Liquid cooling distribution device, liquid cooling heat dissipation device and liquid cooling control method

Abstract

The present application relates to liquid cooling heat dissipation technical field, especially point to a kind of liquid cooling distribution device, liquid cooling heat dissipation equipment and liquid cooling control method.The liquid cooling distribution device includes main liquid supply header, flow regulating assembly, multi-channel liquid distribution assembly, multiple cooling medium delivery pipelines and central control unit, wherein the proportional regulating valve of flow regulating assembly is connected in parallel into main liquid supply header, the liquid distributor of multi-channel liquid distribution assembly is connected with proportional regulating valve correspondingly, the parallel branch of liquid distributor is connected with outlet node through reversing valve, and cooling medium delivery pipeline two ends are connected with target heat dissipation equipment respectively;Central control unit realizes the accurate distribution and dynamic adjustment of cooling liquid flow by controlling proportional regulating valve and reversing valve, both solves the problem of uneven flow distribution caused by pipeline resistance difference, and can also adjust flow according to real-time thermal load, and optimizes system energy consumption.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling technology, and in particular to a liquid cooling distribution device, a liquid cooling heat dissipation equipment, and a liquid cooling control method. Background Technology

[0002] In current data center cooling systems, liquid cooling distribution units (CDUs) utilize secondary piping networks to distribute coolant to multiple servers and racks in a distributed manner to achieve efficient thermal management. However, this technical solution faces three main technical bottlenecks:

[0003] Firstly, due to the influence of fluid dynamics, the friction resistance and local resistance caused by the connection of general pipelines are significantly different. Due to the difference in vertical height of the cabinet (such as the top and bottom mounting positions) and the difference in pipeline length from the CDU outlet to the terminal caused by the horizontal deployment distance, the coolant flow rate is unevenly distributed, and the convective heat transfer efficiency at the far heat dissipation terminal is reduced due to insufficient flow.

[0004] Secondly, existing CDU systems mostly adopt a fixed flow distribution strategy or a static adjustment mechanism based on manual / electric valves, which lacks the ability to sense the real-time thermal load of the server and cannot achieve dynamic flow control based on PUE (Power Usage Effectiveness) optimization, which can easily lead to local hot spots or waste of cooling capacity.

[0005] Third, in order to ensure the minimum flow requirements of the terminal heat dissipation unit, the system needs to increase the head of the circulation pump, which leads to an increase in pump power loss throughout the system and reduces the overall energy utilization efficiency of the data center. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problems of uneven coolant flow distribution due to differences in pipeline resistance, lack of dynamic flow control mechanism for real-time heat load sensing, and increased energy consumption due to the need to increase pump power to ensure flow at the far end in existing liquid cooling distribution units (CDUs).

[0007] To address the aforementioned technical problems, this invention provides a liquid-cooled distribution device, a liquid-cooled heat dissipation device, and a liquid cooling control method. The liquid-cooled distribution device includes: a main liquid supply manifold, a flow regulation component, a multi-channel liquid distribution component, multiple cooling medium delivery pipelines, and a central control unit; wherein,

[0008] The flow regulation component includes at least a plurality of proportional regulating valves connected in parallel to the main liquid supply manifold, and the proportional regulating valves are configured to dynamically adjust the coolant flow rate.

[0009] The multi-channel liquid distribution assembly includes multiple sets of flow-adjustable liquid distributors, multiple reversing valves, and multiple liquid outlet nodes. Each liquid distributor is connected to the proportional regulating valve in a one-to-one correspondence. Each liquid distributor has multiple parallel branches, and each parallel branch is connected to a liquid outlet node through the reversing valve.

[0010] The inlet of each cooling medium delivery pipeline is connected to one outlet node, and its outlet is connected to a target heat dissipation device.

[0011] The central control unit controls the proportional regulating valve;

[0012] The number of parallel branches matches the number of target heat dissipation devices, and the multi-channel liquid distribution assembly is configured to dynamically adjust the liquid distribution path by switching the reversing valve.

[0013] In one embodiment of the present invention, the liquid cooling distribution device further includes a coolant supply device connected to the main coolant supply manifold.

