Cabinet liquid cooling branch differential pressure coordinated regulation system

Abstract

This application belongs to the field of liquid cooling heat dissipation control technology for data processing equipment, and discloses a cabinet liquid cooling branch differential pressure collaborative adjustment system; including: an observation module to collect target branch operating data and obtain observation results; an analysis module to call the normal flow reference relationship and combine it with the differential pressure deviation of non-target branches to obtain differential pressure reference results; an identification module to identify suspected misjudgment results of differential pressure; an attribution module to perform flow response confirmation and obtain resistance attribution results when suspected abnormality occurs; and an adjustment module to generate collaborative adjustment instructions accordingly. This application can improve the accuracy of cabinet liquid cooling branch differential pressure judgment and the stability of collaborative adjustment, and reduce the risk of pump pressure misadjustment, valve misadjustment and local insufficient cooling caused by branch differential pressure misjudgment.

Description

Technical Field

[0001] This application relates to the field of liquid cooling heat dissipation control technology for data processing equipment, and more specifically, to a cabinet liquid cooling branch differential pressure coordinated adjustment system. Background Technology

[0002] As server rack power density continues to increase, liquid cooling systems are increasingly used to dissipate heat from servers, cold plates, and related heat-generating components. A typical server rack liquid cooling system includes a liquid cooling pump, a main supply pipe, a main return pipe, and multiple liquid cooling branches. Each branch connects to the corresponding server within the rack via quick-connect fittings, branch piping, cold plates, and regulating valves to form a heat exchange path. To ensure stable cooling distribution across different branches, the liquid cooling controller typically collects operational information such as branch inlet pressure, branch outlet pressure, valve opening, supply liquid temperature, outlet liquid temperature, and server power consumption. It then adjusts the liquid cooling pump output or the branch regulating valve opening based on changes in branch pressure differentials.

[0003] In existing cabinet liquid cooling control methods, branch pressure differential is often considered an important indicator of branch flow status or cooling demand. When the pressure differential of a liquid cooling branch abnormally increases or fluctuates, the control system tends to interpret it as a change in branch flow state, cooling load, or system pressure fluctuation, and adjusts pump output or valve opening accordingly. During actual cabinet operation and maintenance, quick-connect fittings, as frequently plugged-in and maintained connection components in liquid cooling branches, may experience increased flow resistance even without detectable leaks due to improper locking, compressed sealing rings, insufficient rebound of the connector core, or localized foreign matter adhesion. In this case, the branch may still appear leak-free, but the local resistance of the fluid passing through the quick-connect fitting has deviated from the normal connection state.

[0004] In the aforementioned scenarios, existing control methods are prone to misinterpreting branch pressure differential changes caused by abnormal flow resistance in quick-connect fittings (even without leaks) as normal branch pressure differential abnormalities or actual cooling demand changes. This is especially problematic when multiple liquid-cooled branches share the same main supply and return lines within the same cabinet. The target branch pressure differential is further influenced by the liquid-cooling pump output, main line pressure disturbances, and the adjustment status of adjacent branches, making it difficult to distinguish pressure differential deviations caused by abnormal local flow resistance in quick-connect fittings from normal pressure fluctuations. If the control system directly uses this abnormal pressure differential as the overall cabinet pump pressure target or branch valve adjustment, it may lead to an erroneous increase in liquid-cooling pump output, incorrect correction of adjacent normal branches, or incorrect handling of the target branch according to conventional pressure differential logic even when actual flow is limited. Therefore, the main problem with existing technology is that when quick-connect fittings are not leaking but generate abnormal local flow resistance, branch pressure differentials are easily misjudged as the basis for conventional pressure differential adjustment, leading to deviations in the object and direction of coordinated adjustment of cabinet liquid-cooled branch pressure differentials.

[0005] In view of this, this application proposes a cabinet liquid cooling branch differential pressure coordination regulation system to solve the above problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this application aims to provide a cabinet liquid cooling branch differential pressure collaborative adjustment system. This system collects target branch operating data, establishes and calls upon the normal flow reference relationship of the branch, and identifies suspected misjudgments of differential pressure by combining common pressure disturbance analysis. When suspected non-leakage differential pressure misjudgments or suspected differential pressure anomalies occur due to unavailability of common source correction, it performs flow response confirmation and local flow resistance attribution. Based on the attribution results, it performs differential pressure collaborative adjustment. This achieves the effect of reducing the erroneous influence of abnormal differential pressure in the target branch on the adjustment of valves in both target and non-target branches of the entire cabinet pump pressure when there is no leakage at the quick-connect fitting but abnormal flow resistance exists. This improves the accuracy of differential pressure judgment and the stability of collaborative adjustment in the cabinet liquid cooling branch.

[0007] This application provides the following technical solution: a cabinet liquid cooling branch differential pressure coordinated regulation system, including: The observation module collects target branch operation data and generates target branch observation results based on the target branch operation data. The analysis module establishes and calls the normal flow reference relationship of the branch, analyzes the current reference result of the target branch in combination with the observation results of the target branch, analyzes the pressure difference deviation of the target branch based on the current reference result and the observation results of the target branch, and performs common pressure disturbance analysis based on the pressure difference deviation and the pressure difference deviation of non-target branches under the same supply and return liquid main to obtain the pressure difference reference result of the target branch. The identification module generates suspected misjudgment results of pressure difference based on the observation results of the target branch and the reference results of the pressure difference of the target branch; The attribution module performs flow response confirmation on the target branch when the suspected differential pressure misjudgment result is a suspected non-leakage differential pressure misjudgment or a suspected differential pressure abnormality under the condition that common source correction is unavailable. It obtains the confirmed target branch observation results and the confirmed baseline results. Based on the target branch observation results, the confirmed target branch observation results, the current baseline results, and the confirmed baseline results, it analyzes and obtains the target branch resistance attribution results. The adjustment module, based on the suspected misjudgment of differential pressure and in conjunction with the target branch resistance attribution result, determines whether the differential pressure of the target branch is involved in the calculation of the overall pump pressure target, and generates the target branch regulating valve opening command, liquid cooling pump output command, and non-target branch regulating valve correction command to obtain the coordinated adjustment command.

[0008] The technical effects and advantages of the cabinet liquid-cooled branch differential pressure coordinated regulation system in this application are as follows: By collecting target branch operation data and obtaining target branch observation results, the liquid cooling controller no longer adjusts based solely on the differential pressure of a single branch. Instead, it incorporates the differential pressure status, thermal response status, leakage status, and quick-connect status of the target branch into the same judgment chain, providing a data basis for distinguishing between ordinary differential pressure fluctuations, leakage risks, and non-leakage flow resistance anomalies.

[0009] By establishing and calling the normal flow reference relationship of the branch, and combining the observation results of the target branch to obtain the current reference result, the current operating state of the target branch can be compared with its normal flow state under the same liquid cooling pump output and branch regulating valve opening. Furthermore, by performing common pressure disturbance analysis on the pressure difference deviation of non-target branches under the same supply and return liquid main, the influence of common factors such as liquid cooling pump output fluctuation and main pipeline pressure disturbance on the judgment of target branch pressure difference can be weakened, thereby reducing the probability of misjudging common source pressure fluctuation as target branch abnormality.

