1350kw data center liquid cooling CDU temperature control unit and control method thereof

Abstract

This invention discloses a 1350KW data center liquid-cooled CDU temperature control unit, comprising a main body with multiple casters at its bottom, a drain pipe at the right end of the main body, a housing fixedly mounted at the left end of the main body, a water inlet pipe at the left end of the housing, a guide pipe slidably fitted inside the housing and fixedly connected to the main body, two symmetrically distributed rotating shafts rotatably fitted inside the housing, a motor fixedly mounted at the left end of the housing, the motor's output end rotatably connected to the housing, and the motor's output end fixedly connected to one of the rotating shafts, with a rotating ring fixedly connected to the outer side of the rotating shaft. This invention relates to a 1350KW data center liquid-cooled CDU temperature control unit, featuring high-power cooling capacity, dual-path redundancy protection, multi-mode control, precise temperature control, intelligent load adaptation, and anti-interference and monitoring alarm functions.

Description

Technical Field

[0001] This invention belongs to the field of temperature control unit technology, specifically a 1350KW data center liquid-cooled CDU temperature control unit and its control method. Background Technology

[0002] Current liquid-cooled CDU temperature control technology for high-power servers in data centers suffers from several pain points: First, the circulating power system often uses a single or dual pump in fixed operation, which cannot be dynamically adjusted according to the load, resulting in significant energy waste during low-load periods, and single-pump failures can easily cause cooling interruptions; second, the heat exchange system is mostly a single-path design, lacking redundancy and backup, and the heat exchange efficiency is limited by the flow channel design and media compatibility, making it difficult to meet the requirements of 1350KW. The problems with traditional liquid-cooled CDU temperature control units are: 1) high-power cooling requirements; 2) lagging pressure regulation in the static water supply system, which cannot adapt to pressure fluctuations under dynamic loads, leading to excessive or insufficient pressure; 3) limited control system functionality, mostly local manual control with weak remote linkage capabilities and fixed control strategies, unable to self-optimize based on operating conditions; 4) limited monitoring dimensions, focusing only on core parameters such as temperature and pressure, lacking full-process parameter acquisition and fault tracing capabilities, and unclear early warning levels; 5) insufficient electromagnetic interference resistance design, prone to signal distortion and equipment malfunctions in the strong electromagnetic environment of data centers; 6) lack of targeted energy-saving optimization solutions, unable to achieve precise matching between cooling capacity and server load, making energy consumption management difficult; and 7) insufficient structural protection performance, with corrosion resistance and maintenance convenience failing to meet the long-term operational needs of data centers. Therefore, a 1350KW data center liquid-cooled CDU temperature control unit needs to be designed. Summary of the Invention The purpose of this invention is to provide a 1350KW data center liquid-cooled CDU temperature control unit and its control method to solve the above-mentioned problems, thus resolving the issues mentioned in the background art.

[0003] To address the above problems, the present invention provides a technical solution: A 1350KW data center liquid-cooled CDU temperature control unit includes a body with multiple casters at the bottom. A drain pipe is located at the right end of the body, and a housing is fixedly installed at the left end. A water inlet pipe is located at the left end of the housing. A guide pipe is slidably connected inside the housing and fixedly connected to the body. Two symmetrically distributed rotating shafts are rotatably connected inside the housing. A motor is fixedly installed at the left end of the housing, and its output end is rotatably connected to the housing. The motor's output end is fixedly connected to one of the rotating shafts. A rotating ring is fixedly connected to the outer side of the rotating shaft. A connecting shaft rotatably connects the two rotating rings. A fixed rod is slidably connected to the outer side of the connecting shaft. A sliding sleeve is fixedly connected to the top of the fixed rod. A connecting rod is slidably connected inside the sliding sleeve. A support frame is fixedly connected to the top of the connecting rod and slidably connected to the inner wall of the housing. A filter element is installed inside the support frame.

[0004] A control method for a 1350KW data center liquid-cooled CDU temperature control unit, the specific steps of which include: Step 1: During the operation of the machine, coolant is introduced through the water inlet pipe, and then the cooling water enters the interior of the housing. The water flows onto the surface of the filter element, which filters and purifies the water. Step 2: After the cooling water is filtered, it will flow downward through the filter element. Then the cooling water falls on the slope at the bottom of the cabinet and flows along the slope. Then the water will enter the machine through the guide pipe and finally be discharged through the drain pipe to cool the data center. Step 3: During the cooling water filtration process, the motor works simultaneously. The motor's output drives the rotating shaft to rotate. The rotating shaft drives the rotating ring to rotate, which in turn drives the connecting shaft to rotate. The connecting shaft pushes and pulls the fixed rod to move vertically. The fixed rod drives the sliding sleeve to move. The sliding sleeve can rotate along the connecting rod. At the same time, the sliding sleeve can drive the connecting rod and the support frame to move back and forth vertically, which in turn can cause the filter element to shake. This can shake out the impurities that clog the filter element and prevent the filter element from being clogged and affecting the water flow.

[0005] A 1350KW data center liquid-cooled CDU temperature control unit further includes a main circulation power module, a heat exchange core module, a fluid purification and filtration module, a pressure stabilization and water supply module, an intelligent control module, an anti-electromagnetic interference module, an exhaust pollution module, a structural protection module, an energy consumption optimization module, and a remote monitoring module. The heat exchange core module and the fluid purification and filtration module are connected; the fluid purification and filtration module and the pressure stabilization and water supply module are connected; the pressure stabilization and water supply module and the intelligent control module are connected; the intelligent control module and the anti-electromagnetic interference module are connected; the anti-electromagnetic interference module and the exhaust pollution module are connected; the exhaust pollution module and the structural protection module are connected; the structural protection module and the energy consumption optimization module are connected; and the energy consumption optimization module and the remote monitoring module are connected.

