Immersed liquid cooling system and control method

Abstract

The invention relates to an immersed liquid cooling system and a control method. The immersion liquid cooling system comprises an immersion cabinet suitable for accommodating a plurality of servers, a cooling device used for cooling a cooling liquid, and a circulation pipeline connected between the cooling device and the immersion cabinet. And the circulating pipeline comprises a liquid supply pipeline for the cooling liquid to flow to the immersion cabinet and a liquid return pipeline for the cooling liquid to flow out of the immersion cabinet. The liquid supply pipeline comprises a liquid supply main path and a liquid supply auxiliary path. The liquid supply main path comprises a plurality of liquid distribution ports, and the liquid distribution ports are used for being communicated with a plurality of servers so as to provide cooling liquid to the interiors of the corresponding servers. The liquid supply main path is communicated with the immersion cabinet, the liquid supply auxiliary path is communicated with the immersion cabinet to provide cooling liquid for a cavity of the immersion cabinet to immerse the server, and the liquid supply main path and the liquid supply auxiliary path are provided with adjusting valves to distribute the flow of the cooling liquid flowing to the liquid supply main path and the liquid supply auxiliary path. According to the immersed liquid cooling system and the control method provided by the invention, the heat dissipation performance can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation of data center servers, and in particular to an immersion liquid cooling system and a control method. Background Art

[0002] As the computing power of servers increases, the heat generated by servers at work also increases dramatically, which puts higher demands on the server's cooling system. Traditional air cooling technology has been unable to cope with the heat dissipation challenges of high loads, and liquid cooling has important application value in the field of server cooling due to its excellent heat dissipation efficiency. At present, immersion liquid cooling technology has become the preferred solution for scenarios with high heat dissipation requirements such as servers. This technology immerses all or part of the components of the server in a cabinet filled with insulating coolant. The insulating coolant in the cabinet is connected to an external heat exchange device or CDU (Coolant Distribution Unit) through a circulation pipeline. The insulating coolant is cooled by the external heat exchange device or CDU heat exchange and then transported to the cabinet.

[0003] However, the immersion liquid cooling systems currently on the market usually only inject the coolant into the cabinet as a whole, and it is impossible to know the amount of coolant flowing into the server, especially when multiple servers are densely arranged in the cabinet. Moreover, since the coolant has a certain viscosity, it is not easy for the coolant to flow into narrow spaces such as the inside of the server. Therefore, even if the coolant flow rate of the system is increased, it may not be able to increase the coolant flow rate flowing into the server. Therefore, increasing the coolant flow rate of the system as a whole has limited effect on the improvement of the server's heat dissipation effect. In this context, when the heat generation power of the server increases sharply, the operation mode of the existing immersion liquid cooling system will encounter bottlenecks.

[0004] In view of this, it is necessary to propose a new technical solution to overcome the shortcomings of the prior art. Summary of the invention

[0005] In order to solve the technical problems existing in the prior art, the present application provides an immersion liquid cooling system and a control method, which can improve the heat dissipation performance.

[0006] To this end, the present application adopts the following technical solution: an immersion liquid cooling system, comprising an immersion cabinet suitable for accommodating multiple servers, a cooling device for cooling the cooling liquid, and a circulation pipeline connected between the cooling device and the immersion cabinet, the circulation pipeline comprising a liquid supply pipeline for supplying the cooling liquid to flow to the immersion cabinet and a liquid return pipeline for supplying the cooling liquid to flow out of the immersion cabinet, the liquid supply pipeline comprising a main liquid supply pipeline and an auxiliary liquid supply pipeline, the main liquid supply pipeline comprising a plurality of liquid distribution ports, the plurality of liquid distribution ports being respectively connected to the multiple servers to provide the cooling liquid to the corresponding servers, the auxiliary liquid supply pipeline being connected to the immersion cabinet to provide the cooling liquid to the cavity of the immersion cabinet to immerse the servers, wherein the main liquid supply pipeline and the auxiliary liquid supply pipeline are provided with regulating valves to distribute the cooling liquid flow to the main liquid supply pipeline and the auxiliary liquid supply pipeline.

[0007] As a further improved technical solution, the immersion cabinet includes a plurality of connection channels assembled corresponding to the plurality of servers, and the liquid separation port is connected to the connection channels.

[0008] As a further improved technical solution, the connecting channel includes a supporting step, a flexible gasket is provided on the supporting step, and the server is supported on the supporting step.