[0014] In one embodiment of the present invention, the liquid cooling distribution device further includes a plurality of distributed control units, which are communicatively connected to the central control unit, and the distributed control units are configured to independently control at least one of the reversing valves.

[0015] In one embodiment of the present invention, the liquid cooling distribution device further includes a plurality of temperature monitoring modules, which are connected to the distributed control unit and respectively connected to the coolant supply device and the target heat dissipation device.

[0016] In one embodiment of the present invention, the liquid cooling distribution device further includes a plurality of flow sensors, which are disposed between the reversing valve and the liquid outlet node on each parallel branch and are connected to the distributed control unit.

[0017] In one embodiment of the present invention, the connecting pipeline between the proportional regulating valve and the distributor is a pressure-bearing pipeline, the pressure-bearing capacity of the pressure-bearing pipeline is not lower than a preset pressure threshold, and the preset pressure threshold is determined based on the system working pressure of the liquid-cooled distribution device.

[0018] Based on the same inventive concept, the present invention also provides a liquid cooling heat dissipation device, including the liquid cooling distribution device, which dynamically adjusts the distribution path and flow rate of the coolant according to the heat dissipation requirements of the target heat dissipation device.

[0019] The present invention also provides a liquid cooling control method, applied to the aforementioned liquid cooling heat dissipation device, the liquid cooling control method comprising the following steps:

[0020] S1: Based on the heat dissipation requirements of the target heat dissipation equipment, establish a temperature-flow mapping model, which includes the correspondence between multiple temperature control ranges and liquid distribution path parameters;

[0021] S2: Real-time acquisition of coolant temperature parameters flowing through the target heat dissipation device, and determination of the temperature control range in which the coolant temperature parameters are located;

[0022] S3: Based on the temperature-flow mapping model, generate corresponding reversing control commands and flow adjustment commands, switch to the liquid distribution path that matches the flow specification and dynamically adjust the total flow of coolant so that the coolant temperature parameter tends to the target set value.

[0023] S4: Based on the distance parameter between the target heat dissipation device and the main liquid supply manifold, the liquid distribution path parameters are corrected. When the distance parameter is greater than a preset threshold, a liquid distribution path with a larger flow rate is preferentially allocated. The liquid distribution path parameters include the pipe diameter, length, and flow rate of the liquid distribution path.

[0024] In one embodiment of the present invention, step S3 includes:

[0025] When the coolant temperature parameter is higher than the first preset temperature, the rapid heat dissipation mode is triggered, the liquid distribution channel with the maximum flow rate is switched and the total coolant flow rate is adjusted to the first preset value.

[0026] When the coolant temperature parameter is lower than the second preset temperature, the energy-saving mode is triggered, the liquid distribution channel with the minimum flow rate is switched, and the total coolant flow rate is adjusted to the second preset value, wherein the second preset temperature is lower than the first preset temperature, and the second preset value is lower than the first preset value;

[0027] When the coolant temperature parameter is between the first preset temperature and the second preset temperature, a dynamic adjustment mode is triggered, and the optimal liquid distribution path and total coolant flow rate are calculated based on the temperature-flow mapping model.

[0028] In one embodiment of the present invention, the liquid cooling control method further includes: S5: using a PWM-like signal to modulate the flow regulation command to generate an on / off control signal with an adjustable duty cycle, controlling the working state of the flow regulation device, and realizing fine regulation of the liquid supply flow rate, wherein the flow rate accuracy of the fine regulation is less than a preset flow rate threshold.

[0029] The technical solution of the present invention has the following advantages compared with the prior art:

[0030] First, precise flow distribution: Through the cooperation of proportional control valves and multi-channel distribution components, the flow rate of each cooling medium delivery pipeline can be flexibly adjusted according to differences in pipeline distance and heat dissipation requirements. Reversing valves connect distribution channels of different specifications, and combined with the proportional control valve's control of the total flow rate of the distributor, effectively compensate for differences in pipeline resistance caused by physical location, ensuring that the coolant is evenly distributed to each target heat dissipation device, and preventing reduced heat dissipation efficiency in remote equipment due to insufficient flow.

