Data center liquid cooling secondary side water quality steady state system and control method thereof

Abstract

The invention discloses a data center liquid cooling secondary side water quality steady-state system and a control method thereof, the system comprises a first water quality stabilizing device, a second water quality stabilizing device, a mode switching valve assembly, a water quality monitoring device and a control unit, the water quality monitoring device is used for collecting water quality data such as pH value, conductivity, COD, turbidity and total phosphorus in a water supply and return looped network; the control unit switches three working modes of the system by controlling the opening and closing states of the mode switching valve assembly according to the water quality data: a single working mode: water flow only passes through one water quality stabilizing device; in the series working mode, water flow sequentially passes through the two water quality stabilizing devices; and in a parallel working mode, the water flow simultaneously passes through the two water quality stabilizing devices in parallel. The system can ensure the stability of water quality, and can flexibly adapt to the dynamic change of water quality requirements caused by the increase and decrease of the number of data center cabinets.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling technology for data centers, and more specifically to a data center liquid cooling secondary side water quality steady-state system and its control method. Background Technology

[0002] With the continuous increase in AI computing power and heat dissipation requirements, liquid cooling systems are gradually becoming one of the main methods for chip cooling in the future, and a necessary choice for data center cooling systems.

[0003] Currently, liquid cooling technology for cold plates has become the mainstream technology in the industry due to its relatively lower overall investment cost and similar maintenance methods to traditional air-cooled cabinets. The secondary side system of liquid cooling for cold plates primarily uses deionized water and aqueous solutions of ethylene glycol and propylene glycol. Ethylene glycol and propylene glycol solutions have high initial investment costs and are prone to corrosion problems later on. While deionized water has moderate initial costs, its subsequent scaling and insufficient bacterial count significantly increase the manpower and material resources required for the later maintenance of the liquid cooling system.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] Purpose of the invention: The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a data center liquid cooling secondary side water quality steady-state system and its control method, which can automatically adapt to fluctuations in water quality treatment demand caused by changes in the number of servers, ensuring that the water quality of the liquid cooling secondary side is always within a stable water quality standard range, thereby ensuring safe operation of servers, high and stable liquid cooling efficiency, reliable system operation, and low costs for spare parts, chemicals, energy consumption, and manual maintenance.

[0006] To address the aforementioned technical problems, the first aspect of this invention discloses a data center liquid-cooled secondary-side water quality steady-state system, the system comprising:

[0007] First water quality stabilization device and second water quality stabilization device;

[0008] A mode switching valve assembly is installed between the first water quality stabilization device, the second water quality stabilization device, the water supply loop network, and the water return loop network;

[0009] A water quality monitoring device is used to collect water quality data within the water supply network; the water quality data includes pH value, conductivity value, COD value, turbidity data, and total phosphorus value;

[0010] The control unit is connected to the first water quality stabilizing device, the second water quality stabilizing device, the water quality monitoring device, and the mode switching valve assembly, respectively. The control unit is configured to control the opening and closing state of the mode switching valve assembly based on at least one of the water quality data, switching the system between the following operating modes to stabilize the water quality:

[0011] Single-unit operating mode: The water flow of the water supply network returns to the return water network only after passing through the first water quality stabilization device or the second water quality stabilization device;

[0012] Series operation mode: The water flow of the water supply ring network passes through the first water quality stabilization device and the second water quality stabilization device in sequence and then returns to the return water ring network.

[0013] And parallel operation mode: the water flow of the water supply ring network simultaneously and independently passes through the first water quality stabilization device and the second water quality stabilization device before returning to the return water ring network.

[0014] In one embodiment, the mode switching valve assembly includes a first electrically operated two-way valve, a first electrically operated three-way valve, a second electrically operated three-way valve, and a connecting pipeline; the inlet of the first water quality stabilization device is connected to the outlet of the first electrically operated two-way valve, the inlet of the first electrically operated two-way valve is connected to the water supply network, the outlet of the first water quality stabilization device is connected to the inlet of the first electrically operated three-way valve, and the first outlet of the first electrically operated three-way valve is connected to the return water network; the inlet of the second water quality stabilization device is connected to the outlet of the second electrically operated three-way valve, the first inlet of the second electrically operated three-way valve is connected to the water supply network, the second inlet of the second electrically operated three-way valve is connected to the second outlet of the first electrically operated three-way valve through the connecting pipeline, and the outlet of the second water quality stabilization device is connected to the return water network.

