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

Abstract

The invention relates to the technical field of liquid cooling heat dissipation, in particular to a liquid cooling distribution device, liquid cooling heat dissipation equipment and a liquid cooling control method. The liquid cooling distribution device comprises a main liquid supply collecting pipe, a flow adjusting assembly, a multi-channel liquid distribution assembly, a plurality of cooling medium conveying pipelines and a central control unit, a proportioning valve of the flow adjusting assembly is connected into the main liquid supply collecting pipe in parallel, and a liquid distributor of the multi-channel liquid distribution assembly is correspondingly connected with the proportioning valve. A parallel branch of the liquid separator is connected with the liquid outlet node through the reversing valve, and the two ends of the cooling medium conveying pipeline are connected with the liquid outlet node and target heat dissipation equipment respectively; the central control unit achieves accurate distribution and dynamic adjustment of the flow of the cooling liquid by controlling the proportion adjusting valve and the reversing valve, the problem of uneven flow distribution caused by pipeline resistance difference is solved, the flow can be adjusted according to real-time heat loads, and system energy consumption is optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid cooling heat dissipation, in particular to a liquid cooling distribution device, a liquid cooling heat dissipation equipment and a liquid cooling control method. BACKGROUND

[0002] In the current data center heat dissipation system, the liquid cooling distribution unit (CDU) realizes the distributed supply of cooling liquid to multiple servers and cabinets based on the secondary side pipe network, so as to achieve the goal of efficient heat management. However, this technical solution has three technical bottlenecks:

[0003] Firstly, due to the influence of fluid mechanics characteristics, the difference between the along-path resistance and the local resistance caused by the connection of the general pipe is significant. Due to the difference in the length of the pipe from the CDU outlet to the terminal caused by the vertical height difference (such as the top and bottom installation positions) and the horizontal deployment distance of the cabinet, the cooling liquid flow appears non-uniform distribution phenomenon, and the flow of the remote heat dissipation terminal is insufficient, resulting in the reduction of convective heat transfer efficiency.

[0004] Secondly, the existing CDU system mostly adopts a fixed flow distribution strategy or a static adjustment mechanism based on manual / electric valves, lacks the ability to perceive the real-time heat load of the server, and cannot realize the dynamic flow regulation based on PUE (power usage efficiency) optimization, which is easy to cause local hot spots or waste of cooling capacity.

[0005] Thirdly, in order to guarantee the minimum flow demand of the terminal heat dissipation unit, the system needs to increase the circulating pump head, which increases the pump power loss of the whole system and reduces the overall energy utilization efficiency of the data center. SUMMARY

[0006] Therefore, the technical problem to be solved by the present application is to overcome the problems of the existing liquid cooling distribution unit (CDU) that the cooling liquid flow is not uniformly distributed due to the difference in pipe resistance, lacks a dynamic flow regulation mechanism for real-time heat load perception, and increases energy consumption to guarantee the flow of the remote terminal.

[0007] To solve the above technical problems, the present application provides a liquid cooling distribution device, a liquid cooling heat dissipation equipment and a liquid cooling control method, the liquid cooling distribution device comprising: a main liquid supply header, a flow regulation assembly, a multi-channel liquid distribution assembly, a plurality of cooling medium conveying pipelines and a central control unit; wherein,

[0008] The flow regulation assembly comprises at least a plurality of proportional regulation valves connected in parallel to the main liquid supply header, and the proportional regulation valves are configured to dynamically adjust the cooling liquid flow;

[0009] The multi-channel distribution assembly comprises multiple groups of flow-adjustable distributors, multiple reversing valves and multiple liquid outlet nodes, the distributors are connected to the proportional regulating valves one by one, each group of distributors is provided with multiple parallel branches, and each parallel branch is connected to a liquid outlet node through the reversing valve;

[0010] The input end of each cooling medium conveying pipeline is connected to one of the liquid outlet nodes, and the output end is connected to a target heat dissipation device;

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

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

[0013] In an embodiment of the present application, the liquid cooling distribution device further comprises a cooling liquid supply device connected to the main liquid supply header.

[0014] In an embodiment of the present application, the liquid cooling distribution device further comprises multiple distributed control units, which are connected in communication with the central control unit, and the distributed control units are configured to independently control at least one reversing valve.