[0031] Second, dynamic intelligent control: Based on the real-time acquisition of coolant temperature by the temperature monitoring module, the central control unit can automatically trigger the reversing valve control command and adjust the opening of the proportional regulating valve according to the pre-defined temperature control range. This dynamic flow control mechanism can respond to changes in server heat load in real time. When the equipment temperature rises, it quickly increases the coolant flow to enhance heat dissipation; when the heat dissipation demand is low, it reduces the flow to reduce heat waste, achieving intelligent heat dissipation based on PUE optimization and avoiding local overheating problems.

[0032] Third, energy saving and consumption reduction: Instead of increasing pump power to ensure flow to remote devices, precise flow distribution and dynamic control reduce unnecessary energy consumption of the circulating pump while meeting the cooling needs of all target cooling devices. Furthermore, the low-flow energy-saving cooling mode under low cooling demand conditions further reduces system energy consumption and improves the overall energy efficiency of the data center. Attached Figure Description

[0033] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0034] Figure 1 This is a schematic diagram of a liquid-cooled distribution device provided in an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of a specific structure of a liquid-cooled distribution device provided in an embodiment of the present invention;

[0036] Figure 3 This is a schematic flowchart of a liquid cooling control method provided in an embodiment of the present invention;

[0037] Explanation of reference numerals on the accompanying drawings:

[0038] 1. Main liquid supply manifold; 2. Flow regulation assembly; 21. Proportional regulating valve; 3. Multi-channel liquid distribution assembly; 31. Liquid distributor; 311. Parallel branch; 32. Reversing valve; 33. Liquid outlet node; 4. Cooling medium delivery pipeline; 5. Central control unit; 6. Coolant supply equipment; 7. Distributed control unit; 8. Temperature monitoring module; 9. Flow sensor; 100. Target heat dissipation equipment. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0040] Example 1:

[0041] Reference Figure 1 and Figure 2 As shown, this invention provides a liquid cooling distribution device, which includes: a main liquid supply manifold 1, a flow regulation component 2, a multi-channel liquid distribution component 3, multiple cooling medium delivery pipes 4, and a central control unit 5. This device achieves precise distribution of coolant through graded flow regulation and intelligent control.

[0042] The flow regulation component 2 includes at least a plurality of proportional regulating valves 21 connected in parallel to the main liquid supply manifold 1, and the proportional regulating valves are configured to dynamically adjust the coolant flow rate.

[0043] The multi-channel liquid distribution assembly 3 includes multiple sets of flow-adjustable liquid distributors 31, multiple reversing valves 32, and multiple liquid outlet nodes 33. Each liquid distributor 31 is connected to the proportional regulating valve 21 in a one-to-one correspondence. Each liquid distributor 31 is provided with multiple parallel branches 311, and each parallel branch 311 is connected to a liquid outlet node 33 through the reversing valve 32.

[0044] The input end of each cooling medium delivery pipe 4 is connected to one of the liquid outlet nodes 33, and its output end is connected to a target heat dissipation device 100.

[0045] The central control unit 5 controls the proportional regulating valve 21;

[0046] The number of parallel branches 311 is matched with the number of target heat dissipation devices 100, and the multi-channel liquid distribution assembly 3 is configured to dynamically adjust the liquid distribution path by switching the reversing valve 32.

[0047] As can be seen from the above technical solution, the present invention performs a first-stage coarse adjustment of the total flow rate of the main liquid supply manifold 1 through the proportional regulating valve 21, and then performs a second-stage fine adjustment through the distributor 31 and the reversing valve 32 of the multi-channel liquid distribution assembly 3. The multiple parallel branches 311 of each distributor 31 can select different flow rate specifications (such as large, medium, and small flow distributors) according to the location and resistance characteristics of the target heat dissipation device 100 through the reversing valve 32 to achieve precise flow ratio. The flow rate adjustment range of the distributor 31 is from 0 to the maximum output flow rate of the liquid cooling distribution device, supporting ≥2 sets of distributors with different flow rate specifications in parallel configuration to meet the flow compensation requirements of pipelines with different resistances.