[0010] By identifying suspected misjudgments of differential pressure based on the observation results of the target branch and the reference results of the differential pressure of the target branch, it is possible to distinguish different states such as normal differential pressure availability, leakage risk, suspected non-leakage differential pressure misjudgment, suspected differential pressure abnormality under common source correction unavailability, and reference unavailability before performing coordinated regulation. This avoids directly using the abnormal differential pressure of the target branch in the calculation of the pump pressure target of the whole cabinet when the source of the abnormality is not yet clear.

[0011] By performing flow response confirmation on the target branch under suspected non-leakage differential pressure misjudgment or when common source correction is unavailable, and combining the target branch observation results before and after confirmation, the current baseline results, and the baseline results after confirmation, it is possible to further determine whether the abnormal pressure difference of the target branch is accompanied by deviations in flow response and thermal response. This allows for the priority attribution of short-term operating condition disturbances, abnormal pressure sampling, abnormal local flow resistance of non-leakage branches, and abnormal flow resistance of quick-connect fittings.

[0012] By performing differential pressure coordinated adjustment based on the suspected misjudgment results and the target branch resistance attribution results, it is possible to limit the erroneous pull of abnormal differential pressure in the target branch on the overall cabinet pump pressure target and non-target branch valve adjustment when it is confirmed that there is a non-leakage branch local flow resistance abnormality or quick connector flow resistance abnormality is the primary cause. This avoids the liquid cooling pump being mistakenly pressurized, adjacent normal branches being mistakenly corrected, or the target branch cooling demand being incorrectly judged due to the quick connector not leaking but having abnormal flow resistance.

[0013] In summary, this application can improve the accuracy of differential pressure judgment and the stability of coordinated adjustment in the cabinet liquid cooling branch when there is no leakage in the quick connector but abnormal flow resistance, and reduce the risk of pump pressure misadjustment, valve misadjustment and insufficient local cooling caused by branch differential pressure misjudgment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the differential pressure regulation system for the liquid cooling branch of the cabinet in this application; Figure 2 This is a schematic diagram of the method for obtaining the reference result of the target branch pressure difference in this application; Figure 3 This is a flowchart illustrating the method for obtaining the attribution results of the target branch resistance in this application. Figure 4 This is a schematic diagram of the method for obtaining the coordinated regulation instruction in this application. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] Example 1: Please see Figure 1 As shown, this embodiment provides a cabinet liquid cooling branch differential pressure coordinated regulation system, including: The observation module collects the target branch's operational data and generates the target branch's observation results based on the target branch's operational data.

[0017] In specific implementations, the methods for obtaining the observation results of the target branch include: During the current liquid cooling control cycle, the target branch operation data is collected. The target branch operation data includes the branch inlet pressure, branch outlet pressure, liquid cooling pump output status, branch regulating valve opening, liquid supply temperature, branch outlet temperature, corresponding server power consumption, leakage status signal, and quick connector status information.

[0018] The branch inlet pressure is acquired by the target branch inlet pressure acquisition point; the branch outlet pressure is acquired by the target branch outlet pressure acquisition point; the liquid cooling pump output status is obtained by feedback from the liquid cooling pump controller; the branch regulating valve opening is obtained by feedback from the branch regulating valve controller; the liquid supply temperature is acquired by the liquid supply main pipe temperature sensor or the target branch inlet temperature sensor; the branch outlet temperature is acquired by the target branch outlet temperature sensor; the server power consumption is acquired by the server baseboard management controller, power management module, or external power consumption acquisition module; the leakage status signal is acquired by the leakage detection line, leakage sensor, or liquid cooling controller leakage detection interface.

[0019] When the target branch corresponds to one server, the power consumption of the corresponding server is the power consumption of the server corresponding to the target branch; when the target branch corresponds to multiple servers or multiple cold plate loads, the power consumption of the corresponding server is the sum of the power consumption of all servers or cold plate loads connected to the target branch at the same data alignment time; if any power consumption sampling value participating in the aggregation is invalid, the power consumption aggregation value is not used to calculate the thermal response value of the current branch.

[0020] Calculate the difference between the inlet pressure and outlet pressure of the target branch to obtain the measured branch pressure difference.

[0021] The difference between the outlet temperature and supply temperature of the target branch is calculated and divided by the corresponding server power consumption to obtain the branch thermal response value of the target branch; in one possible implementation, the formula for calculating the thermal response value of the current branch is: ;in, For the first The current thermal response value of the target branch; For the first The outlet temperature of the target branch; For the liquid supply temperature; For the first The corresponding server power consumption of each target branch; the branch thermal response value is used to characterize the coolant temperature rise response of the target branch under the current power consumption, and is used to assist in judging the flow status of the branch; when the corresponding server power consumption is less than or equal to the minimum effective power consumption threshold, the branch thermal response value is not calculated, nor is the branch thermal response value used in the judgment of abnormal local flow resistance of the branch; the minimum effective power consumption threshold is determined based on the minimum effective reading of the corresponding power consumption acquisition module, the allowable absolute measurement error, and the effective lower limit of power consumption configured by the liquid cooling controller, and the power consumption value with the largest value is taken; the minimum effective reading of the power consumption acquisition module comes from the datasheet or metrological calibration record of the server baseboard management controller, power management module, or external power consumption acquisition module.

[0022] If the refresh cycles of pressure, temperature, valve opening, and power consumption data are different, the determination time of the current liquid cooling control cycle is used as the data alignment time, and the most recent valid sampled value before the data alignment time is selected as the current sampled value. The valid sampled value refers to the sampled value that has not been marked by the liquid cooling controller as communication loss, over-range, sensor failure, or verification failure. If the time interval between the most recent valid sampled value and the data alignment time is greater than twice the refresh cycle of the corresponding acquisition module, or greater than the maximum effective lag time configured by the liquid cooling controller, the sampled value is not used as the current sampled value, and a corresponding sampling anomaly mark is generated. The maximum effective lag time is determined according to the refresh cycle of each acquisition module and the liquid cooling control cycle, and is stored in the liquid cooling controller configuration file.