[0015] In one embodiment, the mode switching valve assembly further includes a first electric bypass valve and a second electric bypass valve. One end of the first electric bypass valve is connected to the first outlet of the first electric three-way valve, and the other end of the first electric bypass valve is connected to the inlet of the first electric two-way valve. One end of the second electric bypass valve is connected to the first inlet of the second electric three-way valve, and the other end of the second electric bypass valve is connected to the outlet of the second water quality stabilization device.

[0016] In one embodiment, the inlet of the first electric two-way valve is connected to the water supply network via a first inlet connecting pipe; the first outlet of the first electric three-way valve is connected to the return water network via a first return water connecting pipe; the first inlet of the second electric three-way valve is connected to the water supply network via a second inlet connecting pipe; and the outlet of the second water quality stabilization device is connected to the return water network via a second return water connecting pipe.

[0017] In one embodiment, the water quality monitoring device includes a pH meter, a conductivity meter, a COD meter, a turbidity meter, and a total phosphorus (TP) meter. The pH meter, the conductivity meter, the COD meter, the turbidity meter, and the total phosphorus (TP) meter are respectively connected to the water supply network and electrically connected to the control unit.

[0018] In one embodiment, the system includes:

[0019] The liquid-cooled CDU has its inlet connected to the water supply ring network and its outlet connected to the return water ring network.

[0020] And a cabinet, wherein there is one or more cabinets; the water inlet of each cabinet is connected to the water supply ring network, and the water outlet is connected to the return water ring network.

[0021] A second aspect of the present invention discloses a control method applied to the aforementioned data center liquid-cooled secondary side water quality steady-state system; the method includes the following steps:

[0022] The system acquires real-time water quality data from the water supply network collected by the water quality monitoring device; the water quality data includes pH value, conductivity value, COD value, turbidity data, and total phosphorus value.

[0023] Determine whether each of the water quality data exceeds its respective first preset threshold;

[0024] If all the water quality data do not exceed their respective first preset thresholds, then the first electric two-way valve and the first water quality stabilizing device are opened, and the first electric bypass valve, the second water quality stabilizing device, the second electric three-way valve, and the second electric bypass valve are closed; the first electric three-way valve is controlled to connect the water supply loop network, the first inlet of the first electric three-way valve, the outlet of the first electric three-way valve, and the inlet of the first water quality stabilizing device in sequence, and the water flow of the water supply loop network flows back to the return water loop network through the first electric three-way valve and the first water quality stabilizing device in sequence; at this time, the system is in single-unit working mode, and the second water quality stabilizing device is a backup cabinet;

[0025] When the system is in single-unit working mode, it is determined whether each of the water quality data exceeds its second preset threshold.

[0026] If at least one of the water quality data exceeds its second preset threshold, the second water quality stabilization device is further activated; the second electric three-way valve is controlled to connect the water supply network, the first inlet of the second electric three-way valve, the outlet of the second electric three-way valve, and the inlet of the second water quality stabilization device in sequence. At this time, the system enters the parallel operation mode; if none of the water quality data exceeds their respective second preset thresholds, the process returns to the previous step.

[0027] When the system is in parallel operation mode, determine whether the current value of total phosphorus exceeds its second preset threshold.

[0028] If the current value of total phosphorus exceeds its second preset threshold, the first electric three-way valve and the second electric three-way valve are controlled so that the second inlet of the second electric three-way valve, the connecting pipe and the second outlet of the first electric three-way valve are connected in sequence. The water flowing out of the outlet of the first water quality stabilization device flows into the inlet of the second water quality stabilization device through the first electric three-way valve, the connecting pipe and the second electric three-way valve in sequence. At this time, the system is in series working mode and has a higher treatment capacity for bacterial colonies.

[0029] In one embodiment, the system further includes a temperature sensor, a first electric bypass valve, and a second electric bypass valve. The temperature sensor is disposed on the return water loop network and is used to collect the water temperature in the return water loop network. One end of the first electric bypass valve is connected to the first outlet of the first electric three-way valve, and the other end of the first electric bypass valve is connected to the inlet of the first electric two-way valve. One end of the second electric bypass valve is connected to the first inlet of the second electric three-way valve, and the other end of the second electric bypass valve is connected to the outlet of the second water quality stabilization device. The temperature sensor, the first electric bypass valve, and the second electric bypass valve are electrically connected to the control unit.

[0030] The method also includes:

[0031] The real-time water temperature in the return water loop network is acquired by the temperature sensor.

[0032] Once the real-time water temperature exceeds the water temperature threshold, the first electric two-way valve, the first electric three-way valve, the second electric three-way valve, the first water quality stabilizing device, and the second water quality stabilizing device are closed, and the first electric bypass valve and the second electric bypass valve are opened.

