Static pressure exhaust mechanism and liquid cooling CDU system

Abstract

The utility model provides a static pressure exhaust mechanism and a liquid cooling CDU system, and belongs to the technical field of liquid cooling. The static pressure exhaust mechanism comprises a static pressure exhaust tank arranged on a working medium flow path and an exhaust valve connected with the static pressure exhaust tank. The static pressure exhaust tank is provided with a liquid inlet and a liquid outlet, a working medium flowing in the working medium flow path flows in from the liquid inlet of the static pressure exhaust tank and flows out from the liquid outlet of the static pressure exhaust tank, and the static pressure exhaust tank is used for gathering gas in the working medium; and the exhaust valve is used for exhausting gas in the static pressure exhaust tank. According to the static pressure exhaust mechanism and the liquid cooling CDU system comprising the static pressure exhaust mechanism, residual gas at all positions in the system can be effectively exhausted, and the performance of the system can be improved.

Description

Technical Field

[0001] This application relates to the field of liquid cooling technology, and particularly to a static pressure exhaust mechanism and a liquid cooling CDU system. Background Art

[0002] A liquid cooling system uses a liquid as the circulating working medium (referred to as the working fluid). Due to the high heat capacity and high heat conduction performance of the liquid, the heat generated by the internal components of the electronic device is transferred outside the device through the liquid flow, so that the heat-generating components of the electronic device are cooled to ensure that the electronic device operates within a safe temperature range.

[0003] For the CDU (Cooling Distribution Units) system in the liquid cooling system, especially the cabinet-type CDU system, it has a large water capacity, and it is necessary to timely discharge the gas in the circulating working fluid. Otherwise, it is easy to affect the heat exchange effect of the entire system, and at the same time, it will also cause cavitation to the impeller of the circulating pump, shortening the life of the circulating pump. Therefore, how to effectively discharge the gas in the working fluid circulation loop is crucial for improving the performance of the liquid cooling CDU system. Summary of the Utility Model

[0004] To solve the above-mentioned existing technical problems, this application provides a static pressure exhaust mechanism and a liquid cooling CDU system that can effectively discharge the residual gas at various places in the working fluid flow path.

[0005] According to the first aspect of the embodiments of the present application, a static pressure exhaust mechanism is provided, including a static pressure exhaust tank provided on the working fluid flow path and an exhaust valve connected to the static pressure exhaust tank;

[0006] The static pressure exhaust tank has a liquid inlet and a liquid outlet. The working fluid flowing in the working fluid flow path flows into the static pressure exhaust tank from the liquid inlet and flows out from the liquid outlet of the static pressure exhaust tank. The static pressure exhaust tank is used to gather the gas in the working fluid;

[0007] The exhaust valve is used to discharge the gas in the static pressure exhaust tank.

[0008] Optionally, the exhaust valve includes an automatic exhaust valve and / or a manual exhaust valve respectively connected to the static pressure exhaust tank.

[0009] Optionally, the exhaust valve further includes a regular exhaust valve for regularly exhausting the static pressure exhaust tank.

[0010] Optionally, the regular exhaust valve is a normally closed solenoid valve that is regularly opened based on the control of a controller.

[0011] Optionally, it further includes a maintenance valve provided between the regular exhaust valve and the static pressure exhaust tank;

[0012] During the period when the maintenance valve is in the open state, the regular exhaust valve exhausts the static pressure exhaust tank regularly.

[0013] During the period when the maintenance valve is in the closed state, the gas path between the regular exhaust valve and the static pressure exhaust tank is blocked.

[0014] Optionally, the maintenance valve is a ball valve.

[0015] Optionally, the exhaust valve includes the automatic exhaust valve, the manual exhaust valve, and the regular exhaust valve.

[0016] The automatic exhaust valve, the manual exhaust valve, and the regular exhaust valve are arranged in sequence along the flow direction of the working medium in the static pressure exhaust tank.

[0017] Optionally, the first height is greater than the second height. The first height is the position height of the connection between the exhaust valve and the static pressure exhaust tank, and the second height is the liquid level height of the working medium in the static pressure exhaust tank. According to the second aspect of the embodiments of the present application, a CDU system is provided. The static pressure exhaust mechanism as described in any one of the above is provided on the working medium circulation loop of the CDU system. The static pressure exhaust mechanism is used to gather the gas in the working medium circulation loop and discharge the gathered gas to the outside of the working medium circulation loop.