[0048] Taking a scenario where the target cooling device 100 is the server or other equipment in a data center, specifically as follows: Figure 2 As shown, the multi-channel liquid distribution assembly 3 includes two sets of flow-adjustable distributors 31, multiple reversing valves 32, and multiple outlet nodes 33. Each distributor 31 is connected to a proportional regulating valve 21 in a one-to-one correspondence. Each distributor 31 has multiple parallel branches 311, each parallel branch 311 connected to one of the reversing valves 32, and each reversing valve 32 connected to one outlet node 33. The two distributors 31 are respectively connected to liquid distribution channels with different flow rates.

[0049] Furthermore, in this embodiment, the liquid cooling distribution device also includes a coolant supply device 6 (CDU), which is connected to the main supply manifold 1. For target heat dissipation devices 100 that are far from the coolant supply device 6 or have high resistance, the opening of the corresponding proportional regulating valve 21 is increased to 60%-100% by the central control unit 5, and the flow rate is switched to a distribution path with a larger flow rate (such as a channel with a pipe diameter ≥ DN25 in the parallel branch 311) to compensate for the flow rate reduction caused by the pipeline resistance with a compensation accuracy of ≤ ±5%, thereby ensuring a balanced coolant distribution for each device.

[0050] For liquid cooling systems with wide coverage and numerous branches (such as large data centers with multiple server rooms), the liquid cooling distribution device also includes multiple distributed control units 7. These distributed control units 7 are connected to the central control unit 5 via a bus communication connection, and each distributed control unit 7 is configured to independently control at least one of the reversing valves 32. The distributed control units 7 can be deployed by region or functional module (e.g., one control unit per rack group), flexibly adapting to the physical expansion needs of the system and avoiding signal attenuation or delay caused by excessive communication distance with the central control unit 5.

[0051] Specifically, a layered architecture of "central decision-making + distributed execution" is adopted. The central control unit 5 is responsible for overall coordination and strategy formulation, such as allocating flow targets according to the overall heat load and monitoring the system operation status. The distributed control unit 7 focuses on real-time control of the specific execution layer, such as the opening and closing of individual valves and fine-tuning of flow, so as to avoid the central control unit 5 from experiencing performance bottlenecks due to processing massive amounts of underlying data.

[0052] The distributed control unit 7 can pre-filter and process local sensor data (such as flow rate and temperature), transmitting only critical information (such as anomaly warnings and adjustment results) to the central control unit 5, reducing communication bandwidth usage and improving overall system stability. When the heat dissipation demand of any parallel branch 311 changes suddenly (such as a sudden increase in the load of a server), the nearest distributed control unit 7 immediately performs adjustment actions (such as switching the liquid distribution path of the reversing valve 32 or adjusting the opening of the proportional control valve 21), achieving "local problem local solution" and improving the system's response efficiency to changes in local operating conditions.

[0053] When a fault occurs in a distributed control unit 7 or its controlled branch (such as a stuck reversing valve 32), the fault only affects a local area, and the central control unit 5 can still maintain the overall operation of the system through other distributed control units 7. At the same time, the central control unit 5 can automatically take over control of the faulty area (such as increasing the opening of the corresponding proportional regulating valve 21 to compensate for the flow), avoiding system paralysis caused by a single point of failure.

[0054] In addition, in this embodiment, the liquid cooling distribution device also includes multiple temperature monitoring modules 8, which are connected to the distributed control unit 7, and are also connected to the coolant supply device 6 and the coolant outlet port of the target heat dissipation device 100.

[0055] By simultaneously monitoring the supply temperature of the coolant supply device 6 and the outlet temperature of the target heat dissipation device 100, temperature control of the entire coolant circulation process is achieved. This allows for both monitoring the initial supply status and real-time understanding of the coolant's temperature rise after heat exchange with the equipment, providing a complete temperature data chain for the central control unit 5 and avoiding information blind spots.