[0033] In one embodiment, the first water quality stabilization device also has an alarm function. When the system is in single-unit working mode, if the first water quality stabilization device malfunctions and alarms, the first electric two-way valve, the first water quality stabilization device, the first electric three-way valve, and the second electric bypass valve are closed, and the first electric bypass valve and the second water quality stabilization device are opened. The second electric three-way valve is controlled to connect the water supply loop network, the first inlet of the second electric three-way valve, the outlet of the second electric three-way valve, and the inlet of the second water quality stabilization device in sequence. The water flow of the water supply loop network flows back to the return water loop network after passing through the second electric three-way valve and the second water quality stabilization device in sequence.

[0034] In one embodiment, the first preset threshold refers to 90% of the standard value of the corresponding water quality data; the second preset threshold refers to 100% of the standard value of the corresponding water quality data; and the water temperature threshold is 60°C.

[0035] Beneficial effects:

[0036] 1) The system of this invention can solve the problem of safety risks caused by the inability to quickly recover from fluctuations in the secondary side water quality of data center liquid cooling systems. Specifically, currently, the water quality indicators of data center liquid cooling systems cannot achieve long-term stability. As the operating time progresses, core parameters such as the concentration of metal ions, total hardness, conductivity, pH value, and bacterial colonies in the system water will increase and change to a certain extent. With continuous business updates and the addition of more servers, the concentration of metal ions in the system will fluctuate significantly. Unstable water quality will affect the corrosivity of the system, causing corrosion to system pipes and server heat exchange plates. Scale will adhere to the heat exchange plates and pipes, affecting chip heat dissipation. The increase in the number of bacterial colonies will also increase system resistance, affecting chip heat exchange. Therefore, water quality stability plays a crucial role in the safe operation and energy saving of the system. This invention controls the water quality data system to switch between three different operating modes: single unit, series, and parallel. This allows the system's water quality processing capacity to adapt to fluctuations or exceedances in the secondary side water quality of data center liquid cooling systems caused by the expansion or replacement of online business servers, ensuring that the system always remains within a stable water quality standard range.

[0037] 2) The system of this invention can solve the problems of increased costs and high maintenance difficulty caused by the overly specialized nature of conventional water treatment for liquid cooling of cold plates. Specifically, currently, when the water quality on the secondary side of the liquid cooling system in the operating room exceeds the standard, it is only possible to seek professional water treatment companies and their technicians to conduct regular on-site testing and add relevant agents to the liquid cooling system to adjust or balance the deviation in water quality. This results in a large consumption of manpower and resources and is also not conducive to emergency handling by on-site maintenance personnel in the event of significant fluctuations in water quality.

[0038] 3) The system of the present invention can solve the problem that when the quality of the liquid cooling water in the cold plate is seriously out of standard, it is necessary to replace the water to ensure the stability of the water quality. However, online water replacement will inevitably affect the safe and stable operation of the server in the data center intelligent computing center and bring serious security risks to the online operation business.

[0039] 4) The system of this invention can solve the risk of damage or short circuits to electrical equipment and IT server equipment caused by leakage or spraying of traditional deionized water for cold plate liquid cooling. The water treated by the water quality stabilization device of this invention has a conductivity of less than 1 μS / cm and is an insulating material. Even in the event of leakage or spraying, it will not cause any short circuits to electrical equipment, effectively protecting IT and electrical equipment.

[0040] 5) The system of the present invention collects water quality data in the water supply network through a water quality monitoring device, which solves the problem that the core water quality indicators of the current secondary side system cannot be visualized or monitored in real time, resulting in delays in operation, maintenance and processing. Attached Figure Description

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0042] Figure 1 A schematic diagram of a data center liquid-cooled secondary side water quality steady-state system provided in an embodiment of the present invention;

[0043] Figure 2 A flowchart of a control method provided in one embodiment of the present invention.

[0044] The accompanying figure labels are explained as follows:

[0045] 1. Liquid-cooled CDU; 2. First water quality stabilization device; 3. Second water quality stabilization device; 4. Cabinet; 5. Water supply loop network; 6. Water return loop network; 7. pH meter; 8. Conductivity meter; 9. COD meter; 10. Turbidity monitor; 11. Total phosphorus (TP) meter; 12. Temperature sensor; 21. First electric two-way valve; 22. First electric three-way valve; 23. First electric bypass valve; 24. First inlet pipe; 25. First inlet connection pipe; 26. First outlet pipe; 27. Connecting pipe; 28. First return connection pipe; 31. Second electric three-way valve; 32. Second electric bypass valve; 33. Second inlet pipe; 34. Second return connection pipe; 35. Second inlet connection pipe; 36. Second bypass pipe. Detailed Implementation