[0023] Quick connector status information includes at least one of the following: quick connector locking confirmation information, quick connector reconnection record, and quick connector maintenance mark. Quick connector locking confirmation information refers to the locking status output by the quick connector locking detection switch, connector positioning detection structure, or liquid cooling controller manual confirmation interface. Quick connector reconnection record refers to the quick connector reconnection event recorded by maintenance personnel in the cabinet maintenance system or liquid cooling controller maintenance interface after disassembly. Quick connector maintenance mark refers to the branch maintenance identifier formed by maintenance personnel in the cabinet maintenance system or liquid cooling controller maintenance interface after completing or discovering quick connector maintenance items. Quick connector maintenance items include at least one of the following: quick connector disassembly / reassembly, sealing ring replacement, locking verification failure, foreign object removal from the connector, or abnormal core rebound record. The quick-connector maintenance mark is only valid from the time the maintenance mark is generated until the manual review is completed. If the target branch is equipped with upstream and downstream pressure sampling points for the quick-connector, the triggering effect of the quick-connector maintenance mark on priority attribution will be removed when the manual review is completed and the pressure difference near the quick-connector does not exceed the deviation threshold of the pressure difference near the quick-connector. If the target branch is not equipped with upstream and downstream pressure sampling points for the quick-connector, the triggering effect of the quick-connector maintenance mark on priority attribution will be removed when the manual lockout review is completed, the leakage risk mark is not generated, and the subsequent flow response confirmation is not determined as the priority attribution of abnormal flow resistance of the quick-connector. The method for setting the deviation threshold of pressure difference near the quick-connector is determined in the generation method of abnormal pressure difference near the quick-connector described later.

[0024] The measured branch differential pressure, liquid cooling pump output status, branch regulating valve opening, branch thermal response value, server power consumption, leakage status signal, and quick connector status information of the target branch are used as the observation results of the target branch.

[0025] The analysis module establishes and calls the normal flow reference relationship of the branch, analyzes the current reference result of the target branch in combination with the observation results of the target branch, analyzes the pressure difference deviation of the target branch based on the current reference result and the observation results of the target branch, and performs common pressure disturbance analysis based on the pressure difference deviation and the pressure difference deviation of non-target branches under the same supply and return liquid main to obtain the pressure difference reference result of the target branch.

[0026] In a specific implementation, refer to Figure 2 Methods for obtaining reference results of target branch pressure differential include: Based on the observation results of the target branch, the normal flow reference relationship of the corresponding branch is invoked, and the reference branch differential pressure, reference thermal response value, original differential pressure deviation, common pressure disturbance correction amount, and current differential pressure deviation of the target branch are obtained according to the normal flow reference relationship. The current reference results include the reference branch differential pressure and reference thermal response value corresponding to the target branch under the current liquid cooling pump output state and the current branch regulating valve opening. The current differential pressure deviation refers to the corrected differential pressure deviation used for the determination of the current liquid cooling control cycle. When the common source correction is available, the current differential pressure deviation is the value of the original differential pressure deviation of the target branch minus the common pressure disturbance correction amount. When the common source correction is not available but the reference is available, the corrected current differential pressure deviation is not generated, and the original differential pressure deviation of the target branch is used as the preliminary judgment object for suspected anomalies.

[0027] The normal flow reference relationship of the branch is not data that automatically exists when the establishment conditions are met. Instead, it is a data relationship established by combining the reference output value of the liquid cooling pump and the reference opening value of the branch regulating valve under the condition that the establishment conditions are met, forming a reference operating point. The reference operating point that has formed an effective reference branch pressure difference constitutes the reference branch pressure difference coverage range. The reference operating point that has formed an effective reference thermal response value constitutes the reference thermal response coverage range. The reference operating point that has not formed an effective reference branch pressure difference does not participate in the subsequent reference branch pressure difference reading or interpolation, and the reference operating point that has not formed an effective reference thermal response value does not participate in the subsequent reference thermal response value reading or interpolation.

[0028] During the commissioning phase, the maintenance and verification phase after the quick connector is reconnected, or the reference update phase after the branch resumes normal operation, the liquid cooling controller determines whether the target branch meets the conditions for establishing the normal flow reference relationship. Each liquid cooling branch in the same cabinet establishes its corresponding normal flow reference relationship according to the above method. When a branch is used as the target branch, the normal flow reference relationship of the branch corresponding to that branch is called. When other branches are used as non-target branches or available common source reference branches, the normal flow reference relationship of the corresponding non-target branch is called.

[0029] The conditions for establishing the normal flow reference relationship of the branch include: First, no leakage risk marker was generated in the target branch. The leakage risk marker is generated when the leakage detection line, leakage sensor, or liquid cooling controller leakage detection interface outputs a leakage trigger status. If the leakage detection module outputs an analog quantity, the leakage trigger judgment value in the leakage detection module specification or installation and commissioning record is used as the leakage trigger threshold. When the analog quantity reaches or exceeds the leakage trigger threshold, a leakage risk marker is generated.

[0030] Second, the quick connector is in a connector state that can be used as a normal reference sample; the quick connector locking confirmation information is in a locking confirmation state, or there is a manual locking verification completion record in the cabinet maintenance system; the quick connector locking confirmation information comes from the quick connector locking detection switch, the connector in place detection structure, or the liquid cooling controller manual confirmation interface; the manual locking verification completion record comes from the cabinet maintenance system or the liquid cooling controller maintenance interface.

[0031] Third, the branch control valve of the target branch meets the valve positioning condition; the valve positioning condition is: the absolute value of the difference between the feedback opening degree of the branch control valve and the target opening degree is not greater than the valve opening position deviation threshold; the valve opening position deviation threshold is determined according to the opening feedback resolution and opening control allowable error in the branch control valve actuator specification, and the larger of the two is taken.

[0032] Fourth, the liquid-cooled pump meets the pump output positioning condition; the pump output positioning condition is: the absolute value of the difference between the feedback output state of the liquid-cooled pump and the target output state is not greater than the pump output positioning deviation threshold; the pump output positioning deviation threshold is determined according to the output feedback resolution and output control allowable error in the liquid-cooled pump controller specification, and the larger of the two is taken.

[0033] Fifth, the pressure acquisition module, temperature acquisition module, and power consumption acquisition module did not generate sampling anomaly flags. Sampling anomaly flags are generated when the acquisition module outputs communication loss, over-range, verification failure, or sensor malfunction. If the acquisition module outputs analog quantities and does not directly output malfunction status, a sampling anomaly flag is generated when the sampled value exceeds the effective measurement range specified in the corresponding acquisition module's specifications.

[0034] The liquid-cooled controller will only allow the current branch to be used as the sampling object for the normal flow reference relationship if all of the above conditions are met. If any condition is not met, the current branch data will not be used to establish or update the normal flow reference relationship of the branch.

[0035] The liquid cooling controller determines the reference operating point based on the reference output value of the liquid cooling pump and the reference opening value of the branch regulating valve.

[0036] The method for determining the reference output value of the liquid cooling pump is as follows: if the liquid cooling pump is a discrete speed control, then each pump output speed allowed in the liquid cooling pump controller configuration file is used as the reference output value of the liquid cooling pump; if the liquid cooling pump is a continuously adjustable control, then the lower limit and upper limit of the liquid cooling pump's allowed output are used as boundaries, and a set of reference output values ​​for the liquid cooling pump is generated based on the reference output step of the liquid cooling pump.

