline, and a third pressure differential sensing device is set at a position on the upstream side of the corresponding liquid separation pipeline in each main liquid pipeline section for liquid supply and at a position on the downstream side of the corresponding liquid separation pipeline in each main liquid pipeline section for liquid return. The position of the third pressure differential sensing device is a third liquid leakage detection position, and the third pressure differential sensing device is used to send a third detection signal.

[0015] Thus, only the leakage on-off valve of the leaking main liquid pipeline section can be closed, which can minimize the impact on the normal inflow and outflow of other connecting pipelines, main liquid pipeline sections and / or main liquid pipelines, thereby reducing the impact of the leakage on the liquid cooling system.

[0016] In some embodiments, for each main liquid pipeline segment and the liquid distribution pipeline connected thereto, when the first pressure differential sensing device does not send out a first detection signal and the second pressure differential sensing device does not send out a second detection signal, and the third pressure differential sensing device sends out a third detection signal, it is determined whether the main liquid pipeline segment corresponding to the third pressure differential sensing device that sends out the third detection signal is leaking; when it is determined that the main liquid pipeline segment is leaking, the leakage on-off valve of the main liquid pipeline segment determined to be leaking is closed.

[0017] Therefore, only the leakage on-off valve of the leaking main liquid pipeline section can be closed according to the third detection signal, which can minimize the impact on the normal inflow and outflow of other liquid distribution pipelines, main liquid pipeline sections and / or main liquid pipelines, thereby reducing the impact of the leakage on the liquid cooling system.

[0018] In some embodiments, a corresponding flow sensor device is also provided at each third leakage detection position located on the liquid supply pipe. If the flow sensor device located at the third leakage detection position of the liquid supply pipe detects that the flow of the main liquid pipeline section corresponding to the third detection position reaches the target flow, the main liquid pipeline section corresponding to the third detection position is determined to be leaking, and the leakage on-off valve of the main liquid pipeline section determined to be leaking is closed.

[0019] Therefore, based on the third detection signal, the flow rate of the main liquid supply pipeline can be detected by the flow sensor device to determine whether the main liquid pipeline section is leaking, thereby improving the detection accuracy of the leakage area of ​​the main liquid pipeline section.

[0020] In some embodiments, the target flow rate is in the range of 40% to 70% of the rated flow rate.

[0021] Limiting the target flow rate within this range can reduce the probability of false alarms due to flow fluctuations and further improve the detection accuracy of the leakage area in the main liquid pipeline section.

[0022] In some embodiments, a corresponding flow sensor device and a corresponding filter sensor are further provided at each third leakage detection position located in the liquid supply pipe. The filter sensor is configured to detect whether the pipeline where it is located is blocked. If the flow sensor device located at the third leakage detection position of the liquid supply pipe detects that the flow of the main liquid pipeline section corresponding to the third detection position is greater than the target flow and the filter sensor located at the third leakage detection position detects that the main liquid pipeline section is not blocked, then it is determined that the main liquid pipeline section corresponding to the third detection position is leaking, and the leakage on-off valve of the main liquid pipeline section determined to be leaking is closed.

[0023] Therefore, based on the third detection signal, it is possible to jointly determine whether the main liquid pipeline section is leaking according to the flow sensor device and the filter sensor, thereby improving the detection accuracy of the leakage area of ​​the main liquid pipeline section.

[0024] The beneficial effects of the embodiments of the present application include: being able to detect liquid leakage and improving the detection accuracy of the liquid leakage area. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0026] Figure 1 A schematic diagram of the structure of a data center liquid cooling system provided for some embodiments of the present application;

[0027] Figure 2 Some embodiments of the present application provide Figure 1 A magnified schematic diagram of region A;

[0028] Figure 3 Some embodiments of the present application provide Figure 1 Schematic diagram of the enlarged area B.

[0029] Description of Reference Numerals

[0030] 1 micromodule; 2 data cabinet; 3 server; 4 main liquid pipeline; 41 main liquid supply pipe; 42 main liquid return pipe; 5 liquid distribution pipeline; 51 liquid distribution supply pipe; 52 liquid distribution return pipe; 6 connecting pipeline; 61 connecting liquid supply pipe; 62 connecting liquid return pipe; 71 pressure difference sensor device; 711 first pressure difference sensor device; 712 second pressure difference sensor device; 713 third pressure difference sensor device; 72 leakage on-off valve; 73 temperature difference sensor device; 74 flow sensor device; 75 filter sensor; 8 liquid cooling distribution unit. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0036] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0039] Below, this application is described in detail.

[0040] As the demand for computing power continues to increase, the energy consumption of data centers is also increasing, and with it comes the problem of device heat dissipation.

[0041] The application of liquid cooling system can not only improve the power density of a single cabinet, but also reduce the energy consumption of the system. However, since the cooling medium of the liquid cooling system is liquid, leakage of the liquid cooling system will cause damage to the servers in the data center. Therefore, how to detect leakage and improve the detection accuracy of the leakage area is one of the issues that the industry continues to study.

[0042] In the prior art, a leakage detection rope is usually used to detect the leakage position. However, when the liquid cooling system of the data center drips, leaks or leaks on a large scale, the leakage detection rope will trigger the leakage alarm device. However, dripping or slight leakage has little effect on the normal operation of the data center. Usually, the liquid cooling system of the data center is only processed when a large-scale leakage occurs in the liquid cooling system of the data center. In order to be able to detect large-scale leakage of the liquid cooling system of the data center, the present application is provided with a pressure difference sensor device on the liquid cooling pipeline. In order to improve the detection accuracy of the specific leakage area, the present application divides the data center into multiple modules, and a pressure difference sensor device is provided on the liquid cooling pipeline used to transport coolant to each module. Therefore, when the liquid cooling pipeline leaks, it can be detected that the liquid cooling pipeline used to transport coolant to which module is leaking, and the leakage on-off valve on the leaking pipeline can be closed to reduce the impact on the liquid cooling pipeline of the data center and other areas.