[0046] Example 1

[0047] Currently, the quality indicators of liquid cooling water in data centers cannot achieve long-term stability. As the system operates over time, key water quality parameters such as metal ion concentration, total hardness, conductivity, pH value, and bacterial colonies will all increase or fluctuate to varying degrees. Especially with continuous business expansion and the addition of more servers, the concentration of metal ions in the system may fluctuate significantly, further exacerbating water quality instability. This unstable water quality can lead to multiple risks: firstly, water quality fluctuations may increase the corrosiveness of the system, causing corrosion to secondary circulation pipes and server heat exchange plates, affecting equipment lifespan; secondly, hard components in the water may precipitate and form scale, adhering to heat exchange plates and pipes, hindering effective heat dissipation from chips; simultaneously, the number of bacterial colonies will increase system resistance, further weakening heat exchange efficiency.

[0048] Therefore, this embodiment provides a data center liquid cooling secondary side water quality stabilization system that can automatically maintain water quality stability and ensure the system operates safely and energy-efficiently.

[0049] Please see Figure 1 The data center liquid cooling secondary side water quality stabilization system provided in this embodiment includes: a water quality monitoring device connected to the water supply ring network 5 for collecting water quality data within the water supply ring network 5; the water quality data includes pH value, conductivity value, COD value, turbidity data, and total phosphorus value; a first water quality stabilization device 2 and a second water quality stabilization device 3, respectively configured to process all of the water quality data; a mode switching valve assembly disposed between the first water quality stabilization device 2, the second water quality stabilization device 3, the water supply ring network 5, and the return water ring network 6; and a control unit connected to the first water quality stabilization device 2, the second water quality stabilization device 3, the water quality monitoring device, and the mode switching valve assembly, respectively; the control unit is configured to control the opening and closing state of the mode switching valve assembly according to at least one of the water quality data, so that the system switches between the following operating modes to stabilize the water quality:

[0050] Single-unit working mode: The water flow of the water supply ring network 5 returns to the return water ring network 6 only after passing through the first water quality stabilization device 2 or the second water quality stabilization device 3;

[0051] Series operation mode: The water flow of the water supply ring network 5 passes through the first water quality stabilization device 2 and the second water quality stabilization device 3 in sequence and then returns to the return water ring network 6.

[0052] And parallel operation mode: the water flow of the water supply ring network 5 passes through the first water quality stabilization device 2 and the second water quality stabilization device 3 simultaneously and independently before returning to the return water ring network 6.

[0053] This invention allows the water quality data control system to switch between three different operating modes: single unit, series, and parallel. This enables the system to adapt its water quality processing capacity to fluctuations or exceedances in the secondary water quality of the data center's liquid cooling system caused by the expansion or replacement of online business servers, ensuring that the system always remains within a stable water quality standard range.

[0054] Specifically, the first water quality stabilization device 2 and the second water quality stabilization device 3 can be existing water treatment systems capable of processing all water quality parameters such as pH value, conductivity value, COD value, turbidity data and total phosphorus value of the water flow. Their specific structure belongs to the prior art and therefore will not be described in this application.

[0055] Specifically, in combination Figure 1 As shown, the mode switching valve assembly includes a first electric two-way valve 21, a first electric three-way valve 22, a second electric three-way valve 31, and a connecting pipe 27. The inlet of the first water quality stabilizing device 2 is connected to the outlet of the first electric two-way valve 21, the inlet of the first electric two-way valve 21 is connected to the water supply ring network 5, the outlet of the first water quality stabilizing device 2 is connected to the inlet of the first electric three-way valve 22, and the first outlet of the first electric three-way valve 22 is connected to the return water ring network 6. The inlet of the second water quality stabilizing device 3 is connected to the outlet of the second electric three-way valve 31, the first inlet of the second electric three-way valve 31 is connected to the water supply ring network 5, the second inlet of the second electric three-way valve 31 is connected to the second outlet of the first electric three-way valve 22 through the connecting pipe 27, and the outlet of the second water quality stabilizing device 3 is connected to the return water ring network 6.

[0056] In one embodiment, to prevent high-temperature water flow from damaging the two water quality stabilizers, combined with Figure 1 As shown, the mode switching valve assembly also includes a first electric bypass valve 23 and a second electric bypass valve 32. One end of the first electric bypass valve 23 is connected to the first outlet of the first electric three-way valve 22, and the other end of the first electric bypass valve 23 is connected to the inlet of the first electric two-way valve 21. One end of the second electric bypass valve 32 is connected to the first inlet of the second electric three-way valve 31, and the other end of the second electric bypass valve 32 is connected to the outlet of the second water quality stabilization device 3.

