Server liquid cooling system

Abstract

The utility model relates to a server liquid cooling system which comprises a primary side cooling loop, heat exchange equipment and a secondary side cooling loop, the primary side cooling loop is connected with outdoor cooling equipment, the secondary side cooling loop is connected with a server to be cooled, and the heat exchange equipment is connected with the primary side cooling loop and the secondary side cooling loop. Wherein the secondary side cooling loop comprises a liquid supply branch, a liquid return branch, a liquid supplementing tank, a circulating pump and an exhaust device. According to the system, the exhaust device is arranged on the liquid return branch, and the inner diameter of the exhaust device is larger than the pipe diameter of the liquid return branch, so that the flow velocity of liquid is slow when the liquid passes through the exhaust device, gas in the liquid heated by the server to be tested can be concentrated in the exhaust device, and gas-liquid separation is realized; the redundant gas in the liquid can be discharged, so that the cooling effect of the server liquid cooling system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of server cooling, in particular to a server liquid cooling system. BACKGROUND

[0002] With the continuous popularity of Internet technology, a large amount of data storage and calculation need to rely on servers to complete. The server will generate a large amount of heat during operation, and the temperature will directly affect the operation performance of the server.

[0003] At present, with the continuous emergence of high-power density large data centers, the traditional server liquid cooling system has the problem of poor cooling effect. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a server liquid cooling system capable of improving the cooling effect in view of the above technical problems.

[0005] In a first aspect, the present application provides a server liquid cooling system, which comprises a primary side cooling circuit, a heat exchange device and a secondary side cooling circuit, the primary side cooling circuit is connected with an outdoor cooling device, the secondary side cooling circuit is connected with a server to be cooled, and the heat exchange device is connected with the primary side cooling circuit and the secondary side cooling circuit respectively.

[0006] The secondary side cooling circuit comprises a liquid supply branch, a liquid return branch, a liquid supplement tank, a circulating pump and an exhaust device. The first end of the liquid supply branch is connected with the secondary side output port of the heat exchange device, the second end of the liquid supply branch is connected with the liquid inlet of the server to be cooled, the liquid outlet of the server to be cooled is connected with the first end of the liquid return branch, the second end of the liquid return branch is connected with the first end of the exhaust device, the second end of the exhaust device is connected with the first end of the circulating pump, and the second end of the circulating pump is connected with the secondary side input port of the heat exchange device. The exhaust device is also connected with the liquid supplement tank.

[0007] In one of the embodiments, the exhaust device is provided with an exhaust valve and a pressure sensor.

[0008] In one of the embodiments, the secondary side cooling circuit further comprises a shunt branch, one end of the shunt branch is connected with the liquid supply branch, and the other end of the shunt branch is connected with the exhaust device through a shunt valve.

[0009] In one of the embodiments, the secondary side cooling circuit further comprises a pressure relief valve and a liquid supplement pump, the exhaust port of the exhaust device is connected with the liquid supplement tank through the pressure relief valve, and the liquid supplement port of the exhaust device is connected with the liquid supplement tank through the liquid supplement pump. The liquid supplement tank is also connected with an external water tank.

[0010] In one of the embodiments, the secondary side cooling circuit further comprises a water quality detection branch, a water quality detection device is arranged on the water quality detection branch, and the water quality detection branch is connected with the liquid supply branch and the liquid return branch respectively.

[0011] In one of the embodiments, the secondary side cooling circuit further comprises an expansion tank, a switch valve and a liquid exchange valve, the expansion tank is connected with the first end of the exhaust device through the switch valve, and the expansion tank is connected with the liquid exchange valve, and the liquid exchange valve is connected with the external liquid pipeline.

[0012] In one of the embodiments, the secondary side cooling circuit further comprises a first filter device, and the first filter device is arranged on the liquid supply branch.

[0013] In one of the embodiments, the first filter device comprises a filter branch and a closed branch, the filter branch is provided with a liquid supply filter, a first switch and a second switch, the closed branch is provided with a third switch, and the closed branch and the filter branch are connected in parallel between the third end and the fourth end of the liquid supply branch.