[0056] Based on the temperature data from both ends, the central control unit 5 can accurately calculate the actual heat exchange of the coolant in the target heat dissipation device 100, and thus determine the current heat load of the device. If the outlet temperature is too high, the proportional regulating valve 21 is quickly adjusted to increase the flow rate, and the high-flow liquid distribution path is switched through the reversing valve 32; when the temperature is low, the flow rate is reduced to achieve on-demand cooling, avoid waste of cooling capacity, and improve overall heat dissipation efficiency.

[0057] Furthermore, the liquid cooling distribution device also includes multiple flow sensors 9, which are disposed between the reversing valve 32 and the liquid outlet node 33 on each parallel branch 311 and are connected to the distributed control unit 7.

[0058] A flow sensor 9 is installed on the parallel branch 311 of the liquid cooling distribution device to monitor the coolant flow rate of each branch in real time, providing accurate flow data feedback to the system. By installing the flow sensor 9 between the reversing valve 32 and the outlet node 33, turbulence interference during valve switching can be effectively avoided, ensuring measurement accuracy. This data is transmitted to the central control unit 5 via the distributed control unit 7. Combined with the data fed back by the temperature monitoring module 8, the central control unit 5 can accurately calculate the actual needs of each target heat dissipation device, dynamically adjust the opening of the proportional regulating valve 21 and the passage of the reversing valve 32, and achieve precise distribution of coolant flow rate, which not only meets the heat dissipation needs of high-load equipment, but also achieves intelligent energy saving in a low-power state.

[0059] Meanwhile, the flow anomaly detection function can promptly warn of problems such as pipeline blockage, valve failure, or leakage, which is more forward-looking than traditional temperature feedback mechanisms and significantly improves system reliability and maintenance efficiency. This closed-loop design of "monitoring-decision-execution" enables the liquid cooling system to maintain efficient and stable operation under complex conditions, providing an innovative solution for thermal management in fields such as data centers and new energy vehicles.

[0060] Based on the feedback from the flow sensor 9, the central control unit 5 can dynamically adjust the pump power. Under low heat dissipation requirements, the pump speed is reduced to decrease the flow rate, avoiding energy waste caused by maintaining a high flow rate; under high load, the flow rate is precisely allocated, eliminating the need to blindly increase the overall pump power, achieving on-demand liquid supply, reducing system operating energy consumption, and improving the energy utilization efficiency of the data center.

[0061] Specifically, in this embodiment, the connecting pipeline between the proportional regulating valve 21 and the distributor 31 is a pressure-bearing pipeline. The pressure-bearing capacity of the pressure-bearing pipeline is not lower than a preset pressure threshold, and the preset pressure threshold is determined based on the system operating pressure of the liquid-cooled distribution device. Preferably, the connecting pipeline is a stainless steel rigid pipe or a high-pressure flexible pipe, and its pressure-bearing capacity is not lower than 1.6 MPa.

[0062] Furthermore, the cooling medium delivery pipeline 4 adopts a high thermal conductivity metal pipe or a reinforced polymer hose, and its inlet end is connected to the corresponding liquid outlet node 33 by a flange or quick-connect fitting. The outlet end is coupled to the cold plate channel of the target heat dissipation device 100 through a standard hydraulic interface.

[0063] In addition, the liquid cooling distribution apparatus provided in this embodiment is not limited to being used in a liquid cooling distribution unit (CDU), and can be widely adapted to industrial systems requiring high-precision fluid distribution. It supports ISO6162 standard hydraulic interfaces (pipe diameters from DN6 to DN50), is compatible with pressure environments of 0.5-2.5MPa, can be connected to DCS / PLC systems via protocols such as Modbus / TCP, and is applicable to scenarios such as data center heat dissipation, industrial process temperature control, and new energy battery thermal management. When the directional valve 32 fails, the central control unit 5 can automatically increase the opening of the proportional regulating valve 21 of the corresponding distributor 31, maintain the flow rate of the faulty branch, and ensure continuous operation of the system.

[0064] Embodiment 2:

[0065] Based on the same inventive concept as Embodiment 1, the present invention further provides a liquid cooling heat dissipation device, comprising the liquid cooling distribution apparatus described in Embodiment 1, which dynamically adjusts the distribution path and flow rate of the cooling liquid through the liquid cooling distribution apparatus according to the heat dissipation demand of the target heat dissipation device 100.