[0057] When the water temperature is below the water temperature threshold, the first electric bypass valve 23 and the second electric bypass valve 32 are in the closed state; otherwise, they are in the open state to isolate the corresponding water quality stabilizer.

[0058] In one embodiment, combined with Figure 1As shown, the system also includes a first bypass pipe 29, one end of which is connected to the first outlet of the first electric three-way valve 22, and the other end of which is connected to the inlet of the first electric two-way valve 21. A first electric bypass valve 23 is disposed on the first bypass pipe 29, so that one end of the first electric bypass valve 23 is connected to the first outlet of the first electric three-way valve 22, and the other end of the first electric bypass valve 23 is connected to the inlet of the first electric two-way valve 21.

[0059] In one embodiment, combined with Figure 1 As shown, the system also includes a second bypass pipe 36. One end of the second bypass pipe 36 is connected to the first inlet of the second electric three-way valve 31, and the other end of the second bypass pipe 36 is connected to the outlet of the second water quality stabilizing device 3. The second electric bypass valve 32 is installed on the second bypass pipe 36, so that one end of the second electric bypass valve 32 is connected to the first inlet of the second electric three-way valve 31, and the other end of the second electric bypass valve 32 is connected to the outlet of the second water quality stabilizing device 3.

[0060] In one embodiment, combined with Figure 1 As shown, the inlet of the first water quality stabilizing device 2 is connected to the outlet of the first electric two-way valve 21 through the first inlet pipe 24; the inlet of the first electric two-way valve 21 is connected to the water supply network 5 through the first inlet connecting pipe 25; the outlet of the first water quality stabilizing device 2 is connected to the inlet of the first electric three-way valve 22 through the first outlet pipe 26; the first outlet of the first electric three-way valve 22 is connected to the return water network 6 through the first return water connecting pipe 28; the inlet of the second water quality stabilizing device 3 is connected to the outlet of the second electric three-way valve 31 through the second inlet pipe 33; the outlet of the second water quality stabilizing device 3 is connected to the return water network 6 through the second return water connecting pipe 34; and the first inlet of the second electric three-way valve 31 is connected to the water supply network 5 through the second inlet connecting pipe 35.

[0061] In one embodiment, combined with Figure 1 As shown, the water quality monitoring device includes a pH meter 7, a conductivity meter 8, a COD meter 9, a turbidity meter 10, and a total phosphorus (TP) meter 11. The pH meter 7, conductivity meter 8, COD meter 9, turbidity meter 10, and total phosphorus (TP) meter 11 are respectively connected to the water supply loop network 5 and electrically connected to the control unit.

[0062] In one embodiment, combined with Figure 1As shown, the system includes a liquid-cooled CDU1, with one or more CDUs. The inlet of each CDU1 is connected to the water supply ring network 5, and the outlet is connected to the return water ring network 6. It also includes a server rack 4, with one or more racks. The inlet of each server rack 4 is connected to the water supply ring network 5, and the outlet is connected to the return water ring network 6. Server cooling plates are installed inside the server racks 4.

[0063] The low-temperature water from the water supply ring network 5 flows out from the outlet of the liquid-cooled CDU1 and enters the inlet of each rack 4. After exchanging heat with the server cold plate in the rack, it generates a high-temperature water flow. After passing through the return water ring network, the high-temperature water flows into the inlet of the liquid-cooled CDU1 and completes heat exchange with the primary side cold source through the plate heat exchanger inside the liquid-cooled CDU1, forming a heat exchange cycle.

[0064] Combination Figure 2 As shown, the control method for the above-described system provided in this embodiment is used to control the above-described system and includes the following steps:

[0065] S101. Real-time acquisition of water quality data within the water supply loop network 5 collected by the water quality monitoring device; the water quality data includes pH value, conductivity value, COD value, turbidity data, and total phosphorus value; specifically, the corresponding water quality data are collected through pH meter 7, conductivity meter 8, COD meter 9, turbidity meter 10, and TP total phosphorus meter 11:

[0066] S102. Determine whether each water quality data exceeds its respective first preset threshold.