[0014] The first filter device further comprises an inlet pressure monitor and an outlet pressure monitor, the inlet pressure monitor is arranged on the branch of the third end connected with the filter branch, and the outlet pressure monitor is arranged on the branch of the fourth end connected with the filter branch.

[0015] In one of the embodiments, the primary side cooling circuit comprises a liquid inlet branch, a liquid outlet branch and a second filter device, and the second filter device is arranged on the liquid inlet branch.

[0016] In one of the embodiments, the primary side cooling circuit and the secondary side cooling circuit further comprise at least one of a water pressure regulating valve, a flow sensor, a pressure sensor and a temperature sensor.

[0017] The server liquid cooling system is provided with the exhaust device on the liquid return branch, the inner diameter of the exhaust device is larger than the pipe diameter of the liquid return branch, so that the flow rate of the liquid passing through the exhaust device is slow, the gas in the liquid after the server is warmed up can be concentrated in the exhaust device, the gas-liquid separation is realized, the excess gas in the liquid can be discharged, and the cooling effect of the server liquid cooling system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 FIG. 1 is a structural schematic diagram of a server liquid cooling system in one of the embodiments;

[0020] Figure 2Structure diagram of server liquid cooling system in another embodiment;

[0021] Figure 3 Structure diagram of server liquid cooling system in another embodiment;

[0022] Figure 4 Structure diagram of server liquid cooling system in another embodiment;

[0023] Figure 5 Structure diagram of server liquid cooling system in another embodiment;

[0024] Figure 6 Structure diagram of server liquid cooling system in another embodiment;

[0025] Figure 7 Position diagram of strong current box and weak current box in one embodiment;

[0026] Figure 8 Structure diagram of server liquid cooling system in another embodiment.

[0027] Explanation of reference signs:

[0028] Primary side cooling circuit 01; heat exchange device 02; secondary side cooling circuit 03; outdoor cooling device 04; server to be cooled 05; liquid supply branch 31; liquid return branch 32; liquid supplement tank 321; circulating pump 322; exhaust device 323; exhaust valve 3231; pressure sensor 3232; shunt branch 33; shunt valve 331; exhaust valve 3231; pressure sensor 3232; pressure relief valve 324; liquid supplement pump 325; liquid level sensor 3211; electromagnetic valve 3213; liquid supplement filter 3212; water quality detection branch 34; water quality detection device 341; conductivity sensor 3411; pH meter 3412; metal hanging piece detection tank 3413; expansion tank 326; on-off valve 3261; liquid exchange valve 3262; first filter device 311; liquid supply filter 3111; first on-off valve 3112; second on-off valve 3113; third on-off valve 3114; inlet pressure monitor 3115; outlet pressure monitor 3116; liquid inlet branch 11, liquid outlet branch 12, second filter device 13. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0030] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, this does not indicate any order, quantity, or importance, but is merely used to distinguish different components. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. Words such as “comprising” or “including” mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] With the increasing prevalence of internet technology, massive amounts of data storage and computation rely on servers. Servers generate significant heat during operation, and temperature directly impacts their performance. Currently, with the emergence of large-scale data centers with high power density, the rapid flow of cooling liquid in the loop makes it difficult to completely expel gases, leading to ineffective cooling in server liquid cooling systems.

[0033] This application provides a server liquid cooling system designed to solve the aforementioned technical problems. The following embodiments will specifically illustrate the server liquid cooling system described in this application.

[0034] In one embodiment, such as Figure 1 As shown, a server liquid cooling system is provided, which includes: a primary cooling circuit 01, a heat exchange device 02, and a secondary cooling circuit 03.