[0009] As a further improved technical solution, the connecting channel is arranged below the server, and a liquid outlet is arranged above the server.

[0010] As a further improved technical solution, the immersion cabinet comprises an overflow trough, an overflow inlet connected to the cavity of the immersion cabinet is provided above the overflow trough, and the overflow trough is connected to the liquid return pipeline.

[0011] As a further improved technical solution, the overflow inlet is flush with or slightly lower than the liquid outlet of the server.

[0012] As a further improved technical solution, the immersion liquid cooling system includes a filtering device, the circulation pipeline includes a filtering branch for the coolant to flow through the filtering device and a bypass branch for the coolant not to flow through the filtering device, and controllable valves are provided on the filtering branch and the bypass branch.

[0013] As a further improved technical solution, the liquid supply pipeline includes the filter branch and the bypass branch, and the filter branch and the bypass branch are arranged upstream of the main liquid supply path and the auxiliary liquid supply path.

[0014] The present application also adopts the following technical solution: a control method for an immersion liquid cooling system, the control method is used to control the operation of the immersion liquid cooling system, wherein the immersion liquid cooling system includes a filtering device, the circulation pipeline includes a filtering branch for the coolant to flow through the filtering device and a bypass branch for the coolant not to flow through the filtering device, the control method includes:

[0015] Determine whether the current ambient temperature exceeds the preset temperature threshold;

[0016] If so, the cooling liquid is controlled to flow to the submerged cabinet through the bypass branch.

[0017] As a further improved technical solution, the control method includes:

[0018] Determine whether the current time is within the preset time period;

[0019] If the current ambient temperature does not exceed the preset temperature threshold and when the ambient temperature is within a preset time period, the coolant is controlled to flow to the immersion cabinet through the filter branch.

[0020] Compared with the prior art, the liquid supply pipeline of the immersion liquid cooling system provided in the present application includes a main liquid supply line and an auxiliary liquid supply line, wherein the main liquid supply line includes a plurality of liquid distribution ports, and the plurality of liquid distribution ports are used to be connected to a plurality of servers respectively to provide cooling liquid to the corresponding servers, and the auxiliary liquid supply line is connected to the immersion cabinet to provide cooling liquid to the immersion cabinet to immerse the servers, wherein regulating valves are provided on the main liquid supply line and the auxiliary liquid supply line to distribute the cooling liquid flow to the main liquid supply line and the auxiliary liquid supply line. In this way, the setting of the main liquid supply line ensures that more cooling liquid can flow into the server, strengthens heat exchange, helps to reduce the temperature of high-heat generating components on the server, and improves working stability; the setting of the auxiliary liquid supply line allows the cooling liquid to directly enter the immersion cabinet, flow to the space between the servers and between the servers and the walls of the immersion cabinet, take away the heat on the surface of the server shell, and improve the overall heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a system connection diagram of an immersion liquid cooling system according to an embodiment of the present application.

[0023] Figure 2This is a partial schematic diagram of the connecting channel in an embodiment of the immersion liquid cooling system provided in the present application.

[0024] Figure 3 This is a flow chart of the immersion liquid cooling system control method provided in this application.

[0025] Explanation of the reference numerals: 10, immersion cabinet; 101, cavity; 102, overflow tank; 11, connecting channel; 111, flexible gasket; 20, cooling device; 30, circulation pipeline; 31, liquid return pipeline; 32, liquid supply pipeline; 321, filter branch; 322, bypass branch; 323, liquid supply main pipeline; 324, liquid supply auxiliary pipeline; 33, circulation pump; 34, filter device; 351, first controllable valve; 352, second controllable valve; 353, first regulating valve; 354, second regulating valve; 4, server. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art 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 this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0028] See also Figure 1 As shown, the present application provides an immersion liquid cooling system. The immersion liquid cooling system includes an immersion cabinet 10 suitable for accommodating multiple servers 4, a cooling device 20 for cooling the cooling liquid, and a circulation pipeline 30 connected between the cooling device 20 and the immersion cabinet 10. A circulation pump 33 is provided on the circulation pipeline 30 to drive the cooling liquid to circulate between the immersion cabinet 10 and the cooling device 20. The cooling liquid is cooled in the cooling device 20 and then transported to the immersion cabinet 10. The cooling liquid exchanges heat with the server 4 in the immersion cabinet 10, absorbs heat and the temperature rises, then flows to the cooling device 20, and is cooled by the cooling device 20 and then transported to the immersion cabinet 10 again. In this cycle, the cooling of the server 4 is achieved.