[0043] Based on such a design concept, the embodiment of the present application provides a leakage detection method for a data center liquid cooling system, which is applied to a liquid cooling system of a data center; the data center includes multiple micromodules, each micromodule includes multiple data cabinets, and each data cabinet includes multiple servers; the liquid cooling system includes a liquid cooling pipeline, and the liquid cooling pipeline includes a main liquid pipeline for conveying cooling liquid to each micromodule, a branch liquid pipeline located in the micromodule and used for conveying cooling liquid to each data cabinet in the micromodule, and a connecting pipeline corresponding to each data cabinet and used for conveying cooling liquid to each server in the data cabinet, the main liquid pipeline, each branch liquid pipeline, and each connecting pipeline all include a liquid supply pipe and a liquid return pipe; the main liquid pipeline, each branch liquid pipeline, and each connecting pipeline each have a liquid supply pipe and a liquid return pipe respectively, and are provided with at least one liquid leakage detection position, and in case of leakage The liquid detection position is provided with a corresponding pressure difference sensing device and a leakage on-off valve; each pressure difference sensing device is used to detect the pressure difference between the liquid supply pipe and the liquid return pipe at the leakage detection position, and each leakage on-off valve is used to control the on-off of the liquid cooling pipeline corresponding to the leakage detection position; the leakage detection method comprises: detecting the pressure difference of each leakage detection position of the same main liquid pipeline, the same liquid distribution pipeline, and the same connecting pipeline by each pressure difference sensing device, and when the pressure difference sensing device detects that the pressure difference value of the leakage detection position where it is located is greater than the corresponding pressure difference threshold and is maintained for more than the corresponding time threshold, a detection signal is sent out, and based on the detection signal, it is determined whether the liquid cooling pipeline of the corresponding leakage detection position is leaking; when it is determined that the corresponding leakage detection position is leaking, the leakage on-off valve of the corresponding leakage detection position is closed.

[0044] Since the main liquid pipeline, each branch liquid pipeline and each connecting pipeline each have at least one leakage detection position in their respective liquid supply pipes and liquid return pipes, and corresponding pressure difference sensors and leakage on-off valves are provided at the leakage detection positions, it is possible to determine which specific pipeline among the main liquid pipeline, each branch liquid pipeline and each connecting pipeline is leaking through the pressure difference sensor, thereby improving the detection accuracy of the leakage area; and when it is determined that the pipeline is leaking, the leakage on-off valve at the leakage position can be closed to stop the liquid inlet and outlet of the leaking pipeline without closing the on-off valve of the entire liquid cooling pipeline, thereby reducing the impact of the leakage area on the liquid cooling pipelines in the data center and other areas, and the liquid cooling pipeline used to transport cooling liquid to other modules can operate normally, thereby reducing the impact of the leakage pipeline on the liquid cooling pipelines in the data center and other areas.

[0045] The data center liquid cooling system in this application is a technology that uses liquid as a cooling medium to remove the heat generated by server components and dissipate it into the external environment through direct contact or indirect heat exchange.

[0046] The leakage detection method of the data center liquid cooling system of the present application is applicable to the primary side water system and / or the secondary side water system.

[0047] The leakage detection method for a data center liquid cooling system according to an embodiment of the present application can be applied to various forms of liquid cooling servers, such as a cold plate liquid cooling server.

[0048] Below, refer to Figures 1 to 3 Some embodiments of the present application are described in detail.

[0049] Figure 1 A schematic diagram of the structure of a data center liquid cooling system provided for some embodiments of the present application; Figure 2 Some embodiments of the present application provide Figure 1 A magnified schematic diagram of region A; Figure 3 Some embodiments of the present application provide Figure 1 Schematic diagram of the enlarged area B.

[0050] The embodiments of the present application are implemented through the following technical solutions.

[0051] The present application provides a method for detecting a liquid leakage in a liquid cooling system of a data center. The method is applied to a liquid cooling system of a data center. Figures 1 to 3As shown, the data center includes a plurality of micromodules 1, each micromodule 1 includes a plurality of data cabinets 2, each data cabinet 2 includes a plurality of servers 3; the liquid cooling system includes a liquid cooling pipeline, the liquid cooling pipeline includes a main liquid pipeline 4 for conveying cooling liquid to each micromodule 1, a liquid distribution pipeline 5 located in the micromodule 1 and used for conveying cooling liquid to each data cabinet 2 in the micromodule 1, and a connecting pipeline 6 corresponding to each data cabinet 2 and used for conveying cooling liquid to each server 3 in the data cabinet 2, the main liquid pipeline 4, each liquid distribution pipeline 5, and each connecting pipeline 6 all include a liquid supply pipe and a liquid return pipe; the liquid supply pipe and the liquid return pipe of the main liquid pipeline 4, each liquid distribution pipeline 5, and each connecting pipeline 6 respectively have at least one liquid leakage detection position, and corresponding pressure difference sensing devices 71 and liquid leakage sensing devices are provided at the liquid leakage detection positions. On-off valve 72; each pressure differential sensing device is used to detect the pressure difference between the liquid supply pipe and the liquid return pipe at the leakage detection position, and each leakage on-off valve 72 is used to control the on-off of the liquid cooling pipeline corresponding to the leakage detection position; the leakage detection method includes: detecting the pressure difference of each leakage detection position of the same main liquid pipeline 4, the same liquid distribution pipeline 5, and the same connecting pipeline 6 through each pressure differential sensing device 71, and when the pressure differential sensing device 71 detects that the pressure difference value at the leakage detection position where it is located is greater than the corresponding pressure differential threshold and is maintained for more than the corresponding time threshold, a detection signal is sent out, and based on the detection signal, it is determined whether the liquid cooling pipeline at the corresponding leakage detection position is leaking; when it is determined that the corresponding leakage detection position is leaking, the leakage on-off valve 72 at the corresponding leakage detection position is closed.

[0052] In some embodiments, in order to improve the detection accuracy of the leakage area, the data center is divided into zones. The data center may include multiple micromodules 1. Of course, the data center may also include one micromodule 1. The specific number of micromodules 1 is determined according to the actual distribution structure of the data center, and this application does not make any specific restrictions here. Figure 1 As shown, the area within the dotted box O1 is divided into a micromodule 1 area, and the micromodule 1 includes multiple data cabinets 2, for example, it may include two, three, four or more data cabinets 2; the area within the dotted box O2 is divided into a data cabinet 2 area, and the data cabinet 2 may include multiple servers 3, for example, it may include two, three, four or more servers 3; the micromodule 1 may also include a liquid cooling distribution unit (CDU), wherein the liquid cooling distribution unit (CDU) is used to transport cooling liquid.

[0053] In some embodiments, the liquid cooling system has a liquid cooling pipeline. The liquid cooling pipeline includes a main liquid pipeline 4, a liquid separation pipeline 5, and a connecting pipeline 6, wherein the main liquid pipeline 4 has a main liquid supply pipe 41 and a main liquid return pipe 42; the liquid separation pipeline 5 has a liquid separation supply pipe 51 and a liquid separation return pipe 52; and the connecting pipeline 6 has a connecting liquid supply pipe 61 and a connecting liquid return pipe 62.