[0037] The lower and upper limits of the liquid-cooled pump's output are derived from the liquid-cooled pump's specifications, the liquid-cooled pump controller configuration file, or the liquid-cooled system commissioning documents. The method for setting the liquid-cooled pump's reference output step is as follows: during the commissioning phase, change the output state of the liquid-cooled pump and record the differential pressure response of each branch. Select the minimum pump output change that ensures at least one branch meets the conditions for establishing the normal flow reference relationship, where the differential pressure change is greater than the allowable measurement error of the pressure sensor. This change must not be less than the minimum output adjustment step allowed by the liquid-cooled pump controller. The minimum output adjustment step allowed by the liquid-cooled pump controller is derived from the liquid-cooled pump controller configuration file or the liquid-cooled pump's specifications.

[0038] The method for determining the reference opening value of the branch control valve is as follows: the lower limit of the allowable opening of the branch control valve and the upper limit of the allowable opening of the branch control valve are used as boundaries, and the set of reference opening values ​​of the branch control valve is generated according to the reference opening step of the branch control valve.

[0039] The lower and upper limits of the permissible opening of the branch control valve are derived from the branch control valve actuator specification, the liquid cooling controller configuration file, or the liquid cooling system commissioning file. The method for setting the reference opening step of the branch control valve is as follows: during the commissioning phase, change the opening of the branch control valve and record the target branch differential pressure response; select the minimum valve opening change that makes the target branch differential pressure change greater than the allowable measurement error of the pressure sensor, and the minimum valve opening change must not be less than the minimum permissible opening step of the branch control valve. The minimum permissible opening step of the branch control valve is derived from the branch control valve actuator specification or the liquid cooling controller configuration file.

[0040] A reference operating point is defined by the combination of any reference output value of the liquid cooling pump and the reference opening value of any branch control valve; each reference operating point corresponds to a liquid cooling pump output state and a branch control valve opening.

[0041] For each reference operating point, the liquid cooling controller adjusts the liquid cooling pump to the reference output value of the liquid cooling pump corresponding to the reference operating point, and adjusts the target branch regulating valve to the reference opening value of the branch regulating valve corresponding to the reference operating point. When the liquid cooling pump meets the pump output condition and the target branch regulating valve meets the valve position condition, the liquid cooling controller waits for the reference sampling holding time, and then collects the target branch inlet pressure, target branch outlet pressure, liquid supply temperature, branch outlet liquid temperature and server power consumption.

[0042] The baseline sampling hold time is determined based on the valve's rated action completion time, pump output response time, pressure acquisition and filtering time, branch liquid transport time, and temperature acquisition response time. The valve's rated action completion time is obtained from the branch control valve actuator specification; the pump output response time is obtained from the liquid-cooled pump specification or liquid-cooled pump controller configuration file; the pressure acquisition and filtering time is obtained from the pressure acquisition module configuration; the branch liquid transport time is determined by dividing the target branch liquid-cooled pipeline's internal volume by the branch's rated flow rate, and the target branch liquid-cooled pipeline's internal volume and rated flow rate are obtained from the liquid-cooling system design documents or installation and commissioning records; the temperature acquisition response time is obtained from the temperature sensor specification or metrological calibration records; the baseline sampling hold time is the sum of the above times.

[0043] For a given reference operating point, the difference between the branch inlet pressure and the branch outlet pressure collected at the reference operating point is determined as the measured branch differential pressure at the reference operating point; the difference between the branch outlet temperature and the supply temperature collected at the reference operating point is divided by the corresponding server power consumption to determine the measured thermal response value at the reference operating point; if the server power consumption is less than or equal to the allowable absolute measurement error of the power consumption acquisition module within the power consumption range, the sampled value is not used to establish the reference thermal response value, but it can still be used to establish the reference branch differential pressure when the pressure sampling is valid.

[0044] The effective sampling number for the same reference operating point shall be no less than three. If the effective sampling number is less than three, the reference operating point shall not be used to form an effective reference quantity. When the establishment conditions are met later, additional sampling shall be carried out until the effective sampling number is no less than three. For multiple effective samplings under the reference output value of the same liquid cooling pump and the reference opening value of the same branch regulating valve, the average value of the measured branch pressure difference and the average value of the measured thermal response value shall be taken as the reference branch pressure difference and reference thermal response value of the reference operating point.

[0045] The difference between the measured branch pressure difference and the reference branch pressure difference at the reference operating point is taken as the pressure difference residual at the reference operating point; the difference between the measured thermal response value and the reference thermal response value at the reference operating point is taken as the thermal response residual at the reference operating point.

[0046] If a certain reference operating point does not form an effective reference branch pressure difference, then the reference operating point shall not be used for subsequent reference branch pressure difference interpolation; if a certain reference operating point does not form an effective reference thermal response value, then the reference operating point shall not be used for subsequent reference thermal response value interpolation.

[0047] In the normal flow reference relationship of the branch, the first opening degree and the second opening degree are the reference opening degree values ​​of the regulating valves of two adjacent branches under the same liquid cooling pump reference output value.

[0048] If the set of reference opening values ​​for branch regulating valves contains and , Greater than ,and and If there is no other branch control valve reference opening value in the target branch control valve reference opening value set, then... As the first opening, As the second opening degree.

[0049] For the same liquid cooling pump reference output value, the difference between the reference branch pressure difference corresponding to the second opening degree and the reference branch pressure difference corresponding to the first opening degree is determined as the reference pressure difference response when changing from the first opening degree to the second opening degree; the difference between the reference thermal response value corresponding to the second opening degree and the reference thermal response value corresponding to the first opening degree is determined as the reference thermal response change when changing from the first opening degree to the second opening degree.

[0050] The reference differential pressure response and reference thermal response changes are saved in correspondence with the reference output value of the same liquid cooling pump, the direction of the same valve opening change, and the amount of the same valve opening change, so that they can be retrieved when confirming the flow response later.

[0051] The coverage range of the normal flow reference relationship of the branch is determined according to the reference quantity to be called; when the reference quantity to be called is the reference branch pressure difference, the coverage range is the combination range of the liquid cooling pump output state and the branch regulating valve opening that has formed an effective reference branch pressure difference; when the reference quantity to be called is the reference thermal response value, the coverage range is the combination range of the liquid cooling pump output state and the branch regulating valve opening that has formed an effective reference thermal response value.

[0052] If the liquid cooling pump is continuously adjustable, the liquid cooling controller will find the adjacent effective reference operating point in the normal flow reference relationship of the branch based on the current output state x of the liquid cooling pump and the current opening degree y of the branch regulating valve.

[0053] When there are four adjacent and valid reference operating points , , and ,and , , , At that time, among them, Not equal to , Not equal to Furthermore, when the reference quantity to be interpolated is the reference branch pressure difference, all four reference operating points involved in the interpolation have formed effective reference branch pressure differences; or when the reference quantity to be interpolated is the reference thermal response value, all four reference operating points involved in the interpolation have formed effective reference thermal response values. The liquid cooling controller determines that the current operating condition is within the coverage range of the normal flow reference relationship of the branch, and uses bilinear interpolation to obtain the reference quantity to be interpolated. If any adjacent reference operating point corresponding to the reference quantity to be interpolated has not formed an effective reference quantity, then no interpolation is performed on the corresponding reference quantity to be interpolated, and a corresponding reference unavailable mark is generated.