[0018] Optionally, the static pressure exhaust mechanism is provided on the liquid return flow path of the working medium circulation loop.

[0019] The static pressure exhaust mechanism provided by the embodiments of the present application buffers the flow of the working medium through the static pressure exhaust tank provided on the working medium flow path, concentrates and gathers the gas in the working medium flow path, and then discharges the gas gathered in the static pressure exhaust tank to the outside of the static pressure exhaust tank through the exhaust valve connected to the static pressure exhaust tank. The gas at the dead corner positions that may exist in the working medium flow path will also be gathered by the static pressure exhaust tank first and then discharged by the exhaust valve. Therefore, the static pressure exhaust mechanism provided by the embodiments of the present application can effectively discharge the gas at various positions in the working medium flow path and effectively avoid the problem that the gas at the dead corners in the working medium flow path cannot be discharged.

[0020] In the liquid-cooled CDU system provided by the embodiments of the present application, the working medium circulating in the working medium circulation loop enters the static pressure exhaust tank of the static pressure exhaust mechanism from the liquid inlet of the static pressure exhaust mechanism. Based on the hydrostatic pressure, the static pressure exhaust tank gathers the gas in the working medium circulation loop and discharges the gathered gas through the exhaust valve, thereby realizing the discharge of the gas at various positions in the working medium circulation loop of the liquid-cooled CDU system to the outside of the pipeline, effectively avoiding the problem that the dead corner gas in the liquid-cooled CDU system cannot be discharged, and thus avoiding the adverse effects on the liquid-cooled CDU system. Description of the Drawings

[0021] The accompanying drawings are only used to illustrate the embodiments and are not considered as limitations to the present utility model. Moreover, throughout the drawings, the same reference signs are used to represent the same components. In the drawings:

[0022] Figure 1 FIG. is a schematic structural diagram of a static pressure exhaust mechanism provided according to some embodiments of the present application;

[0023] Figure 2 FIG. is a schematic structural diagram of a liquid-cooled CDU system provided according to some embodiments of the present application.

[0024] Reference signs:

[0025] 1 - Static pressure exhaust mechanism; 11 - Static pressure exhaust tank; 12 - Automatic exhaust valve; 13 - Manual exhaust valve; 14 - Regular exhaust valve; 15 - Maintenance valve; 2 - Circulation pump; 3 - Heat exchanger; 4 - Equipment to be cooled. Specific embodiments

[0026] The technical solution of the present application will be further described in detail below with reference to the accompanying drawings of the specification and specific embodiments.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the implementation of this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] In the following description, the expression "some embodiments" is used, which describes a subset of possible embodiments. However, it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0029] The liquid cooling system includes two parts: the outdoor side and the indoor side. Among them, the outdoor side part includes a cooling tower, a primary side pipe network, and a primary side coolant; the indoor side part includes a CDU, a liquid cooling cabinet, ICT (Information and Communications Technology) equipment, a secondary side pipe network, and a secondary side coolant. The outdoor side is an external cold source, usually a chiller, a cooling tower, or an air cooler outdoors, and the heat transfer is mainly achieved through the rise and fall of the water temperature. The indoor side includes a liquid supply loop and internal flow channels in electronic devices (such as servers), and the heat transfer is mainly achieved through the rise and fall of the coolant temperature. Heat exchange between the indoor side and the outdoor side is carried out through a plate heat exchanger in the CDU. The liquid cooling CDU system transports the working medium to electronic devices that need to be cooled, such as IT heating devices like servers and memories, through a series of pipes and circulation pumps. When the working medium flows through these electronic devices, it will come into direct contact with the heat source, absorb and carry away the generated heat. Subsequently, the warm working medium is transported to the heat exchanger for heat dissipation treatment, and then returns to the working medium supply system through the pipes, forming a cyclic heat dissipation process.

[0030] In the process of research, the inventors of this application found that the existing exhaust method of connecting an exhaust valve to the liquid inlet pipe or the liquid return pipe of the working medium in the liquid cooling CDU system is difficult to discharge the gas in some stubborn dead corners. The gas that is not discharged in time affects the actual operation of the entire system as the working medium circulates.

