Online replacement and maintenance device for distribution unit of liquid cooling system

Abstract

The utility model relates to the field of refrigeration equipment, in particular to an online replacement and maintenance device for a distribution unit of a liquid cooling system, which is used for solving the problem that operation of a corresponding server needs to be stopped when a cabinet distribution unit needs to be disassembled for maintenance. The device comprises a temporary replacement distribution unit, the temporary replacement distribution unit is provided with a first connector and a plurality of second connectors, one end of the temporary replacement distribution unit is provided with a temporary liquid supply port, and the other end of the temporary replacement distribution unit is provided with a liquid overflow port; the device further comprises an exhaust and liquid storage unit and a liquid conveying unit, the exhaust and liquid storage unit is connected with the liquid conveying unit, and the liquid overflow opening, the exhaust and liquid storage unit, the liquid conveying unit and the temporary liquid supply opening are sequentially connected through pipelines. And the control valve is arranged on a pipeline between the liquid conveying unit and the temporary liquid supply port. According to the online replacement and maintenance device for the distribution unit of the liquid cooling system, the distribution unit of the cabinet is replaced without stopping the server.

Description

Technical Field

[0001] The utility model relates to the field of refrigeration equipment, and more specifically to an online replacement and maintenance device for a distribution unit of a liquid cooling system. Background Art

[0002] With the rapid development of the digital age, the density of data centers is getting higher and higher, and the heat dissipation problem of cabinets is becoming increasingly prominent. At present, the better way to dissipate heat from cabinets is to use liquid cooling technology to remove the heat generated by the server through liquid.

[0003] For example, the cabinet heat dissipation liquid cooling system in the prior art mainly includes multiple liquid cooling servers, a cabinet liquid supply distribution unit and a cabinet liquid return distribution unit. Each liquid cooling server is provided with a liquid inlet and a liquid outlet. The cabinet distribution unit is provided with multiple quick connector male or female heads. The liquid inlet and liquid outlet of the liquid cooling server are connected to one end of a hose. The other end of the hose is provided with a quick connector female or male head matching the quick connector of the cabinet distribution unit. The quick connector female or male head of the hose is connected to the male or female head of the quick connector of the cabinet distribution unit. The cabinet liquid supply distribution unit and the cabinet liquid return distribution unit are connected to the liquid supply main pipe and the liquid return main pipe respectively. When in operation, the cooling liquid flows from the liquid supply main pipe into the cabinet liquid supply distribution unit, and then flows into the liquid inlet of the liquid cooling server through the quick connector and the hose of the cabinet liquid supply distribution unit. The cooling liquid enters the liquid cooling server and flows out from the liquid outlet after absorbing heat, and finally is discharged into the liquid return main pipe through the cabinet liquid return distribution unit. The liquid cooling system directly directs the cooling liquid to the heat source. Since the specific heat capacity of liquid is greater than that of air, its heat dissipation efficiency is much higher than that of air cooling, effectively solving the heat dissipation problem of high-density servers.

[0004] However, this type of liquid cooling system also faces some challenges, one of which is the problem of dirty plugging at the quick connector. Since the quick connector between the liquid cooling server and the cabinet distribution unit has a very small diameter, once the transported liquid is contaminated or contains impurities, these impurities can easily accumulate at the quick connector, forming dirty plugging. Dirty plugging will affect the heat dissipation effect of the liquid cooling server. If it is not cleaned in time, it will cause server failure and have a serious impact on data center operations.

[0005] At present, when dealing with the problem of dirty and blocked cabinet allocation units, the common practice adopted by data centers is to stop the operation of the corresponding servers and dismantle the cabinet allocation units for cleaning and maintenance. This practice not only brings inconvenience to the normal operation of the data center, but also causes service interruption of the server, resulting in great economic losses. Utility Model Content

[0006] The utility model aims to overcome at least one defect (shortcoming) of the above-mentioned prior art and provides an online replacement and maintenance device for a liquid cooling system distribution unit, which is used to solve the problem that when the cabinet distribution unit of the liquid cooling cabinet needs to be removed for maintenance, the server in the corresponding cabinet needs to be stopped.