[0054] For any reference quantity Z to be interpolated, Z represents the reference branch pressure difference or the reference thermal response value; , , and The reference quantities to be interpolated at each point are denoted as follows: , , and First, interpolation is performed in the direction of the branch regulating valve opening to obtain the first intermediate interpolation value. Second intermediate interpolation quantity .

[0055] Then, along the output direction of the liquid cooling pump, the first intermediate interpolation amount is... Second intermediate interpolation quantity Perform interpolation to obtain the reference quantity to be interpolated under the current operating conditions. .

[0056] When the current liquid coolant pump output state x is equal to a certain liquid coolant pump reference output value Furthermore, the current branch control valve opening y is located at the reference opening value of two adjacent effective branch control valves. and During this period, the liquid cooling controller uses one-dimensional linear interpolation in the direction of the branch regulating valve opening to obtain the reference quantity to be interpolated, and sets the reference operating point. The reference quantity to be interpolated at point is denoted as The baseline operating point The reference quantity to be interpolated at point is denoted as The reference quantity to be interpolated under the current operating condition .

[0057] When the current branch control valve opening y is equal to the reference opening value of a certain branch control valve Furthermore, the current liquid coolant pump output state x is located between two adjacent valid liquid coolant pump reference output values. and During this period, the liquid-cooled controller uses one-dimensional linear interpolation in the output direction of the liquid-cooled pump to obtain the reference quantity to be interpolated, and sets the reference operating point. The reference quantity to be interpolated at point is denoted as The baseline operating point The reference quantity to be interpolated at point is denoted as The reference quantity to be interpolated under the current operating condition .

[0058] When Z is the reference branch pressure difference, the interpolated Z is used as the reference branch pressure difference of the target branch; when Z is the reference thermal response value, the interpolated Z is used as the reference thermal response value of the target branch. If a valid adjacent reference point cannot be formed, or the reference quantity to be called is missing, a reference unavailable mark is generated; after the reference unavailable mark is generated, the normal flow reference relationship of the branch is not used to extrapolate the current operating condition.

[0059] The liquid-cooled controller calculates the difference between the measured differential pressure of the target branch and the differential pressure of the reference branch to obtain the original differential pressure deviation of the target branch. The original differential pressure deviation of the target branch represents the deviation of the current measured differential pressure of the target branch from the normal flow reference differential pressure, and does not include the common pressure disturbance correction.

[0060] The liquid cooling controller identifies available common-source reference branches among the non-target branches, excluding the target branch. A common-source reference branch is a non-target branch connected to the same supply and return main pipes as the target branch and meeting the common-source reference conditions within the current liquid cooling control cycle. The common-source reference conditions include: the non-target branch has not generated a leakage risk flag, a pressure sampling anomaly flag, a non-leakage branch local flow resistance anomaly flag, a quick-connect flow resistance anomaly priority attribution flag, or a reference unavailable flag; the non-target branch is not in the flow response confirmation process; the non-target branch's branch control valve has not generated a flag indicating that it has reached the upper or lower allowable limit; and the current liquid cooling pump output status and the current branch control valve opening of the non-target branch are within the coverage range of the normal flow reference relationship of the non-target branch.

[0061] The valve reaching the upper limit of the allowable opening is generated when the absolute value of the difference between the feedback opening of the branch control valve and the upper limit of the allowable opening is not greater than the valve opening deviation threshold. The valve reaching the lower limit of the allowable opening is generated when the absolute value of the difference between the feedback opening of the branch control valve and the lower limit of the allowable opening is not greater than the valve opening deviation threshold. The valve opening deviation threshold is determined based on the opening feedback resolution and the opening control allowable error in the branch control valve actuator specification, and the larger of the two values ​​is taken.

[0062] The liquid-cooled controller determines one by one whether the non-target branches other than the target branch meet the common source reference conditions; the branches that meet the common source reference conditions are used as available common source reference branches; branches that do not meet any conditions do not participate in the calculation of common pressure disturbance correction; for each available common source reference branch, the liquid-cooled controller obtains the reference branch differential pressure and the original differential pressure deviation of the corresponding common source reference branch.

[0063] The common pressure disturbance correction is used to characterize the common differential pressure deviation caused by fluctuations in the output of the liquid cooling pump, pressure fluctuations in the main pipeline, or common source pressure disturbances under the same supply and return main pipelines. When the number of available common source reference branches is less than two, the common pressure disturbance correction is not calculated, and a common source correction unavailable flag is generated. When the number of available common source reference branches is two, the absolute value of the difference between the two original differential pressure deviations is calculated. If the absolute value of the difference between the two original differential pressure deviations is greater than the differential pressure deviation judgment threshold, a common source correction unavailable flag is generated, and the common pressure disturbance correction is not calculated. If the value is less than or equal to the differential pressure deviation judgment threshold, the average of the two original differential pressure deviations is used as the common pressure disturbance correction amount; when the number of available common source reference branches is greater than two, the median of the original differential pressure deviations after sorting by value is used as the common pressure disturbance correction amount; when the number of sorted original differential pressure deviations is even, the average of the two middle original differential pressure deviations is used as the median; when the number of available common source reference branches is not less than two and no common source correction unavailable mark is generated, the difference between the original differential pressure deviation of the target branch and the common pressure disturbance correction amount is used as the current differential pressure deviation of the target branch.

[0064] The differential pressure deviation judgment threshold is set synchronously when establishing the normal flow reference relationship of the branch. Specifically, when establishing the normal flow reference relationship of the branch, the absolute values ​​of the differential pressure residuals of the target branch at each reference operating point are used to form a normal differential pressure residual set. The maximum value in the normal differential pressure residual set is taken and superimposed with the allowable measurement error of the pressure sensor in the corresponding pressure range, which is used as the differential pressure deviation judgment threshold of the branch. The allowable measurement error of the pressure sensor comes from the pressure sensor specification or metrological calibration record. If the pressure sensor has different allowable measurement errors in different pressure ranges, the corresponding allowable measurement error is selected according to the pressure range of the current branch inlet pressure and branch outlet pressure.

[0065] The liquid-cooled controller uses the target branch reference branch pressure difference, the target branch reference thermal response value, the target branch original pressure difference deviation, the common pressure disturbance correction, the current pressure difference deviation, the reference unavailable flag, the common source correction unavailable flag, and the pressure difference deviation judgment threshold as the target branch pressure difference reference result. When the reference unavailable flag is generated, the current pressure difference deviation is not output. When the common source correction unavailable flag is generated, the common pressure disturbance correction and the current pressure difference deviation are not output. Only the target branch original pressure difference deviation is output for use in the subsequent flow response confirmation step.

[0066] The identification module generates a suspected differential pressure misjudgment result based on the target branch observation results and the target branch differential pressure reference results. The suspected differential pressure misjudgment result includes one of five states: normal differential pressure available, leakage risk, suspected non-leakage differential pressure misjudgment, suspected differential pressure abnormality under common source correction unavailable, and reference unavailable.