[0054] In a specific embodiment, Figure 1 As shown, according to the flow direction of the coolant, the coolant flows from the water inlet of the main liquid pipeline 4 into the main liquid supply pipe 41, and then flows from the main liquid supply pipe 41 into the liquid supply pipe 51 after being processed by the liquid cooling distribution unit 8 (CDU), and then flows from the liquid supply pipe 51 into the connecting supply pipe 61. The coolant cools the server 3, absorbs the heat generated by the server 3, and the temperature of the coolant increases; the coolant that has cooled the server 3 flows into the connecting return pipe 62, and then flows into the liquid return pipe 52, and flows into the main liquid return pipe 42 after being processed by the liquid cooling distribution unit 8 (CDU), and finally flows out from the main liquid return pipe 42. In the liquid cooling system, due to the connection sealing and equipment aging, leakage and other conditions are prone to occur at the connection between pipes.

[0055] In some embodiments, there is a leakage detection position in each of the main liquid supply pipe 41, the main liquid return pipe 42, the separate liquid supply pipe 51, the separate liquid return pipe 52, the connecting liquid supply pipe 61, and the connecting liquid return pipe 62, and a corresponding pressure difference sensor device 71 and a leakage on-off valve 72 are arranged at the leakage detection position.

[0056] In the present application, each leakage on-off valve is used to control the on-off of the liquid cooling pipeline corresponding to the leakage detection position, which may refer to the on-off of the pipeline or pipeline segment with a leakage detection position. For example, a leakage detection position is provided on the connecting pipeline. When leakage of the connecting pipeline is detected, the leakage on-off valve is closed, and the connecting pipeline with leakage stops liquid inflow and outflow.

[0057] In the present application, the differential pressure sensing device 71 can be arranged in such a way that the liquid supply pipe and the liquid return pipe in the same main liquid pipeline 4, the same liquid separation pipeline 5 or the same connecting pipeline 6 are connected by a pipeline, and the differential pressure sensing device 71 is arranged in the pipeline, so that the differential pressure sensing device 71 can detect the pressure difference between the liquid supply pipe and the liquid return pipe in the same main liquid pipeline 4, the same liquid separation pipeline 5 or the same connecting pipeline 6; the differential pressure sensing device 71 can also be arranged in such a way that pressure sensors are respectively arranged in the liquid supply pipe and the liquid return pipe of the same main liquid pipeline 4, the same liquid separation pipeline 5 or the same connecting pipeline 6, and the pressure difference between the liquid supply pipe and the liquid return pipe of the same main liquid pipeline 4, the same liquid separation pipeline 5 or the same connecting pipeline 6 is determined according to the pressure values ​​detected by the pressure sensors on the liquid supply pipe and the liquid return pipe.

[0058] For example, Figure 1As shown, when there is no leakage in the server 3, there is a certain pressure difference between the liquid supply pipe and the liquid return pipe in the same pipeline, and the pressure of the liquid supply pipe is greater than the pressure of the liquid return pipe. At this time, there is an initial pressure difference between the liquid supply pipe and the liquid return pipe. In the case of leakage in the liquid cooling system, the pressure in the pipeline is released and the liquid is lost, which will cause the pressure difference between the liquid supply pipe and the liquid return pipe to increase further, that is, the pressure difference sensor device 71 will sense the increase in the pressure difference between the liquid supply pipe and the liquid return pipe. When the pressure difference is greater than the corresponding pressure difference threshold and is maintained for more than the corresponding time threshold, the pressure difference sensor device sends a detection signal, and determines whether the corresponding pipeline is leaking based on the detection signal. When it is determined that the corresponding pipeline is leaking, the leakage on-off valve 72 of the corresponding pipeline is closed, and the liquid inflow and outflow are stopped at the leakage position of the leaking pipeline.

[0059] The leakage detection method of the embodiment of the present application is particularly suitable for large-flow leakage caused by rupture of the pipe interface in the liquid cooling system. Since the pressure release inside the liquid cooling system is more obvious and the pressure drop is larger in the case of large-flow leakage, the pressure difference between the liquid supply pipe and the liquid return pipe changes more obviously.

[0060] In a specific embodiment, in the same pipeline, a pressure differential sensor 71 and a leakage on-off valve 72 are arranged near the liquid inlet of the liquid supply pipe and near the liquid outlet of the return pipe. The position of the pressure differential sensor 71 is the leakage detection position. When the pressure differential sensor 71 detects that the pressure differential value of the pipeline where it is located is greater than the pressure differential threshold and is maintained for more than the time threshold, a detection signal is sent out, and based on the detection signal, it is determined whether the corresponding pipeline has a leakage. When it is determined that the corresponding pipeline has a leakage, the leakage on-off valve 72 of the pipeline is closed, and the leakage point of the leaking pipeline stops inletting and outlet of liquid. The method for determining whether the pipeline has a leakage is described in detail below.

[0061] It should be noted that the pressure difference thresholds in pipelines of different levels are different, and the pressure difference thresholds in pipelines of different levels are at least 1.1 times the pressure difference value when the pipeline is not leaking. The duration threshold is approximately 30 seconds or more. This application does not make specific restrictions on the pressure difference threshold and its corresponding duration threshold, which should be determined based on the actual situation of the liquid cooling system.

[0062] In some embodiments, the leakage detection position in a certain pipeline (such as the main liquid pipeline 4, the liquid distribution pipeline 5 or the connecting pipeline 6) can be close to the liquid inlet and / or liquid outlet of this pipeline, or it can be at a distance from the liquid inlet and / or liquid outlet of this pipeline.

[0063] Since each of the liquid supply pipe and the liquid return pipe of the main liquid pipeline 4, each liquid branch pipeline 5, and each connecting pipeline 6 has at least one leakage detection position, and corresponding pressure difference sensing devices 71 and leakage on-off valves 72 are provided at the leakage detection positions, it is possible to determine which specific pipeline among the main liquid pipeline 4, each liquid branch pipeline 5, and each connecting pipeline 6 may have leakage through the pressure difference sensing device 71, thereby improving the detection accuracy of the leakage area; and when it is determined that the pipeline is leaking, the leakage on-off valve 72 at the leakage position can be closed to stop the liquid inlet and outlet of the leaking pipeline without closing the on-off valve of the entire liquid cooling pipeline, thereby reducing the impact of the leakage area on the liquid cooling pipelines in the data center and other areas, and the liquid cooling pipeline used to transport cooling liquid to other modules can operate normally, thereby reducing the impact of the leakage pipeline on the liquid cooling pipelines in the data center and other areas.

[0064] The following is a method for determining whether the communication pipe 6 is leaking.