[0015] In an embodiment of the present application, the liquid cooling distribution device further comprises multiple temperature monitoring modules connected to the distributed control units and respectively connected to the cooling liquid supply device and the target heat dissipation device.

[0016] In an embodiment of the present application, the liquid cooling distribution device further comprises multiple flow sensors arranged between the reversing valve and the liquid outlet node on each parallel branch, and connected to the distributed control unit.

[0017] In an embodiment of the present application, 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 less than a preset pressure threshold, and the preset pressure threshold is determined based on the system working pressure of the liquid cooling distribution device.

[0018] Based on the same inventive concept, the present application also provides a liquid cooling heat dissipation device comprising the liquid cooling distribution device, which dynamically adjusts the distribution path and flow of cooling liquid according to the heat dissipation requirement of the target heat dissipation device.

[0019] The present application also provides a liquid cooling control method applied to the liquid cooling heat dissipation device, which comprises the following steps:

[0020] S1: establishing a temperature-flow mapping model according to the heat dissipation requirement characteristics of the target heat dissipation device, the mapping model including a corresponding relationship between a plurality of temperature control intervals and distribution passage parameters;

[0021] S2: acquiring a cooling liquid temperature parameter flowing through the target heat dissipation device in real time, and determining a temperature control interval in which the cooling liquid temperature parameter is located;

[0022] S3: generating corresponding switching control instructions and flow regulation instructions based on the temperature-flow mapping model, switching to a distribution passage with an adaptive flow specification and dynamically adjusting a total cooling liquid flow to make the cooling liquid temperature parameter tend to a target set value;

[0023] S4: correcting the distribution passage parameters based on a distance parameter between the target heat dissipation device and a main supply liquid header, and preferentially allocating a distribution passage with a larger flow specification when the distance parameter is greater than a preset threshold value, wherein the distribution passage parameters include a pipe diameter, a length and a flow specification of the distribution passage.

[0024] In an embodiment of the present application, the step S3 includes:

[0025] When the cooling liquid temperature parameter is higher than a first preset temperature, triggering a rapid heat dissipation mode, switching to a distribution passage with a maximum flow specification and adjusting the total cooling liquid flow to a first preset value;

[0026] When the cooling liquid temperature parameter is lower than a second preset temperature, triggering an energy-saving mode, switching to a distribution passage with a minimum flow specification and adjusting the total cooling liquid flow to a 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;

[0027] When the cooling liquid temperature parameter is between the first preset temperature and the second preset temperature, triggering a dynamic adjustment mode, and calculating an optimal distribution passage and a total cooling liquid flow based on the temperature-flow mapping model.

[0028] In an embodiment of the present application, the liquid cooling control method further includes: S5: modulating the flow regulation instructions by using a PWM-like signal to generate an on-off control signal with adjustable duty cycle, controlling the working state of a flow regulation device, and realizing fine adjustment of the supply liquid flow, wherein the fine adjustment has a flow accuracy less than a preset flow threshold value.

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

[0030] First, accurate flow distribution: through the cooperation of proportional regulating valves and multi-channel distribution components, the flow of each cooling medium delivery pipeline can be flexibly adjusted according to the pipeline distance and the difference in heat dissipation requirements. The reversing valve is connected to different specifications of the distribution path, and the proportional regulating valve controls the total flow of the distributor, which can effectively compensate for the difference in pipeline resistance caused by physical location, so that the cooling liquid is evenly distributed to each target heat dissipation equipment, avoiding the decrease of heat dissipation efficiency of the remote equipment due to insufficient flow.

[0031] Second, dynamic intelligent regulation: based on the real-time acquisition of cooling liquid temperature by the temperature monitoring module, the central control unit can automatically trigger the reversing valve control instruction and adjust the opening of the proportional regulating valve according to the pre-defined temperature control interval. This dynamic flow regulation mechanism can respond to the heat load change of the server in real time, quickly increase the flow of cooling liquid to strengthen heat dissipation when the equipment temperature rises, and reduce the flow to reduce cooling waste when the heat dissipation requirement is low, realizing intelligent heat dissipation based on PUE optimization and avoiding local overheating problems.