[0035] The primary side cooling circuit 01 is connected with the outdoor cooling device 04, the secondary side cooling circuit 03 is connected with the server to be cooled 05 or the cabinet of the server to be cooled 05, and the heat exchange device 02 is connected with the primary side cooling circuit 01 and the secondary side cooling circuit 03 respectively. The secondary side cooling circuit 03 comprises a liquid supply branch 31, a liquid return branch 32, a liquid supplement tank 321, a circulating pump 322 and an exhaust device 323. The first end of the liquid supply branch 31 is connected with the secondary side output port of the heat exchange device 02, the second end of the liquid supply branch 31 is connected with the liquid inlet of the server to be cooled 05, the liquid outlet of the server to be cooled 05 is connected with the first end of the liquid return branch 32, the second end of the liquid return branch 32 is connected with the first end of the exhaust device 323, the second end of the exhaust device 323 is connected with the first end of the circulating pump 322, and the second end of the circulating pump 322 is connected with the secondary side input port of the heat exchange device 02. The exhaust device 323 is also connected with the liquid supplement tank 321.

[0036] The server to be cooled 05 can be multiple servers or multiple server cabinets in a ring network. The outdoor cooling device 04 can be an outdoor cooling tower. The liquid supply branch 31 is used to supply cold liquid to the server to be cooled 05. The liquid return branch 32 is used to return the liquid absorbing heat to the circulating pump 322, and the circulating pump 322 returns the liquid to the heat exchange device 02 for heat exchange to obtain cold liquid. The exhaust device 323 is provided with an exhaust valve 3231 and a pressure sensor 3232. The shape of the exhaust device 323 can be cylindrical, rectangular or other shapes. The material of the exhaust device 323 can be pipe material. The inner diameter of the exhaust device 323 is larger than the pipe diameter of the liquid return branch 32.

[0037] In the embodiment, the circulating process of the server liquid cooling system is as follows: for the primary side of the heat exchanger, the outdoor cooling device 04 supplies liquid to the primary side cooling circuit 01 through the liquid inlet of the primary side cooling circuit 01, absorbs heat and rises in temperature after passing through the heat exchanger, and then flows out from the liquid outlet of the primary side cooling circuit 01 to the outdoor cooling device 04 for heat exchange. The circulating power is provided by the pump set of the outdoor cooling unit. For the secondary side of the heat exchanger, the liquid flows into the cabinet of the server to be cooled 05 through the liquid supply port of the liquid supply branch 31, absorbs heat and rises in temperature after passing through the server to be cooled 05, enters the exhaust device 323 from the liquid return branch 32, and the liquid can be separated from the gas in the exhaust device 323 to remove the gas in the circulating pipeline. Then the liquid enters the circulating pump 322, enters the heat exchanger through the circulating pump 322, exchanges heat with the primary side cooling circuit 01, and obtains the cooled liquid from the liquid supply port of the secondary side cooling circuit to the cabinet of the server to be cooled 05, to complete the closed cycle.

[0038] The server liquid cooling system provided by the embodiment of the application is provided with an exhaust device 323 on the liquid return branch 32. Since the inner diameter of the exhaust device 323 is larger than the pipe diameter of the liquid return branch 32, the flow rate of the liquid passing through the exhaust device 323 is slow, the gas in the liquid after the server is warmed can be concentrated in the exhaust device 323, the gas-liquid separation is realized, the excess gas in the liquid can be discharged, and the cooling effect of the server liquid cooling system is improved.

[0039] In one embodiment, as shown in Figure 2 The secondary side cooling circuit 03 further comprises a shunt branch 33.

[0040] One end of the shunt branch 33 is connected with the liquid supply branch 31, and the other end of the shunt branch 33 is connected with the exhaust device 323 through a shunt valve 331. The shunt valve 331 functions as a bypass and can adjust the flow rate of the secondary side liquid supply branch 31.

[0041] Optionally, the secondary side cooling circuit 03 further comprises a pressure relief valve 324 and a liquid supplement pump 325.

[0042] The exhaust port of the exhaust device 323 is connected with the liquid supplement tank 321 through the pressure relief valve 324, and the liquid supplement port of the exhaust device 323 is connected with the liquid supplement tank 321 through the liquid supplement pump 325. The liquid supplement tank 321 is further connected with an external water tank or an external constant pressure pipeline. A liquid level sensor 3211 is arranged in the liquid supplement tank 321, and an electromagnetic valve 3213 and a liquid supplement filter 3212 are arranged on the inlet pipeline.