[0007] The technical solution adopted by the utility model is an online replacement and maintenance device for a liquid cooling system distribution unit, comprising a temporary replacement distribution unit, the temporary replacement distribution unit is provided with a first joint and a plurality of second joints, one end of the temporary replacement distribution unit is provided with a temporary liquid supply port, and the other end of the temporary replacement distribution unit is provided with an overflow port; the device also includes an exhaust liquid storage unit and a liquid delivery unit, the overflow port, the exhaust liquid storage unit, the liquid delivery unit and the temporary liquid supply port are sequentially connected through a pipeline;

[0008] A control valve is arranged in the pipeline between the liquid delivery unit and the temporary liquid supply port.

[0009] By setting up a temporary replacement distribution unit, the cabinet distribution unit to be maintained can be quickly replaced by the temporary replacement distribution unit to continue working, so that the cabinet distribution unit can be cleaned and maintained without stopping the operation of the server. At the same time, the exhaust liquid storage unit and the liquid delivery unit can exhaust the air in the temporary replacement distribution unit and fill the temporary replacement distribution unit with liquid before the temporary replacement distribution unit replaces the cabinet distribution unit to be maintained, thereby shortening the time for the liquid in the temporary replacement distribution unit to be delivered to the liquid-cooled server.

[0010] Furthermore, the temporary replacement dispensing unit comprises a liquid viewing structure, and the liquid viewing structure is transparent or translucent.

[0011] By providing a liquid viewing structure in the temporary replacement distribution unit, the liquid level in the temporary replacement distribution unit can be intuitively monitored, thereby making it more convenient to determine whether the gas in the temporary replacement distribution unit has been exhausted.

[0012] Specifically, the exhaust liquid storage unit includes a liquid storage tank, which is provided with a third joint and a liquid outlet, the third joint of the liquid storage tank is connected to the overflow port through a pipeline, and the liquid outlet of the liquid storage tank is connected to the liquid delivery unit through a pipeline.

[0013] The liquid in the liquid storage tank provides a liquid replenishment source for the temporary replacement dispensing unit. Meanwhile, the liquid storage tank can receive the liquid overflowing from the overflow port of the temporary replacement dispensing unit by being connected to the overflow port.

[0014] Furthermore, the liquid delivery unit comprises a liquid infusion pump, an input end of the liquid infusion pump is connected to the liquid outlet, and an output end of the liquid infusion pump is connected to the temporary liquid supply port.

[0015] The rehydration pump provides power for delivering the liquid, and the rehydration pump can continuously and stably deliver the liquid to the temporary replacement distribution unit.

[0016] Furthermore, the control valve is a one-way valve, the inlet of the one-way valve is connected to the output end of the fluid infusion pump, and the outlet of the one-way valve is connected to the temporary fluid supply port.

[0017] The one-way valve allows liquid to be transported from the liquid replenishment pump to the temporary replacement distribution unit in a single direction, preventing the liquid from flowing back from the temporary replacement distribution unit to the liquid replenishment pump, making the liquid replenishment more stable and reliable.

[0018] Furthermore, it also includes a flow regulating valve, which is arranged in the pipeline between the liquid inlet and the control valve.

[0019] By setting the flow regulating valve in the pipeline between the liquid inlet and the control valve, the liquid flow in the pipeline can be accurately controlled; when the liquid inlet needs to be closed, the flow regulating valve can be closed first to cut off the delivery of the liquid in the pipeline, thereby avoiding liquid backflow and causing impact on the control valve.

[0020] Furthermore, the exhaust and liquid storage unit further comprises a liquid sight tube, which is arranged at one side of the liquid storage tank. The liquid storage tank is provided with a liquid discharge port, and the liquid discharge port is provided with a liquid discharge valve.

[0021] A sight glass is arranged on one side of the liquid storage tank, through which the liquid capacity in the liquid storage tank can be observed. When the liquid storage tank needs to be drained, the drain valve can be conveniently opened to drain the liquid from the drain port.

[0022] Furthermore, the second connector is a quick connector.

[0023] The quick connector can be installed quickly without the need for additional tools, saving installation and removal time.

[0024] Furthermore, the temporary replacement distribution unit is a vertical tube structure or a ring tube structure.

[0025] The temporary replacement distribution unit is made into a vertical tube structure, which has a simple structure and occupies little horizontal space, and is suitable for scenarios with limited horizontal space; the temporary replacement distribution unit is made into annular tube structure, which can disperse the load of the liquid in the temporary replacement distribution unit to the inner wall, thereby improving the strength of the temporary replacement distribution unit. At the same time, the curved shape of the annular tube structure occupies less vertical space than the vertical tube structure, and is suitable for scenarios with limited vertical space.