[0032] Third, energy saving: instead of increasing the power of the pump as a whole to ensure the flow of the remote equipment, the accurate flow distribution and dynamic regulation reduce unnecessary energy consumption of the circulating pump while meeting the heat dissipation requirements of all target heat dissipation equipment. At the same time, the low-flow energy-saving heat dissipation mode under low heat dissipation requirement condition further reduces the system energy consumption and improves the overall energy utilization efficiency of the data center. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to make the content of the application more easily understood, the application will be further described in detail below according to specific embodiments of the application and in conjunction with the drawings, in which,

[0034] Figure 1 is a liquid cooling distribution device structure schematic diagram provided in an embodiment of the application;

[0035] Figure 2 is a specific structure schematic diagram of a liquid cooling distribution device provided in an embodiment of the application;

[0036] Figure 3 is a flowchart of a liquid cooling control method provided in an embodiment of the application;

[0037] DESCRIPTION OF DRAWINGS

[0038] 1, main liquid supply header; 2, flow regulating component; 21, proportional regulating valve; 3, multi-channel distribution component; 31, distributor; 311, parallel branch; 32, reversing valve; 33, liquid outlet node; 4, cooling medium delivery pipeline; 5, central control unit; 6, cooling liquid supply equipment; 7, distributed control unit; 8, temperature monitoring module; 9, flow sensor; 100, target heat dissipation equipment. DETAILED DESCRIPTION

[0039] The application will be further described below with reference to the drawings and specific embodiments, so that those skilled in the art can better understand the application and implement it, but the embodiments are not limiting to the application.

[0040] Embodiment one:

[0041] Referring to Figure 1 and Figure 2 , the application provides a liquid cooling distribution device, which comprises a main liquid supply header 1, a flow regulating assembly 2, a multi-channel distribution assembly 3, a plurality of cooling medium conveying pipelines 4, and a central control unit 5. The device realizes precise distribution of cooling liquid through hierarchical flow regulation and intelligent control. Among them,

[0042] The flow regulating assembly 2 comprises at least a plurality of proportional regulating valves 21 connected in parallel to the main liquid supply header 1, and the proportional regulating valves are configured to dynamically adjust the flow of cooling liquid;

[0043] The multi-channel distribution assembly 3 comprises a plurality of groups of flow-regulatable distributors 31, a plurality of reversing valves 32, and a plurality of liquid outlet nodes 33, the distributors 31 are connected one by one to the proportional regulating valves 21, each group of distributors 31 is provided with a plurality of parallel branches 311, and each parallel branch 311 is connected to one liquid outlet node 33 through the reversing valve 32;

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

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

[0046] Among them, the number of parallel branches 311 matches the number of target heat dissipation devices 100, and the multi-channel distribution assembly 3 is configured to dynamically adjust the distribution path through the switching of the reversing valve 32.

[0047] From the above technical solution, it can be known that the application adjusts the total flow of the main liquid supply header 1 by the proportional regulating valve 21 for primary coarse adjustment, and then adjusts it by the distributor 31 and the reversing valve 32 of the multi-channel distribution assembly 3 for secondary fine adjustment. The plurality of parallel branches 311 of each group of distributors 31 can select different flow specifications of the distribution path (such as large, medium, and small flow distributors) through the reversing valve 32 according to the position and resistance characteristics of the target heat dissipation device 100, so as to realize precise flow proportioning. Among them, the flow regulating range of the distributor 31 is 0 to the maximum output flow of the liquid cooling distribution device, supports ≥2 groups of differential flow specification distributors in parallel, and meets the flow compensation needs of different resistance pipelines.

[0048] Take the server and other equipment in the computer room as the target heat dissipation device 100 as an example. Figure 2 As shown, the multi-channel liquid separation assembly 3 includes two groups of flow-adjustable liquid separators 31, multiple reversing valves 32, and multiple liquid outlet nodes 33. The liquid separators 31 are connected one-to-one with the proportional control valves 21. Each group of liquid separators 31 is provided with multiple parallel branches 311, each parallel branch 311 is connected to a reversing valve 32, and each reversing valve 32 is connected to a liquid outlet node 33. The two groups of liquid separators 31 are respectively connected to liquid separation channels with different flow specifications.