[0043] In the embodiment of the application, when the liquid level sensor 3211 detects that the liquid level of the liquid supplement tank 321 is lower than a set value, the electromagnetic valve 3213 is opened, the liquid enters the liquid supplement tank 321 through the liquid supplement filter 3212, and when the liquid level of the liquid supplement tank 321 is higher than the set value, the electromagnetic valve 3213 is closed, and the liquid supplement process is stopped. The liquid supplement pump 325 is arranged between the liquid supplement tank 321 and the exhaust device 323. When the pressure in the exhaust device 323 is lower than a set value, the liquid supplement pump 325 is started to supplement the liquid in the server liquid cooling system until the pressure in the exhaust device 323 reaches a target value. The pressure relief valve 324 functions as a pressure relief valve and can be automatically or manually operated. When the pressure of the server liquid cooling system reaches a set value or manual pressure relief, the pressure relief valve 324 is opened to discharge the liquid into the liquid supplement tank 321.

[0044] When it is necessary to replace the liquid in the secondary side cooling circuit 03, the electromagnetic valve 3213 can be opened to discharge the liquid. With the decrease of the pressure in the pipeline, the liquid supplement pump 325 is started, the liquid level of the liquid supplement tank 321 is continuously lowered with the operation of the liquid supplement pump 325, until the electromagnetic valve 3213 is opened, and the external liquid enters the liquid supplement tank 321. The liquid replacement is completed without affecting the business.

[0045] In one embodiment, as shown in Figure 3 The secondary side cooling circuit 03 further comprises a water quality detection device 34.

[0046] The water quality detection device 34 is connected to the liquid supply branch 31 and the liquid return branch 32. The water quality detection device 34 comprises an electric conductivity sensor 3411, a pH meter 3412, and a metal coupon detection tank 3413, which can detect the water quality of the server liquid cooling system in real time.

[0047] In one embodiment, as shown in Figure 4 The secondary side cooling circuit 03 further comprises an expansion tank 326, a switch valve 3261, and a liquid exchange valve 3262.

[0048] The expansion tank 326 is connected to the first end of the exhaust device 323 through the switch valve 3261, and is connected to the liquid exchange valve 3262, which is connected to an external liquid pipeline.

[0049] In the embodiment, the expansion tank 326 is pre-filled with a certain pressure gas. When the cooling liquid expands due to heating, the expansion tank 326 can absorb the expansion volume of the cooling liquid to maintain the balance of the circulating pipeline operating pressure. When the cooling liquid shrinks due to cooling, the compressed gas in the expansion tank 326 expands and releases part of the cooling liquid into the circulating pipeline, ensuring the stability of the circulating system pressure.

[0050] When the server cooling system is running stably for a long time, the liquid in the expansion tank 326 does not flow and is prone to deterioration. The liquid can be discharged periodically without stopping the equipment. The specific operation is as follows: first, close the switch valve 3261, then open the liquid exchange valve 3262, under the action of internal pressure, the liquid in the expansion tank 326 is discharged, after the liquid is discharged, close the liquid exchange valve 3262, then open the switch valve 3261, part of the liquid in the cooling system enters the expansion tank 326, and the whole replacement process is completed.

[0051] In one embodiment, as shown in Figure 5 The secondary side cooling circuit 03 further comprises a first filter device 311, which is arranged on the liquid supply branch 31.

[0052] The first filter device 311 comprises a filter branch and a closed branch. The filter branch comprises a liquid supply filter 3111, a first switch 3112, and a second switch 3113. The closed branch comprises a third switch 3114. The closed branch and the filter branch are connected in parallel between the third end and the fourth end of the liquid supply branch 31. The third end and the first end are in one route, and the fourth end and the second end are in another route.