[0026] Furthermore, the flow regulating valve is a butterfly valve.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] (1) By setting up a temporary replacement distribution unit and quickly connecting the first connector of the temporary replacement distribution unit with the quick connector of the liquid cooling server through a pipeline, efficient replacement of the cabinet distribution unit to be replaced is achieved, thereby effectively avoiding the situation where the server needs to be shut down due to replacement of the distribution unit, thereby ensuring the continuous and stable operation of the server, reducing the risk of business interruption caused by downtime, and improving the reliability and stability of the liquid cooling system.

[0029] (2) By setting up a liquid delivery unit, the liquid in the exhaust liquid storage unit is continuously delivered to the temporary replacement distribution unit. During the delivery process, the liquid will discharge the air in the temporary replacement distribution unit from the overflow port, effectively preventing the air in the temporary replacement distribution unit from entering the pipeline of the liquid cooling system to form bubbles and block the flow of coolant, ensuring that the heat can be effectively removed, thereby enhancing the cooling stability of the liquid cooling system. At the same time, the exhaust liquid storage unit and the liquid delivery unit reduce the risk of pressure increase caused by air entering the liquid cooling system and accumulating by exhausting the air in the temporary replacement distribution unit, which helps prevent the pipeline of the liquid cooling system from rupturing or leaking due to excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the online replacement and maintenance device for the liquid cooling system distribution unit of this embodiment;

[0031] Figure 2 This is a schematic diagram of the structure of the temporary replacement allocation unit of this embodiment;

[0032] Figure 3 Schematic diagram of the structure of the exhaust liquid storage unit of this embodiment;

[0033] Figure 4 It is a schematic diagram of replacing a cabinet distribution unit with an online replacement maintenance device of a distribution unit of a liquid cooling system in this embodiment. DETAILED DESCRIPTION

[0034] The drawings of the present invention are only used for illustrative purposes and cannot be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0035] Example 1

[0036] The utility model of the online replacement and maintenance device for the liquid cooling system distribution unit can be applied to the liquid cooling cabinet to provide a temporary liquid supply system for the liquid cooling cabinet. Figure 4, shows an application example, the liquid cooling cabinet used includes several liquid cooling servers 10, a cabinet liquid supply distribution unit 13, a cabinet liquid return distribution unit 14 and multiple hoses 15. Each liquid cooling server 10 is provided with a first liquid supply joint 110 and a first liquid return joint 120, which are used for the input and output of liquid respectively; the cabinet liquid supply distribution unit 13 is provided with a main liquid supply connection port 131 and multiple second liquid supply joints 130, the cabinet liquid return distribution unit 14 is provided with a main liquid return connection port 141 and multiple second liquid return joints 140, the first liquid supply joint 110 of the liquid cooling server 10 is connected to the second liquid supply joint 130 of the cabinet liquid supply distribution unit 13 through a hose 15, and the first liquid return joint 120 of the liquid cooling server 10 is connected to the second liquid return joint 140 of the cabinet liquid return distribution unit 14 through another hose 15. Among them, the second liquid supply connector 130 and the second liquid return connector 140 are both quick connector male or female, one end of the hose 15 connected to the second liquid supply connector 130 is provided with a quick connector female or male matching with the second liquid supply connector 130, and one end of the other hose 15 connected to the second liquid return connector 140 is provided with a quick connector female or male matching with the second liquid return connector 140. The main liquid supply connection port 131 of the cabinet liquid supply distribution unit 13 is connected to the liquid supply connection main port 160 of the liquid supply main pipe 16 through a pipeline, and the main liquid return port 141 of the cabinet liquid return distribution unit 14 is connected to the liquid return connection main port 170 of the liquid return main pipe 17 through a connecting pipeline. In addition, the liquid supply main pipe 16 and the liquid return main pipe 17 are also respectively provided with a liquid supply reserved interface 161 and a liquid return reserved interface 171, and valves are respectively provided on the liquid supply reserved interface 161 and the liquid return reserved interface 171.

[0037] During operation, the cooling liquid in the liquid supply main pipe 16 first flows into the cabinet liquid supply distribution unit 13 through the pipeline, then flows into the liquid-cooled server 10 through the hose 15 via the first liquid supply connector 110 to take away the heat of the server and flows out from the first liquid return connector 120, and finally passes through the cabinet liquid return distribution unit 14 and is discharged to the liquid return main pipe 17.