[0066] Wherein, the central control unit 5 supports the Redfish protocol. The Redfish protocol is designed based on a RESTful architecture, and establishes a two-way communication link with the server baseboard management controller (BMC) through a standardized API interface, so as to realize real-time collection and analysis of thermal load data of key components such as CPUs and GPUs.

[0067] This device adopts an edge computing architecture, and the main control unit is built with an adaptive thermal management algorithm, which can dynamically adjust the opening of the proportional regulating valve 21 and the passage of the directional valve 32 of the liquid cooling distribution apparatus according to real-time thermal load data, so as to realize a millisecond-level linkage response between the cooling liquid flow rate and the power consumption of IT equipment. By constructing a digital twin model, the physical heat dissipation system is mapped to a virtual management space, which supports visualized monitoring and optimization of heat flow distribution.

[0068] At the system integration level, the standardized interface based on the Redfish protocol supports seamless docking with the data center infrastructure management (DCIM) platform, realizing unified management of the heat dissipation system and infrastructures such as power supply and distribution and network equipment. Operation and maintenance personnel can complete full-lifecycle management including equipment status monitoring, parameter configuration, and energy efficiency analysis through a single operation interface of the DCIM platform, effectively improving the intelligent operation and maintenance level of the data center.

[0069] Embodiment 3:

[0070] The present invention further provides a liquid cooling control method, which is applied to the liquid cooling heat dissipation device described in Embodiment 2. As Figure 3 shown, the liquid cooling control method includes the following steps:

[0071] S1: Based on the heat dissipation requirements of the target heat dissipation device 100, a temperature-flow mapping model is established. The mapping model includes the correspondence between multiple temperature control ranges and liquid distribution path parameters.

[0072] S2: Real-time acquisition of coolant temperature parameters flowing through the target heat dissipation device 100, and determination of the temperature control range in which the coolant temperature parameters are located;

[0073] S3: Based on the temperature-flow mapping model, generate corresponding reversing control commands and flow adjustment commands, switch to the liquid distribution path with the appropriate flow rate and dynamically adjust the total flow rate of the coolant so that the coolant temperature parameter tends to the target set value; specifically, according to the temperature range division, trigger the corresponding reversing valve 32 control command to switch to the liquid distribution path with the appropriate flow rate, and at the same time, according to the heat exchange requirements, dynamically adjust the opening of the proportional regulating valve 21 to control the total flow rate of the distributor 31 so as to realize the coolant temperature quickly converges to the target set value, or maintain a low flow energy-saving heat dissipation mode under low heat dissipation demand conditions;

[0074] S4: Based on the distance parameter between the target heat dissipation device 100 and the main liquid supply manifold 1, the liquid distribution path parameters are corrected. When the distance parameter is greater than a preset threshold, the target heat dissipation device 100 is preferentially switched to a liquid distribution path with a larger flow rate, and the opening of the corresponding proportional regulating valve 21 is increased to ensure the heat dissipation effect under long-distance transmission; wherein, the liquid distribution path parameters include the pipe diameter, length and flow rate of the liquid distribution path.

[0075] Specifically, in step S1, a temperature-flow mapping model is established based on the heat dissipation requirements of the target heat dissipation device 100. This model clarifies the correspondence between multiple temperature control ranges and liquid distribution path parameters (including pipe diameter, length, and flow rate specifications). Simultaneously, the central control unit 5, based on historical temperature data and equipment load variation patterns, uses machine learning algorithms to periodically and dynamically optimize the temperature control ranges. For example, during periods of high equipment load, the temperature control range is narrowed to improve heat dissipation response speed; during periods of low load, the range is widened to reduce valve operation frequency and lower equipment wear and energy consumption.

[0076] Furthermore, in step S3, based on the temperature-flow mapping model, commutation control commands and flow regulation commands are generated to achieve coolant flow regulation, specifically including the following steps:

[0077] When the coolant temperature parameter is higher than the first preset temperature, the rapid heat dissipation mode is triggered, and the reversing valve 32 switches to the liquid distribution passage with the maximum flow rate and adjusts the total coolant flow rate to the first preset value.