[0053] The first filtering device 311 further comprises an inlet pressure monitor 3115 and an outlet pressure monitor 3116. The inlet pressure monitor 3115 is arranged on the branch of the third end connected with the filtering branch, and the outlet pressure monitor 3116 is arranged on the branch of the fourth end connected with the filtering branch.

[0054] In the embodiment, the inlet pressure monitor 3115 and the outlet pressure monitor 3116 can be used to determine whether the liquid supply filter 3111 is blocked. When the pressure difference between the two ends of the liquid supply filter 3111 is too large, the controller connected therewith can issue an alarm. The liquid supply filter 3111 is provided with an observation window and supports online replacement. Specifically, the third switch 3114 is opened, and the first switch 3112 and the second switch 3113 are closed, so that the filter core can be disassembled and assembled without affecting the operation of the server liquid cooling system. The first filtering device 311 is arranged on the secondary side liquid supply branch 31, and can protect the server cold plate.

[0055] In one embodiment, as shown in Figure 6 The primary side cooling circuit 01 comprises a liquid inlet branch 11, a liquid outlet branch 12, and a second filtering device 13. The second filtering device 13 is arranged on the liquid inlet branch 11.

[0056] The second filtering device 13 comprises a liquid inlet filter, a fourth switch, a fifth switch, an inlet pressure monitor 3115, and an outlet pressure monitor 3116. The second filtering device 13 has the same principle and function as the first filtering device 311.

[0057] In one embodiment, the primary side cooling circuit 01 and the secondary side cooling circuit 03 further comprise at least one of a water pressure regulating valve, a flow sensor, a pressure sensor 3232, and a temperature sensor.

[0058] The server liquid cooling system in the above embodiments can be integrated in a cabinet. The weak current equipment in the server liquid cooling system is connected with a weak current box, the strong current equipment in the server liquid cooling system is connected with a strong current box, and the controller is connected with the weak current box and the strong current box, respectively. The weak current box and the strong current box are independently configured. The weak current box is hung on the inner side of the front door, and the strong current box is placed in the upper space of the cold energy distribution unit of the server liquid cooling system, so as to avoid mutual interference and facilitate operation and maintenance. The specific arrangement mode can be referred to in Figure 7

[0059] The server liquid cooling system described in all the above Figures 1-6 embodiments, the application further provides a server liquid cooling system, as shown in Figure 8 ​As shown, the server liquid cooling system comprises a primary cooling circuit 01, a heat exchange device 02 and a secondary cooling circuit 03, the primary cooling circuit 01 is connected with an outdoor cooling device 04, the secondary cooling circuit 02 is connected with a server to be cooled 05, and the heat exchange device 02 is connected with the primary cooling circuit 01 and the secondary cooling circuit 03 respectively.

[0060] The primary cooling circuit 01 comprises an inlet branch 11 and an outlet branch 12. The inlet branch is sequentially provided with an electric regulating valve, a pressure sensor and a temperature sensor from right to left; the outlet branch 12 is sequentially provided with a second filter device 13, a temperature sensor, a flow meter and an automatic exhaust valve from left to right; the second filter device 13 sequentially comprises a pressure sensor, a fourth switch, an inlet filter, a fifth switch, a pressure sensor and a sixth switch in parallel with the branch formed by the fourth switch, the inlet filter and the fifth switch from left to right.

[0061] The secondary cooling circuit 03 comprises a liquid supply branch 31 and a liquid return branch 32. The liquid supply branch 31 is sequentially provided with an automatic exhaust valve, a safety valve, a flow meter, a first filter device 311 and a temperature sensor from left to right; the first filter device 311 sequentially comprises an inlet pressure monitor 3115, a first switch 3112, a liquid supply filter 3111, a second switch 3113, an outlet pressure monitor 3116 and a third switch 3114 in parallel with the branch formed by the first switch 3112, the liquid supply filter 3111 and the second switch 3113 from left to right. A plurality of parallel liquid supply sub-branches are arranged at the liquid supply port of the liquid supply branch 31.