[0031] The exhaust method is to install an automatic exhaust valve and a manual exhaust valve at the highest position or a local high position of the system. This method is a relatively common exhaust method in the industry at present. However, it is difficult to discharge the gas in some stubborn dead corners because the liquid cooling CDU system is not simply a pipeline connection and there will be inevitable dead corners. These gases that are not discharged in time will, along with long-term operation, cause cavitation of the impeller of the circulation pump as these small bubbles flow at high speed with the working medium. At the same time, when these gases flow to the plate heat exchanger in the liquid cooling CDU system, it will also reduce its heat exchange performance. Based on this, the inventors of this application provide a static pressure exhaust mechanism that can effectively discharge the gas at various places in the flow path to avoid the phenomenon that the gas in the dead corners is difficult to discharge. The static pressure exhaust mechanism provided in the embodiments of this application can be used in the liquid cooling system to discharge the gas in the pipelines of the liquid cooling system, especially in the liquid cooling CDU system to effectively discharge the gas at various places in the pipelines of the liquid cooling CDU system, avoid adverse effects of the gas on the circulation pump in the liquid cooling CDU system, and avoid reducing the heat exchange performance of the plate heat exchanger in the liquid cooling CDU system. It should be noted that the static pressure exhaust mechanism provided in the embodiments of this application is not limited to being applied in the liquid cooling CDU system, and it can be applied to other liquid path systems that need to discharge the gas in the flow path.

[0032] Figure 1Schematic diagram of a static pressure exhaust mechanism 11 provided according to some embodiments of the present application. In some embodiments, the static pressure exhaust mechanism 11 provided by the present application includes a static pressure exhaust tank 11 provided on the working fluid flow path and an exhaust valve connected to the static pressure exhaust tank 11. The static pressure exhaust tank 11 has a liquid inlet A1 and a liquid outlet A2. The working fluid flowing in the working fluid flow path flows into the static pressure exhaust tank 11 from the liquid inlet A1 and flows out from the liquid outlet A2 of the static pressure exhaust tank 11. The static pressure exhaust tank 11 is used to gather the gas in the working fluid. The exhaust valve is used to discharge the gas in the static pressure exhaust tank 11.

[0033] The working fluid flow path refers to the liquid path system for transporting the working fluid, and the working fluid refers to the working medium of the liquid path system. Taking the liquid-cooled CDU system as an example of the liquid path system, the working fluid refers to the coolant circulating in the system. The static pressure exhaust tank 11 being provided on the working fluid flow path means that the static pressure exhaust tank 11 forms a series connection relationship with other components on the working fluid flow path, such that the working fluid flowing in the working fluid flow path passes through the static pressure exhaust tank 11. The working fluid flow path can be a circulation loop of the working fluid in the liquid path system, such as the liquid-cooled circulation loop including a circulation pump and a heat exchanger in the liquid-cooled system.

[0034] The static pressure exhaust tank 11 refers to a liquid container with a certain volume that can separate the gas in the working fluid based on the hydrostatic pressure of the fluid. The liquid inlet A1 and the liquid outlet A2 of the static pressure exhaust tank 11 are respectively connected to the pipelines for transporting the working fluid. The cross-section of the static pressure exhaust tank 11 in the direction of the working fluid flow is larger than the cross-section of the pipeline for transporting the working fluid, and in the direction perpendicular to the working fluid flow, the liquid inlet A1 and the liquid outlet A2 are respectively lower than the top of the inner wall of the static pressure exhaust tank 11, such that when the working fluid flows through the static pressure exhaust tank 11, there is still a certain space between the working fluid liquid level and the top of the inner wall. The working fluid flows into the static pressure exhaust tank 11 through the liquid inlet A1 and generates hydrostatic pressure to separate the gas in the working fluid from the working fluid and enter the space between the working fluid liquid level and the top of the inner wall of the static pressure exhaust tank 11. This space is communicated with the outside of the static pressure exhaust tank 11 through the open exhaust valve, thereby discharging the gas from the static pressure exhaust tank 11. The exhaust valve is provided on the outer wall of the static pressure exhaust tank 11, specifically on the outer wall on the side where the above space is located. When the exhaust valve is in the open state, the inside of the static pressure exhaust tank 11 is communicated with the outside, and the gas in the static pressure exhaust tank 11 is discharged.