[0006] Preferably, the main circulation power module includes a pump set intelligent switching unit, a load adaptation and adjustment unit, and a pump set fault diagnosis unit. The pump set intelligent switching unit and the load adaptation and adjustment unit are connected, and the load adaptation and adjustment unit and the pump set fault diagnosis unit are connected. The intelligent pump switching unit uses three variable frequency centrifugal pumps connected in parallel, with built-in automatic switching logic for each hour. When a running pump fails or the switching time is reached, the standby pump is automatically started, and the Pac-Coo pressure transmitter is triggered to monitor pressure continuity. The load adaptation and adjustment unit, based on the secondary side water supply temperature and cooling load, links with the Siemens ST60 PLC to automatically adjust the number of pumps in operation. When the temperature is lower than the "temperature to start dual pump outlet valves", only one pump operates; when it is higher than the "temperature to start three pump outlet valves", all three pumps operate in tandem. The pump fault diagnosis unit collects pump current and temperature data in real time, and, combined with feedback from the flow transmitter, automatically identifies faults such as overcurrent and idling, generates a diagnostic report, and sends an alarm through a pop-up window on the touch screen.

[0007] Preferably, the heat exchange core module includes a dual-redundant heat exchange unit, a flow PID control unit, and a media adaptation optimization unit. The dual-redundant heat exchange unit is connected to the flow PID control unit, and the flow PID control unit is connected to the media adaptation optimization unit. The dual-redundant heat exchange unit is equipped with two plate heat exchangers, each with a heat exchange capacity of 675KW. They operate in parallel to form redundancy, supporting single-path maintenance and dual-path full-load linkage. It is compatible with a rated temperature difference of 35 / 45℃ on the primary side and 40 / 50℃ on the secondary side. The flow PID regulation unit is linked to the PLC through an electric butterfly valve. Based on the secondary side supply water temperature fed back by the temperature transmitter, it uses a PID algorithm to regulate the primary side flow rate, ensuring that the secondary side supply and return liquid temperatures are stable at 40 / 50℃. The heat exchanger plates of the media adaptation optimization unit are made of stainless steel, supporting 30% ethylene glycol aqueous solution on the primary side and 20% ethylene glycol solution on the secondary side, preventing media freezing in low-temperature environments.

[0008] Preferably, the pressure stabilizing and water replenishment module includes a dynamic pressure stabilizing unit, an intelligent water replenishment control unit, and a water replenishment fault protection unit. The dynamic pressure stabilizing unit and the intelligent water replenishment control unit are connected, and the intelligent water replenishment control unit and the water replenishment fault protection unit are connected. The dynamic pressure stabilizing unit connects three bladder buffer tanks in series, and uses a pressure transmitter to monitor the system pressure in real time. When the medium heats up and expands, the bladder is compressed to store liquid. When there is a leak, the bladder is squeezed to replenish the liquid, maintaining the system's rated pressure of 10 bar, avoiding flow instability caused by pressure fluctuations, preventing pipeline impact damage, and ensuring stable circulation. The water replenishment fault protection unit monitors the water pressure and current before the water replenishment pump when it is running. When a "water replenishment pump fault" or a low liquid level in the water replenishment tank occurs, it automatically stops water replenishment, triggers a buzzer alarm, and pushes fault information to the touch screen.

[0009] Preferably, the intelligent control module includes a multi-mode control unit, a parameter acquisition and feedback unit, and a hierarchical alarm control unit, wherein the multi-mode control unit and the parameter acquisition and feedback unit are connected, and the parameter acquisition and feedback unit and the hierarchical alarm control unit are connected. The multi-mode control unit supports three modes: "local manual," "local automatic," and "remote automatic." The local manual mode allows for independent start / stop of pump units and adjustment of electric valves. The local automatic mode responds to touchscreen start / stop commands. The remote automatic mode receives commands from the central control room via the Modbus RTU protocol and rejects local operation. The parameter acquisition and feedback unit integrates five temperature transmitters, nine pressure transmitters, and two flow transmitters, collecting eleven operating parameters in real time, and synchronizing the data to the touchscreen and the host computer. The tiered alarm control unit presets two threshold levels: "pre-alarm" and "trip alarm." For example, "high secondary side water supply temperature" triggers a pre-alarm, and "failure of all three circulating pumps" triggers a trip alarm. Alarm information supports manual reset. Strict adherence to documented alarm logic ensures early warning of potential risks and rapid shutdown protection in case of major faults, preventing server damage due to cooling failure.

[0010] Preferably, the electromagnetic interference suppression module includes a power supply filtering unit, a signal shielding unit, and a grounding protection unit, wherein the power supply filtering unit and the signal shielding unit are connected; and the signal shielding unit and the grounding protection unit are connected. The power supply filtering unit incorporates EMI filtering components in its dual power supply circuits to suppress fast transient interference and electrostatic discharge interference, ensuring clean power supply to the control circuit. It strictly adheres to electromagnetic interference resistance design standards to withstand strong electromagnetic interference in data center environments and prevent malfunctions of the PLC and transmitters. The signal shielding unit uses shielded cables for the sensor and controller connections, with power lines and signal lines laid separately to reduce crosstalk and ensure accurate analog signal transmission. The grounding protection unit uses independent grounding for the equipment casing and control circuit, with a grounding resistance ≤4Ω, to discharge electromagnetic interference energy and prevent safety risks caused by equipment leakage.