[0067] S103. If all water quality data do not exceed their respective first preset thresholds, then open the first electric two-way valve 21 and the first water quality stabilizing device 2, and close the first electric bypass valve 23, the second water quality stabilizing device 3, the second electric three-way valve 31, and the second electric bypass valve 32; control the first electric three-way valve 22 to connect the water supply network 5, the first inlet of the first electric three-way valve 22, the outlet of the first electric three-way valve 22, and the inlet of the first water quality stabilizing device 2 in sequence, and the water flow of the water supply network 5 flows back to the return water network 6 through the first electric three-way valve 22 and the first water quality stabilizing device 2 in sequence; at this time, the system is in single-unit working mode, and the second water quality stabilizing device 3 is a backup cabinet;

[0068] S104. When the system is in single-unit working mode, determine whether each water quality data exceeds its second preset threshold.

[0069] S105. If at least one of the water quality data exceeds its second preset threshold, the second water quality stabilization device 3 is further activated; the second electric three-way valve 31 is controlled to connect the water supply ring network 5, the first inlet of the second electric three-way valve 31, the outlet of the second electric three-way valve 31, and the inlet of the second water quality stabilization device 3 in sequence. At this time, the system enters the parallel operation mode. The valves not mentioned and the first water quality stabilization device 2 are in the same state as in the previous step.

[0070] A portion of the water flow in the water supply ring network 5 flows back to the return water ring network 6 through the first electric two-way valve 21, the first water quality stabilization device 2, and the first electric three-way valve 22 in sequence. At the same time, a portion of the water flow in the water supply ring network 5 flows back to the return water ring network 6 through the second electric three-way valve 31 and the second water quality stabilization device 3 in sequence.

[0071] If all water quality data do not exceed their respective second preset thresholds, then return to S103;

[0072] S106. When the system is in parallel operation mode, determine whether the current value of total phosphorus exceeds its second preset threshold.

[0073] S107. If the current value of total phosphorus exceeds its second preset threshold, control the first electric three-way valve 22 and the second electric three-way valve 31 so that the second inlet of the second electric three-way valve 31, the connecting pipe 27 and the second outlet of the first electric three-way valve 22 are connected in sequence. The water flowing out of the outlet of the first water quality stabilizing device 2 flows into the inlet of the second water quality stabilizing device 3 through the first electric three-way valve 22, the connecting pipe 27 and the second electric three-way valve 31 in sequence. At this time, the system is in series working mode and has a higher treatment capacity for bacterial colonies. The valve status not mentioned is the same as in the previous step.

[0074] If the current value of total phosphorus does not exceed its second preset threshold, then return to S105.

[0075] Furthermore, to protect the two water quality stabilization devices, the system also includes a temperature sensor 12, a first electric bypass valve 23, and a second electric bypass valve 32. The temperature sensor 12 is installed on the return water loop 6 to collect the water temperature in the return water loop 6. One end of the first electric bypass valve 23 is connected to the first outlet of the first electric three-way valve 22, and the other end of the first electric bypass valve 23 is connected to the inlet of the first electric two-way valve 21. One end of the second electric bypass valve 32 is connected to the first inlet of the second electric three-way valve 31, and the other end of the second electric bypass valve 32 is connected to the outlet of the second water quality stabilization device 3. The temperature sensor 12, the first electric bypass valve 23, and the second electric bypass valve 32 are electrically connected to the control unit.

[0076] The method also includes:

[0077] The real-time water temperature in the return water loop 6 is acquired by the temperature sensor 12.

[0078] Once the real-time water temperature exceeds the water temperature threshold, the first electric two-way valve 21, the first electric three-way valve 22, the second electric three-way valve 31, the first water quality stabilizing device 2 and the second water quality stabilizing device 3 are closed, and the first electric bypass valve 23 and the second electric bypass valve 32 are opened.

[0079] At this time, the high-temperature water flow does not flow through the first water quality stabilizing device 2 and the second water quality stabilizing device 3, thus protecting the first water quality stabilizing device 2 and the second water quality stabilizing device 3.

[0080] Furthermore, the first water quality stabilizing device 2 of the system has an alarm function. When the system is in single-unit working mode, if the first water quality stabilizing device 2 malfunctions and alarms, the first electric two-way valve 21, the first water quality stabilizing device 2, the first electric three-way valve 22, and the second electric bypass valve 32 are closed, and the first electric bypass valve 23 and the second water quality stabilizing device 3 are opened. The second electric three-way valve 31 is controlled to connect the water supply network 5, the first inlet of the second electric three-way valve 31, the outlet of the second electric three-way valve 31, and the inlet of the second water quality stabilizing device 3 in sequence. The water flow in the water supply network 5 flows back to the return water network 6 after passing through the second electric three-way valve 31 and the second water quality stabilizing device 3 in sequence.

