Secondary side circulation pipe network and data center liquid cooling system

Abstract

The application relates to the technical field of data centers, and discloses a secondary side circulating pipe network and a data center liquid cooling system. The secondary side circulating pipe network comprises a circulating pipe structure, a water quality monitoring system, a water quality purification system and a control system. The circulating pipe structure is suitable for forming a circulating loop between a cold distribution unit and a liquid cooling cabinet. The water quality monitoring system is arranged on the circulating pipe structure. The water quality purification system is arranged in parallel with the circulating pipe structure and is used for diluting and purifying water in the circulating pipe structure. The control system is connected with the water quality monitoring system and the water quality purification system, is used for receiving water quality data transmitted by the water quality monitoring system, and controls the on-off between the water quality purification system and the circulating pipe structure according to the water quality data. The application realizes real-time monitoring and data feedback of the water quality of the secondary side circulating pipe network, and realizes the ability of re-purifying and utilizing the deteriorated water quality without stopping the machine and restoring the good water quality.

Description

Technical Field

[0001] This invention relates to the field of data center technology, specifically to a secondary side circulation network and a data center liquid cooling system. Background Technology

[0002] Currently, plate-cooled liquid-cooled servers are more popular than immersion servers due to their economical R&D costs and ease of maintenance, making them the preferred choice for data center cooling structures. Because servers are expensive to manufacture and have small cold plate flow channels, and to reduce overall construction costs and facilitate water quality management, liquid-cooled data centers employ a dual-circulation water system with primary and secondary piping networks. The primary piping network, from the cooling distribution unit to the cooling tower or other external cooling equipment, is primarily responsible for transferring heat from the secondary piping network to the external environment, achieving heat dissipation for the entire liquid-cooling system. The secondary piping network is mainly responsible for transporting cooling water from the cooling distribution unit to the liquid-cooled plates or cold plates inside the server to dissipate heat from high-heat-density components within the server.

[0003] However, pollutants often appear during the manufacturing or welding process of the secondary side pipeline circulation system, causing the water quality to deteriorate and change color after circulating for a period of time, reducing heat dissipation capacity, and in severe cases, even causing the server to overheat and crash. Summary of the Invention

[0004] In view of this, the present invention provides a secondary side circulation pipe network and a data center liquid cooling system to solve the problem that the water quality deteriorates and changes color after the water in the circulation pipe has been circulating for a period of time, thus reducing the heat dissipation capacity.

[0005] In a first aspect, the present invention provides a secondary-side circulation network, including a circulation pipeline structure, a water quality monitoring system, a water quality purification system, and a control system; the circulation pipeline structure is adapted to form a circulation loop between a cooling capacity distribution unit and a liquid cooling cabinet; the water quality monitoring system is installed on the circulation pipeline structure; the water quality purification system is connected in parallel with the circulation pipeline structure for diluting and purifying the water within the circulation pipeline structure; the control system is connected to both the water quality monitoring system and the water quality purification system for receiving water quality data transmitted by the water quality monitoring system and controlling the on / off connection between the water quality purification system and the circulation pipeline structure based on the water quality data.

[0006] Beneficial effects: The water quality monitoring system enables real-time monitoring of the water quality within the circulation pipeline structure. Connected to the control system, the system transmits monitored water quality data in real time. Because the water purification system is connected in parallel with the circulation pipeline structure and is also connected to the control system, when the water quality monitoring system detects that the water quality meets the standards, the connection between the purification system and the circulation pipeline structure is disconnected, allowing the cooling water to flow normally within the circulation pipeline structure without any additional processing burden, avoiding unnecessary energy consumption and resource waste during the purification process. When the water quality monitoring system detects that the water quality does not meet the standards, the connection between the purification system and the circulation pipeline structure is reconnected, allowing the purification system to dilute and purify the water within the circulation pipeline structure. This ensures real-time monitoring and immediate feedback of the water quality of the secondary side pure water cooling medium. Furthermore, without interrupting the cooling system operation or interfering with the system's water temperature stability and pressure balance, it enables immediate intervention and restoration of deteriorating water quality, ensuring the continuous and efficient operation of the cooling system.

[0007] In one optional embodiment, the circulation pipeline structure includes a secondary return water pipeline, which includes a main return water pipeline and multiple return water branches; the main return water pipeline is adapted to be connected to the cooling capacity distribution unit; one end of the return water branch is connected to the main return water pipeline, and the other end is adapted to be connected to the liquid cooling cabinet; the water purification system is connected to the main return water pipeline.

[0008] Beneficial effects: Since the system pressure changes during the purification process of cooling water, by setting the water purification system on the main return water pipeline to purify the cooling water flowing out of the liquid cooler cabinet, the impact of excessively high system pressure on the liquid cooler cabinet is reduced.

[0009] In one optional embodiment, the circulation pipeline structure includes a first pipeline structure, which includes a first branch and a first on / off valve. The first branch is located on the main return water pipeline, and the first on / off valve is located on the first branch. The water purification system includes a second pipeline structure, a water storage tank, and a pure water treatment system. The second pipeline structure includes a second branch, a second on / off valve, and a third on / off valve. The second branch is connected to the main return water pipeline and is arranged in parallel with the first branch. The second on / off valve, the water storage tank, and the third on / off valve are sequentially arranged on the first branch. The water storage tank stores pure water, and the pure water treatment system is connected to the water storage tank. The control system is connected to the first on / off valve, the second on / off valve, the third on / off valve, and the pure water treatment system. The control system controls the on / off connection between the pure water treatment system and the water storage tank. The on / off connection of the first branch is controlled by controlling the first on / off valve. The on / off connection of the second branch is controlled by controlling the second and third on / off valves.

[0010] Beneficial effects: The parallel connection of the water purification system and the circulation pipeline structure is achieved through the design of the first and second pipeline structures. The control system controls the on / off state of the first and second branches via the first, second, and third on / off valves. Since the storage tank contains pure water, when the second branch is connected to the circulation pipeline structure, the pure water stored in the storage tank can enter and circulate within the circulation pipeline structure, diluting the raw water within it. Because the control system controls the connection between the pure water treatment system and the storage tank, when the second branch is connected to the circulation pipeline structure, the control system can disconnect the pure water treatment system from the storage tank, ensuring the circulation of the pure water stored in the storage tank within the circulation pipeline structure and the dilution effect on the raw water within the circulation pipeline structure.

[0011] In one optional embodiment, the pure water treatment system includes a secondary raw water pipeline, a water purification device, and an outlet pipeline; one end of the secondary raw water pipeline is connected to a water storage tank; the inlet of the water purification device is connected to the other end of the secondary raw water pipeline; one end of the outlet pipeline is connected to the outlet of the water purification device, and the other end is connected to the water storage tank; a first power pump is provided on the outlet pipeline; a first pressure sensor is provided on the water storage tank; both the first pressure sensor and the first power pump are connected to a control system, which receives pressure data transmitted by the first pressure sensor and controls the start and stop of the first power pump according to the pressure data.