[0062] The liquid return branch 32 is sequentially provided with an exhaust device 323 and a circulating pump 322 from right to left. The exhaust device 323 is provided with an exhaust valve 3231 and a pressure sensor 3232. A shunt branch 33 is arranged between the liquid supply branch 31 and the exhaust device 323, and the shunt branch 33 is provided with a shunt valve 331. A water quality detection device 341 is arranged between the liquid supply branch 31 and the liquid return branch 32, and the water quality detection device 341 sequentially comprises an electric conductivity sensor 3411, a pH meter 3412 and a metal hanging piece detection tank 3413 from top to bottom. The liquid return branch 32 is provided with a liquid supplement tank 321, the liquid supplement tank 321 is connected with the exhaust device 323 through a pressure relief valve 324 and a liquid supplement pump 325 respectively, a liquid level sensor 3211 is placed in the liquid supplement tank 321, and an electromagnetic valve 3213 and a liquid supplement filter 3212 are arranged on the inlet pipeline. The liquid return branch 32 is provided with an expansion tank 326, the expansion tank 326 is connected with the liquid return branch 32 through a switch valve 3261, and the expansion tank 326 is connected with an external liquid pipeline through a liquid exchange valve 3262. A plurality of parallel liquid return sub-branches are arranged at the liquid return port of the liquid return branch 32, and each liquid return sub-branch sequentially comprises a pressure sensor, a flow meter, a temperature sensor and an electric regulating valve from right to left.

[0063] In the embodiments of the present application, the primary side cooling circuit 01, the secondary side cooling circuit 03, the heat exchange device 02, the circulating pump 322, the exhaust device 323, the liquid supplement tank 321, and the strong / weak electricity tank and the like can be integrated in a cabinet, and the cabinet is provided with a liquid leakage sensor and a temperature and humidity sensor. The cabinet can be arranged side by side with the server 05 cabinet to be cooled, or can be arranged separately in a device room.

[0064] The primary side liquid enters the pipeline from the primary side cooling circuit 01 inlet, absorbs heat and rises in temperature after passing through the heat exchange device 02, and then flows out from the primary side cooling circuit 01 outlet to the outdoor cooling device 04 to exchange heat with the environment, and the circulating power is provided by the pump set of the outdoor cooling device 04.

[0065] The secondary side liquid enters the pipeline from the secondary side liquid return port under the action of the circulating pump 322, exchanges heat with the primary side liquid by passing through the heat exchange device 02, and the cooled liquid goes to the server 05 cabinet to be cooled from the secondary side cooling circuit 03 liquid supply port to complete the closed cycle.

[0066] The primary side cooling circuit 01 is provided with a pressure sensor, a temperature sensor and a flow meter for detecting liquid flow characteristic parameters; an electric regulating valve is arranged on the liquid outlet branch to regulate the flow of the primary side liquid, so as to ensure the constant temperature of the secondary side liquid supply; two pressure sensors in the first filter device can judge whether the liquid inlet filter is dirty and blocked; an automatic exhaust valve is arranged on the liquid inlet branch of the primary side cooling circuit 01 close to the high position of the heat exchange device 02.

[0067] The secondary side cooling circuit 03 is provided with a pressure sensor, a temperature sensor and a flow meter for detecting liquid flow characteristic parameters; the exhaust device 323 has a rapid gas-liquid separation function, which can remove the gas in the circulating pipeline, and is beneficial to the reliable operation of the circulating pump 322; the liquid supplement filter 3212 is arranged on the secondary side liquid supply branch, which plays a role in protecting the server cold plate, has an observation window, and the online replacement and dirty blockage alarm method is the same as that of the primary side liquid inlet filter; an exhaust valve 3231 is arranged on the high position of the secondary side liquid return branch and the exhaust device 323, and an automatic exhaust valve is arranged on the liquid supply branch close to the heat dissipation device 20; when the liquid supply pressure exceeds the limited value, the safety valve close to the automatic exhaust valve will be opened and the liquid will be discharged to the liquid supplement tank 321; a shunt valve 331 is arranged between the secondary side liquid supply branch and the liquid return branch, which plays a bypass role and can adjust the flow of the secondary side liquid supply. The secondary side is provided with an online water quality detection device 341, which is respectively a conductivity sensor 3411, a pH meter 3412 and a metal hanging piece detection tank 3413, which can detect the water quality of the liquid cooling system in real time.