[0011] Preferably, the energy consumption optimization module includes a load dynamic matching unit and an operating parameter optimization unit, which are connected together.

[0012] The load dynamic matching unit automatically adjusts the number of pumps and the flow rate of heat exchangers based on the secondary water supply temperature and server heat load. Under low load, a single pump and a single heat exchanger operate; under full load, three pumps and two heat exchangers operate in tandem, adapting to energy regulation needs. The optimized operating parameters of the heat exchangers reduce heat exchange temperature difference losses, and the PLC adjusts the pump speed to reduce ineffective output at the rated power of 16.3KW. This improves energy efficiency and ensures minimal energy consumption at a heat exchange capacity of 1350KW, meeting the green energy-saving requirements of data centers.

[0013] A control method for a 1350KW data center liquid-cooled CDU temperature control unit, the specific steps of which include: Step S101: System power-on and basic preparation. Connect the dual 380Vac power supply, start the equipment self-test to detect power supply phase loss / phase reversal and electromagnetic interference protection, initialize the communication interface to support linkage with the local panel and central control system, load the rated parameters of 10 bar pressure, 35 / 45℃ on the primary side and 40 / 50℃ on the secondary side, and complete the preparation before startup. Step S102: Select the operating mode. Manual mode: Adapts to debugging / maintenance, and can control the start and stop of pumps and valves independently; Local automatic mode: Responds to start and stop commands from the local screen and enters unattended operation logic; Remote automatic mode: Receives commands from the central control system to prevent misoperation for 5 seconds and rejects local operation; Stop mode: Locks the equipment and retains only the alarm function. Step S103: Main circulation start-up and media filtration. Start one main circulation pump. After a 30-second delay and stabilization, the secondary side 20% ethylene glycol and the primary side 30% ethylene glycol media are filtered through corresponding precision filters and enter the circulation pipeline. Monitor the pump outlet pressure to ensure that the flow rate meets the standard. Trigger an alarm when the filter is clogged. Step S104: Pressure stabilization and water replenishment control, real-time monitoring of system pressure: when shutting down, press "static pressure" and when running, press "dynamic pressure" to automatically start the water replenishment pump to replenish water; the bladder-type buffer tank balances pressure fluctuations, and the pump stops and alarms when the water replenishment tank is low, ensuring stable system pressure; Step S105: Parameter monitoring and hierarchical alarm: Collect key parameters such as temperature, pressure, and flow rate, and synchronize them to the local screen and central control; when parameters exceed the pre-alarm threshold, such as pump failure or high temperature, a warning will be issued; when parameters exceed the trip threshold, such as all three pumps fail or the flow rate is too low, the machine will be shut down immediately for protection. Step S106: Load adaptation and pump group switching. When the temperature rises to the corresponding threshold, start the 2nd / 3rd main pump to improve cooling capacity. When the temperature drops, stop the redundant main pump to reduce energy consumption. When running single / dual pumps, if a pump reaches the set time or fails, automatically switch to the standby pump to maintain load stability. Step S107: Shutdown and maintenance preparation. After receiving the stop command, the machine will be shut down after a 30-second delay. The main pump and the water supply pump will be turned off in sequence. The exhaust valve / drain outlet will be opened to clean up the residual medium. The operating data load and alarm records will be saved, and the equipment will enter standby mode.

[0014] The beneficial effects of this invention are as follows: This invention relates to a 1350KW data center liquid-cooled CDU temperature control unit, which features high-power cooling capacity, dual-path redundancy protection, multi-mode control, precise temperature control, intelligent load adaptation, and anti-interference and monitoring alarm functions. In practical applications, compared with traditional 1350KW data center liquid-cooled CDU temperature control units, this 1350KW data center liquid-cooled CDU temperature control unit has the following beneficial effects: By designing the housing and filter element, the cooling water can be filtered and purified to avoid the problem of impurities in the cooling water clogging the cooling pipes and being difficult to clean. During the filtration process of the cooling water, the motor can drive the rotating shaft to rotate, which can drive the rotating ring to rotate, and realize the vertical reciprocating movement of the fixed rod, sliding sleeve and connecting rod, which can shake the filter element to avoid impurities clogging the filter element and affecting the water flow. By using three Wilo pump sets in the main circulation power module with 168 hours of switching and dual Fenghuang heat exchanger redundancy in the heat exchange core module, the system strictly matches the document's 1350KW rated heat exchange capacity and 24-hour operation requirements. The failure rate is lower than that of existing technologies, and the anti-electromagnetic interference module complies with the document's IEC / GB standards. The parameter acquisition accuracy meets the document's requirement of 4-20mA linear signal standard, ensuring stable output of the cooling system and adapting to the operation of high-power servers in data centers. The energy optimization module adjusts the pump set and heat exchanger according to the document load adaptation logic, and the operating energy consumption is lower than the rated 16.3KW, improving energy utilization efficiency; the remote monitoring module realizes centralized management and control through Modbus RTU, combined with intelligent alarms, reducing the workload of on-site operation and maintenance. At the same time, the structural protection module meets the document C3 anti-corrosion and maintenance space requirements, extending equipment life and reducing overall operation and maintenance costs, providing support for the green and efficient operation of the data center. Attached Figure Description For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0015] Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A three-dimensional sectional view; Figure 3 For the present invention Figure 2 Enlarged view of point A; Figure 4 This is a system schematic diagram of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the main circulation power module; Figure 6 For the present invention Figure 4 Schematic diagram of the core heat exchange module; Figure 7 For the present invention Figure 4 Schematic diagram of the pressure stabilizing and water replenishment module; Figure 8 For the present invention Figure 4 Schematic diagram of the intelligent control module; Figure 9 For the present invention Figure 4 Schematic diagram of the electromagnetic interference suppression module; Figure 10 For the present invention Figure 4 Schematic diagram of the energy consumption optimization module; Figure 11 This is a schematic diagram of the system working principle of the present invention.