[0012] Beneficial effects: The combined action of the first pressure sensor and the first power pump ensures the proper level of pure water in the storage tank. When the pressure in the storage tank is detected to be low, the control system activates or adjusts the operation of the first power pump, enhancing its suction or replenishment function to promptly add pure water to the storage tank. This effectively prevents the problem of insufficient pure water circulation in the circulation pipeline structure, ensuring the continuity and stability of water circulation in the entire secondary circulation network. Simultaneously, when the pressure in the storage tank is detected to be high, the control system automatically slows down or stops the first power pump from supplying water to the storage tank, effectively preventing the risk of overload and leakage of the storage tank due to excess pure water, as well as the increase in subsequent treatment costs. This ensures the rational utilization of water resources and the long-term stable operation of the system.

[0013] In one optional embodiment, the pure water treatment system further includes an external water source pipeline, one end of which is connected to the inlet of the water purification device, and the other end is adapted to be connected to an external water source; a fourth on / off valve is provided on the external water source pipeline; a raw water tank is provided at the inlet of the water purification device, and a first liquid level sensor is provided on the raw water tank; both the first liquid level sensor and the fourth on / off valve are connected to the control system, which is used to receive the liquid level data transmitted by the first liquid level sensor, and control the on / off of the external water source pipeline by controlling the fourth on / off valve according to the liquid level data.

[0014] Beneficial effects: By setting up an external water source pipeline, it is possible to directly introduce external water into the secondary circulation network without shutting down the system, thus enabling water replenishment to the secondary circulation network; and by setting up a first liquid level sensor and a first on / off valve, the water replenishment rate can be automatically adjusted according to the actual needs of the secondary circulation network, ensuring timely water replenishment to the secondary circulation network and preventing pressure surges or system overload caused by excessive water replenishment, thus ensuring the accuracy and safety of water replenishment operations.

[0015] In one optional embodiment, a second liquid level sensor is provided on the water storage tank, and a second power pump is provided on the secondary raw water pipeline; both the second liquid level sensor and the second power pump are connected to the control system, which is used to receive the liquid level data transmitted by the second liquid level sensor and control the start and stop of the second power pump according to the liquid level data.

[0016] Beneficial effects: By setting up a second liquid level sensor and a second power pump, the liquid level in the water storage tank is monitored. When the second liquid level sensor detects that the liquid level in the water storage tank has dropped below the preset safety threshold, the control system controls the second power pump to shut down, preventing the second power pump from continuing to draw cooling water from the water storage tank into the water purification device. This effectively avoids the phenomenon of the second power pump running dry due to insufficient cooling water in the water storage tank. It not only protects the second power pump from wear and damage and extends its service life, but also prevents the energy waste and safety hazards that may be caused by dry running.

[0017] In one alternative embodiment, the water storage tank is further provided with a breather valve, which is located above the water storage tank.

[0018] Beneficial effects: By installing a breather valve on the top of the water storage tank, it can automatically open or close according to the pressure difference between the inside and outside of the tank, realizing timely exchange of air between the tank and the external environment. When the internal pressure of the tank increases due to changes in liquid level, temperature, or external pressure fluctuations, the breather valve will automatically open to release excess pressure and prevent damage to the tank due to overpressure. When the pressure inside the tank is lower than the outside pressure, the breather valve allows outside air to enter, preventing the tank from deforming due to negative pressure. It optimizes the dynamic balance of the internal pressure environment of the water storage tank, ensuring stable operation of the tank under various working conditions, while protecting the tank structure from unnecessary pressure shocks.

[0019] In one alternative embodiment, the first pressure sensor is connected to the water storage tank via a first connecting pipe, and a first switching valve is provided on the first connecting pipe.

[0020] Beneficial effects: By setting the first connecting pipe and the first switching valve, when the first pressure sensor malfunctions and needs to be replaced, the first switching valve can be closed to disconnect the first pressure sensor from the water storage tank. During the replacement of the first pressure sensor, external contaminants can be prevented from entering the water storage tank, and liquid leakage that may occur when the liquid level in the water storage tank is too high can be avoided.

[0021] In one alternative implementation, a check valve is provided on the outlet pipe.

[0022] Beneficial effect: By installing a one-way valve on the water outlet pipe, the liquid in the water storage tank is prevented from flowing back into the water purification device, thus preventing contamination of the purified water in the device.

[0023] In one optional embodiment, the circulation pipeline structure includes a secondary water supply pipeline, which includes a main water supply pipeline and multiple water supply branches; the main water supply pipeline is adapted to be connected to a cooling capacity distribution unit; one end of each water supply branch is connected to the main water supply pipeline, and the other end is adapted to be connected to a liquid cooling cabinet; a water quality monitoring system is connected to the main water supply pipeline.

[0024] Beneficial effects: By setting up a water quality monitoring system on the main water supply pipeline, the water quality of the cooling water is monitored before it enters the liquid cooling cabinet for heat exchange. This avoids temperature drift interference caused by the rise in cooling water temperature, prevents deviations in monitoring data, and ensures the accuracy of the water quality monitoring system.

[0025] In one optional embodiment, the water quality monitoring system includes a monitoring storage tank and a monitoring component; the monitoring storage tank is connected to a circulation pipeline structure; the monitoring component is fixed on the monitoring storage tank, and the monitoring probe of the monitoring component extends into the monitoring storage tank and contacts the coolant inside the monitoring storage tank.

[0026] Beneficial effects: By monitoring the storage tank, when water flows through the circulation pipeline structure, the storage tank can temporarily store a certain amount of water, thereby stabilizing the water flow, reducing the impact of water flow fluctuations or pressure changes on the monitoring components, and improving the stability and accuracy of water quality monitoring.

[0027] In one optional embodiment, the water quality monitoring system further includes a third pipeline structure, which includes a third branch, a first manual valve, and a second manual valve; the third branch is connected in parallel with the main water supply pipeline; the first manual valve, the monitoring storage tank, and the second manual valve are sequentially arranged on the third branch.

[0028] Beneficial effects: By installing the monitoring storage tank on the third branch, the requirements of low flow and low pressure testing environments can be met; and since the first manual valve, the monitoring storage tank, and the second manual valve are sequentially arranged on the third branch, when calibration, replacement, or maintenance of the monitoring components is required, the operator only needs to close the first and second manual valves to cut off the fluid channel between the monitoring storage tank and the main water supply pipeline, achieving local isolation; this process does not require interruption of the normal operation of the entire secondary circulation network, effectively ensuring the continuity of the secondary circulation network operation.

[0029] In one optional embodiment, the monitoring storage tank includes a baffle located between the inlet and outlet of the monitoring storage tank and spaced apart from the top of the monitoring storage tank; the monitoring component is located on the side of the baffle near the inlet of the monitoring storage tank, and the distance between the monitoring probe of the monitoring component and the bottom of the monitoring storage tank is less than the height of the baffle.

[0030] Beneficial effects: Due to the spacing between the baffle and the top of the monitoring liquid tank, the cooling water can continue to flow through the outlet when it flows into the monitoring liquid tank and reaches or exceeds the height of the baffle, thus maintaining the circulation of the cooling water. By placing the monitoring component on the side of the baffle near the inlet, and ensuring that the distance between the monitoring probe of the monitoring component and the bottom of the monitoring liquid tank is less than the height of the baffle, when draining the secondary circulation network, the side of the baffle near the inlet can maintain a certain liquid level, which can cover and protect the monitoring probe of the monitoring component, preventing the monitoring probe from the risk of oxidation that may be caused by prolonged exposure to air.