[0029] The circulation pipeline 30 includes a liquid supply pipeline 32 for supplying cooling liquid to the immersion cabinet 10 and a liquid return pipeline 31 for supplying cooling liquid out of the immersion cabinet 10. The liquid supply pipeline 32 includes a main liquid supply line 323 and an auxiliary liquid supply line 324. The main liquid supply line 323 includes a plurality of liquid distribution ports, which are respectively connected to the plurality of servers 4 to provide cooling liquid to the corresponding servers 4; the auxiliary liquid supply line 324 is connected to the immersion cabinet 10 to provide cooling liquid to the cavity 101 of the immersion cabinet 10 to immerse the servers 4. The main liquid supply line 323 and the auxiliary liquid supply line 324 are provided with regulating valves to distribute the cooling liquid flow to the main liquid supply line 323 and the auxiliary liquid supply line 324.

[0030] The immersion liquid cooling system provided in the present application has a main liquid supply path 323, which ensures that more cooling liquid can flow into the interior of the server 4, thereby enhancing heat exchange, which is beneficial to reducing the temperature of high-heat-generating components on the server 4 and improving working stability. The auxiliary liquid supply path 324 is configured so that the cooling liquid directly enters the cavity 101 of the immersion cabinet 10, flows to the space between the servers 4 and between the servers 4 and the walls of the immersion cabinet 10, and takes away the heat from the surface of the server 4 shell, thereby having a better heat dissipation effect.

[0031] See also Figure 1 As shown, the immersion cabinet 10 is a cabinet having a cavity 101, and the cavity 101 is used to accommodate the server 4 and to be filled with cooling liquid to immerse the server 4. The immersion cabinet 10 also includes an overflow tank 102, and an overflow inlet connected to the cavity 101 of the immersion cabinet 10 is provided above the overflow tank 102. When the liquid level of the cooling liquid in the cavity 101 is higher than the overflow inlet, the cooling liquid flows into the overflow tank 102. The overflow tank 102 is connected to the return liquid pipeline 31, and the cooling liquid entering the overflow tank 102 is driven by the circulation pump 33 to flow to the cooling device 20. Through the arrangement of the overflow tank 102, the cooling liquid with a higher temperature that absorbs the heat of the server 4 at the upper part of the cavity 101 of the immersion cabinet 10 flows to the cooling device 20 through the overflow tank 102, thereby improving the circulation cooling efficiency.

[0032] See also Figure 2As shown, the immersion cabinet 10 includes a plurality of connection channels 11 corresponding to the plurality of servers 4. The connection channel 11 is arranged in the cavity 101 of the immersion cabinet 10 and is arranged near the lower part of the cavity 101. In this embodiment, the connection channel 11 is a structural component for communicating with the interior of the server 4, and is also used to support and position the server 4 to facilitate the assembly of the server 4 in the immersion cabinet 10. In this embodiment, the connection channel 11 is a channel steel structure, which includes a support step, and a flexible gasket 111 is arranged on the support step. The connection channel 11 is arranged below the server 4, and the server 4 is supported on the support step. The flexible gasket 111 can play a role in buffering and vibration reduction, prevent the server 4 from being damaged by collision and vibration, and ensure good docking with the bottom of the server 4.

[0033] The plurality of liquid separation ports included in the main liquid supply path 323 are respectively connected to the connecting channel 11. In the present embodiment, the liquid separation port is connected to the connecting channel 11 as a whole. A liquid outlet is provided above the server 4, and the coolant provided by the main liquid supply path 323 enters the inside of the server 4 from the bottom of the server 4 through the liquid separation port, and is discharged from the liquid outlet above the server 4 after heat exchange with the heating element inside the server 4. The overflow inlet is flush with or slightly lower than the liquid outlet of the server 4, so that the high-temperature coolant discharged from the liquid outlet of the server 4 can enter the overflow tank 102 through the overflow inlet in time, and circulate to the cooling device 20 for cooling. The overflow inlet can be flush with the liquid outlet of the server 4 or lower than the liquid outlet. However, the overflow inlet should not be set too low, because if it is too low, the coolant at a relatively low liquid level in the cavity 101 of the immersion cabinet 10 will enter the overflow tank 102. Since the coolant at a relatively low liquid level in the cavity 101 has not yet been fully heat exchanged, its temperature is still low, and the coolant with a higher temperature in the upper part of the cavity 101 cannot be cooled down in time, affecting the circulation and cooling effect of the coolant. Therefore, the overflow inlet can be set slightly lower than the liquid outlet of the server 4. In this embodiment, the liquid outlet of the server 4 is set as a network port, which allows the coolant to circulate while preventing debris and human hands from entering the server 4, thereby ensuring the operation safety of the server 4 and personal safety.