[0016] In the diagram: 100. Body; 101. Casters; 102. Drain pipe; 103. Housing; 104. Inlet pipe; 105. Guide pipe; 106. Shaft; 107. Motor; 108. Rotary ring; 109. Connecting shaft; 110. Fixing rod; 111. Sliding sleeve; 112. Connecting rod; 113. Support frame; 114. Filter element; 1. Main circulation power module; 2. Heat exchange core module; 3. Fluid purification and filtration module; 4. Pressure stabilization and water replenishment module; 5. Intelligent control module; 6. Electromagnetic interference resistance module; 7. Exhaust pollution control module; 8. Structural protection module; 9. Energy consumption optimization module; 10. 11. Remote monitoring module; 12. Pump group intelligent switching unit; 13. Load adaptation and adjustment unit; 24. Pump group fault diagnosis unit; 25. Dual-path redundant heat exchange unit; 26. Flow PID adjustment unit; 27. Medium adaptation and optimization unit; 48. Dynamic pressure stabilization unit; 49. Intelligent water replenishment control unit; 40. Water replenishment fault protection unit; 51. Multi-mode control unit; 52. Parameter acquisition and feedback unit; 53. Hierarchical alarm control unit; 64. Power supply filtering unit; 65. Signal shielding unit; 66. Grounding protection unit; 97. Load dynamic matching unit; 98. Operating parameter optimization. Detailed Implementation like Figure 1-11 As shown, the specific implementation adopts the following technical solution: Example: A 1350KW data center liquid-cooled CDU temperature control unit includes a body 100. Multiple casters 101 are provided at the bottom of the body 100. A drain pipe 102 is located at the right end of the body 100. A housing 103 is fixedly installed at the left end of the body 100. A water inlet pipe 104 is located at the left end of the housing 103. A guide pipe 105 is slidably sleeved inside the housing 103 and fixedly connected to the body 100. Two symmetrically distributed rotating shafts 106 are rotatably sleeved inside the housing 103. A motor 107 is fixedly installed at the left end of the housing 103. The output end of the motor 107... The output end of the motor 107 is rotatably connected to the housing 103 and fixedly connected to one of the rotating shafts 106. A rotating ring 108 is fixedly connected to the outer side of the rotating shaft 106. A connecting shaft 109 is rotatably connected between the two rotating rings 108. A fixing rod 110 is slidably sleeved on the outer side of the connecting shaft 109. A sliding sleeve 111 is fixedly connected to the top of the fixing rod 110. A connecting rod 112 is slidably sleeved inside the sliding sleeve 111. A support frame 113 is fixedly connected to the top of the connecting rod 112. The support frame 113 is slidably connected to the inner side wall of the housing 103. A filter element 114 is provided inside the support frame 113.

[0017] A control method for a 1350KW data center liquid-cooled CDU temperature control unit, the specific steps of which include: Step 1: During the operation of the machine body 100, the coolant is input through the water inlet pipe 104, and then the cooling water enters the interior of the housing 103. The water flow will fall on the surface of the filter element 114, and the filter element 114 can filter and purify the water. Step 2: After the cooling water is filtered, it will flow downward through the filter element 114. Then the cooling water falls on the slope at the bottom of the cabinet 103. The water will flow along the slope and then enter the machine body 100 through the guide pipe 105. Finally, the water can be discharged through the drain pipe 102 to cool the data center. Step 3: During the cooling water filtration process, motor 107 operates simultaneously. The output end of motor 107 drives shaft 106 to rotate. The rotation of shaft 106 drives ring 108 to rotate, which in turn drives connecting shaft 109 to rotate. Connecting shaft 109 pushes and pulls fixed rod 110 to move vertically. Fixed rod 110 drives sliding sleeve 111 to move. Sliding sleeve 111 can rotate along connecting rod 112. At the same time, sliding sleeve 111 can drive connecting rod 112 and support frame 113 to move back and forth vertically, which in turn can drive filter element 114 to shake. This can shake out impurities that clog filter element 114, preventing filter element 114 from being clogged and affecting water flow.

[0018] A 1350KW data center liquid-cooled CDU temperature control unit further includes a main circulation power module 1, a heat exchange core module 2, a fluid purification and filtration module 3, a pressure stabilization and water supply module 4, an intelligent control module 5, an anti-electromagnetic interference module 6, an exhaust pollution module 7, a structural protection module 8, an energy consumption optimization module 9, and a remote monitoring module 10. The heat exchange core module 2 and the fluid purification and filtration module 3 are connected; the fluid purification and filtration module 3 and the pressure stabilization and water supply module 4 are connected; the pressure stabilization and water supply module 4 and the intelligent control module 5 are connected; the intelligent control module 5 and the anti-electromagnetic interference module 6 are connected; the anti-electromagnetic interference module 6 and the exhaust pollution module 7 are connected; the exhaust pollution module 7 and the structural protection module 8 are connected; the structural protection module 8 and the energy consumption optimization module 9 are connected; and the energy consumption optimization module 9 and the remote monitoring module 10 are connected.