[0031] In one alternative implementation, the monitoring reservoir includes an vent valve located at the top of the monitoring reservoir.

[0032] Beneficial effects: By installing an exhaust valve on the monitoring liquid storage tank, the problem of gas accumulation that may occur during the liquid storage process can be avoided, ensuring smooth flow of cooling water and stable operation of the system; preventing excessive gas content in the monitoring liquid storage tank from affecting test data, and reducing the oxygen content in the cooling water in the monitoring liquid storage tank, thus protecting the monitoring probe of the monitoring component.

[0033] In one alternative embodiment, the monitoring reservoir includes a sampling valve disposed below the monitoring reservoir.

[0034] Beneficial effects: By installing a sampling valve on the monitoring storage tank, it can be used to perform other data tests that cannot be completed by online monitoring. The sample analysis results obtained by the sampling valve can be compared with the monitoring data of the monitoring components to promptly identify and correct deviations or errors in the online monitoring of the monitoring components, and to promptly repair, adjust or replace the monitoring components to ensure the accuracy and reliability of the online test results.

[0035] In one optional embodiment, a filtration structure is further included, comprising a filtration status monitoring unit and a filtration pipeline; the filtration status monitoring unit includes a second pressure sensor and a third pressure sensor, which are sequentially and alternately arranged on the circulation pipeline structure; the filtration pipeline is located between the second and third pressure sensors and connected to the circulation pipeline structure; and a coarse filter is provided on the filtration pipeline; both the second and third pressure sensors are connected to the control system and transmit inlet pressure and outlet pressure to the control system, and the control system determines the filter element status of the coarse filter by the difference between the inlet pressure and the outlet pressure.

[0036] Beneficial effects: By installing a coarse filter in the filter pipeline, suspended particles and various impurities in the cooling water are effectively removed; the filter status monitoring unit enables real-time monitoring of the working status of the coarse filter. When the pressure difference between the inlet and outlet exceeds the preset threshold, the control system will automatically remind relevant maintenance personnel to clean or replace the coarse filter element to ensure the continuous and efficient operation of the filter structure.

[0037] In one alternative embodiment, at least two filter lines are provided, and the at least two filter lines are arranged in parallel; the filter lines are also provided with a third manual valve and a fourth manual valve, and the coarse filter is located between the third manual valve and the fourth manual valve.

[0038] Beneficial effects: The third and fourth manual valves work together to control the on / off state of the filter pipeline. By setting at least two filter pipelines, a dual filter pipeline design with one in use and one in standby is achieved. While the secondary side circulation network is running continuously, the filter element can be cleaned and replaced, and the filter pipeline can be maintained.

[0039] In one alternative embodiment, a needle valve is also provided on the filter line, and the needle valve is arranged adjacent to the coarse filter.

[0040] Beneficial effects: By installing a needle valve on the filter pipeline, the pressure accumulated in the coarse filter can be safely released, ensuring pressure balance during system operation; it can also remove the cooling water trapped inside the coarse filter, preventing performance degradation and potential corrosion risks caused by cooling water accumulation, thereby maintaining the cleanliness and long-term operating efficiency of the filtration system; and it ensures that no pure water flows out during the filter replacement process.

[0041] In one alternative embodiment, the second pressure sensor is connected to the circulation pipeline structure via a second connecting pipe, and a second switching valve is provided on the second connecting pipe.

[0042] Beneficial effects: By setting up the second connecting pipe and the second switching valve, when the second pressure sensor malfunctions and needs to be replaced, the second switching valve can be closed to disconnect the connection between the second pressure sensor and the circulation pipeline structure. During the replacement of the second pressure sensor, it can prevent external contaminants from entering the circulation pipeline structure and avoid liquid leakage in the circulation pipeline structure. Furthermore, it enables the replacement of the second pressure sensor without shutting down the system.

[0043] In one alternative embodiment, the third pressure sensor is connected to the circulation pipeline structure via the second connecting pipe, and the third connecting pipe is equipped with a third switching valve.

[0044] Beneficial effects: By setting up the third connecting pipe and the third switching valve, when the third pressure sensor malfunctions and needs to be replaced, the third switching valve can be closed to disconnect the connection between the third pressure sensor and the circulation pipeline structure. During the replacement of the third pressure sensor, it can prevent external contaminants from entering the circulation pipeline structure and avoid liquid leakage within the circulation pipeline structure. Furthermore, it enables the replacement of the third pressure sensor without shutting down the system.

[0045] Secondly, the present invention also provides a data center liquid cooling system, including a cooling capacity distribution unit, the aforementioned secondary side circulation network and primary side circulation network; the aforementioned secondary side circulation network circulates between the cooling capacity distribution unit and the liquid cooling cabinet; the primary side circulation network circulates between the cooling capacity distribution unit and external cooling equipment.

[0046] Since the data center liquid cooling system includes a secondary circulation network, which has the same effect as the secondary circulation network, it will not be elaborated here. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the overall structure of the data center liquid cooling system according to an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of the water purification system according to an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the pure water treatment system according to an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of the water quality monitoring system and filtration structure according to an embodiment of the present invention.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Circulation Piping Structure; 111. First Branch; 112. First On / Off Valve; 12. Secondary Side Return Water Piping; 121. Main Return Water Piping; 122. Return Water Branch; 13. Secondary Side Supply Water Piping; 131. Main Supply Water Piping; 132. Supply Branch; 2. Water Quality Monitoring System; 21. Monitoring Storage Tank; 211. Baffle; 212. Air Vent Valve; 213. Sampling Valve; 221. Conductivity Sensor; 222. pH Sensor; 223. Turbidity Sensor; 224. Online Chemical Oxygen Demand (COD) Sensor; 231. Third branch; 232, First manual valve; 233, Second manual valve; 3, Water purification system; 311, Second branch; 312, Second on / off valve; 313, Third on / off valve; 32, Water storage tank; 321, First pressure sensor; 322, Second liquid level sensor; 323, Breathing valve; 33, Pure water treatment system; 331, Secondary side raw water pipeline; 33201, Raw water tank; 33202, First liquid level sensor; 33203, Booster pump; 33204, Sand filter structure; 33205, Carbon filter structure; 3 3206. Softener; 33207. Scale inhibitor structure; 33208. Precision filter; 33209. First high-pressure pump; 33210. First-stage RO permeation structure; 33211. Pure water tank; 33212. Second high-pressure pump; 33213. pH adjustment structure; 33214. Second-stage RO permeation structure; 33215. Chemical cleaning structure; 33216. Ultrapure water tank; 33217. Overflow pipe; 33218. Fifth shut-off valve; 333. Outlet pipe; 334. First power pump; 335. External 336. Water source pipeline; 337. Fourth on / off valve; 338. Second power pump; 411. Check valve; 4111. Second pressure sensor; 4111. First on / off valve; 412. Third pressure sensor; 42. Filter pipeline; 43. Coarse filter; 44. Third manual valve; 45. Fourth manual valve; 46. Needle valve; 5. Cooling capacity distribution unit; 6. Liquid cooling cabinet; 71. Water-cooled unit; 72. Circulating pump; 73. Constant pressure water supply system; 74. Softening dosing system; 75. Primary side water supply pipeline; 76. Primary side return water pipeline. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0056] According to an embodiment of the present invention, a secondary side circulation network is provided, including a circulation pipeline structure 1, a water quality monitoring system 2, a water quality purification system 3, and a control system; the circulation pipeline structure 1 is adapted to form a circulation loop between a cooling capacity distribution unit 5 and a liquid cooling cabinet 6; the water quality monitoring system 2 is disposed on the circulation pipeline structure 1; the water quality purification system 3 is disposed in parallel with the circulation pipeline structure 1 for diluting and purifying the water in the circulation pipeline structure 1; the control system is connected to both the water quality monitoring system 2 and the water quality purification system 3 for receiving water quality data transmitted by the water quality monitoring system 2 and controlling the on / off connection between the water quality purification system 3 and the circulation pipeline structure 1 according to the water quality data.