[0035] In the embodiment of the present application, the static pressure exhaust mechanism 1 buffers the flow of the working medium through the static pressure exhaust tank 11 provided on the working medium flow path, concentrates and accumulates the gas in the working medium flow path, and then discharges the gas accumulated in the static pressure exhaust tank 11 to the outside of the static pressure exhaust tank 11 through the exhaust valve connected to the static pressure exhaust tank 11. Due to the gas concentration effect of the static pressure exhaust tank 11, the gas at the dead-end positions that may exist in the working medium flow path will also be first accumulated by the static pressure exhaust tank 11 and then discharged by the exhaust valve. Specifically, for this exhaust problem, the static pressure exhaust mechanism 1 is arranged at a place where the gas is more likely to accumulate in the working medium flow path, which is more conducive to centrally collecting the gas in the working medium flow path and then discharging it. Therefore, the static pressure exhaust mechanism 1 provided by the embodiment of the present application can effectively discharge the gas at various places in the working medium flow path, effectively avoiding the problem that the gas at the dead-end of the working medium flow path cannot be discharged.

[0036] Please continue to refer to Figure 1 As shown, in some embodiments, the exhaust valve in the static pressure exhaust mechanism 1 includes an automatic exhaust valve 12. The automatic exhaust valve 12 automatically opens when the working medium is transmitted and operated in the system where the working medium flow path is located, and remains open during the operation of the system where the working medium flow path is located, so as to continuously discharge the gas in the static pressure exhaust tank 11 automatically. By adopting the automatic exhaust valve 12, the exhaust method is simple and labor costs can be reduced.

[0037] Please continue to refer to Figure 1 As shown, in some embodiments, the exhaust valve in the static pressure exhaust mechanism 1 further includes a manual exhaust valve 13. The manual exhaust valve 13 can be manually opened during the liquid injection (injecting the working medium) of the system where the working medium flow path is located, so as to manually discharge the gas in the static pressure exhaust tank 11. During the liquid injection of the system where the working medium flow path is located before the working medium is transmitted and operated in the system, based on the opening of the manual exhaust valve 13, the gas in the flow path when the system where the working medium flow path is located starts to transmit and operate the working medium can be effectively reduced, which is beneficial to improving the performance of the system where the working medium flow path is located. In other embodiments, the automatic exhaust valve 12 and the manual exhaust valve 13 can also be respectively arranged in the static pressure exhaust mechanism 1, which will not be elaborated here.

[0038] Please continue to refer to Figure 1 As shown, in some embodiments, the exhaust valve in the static pressure exhaust mechanism 1 further includes a regular exhaust valve 14. The regular exhaust valve 14 opens regularly according to the set time during the working medium transmission and operation of the system where the working medium flow path is located, so as to regularly discharge the gas in the static pressure exhaust tank 11, and discharge the stubborn small bubbles in the system where the working medium flow path is located to ensure the stable operation of the system where the working medium flow path is located.

[0039] In some embodiments, the exhaust valve in the static pressure exhaust mechanism 1 includes an automatic valve 12, a manual exhaust valve 13, and a regular exhaust valve 14. During the liquid injection at the system where the working fluid flow path is located, the manual exhaust valve 13 is opened based on manual control to exhaust the gas in the static pressure exhaust tank 11. During the working fluid transmission operation of the system where the working fluid flow path is located, the automatic exhaust valve 12 automatically opens to continuously exhaust the static pressure exhaust tank 11. The regular exhaust valve 14 is regularly opened during the working fluid transmission operation of the system where the working fluid flow path is located, and can still achieve the regular discharge of the gas in the static pressure exhaust tank 11 when the automatic exhaust valve 12 fails due to reasons such as blocked holes. Therefore, the static pressure exhaust mechanism 1 provided in some embodiments of the present application can achieve manual and automatic linkage adjustment of exhaust based on the automatic exhaust valve 12, the manual exhaust valve 13, and the regular exhaust valve 14, and can effectively improve the exhaust effect of the static pressure exhaust mechanism 1 to discharge the residual gas at various places in the working fluid flow path to the outside of the system where the working fluid flow path is located.