[0038] Reference Figure 1 To Attachment Figure 3The embodiment of the utility model discloses an online replacement and maintenance device for a liquid cooling system distribution unit, comprising a temporary replacement distribution unit 200, an exhaust liquid storage unit 3, a liquid delivery unit 4, and a control valve 5. The temporary replacement distribution unit 200 is provided with a first joint 240, a plurality of second joints 250, a temporary liquid supply port 230, and an overflow port 210. The first joint 240 and the temporary liquid supply port 230 are arranged at one end of the temporary replacement distribution unit 200, and the overflow port 210 is arranged at the other end of the temporary replacement distribution unit 200. The first joint 240 and the temporary liquid supply port 230 are preferably arranged at the end of one end of the temporary replacement distribution unit 200, and the overflow port 210 is preferably arranged at the end of the other end of the temporary replacement distribution unit 200. The advantage of such arrangement is that no matter whether the temporary replacement distribution unit 200 is placed horizontally or tilted during use, the air in the temporary replacement distribution unit 200 can be pushed to the overflow port 210 and discharged from the overflow port 210 along with the flow of liquid. A switch (not shown in the figure) may also be provided on the overflow port 210 to facilitate closing the overflow port 210 when the dispensing unit 200 is temporarily replaced and does not need to be vented or replenished.

[0039] In this embodiment, the second joint 250 can be implemented by a quick joint, preferably an open-and-close quick joint, which has good sealing properties and can be disconnected or connected at will without liquid leakage.

[0040] In order to more conveniently and intuitively observe whether the air in the temporary replacement distribution unit 200 has been completely discharged, the temporary replacement distribution unit 200 also includes a liquid viewing structure 220. For example, the liquid viewing structure can be implemented by a liquid viewing tube, or the temporary replacement distribution unit can be made into a transparent or translucent structure. The liquid level and bubble conditions in the temporary replacement distribution unit 200 can be observed through the liquid viewing structure 220 to determine whether the air in the temporary replacement distribution unit 200 has been completely discharged.

[0041] The exhaust liquid storage unit 3 is used to provide liquid supply for the temporary replacement distribution unit 200. The exhaust liquid storage unit 3 includes a liquid storage tank 30, which has a third joint 315 and a liquid outlet 311. The third joint 315 is connected to the overflow port 210 of the temporary replacement distribution unit 200 through a pipeline, and the liquid outlet 315 is connected to the liquid delivery unit 4 through a pipeline. In order to facilitate observation of the liquid level in the liquid storage tank 30, a sight glass 314 can be provided on one side of the liquid storage tank 30. In order to facilitate the discharge of the liquid in the liquid storage tank 30, the liquid storage tank 30 is also provided with a liquid discharge port 312, and a liquid discharge valve 313 is provided at the outlet of the liquid discharge port 312.

[0042] The liquid delivery unit 4 is used to provide power for the liquid to be delivered from the exhaust liquid storage unit 3 to the temporary replacement distribution unit 200. The liquid delivery unit 4 includes a liquid delivery pump 40. In this embodiment, the liquid delivery pump 40 is implemented by a liquid infusion pump. The input end of the liquid infusion pump 40 is connected to the liquid outlet 311 of the liquid storage tank 30 through a pipeline, and the output end of the liquid infusion pump 40 is connected to the temporary liquid supply port 230 of the temporary replacement distribution unit 200 through a pipeline. In order to prevent the liquid in the temporary replacement distribution unit 200 from flowing back to the liquid infusion pump 40 and thus causing an impact on the liquid infusion pump 40, a control valve 5 is provided in the pipeline between the liquid delivery unit 4 and the liquid supply port 230 of the temporary replacement distribution unit 200. Specifically, the control valve 5 can be set as a one-way valve, and the one-way valve 5 can ensure that the liquid can only flow from the liquid infusion pump 40 to the temporary replacement distribution unit 200, so as to realize the liquid delivery in a single direction, thereby effectively avoiding the liquid from flowing back to the liquid infusion pump. In order to more flexibly control the liquid flow delivered by the liquid replenishment pump 40 to the temporary replacement distribution unit 200, a flow regulating valve 6 may be provided in the pipeline between the one-way valve 5 and the temporary replacement distribution unit 200, for example, a butterfly valve with adjustable opening.