[0068] The liquid supply branch and the liquid return branch of the secondary cooling circuit 03 are divided into two branches, which can be connected to two or two rows or two ring networks of server cabinets. Temperature sensors, pressure sensors and flow meters are arranged on the liquid return pipeline to detect the temperature, pressure and flow of the liquid in the pipeline. The electric regulating valve automatically adjusts according to the set flow or pressure difference to ensure that the liquid supplied to each branch is distributed as needed, thereby ensuring the uniformity of the terminal server cabinet.

[0069] The secondary cooling circuit 03 is provided with an expansion tank 326, which is pre-charged with a certain pressure gas. When the cooling liquid expands due to heating, the expansion tank 326 can absorb the expansion volume of the cooling liquid to ensure that the operating pressure of the circulating pipeline is maintained balanced. When the cooling liquid shrinks due to cooling, the compressed gas in the expansion tank 326 expands to release part of the cooling liquid into the circulating pipeline, thereby ensuring the stability of the circulating system pressure.

[0070] The secondary cooling circuit 03 is provided with a liquid supplement tank 321, in which a liquid level sensor 3211 is arranged. An electromagnetic valve 3213 and a liquid supplement filter 3212 are arranged on the inlet pipeline. The branch where the liquid supplement tank 321 is located is connected to an external constant pressure pipeline. When the liquid level in the liquid supplement tank 321 is lower than the set value, the electromagnetic valve 3213 is opened, and the liquid enters the liquid supplement tank 321. When the liquid level in the liquid supplement tank 321 is higher than the set value, the electromagnetic valve 3213 is closed, and the liquid supplement process stops. A liquid supplement pump 325 is arranged between the liquid supplement tank 321 and the system pipeline. When the pressure in the exhaust device 323 is lower than the set value, the liquid supplement pump 325 is started to supplement liquid into the system until the pressure reaches the target value. The pressure relief valve 324 functions as a pressure relief device, which can be automatically or manually operated. When the system pressure reaches the set value or the pressure is manually released, the pressure relief valve 324 is opened to discharge the liquid into the liquid supplement tank 321.

[0071] The server liquid cooling system also has an online liquid replacement function. When it is necessary to replace the liquid in the secondary cooling circuit 03, the liquid replacement valve 3262 is opened to discharge the liquid. As the pressure in the pipeline decreases, the liquid supplement pump 325 is started, and the liquid level in the liquid supplement tank 321 continuously decreases with the operation of the liquid supplement pump 325 until the on-off valve 3261 is opened, and the external liquid enters the liquid supplement tank 321. The liquid replacement is completed without affecting the business. When the system is stably operated for a long time, the liquid in the expansion tank does not flow and is prone to deterioration. The on-off valve 3261 and the liquid replacement valve 3262 can be opened and closed regularly without stopping the equipment. The specific operation is as follows: first, close the on-off valve 3261, then open the liquid replacement valve 3262, and the liquid in the expansion tank is discharged under the action of the internal pressure; after the liquid is discharged, close the liquid replacement valve 3262, then open the on-off valve 3261, and part of the liquid in the system enters the expansion tank, thereby completing the entire replacement process.

[0072] The strong electric box and the weak electric box of the server liquid cooling system are independently configured, the weak electric box is hung on the inner side of the front door, and the strong electric box is placed in the upper space in the CDU, so that mutual interference is avoided, and operation and maintenance are more convenient.