[0057] By setting up water quality monitoring system 2, real-time monitoring of the water quality within the circulation pipeline structure 1 is achieved. Water quality monitoring system 2 is connected to the control system, transmitting the monitored water quality data to the control system in real time. Since water purification system 3 is connected in parallel with circulation pipeline structure 1 and is also connected to the control system, when water quality monitoring system 2 detects that the water quality meets the standards, the connection between water purification system 3 and circulation pipeline structure 1 is disconnected. Cooling water flows normally within circulation pipeline structure 1 without any additional processing burden, avoiding unnecessary energy consumption and resource waste during the purification process. When water quality monitoring system 2 detects that the water quality does not meet the standards, the connection between water purification system 3 and circulation pipeline structure 1 is reconnected, and water purification system 3 dilutes and purifies the water within circulation pipeline structure 1. This ensures real-time monitoring and immediate feedback of the water quality of the secondary side pure water cooling medium. Furthermore, without interrupting the operation of the cooling system or interfering with the system's water temperature stability and pressure balance, it enables immediate intervention and restoration of deteriorating water quality, ensuring the continuous and efficient operation of the cooling system.

[0058] In one embodiment, the circulation pipeline structure 1 includes a secondary return water pipeline 12, which includes a main return water pipeline 121 and multiple return water branch pipelines 122. The main return water pipeline 121 is adapted to be connected to the cooling capacity distribution unit 5. One end of the return water branch pipeline 122 is connected to the main return water pipeline 121, and the other end is adapted to be connected to the liquid cooling cabinet 6. The water purification system 3 is connected to the main return water pipeline 121.

[0059] Since the system pressure changes during the purification process of the water purification system 3, by setting the water purification system 3 on the main return water pipeline 121, the cooling water flowing out of the liquid cooling cabinet 6 is purified, thereby reducing the impact of excessively high system pressure on the liquid cooling cabinet 6.

[0060] In one embodiment, the circulation pipeline structure 1 includes a first pipeline structure, which includes a first branch 111 and a first on / off valve 112. The first branch 111 is disposed on the main return water pipeline 121, and the first on / off valve 112 is disposed on the first branch 111. The water purification system 3 includes a second pipeline structure, a water storage tank 32, and a pure water treatment system 33. The second pipeline structure includes a second branch 311, a second on / off valve 312, and a third on / off valve 313. The second branch 311 is connected to the main return water pipeline 121 and is disposed in parallel with the first branch 111. A shut-off valve 312, a water storage tank 32, and a third shut-off valve 313 are sequentially installed on the first branch 111. The water storage tank 32 contains pure water, and the pure water treatment system 33 is connected to the water storage tank 32. The control system is connected to the first shut-off valve 112, the second shut-off valve 312, the third shut-off valve 313, and the pure water treatment system 33. The control system controls the on / off connection between the pure water treatment system 33 and the water storage tank 32. The first shut-off valve 112 controls the on / off connection of the first branch 111. The second shut-off valve 312 and the third shut-off valve 313 control the on / off connection of the second branch 311.

[0061] By setting up the first and second pipeline structures, the water purification system 3 and the circulation pipeline structure 1 are connected in parallel. The control system controls the on / off state of the first branch 111 and the second branch 311 through the first on / off valve 112, the second on / off valve 312, and the third on / off valve 313. Since the water storage tank 32 stores pure water, when the second branch 311 is connected to the circulation pipeline structure 1, the pure water stored in the water storage tank 32 can enter the circulation pipeline structure 1 and circulate within it, diluting the raw water in the circulation pipeline structure 1. Since the control system controls the on / off state between the pure water treatment system 33 and the water storage tank 32, when the second branch 311 is connected to the circulation pipeline structure 1, the control system can control the pure water treatment system 33 to disconnect from the water storage tank 32, ensuring the circulation of the pure water stored in the water storage tank 32 within the circulation pipeline structure 1 and the dilution effect on the raw water in the circulation pipeline structure 1.

[0062] In a specific implementation, when the water quality data reaches the set standard, the control system controls the flow of the first branch 111 by opening the first on-off valve 112; controls the disconnection of the second branch 311 by closing the second on-off valve 312 and the third on-off valve 313; and at this time, the control system controls the pure water treatment system 33 to disconnect from the water storage tank 32.

[0063] When the water quality data fails to meet the set standard, the control system closes the first on-off valve 112, disconnects the first branch 111, and opens the second on-off valve 312 and the third on-off valve 313 to control the flow of the second branch 311. Meanwhile, pure water from the storage tank 32 enters the circulation pipeline structure 1 to dilute the water in the circulation pipeline structure 1. At this time, the control system disconnects the pure water treatment system 33 from the storage tank 32. When the connection time between the second branch 311 and the circulation pipeline structure 1 reaches the preset time, the control system closes the first on-off valve... When valve 112 is opened, the flow of the first branch 111 is controlled. The second branch 311 is disconnected by controlling the second shut-off valve 312 and the third shut-off valve 313 to close. At this time, the control system controls the pure water treatment system 33 to connect with the water storage tank 32 to purify the liquid in the water storage tank 32. After the treatment is completed, the control system controls the second branch 311 to connect with the circulation pipeline structure 1 again. The pure water in the water storage tank 32 re-enters the circulation pipeline structure 1 to dilute the cooling water in the circulation pipeline structure 1 for a second time. Then the above steps are repeated until the water quality meets the standards.

[0064] In a specific implementation, since the water purification system 3 is connected in parallel with the circulation pipeline structure 1, when water purification is required, it is only necessary to control the water purification system 3 to connect with the circulation pipeline structure 1 through the control system. There is no need to drain and replace the internal cooling water to achieve the dilution and purification of the cooling water in the circulation pipeline structure 1. Compared with the traditional method of draining and replacing the cooling water in the pipeline network to achieve the purpose of water quality improvement, this method effectively saves water resources, reduces the burden of wastewater treatment and discharge, and significantly reduces the direct material costs and operating costs caused by replacing cooling water, thereby achieving a dual improvement in economic and environmental benefits.

[0065] In a specific implementation, the first on / off valve 112, the second on / off valve 312, and the third on / off valve 313 are all electric ball valves.