[0034] See also Figure 1As shown, the circulation pipeline 30 includes a liquid supply pipeline 32 for supplying cooling liquid to the immersion cabinet 10 and a liquid return pipeline 31 for supplying cooling liquid out of the immersion cabinet 10. A circulation pump 33 is arranged on the liquid return pipeline 31. The liquid supply pipeline 32 includes a liquid supply main line 323 and a liquid supply auxiliary line 324, a first regulating valve 353 is arranged on the liquid supply main line 323, and a second regulating valve 354 is arranged on the liquid supply auxiliary line 324. The openings of the first regulating valve 353 and the second regulating valve 354 are adjustable separately to adjust the cooling liquid flow of the liquid supply main line 323 and the liquid supply auxiliary line 324, so that the heat inside and around the server 4 can be more targeted. In some other embodiments, the first regulating valve 353 and the second regulating valve 354 can be controlled in linkage; in some other embodiments, the first regulating valve 353 and the second regulating valve 354 can be replaced by a three-way valve.

[0035] The low-temperature coolant flowing out of the cooling device 20 enters the immersion cabinet 10 through the main liquid supply path 323 and the auxiliary liquid supply path 324. In this embodiment, a section of the main liquid supply path 323 located in the immersion cabinet 10 is integrated with the multiple connecting channels 11 and the immersion cabinet 10, and a section of the main liquid supply path 323 located in the immersion cabinet 10 has an external interface for connecting to the cooling device 20 through an external pipeline to form a complete liquid supply path. The multiple liquid distribution ports included in the main liquid supply path 323 are connected to the multiple connecting channels 11 in a one-to-one correspondence, and the multiple connecting channels 11 are assembled and connected to the inside of multiple servers 4 in a one-to-one correspondence. After the low-temperature coolant enters the corresponding server 4 through the connecting channel 11, it flows through the heating element inside the server 4, and the coolant obtains heat through convection and conduction heat exchange and the temperature rises to become a high-temperature coolant. The high-temperature coolant flows out through the liquid outlet above the server 4 and circulates to the cooling device 20. The low-temperature coolant directly enters the integral cavity 101 of the immersion cabinet 10 through the auxiliary liquid supply path 324, flows to the gaps between the multiple servers 4 and the gaps between the servers 4 and the walls of the immersion cabinet 10, and takes away the heat from the shell surface of the server 4. In addition, by adjusting the opening of the first regulating valve 353 and the second regulating valve 354, the flow of the coolant flowing through the main liquid supply path 323 and the auxiliary liquid supply path 324 can be adjusted to reasonably adjust the internal heat dissipation and surface heat dissipation performance of the server 4.

[0036] Please continue reading Figure 1As shown, the immersion liquid cooling system further includes a filter device 34, and the circulation pipeline 30 includes a filter branch 321 for the coolant to flow through the filter device 34 and a bypass branch 322 for the coolant not to flow through the filter device 34. The bypass branch 322 and the filter branch 321 are arranged in parallel. The filter branch 321 and the bypass branch 322 are provided with controllable valves, specifically, the controllable valves include a first controllable valve 351 provided on the filter branch 321 and a second controllable valve 352 provided on the bypass branch 322. In this embodiment, the filter branch 321 and the bypass branch 322 are provided on the liquid supply pipeline 32, that is, the liquid supply pipeline 32 includes the filter branch 321 and the bypass branch 322. Furthermore, in this embodiment, the filtering branch 321 and the bypass branch 322 are arranged upstream of the liquid supply main path 323 and the liquid supply auxiliary path 324 .