[0073] In the server liquid cooling system, the strong electric box and the weak electric box are independently configured, mutual interference is avoided, and operation and maintenance are more convenient; the online detection device such as the pH meter 3412, the conductivity sensor and the metal hanging piece detection tank is provided, the condition of the liquid is mastered in real time; the online liquid replacement function is provided, the server business is not affected when the secondary side liquid is replaced, and the automation degree of the liquid supplementing and replacing process is improved; the primary side filter and the secondary side filter are provided with observation windows, visual operation and maintenance are supported, and online maintenance is supported; the secondary side supply / return liquid pipeline is divided into two sub-zones, liquid supply control is independently performed, the condition is suitable for different types of servers in the same liquid cooling system, and flow uniformity is effectively improved.

[0074] In the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0075] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present application.

[0076] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A server liquid cooling system, characterized by, The server liquid cooling system comprises a primary side cooling circuit, a heat exchange device and a secondary side cooling circuit, the primary side cooling circuit is connected with an outdoor cooling device, the secondary side cooling circuit is connected with a server to be cooled, and the heat exchange device is connected with the primary side cooling circuit and the secondary side cooling circuit respectively; The secondary side cooling circuit comprises a liquid supply branch, a liquid return branch, a liquid supplement tank, a circulating pump and an exhaust device; a first end of the liquid supply branch is connected with a secondary side output port of the heat exchange device, a second end of the liquid supply branch is connected with a liquid inlet of the server to be cooled, a liquid outlet of the server to be cooled is connected with a first end of the liquid return branch, a second end of the liquid return branch is connected with a first end of the exhaust device, a second end of the exhaust device is connected with a first end of the circulating pump, and a second end of the circulating pump is connected with a secondary side input port of the heat exchange device; the exhaust device is further connected with the liquid supplement tank.

2. The server liquid cooling system of claim 1, wherein, An exhaust valve and a pressure sensor are arranged on the exhaust device.

3. The server liquid cooling system of claim 2, wherein, The secondary side cooling circuit further comprises a shunt branch, one end of the shunt branch is connected with the liquid supply branch, and the other end of the shunt branch is connected with the exhaust device through a shunt valve.

4. The server liquid cooling system of claim 1, wherein, The secondary side cooling circuit further comprises a pressure relief valve and a liquid supplement pump, an exhaust port of the exhaust device is connected with the liquid supplement tank through the pressure relief valve, and a liquid supplement port of the exhaust device is connected with the liquid supplement tank through the liquid supplement pump; the liquid supplement tank is further connected with an external water tank.

5. The server liquid cooling system of claim 1, wherein, The secondary side cooling circuit further comprises a water quality detection branch, a water quality detection device is arranged on the water quality detection branch, and the water quality detection branch is connected with the liquid supply branch and the liquid return branch respectively.

6. The server liquid cooling system of claim 1, wherein, The secondary side cooling circuit further comprises an expansion tank, an on-off valve and a liquid replacement valve, the expansion tank is connected with the first end of the exhaust device through the on-off valve, the expansion tank is further connected with the liquid replacement valve, and the liquid replacement valve is connected with an external liquid pipeline.

7. The server liquid cooling system of claim 1, wherein, The secondary side cooling circuit further comprises a first filter device, and the first filter device is arranged on the liquid supply branch.

8. The server liquid cooling system of claim 7, wherein, The first filter device comprises a filter branch and a closed branch, a liquid supply filter, a first switch and a second switch are arranged on the filter branch, a third switch is arranged on the closed branch, and the closed branch and the filter branch are connected in parallel between a third end and a fourth end of the liquid supply branch. The first filter device further comprises an inlet pressure monitor and an outlet pressure monitor, the inlet pressure monitor is arranged on a branch of the third end connected with the filter branch, and the outlet pressure monitor is arranged on a branch of the fourth end connected with the filter branch.

9. The liquid cooling system for servers according to any of claims 1-8, characterized in that, The primary side cooling circuit comprises a liquid inlet branch, a liquid outlet branch and a second filter device, and the second filter device is arranged on the liquid inlet branch.

10. The server liquid cooling system of claim 1, wherein, The primary side cooling circuit and the secondary side cooling circuit further comprise at least one of a water pressure regulating valve, a flow sensor, a pressure sensor and a temperature sensor.

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