[0066] In one embodiment, the pure water treatment system 33 includes a secondary raw water pipeline 331, a water purification device, and an outlet pipeline 333. One end of the secondary raw water pipeline 331 is connected to a water storage tank 32. The inlet of the water purification device is connected to the other end of the secondary raw water pipeline 331. One end of the outlet pipeline 333 is connected to the outlet of the water purification device, and the other end is connected to the water storage tank 32. A first power pump 334 is provided on the outlet pipeline 333. A first pressure sensor 321 is provided on the water storage tank 32. Both the first pressure sensor 321 and the first power pump 334 are connected to the control system. The control system is used to receive the pressure data transmitted by the first pressure sensor 321 and control the start and stop of the first power pump 334 according to the pressure data.

[0067] With the coordinated action of the first pressure sensor 321 and the first power pump 334, the liquid level of pure water in the water storage tank 32 is maintained. When the pressure in the water storage tank 32 is detected to be low, the control system controls the start of the first power pump 334 or adjusts its operating status. By enhancing the suction or replenishment function, pure water is replenished to the water storage tank 32 in a timely manner, thereby effectively avoiding the problem of insufficient pure water to circulate in the circulation pipeline structure 1, and ensuring the continuity and stability of water circulation in the entire secondary side circulation network. At the same time, when the pressure in the water storage tank 32 is detected to be high, the control system controls the first power pump 334 to automatically slow down or stop further water supply to the water storage tank 32, effectively preventing the risk of overload and leakage of the water storage tank 32 and the increase in subsequent treatment costs that may be caused by excess pure water, ensuring the rational use of water resources and the long-term stable operation of the system.

[0068] Specifically, the first power pump 334 is a diaphragm pump.

[0069] In a specific implementation, the water purification device includes a main pipeline, a booster pump 33203, a sand filter structure 33204, a carbon filter structure 33205, a softener 33206, a scale inhibitor structure 33207, a precision filter 33208, a first high-pressure pump 33209, a first-stage RO permeation structure 33210, a pure water tank 33211, a second high-pressure pump 33212, a pH adjustment structure 33213, a second-stage RO permeation structure 33214, a chemical cleaning structure 33215, and an ultrapure water tank 33216. The main pipeline is connected to the outlet end of the raw water tank 33201. 0. The pure water tank 33211, the second high-pressure pump 33212, the secondary RO permeation structure 33214, and the ultrapure water tank 33216 are sequentially connected in series on the main pipeline; the scale inhibitor structure 33207 is located between the softener 33206 and the precision filter 33208, and is connected to the main pipeline through the fourth connecting pipe; the chemical cleaning structure 33215 is located on the fifth connecting pipe, with one end of the fifth connecting pipe located between the primary RO permeation structure 33210 and the pure water tank 33211, and connected to the main pipeline; the other end is located between the secondary RO permeation structure 33214 and the ultrapure water tank 33216, and is connected to the main pipeline; the pH adjustment structure 33213 is located between the second high-pressure pump 33212 and the secondary RO permeation structure 33214, and is connected to the main pipeline through the sixth connecting pipe.

[0070] In one embodiment, the pure water treatment system 33 further includes an external water source pipeline 335, one end of which is connected to the inlet of the water purification device, and the other end is adapted to be connected to an external water source; a fourth on / off valve 336 is provided on the external water source pipeline 335; a raw water tank 33201 is provided at the inlet of the water purification device, and a first liquid level sensor 33202 is provided on the raw water tank 33201; both the first liquid level sensor 33202 and the fourth on / off valve 336 are connected to the control system, which is used to receive the liquid level data transmitted by the first liquid level sensor 33202, and control the on / off of the external water source pipeline 335 by controlling the fourth on / off valve 336 according to the liquid level data.

[0071] By installing the external water supply pipeline 335, external water can be directly introduced into the secondary circulation network without shutting down the system, enabling water replenishment to the secondary circulation network. Furthermore, by installing the first liquid level sensor 33202 and the first on / off valve 112, the water replenishment rate can be automatically adjusted according to the actual needs of the secondary circulation network, ensuring timely water replenishment to the secondary circulation network and preventing pressure surges or system overload caused by excessive water replenishment, thus ensuring the accuracy and safety of the water replenishment operation.

[0072] Preferably, multiple leakage monitoring devices are installed on different connecting pipe sections of the secondary circulation network's circulation pipeline structure 1 to monitor leakage in different connecting pipe sections. Each leakage monitoring device integrates an independent alarm unit, achieving integrated monitoring and response. All leakage monitoring devices are connected to the control system. Once a leakage monitoring device detects a leakage event in its corresponding connecting pipe section, it transmits the leakage information to the control system. Upon receiving the leakage information, the control system controls the corresponding alarm unit to issue an alarm signal, ensuring the accuracy and timeliness of fault identification. This allows operators to intuitively and quickly locate the specific connecting pipe section where the leak occurred and repair or replace the damaged connecting pipe section, preventing leakage from recurring in the secondary circulation network after water replenishment operations are completed, and ensuring the stable operation and long-term reliability of the entire network.

[0073] In a specific implementation, when purification is required in the secondary circulation network, to prevent the raw water tank 33201 from having an excessively high liquid level, an overflow pipe 33217 is added to the bottom of the raw water tank 33201, and a fifth on / off valve 33218 is installed on the overflow pipe 33217. The control system controls the opening and closing of the overflow pipe 33217 by controlling the fifth on / off valve 33218 based on the liquid level data received from the first liquid level sensor 33202.

[0074] Specifically, both the fourth shut-off valve 336 and the fifth shut-off valve 33218 are solenoid valves.

[0075] In one embodiment, a second liquid level sensor 322 is provided on the water storage tank 32, and a second power pump 337 is provided on the secondary raw water pipeline 331; both the second liquid level sensor 322 and the second power pump 337 are connected to the control system, which is used to receive the liquid level data transmitted by the second liquid level sensor 322 and control the start and stop of the second power pump 337 according to the liquid level data.

[0076] By setting up the second liquid level sensor 322 and the second power pump 337, the liquid level in the water storage tank 32 is monitored. When the second liquid level sensor 322 detects that the liquid level in the water storage tank 32 drops below the preset safety threshold, the control system controls the second power pump 337 to shut down, preventing the second power pump 337 from continuing to draw cooling water from the water storage tank 32 into the water purification device. This effectively avoids the phenomenon of the second power pump 337 running dry due to insufficient cooling water in the water storage tank 32. It not only protects the second power pump 337 from wear and damage and extends its service life, but also prevents energy waste and safety hazards that may be caused by dry running.

[0077] Specifically, the second power pump 337 is a diaphragm pump.

[0078] In one embodiment, the water storage tank 32 is also provided with a breather valve 323, which is located above the water storage tank 32.

[0079] By installing a breather valve 323 above the water storage tank 32, the valve can automatically open or close according to the pressure difference between the inside and outside of the water storage tank 32, realizing timely exchange between the air inside the water storage tank 32 and the external environment. When the internal pressure of the water storage tank 32 increases due to changes in liquid level, temperature, or external pressure fluctuations, the breather valve 323 will automatically open to release excess pressure and prevent damage to the tank due to overpressure. When the pressure inside the water storage tank 32 is lower than that outside, the breather valve 323 allows outside air to enter, preventing the tank from deforming due to negative pressure. This optimizes the dynamic balance of the internal pressure environment of the water storage tank 32, ensuring stable operation of the water storage tank 32 under various working conditions, while protecting the tank structure from unnecessary pressure shocks.