[0019] The main circulation power module 1 includes a pump set intelligent switching unit 11, a load adaptation and adjustment unit 12, and a pump set fault diagnosis unit 13. The pump set intelligent switching unit 11 is connected to the load adaptation and adjustment unit 12, and the load adaptation and adjustment unit 12 is connected to the pump set fault diagnosis unit 13. The intelligent switching unit 11 of the pump group adopts three variable frequency centrifugal pumps in parallel and has a built-in 168-hour automatic switching logic. When the operating pump fails or the switching time is reached, the standby pump is automatically started, and the Pac-Coo pressure transmitter is triggered to monitor the pressure continuity. The load adaptation and adjustment unit 12, based on the secondary side water supply temperature and cooling load, links with the Siemens ST60 PLC to automatically adjust the number of pumps in operation. When the temperature is lower than the "temperature to start dual pump outlet valve", only one pump operates; when it is higher than the "temperature to start three pump outlet valve", all three pumps operate in unison. The pump group fault diagnosis unit 13 collects pump group current and temperature data in real time, and, combined with the feedback from the flow transmitter, automatically identifies faults such as overcurrent and idling, generates a diagnostic report, and alarms through a pop-up window on the touch screen.

[0020] The heat exchange core module 2 includes a dual-redundant heat exchange unit 21, a flow PID adjustment unit 22, and a medium adaptation optimization unit 23. The dual-redundant heat exchange unit 21 and the flow PID adjustment unit 22 are connected, and the flow PID adjustment unit 22 and the medium adaptation optimization unit 23 are connected. The dual-redundant heat exchange unit 21 is equipped with two plate heat exchangers, each with a heat exchange capacity of 675KW. They operate in parallel to form redundancy, supporting single-path maintenance and dual-path full-load linkage. It is compatible with a rated temperature difference of 35 / 45℃ on the primary side and 40 / 50℃ on the secondary side. The flow PID regulation unit 22 is linked to the PLC through an electric butterfly valve. Based on the secondary side supply water temperature fed back by the temperature transmitter, it uses a PID algorithm to regulate the primary side flow rate, ensuring that the secondary side supply and return liquid temperatures are stable at 40 / 50℃. The heat exchanger plates of the media adaptation optimization unit 23 are made of stainless steel, supporting 30% ethylene glycol aqueous solution on the primary side and 20% ethylene glycol solution on the secondary side, preventing media freezing in low-temperature environments.

[0021] The pressure stabilizing and water replenishment module 4 includes a dynamic pressure stabilizing unit 41, an intelligent water replenishment control unit 42, and a water replenishment fault protection unit 43. The dynamic pressure stabilizing unit 41 and the intelligent water replenishment control unit 42 are connected, and the intelligent water replenishment control unit 42 and the water replenishment fault protection unit 43 are connected. The dynamic pressure stabilizing unit 41 connects three bladder buffer tanks in series, and monitors the system pressure in real time with a pressure transmitter. When the medium heats up and expands, it compresses the bladder to store liquid. When there is a leak, the bladder is squeezed to replenish the liquid, maintaining the system's rated pressure of 10 bar, avoiding flow instability caused by pressure fluctuations, preventing pipeline impact damage, and ensuring stable circulation. The water replenishment fault protection unit 43 monitors the water pressure and current before the pump when the water replenishment pump is running. When a "water replenishment pump fault" occurs or the water replenishment tank is low, it automatically stops water replenishment and triggers a buzzer alarm, pushing fault information to the touch screen.

[0022] The intelligent control module 5 includes a multi-mode control unit 51, a parameter acquisition and feedback unit 52, and a hierarchical alarm control unit 53. The multi-mode control unit 51 and the parameter acquisition and feedback unit 52 are connected, and the parameter acquisition and feedback unit 52 and the hierarchical alarm control unit 53 are connected. The multi-mode control unit 51 supports three modes: "local manual," "local automatic," and "remote automatic." In local manual mode, pump groups can be started and stopped independently, and electric valves can be adjusted. In local automatic mode, start and stop commands are received from the touchscreen. In remote automatic mode, commands are received from the central control room via the Modbus RTU protocol, rejecting local operation. The parameter acquisition and feedback unit 52 integrates five temperature transmitters, nine pressure transmitters, and two flow transmitters, collecting eleven operating parameters in real time, and synchronizing the data to the touchscreen and the host computer. The hierarchical alarm control unit 53 presets two threshold levels: "pre-alarm" and "trip alarm." For example, "high secondary side water supply temperature" triggers a pre-alarm, and "failure of all three circulating pumps" triggers a trip alarm. Alarm information supports manual reset. Strict adherence to document alarm logic ensures early warning of potential risks and rapid shutdown protection in case of major faults, preventing server damage due to cooling failure.

[0023] The electromagnetic interference suppression module 6 includes a power filtering unit 61, a signal shielding unit 62, and a grounding protection unit 63. The power filtering unit 61 and the signal shielding unit 62 are connected; the signal shielding unit 62 and the grounding protection unit 63 are connected. The power filtering unit 61 incorporates EMI filtering elements in its dual power supply circuits to suppress rapid transient interference and electrostatic discharge interference, ensuring clean power supply to the control circuit. It strictly adheres to electromagnetic interference resistance design standards to withstand strong electromagnetic interference in data centers and prevent malfunctions of the PLC and transmitters. The sensor and controller connection lines in the signal shielding unit 62 utilize shielded cables, with power lines and signal lines laid separately to reduce crosstalk and ensure accurate analog signal transmission. The equipment casing and control circuit in the grounding protection unit 63 are independently grounded, with a grounding resistance ≤4Ω, dissipating electromagnetic interference energy and preventing safety risks caused by equipment leakage.