[0037] The coolant is insulating oil, which is mainly a carbon-based compound. After the liquid cooling system has been running for a long time, the coolant will also be carbonized at high temperature and turn yellow, and the number of fine impurities will increase. The setting of the filter device 34 can absorb the carbonized substances in the coolant and dry a small amount of water, keep the coolant clean, prevent impurities and water from having adverse effects on the electrical components on the server 4, and reduce the risk of circuit failure caused by impurities and water quality. In addition, by setting the filter device 34, the frequency of shutdown and cleaning of the immersion liquid cooling system can be reduced, thereby improving the operating efficiency.

[0038] Please also read Figure 1 and Figure 3 As shown, the filter device 34 has an obstructive effect on the flow of the coolant, that is, the setting of the filter device 34 will increase the flow resistance of the coolant flowing through the filter device 34, increase the pressure loss of the system, and thus increase the operating power of the circulation pump 33. Especially under conditions with high heat dissipation requirements, the increase in the flow resistance of the coolant increases the load of the entire immersion liquid cooling system, increases the energy consumption of the system, and may cause insufficient heat dissipation capacity. To this end, the present application sets a bypass branch 322 and controls whether the coolant flows through the filter device 34 according to the operating conditions of the immersion liquid cooling system, so as to solve the problem of large load under conditions with high heat dissipation requirements while achieving filtration.

[0039] In one embodiment of the present application, the following control method is specifically used to control the operation of the immersion liquid cooling system: determine whether the current ambient temperature exceeds the preset temperature threshold T0; if so, control the cooling liquid to flow to the immersion cabinet 10 through the bypass branch 322.

[0040] When the ambient temperature exceeds the preset temperature threshold T0, that is, the ambient temperature at this time is relatively high, and the server 4 is running and generating heat, the heat dissipation demand under this working condition is relatively large. At this time, controlling the coolant to flow through the bypass branch 322 instead of flowing through the filter device 34 can avoid the increase of flow resistance and pressure loss, accelerate the circulation of the coolant, reduce the load of the circulating pump 33, and enhance the heat dissipation performance. For example, in the hot summer, the heat that needs to be dissipated through the cooling device 20 is usually high, and the circulating pump 33 usually needs to run at full frequency. When the circulating pump 13 runs at full frequency, the pressure loss of the coolant passing through the filter device 34 will be relatively large, and the energy consumption will increase. Therefore, under this working condition, the first controllable valve 351 is disconnected and the second controllable valve 352 is turned on so that the coolant does not pass through the filter device 34. When the ambient temperature is low in autumn and winter, the operating frequency of the circulating pump 33 is reduced. In this case, the first controllable valve 351 is turned on and the second controllable valve 352 is turned off so that the coolant passes through the filter device 34, resulting in a small pressure loss, which is convenient for energy-saving operation of the system. The preset temperature threshold T0 can be reasonably set according to the temperature conditions of the area where the system is located. For example, in some embodiments, the preset temperature threshold T0 is set to 25°, 30°, etc.

[0041] Furthermore, based on the generation of impurities in the coolant and the consideration of energy conservation and emission reduction, the filtering can be performed intermittently. In other words, even under low heat dissipation demand conditions, it is not necessary to continuously filter the coolant. Therefore, the control method also includes: further determining whether the current time is in a preset time period; if the current ambient temperature does not exceed the preset temperature threshold and when the ambient temperature is within the preset time period, the coolant is controlled to flow to the immersion cabinet 10 through the filter branch 321. The preset time period is preferably a time period when the heat dissipation demand is not high and the power supply is sufficient, such as selecting a valley power time period, such as 5 am to 7 am. No filtering is performed in other time periods, or even within the above-mentioned preset time period but when the ambient temperature is high and the heat dissipation demand is large, no filtering is performed.

[0042] When the immersion liquid cooling system provided in the present application is in use, the circulation pump 33 is started to circulate the coolant between the immersion cabinet 10 and the cooling device 20. During the circulation process, the first controllable valve 351 and the second controllable valve 352 are controlled to be on and off, so that the coolant can flow through or not flow through the filter device 34. The coolant enters the inside and around the server 4 respectively through the main liquid supply path 323 and the auxiliary liquid supply path 324, thereby achieving uniform and good heat dissipation.