[0078] When the coolant temperature parameter is lower than the second preset temperature, the energy-saving mode is triggered. The reversing valve 32 switches to the liquid distribution channel with the minimum flow rate and adjusts the total coolant flow rate to the second preset value, wherein the second preset temperature is less than the first preset temperature and the second preset value is less than the first preset value.

[0079] When the coolant temperature parameter is between the first preset temperature and the second preset temperature, a dynamic adjustment mode is triggered, and the optimal liquid distribution path and total coolant flow rate are calculated based on the temperature-flow mapping model.

[0080] The second preset temperature is lower than the first preset temperature, and the second preset value is less than the first preset value.

[0081] In addition to controlling the directional valve 32 and the proportional control valve 21 according to the temperature range, a multi-stage flow control strategy is introduced:

[0082] When the temperature is slightly off-range, the opening of the proportional control valve 21 is adjusted first to make a small adjustment of the flow rate; if the temperature deviation continues to increase and exceeds the set range, the reversing valve 32 is quickly switched to the liquid distribution passage with the appropriate flow rate, and the opening of the proportional control valve 21 is adjusted significantly at the same time to achieve step-by-step precise control of the coolant flow rate and ensure that the coolant temperature is efficiently converged to the target set value.

[0083] Furthermore, the liquid cooling control method also includes S5: in order to actively adapt to the mechanical response characteristics of the valve, a PWM-like signal is used to modulate the flow regulation command to generate an on / off control signal with an adjustable duty cycle, thereby controlling the working state of the reversing valve 32 and realizing fine regulation of the liquid supply flow rate, wherein the flow rate accuracy of the fine regulation is less than a preset flow rate threshold.

[0084] Specifically, the distributed controller 7 modulates the flow regulation command using a PWM-like signal. This allows for precise control of the liquid supply flow rate (with an accuracy less than a preset threshold) through duty cycle adjustment. It also allows for flexible adjustment of the modulation frequency based on the physical response characteristics of the reversing valve 32, avoiding insufficient valve response or mechanical wear issues caused by traditional high-frequency PWM signals. Simultaneously, the optimized modulation strategy reduces the instantaneous current surge of the coil drive and supports circuit load balancing during multi-channel concurrent control, significantly improving the system's control accuracy, reliability, and actuator lifespan. This is particularly suitable for liquid cooling systems where high flow accuracy is required while balancing hardware cost and stability.

[0085] During the entire cooling process, if the temperature of any target heat dissipation device 100 continuously exceeds the upper limit of the set range, and the flow rate has been adjusted to the maximum but still cannot effectively reduce the temperature, or if a critical component such as the temperature monitoring module 8 or the flow sensor 9 malfunctions and causes abnormal data, the central control unit 5 will immediately issue an alarm and activate an adaptive compensation mechanism according to the fault type. This may involve automatically switching to a backup monitoring module to obtain data, or estimating and maintaining a reasonable coolant flow rate based on historical data and the operating status of other equipment, ensuring the basic operational function of the heat dissipation system until the fault is resolved.

[0086] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A liquid-cooled distribution device, characterized in that, include: Main liquid supply manifold; A flow regulation component, comprising multiple proportional regulating valves connected in parallel to the main coolant supply manifold, wherein the proportional regulating valves are configured to dynamically adjust the coolant flow rate; A multi-channel liquid dispensing assembly includes multiple sets of flow-adjustable liquid dispensers, multiple reversing valves, and multiple liquid outlet nodes. Each liquid dispenser is connected to a proportional regulating valve in a one-to-one correspondence. Each liquid dispenser has multiple parallel branches, and each parallel branch is connected to a liquid outlet node through the reversing valve. Multiple cooling medium delivery pipelines, each with its input end connected to one of the liquid outlet nodes and its output end connected to a target heat dissipation device; and a central control unit, wherein the central control unit controls the proportional regulating valve; The number of parallel branches is matched with the number of target heat dissipation devices, and the multi-channel liquid distribution assembly is configured to dynamically adjust the liquid distribution path by switching the reversing valve. The liquid cooling distribution device also includes multiple distributed control units, which are communicatively connected to the central control unit and configured to independently control at least one of the reversing valves. The proportional regulating valve performs a primary coarse adjustment on the total flow rate of the main liquid supply manifold, and then the distributors and reversing valves of the multi-channel liquid distribution assembly perform a secondary fine adjustment. The multiple parallel branches of each distributor select different flow rate distribution paths according to the location and resistance characteristics of the target heat dissipation equipment through the reversing valve.