[0024] The energy consumption optimization module 9 includes a load dynamic matching unit 91 and an operating parameter optimization unit 92, which are connected together.

[0025] The load dynamic matching unit 91 automatically adjusts the number of pumps and the flow rate of the heat exchanger based on the secondary water supply temperature and the server's heat load. Under low load, a single pump and a single heat exchanger operate; under full load, three pumps and two heat exchangers operate in tandem, adapting to energy regulation needs. The operating parameter optimization unit 92 optimizes the heat exchanger operating parameters, reducing heat exchange temperature difference losses. Simultaneously, it adjusts the pump speed via PLC to reduce ineffective output at a rated power consumption of 16.3KW. This improves energy efficiency, ensuring minimal energy consumption at a heat exchange capacity of 1350KW, meeting the green energy-saving requirements of data centers.

[0026] A control method for a 1350KW data center liquid-cooled CDU temperature control unit, the specific steps of which include: Step S101: System power-on and basic preparation. Connect the dual 380Vac power supply, start the equipment self-test to detect power supply phase loss / phase reversal and electromagnetic interference protection, initialize the communication interface to support linkage with the local panel and central control system, load the rated parameters of 10 bar pressure, 35 / 45℃ on the primary side and 40 / 50℃ on the secondary side, and complete the preparation before startup. Step S102: Select the operating mode. Manual mode: Adapts to debugging / maintenance, and can control the start and stop of pumps and valves independently; Local automatic mode: Responds to start and stop commands from the local screen and enters unattended operation logic; Remote automatic mode: Receives commands from the central control system to prevent misoperation for 5 seconds and rejects local operation; Stop mode: Locks the equipment and retains only the alarm function. Step S103: Main circulation start-up and media filtration. Start one main circulation pump. After a 30-second delay and stabilization, the secondary side 20% ethylene glycol and the primary side 30% ethylene glycol media are filtered through corresponding precision filters and enter the circulation pipeline. Monitor the pump outlet pressure to ensure that the flow rate meets the standard. Trigger an alarm when the filter is clogged. Step S104: Pressure stabilization and water replenishment control, real-time monitoring of system pressure: when shutting down, press "static pressure" and when running, press "dynamic pressure" to automatically start the water replenishment pump to replenish water; the bladder-type buffer tank balances pressure fluctuations, and the pump stops and alarms when the water replenishment tank is low, ensuring stable system pressure; Step S105: Parameter monitoring and hierarchical alarm: Collect key parameters such as temperature, pressure, and flow rate, and synchronize them to the local screen and central control; when parameters exceed the pre-alarm threshold, such as pump failure or high temperature, a warning will be issued; when parameters exceed the trip threshold, such as all three pumps fail or the flow rate is too low, the machine will be shut down immediately for protection. Step S106: Load adaptation and pump group switching. When the temperature rises to the corresponding threshold, start the 2nd / 3rd main pump to improve cooling capacity. When the temperature drops, stop the redundant main pump to reduce energy consumption. When running single / dual pumps, if a pump reaches the set time or fails, automatically switch to the standby pump to maintain load stability. Step S107: Shutdown and maintenance preparation. After receiving the stop command, the machine will be shut down after a 30-second delay. The main pump and the water supply pump will be turned off in sequence. The exhaust valve / drain outlet will be opened to clean up the residual medium. The operating data load and alarm records will be saved, and the equipment will enter standby mode.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A 1350KW data center liquid cooling CDU temperature control unit, comprising a machine body (100), characterized in that: The bottom of the machine body (100) is provided with multiple casters (101). A drain pipe (102) is provided at the right end of the machine body (100). A box (103) is fixedly installed at the left end of the machine body (100). A water inlet pipe (104) is provided at the left end of the box (103). A guide pipe (105) is slidably sleeved inside the box (103). The guide pipe (105) is fixedly connected to the machine body (100). Two symmetrically distributed rotating shafts (106) are rotatably sleeved inside the box (103). A motor (107) is fixedly installed at the left end of the box (103). The output end of the motor (107) is rotatably connected to the box (103). The output end of (107) is fixedly connected to one of the rotating shafts (106). A rotating ring (108) is fixedly connected to the outer side of the rotating shaft (106). A connecting shaft (109) is rotatably connected between the two rotating rings (108). A fixed rod (110) is slidably sleeved on the outer side of the connecting shaft (109). A sliding sleeve (111) is fixedly connected to the top of the fixed rod (110). A connecting rod (112) is slidably sleeved inside the sliding sleeve (111). A support frame (113) is fixedly connected to the top of the connecting rod (112). The support frame (113) is slidably connected to the inner wall of the box (103). A filter element (114) is provided inside the support frame (113).

2. The control method of the 1350KW data center liquid cooling CDU temperature control unit according to claim 1, characterized in that: The specific steps include: Step 1: During the operation of the machine body (100), the coolant is input through the water inlet pipe (104), and then the cooling water enters the interior of the box (103). The water flow will fall on the surface of the filter element (114), and the filter element (114) can filter and purify the water. Step 2: After the cooling water is filtered, it will flow downward through the filter element (114). Then the cooling water falls on the slope at the bottom of the box (103). The water will flow along the slope and then enter the machine (100) through the guide pipe (105). Finally, the water can be output through the drain pipe (102) to cool the data center. Step 3: During the cooling water filtration process, the motor (107) works simultaneously. The output end of the motor (107) drives the rotating shaft (106) to rotate. The rotating shaft (106) will drive the rotating ring (108) to rotate. The rotating ring (108) will drive the connecting shaft (109) to rotate. The connecting shaft (109) will push and pull the fixed rod (110) to move vertically. The fixed rod (110) will drive the sliding sleeve (111) to move. The sliding sleeve (111) can rotate along the connecting rod (112). At the same time, the sliding sleeve (111) can drive the connecting rod (112) and the support frame (113) to move back and forth vertically, which can drive the filter element (114) to shake. This can shake out the impurities that clog the filter element (114) and prevent the filter element (114) from being clogged and affecting the water flow.