[0043] In this embodiment, the temporary replacement distribution unit 200 can be set as a vertical tube structure or a ring tube structure. The temporary replacement distribution unit 200 of the vertical tube structure has a simple structure, has the advantages of convenient operation and material saving, but needs to occupy a certain vertical space; the temporary replacement distribution unit 200 is set as a ring, has the advantage of occupying a relatively small vertical space, and is suitable for occasions where the vertical space is limited. Of course, those skilled in the art can also set the temporary replacement distribution unit 200 to other shapes according to actual needs.

[0044] Reference Figure 4 In some embodiments, the liquid cooling system distribution unit online replacement and maintenance device further comprises a mounting bracket 7 disposed at the bottom of the liquid cooling system distribution unit online replacement and maintenance device, which is used to support and fix the entire device to ensure that it remains stable during operation. A plurality of wheels 8 may also be disposed at the bottom of the mounting bracket 7 to facilitate moving the entire device during daily use.

[0045] In specific applications, the liquid cooling system distribution unit online replacement and maintenance device of this embodiment can replace the cabinet liquid supply distribution unit 13 or the cabinet liquid return distribution unit 14 according to actual conditions, so that the replaced cabinet liquid supply distribution unit 13 or the cabinet liquid return distribution unit 14 can be cleaned and maintained.

[0046] Reference Figure 4 In actual application, the method of using the online replacement maintenance device of the liquid cooling system distribution unit of the present application to replace the cabinet liquid supply distribution unit 13 is as follows:

[0047] (1) Connect the first connector 240 of the temporary replacement distribution unit 200 to the reserved liquid supply interface 161 of the liquid-cooling liquid supply main pipe 16 through a hose.

[0048] (2) Open the control valve 5 and start the liquid replenishment pump 40 serving as the liquid delivery unit 4. At this time, the liquid replenishment pump 40 will continuously deliver the liquid in the liquid storage tank 30 to the temporary replacement distribution unit 200. In specific applications, if the delivery flow rate needs to be adjusted, it can be achieved by adjusting the flow control valve 6.

[0049] (3) Wait for a while to allow the liquid to fully flow into the temporary replacement dispensing unit 200. When you hear the liquid flowing into the exhaust liquid storage unit 3 from the overflow port 210, it means that the air in the temporary replacement dispensing unit 200 has been preliminarily exhausted. In actual use, you can judge whether the air has been exhausted by observing the liquid viewing structure 220 of the temporary replacement dispensing unit 200. When the liquid fills the temporary replacement dispensing unit 200 and is discharged from the overflow port 210, and the number of bubbles in the temporary replacement dispensing unit 200 decreases and finally disappears completely, it means that the air in the temporary replacement dispensing unit 200 has been completely exhausted.

[0050] (4) Quickly disconnect the quick connector (not shown in the figure) at one end of the hose 15 connected to the second liquid supply connector 130 from the second liquid supply connector 130 and plug it into the second connector 250 of the temporary replacement distribution unit 200; since the quick connector will automatically connect after connection, the liquid will flow from the temporary replacement distribution unit 200 into the pipeline and enter the liquid cooling server.

[0051] (5) Repeat step (4) to replace the quick connectors of all other hoses 15 connected to the cabinet liquid supply distribution unit 13 to be replaced one by one to the second connector 250 of the temporary replacement distribution unit 200.

[0052] (6) Disconnect the pipe connecting the cabinet liquid supply distribution unit 13 to be replaced and the liquid cooling liquid supply main pipe 16. At this time, the liquid cooling system distribution unit online replacement and maintenance device will take over the original liquid supply work of the replaced cabinet liquid supply distribution unit 13.

[0053] (7) Clean and maintain the replaced cabinet liquid supply distribution unit 13.

[0054] It should be noted that during the entire use process, it is necessary to observe the liquid level in the exhaust liquid storage unit 3. When the liquid level is too low, the valve of the liquid supply reserved interface 161 is opened. At this time, the liquid supply main pipe 16 provides a partial liquid supply function for the temporary replacement distribution unit 200, and replenishes liquid to the exhaust liquid storage unit 3 through the overflow port 210 of the temporary replacement distribution unit 200. When the liquid level in the exhaust liquid storage unit 3 is replenished sufficiently, the valve of the liquid supply reserved interface 161 is closed.

[0055] The method of using the online replacement and maintenance device of the liquid cooling system distribution unit of the present application to replace the cabinet liquid return distribution unit 14 is as follows:

[0056] (1) Connect the first joint 240 of the temporary replacement distribution unit 200 to the liquid return reserved interface 171 of the liquid cooling liquid return main pipe 17 through a hose.