[0067] In specific implementations, the method for obtaining suspected misjudgment results of differential pressure includes: The liquid cooling controller determines whether there is a suspected misjudgment of the pressure difference in the target branch based on the reference result of the pressure difference in the target branch.

[0068] If the target branch generates a baseline unavailable flag, the suspected misjudgment result of differential pressure is judged as baseline unavailable. In the baseline unavailable state, the original differential pressure deviation or current differential pressure deviation of the target branch is not used to judge differential pressure misjudgment, and the target branch enters the subsequent conservative cooling control or baseline reconstruction process. The baseline unavailable flag is generated according to the method of obtaining the reference result of differential pressure of the target branch.

[0069] If the target branch does not generate a baseline unusable mark, but generates a leakage risk mark, the suspected misjudgment result of differential pressure will be judged as leakage risk; under the leakage risk state, the local flow resistance attribution judgment of non-leakage branch will not be entered.

[0070] If no baseline unavailable flag, no leakage risk flag, and no common-source correction unavailable flag are generated for the target branch, the liquid cooling controller uses the current differential pressure deviation of the target branch for judgment. If the absolute value of the current differential pressure deviation of the target branch is less than or equal to the differential pressure deviation judgment threshold, the suspected differential pressure misjudgment result is judged as normal differential pressure available. If the absolute value of the current differential pressure deviation of the target branch is greater than the differential pressure deviation judgment threshold, the suspected differential pressure misjudgment result is judged as a suspected non-leakage differential pressure misjudgment.

[0071] A suspected non-leakage differential pressure misjudgment status indicates that after removing the common pressure disturbance correction, the target branch differential pressure still deviates significantly from the normal flow reference relationship, but the risk of leakage has not been triggered. Therefore, it is necessary to proceed to the subsequent flow response confirmation step to further determine whether there is abnormal local flow resistance, abnormal pressure sampling, or short-term operating condition disturbance in the non-leakage branch.

[0072] If the target branch does not generate a baseline unavailable flag or a leakage risk flag, but generates a common-source correction unavailable flag, the liquid cooling controller will not generate a corrected current differential pressure deviation. Instead, it will directly compare the absolute value of the original differential pressure deviation of the target branch with the differential pressure deviation judgment threshold. If the absolute value of the original differential pressure deviation of the target branch is greater than the differential pressure deviation judgment threshold, the suspected differential pressure misjudgment result will be judged as a suspected differential pressure abnormality under common-source correction unavailable. If the absolute value of the original differential pressure deviation of the target branch is less than or equal to the differential pressure deviation judgment threshold, the suspected differential pressure misjudgment result will be judged as normal differential pressure available.

[0073] The suspected pressure difference anomaly state when common source correction is unavailable indicates that there are fewer than two available common source reference branches, or the common pressure disturbance correction amount is unstable and cannot reliably eliminate the common pressure disturbance. Therefore, the local flow resistance anomaly of the non-leakage branch cannot be directly determined based solely on the original pressure difference deviation of the target branch, and it is necessary to proceed to the subsequent flow response confirmation step.

[0074] The attribution module performs flow response confirmation on the target branch when the suspected differential pressure misjudgment result is a suspected non-leakage differential pressure misjudgment or a suspected differential pressure anomaly under the condition that common source correction is unavailable. It obtains the confirmed target branch observation results and the confirmed baseline results. Based on the target branch observation results, the confirmed target branch observation results, the current baseline results, and the confirmed baseline results, it analyzes and obtains the target branch resistance attribution results. The target branch resistance attribution results include one of five states: short-term operating condition disturbance, pressure sampling anomaly, non-leakage branch local flow resistance anomaly, quick-connect flow resistance anomaly preferential attribution, and branch local flow resistance pending confirmation.

[0075] In a specific implementation, refer to Figure 3 Methods for obtaining branch resistance attribution results include: Before performing flow response confirmation, the liquid-cooled controller first performs a verification sampling of the target branch. The verification sampling adopts the same sampling method as the method used to obtain the observation results of the target branch, and recalculates the measured branch differential pressure and the verification branch thermal response value. The liquid-cooled controller re-obtains the verification original differential pressure deviation and the verification current differential pressure deviation according to the method used to obtain the reference results of the target branch differential pressure. If the original differential pressure suspected misjudgment result is a suspected non-leakage differential pressure misjudgment, and the absolute value of the current differential pressure deviation is less than or equal to the differential pressure deviation judgment threshold, then the branch resistance attribution result is judged as a short-term operating condition disturbance. If the original differential pressure suspected misjudgment result is a suspected differential pressure anomaly under the condition that common source correction is unavailable, and the absolute value of the original differential pressure deviation is less than or equal to the differential pressure deviation judgment threshold, then the branch resistance attribution result is also judged as a short-term operating condition disturbance. If the corresponding suspected anomaly conditions are still met after verification, the flow response confirmation continues.

[0076] The liquid cooling controller preferentially performs flow response confirmation by adjusting the target branch regulating valve in the direction of increased flow. The flow confirmation opening is determined as follows: The liquid cooling controller calls the normal flow reference relationship of the target branch, and searches the set of reference opening values ​​of the branch regulating valves for the valve reference opening value that is greater than the current branch regulating valve opening and is the closest valve reference opening value as the target opening value; if the current branch regulating valve opening is exactly equal to a certain valve reference opening value, then the valve reference opening value that is greater than the valve reference opening value and adjacent to the valve reference opening value is taken as the target opening value; if the current branch regulating valve opening value is between two adjacent valve reference opening values, then the valve reference opening value that is greater than the current branch regulating valve opening value and is the closest valve reference opening value is taken as the target opening value, and the difference between the target opening value and the current branch regulating valve opening value is calculated. The value is used as the candidate flow confirmation opening degree; the liquid cooling controller interpolates to obtain the first reference branch pressure difference and the first reference thermal response value under the current liquid cooling pump output state and the current branch control valve opening degree, respectively, and interpolates to obtain the second reference branch pressure difference and the second reference thermal response value under the current liquid cooling pump output state and the target opening degree. The difference between the second reference branch pressure difference and the first reference branch pressure difference is used as the reference pressure difference change corresponding to the candidate flow confirmation opening degree, and the difference between the second reference thermal response value and the first reference thermal response value is used as the reference thermal response change corresponding to the candidate flow confirmation opening degree; the candidate flow confirmation opening degree is not less than the minimum allowable opening execution step of the branch control valve, which is obtained from the branch control valve actuator specification or the liquid cooling controller configuration file.