3. The 1350KW data center liquid cooling CDU temperature control unit according to claim 1, characterized in that: It also includes a main circulation power module (1), a heat exchange core module (2), a fluid purification and filtration module (3), a pressure stabilization and water supply module (4), an intelligent control module (5), an anti-electromagnetic interference module (6), an exhaust pollution module (7), a structural protection module (8), an energy consumption optimization module (9), and a remote monitoring module (10). The heat exchange core module (2) is connected to the fluid purification and filtration module (3), the fluid purification and filtration module (3) is connected to the pressure stabilization and water supply module (4), the pressure stabilization and water supply module (4) is connected to the intelligent control module (5), the intelligent control module (5) is connected to the anti-electromagnetic interference module (6), the anti-electromagnetic interference module (6) is connected to the exhaust pollution module (7), the exhaust pollution module (7) is connected to the structural protection module (8), the structural protection module (8) is connected to the energy consumption optimization module (9), and the energy consumption optimization module (9) is connected to the remote monitoring module (10).

4. The 1350KW data center liquid cooling CDU temperature control unit according to claim 3, characterized in that: The main circulation power module (1) includes a pump group intelligent switching unit (11), a load adaptation adjustment unit (12) and a pump group fault diagnosis unit (13). The pump group intelligent switching unit (11) and the load adaptation adjustment unit (12) are connected, and the load adaptation adjustment unit (12) and the pump group fault diagnosis unit (13) are connected. The pump set intelligent switching unit (11) uses three variable frequency centrifugal pumps in parallel and has a built-in 168-hour automatic switching logic. When the running pump fails or the switching time is reached, the standby pump is automatically started, and the Paku pressure transmitter is triggered to monitor the pressure continuity. The load adaptation and adjustment unit (12) automatically adjusts the number of pumps in operation according to the secondary side water supply temperature and cooling load, linked with the Siemens ST60 PLC. When the temperature is lower than the "double pump outlet valve temperature", a single pump runs, and when it is higher than the "triple pump outlet valve temperature", all three pumps are linked. The pump set fault diagnosis unit (13) collects pump set current and temperature data in real time, and combined with the flow transmitter feedback, automatically identifies faults such as overcurrent and idling, generates a diagnostic report, and alarms through the touch screen pop-up window.

5. A 1350KW data center liquid-cooled CDU temperature control unit according to claim 3, characterized in that: The heat exchange core module (2) includes a dual-redundant heat exchange unit (21), a flow PID adjustment unit (22) and a medium adaptation optimization unit (23). The dual-redundant heat exchange unit (21) and the flow PID adjustment unit (22) are connected, and the flow PID adjustment unit (22) and the medium adaptation optimization unit (23) are connected. The dual-redundant heat exchange unit (21) is equipped with two plate heat exchangers, each with a heat exchange capacity of 675KW. They are connected in parallel to form redundancy, supporting single-path maintenance and dual-path full-load linkage. They are adapted to the rated temperature difference of 35 / 45℃ on the primary side and 40 / 50℃ on the secondary side. The flow PID adjustment unit (22) is linked with the PLC through an electric butterfly valve. Based on the secondary side water supply temperature fed back by the temperature transmitter, it uses a PID algorithm to adjust the primary side flow rate to ensure that the secondary side supply and return liquid temperature is stable at 40 / 50℃. The heat exchanger plates of the medium adaptation optimization unit (23) are made of stainless steel and support 30% ethylene glycol aqueous solution on the primary side and 20% ethylene glycol solution on the secondary side. They prevent the medium from freezing in low-temperature environments.

6. A 1350KW data center liquid-cooled CDU temperature control unit according to claim 3, characterized in that: The pressure stabilizing and water replenishment module (4) includes a dynamic pressure stabilizing unit (41), an intelligent water replenishment control unit (42), and a water replenishment fault protection unit (43). The dynamic pressure stabilizing unit (41) and the intelligent water replenishment control unit (42) are connected, and the intelligent water replenishment control unit (42) and the water replenishment fault protection unit (43) are connected. The dynamic pressure stabilizing unit (41) connects three bladder buffer tanks in series and uses a pressure transmitter to monitor the system pressure in real time. When the medium heats up and expands, it compresses the air bladder to store liquid. When there is a leak, the air bladder is squeezed to replenish the liquid, maintaining the system's rated pressure of 10 bar. This avoids unstable flow caused by pressure fluctuations, prevents pipeline impact damage, and ensures stable circulation. The water replenishment fault protection unit (43) monitors the water pressure and current before the pump when the water replenishment pump is running. When a "water replenishment pump fault" occurs or the water replenishment tank is at a low level, it automatically stops water replenishment and triggers a buzzer alarm, pushing fault information to the touch screen.