[0057] (2) Keep the switch, control valve 5 and flow regulating valve 6 on the overflow port 210 in a closed state and open the valve on the liquid return reserved interface 171 of the liquid cooling liquid return main pipe 17 to connect the temporary replacement distribution unit 200 with the liquid cooling liquid return main pipe 17.

[0058] (3) Quickly disconnect the quick connector (not shown) at one end of the hose 15 connected to the second liquid return connector 140 from the second liquid return connector 140 and plug it into the second connector 250 of the temporary replacement distribution unit 200. Since the male and female ends of the quick connector are automatically connected after being connected, the liquid will flow from the first liquid return connector 120 through the hose into the temporary replacement distribution unit 200 and be discharged into the liquid cooling liquid return main pipe 17.

[0059] (4) Repeat step (3) to replace the quick connectors of all other hoses 15 connected to the cabinet liquid return distribution unit 14 to be replaced to the second connector 250 of the temporary replacement distribution unit 200 one by one.

[0060] (5) Disconnect the pipe connecting the cabinet liquid return distribution unit 14 to be replaced and the liquid cooling liquid return main pipe 17.

[0061] (6) Clean and maintain the replaced cabinet liquid return distribution unit 14.

[0062] Obviously, the above embodiments of the utility model are only examples for clearly explaining the technical solution of the utility model, and are not intended to limit the specific implementation methods of the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. An online replacement and maintenance device for a liquid cooling system distribution unit, comprising a temporary replacement distribution unit, wherein the temporary replacement distribution unit is provided with a first connector and a plurality of second connectors, characterized in that: A temporary liquid supply port is provided at one end of the temporary replacement distribution unit, and an overflow port is provided at the other end of the temporary replacement distribution unit; the device further comprises an exhaust liquid storage unit, a liquid delivery unit and a control valve, and the overflow port, the exhaust liquid storage unit, the liquid delivery unit and the temporary liquid supply port are sequentially connected through a pipeline; The control valve is arranged in the pipeline between the liquid delivery unit and the temporary liquid supply port.

2. The on-line replacement and maintenance device for a liquid cooling system distribution unit according to claim 1, characterized in that: The temporary replacement dispensing unit further comprises a viewing liquid structure, which is transparent or translucent.

3. A liquid cooling system distribution unit online replacement and maintenance device according to claim 1 or 2, characterized in that: The exhaust liquid storage unit includes a liquid storage tank, which is provided with a third joint and a liquid outlet. The third joint of the liquid storage tank is connected to the overflow port through a pipeline, and the liquid outlet of the liquid storage tank is connected to the liquid delivery unit through a pipeline.

4. The on-line replacement and maintenance device for a liquid cooling system distribution unit according to claim 3, characterized in that: The exhaust liquid storage unit further comprises a liquid sight tube, which is arranged at one side of the liquid storage tank and communicated with the liquid storage tank. The liquid storage tank is provided with a liquid discharge port, and the liquid discharge port is provided with a liquid discharge valve.

5. The on-line replacement and maintenance device for a liquid cooling system distribution unit according to claim 3, characterized in that: The liquid delivery unit comprises a liquid infusion pump, an input end of the liquid infusion pump is connected to the liquid outlet, and an output end of the liquid infusion pump is connected to the temporary liquid supply port.

6. A liquid cooling system distribution unit online replacement and maintenance device according to claim 1 or 2, characterized in that: The control valve is a one-way valve, the inlet of the one-way valve is connected to the output end of the liquid delivery unit, and the outlet of the one-way valve is connected to the temporary liquid supply port.

7. A liquid cooling system distribution unit online replacement and maintenance device according to claim 1 or 2, characterized in that: It also includes a flow regulating valve, which is arranged in the pipeline between the temporary liquid supply port and the control valve.

8. The on-line replacement and maintenance device for a liquid cooling system distribution unit according to claim 7, characterized in that: The flow regulating valve is a butterfly valve.

9. The on-line replacement and maintenance device for a liquid cooling system distribution unit according to claim 1 or 2, characterized in that: The second connector is a quick connector.

10. The on-line replacement and maintenance device for a liquid cooling system distribution unit according to claim 1 or 2, characterized in that: The temporary replacement distribution unit is a vertical tube structure or a ring tube structure.

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