[0049] Furthermore, in this embodiment, the liquid cooling distribution device also includes a coolant supply unit 6 (CDU), which is connected to the main liquid supply manifold 1. For target cooling devices 100 that are farther away from the coolant supply unit 6 or have greater resistance, the central control unit 5 increases the opening of the corresponding proportional control valve 21 to 60%-100% and switches to a larger flow distribution path (such as a channel with a pipe diameter ≥ DN25 in the parallel branch 311). This compensates for flow attenuation caused by pipe resistance with a compensation accuracy of ≤±5%, ensuring balanced coolant distribution across all devices.

[0050] For liquid cooling systems with a wide coverage area and a large number of branches (such as a multi-computer room layout in a large data center), the liquid cooling distribution device also includes multiple distributed control units 7, which are connected to the central control unit 5 via a bus and are 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 (for example, one control unit per cabinet group), flexibly adapting to the system's physical expansion needs and avoiding signal attenuation or delay caused by the long communication distance of 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 global 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 switching of a single valve and fine-tuning of the flow, to avoid performance bottlenecks in the central control unit 5 due to processing massive underlying data.

[0052] The distributed control unit 7 can preliminarily filter and process the local sensor data (such as flow, temperature), and only transmit key information (such as abnormal warning, adjustment result) to the central control unit 5, reduce the communication bandwidth occupation, and improve the overall stability of the system. When the heat dissipation demand of any parallel branch 311 suddenly changes (such as the load of a certain server suddenly increases), the nearby distributed control unit 7 immediately performs adjustment action (such as switching the distribution path of the reversing valve 32 or adjusting the opening of the proportional regulating valve 21), realizes "local problem local solution", and improves the response efficiency of the system to local working condition changes.

[0053] When a certain distributed control unit 7 or the branch controlled by it fails (such as the reversing valve 32 is stuck), the failure only affects the 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 the control of the fault area (such as increasing the opening of the corresponding proportional regulating valve 21 to compensate the flow), so as to avoid that the single point failure causes the system to be paralyzed.

[0054] In addition, in the embodiment, the liquid cooling distribution device further comprises a plurality of temperature monitoring modules 8 connected to the distributed control unit 7, and the temperature monitoring modules 8 are connected to the cooling liquid supply equipment 6 and the cooling liquid outlet port of the target heat dissipation equipment 100.

[0055] By simultaneously monitoring the supply liquid temperature of the cooling liquid supply equipment 6 and the outlet liquid temperature of the target heat dissipation equipment 100, the temperature control of the whole process of the cooling liquid circulation is realized. Both the initial supply liquid state and the temperature rise of the cooling liquid after heat exchange in the equipment can be known, so as to provide complete temperature data chain for the central control unit 5 and avoid information blind area.

[0056] Based on the temperature data at both ends, the central control unit 5 can accurately calculate the actual heat exchange amount of the cooling liquid in the target heat dissipation equipment 100, and then judge the current heat load of the equipment. If the outlet liquid temperature is too high, the proportional regulating valve 21 is quickly adjusted to increase the flow, and the reversing valve 32 is switched to the large-flow distribution path; when the temperature is low, the flow is reduced, so as to realize on-demand cooling, avoid waste of cooling capacity, and improve the overall heat dissipation efficiency.

[0057] Further, the liquid cooling distribution device further comprises a plurality of flow sensors 9 arranged between the reversing valve 32 and the outlet node 33 on each parallel branch 311, and connected to the distributed control unit 7.

[0058] The flow sensor 9 is arranged on the parallel branch 311 of the liquid cooling distribution device, which can monitor the cooling liquid flow of each branch in real time and provide accurate flow data feedback for the system. By installing the flow sensor 9 between the reversing valve 32 and the liquid outlet node 33, the turbulence disturbance during valve switching can be effectively avoided, ensuring the measurement accuracy. These data are transmitted to the central control unit 5 through the distributed control unit 7, and combined with the data feedback from the temperature monitoring module 8, the central control unit 5 can accurately calculate the actual demand of each target heat dissipation device, dynamically adjust the opening degree of the proportional regulating valve 21 and the passage of the reversing valve 32, realize the accurate distribution of the cooling liquid flow, meet the heat dissipation demand of high-load devices, and intelligently save energy in low-power state.