[0077] The pressure response identification threshold is set to twice the branch differential pressure measurement error. The branch differential pressure measurement error is the sum of the allowable measurement error of the pressure sensor at the target branch inlet and the allowable measurement error of the pressure sensor at the target branch outlet. The allowable measurement error of the pressure sensor is derived from the pressure sensor specification sheet or metrological calibration record. The thermal response change identification threshold is set to twice the thermal response measurement error. thermal response measurement error According to the allowable measurement error of the branch outlet temperature sensor The allowable measurement error of the liquid supply temperature sensor The allowable absolute measurement error of the power consumption acquisition module within the power consumption range used to establish the thermal response reference relationship. Minimum effective power consumption for establishing thermal response reference relationship The maximum absolute value of the difference between the outlet temperature and the supply temperature of the branch in the normal flow reference relationship of the same branch. According to the calculation method, in one possible implementation, the formula for calculating the thermal response measurement error is: ;in, It should be greater than ;when Less than or equal to At that time, the thermal response benchmark relationship is not established using the corresponding power consumption range sample, nor is the power consumption range sample used to perform the abnormal determination of local flow resistance of the branch.

[0078] When the absolute value of the reference differential pressure change corresponding to the candidate flow confirmation opening is greater than the pressure response recognition threshold, and the absolute value of the reference thermal response change corresponding to the candidate flow confirmation opening is greater than the thermal response change recognition threshold, the candidate flow confirmation opening is determined as the flow confirmation opening. If the current branch control valve has reached the upper limit of the allowable opening, or there is no target opening that is greater than the current branch control valve opening and meets the above pressure response and thermal response change requirements, the liquid cooling controller will not forcibly execute the valve opening action, but will determine whether there is the most recent valid valve opening change data.

[0079] The most recent valid valve opening change data refers to a change in the opening of the target branch regulating valve in the direction of increased flow within a preset valid time window before the current judgment time. Both the valve opening feedback before and after the change are valid, and the target branch inlet pressure, target branch outlet pressure, supply liquid temperature, branch outlet liquid temperature, and server power consumption before and after the change are all valid sampled values. The liquid cooling pump output state remains unchanged before and after the change, or the change in the liquid cooling pump feedback output state is not greater than the pump output deviation threshold, and the valve opening change is not less than the minimum allowable opening step of the branch regulating valve. The preset valid time window is determined based on the liquid cooling controller's recording cycle, taking the shorter of the durations of the last five liquid cooling control cycles and ten minutes. If the most recent valid valve opening change data exists, the data before and after the valve opening change will be used as the reference data. The flow response is confirmed using data; if the most recent effective valve opening change data is unavailable, the branch resistance attribution result is determined as branch local flow resistance pending confirmation; when using the most recent effective valve opening change data for flow response confirmation, the data before the corresponding valve opening change is used as the data before flow response confirmation, and the data after the corresponding valve opening change is used as the data after flow response confirmation; the liquid cooling controller obtains the current reference result based on the liquid cooling pump output state before the change and the branch regulating valve opening before the change, and obtains the confirmed reference result based on the liquid cooling pump output state after the change and the branch regulating valve opening after the change; if an effective reference branch pressure difference or effective reference thermal response value cannot be obtained for either the pre-change or post-change operating condition, the corresponding historical valve opening change data is not used for flow response confirmation, and the branch resistance attribution result is determined as branch local flow resistance pending confirmation.

[0080] When a flow confirmation opening exists, the liquid cooling controller adjusts the target branch control valve from its current opening in the direction of increased flow by one minimum opening step, while maintaining the liquid cooling pump output state unchanged and ensuring that the opening of non-target branch control valves does not change synchronously due to this confirmation action. If, during the flow response confirmation process, the change in the liquid cooling pump output state exceeds the pump output deviation threshold, the flow response confirmation is invalid, and the branch resistance attribution result is determined as a branch local flow resistance pending confirmation. If a non-target branch control valve operates due to safety control and affects the common source pressure environment of the target branch, the flow response confirmation is invalid, and the branch resistance attribution result is determined as a branch local flow resistance pending confirmation. Affecting the common source pressure environment of the target branch means that, within the flow response confirmation holding time, the change in the opening of any non-target branch control valve under the same supply and return main pipe is greater than or equal to the minimum allowable opening step of the branch control valve, or the change in the common pressure disturbance correction amount of the available common source reference branch is greater than the differential pressure deviation judgment threshold.

[0081] If the output status of the liquid cooling pump and the status of the non-target branch regulating valve meet the holding requirements, the liquid cooling controller will collect the adjusted data after waiting for the flow response confirmation holding time. The flow response confirmation holding time is determined based on the valve's rated action completion time, pressure acquisition and filtering time, branch liquid transport time, and temperature acquisition response time. The valve's rated action completion time comes from the branch regulating valve actuator specification, the pressure acquisition and filtering time comes from the pressure acquisition module configuration, the branch liquid transport time is determined by dividing the internal volume of the target branch liquid cooling pipeline by the target branch's rated flow rate, the target branch liquid cooling pipeline's internal volume and target branch rated flow rate come from the liquid cooling system design documents or installation and commissioning records, the temperature acquisition response time comes from the temperature sensor specification or metrological calibration records, and the flow response confirmation holding time is the sum of the above times.

[0082] The liquid-cooled controller acquires the measured branch differential pressure of the target branch before flow response confirmation, the reference branch differential pressure of the operating condition, the branch thermal response value, the reference thermal response value of the operating condition, and the server power consumption; and the measured branch differential pressure of the target branch after flow response confirmation, the reference branch differential pressure of the operating condition, the branch thermal response value, the reference thermal response value of the operating condition, and the server power consumption. It calculates the difference between the measured branch differential pressure of the target branch after flow response confirmation and the measured branch differential pressure of the target branch before flow response confirmation to obtain the actual differential pressure response; it calculates the difference between the reference branch differential pressure of the operating condition after flow response confirmation and the reference branch differential pressure of the operating condition before flow response confirmation to obtain the reference differential pressure response; it calculates the difference between the branch thermal response value after flow response confirmation and the branch thermal response value before flow response confirmation to obtain the actual thermal response change; and it calculates the difference between the reference thermal response value of the operating condition after flow response confirmation and the reference thermal response value of the operating condition before flow response confirmation to obtain the reference thermal response change.

[0083] If an effective reference branch pressure difference or an effective reference thermal response value cannot be obtained for the operating conditions before or after flow response confirmation, the branch resistance attribution result will be determined as the branch local flow resistance to be confirmed.

[0084] When the absolute value of the difference between the server power consumption after the current response is confirmed and the server power consumption before the current response is confirmed is less than or equal to the sum of the allowable absolute measurement errors, the server power consumption is determined to meet the condition of comparable power consumption; otherwise, the server power consumption is determined not to meet the condition of comparable power consumption, and the branch resistance attribution result is determined to be the branch local current resistance to be confirmed; the sum of the allowable absolute measurement errors is the sum of the allowable absolute measurement error of the server power consumption before the current response is confirmed and the allowable absolute measurement error of the server power consumption after the current response is confirmed.