[0065] In some embodiments, Figure 1 and Figure 3 As shown, the pressure difference sensing device includes a first pressure difference sensing device 711 arranged in the connecting pipe 6. The position of the first pressure difference sensing device 711 is a first leakage detection position. When the first pressure difference sensing device 711 sends a first detection signal, it is determined that the connecting pipe 6 corresponding to the first leakage detection position is leaking, and the leakage on-off valve 72 of the connecting pipe 6 determined to be leaking is closed.

[0066] Figure 1 Only some of the communicating pipes are shown to be provided with the first differential pressure sensor device 711 and the liquid leakage on-off valve 72 , but all communicating pipes may have the first differential pressure sensor device 711 and the liquid leakage on-off valve 72 .

[0067] In a specific embodiment, Figure 1 As shown, a first differential pressure sensing device 711 and a liquid leakage on-off valve 72 are provided in a position near the water inlet of the connecting liquid supply pipe 61 of the connecting pipe 6 and in a position near the water outlet of the connecting liquid return pipe 62 of the connecting liquid return pipe 62. When the first differential pressure sensing device 711 detects that the pressure difference between the connecting liquid supply pipe 61 and the connecting liquid return pipe 62 of the connecting pipe 6 where it is located is greater than the corresponding first differential pressure threshold and is maintained for more than the corresponding first time threshold, a first detection signal is sent out to determine that the connecting pipe 6 is leaking, and the liquid leakage on-off valve 72 of the connecting pipe 6 is closed, and the connecting pipe 6 stops taking in and out of liquid.

[0068] Since leakage in the connecting pipe 6 has less impact on the liquid cooling system than leakage in pipes of other levels, the impact of system false alarms on the liquid cooling system is smaller. Therefore, it is possible to determine whether the connecting pipe 6 is leaking based only on the change in the pressure difference value.

[0069] The connecting pipe 6 is not provided with other types of sensors, which can save costs. Moreover, when the connecting pipe 6 leaks, only the leakage on-off valve 72 of the leaking connecting pipe 6 is closed, which can minimize the impact on the normal inflow and outflow of other connecting pipes 6, the liquid distribution pipe 5 and / or the main liquid pipe 4, thereby reducing the impact of the leakage on the liquid cooling system.

[0070] The following is a method for determining whether the liquid separation pipe 5 is leaking.

[0071] In some embodiments, Figure 1 and Figure 2 As shown, the liquid separation pipeline 5 is formed by a plurality of liquid separation pipeline sections connected in sequence, each liquid separation pipeline section is connected to at least one connecting pipeline 6, and a second pressure difference sensor device 712 is provided at a position located on the upstream side of the corresponding connecting pipeline 6 in each liquid separation pipeline section for liquid supply and at a position located on the downstream side of the corresponding connecting pipeline 6 in each liquid separation pipeline section for liquid return. The position where the second pressure difference sensor device is located is a second leakage detection position, and the second pressure difference sensor device 712 is used to send a second detection signal.

[0072] Figure 1 Only some of the liquid separation pipeline sections are provided with the second pressure difference sensor device 712 and the liquid leakage on-off valve 72 , but each liquid separation pipeline section may have the second pressure difference sensor device 712 and the liquid leakage on-off valve 72 .

[0073] In some embodiments, the liquid distribution pipeline 5 is formed by a plurality of liquid distribution pipeline segments connected in series. In the embodiment of the present application, the pipeline segment between two adjacent virtual lines L1 is a liquid distribution pipeline segment, and one liquid distribution pipeline segment transports cooling liquid for one data cabinet 2 .

[0074] In some embodiments, each liquid separation pipe segment is connected to at least one connecting pipe 6, and each liquid separation pipe segment can be directly connected to one or more connecting pipes 6. The number of directly connected connecting pipes 6 in each liquid separation pipe segment can be the same or different. It should be noted that the direct connection between the connecting pipe 6 and the liquid separation pipe segment means that the cooling liquid can flow directly from the liquid separation pipe segment into the connecting pipe 6, and the cooling liquid does not need to flow from the liquid separation pipe segment through other liquid separation pipe segments and then flow into the connecting pipe 6.

[0075] In a specific embodiment, Figure 1As shown, a second pressure difference sensing device 712 and a leakage on-off valve 72 are provided at a position near the water inlet of the liquid supply pipe section in the liquid supply pipe section of the liquid separation pipeline section and at a position near the water outlet of the liquid return pipe section in the liquid return pipe section. When the second pressure difference sensing device 712 detects that the pressure difference value of the liquid separation pipeline section where it is located is greater than the corresponding second pressure difference threshold and is maintained for more than the corresponding second time threshold, a second detection signal is issued. Among them, a leakage on-off valve 72 is provided between two adjacent liquid separation pipeline sections, that is, a leakage on-off valve 72 is provided at both ends of the liquid separation pipeline section along the flow direction of the coolant. When it is determined that the liquid separation pipeline section is leaking, the leakage on-off valves 72 at both ends of the liquid separation pipeline section determined to be leaking can be closed.

[0076] Therefore, only the leakage on-off valve 72 of the leaking liquid separation pipeline section can be closed, which can minimize the impact on the normal inflow and outflow of other connecting pipelines 6, liquid separation pipeline sections and / or main liquid pipeline 4, thereby reducing the impact of the leakage on the liquid cooling system.

[0077] In some embodiments, Figure 1 and Figure 2 As shown, for each liquid separation pipeline segment and the connecting pipeline 6 connected thereto, when the first pressure difference sensor device 711 does not send out a first detection signal and the second pressure difference sensor device 712 sends out a second detection signal, it is determined whether the liquid separation pipeline segment corresponding to the second pressure difference sensor device 712 that sends out the second detection signal is leaking; when it is determined that the liquid separation pipeline segment is leaking, the leakage on-off valve 72 of the liquid separation pipeline segment determined to be leaking is closed.

[0078] A certain liquid separation pipeline section and the connecting pipeline 6 connected to it are analyzed. When the first pressure difference sensor device 711 does not send out the first detection signal, but the second pressure difference sensor device 712 sends out the second detection signal, it is necessary to further determine whether the liquid separation pipeline section is leaking. This is because the liquid separation pipeline section is greatly affected by the cooling load of the liquid cooling system. If the power of the data cabinet 2 used by the liquid separation pipeline section to transport the cooling liquid increases, the temperature difference between the supply temperature and the return temperature in the liquid separation pipeline section may increase. The increase in the temperature difference between the supply temperature and the return temperature may cause the pressure in the liquid separation return pipe section of the liquid separation pipeline section to decrease, thereby causing the pressure difference between the liquid separation supply pipe 51 and the liquid separation return pipe 52 to increase. The pressure difference may further exceed the second pressure difference threshold, thereby causing a false alarm. Therefore, when the second detection signal is sent, it is necessary to further determine whether the liquid separation pipeline section is leaking.