[0081] In one embodiment, the first preset threshold refers to 90% of the standard value of the corresponding water quality data. The second preset threshold refers to 100% of the standard value of the corresponding water quality data; the water temperature threshold is 60℃. The standard values ​​for each water quality data point are provided in relevant industry standards.

[0082] This invention provides a concept and method for a data center liquid-cooled secondary side water quality steady-state system and its control method. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A data center liquid-cooled secondary-side water quality steady-state system, characterized in that, include: First water quality stabilization device (2) and second water quality stabilization device (3); The mode switching valve assembly is installed between the first water quality stabilization device (2), the second water quality stabilization device (3), the water supply ring network (5), and the return water ring network (6); A water quality monitoring device is used to collect water quality data within the water supply network (5); the water quality data includes pH value, conductivity value, COD value, turbidity data and total phosphorus value; The control unit is connected to the first water quality stabilization device (2), the second water quality stabilization device (3), the water quality monitoring device, and the mode switching valve assembly, respectively. The control unit is configured to control the opening and closing state of the mode switching valve assembly according to at least one of the water quality data, switching the system between the following operating modes to stabilize the water quality: Single unit working mode: The water flow of the water supply ring network (5) returns to the return water ring network (6) only after passing through the first water quality stabilization device (2) or the second water quality stabilization device (3). Series operation mode: The water flow of the water supply ring network (5) passes through the first water quality stabilization device (2) and the second water quality stabilization device (3) in sequence and then returns to the return water ring network (6). And parallel working mode: the water flow of the water supply ring network (5) passes through the first water quality stabilization device (2) and the second water quality stabilization device (3) simultaneously and independently before returning to the return water ring network (6).

2. The data center liquid-cooled secondary-side water quality steady-state system according to claim 1, characterized in that, The mode switching valve assembly includes a first electric two-way valve (21), a first electric three-way valve (22), a second electric three-way valve (31), and a connecting pipe (27); the inlet of the first water quality stabilizing device (2) is connected to the outlet of the first electric two-way valve (21), the inlet of the first electric two-way valve (21) is connected to the water supply ring network (5), the outlet of the first water quality stabilizing device (2) is connected to the inlet of the first electric three-way valve (22), and the first electric three-way valve (22)... The first outlet of the second water quality stabilizing device (3) is connected to the return water ring network (6); the inlet of the second water quality stabilizing device (3) is connected to the outlet of the second electric three-way valve (31); the first inlet of the second electric three-way valve (31) is connected to the water supply ring network (5); the second inlet of the second electric three-way valve (31) is connected to the second outlet of the first electric three-way valve (22) through the connecting pipe (27); and the outlet of the second water quality stabilizing device (3) is connected to the return water ring network (6).

3. The data center liquid-cooled secondary-side water quality steady-state system according to claim 2, characterized in that, The mode switching valve assembly also includes a first electric bypass valve (23) and a second electric bypass valve (32). One end of the first electric bypass valve (23) is connected to the first outlet of the first electric three-way valve (22), and the other end of the first electric bypass valve (23) is connected to the inlet of the first electric two-way valve (21). One end of the second electric bypass valve (32) is connected to the first inlet of the second electric three-way valve (31), and the other end of the second electric bypass valve (32) is connected to the outlet of the second water quality stabilization device (3).

4. The data center liquid-cooled secondary-side water quality steady-state system according to claim 2, characterized in that, The inlet of the first electric two-way valve (21) is connected to the water supply network (5) through the first water inlet connecting pipe (25); The first outlet of the first electric three-way valve (22) is connected to the return water ring network (6) through the first return water connection pipe (28); The first inlet of the second electric three-way valve (31) is connected to the water supply ring network (5) through the second inlet connecting pipe (35); The outlet of the second water quality stabilization device (3) is connected to the return water ring network (6) through the second return water connection pipe (34).

5. The data center liquid-cooled secondary-side water quality steady-state system according to claim 1, characterized in that, The water quality monitoring device includes a pH meter (7), a conductivity meter (8), a COD meter (9), a turbidity meter (10), and a total phosphorus (TP) meter (11). The pH meter (7), the conductivity meter (8), the COD meter (9), the turbidity meter (10), and the total phosphorus (TP) meter (11) are respectively connected to the water supply network (5) and electrically connected to the control unit.

6. The data center liquid-cooled secondary-side water quality steady-state system according to claim 1, characterized in that, include: The liquid-cooled CDU (1) has its inlet end connected to the water supply ring network (5) and its outlet end connected to the return water ring network (6). And a cabinet (4), wherein there is one or more cabinets (4); the water inlet of each cabinet (4) is connected to the water supply ring network (5), and the water outlet is connected to the return water ring network (6).