[0080] In one embodiment, the first pressure sensor 321 is connected to the water storage tank 32 via a first connecting pipe, and a first switching valve 4111 is provided on the first connecting pipe.

[0081] By using the first connecting pipe and the first switching valve 4111, when the first pressure sensor 321 malfunctions and needs to be replaced, the first switching valve 4111 can be closed to disconnect the first pressure sensor 321 from the water storage tank 32. During the replacement of the first pressure sensor 321, external contaminants can be prevented from entering the water storage tank 32, and liquid leakage that may occur when the liquid level in the water storage tank 32 is too high can also be avoided.

[0082] Specifically, the first switching valve 4111 is a manual ball valve.

[0083] In one embodiment, a one-way valve 338 is provided on the water outlet pipe 333.

[0084] By installing a one-way valve 338 on the water outlet pipe 333, the liquid in the water storage tank 32 is prevented from flowing back into the water purification device, thus preventing contamination of the purified water in the water purification device.

[0085] In one embodiment, the circulation pipeline structure 1 includes a secondary water supply pipeline 13, which includes a main water supply pipeline 131 and multiple water supply branches 132. The main water supply pipeline 131 is adapted to be connected to the cooling capacity distribution unit 5. One end of the water supply branch 132 is connected to the main water supply pipeline 131, and the other end is adapted to be connected to the liquid cooling cabinet 6. The water quality monitoring system 2 is connected to the main water supply pipeline 131.

[0086] By installing the water quality monitoring system 2 on the main water supply pipeline 131, the water quality of the cooling water is monitored before the cooling water enters the liquid cooling cabinet 6 for heat exchange. This avoids temperature drift interference caused by the rise in cooling water temperature, prevents deviations in monitoring data, and ensures the accuracy of the water quality monitoring system 2.

[0087] In one embodiment, the water quality monitoring system 2 includes a monitoring storage tank 21 and a monitoring component; the monitoring storage tank 21 is connected to the circulation pipeline structure 1; the monitoring component is fixed on the monitoring storage tank 21, and the monitoring probe of the monitoring component extends into the monitoring storage tank 21 and contacts the coolant in the monitoring storage tank 21.

[0088] By monitoring the storage tank 21, when water flows through the circulation pipeline structure 1, the storage tank 21 can temporarily store a certain amount of water, thereby stabilizing the water flow, reducing the impact of water flow fluctuations or pressure changes on the monitoring components, and improving the stability and accuracy of water quality monitoring.

[0089] In a specific implementation, the monitoring components include a conductivity sensor 221, a pH sensor 222, a turbidity sensor 223, and an online chemical oxygen demand (COD) detection sensor, and the conductivity sensor 221, pH sensor 222, turbidity sensor 223, and online chemical oxygen demand detection sensor 224 are sequentially arranged on the monitoring storage tank 21.

[0090] In one embodiment, the water quality monitoring system 2 further includes a third pipeline structure, which includes a third branch 231, a first manual valve 232, and a second manual valve 233; the third branch 231 is connected in parallel with the main water supply pipeline 131; the first manual valve 232, the monitoring storage tank 21, and the second manual valve 233 are sequentially arranged on the third branch 231.

[0091] By installing the monitoring storage tank 21 on the third branch 231, the requirements for low flow and low pressure testing environments can be met. Furthermore, since the first manual valve 232, the monitoring storage tank 21, and the second manual valve 233 are sequentially arranged on the third branch 231, when calibration, replacement, or maintenance of the monitoring components is required, the operator only needs to close the first manual valve 232 and the second manual valve 233 to cut off the fluid channel between the monitoring storage tank 21 and the main water supply pipeline 131, thus achieving local isolation. This process does not require interruption of the normal operation of the entire secondary circulation network, effectively ensuring the continuity of the secondary circulation network operation.

[0092] In one embodiment, the monitoring storage tank 21 includes a baffle 211 located between the inlet and outlet of the monitoring storage tank 21 and spaced apart from the top of the monitoring storage tank 21; the monitoring component is located on the side of the baffle 211 near the inlet of the monitoring storage tank 21, and the distance between the monitoring probe of the monitoring component and the bottom of the monitoring storage tank 21 is less than the height of the baffle 211.

[0093] Because the baffle 211 is spaced apart from the top of the monitoring liquid storage tank 21, it ensures that when the cooling water flows into the monitoring liquid storage tank 21 and reaches or exceeds the height of the baffle 211, it can continue to flow through the outlet, maintaining the circulation of the cooling water. By setting the monitoring component on the side of the baffle 211 near the inlet, and the distance between the monitoring probe of the monitoring component and the bottom of the monitoring liquid storage tank 21 is less than the height of the baffle 211, when draining the secondary circulation network, the side of the baffle 211 near the inlet can maintain a certain liquid level, which can cover and protect the monitoring probe of the monitoring component, preventing the monitoring probe of the monitoring component from the risk of oxidation that may be caused by prolonged exposure to air.

[0094] In a specific implementation, the water outlet is located below the monitoring storage tank 21, and the distance between the water outlet and the bottom of the monitoring storage tank 21 is less than the height of the baffle 211.

[0095] In one embodiment, the monitoring storage tank 21 includes an exhaust valve 212, which is disposed on the top of the monitoring storage tank 21.

[0096] By installing an exhaust valve 212 on the monitoring liquid storage tank 21, the problem of gas accumulation that may occur in the monitoring liquid storage tank 21 during the liquid storage process can be avoided, ensuring smooth flow of cooling water and stable operation of the system; preventing excessive gas content in the monitoring liquid storage tank 21 from affecting test data, and reducing the oxygen content in the cooling water in the monitoring liquid storage tank 21 to protect the monitoring probe of the monitoring component.

[0097] In one embodiment, the monitoring storage tank 21 includes a sampling valve 213 disposed below the monitoring storage tank 21.

[0098] By installing a sampling valve 213 on the monitoring storage tank 21, it can be used to perform other data tests that cannot be completed by online monitoring. It can also compare the sample analysis results obtained by the sampling valve 213 with the monitoring data of the monitoring component, so as to promptly detect and correct deviations or errors in the online monitoring of the monitoring component, and promptly repair, adjust or replace the monitoring component to ensure the accuracy and reliability of the online test results.

[0099] In one embodiment, a filtration structure is further included, comprising a filtration status monitoring unit and a filtration pipeline 42. The filtration status monitoring unit includes a second pressure sensor 411 and a third pressure sensor 412, which are sequentially and spaced apart on the circulation pipeline structure 1. The filtration pipeline 42 is located between the second pressure sensor 411 and the third pressure sensor 412 and is connected to the circulation pipeline structure 1. A coarse filter 43 is provided on the filtration pipeline 42. Both the second pressure sensor 411 and the third pressure sensor 412 are connected to the control system and transmit inlet pressure and outlet pressure to the control system. The control system determines the filter element status of the coarse filter 43 by the difference between the inlet pressure and the outlet pressure.