[0079] In a specific embodiment, Figure 1As shown, a second pressure difference sensing device 712 and a leakage on-off valve 72 are provided in the liquid supply pipe section of the liquid separation pipeline section, near the water inlet of the liquid separation supply pipe section, and in the liquid return pipe section, near the water outlet of the liquid separation return pipe section. When the second pressure difference sensing device 712 detects that the pressure difference between the liquid separation supply pipe section and the liquid separation return pipe section in the liquid separation pipeline section where it is located is greater than the corresponding second pressure difference threshold and is maintained for more than the corresponding second time threshold, a second detection signal is issued, and when the first detection signal is not issued, it is determined whether the liquid separation pipeline section is leaking. If it is determined that the liquid separation pipeline section is leaking, the leakage on-off valve 72 of the liquid separation pipeline section is closed, and the liquid separation pipeline section stops taking in and out liquid.

[0080] Therefore, only the leakage on-off valve 72 of the leaking liquid separation pipeline section can be closed according to the second detection signal, which can minimize the impact on the normal inflow and outflow of other connecting pipelines 6, liquid separation pipeline sections and / or main liquid pipeline 4, thereby reducing the impact of the leakage on the liquid cooling system.

[0081] In some embodiments, Figure 1 and Figure 2 As shown, the micromodule 1 also includes a plurality of liquid cooling distribution units 8, each of which is connected between the main liquid pipeline 4 and each liquid distribution pipeline 5. The liquid cooling distribution unit includes a water pump. A corresponding temperature difference sensor device 73 is also provided at each second leakage detection position. In response to the second detection signal, the power of the water pump connected in series with the second detection position is increased. If the temperature difference sensor device 73 located at the second leakage detection position detects that the temperature difference between the supply pipe and the return pipe of the liquid distribution pipeline section corresponding to the second detection position is within the specified temperature range, and the power of the data cabinet 2 corresponding to the liquid distribution pipeline 5 where the second detection position is located is within the specified power range, it is determined that the liquid distribution pipeline section corresponding to the second detection position is leaking, and the leakage on-off valve 72 of the liquid distribution pipeline section determined to be leaking is closed.

[0082] The temperature difference sensing device 73 is used to detect the temperature difference between the liquid supply pipe and the liquid return pipe of the liquid separation pipeline section corresponding thereto, and the temperature difference refers to the temperature difference between the liquid supply pipe of the liquid separation pipeline section and the temperature return pipe of the liquid separation pipeline section. The temperature difference sensing device 73 can be a temperature difference sensor.

[0083] Figure 1 It is shown that only some of the liquid separation pipeline sections are provided with the temperature difference sensor 73 , but each liquid separation pipeline section may have the temperature difference sensor 73 .

[0084] In some embodiments, the cooling liquid in the main liquid supply pipe 41 flows through the liquid cooling distribution unit 8 (CDU) and flows into the branch liquid supply pipe 51, and the cooling liquid in the branch liquid return pipe 52 that has been used to cool the server 3 flows through the liquid cooling distribution unit (CDU) and flows into the main liquid return pipe 42.

[0085] like Figure 1 As shown, in a specific embodiment, in the same micromodule 1, both ends of the liquid distribution supply pipe 51 are connected to the liquid cooling distribution unit (CDU), and both ends of the liquid distribution return pipe 52 are connected to the liquid cooling distribution unit (CDU). Therefore, when a certain liquid distribution pipeline section leaks, and the leaking liquid on-off valve 72 is closed to stop the liquid inflow and outflow of the leaking liquid distribution pipeline section, the normal circulation of the coolant in other liquid distribution pipeline sections can be avoided as much as possible.

[0086] In some embodiments, there may be one or two liquid cooling distribution units (CDUs), etc.

[0087] In a specific embodiment, in the same micromodule 1, when the first detection signal is not issued and the second detection signal is issued, the power of the water pump connected in series with the second detection position is increased, thereby increasing the flow rate of the coolant in the liquid separation pipe section corresponding to the second detection position, and the power of the data cabinet 2 used to transport the coolant with the liquid separation pipe section is within a specified power range, wherein the specified power means that before and after the water pump power is increased, the power of the data cabinet 2 remains substantially unchanged (the power of the data cabinet 2 may fluctuate slightly), and the temperature difference between the liquid supply pipe and the liquid return pipe of the liquid separation pipe section is within a specified temperature range, wherein the specified temperature range means that the temperature difference between the liquid supply pipe and the liquid return pipe of the liquid separation pipe section remains unchanged or increases, then the liquid separation pipe section corresponding to the second detection position is judged to be leaking, the leakage on-off valve 72 of the liquid separation pipe section judged to be leaking is closed, and the leaking liquid separation pipe section stops taking in and out liquid.

[0088] Therefore, based on the second detection signal, the temperature difference between the liquid supply pipe and the liquid return pipe of the liquid separation pipe section can be detected according to the temperature difference sensor device 73 to determine whether the liquid separation pipe section is leaking, thereby improving the detection accuracy of the leakage area of ​​the liquid separation pipe section.

[0089] The following is a method for determining whether the main liquid pipeline 4 is leaking.

[0090] In some embodiments, Figure 1 As shown, the main liquid pipeline 4 is formed by a plurality of main liquid pipeline sections connected in sequence, each main liquid pipeline section is connected to at least one liquid separation pipeline 5, and a third pressure difference sensing device 713 is provided at a position located at the upstream side of the corresponding liquid separation pipeline 5 in each main liquid pipeline section for liquid supply and at a position located at the downstream side of the corresponding liquid separation pipeline 5 in each main liquid pipeline section for liquid return. The position where the third pressure difference sensing device 713 is located is a third liquid leakage detection position, and the third pressure difference sensing device 713 is used to send a third detection signal.

[0091] In some embodiments, the main liquid pipeline 4 is formed by multiple main liquid pipeline sections connected in series. In the embodiment of the present application, the pipeline section between two adjacent dotted lines L2 is a main liquid pipeline section, and one main liquid pipeline section transports cooling liquid for one micromodule 1.