[0040] In some embodiments, the regular exhaust valve 14 is a solenoid valve whose switching state is controlled, specifically a normally closed solenoid valve that is regularly opened based on the control of a controller. Specifically, the static pressure exhaust structure 1 further includes a controller, which is used to regularly send an opening control signal during the working fluid transmission operation of the system where the working fluid flow path is located to control the regular opening of the regular exhaust valve 14. By adding a solenoid valve as the regular exhaust valve 14 in the exhaust valve of the static pressure exhaust mechanism 1 to be regularly opened under the control of the controller for exhaust, the problem of abnormal exhaust caused by the failure of the automatic exhaust valve 12 is effectively solved.

[0041] Please continue to refer to Figure 1 As shown, in some embodiments, the static pressure exhaust structure 1 further includes a maintenance valve 15 provided between the regular exhaust valve 14 and the static pressure exhaust tank 11. During the period when the maintenance valve 15 is in the open state, the regular exhaust valve 14 regularly exhausts the static pressure exhaust tank 11; during the period when the maintenance valve 15 is in the closed state, the gas path between the regular exhaust valve 14 and the static pressure exhaust tank 11 is blocked. The maintenance valve 15 can play a maintenance role. When the regular exhaust valve 14 needs to be disassembled and maintained, the maintenance valve 15 can be closed, which is convenient for disassembling and assembling the regular exhaust valve 14.

[0042] As an optional implementation manner, the maintenance valve 15 can be a ball valve. Since the structure of the ball valve is simple, the relative volume is small, and the weight is light, it is beneficial to reduce the overall volume of the static pressure exhaust mechanism 1 and increase the application scenarios of the static pressure exhaust mechanism 1.

[0043] Please continue to refer to Figure 1As shown, in some embodiments, the automatic exhaust valve 12, the manual exhaust valve 13, and the regular exhaust valve 14 are arranged in sequence along the flow direction of the working fluid in the static pressure exhaust tank 11. That is, the distances between the automatic exhaust valve 12, the manual exhaust valve 13, and the regular exhaust valve 14 and the liquid inlet A1 increase in sequence. Setting the automatic exhaust valve 12 at the relatively front end of the working fluid flow path and setting the regular exhaust valve 14 at the relatively rear end of the working fluid flow path is more conducive to the regular exhaust valve 14 exhausting the residual gas in the system where the working fluid flow path is located when the automatic exhaust valve 12 fails due to blocked holes or the like.

[0044] In some embodiments, the position height of the connection between the exhaust valve and the static pressure exhaust tank 11 is defined as the first height, and the height of the working fluid liquid level in the static pressure exhaust tank 11 is defined as the second height. To improve the exhaust effect of the exhaust valve, the first height is set to be greater than the second height, that is, the position where the exhaust valve is connected to the static pressure exhaust tank 11 is set higher than the height of the working fluid liquid level in the static pressure exhaust tank 11 when the working fluid flows through the static pressure exhaust tank 11. Specifically, please refer to Figure 1 As shown, the exhaust valve is connected to the top of the outer wall of the static pressure exhaust tank 11. Among them, the top and bottom of the static pressure exhaust tank 11 are two opposite parts in the direction perpendicular to the working fluid flow direction.

[0045] Please refer to Figure 2 As shown, it is a schematic structural diagram of a liquid-cooled CDU system provided according to some embodiments of the present application. The working fluid circulation loop of the liquid-cooled CDU system provided according to some embodiments of the present application is provided with a static pressure exhaust mechanism 1 provided according to any one of the embodiments of the present application. The static pressure exhaust mechanism 1 is used to gather the gas in the working fluid circulation loop and discharge the gathered gas to the outside of the working fluid circulation loop.

[0046] In the liquid-cooled CDU system provided according to some embodiments of the present application, the working fluid circulating in the working fluid circulation loop enters the static pressure exhaust tank 11 of the static pressure exhaust mechanism 1 from the liquid inlet A1 of the static pressure exhaust mechanism 1, so that the static pressure exhaust tank 11 gathers the gas in the working fluid circulation loop based on the hydrostatic pressure and discharges the gathered gas through the exhaust valve, thereby realizing the discharge of the gas at various parts of the working fluid circulation loop of the liquid-cooled CDU system to the outside of the pipeline, effectively avoiding the problem that there is dead corner gas in the liquid-cooled CDU system that cannot be discharged, and thus avoiding the adverse effects on the liquid-cooled CDU system.