[0100] By installing a coarse filter 43 on the filter pipeline 42, suspended particles and various impurities in the cooling water are effectively removed. The filter status monitoring unit enables real-time monitoring of the working status of the coarse filter 43. When the pressure difference between the inlet and outlet exceeds the preset threshold, the control system will automatically remind relevant maintenance personnel to clean or replace the filter element of the coarse filter 43 to ensure the continuous and efficient operation of the filter structure.

[0101] In a specific implementation, the filter structure is installed on the main water supply pipeline 131, and the filter structure and the water quality monitoring system 2 are arranged sequentially along the flow direction of the cooling water. This effectively intercepts suspended particles and various impurities in the cooling water, ensuring the purity of the cooling water entering the water quality monitoring system 2 and the liquid cooling cabinet 6, reducing adverse effects on the water quality monitoring system 2 and the liquid cooling cabinet 6, and ensuring the efficient and stable operation of the overall system.

[0102] Specifically, coarse filter 43 is a Y-type filter.

[0103] In one embodiment, at least two filter lines 42 are provided, and the at least two filter lines 42 are arranged in parallel; a third manual valve 44 and a fourth manual valve 45 are also provided on the filter lines 42, and the coarse filter 43 is located between the third manual valve 44 and the fourth manual valve 45.

[0104] The third manual valve 44 and the fourth manual valve 45 work together to control the on / off state of the filter pipeline 42. By setting at least two filter pipelines 42, a dual filter pipeline 42 design with one in use and one in standby is realized. While the secondary side circulation network is running continuously, the cleaning and replacement of the filter element and the maintenance of the filter pipeline 42 can be realized.

[0105] In one embodiment, a needle valve 46 is also provided on the filter line 42, and the needle valve 46 is arranged adjacent to the coarse filter 43.

[0106] By installing a needle valve 46 on the filter pipeline 42, the pressure accumulated in the coarse filter 43 can be safely released, ensuring pressure balance during system operation; it can also remove the cooling water trapped inside the coarse filter 43, preventing performance degradation and potential corrosion risks caused by cooling water accumulation, thereby maintaining the cleanliness and long-term operating efficiency of the filtration system; and ensuring that no pure water flows out during the filter element replacement process.

[0107] In one embodiment, the second pressure sensor 411 is connected to the circulation pipeline structure 1 via a second connecting pipe, and a second switching valve is provided on the second connecting pipe.

[0108] By using the second connecting pipe and the second switching valve, when the second pressure sensor 411 malfunctions and needs to be replaced, the second switching valve can be closed to disconnect the second pressure sensor 411 from the circulation pipeline structure 1. During the replacement of the second pressure sensor 411, external contaminants can be prevented from entering the circulation pipeline structure 1, and liquid leakage in the circulation pipeline structure 1 can be avoided. Furthermore, the replacement of the second pressure sensor 411 can be achieved without shutting down the machine.

[0109] In one embodiment, the third pressure sensor 412 is connected to the circulation pipeline structure 1 via a second connecting pipe, and a third switching valve is provided on the third connecting pipe.

[0110] By using the third connecting pipe and the third switching valve, when the third pressure sensor 412 malfunctions and needs to be replaced, the third switching valve can be closed to disconnect the connection between the third pressure sensor 412 and the circulation pipeline structure 1. During the replacement of the third pressure sensor 412, external contaminants can be prevented from entering the circulation pipeline structure 1, and liquid leakage in the circulation pipeline structure 1 can be avoided. Furthermore, the replacement of the third pressure sensor 412 can be achieved without shutting down the system.

[0111] According to an embodiment of the present invention, another aspect provides a data center liquid cooling system, including a cooling capacity distribution unit 5, the aforementioned secondary-side circulation network and primary-side circulation network; the aforementioned secondary-side circulation network is circulatedly connected to the cooling capacity distribution unit 5 and the liquid cooling cabinet 6; the primary-side circulation network is circulatedly connected to the cooling capacity distribution unit 5 and external cooling equipment.

[0112] In a specific implementation, the primary-side circulation network includes a water-cooled unit 71, two sets of circulating pumps 72, a constant-pressure water supply system 73, a softening dosing system 74, a primary-side water supply pipeline 75, and a primary-side water return pipeline 76. The primary-side water supply pipeline 75 and the primary-side water return pipeline 76 are circulatedly connected to the water-cooled unit 71 and the cooling capacity distribution unit 5, so that the cooling water circulates between the water-cooled unit 71 and the cooling capacity distribution unit 5. The low-temperature cooling water is transported to the inlet of the cooling capacity distribution unit 5 through the primary-side water supply pipeline 75. Then, in the cooling capacity distribution unit 5, the low-temperature cooling water on the primary side absorbs the heat of the high-temperature cooling water on the secondary side, thereby reducing the temperature of the cooling water on the secondary side. After the heat exchange is completed, the primary-side cooling water with the increased temperature flows back to the return port of the water-cooled unit 71 through the primary-side water return pipeline 76.

[0113] Specifically, the softening dosing system 74 is connected to the constant pressure water supply system 73, and the constant pressure water supply system 73 is installed on the primary side return water pipeline 76.

[0114] Specifically, a circulation pump 72 is installed on the primary water supply pipeline 75; a first connecting branch is provided between the primary water supply pipeline 75 and the primary water return pipeline 76, and another circulation pump 72 is installed on the first connecting branch.

[0115] In a specific implementation, to avoid the end effect of the pipeline system, both the secondary return water pipeline 12 and the secondary supply water pipeline 13 are set as ring networks to ensure the consistency of pressure and flow in the secondary return water pipeline 12 and the secondary supply water pipeline 13, and to avoid large differences in the flow and pressure of the liquid-cooled server flowing through the liquid-cooled cabinet 6.

[0116] Specifically, the cooling capacity distribution unit 5 is provided in two sets, realizing a design of one in use and one in standby. The secondary side return water pipe 12 is connected to the two sets of cooling capacity distribution units 5 through two second connecting branches respectively; the secondary side supply water pipe 13 is connected to the two sets of cooling capacity distribution units 5 through two third connecting branches respectively; the primary side supply water pipe 75 is connected to the two sets of cooling capacity distribution units 5 through two fourth connecting branches respectively; and the primary side return water pipe 76 is connected to the two sets of cooling capacity distribution units 5 through two fifth connecting branches respectively.