[0092] In some embodiments, each main liquid pipeline segment is connected to at least one liquid separation pipeline 5, and each main liquid pipeline segment can be directly connected to one or more liquid separation pipelines 5. The number of liquid separation pipelines 5 directly connected in each main liquid pipeline segment can be the same or different. It should be noted that the direct connection between the liquid separation pipeline 5 and the main liquid pipeline segment means that the cooling liquid can flow directly from the main liquid pipeline segment into the liquid separation pipeline 5, and the cooling liquid does not need to flow from the main liquid pipeline segment through other main liquid pipeline segments into the liquid separation pipeline 5.

[0093] In a specific embodiment, Figure 1 As shown, a third pressure difference sensing device 713 and a leakage on-off valve 72 are provided at a position near the water inlet of the main liquid supply pipe section in the main liquid supply pipe section and at a position near the water outlet of the main liquid return pipe section in the main liquid return pipe section. When the third pressure difference sensing device 713 detects that the pressure difference between the main liquid supply pipe section and the main liquid return pipe section in the main liquid pipeline section where it is located is greater than the corresponding third pressure difference threshold and is maintained for more than the corresponding third time threshold, a third detection signal is issued. Among them, a leakage on-off valve 72 is provided between two adjacent main liquid pipeline sections, that is, a leakage on-off valve 72 is provided at both ends of the main liquid pipeline section along the flow direction of the coolant. When it is determined that the main liquid pipeline section is leaking, the leakage on-off valves 72 at both ends of the main liquid pipeline section that is determined to be leaking can be closed.

[0094] Thus, only the leakage on-off valve 72 of the leaking main liquid pipeline section can be closed, which can minimize the impact on the normal inflow and outflow of other connecting pipelines 6, liquid separation pipelines 5, main liquid pipeline sections and / or main liquid pipelines 4, thereby reducing the impact of the leakage on the liquid cooling system.

[0095] In some embodiments, Figure 1 As shown, for each main liquid pipeline section and the liquid distribution pipeline 5 connected thereto, when the first pressure difference sensor device 711 does not send out a first detection signal and the second pressure difference sensor device 712 does not send out a second detection signal, and the third pressure difference sensor device 713 sends out a third detection signal, it is determined whether the main liquid pipeline section corresponding to the third pressure difference sensor device 713 that sends out the third detection signal is leaking; when it is determined that the main liquid pipeline section is leaking, the leakage on-off valve 72 of the main liquid pipeline section determined to be leaking is closed.

[0096] A certain main liquid pipeline section and the liquid distribution pipeline 5 connected to it are analyzed. When the first pressure difference sensor device 711 does not send out the first detection signal and the second pressure difference sensor device 712 does not send out the second detection signal, but the third pressure difference sensor device 713 sends out the third detection signal, it is necessary to further determine whether the main liquid pipeline section is leaking. This is because the main liquid pipeline section is prone to blockage, especially the primary side water cooling system is more prone to blockage. Therefore, when the main liquid pipeline section is blocked, the pressure of the main liquid return pipe 42 will be reduced, and the pressure difference between the main liquid supply pipe 41 and the main liquid return pipe 42 will increase. The further pressure difference may exceed the third pressure difference threshold, thereby causing a false alarm. Therefore, when the third detection signal is sent, it is necessary to further determine whether the main liquid pipeline section is leaking.

[0097] In a specific embodiment, Figure 1 As shown, a third pressure difference sensing device 713 and a leakage on-off valve 72 are provided at a position near the water inlet of the main liquid supply pipe section in the main liquid supply pipe section and at a position near the water outlet of the main liquid return pipe section in the main liquid return pipe section. When the third pressure difference sensing device 713 detects that the pressure difference of the main liquid pipeline section where it is located is greater than the corresponding third pressure difference threshold and is maintained for more than the corresponding third time threshold, a third detection signal is sent out, and when the first detection signal and the second detection signal are not sent out, it is determined whether the main liquid pipeline section is leaking. If it is determined that the main liquid pipeline section is leaking, the leakage on-off valve 72 of the main liquid pipeline section is closed, and the main liquid pipeline section stops taking in and out liquid.

[0098] Therefore, only the leakage on-off valve 72 of the leaking main liquid pipeline section can be closed according to the third detection signal, which can minimize the impact on the normal inflow and outflow of liquid in other connecting pipelines 6, liquid separation pipelines 5, main liquid pipeline sections and / or main liquid pipelines 4, thereby reducing the impact of the leakage on the liquid cooling system.

[0099] In some embodiments, a corresponding flow sensor device 74 is further provided at each third leakage detection position located on the liquid supply pipe. If the flow sensor device 74 located at the third leakage detection position of the liquid supply pipe detects that the flow of the main liquid pipeline section corresponding to the third detection position reaches the target flow, the main liquid pipeline section corresponding to the third detection position is determined to be leaking, and the leakage on-off valve 72 of the main liquid pipeline section determined to be leaking is closed.

[0100] The flow sensing device 74 is used to detect the flow rate of the pipeline in which it is located. The flow sensing device 74 can be a flow sensor.

[0101] like Figure 1As shown, in a specific embodiment, both ends of the main liquid supply pipe 41 are connected to the water inlet, and both ends of the liquid return pipe 52 are connected to the water outlet. Therefore, when a certain section of the main liquid pipeline leaks, and the leakage on-off valve 72 is closed to stop the inflow and outflow of the leaking main liquid pipeline section, the normal circulation of the coolant in other main liquid pipeline sections can be minimized.

[0102] In some embodiments, a flow sensor device 74 is provided at a position near the water inlet of the main liquid supply pipe section in the main liquid supply pipe section. This is because the flow in the main liquid pipeline 4 is relatively large, so if the flow in the main liquid pipeline 4 is significantly lower than the target flow (for example, the target flow can be 50% of the flow value when the main liquid pipeline is not leaking), it may be due to the blockage of the main liquid pipeline 4, which increases the pressure difference between the main liquid supply pipe section and the main liquid return pipe section in the main liquid pipeline section. In addition, the flow sensor device 74 is relatively expensive, so the present application can only set the flow sensor device 74 in the main liquid pipeline section.

[0103] In a specific embodiment, in the same micromodule 1 and its corresponding main liquid pipeline segment, when the first detection signal and the second detection signal are not issued and the third detection signal is issued, the flow sensor device 74 detects that the flow of the main liquid pipeline segment corresponding to the flow sensor device 74 is lower than or equal to the target flow, then the main liquid pipeline segment corresponding to the flow sensor device 74 is determined to be leaking, and the leakage on-off valve 72 of the main liquid pipeline segment determined to be leaking is closed, and the leaking main liquid pipeline segment stops taking in and out liquid.