[0059] At the same time, the flow anomaly detection function can timely alarm pipeline blockage, valve failure or leakage and other problems, which is more forward-looking than the traditional temperature feedback mechanism, greatly improving the system reliability and maintenance efficiency. The closed-loop design of "monitoring-decision-execution" enables the liquid cooling system to maintain efficient and stable operation under complex working conditions, providing an innovative solution for thermal management in data centers, new energy vehicles and other fields.

[0060] Based on the feedback results of the flow sensor 9, the central control unit 5 can dynamically adjust the power of the pump. In low heat dissipation demand working condition, the pump speed is reduced to reduce the flow, avoiding the waste of energy consumption caused by maintaining high flow; in high load, the flow is accurately distributed, without blindly increasing the overall pump power, realizing on-demand liquid supply, reducing the system operation energy consumption, and improving the energy utilization efficiency of data center.

[0061] Specifically, in the embodiment, the connecting pipeline between the proportional regulating valve 21 and the liquid distributor 31 is a pressure-bearing pipeline, the pressure-bearing capacity of the pressure-bearing pipeline is not less than a preset pressure threshold, and the preset pressure threshold is determined based on the system working pressure of the liquid cooling distribution device. Preferably, the connecting pipeline is a stainless steel hard pipe or a high-pressure hose, and the pressure-bearing capacity is not less than 1.6 MPa.

[0062] Further, the cooling medium conveying pipeline 4 adopts a high-thermal-conductivity metal pipe or a reinforced polymer hose, the inlet end thereof is connected to the corresponding liquid outlet node 33 through a flange or a quick plug joint, and the outlet end is coupled with the cold plate channel of the target heat dissipation device 100 through a standard hydraulic interface.

[0063] In addition, the liquid cooling distribution device provided by the embodiment is not limited to be used on the liquid cooling distribution unit (CDU), can be widely applied to industrial systems requiring high-precision fluid distribution, supports an ISO6162 standard hydraulic interface (DN6-DN50 pipe diameter), is compatible with a pressure environment of 0.5-2.5 MPa, accesses a DCS / PLC system through a Modbus / TCP protocol and the like, and is suitable for scenarios such as data center heat dissipation, industrial process temperature control, new energy battery thermal management and the like. When the reversing valve 32 fails, the central control unit 5 can automatically increase the opening degree of the proportional adjusting valve 21 of the corresponding distributor 31, maintain the flow of the fault branch, and ensure continuous operation of the system.

[0064] Embodiment two

[0065] Based on the same inventive concept as that of embodiment one, the application further provides a liquid cooling heat dissipation device, which comprises the liquid cooling distribution device described in embodiment one, and dynamically adjusts the distribution path and flow of the cooling liquid through the liquid cooling distribution device according to the heat dissipation requirement of the target heat dissipation device 100.

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

[0067] The device adopts an edge computing architecture, the total control unit is internally provided with an adaptive thermal management algorithm, can dynamically adjust the opening degree of the proportional adjusting valve 21 and the passage of the reversing valve 32 of the liquid cooling distribution device according to real-time thermal load data, realizes millisecond-level linkage response of the cooling liquid flow and the power consumption of the IT device, and maps the physical heat dissipation system to a virtual management space through the construction of a digital twin model, and supports visual heat flow distribution monitoring and optimization.

[0068] At the system integration level, the standardized interface based on the Redfish protocol supports seamless connection with a data center infrastructure management (DCIM) platform, realizes unified management of the heat dissipation system and infrastructure such as power supply and distribution, network equipment and the like. The operation and maintenance personnel can complete device state monitoring, parameter configuration, energy efficiency analysis and the like through a single operation interface of the DCIM platform, effectively improves the intelligent operation and maintenance level of the data center.