2. The liquid-cooled distribution device according to claim 1, characterized in that, The liquid cooling distribution device also includes a coolant supply device, which is connected to the main coolant supply manifold.

3. The liquid-cooled distribution device according to claim 1, characterized in that, The liquid cooling distribution device also includes multiple temperature monitoring modules, which are connected to the distributed control unit and respectively connected to the coolant supply device and the target heat dissipation device.

4. The liquid-cooled distribution device according to claim 1, characterized in that, The liquid cooling distribution device also includes multiple flow sensors, which are installed between the reversing valve and the liquid outlet node on each parallel branch and are connected to the distributed control unit.

5. The liquid-cooled distribution device according to claim 1, characterized in that, The connecting pipeline between the proportional regulating valve and the distributor is a pressure-bearing pipeline. The pressure-bearing capacity of the pressure-bearing pipeline is not lower than a preset pressure threshold, and the preset pressure threshold is determined based on the system working pressure of the liquid-cooled distribution device.

6. A liquid cooling heat dissipation device, characterized in that, Includes the liquid cooling distribution device as described in any one of claims 1 to 5, which dynamically adjusts the distribution path and flow rate of the coolant according to the heat dissipation requirements of the target heat dissipation device.

7. A liquid cooling control method, characterized in that, The liquid cooling control method, applied to the liquid cooling heat dissipation device as described in claim 6, includes the following steps: S1: Based on the heat dissipation requirements of the target heat dissipation equipment, establish a temperature-flow mapping model, which includes the correspondence between multiple temperature control ranges and liquid distribution path parameters; S2: Real-time acquisition of coolant temperature parameters flowing through the target heat dissipation device, and determination of the temperature control range in which the coolant temperature parameters are located; S3: Based on the temperature-flow mapping model, generate corresponding reversing control commands and flow adjustment commands, switch to the liquid distribution path that matches the flow specification and dynamically adjust the total flow of coolant so that the coolant temperature parameter tends to the target set value. S4: Based on the distance parameter between the target heat dissipation device and the main liquid supply manifold, the liquid distribution path parameter is corrected. When the distance parameter is greater than the preset threshold, the liquid distribution path with a larger flow rate is preferentially allocated. The liquid distribution path parameters include the pipe diameter, length, and flow rate specifications of the liquid distribution path.

8. The liquid cooling control method according to claim 7, characterized in that, Step S3 includes: When the coolant temperature parameter is higher than the first preset temperature, the rapid heat dissipation mode is triggered, the liquid distribution channel with the maximum flow rate is switched and the total coolant flow rate is adjusted to the first preset value. When the coolant temperature parameter is lower than the second preset temperature, the energy-saving mode is triggered, the liquid distribution channel with the minimum flow rate is switched, and the total coolant flow rate is adjusted to the second preset value, wherein the second preset temperature is lower than the first preset temperature, and the second preset value is lower than the first preset value; When the coolant temperature parameter is between the first preset temperature and the second preset temperature, a dynamic adjustment mode is triggered, and the optimal liquid distribution path and total coolant flow rate are calculated based on the temperature-flow mapping model.

9. The liquid cooling control method according to claim 7, characterized in that, The liquid cooling control method further includes: S5: using a PWM-like signal to modulate the flow regulation command, generating an on / off control signal with an adjustable duty cycle, controlling the working state of the flow regulation device, and realizing fine regulation of the liquid supply flow rate, wherein the flow rate accuracy of the fine regulation is less than a preset flow rate threshold.

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