[0047] Please refer to Figure 2As shown, the liquid-cooled CDU system further includes a circulation pump 2 and a heat exchanger 3. The static pressure exhaust structure 1, the circulation pump 2, and the heat exchanger 3 are connected in series to form a working fluid circulation loop for liquid-cooling the electronic device 4 to be cooled. In some embodiments, the liquid-cooled CDU system may specifically be a cabinet-type CDU. The liquid-cooled CDU system provided in the embodiments of the present application can achieve the same technical effects as the static pressure exhaust mechanism 1 provided in the embodiments of the present application, and will not be elaborated here.

[0048] Please continue to refer to Figure 2 As shown, in some embodiments, the static pressure exhaust mechanism 1 is provided on the return liquid flow path of the working fluid circulation loop. Among them, the return liquid flow path refers to the working fluid flow path in which the working fluid flows out of the electronic device 4 to be cooled and flows to the heat exchanger 3. Setting the static pressure exhaust mechanism 1 at the highest point or a local high point of the liquid-cooled CDU system is beneficial to improving the exhaust effect of the static pressure exhaust mechanism 1 on the working fluid circulation loop of the liquid-cooled CDU, thereby improving the performance of the liquid-cooled CDU.

[0049] In summary, in some embodiments, the static pressure exhaust mechanism 1 provided in the embodiments of the present application and the liquid-cooled CDU system including the same effectively gather the gas in the liquid-cooled CDU system by setting a static pressure exhaust tank 11 on the working fluid flow path, and discharge it outside the liquid-cooled CDU system through an automatic exhaust valve 12. At the same time, by adding a periodic valve 14 to be opened regularly, the residual gas in the system can also be effectively discharged when the automatic exhaust valve 12 fails, ensuring the stable operation of the system.

[0050] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A static pressure exhaust mechanism, characterized in that: It includes a static pressure exhaust tank arranged on the working medium flow path and an exhaust valve connected to the static pressure exhaust tank; The static pressure exhaust tank has a liquid inlet and a liquid outlet, the working medium flowing in the working medium flow path flows into the static pressure exhaust tank from the liquid inlet and flows out from the liquid outlet of the static pressure exhaust tank, and the static pressure exhaust tank is used to gather the gas in the working medium; The exhaust valve is used to exhaust the gas in the static pressure exhaust tank.

2. The static pressure exhaust mechanism according to claim 1, characterized in that: The exhaust valve comprises an automatic exhaust valve and / or a manual exhaust valve respectively connected to the static pressure exhaust tank.

3. The static pressure exhaust mechanism according to claim 2, characterized in that: The exhaust valve further includes a periodic exhaust valve for periodically exhausting the static pressure exhaust tank.

4. The static pressure exhaust mechanism according to claim 3, characterized in that: The periodic exhaust valve is a normally closed solenoid valve that is periodically opened based on the control of a controller.

5. The static pressure exhaust mechanism according to claim 3, characterized in that: Also included is a service valve disposed between the periodic exhaust valve and the static pressure exhaust tank; When the inspection valve is in the open state, the periodic exhaust valve periodically exhausts the static pressure exhaust tank; When the inspection valve is in the closed state, the gas path between the periodic exhaust valve and the static pressure exhaust tank is blocked.

6. The static pressure exhaust mechanism according to claim 5, characterized in that: The inspection valve is a ball valve.

7. The static pressure exhaust mechanism according to claim 3, characterized in that: The exhaust valve includes the automatic exhaust valve, the manual exhaust valve and the periodic exhaust valve; The automatic exhaust valve, the manual exhaust valve and the periodic exhaust valve are arranged in sequence along the flow direction of the working medium in the static pressure exhaust tank.

8. The static pressure exhaust mechanism according to any one of claims 1 to 7, characterized in that: The first height is greater than the second height, the first height is the height of the position of the connection between the exhaust valve and the static pressure exhaust tank, and the second height is the height of the working medium liquid level in the static pressure exhaust tank.

9. A liquid-cooled CDU system, characterized in that: The working fluid circulation loop of the liquid-cooled CDU system is provided with a static pressure exhaust mechanism as described in any one of claims 1 to 8, and the static pressure exhaust mechanism is used to gather the gas in the working fluid circulation loop and discharge the gathered gas to the outside of the working fluid circulation loop.

10. The liquid-cooled CDU system according to claim 9, characterized in that: The static pressure exhaust mechanism is arranged on the liquid return flow path of the working medium circulation loop.

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