[0069] Embodiment three

[0070] The application further provides a liquid cooling control method applied to the liquid cooling heat dissipation device described in embodiment two. As shown in Figure 3 The liquid cooling control method comprises the following steps:

[0071] S1: Establish a temperature-flow mapping model according to the heat dissipation requirement characteristics of the target heat dissipation device 100, which includes the correspondence between multiple temperature control intervals and the parameters of the distribution passage;

[0072] S2: Real-time acquisition of the cooling liquid temperature parameter flowing through the target heat dissipation device 100, and determination of the temperature control interval in which the cooling liquid temperature parameter is located;

[0073] S3: Based on the temperature-flow mapping model, generate corresponding switching control instructions and flow regulation instructions, switch to the distribution passage with adaptive flow specification and dynamically adjust the total flow of the cooling liquid, so that the cooling liquid temperature parameter tends to the target set value; Specifically, according to the temperature interval division, trigger the corresponding switching valve 32 control instruction, switch to the distribution passage with adaptive flow specification, and simultaneously dynamically adjust the opening of the proportional regulating valve 21 according to the heat exchange requirement, control the total flow of the distributor 31, so as to realize the rapid convergence of the cooling liquid temperature to the target set value, or maintain the low-flow energy-saving heat dissipation mode under low heat dissipation requirement conditions;

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

[0075] Specifically, in step S1, according to the heat dissipation requirement characteristics of the target heat dissipation device 100, a temperature-flow mapping model is established, which clearly defines the correspondence between multiple temperature control intervals and the parameters of the distribution passage (including pipe diameter, length and flow specification). At the same time, the central control unit 5 uses machine learning algorithm to dynamically optimize the temperature control interval based on historical temperature data and device load variation law. For example, during the high load period of the device, the temperature control interval is reduced to improve the heat dissipation response speed; during the low load period, the interval range is relaxed to reduce the valve action frequency and reduce the device loss and energy consumption.

[0076] Further, in step S3, according to the temperature-flow mapping model, switching control instructions and flow regulation instructions are generated to realize cooling liquid flow regulation, which specifically includes the following steps:

[0077] When the cooling liquid temperature parameter is higher than the first preset temperature, the fast heat dissipation mode is triggered, the switching valve 32 is switched to the distribution passage with the maximum flow specification, and the total flow of the cooling liquid is adjusted to the first preset value;

[0078] when the coolant temperature parameter is lower than the second preset temperature, triggering an energy-saving mode, switching to the minimum flow specification of the distribution passage by the reversing valve 32 and adjusting the total coolant flow to a 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;

[0079] when the coolant temperature parameter is between the first preset temperature and the second preset temperature, triggering a dynamic adjustment mode, calculating the optimal distribution passage and the total coolant flow based on the temperature-flow mapping model;

[0080] wherein 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 the above temperature interval control of the reversing valve 32 and the proportional regulating valve 21, a multi-stage flow control strategy is introduced:

[0082] When the temperature is in the mild deviation interval, the opening of the proportional regulating valve 21 is preferentially fine-tuned for small amplitude flow adjustment; if the temperature deviation continues to increase and exceeds the set range, the reversing valve 32 is quickly switched to the distribution passage of the appropriate flow specification, and the opening of the proportional regulating valve 21 is simultaneously adjusted greatly, realizing the stepwise precise control of the coolant flow and ensuring the efficient convergence of the coolant temperature to the target set value.

[0083] Further, the liquid cooling control method further comprises S5: for actively adapting the valve mechanical response characteristics, using a PWM-like signal to modulate the flow adjustment instruction, generating a duty cycle adjustable on-off control signal to control the working state of the reversing valve 32, realizing fine adjustment of the supply flow, and the fine adjustment flow precision is less than a preset flow threshold.

[0084] Specifically, the distributed controller 7 modulates the flow adjustment instruction by using a PWM-like signal, which can not only realize fine control of the supply flow (with a precision less than a preset threshold) through duty cycle adjustment, but also can flexibly adjust the modulation frequency according to the physical mechanism response characteristics of the reversing valve 32, avoiding the valve response deficiency or mechanical wear caused by traditional PWM high-frequency signals; at the same time, the optimized modulation strategy can reduce the instantaneous current impact of the coil drive, and support circuit load balancing when multiple control is concurrent, significantly improving the control accuracy, reliability and actuator service life of the system, especially suitable for scenarios in the liquid cooling system that require high flow accuracy and consider hardware cost and stability.