7. A control method, characterized in that, Applied to the data center liquid-cooled secondary side water quality steady-state system as described in claim 2; the method includes the following steps: Real-time acquisition of water quality data within the water supply network (5) collected by the water quality monitoring device; the water quality data includes pH value, conductivity value, COD value, turbidity data and total phosphorus value; Determine whether each of the water quality data exceeds its respective first preset threshold; If all the water quality data do not exceed their respective first preset thresholds, then the first electric two-way valve (21) and the first water quality stabilizing device (2) are opened, and the first electric bypass valve (23), the second water quality stabilizing device (3), the second electric three-way valve (31) and the second electric bypass valve (32) are closed; the first electric three-way valve (22) is controlled to connect the water supply network (5), the first inlet of the first electric three-way valve (22), the outlet of the first electric three-way valve (22) and the inlet of the first water quality stabilizing device (2) in sequence, and the water flow of the water supply network (5) flows back to the return water network (6) through the first electric three-way valve (22) and the first water quality stabilizing device (2) in sequence; at this time, the system is in single-unit working mode, and the second water quality stabilizing device (3) is a standby cabinet; When the system is in single-unit working mode, it is determined whether each of the water quality data exceeds its second preset threshold. If at least one of the water quality data exceeds its second preset threshold, the second water quality stabilization device (3) is further activated; the second electric three-way valve (31) is controlled to connect the water supply network (5), the first inlet of the second electric three-way valve (31), the outlet of the second electric three-way valve (31), and the inlet of the second water quality stabilization device (3) in sequence. At this time, the system enters the parallel operation mode; if none of the water quality data exceeds their respective second preset thresholds, the process returns to the previous step. When the system is in parallel operation mode, determine whether the current value of total phosphorus exceeds its second preset threshold. If the current value of total phosphorus exceeds its second preset threshold, the first electric three-way valve (22) and the second electric three-way valve (31) are controlled so that the second inlet of the second electric three-way valve (31), the connecting pipe (27) and the second outlet of the first electric three-way valve (22) are connected in sequence. The water flowing out of the outlet of the first water quality stabilizing device (2) flows into the inlet of the second water quality stabilizing device (3) through the first electric three-way valve (22), the connecting pipe (27) and the second electric three-way valve (31) in sequence. At this time, the system is in series working mode and has a higher treatment capacity for bacterial colonies.

8. The control method according to claim 7, characterized in that, The system also includes a temperature sensor (12), a first electric bypass valve (23), and a second electric bypass valve (32). The temperature sensor (12) is installed on the return water loop (6) to collect the water temperature in the return water loop (6). One end of the first electric bypass valve (23) is connected to the first outlet of the first electric three-way valve (22), and the other end of the first electric bypass valve (23) is connected to the inlet of the first electric two-way valve (21). One end of the second electric bypass valve (32) is connected to the first inlet of the second electric three-way valve (31), and the other end of the second electric bypass valve (32) is connected to the outlet of the second water quality stabilization device (3). The temperature sensor (12), the first electric bypass valve (23), and the second electric bypass valve (32) are electrically connected to the control unit. The method also includes: The real-time water temperature in the return water loop (6) collected by the temperature sensor (12) is obtained; Once the real-time water temperature exceeds the water temperature threshold, the first electric two-way valve (21), the first electric three-way valve (22), the second electric three-way valve (31), the first water quality stabilizing device (2) and the second water quality stabilizing device (3) are closed, and the first electric bypass valve (23) and the second electric bypass valve (32) are opened.

9. The control method according to claim 8, characterized in that, The first water quality stabilization device (2) also has an alarm function. When the system is in single-unit working mode, if the first water quality stabilization device (2) has a fault alarm, the first electric two-way valve (21), the first water quality stabilization device (2), the first electric three-way valve (22) and the second electric bypass valve (32) will be closed, and the first electric bypass valve (23) and the second water quality stabilization device (3) will be opened. The second electric three-way valve (31) will be controlled so that the first inlet of the water supply network (5), the outlet of the second electric three-way valve (31) and the inlet of the second water quality stabilization device (3) will be connected in sequence. The water flow of the water supply network (5) will flow back to the return water network (6) after passing through the second electric three-way valve (31) and the second water quality stabilization device (3) in sequence.

10. The control method according to claim 9, characterized in that, The first preset threshold refers to 90% of the standard value of the corresponding water quality data; the second preset threshold refers to 100% of the standard value of the corresponding water quality data. The water temperature threshold is 60℃.

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