7. A 1350KW data center liquid-cooled CDU temperature control unit according to claim 3, characterized in that: The intelligent control module (5) includes a multi-mode control unit (51), a parameter acquisition and feedback unit (52), and a hierarchical alarm control unit (53). The multi-mode control unit (51) and the parameter acquisition and feedback unit (52) are connected, and the parameter acquisition and feedback unit (52) and the hierarchical alarm control unit (53) are connected. The multi-mode control unit (51) supports three modes: "local manual / local automatic / remote automatic". The local manual mode can start and stop the pump group and adjust the electric valve independently. The local automatic mode responds to the start and stop commands of the touch screen. The remote automatic mode receives commands from the central control room through the Modbus RTU protocol and refuses local operation. The parameter acquisition and feedback unit (52) integrates five temperature transmitters, nine pressure transmitters, and two flow transmitters to collect eleven operating parameters in real time. The data is synchronized to the touch screen and the host computer. The hierarchical alarm control unit (53) presets two-level thresholds: "pre-alarm" and "trip alarm". For example, "high secondary side water supply temperature" triggers a pre-alarm, and "all three circulating pumps are faulty" triggers a trip alarm. The alarm information supports manual reset. The document alarm logic is strictly implemented to provide early warning of potential risks and to quickly shut down the system for protection in case of major failures, so as to avoid damage to the server due to cooling failure.

8. A 1350KW data center liquid-cooled CDU temperature control unit according to claim 3, characterized in that: The electromagnetic interference suppression module (6) includes a power filtering unit (61), a signal shielding unit (62), and a grounding protection unit (63). The power filtering unit (61) and the signal shielding unit (62) are connected; the signal shielding unit (62) and the grounding protection unit (63) are connected. The power filtering unit (61) is equipped with EMI filtering elements in the dual power supply circuit to suppress fast transient interference and electrostatic discharge interference, ensuring the cleanliness of the control circuit power supply. It strictly follows the document's electromagnetic interference resistance design standards to resist strong electromagnetic interference in the data center environment and avoid malfunctions of PLC and transmitters. The sensor and controller connection lines of the signal shielding unit (62) are made of shielded cables. When laying the cables, the power lines and signal lines are laid separately to reduce signal crosstalk and ensure accurate analog signal transmission. The equipment casing and control circuit of the grounding protection unit (63) are independently grounded, with a grounding resistance ≤4Ω, to discharge electromagnetic interference energy and prevent safety risks caused by equipment leakage.

9. A 1350KW data center liquid-cooled CDU temperature control unit according to claim 3, characterized in that: The energy consumption optimization module (9) includes a load dynamic matching unit (91) and an operating parameter optimization (92), which are connected. The load dynamic matching unit (91) automatically adjusts the number of pumps and the flow rate of the heat exchanger based on the secondary side water supply temperature and the server's heat load. At low load, a single pump and a single heat exchanger operate; at full load, three pumps and two heat exchangers operate in tandem, adapting to energy regulation needs. The operating parameter optimization (92) optimizes the heat exchanger operating parameters, reducing heat exchange temperature difference losses. Simultaneously, it adjusts the pump speed via PLC, reducing ineffective output under a rated power consumption of 16.3KW. This improves energy efficiency, ensuring the lowest energy consumption under a 1350KW heat exchange capacity, meeting the green energy-saving requirements of data centers.

10. A control method for a 1350KW data center liquid-cooled CDU temperature control unit according to any one of claims 3-9, characterized in that: The specific steps include: Step S101: System power-on and basic preparation. Connect the dual 380Vac power supply, start the equipment self-test (detect power supply phase loss / phase error, electromagnetic interference protection), initialize the communication interface (support linkage with local panel and central control system), load rated parameters (pressure 10bar, primary side 35 / 45℃, secondary side 40 / 50℃), and complete the preparation before startup. Step S102: Select the operating mode. Manual mode: Adapts to debugging / maintenance, and can control the start and stop of pumps and valves independently; Local automatic mode: Responds to start and stop commands from the local screen and enters unattended operation logic; Remote automatic mode: Receives commands from the central control system (requires 5 seconds to prevent misoperation) and rejects local operation; Stop mode: Locks the equipment and retains only the alarm function. Step S103: Main circulation start-up and media filtration. Start one main circulation pump. After a 30-second delay and stabilization, the secondary side (20% ethylene glycol) and primary side (30% ethylene glycol) media are filtered through corresponding precision filters and enter the circulation pipeline. Monitor the pump outlet pressure to ensure that the flow rate meets the standard. Trigger an alarm when the filter is clogged. Step S104: Pressure stabilization and water replenishment control, real-time monitoring of system pressure: when shutting down, press "static pressure" and when running, press "dynamic pressure" to automatically start the water replenishment pump to replenish water; the bladder-type buffer tank balances pressure fluctuations, and the pump stops and alarms when the water replenishment tank is at a low level to ensure stable system pressure; Step S105: Parameter monitoring and hierarchical alarm: Collect key parameters such as temperature, pressure, and flow rate, and synchronize them to the local screen and central control; issue a warning when the parameter exceeds the pre-alarm threshold (such as pump failure or high temperature), and immediately shut down for protection when the parameter exceeds the trip threshold (such as failure of all three pumps or extremely low flow rate). Step S106: Load adaptation and pump group switching. When the temperature rises to the corresponding threshold, start the 2nd / 3rd main pump to improve cooling capacity. When the temperature drops, stop the redundant main pump to reduce energy consumption. When running single / dual pumps, if a pump reaches the set time or fails, automatically switch to the standby pump to maintain load stability. Step S107: Shutdown and maintenance preparation. After receiving the stop command, the machine will be shut down after a 30-second delay. The main pump and the water supply pump will be turned off in sequence. The exhaust valve / drain outlet will be opened to clean up the residual medium. The operating data (load, alarm records) will be saved, and the equipment will enter standby mode.

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