[0104] Therefore, based on the third detection signal, the flow rate of the main liquid supply pipe 41 can be detected by the flow sensor device 74 to determine whether the main liquid pipeline section is leaking, thereby improving the detection accuracy of the leakage area of ​​the main liquid pipeline section.

[0105] In some embodiments, the target flow rate is in the range of 40% to 70% of the rated flow rate.

[0106] The rated flow rate refers to the flow value when the main liquid pipeline section is not leaking. Of course, the rated flow rate fluctuates within a certain range.

[0107] Optionally, the target flow rate may be 40%, 45%, 50%, 55%, 60%, 65% or 70% of the rated flow rate, etc.

[0108] Limiting the target flow rate within this range can reduce the probability of false alarms due to flow fluctuations and further improve the detection accuracy of the leakage area in the main liquid pipeline section.

[0109] In some embodiments, a corresponding flow sensor device 74 and a corresponding filter sensor 75 are further provided at each third leakage detection position located in the liquid supply pipe. The filter sensor 75 is configured to detect whether the pipeline is blocked. If the flow sensor device 74 located at the third leakage detection position of the liquid supply pipe detects that the flow of the main liquid pipeline section corresponding to the third detection position is greater than the target flow and the filter sensor 75 located at the third leakage detection position detects that the main liquid pipeline section is not blocked, it is determined that the main liquid pipeline section corresponding to the third detection position is leaking, and the leakage on-off valve 72 of the main liquid pipeline section determined to be leaking is closed.

[0110] In some embodiments, a filter sensor 75 is provided in the main liquid supply pipe section at a position close to the water inlet of the main liquid supply pipe section.

[0111] In a specific embodiment, in the same micromodule 1 and its corresponding main liquid pipeline segment, when the first detection signal and the second detection signal are not issued and the third detection signal is issued, the flow sensor device 74 detects that the flow of the main liquid pipeline segment corresponding to the flow sensor device 74 is greater than the target flow, but the filter sensor 75 detects that the main liquid pipeline segment corresponding to the filter sensor 75 is not blocked, then it is determined that the main liquid pipeline segment corresponding to the flow sensor device 74 and / or the filter sensor 75 is leaking, and the leakage on-off valve 72 of the main liquid pipeline segment determined to be leaking is closed, and the leaking main liquid pipeline segment stops taking in and out liquid.

[0112] Therefore, based on the third detection signal, it is possible to jointly determine whether the main liquid pipeline section is leaking according to the flow sensor device 74 and the filter sensor 75, thereby improving the detection accuracy of the leakage area of ​​the main liquid pipeline section.

[0113] In a specific embodiment, the pressure difference sensor device 71 is located near the liquid inlet and outlet of each pipeline or pipeline segment, and detects the pressure difference of each pipeline or pipeline segment (main liquid pipeline segment, liquid distribution pipeline segment and connecting pipeline 6) in real time. If there is a problem with the pressure difference of connecting pipeline 6, it is directly judged that there is leakage; this is because the pipeline closer to the liquid inlet of the liquid cooling system, such as the main liquid pipeline 4, has a larger impact area after leakage, and more stringent conditions are required for judgment. Therefore, the pressure difference threshold and time threshold of the pipeline closer to the liquid inlet of the liquid cooling system must be greater than the pressure difference threshold and time threshold of the pipeline farther away from the liquid inlet of the liquid cooling system, and the impact area of ​​the leakage of connecting pipeline 6 is smaller, and the impact of false alarms is also relatively small. In addition, for connecting pipeline 6, the reason for not performing flow judgment is that the cost of flow sensor device 74 is relatively high, so flow sensor device 74 is usually set in the pipeline close to the liquid inlet of the liquid cooling system, and in actual scenarios, flow sensor device 74 may not be set in each pipeline or pipeline segment.

[0114] The pressure difference threshold may be a value by which the outlet pressure is lower than the inlet pressure as a percentage of the rated pressure of the region, and the specific value range of the percentage is determined according to the actual situation of the liquid cooling system.

[0115] If there is a problem with the pressure difference of the liquid separation pipeline 5, the water pump power is increased to see whether the supply and return water temperature difference of the liquid separation pipeline 5 increases. If the temperature difference is normal and the load power of the server 3 does not increase significantly during this period, it is determined that there is a leak in the liquid separation pipeline 5. When the second pressure difference sensor 712 corresponding to the liquid separation pipeline 5 sends a second detection signal, if the first pressure difference sensor 711 corresponding to each connecting pipeline 6 does not send a first detection signal at this time, it means that there is a leak in the annular pipeline of the liquid separation pipeline 5. The reason for re-inspection of the liquid separation pipeline 5 is that the pressure of the liquid separation pipeline 5 is greatly affected by the cooling load of the system. If the load power increases suddenly, the return water temperature difference becomes larger, causing the pressure of the liquid separation return pipe 52 to decrease to a certain extent, thereby increasing the pressure difference between the liquid separation supply pipe 51 and the liquid separation return pipe 52, causing a false alarm, and it is also easier to operate when the water pump power is increased in the liquid separation pipeline 5, and it will not affect other liquid separation pipelines 5.

[0116] If there is a problem with the pressure difference of the main liquid pipeline 4, it is detected whether the current flow rate of the main liquid pipeline 4 reaches the target flow rate. If it reaches the target flow rate, it is judged that there is leakage; if it does not reach it, the filter sensor 75 in the corresponding area is used to detect whether it is blocked. If it is not blocked, it is judged that there is leakage. The prerequisite is that the third pressure difference sensor device 713 corresponding to the main liquid pipeline 4 sends a third detection signal, and the second pressure difference sensor device 712 corresponding to the liquid separation pipeline 5 does not send a second detection signal, and the first pressure difference sensor device 711 corresponding to each connecting pipeline 6 does not send a first detection signal, then it means that there is leakage in the annular pipeline of the liquid separation pipeline 5.

[0117] This is because the flow in the main liquid pipeline 4 is relatively large. Therefore, if the overall operating flow is significantly lower than the target flow (the target flow can be a certain percentage of the rated flow), a slight blockage may cause the pressure of the main liquid return pipe 42 to be significantly lower than the pressure of the main liquid supply pipe 41. On the contrary, if the flow is large, the effect of the blockage on the pressure is relatively small. The reason for the blockage re-inspection here is that the main liquid pipeline 4 is primary side water, which is itself more prone to blockage.

[0118] Turn off the leakage on-off valves at both ends of the pipeline or pipeline section where leakage is determined.

[0119] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the present application.