[0085] In the entire cooling process, if the temperature of any target heat dissipation device 100 continuously exceeds the upper limit of the set interval, and the flow rate has been adjusted to the maximum and still cannot effectively cool down, or the temperature monitoring module 8, flow sensor 9, and other key components fail to obtain abnormal data, the central control unit 5 immediately issues an alarm and starts an adaptive compensation mechanism according to the fault type. For example, automatically switch to a backup monitoring module to obtain data, or estimate and maintain a reasonable cooling liquid flow rate based on historical data and the operating state of other devices to ensure the basic operating function of the heat dissipation system until the fault is eliminated.

[0086] Obviously, the above embodiments are merely examples for the sake of clarity, and are not limiting of the embodiments. Based on the above description, those of ordinary skill in the art can make other different forms of changes or variations. Here, it is not necessary and impossible to exhaust all embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A liquid cooling distribution device, characterized in that: include: Main liquid supply manifold; a flow regulating assembly, the flow regulating assembly comprising a plurality of proportional regulating valves connected in parallel to the main liquid supply manifold, the proportional regulating valves being configured to dynamically adjust the coolant flow; A multi-channel liquid separation component, comprising multiple groups of flow-adjustable liquid separators, multiple reversing valves, and multiple liquid outlet nodes. The liquid separators are connected to the proportional regulating valves in a one-to-one correspondence. Each group of liquid separators is provided with multiple parallel branches, each of which is connected to a liquid outlet node through the reversing valve. Multiple cooling medium delivery pipelines, each cooling medium delivery pipeline having an input end connected to one of the liquid outlet nodes and an 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 the parallel branches matches the number of the target heat dissipation devices, and the multi-channel liquid separation component is configured to achieve dynamic adjustment of the liquid separation path by switching the reversing valve.

2. The liquid cooling distribution device according to claim 1, characterized in that: The liquid cooling distribution device further includes a cooling liquid supply device, and the cooling liquid supply device is connected to the main liquid supply manifold.

3. The liquid cooling distribution device according to claim 2, characterized in that: The liquid cooling distribution device further includes a plurality of distributed control units, which are communicatively connected to the central control unit and are configured to independently control at least one of the reversing valves.

4. The liquid cooling distribution device according to claim 3, characterized in that: The liquid cooling distribution device further includes a plurality of temperature monitoring modules, which are connected to the distributed control unit and are respectively connected to the cooling liquid supply device and the target heat dissipation device.

5. The liquid cooling distribution device according to claim 3, characterized in that: The liquid cooling distribution device further includes a plurality of flow sensors, which are arranged between the reversing valve and the liquid outlet node on each parallel branch and are connected to the distributed control unit.

6. The liquid cooling distribution device according to claim 1, characterized in that: The connecting pipeline between the proportional control valve and the liquid 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 cooling distribution device.

7. A liquid cooling device, characterized in that: It comprises the liquid cooling distribution device according to any one of claims 1 to 6, and dynamically adjusts the distribution path and flow rate of the cooling liquid through the liquid cooling distribution device according to the heat dissipation requirements of the target heat dissipation device.

8. A liquid cooling control method, characterized in that: Applied to the liquid cooling heat dissipation device according to claim 7, the liquid cooling control method comprises the following steps: S1: establishing a temperature-flow mapping model according to the heat dissipation requirement characteristics of the target heat dissipation device, wherein the mapping model includes a correspondence between multiple temperature control intervals and liquid dispensing path parameters; S2: acquiring a temperature parameter of a coolant flowing through a target heat dissipation device in real time, and determining a temperature control range in which the temperature parameter of the coolant falls; S3: Based on the temperature-flow mapping model, corresponding reversing control instructions and flow regulation instructions are generated, switching to the liquid distribution path adapted to the flow specification and dynamically adjusting the total coolant flow rate so that the coolant temperature parameter approaches 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 modified. When the distance parameter is greater than a preset threshold, the liquid distribution path with a larger flow specification is preferentially allocated. The liquid separation passage parameters include the pipe diameter, length and flow rate specifications of the liquid separation passage.

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

10. The liquid cooling control method according to claim 8, characterized in that: The liquid cooling control method also includes: S5: using a PWM-like signal to modulate the flow regulation instruction to generate an on-off control signal with an adjustable duty cycle, controlling the working state of the flow regulation device, and realizing fine adjustment of the liquid supply flow, wherein the flow accuracy of the fine adjustment is less than a preset flow threshold.

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