[0043] From the above description of the specific embodiments, it can be known that the liquid supply pipeline 32 of the immersion liquid cooling system provided in the present application includes a main liquid supply line 323 and an auxiliary liquid supply line 324, the main liquid supply line 323 includes a plurality of liquid distribution ports, and the plurality of liquid distribution ports are used to respectively connect with a plurality of servers 4 to provide cooling liquid to the corresponding servers 4, and the auxiliary liquid supply line 324 is connected to the immersion cabinet 10 to provide cooling liquid to the cavity 101 of the immersion cabinet to immerse the server 4, wherein regulating valves are provided on the main liquid supply line 323 and the auxiliary liquid supply line 324 to distribute the cooling liquid flow to the main liquid supply line 323 and the auxiliary liquid supply line 324. In this way, the setting of the main liquid supply path 323 ensures that more cooling liquid can flow into the interior of the server 4, thereby enhancing heat exchange, which is beneficial to reducing the temperature of high-heat-generating components on the server 4 and improving working stability; the setting of the auxiliary liquid supply path 324 allows the cooling liquid to directly enter the cavity 101 of the immersion cabinet 10, flow to the space between the servers 4 and between the servers 4 and the walls of the immersion cabinet 10, take away the heat from the surface of the server 4 shell, and enhance the heat dissipation performance.

[0044] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. An immersion liquid cooling system, comprising an immersion cabinet suitable for accommodating a plurality of servers, a cooling device for cooling a cooling liquid, and a circulation pipeline connected between the cooling device and the immersion cabinet, characterized in that: The circulation pipeline includes a liquid supply pipeline for supplying cooling liquid to the immersion cabinet and a liquid return pipeline for supplying cooling liquid out of the immersion cabinet. The liquid supply pipeline includes a main liquid supply pipeline and an auxiliary liquid supply pipeline. The main liquid supply pipeline includes a plurality of liquid distribution ports, and the plurality of liquid distribution ports are respectively connected to the plurality of servers to provide cooling liquid to the corresponding servers. The auxiliary liquid supply pipeline is connected to the immersion cabinet to provide cooling liquid to the cavity of the immersion cabinet to immerse the servers. The main liquid supply pipeline and the auxiliary liquid supply pipeline are provided with regulating valves to distribute the cooling liquid flow to the main liquid supply pipeline and the auxiliary liquid supply pipeline.

2. The immersion liquid cooling system according to claim 1, characterized in that: The immersion cabinet includes a plurality of connection channels assembled corresponding to the plurality of servers, and the liquid separation port is connected to the connection channels.

3. The immersion liquid cooling system according to claim 2, characterized in that: The connecting channel comprises a supporting step, a flexible gasket is arranged on the supporting step, and the server is supported on the supporting step.

4. The immersion liquid cooling system according to claim 2 or 3, characterized in that: The connecting channel is arranged below the server, and a liquid outlet is arranged above the server.

5. The immersion liquid cooling system according to claim 4, characterized in that: The immersion cabinet comprises an overflow trough, an overflow inlet connected to the cavity of the immersion cabinet is arranged above the overflow trough, and the overflow trough is connected to the liquid return pipeline.

6. The immersion liquid cooling system according to claim 5, characterized in that: The overflow inlet is flush with or slightly lower than the liquid outlet of the server.

7. The immersion liquid cooling system according to claim 1, characterized in that: The immersion liquid cooling system includes a filter device, the circulation pipeline includes a filter branch for cooling liquid to flow through the filter device and a bypass branch for cooling liquid not to flow through the filter device, and controllable valves are provided on the filter branch and the bypass branch.

8. The immersion liquid cooling system according to claim 7, characterized in that: The filter branch and the bypass branch are arranged in the liquid supply pipeline, and the filter branch and the bypass branch are arranged upstream of the main liquid supply pipeline and the auxiliary liquid supply pipeline.

9. A control method for an immersion liquid cooling system, characterized in that: The control method is used to control the operation of the immersion liquid cooling system according to claim 1, wherein the immersion liquid cooling system includes a filter device, the circulation pipeline includes a filter branch for the coolant to flow through the filter device and a bypass branch for the coolant not to flow through the filter device, and the control method includes: Determine whether the current ambient temperature exceeds the preset temperature threshold; If so, the cooling liquid is controlled to flow to the submerged cabinet through the bypass branch.

10. The control method of the immersion liquid cooling system according to claim 9, characterized in that: The control method comprises: Determine whether the current time is within the preset time period; If the current ambient temperature does not exceed the preset temperature threshold and when the ambient temperature is within a preset time period, the coolant is controlled to flow to the immersion cabinet through the filter branch.

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