Claims

1. A method for detecting liquid leakage in a liquid cooling system of a data center, characterized in that: A liquid cooling system applied to a data center; the data center includes a plurality of micromodules, each of the micromodules includes a plurality of data cabinets, and each of the data cabinets includes a plurality of servers; The liquid cooling system includes a liquid cooling pipeline, which includes a main liquid pipeline for conveying cooling liquid to each micromodule, a liquid distribution pipeline located in the micromodule and used to convey cooling liquid to each data cabinet in the micromodule, and a connecting pipeline corresponding to each data cabinet and used to convey cooling liquid to each server in the data cabinet, wherein the main liquid pipeline, each liquid distribution pipeline, and each connecting pipeline include a liquid supply pipe and a liquid return pipe; The main liquid pipeline, each of the liquid distribution pipelines, and each of the liquid supply pipes and liquid return pipes of the connecting pipelines are respectively provided with at least one liquid leakage detection position, and corresponding pressure difference sensing devices and liquid leakage on-off valves are provided at the liquid leakage detection positions; each of the pressure difference sensing devices is respectively used to detect the pressure difference between the liquid supply pipe and the liquid return pipe at the liquid leakage detection position, and each of the liquid leakage on-off valves is used to control the on-off of the liquid cooling pipeline corresponding to the liquid leakage detection position; The liquid leakage detection method comprises: The pressure difference at each leakage detection position of the same main liquid pipeline, the same liquid separation pipeline, and the same connecting pipeline is detected by each of the pressure difference sensing devices. When the pressure difference sensing device detects that the pressure difference value at the leakage detection position where it is located is greater than the corresponding pressure difference threshold and is maintained for more than the corresponding time threshold, a detection signal is issued, and based on the detection signal, it is determined whether the liquid cooling pipeline at the corresponding leakage detection position is leaking; When it is determined that leakage occurs at the corresponding leakage detection position, the leakage on-off valve at the corresponding leakage detection position is closed.

2. The liquid leakage detection method according to claim 1, characterized in that: The pressure difference sensing device comprises a first pressure difference sensing device arranged in the communicating pipe, and the position of the first pressure difference sensor is a first liquid leakage detection position. When the first differential pressure sensor sends a first detection signal, it is determined that the communicating pipe corresponding to the first leakage detection position is leaking, and the leakage on-off valve of the communicating pipe determined to be leaking is closed.

3. The liquid leakage detection method according to claim 2, characterized in that: The liquid separation pipeline is formed by connecting a plurality of the liquid separation pipeline segments in sequence, and each of the liquid separation pipeline segments is connected to at least one of the connecting pipelines. A second pressure differential sensing device is arranged at a position located on the upstream side of the corresponding connecting pipeline in each of the liquid separation pipeline segments for liquid supply and at a position located on the downstream side of the corresponding connecting pipeline in each of the liquid separation pipeline segments for liquid return. The position where the second pressure differential sensing device is located is a second liquid leakage detection position, and the second pressure differential sensing device is used to send a second detection signal.

4. The liquid leakage detection method according to claim 3, characterized in that: For each of the liquid separation pipeline segments and the connecting pipeline connected thereto, when the first differential pressure sensor device does not send out a first detection signal and the second differential pressure sensor device sends out a second detection signal, determine whether the liquid separation pipeline segment corresponding to the second differential pressure sensor device that sends out the second detection signal has leakage; When it is determined that the liquid separation pipeline section is leaking, the liquid leakage on-off valve of the liquid separation pipeline section determined to be leaking is closed.

5. The liquid leakage detection method according to claim 4, characterized in that: The micromodule further includes a plurality of liquid cooling distribution units, each of which is connected between the main liquid pipeline and each of the liquid distribution pipelines, and each of which includes a water pump. A corresponding temperature difference sensor device is also provided at each of the second liquid leakage detection positions. In response to the second detection signal, the power of the water pump connected in series with the second detection position is increased. If the temperature difference sensor device located at the second leakage detection position detects that the temperature difference between the liquid supply pipe and the liquid return pipe of the liquid distribution pipeline section corresponding to the second detection position is within a specified temperature range, and the power of the data cabinet corresponding to the liquid distribution pipeline where the second detection position is located is within a specified power range, It is determined that the liquid separation pipeline section corresponding to the second detection position is leaking, and the leakage on-off valve of the liquid separation pipeline section determined to be leaking is closed.

6. The liquid leakage detection method according to claim 5, characterized in that: The main liquid pipeline is formed by a plurality of main liquid pipeline sections connected in sequence, each of the main liquid pipeline sections is connected to at least one of the liquid separation pipelines, and a third pressure differential sensing device is provided at a position located on the upstream side of the corresponding liquid separation pipeline in each of the main liquid pipeline sections for liquid supply and at a position located on the downstream side of the corresponding liquid separation pipeline in each of the main liquid pipeline sections for liquid return. The position of the third pressure differential sensing device is a third liquid leakage detection position, and the third pressure differential sensing device is used to send a third detection signal.

7. The liquid leakage detection method according to claim 6, characterized in that: For each of the main liquid pipeline sections and the liquid separation pipelines connected thereto, when the first differential pressure sensor does not send out a first detection signal and the second differential pressure sensor does not send out a second detection signal, and the third differential pressure sensor sends out a third detection signal, determine whether the main liquid pipeline section corresponding to the third differential pressure sensor that sends out the third detection signal has leakage; When it is determined that the main liquid pipeline section is leaking, the leakage on-off valve of the main liquid pipeline section determined to be leaking is closed.

8. The method for detecting liquid leakage according to claim 7, characterized in that: A corresponding flow sensor device is also provided at each of the third liquid leakage detection positions located on the liquid supply pipe. If the flow sensor device located at the third leakage detection position of the liquid supply pipe detects that the flow of the main liquid pipeline section corresponding to the third detection position reaches the target flow, the main liquid pipeline section corresponding to the third detection position is determined to be leaking, and the leakage on-off valve of the main liquid pipeline section determined to be leaking is closed.

9. The liquid leakage detection method according to claim 8, characterized in that: The target flow rate is in the range of 40% to 70% of the rated flow rate.

10. The liquid leakage detection method according to claim 7, characterized in that: A corresponding flow sensor device and a corresponding filter sensor are also provided at each of the third liquid leakage detection positions located in the liquid supply pipe. The filter sensor is configured to detect whether the pipe is blocked. If the flow sensor device located at the third leakage detection position of the liquid supply pipe detects that the flow of the main liquid pipeline section corresponding to the third detection position is greater than the target flow and the filter sensor located at the third leakage detection position detects that the main liquid pipeline section is not blocked, then it is determined that the main liquid pipeline section corresponding to the third detection position is leaking, and the leakage on-off valve of the main liquid pipeline section determined to be leaking is closed.

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