[0117] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A secondary-side circulation pipe network, characterized in that, include: The circulating pipeline structure (1) is suitable for forming a circulating loop between the cooling capacity distribution unit (5) and the liquid cooling cabinet (6); A water quality monitoring system (2) is installed on the circulating pipeline structure (1); A water purification system (3) is connected in parallel with the circulation pipeline structure (1) and is used to dilute and purify the water in the circulation pipeline structure (1). The control system is connected to both the water quality monitoring system (2) and the water purification system (3), and is used to receive water quality data transmitted by the water quality monitoring system (2), and control the connection and disconnection between the water purification system (3) and the circulation pipeline structure (1) according to the water quality data. The circulating pipeline structure (1) includes a secondary side return water pipeline (12), which includes a main return water pipeline (121) and multiple return water branches (122). The main return water pipeline (121) is adapted to be connected to the cooling capacity distribution unit (5). One end of each return water branch (122) is connected to the main return water pipeline (121), and the other end is adapted to be connected to the liquid cooling cabinet (6). The water purification system (3) is connected to the main return water pipeline (121). The circulating pipeline structure (1) includes a first pipeline structure, which includes a first branch (111) and a first on / off valve (112). The first branch (111) is located on the main return water pipeline (121), and the first on / off valve (112) is located on the first branch (111). The water purification system (3) includes a second pipeline structure, a water storage tank (32), and a pure water treatment system (33); the second pipeline structure includes a second branch (311), a second on / off valve (312), and a third on / off valve (313). The second branch (311) is connected to the main return water pipeline (121) and is set in parallel with the first branch (111). The second on / off valve (312), the water storage tank (32) and the third on / off valve (313) are sequentially arranged on the first branch (111); the water storage tank (32) stores pure water, and the pure water treatment system (33) is connected to the water storage tank (32); The control system is connected to the first on / off valve (112), the second on / off valve (312), the third on / off valve (313), and the pure water treatment system (33); The control system controls the connection and disconnection between the pure water treatment system (33) and the water storage tank (32); controls the connection and disconnection of the first branch (111) by controlling the first on / off valve (112); controls the connection and disconnection of the second branch (311) by controlling the second on / off valve (312) and the third on / off valve (313); The water quality monitoring system (2) includes: The monitoring storage tank (21) is connected to the circulation pipeline structure (1); The monitoring component is fixed on the monitoring storage tank (21), and the monitoring probe of the monitoring component extends into the monitoring storage tank (21) and contacts the coolant in the monitoring storage tank (21).

2. The secondary-side circulation network according to claim 1, characterized in that, The pure water treatment system (33) includes: The secondary raw water pipeline (331) is connected at one end to the water storage tank (32); The water purification device has its inlet connected to the other end of the secondary raw water pipeline (331); The water outlet pipe (333) is connected at one end to the outlet of the water purification device and at the other end to the water storage tank (32); a first power pump (334) is provided on the water outlet pipe (333). The water storage tank (32) is equipped with a first pressure sensor (321). The first pressure sensor (321) and the first power pump (334) are both connected to the control system. The control system is used to receive the pressure data transmitted by the first pressure sensor (321) and control the start and stop of the first power pump (334) according to the pressure data.

3. The secondary side circulation network according to claim 2, characterized in that, The pure water treatment system (33) also includes an external water source pipeline (335), one end of which is connected to the inlet of the water purification device, and the other end is adapted to be connected to an external water source; a fourth shut-off valve (336) is provided on the external water source pipeline (335). The water purification device is equipped with a raw water tank (33201) at its inlet, and a first liquid level sensor (33202) is provided on the raw water tank (33201). The first liquid level sensor (33202) and the fourth on / off valve (336) are both connected to the control system. The control system is used to receive the liquid level data transmitted by the first liquid level sensor (33202) and control the opening and closing of the external water source pipeline (335) by controlling the fourth on / off valve (336) according to the liquid level data. And / or, the water storage tank (32) is provided with a second liquid level sensor (322), and the secondary raw water pipeline (331) is provided with a second power pump (337); the second liquid level sensor (322) and the second power pump (337) are both connected to the control system, and the control system is used to receive the liquid level data transmitted by the second liquid level sensor (322) and control the start and stop of the second power pump (337) according to the liquid level data; And / or, the water storage tank (32) is also provided with a breather valve (323), which is located above the water storage tank (32); And / or, the first pressure sensor (321) is connected to the water storage tank (32) through a first connecting pipe, and a first switching valve (4111) is provided on the first connecting pipe. And / or, a one-way valve (338) is provided on the water outlet pipe (333).

4. The secondary-side circulation network according to any one of claims 1 to 3, characterized in that, The circulating pipeline structure (1) includes a secondary water supply pipeline (13), which includes a main water supply pipeline (131) and multiple water supply branches (132). The main water supply pipeline (131) is adapted to be connected to the cooling capacity distribution unit (5). One end of the water supply branch (132) is connected to the main water supply pipeline (131), and the other end is adapted to be connected to the liquid cooling cabinet (6). The water quality monitoring system (2) is connected to the main water supply pipeline (131).

5. The secondary-side circulation network according to claim 4, characterized in that, The water quality monitoring system (2) also includes a third pipeline structure, which includes a third branch (231), a first manual valve (232), and a second manual valve (233); the third branch (231) is connected in parallel with the main water supply pipeline (131); the first manual valve (232), the monitoring storage tank (21), and the second manual valve (233) are sequentially arranged on the third branch (231); And / or, the monitoring storage tank (21) includes a baffle (211) located between the inlet and outlet of the monitoring storage tank (21) and spaced apart from the top of the monitoring storage tank (21); the monitoring component is located on the side of the baffle (211) near the inlet of the monitoring storage tank (21), and the distance between the monitoring probe of the monitoring component and the bottom of the monitoring storage tank (21) is less than the height of the baffle (211); And / or, the monitoring reservoir (21) includes an exhaust valve (212) disposed on the top of the monitoring reservoir (21); And / or, the monitoring reservoir (21) includes a sampling valve (213) disposed below the monitoring reservoir (21).

6. The secondary-side circulation network according to any one of claims 1 to 3 or 5, characterized in that, It also includes a filter structure, the filter structure comprising: The filter status monitoring unit includes a second pressure sensor (411) and a third pressure sensor (412), which are arranged sequentially and at intervals on the circulation pipeline structure (1). The filter pipe (42) is located between the second pressure sensor (411) and the third pressure sensor (412) and is connected to the circulation pipe structure (1); and the filter pipe (42) is provided with a coarse filter (43). The second pressure sensor (411) and the third pressure sensor (412) are both connected to the control system and transmit inlet pressure and outlet pressure to the control system. The control system determines the filter element status of the coarse filter (43) by the difference between the inlet pressure and the outlet pressure.

7. The secondary circulation network according to claim 6, characterized in that, The filter pipeline (42) is provided with at least two lines, and the at least two filter pipelines (42) are arranged in parallel; the filter pipeline (42) is also provided with a third manual valve (44) and a fourth manual valve (45), and the coarse filter (43) is located between the third manual valve (44) and the fourth manual valve (45); And / or, the filter pipeline (42) is also provided with a needle valve (46), which is arranged adjacent to the coarse filter (43); And / or, the second pressure sensor (411) is connected to the circulation pipeline structure (1) through a second connecting pipe, and a second switching valve is provided on the second connecting pipe; And / or, the third pressure sensor (412) is connected to the circulation pipeline structure (1) through the second connecting pipe, and the third connecting pipe is provided with a third switching valve.

8. A data center liquid cooling system, characterized in that, include: Cooling distribution unit (5); The secondary side circulation network according to any one of claims 1 to 7 is circulatedly connected to the cooling capacity distribution unit (5) and the liquid cooling cabinet (6). The primary side circulation network is connected to the cooling capacity distribution unit (5) and the external cooling equipment.

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