[0085] The liquid cooling controller is set with differential pressure response deviation thresholds and thermal response change deviation thresholds. The method for setting the differential pressure response deviation threshold is as follows: When establishing the normal flow reference relationship for a branch, for any two adjacent branch regulating valve reference openings under the same liquid cooling pump output state, obtain multiple effective measured branch differential pressures under the first opening and multiple effective measured branch differential pressures under the second opening. The difference between any effective measured branch differential pressure under the second opening and any effective measured branch differential pressure under the first opening is taken as the measured differential pressure response. The difference between the reference branch differential pressure corresponding to the second opening and the reference branch differential pressure corresponding to the first opening is taken as the reference differential pressure response. The difference between the measured differential pressure response and the reference differential pressure response is taken as the differential pressure response residual. Each differential pressure response residual is... The absolute values ​​of the differential pressure response residuals are used to form a set of differential pressure response residuals. The maximum value in the set is taken and superimposed with the pressure response identifiable threshold to serve as the differential pressure response deviation threshold. The method for setting the thermal response change deviation threshold is as follows: the measured thermal response change, the reference thermal response change, and the thermal response change residuals are obtained in the same way. The absolute values ​​of each thermal response change residual are used to form a set of thermal response change residuals. The maximum value in the set is taken and superimposed with twice the thermal response measurement error to serve as the thermal response change deviation threshold. The number of effective residuals in both the differential pressure response residual set and the thermal response change residual set is not less than three sets. If the number of effective residuals is less than three sets, no corresponding deviation threshold is generated, and when the deviation threshold needs to be used, the branch resistance attribution result is determined as the branch local flow resistance to be confirmed.

[0086] The liquid-cooled controller calculates the deviation of the differential pressure response and the deviation of the thermal response change, respectively. The deviation of the differential pressure response is the absolute value of the difference between the actual differential pressure response and the reference differential pressure response. The deviation of the thermal response change is the absolute value of the difference between the actual thermal response change and the reference thermal response change.

[0087] If the deviation of the differential pressure response is less than or equal to the differential pressure response deviation threshold, and the deviation of the thermal response change is less than or equal to the thermal response change deviation threshold, it indicates that the pressure response and thermal response changes of the target branch in the flow response confirmation are consistent with the normal flow reference relationship, and the branch resistance attribution result is determined to be a short-term operating condition disturbance.

[0088] If the deviation of the differential pressure response is greater than the differential pressure response deviation threshold, and the deviation of the thermal response change is less than or equal to the thermal response change deviation threshold, it indicates that the pressure response of the target branch deviates from the normal flow reference relationship, but the thermal response change does not deviate from the normal flow reference relationship. The branch resistance attribution result is determined to be an abnormal pressure sampling.

[0089] If the deviation of the differential pressure response is greater than the differential pressure response deviation threshold, the deviation of the thermal response change is greater than the thermal response change deviation threshold, and the improvement of the branch thermal response is insufficient after the flow response is confirmed, then it is determined that there is an abnormal local flow resistance in the non-leakage branch of the target branch.

[0090] Insufficient improvement in branch thermal response is judged as follows: If the change in the baseline thermal response is less than the threshold for identifying negative thermal response changes, it indicates that the branch thermal response value should show an identifiable reduction after the valve is adjusted in the direction of increasing flow under normal flow conditions; in the corresponding case, if the actual thermal response change is greater than or equal to 0, or although the actual thermal response change is less than 0, but the absolute value of the actual thermal response change is less than the absolute value of the baseline thermal response change, and the difference between the absolute value of the baseline thermal response change and the absolute value of the actual thermal response change is greater than the thermal response change deviation threshold, it is judged that the improvement in branch thermal response is insufficient; if the change in the baseline thermal response is not less than the threshold for identifying negative thermal response changes, it indicates that the valve adjustment in the direction of increasing flow under the current baseline relationship has not formed an identifiable reduction trend that can be used to judge the improvement in thermal response, and the branch resistance attribution result is judged as the local flow resistance of the branch to be confirmed.

[0091] After determining that there is an abnormal local flow resistance in the target branch due to non-leakage, the liquid cooling controller determines whether to prioritize quick-connector attribution based on the quick-connector status information. If the target branch has a quick-connector reconnection record, a quick-connector locking confirmation abnormality, a quick-connector maintenance mark, or evidence of abnormal pressure difference near the quick-connector, the branch resistance attribution result is determined to be a priority attribution for the abnormal flow resistance of the quick-connector. If the target branch has an abnormal local flow resistance in the non-leakage branch but does not have evidence of priority attribution for the quick-connector, the branch resistance attribution result is determined to be an abnormal local flow resistance in the non-leakage branch.

[0092] The quick-connector proximity pressure differential is typically used only when upstream and downstream pressure acquisition points are configured for the target branch. During maintenance and verification phases or when establishing the normal flow reference relationship for the branch, the liquid cooling controller simultaneously acquires the upstream and downstream pressures of the quick-connector, using the difference as the proximity pressure differential. It also associates and saves the liquid cooling pump output status, branch regulating valve opening, and proximity pressure differential to form a proximity pressure differential reference relationship. During current judgment, the liquid cooling controller reads or interpolates the proximity pressure differential from the proximity pressure differential reference relationship based on the current liquid cooling pump output status and the current branch regulating valve opening. The absolute value of the difference between the current proximity pressure differential and the proximity pressure differential reference is used as the proximity pressure differential deviation. When the proximity pressure differential deviation exceeds the proximity pressure differential deviation threshold, a proximity pressure differential is generated. Abnormal basis; the residual pressure difference near the quick connector refers to the difference between the measured residual pressure difference near the quick connector and the reference residual pressure difference near the quick connector corresponding to the same liquid cooling pump output state and the same branch regulating valve opening state when the quick connector is locked and confirmed; the absolute values ​​of the residual pressure difference near the quick connector are used to form the residual pressure difference near the quick connector; the number of valid samples in the residual pressure difference near the quick connector is not less than three; if the number of valid samples is less than three, the deviation threshold of the residual pressure difference near the quick connector will not be formed, and the abnormal basis of the residual pressure difference near the quick connector will not be used for priority attribution in the current control cycle; if the upstream pressure acquisition point and the downstream pressure acquisition point of the quick connector are not configured, or the reference residual pressure difference near the quick connector cannot be obtained, the abnormal basis of the residual pressure difference near the quick connector will not be generated, but it will not affect the priority attribution judgment of the quick connector based on the quick connector reconnection record, the abnormality of the quick connector locking confirmation, or the quick connector maintenance mark.

[0093] If the deviation of the differential pressure response is less than or equal to the differential pressure response deviation threshold, but the deviation of the thermal response change is greater than the thermal response change deviation threshold, it indicates that the thermal response change is deviating while the pressure response is not deviating. The corresponding situation is insufficient to prove that the local flow resistance of the branch is abnormal, and the branch resistance attribution result is determined to be the local flow resistance of the branch to be confirmed.

[0094] The adjustment module, based on suspected misjudgment of differential pressure and combined with the target branch resistance attribution result, determines whether the target branch differential pressure participates in the overall cabinet pump pressure target calculation. It then generates target branch regulating valve opening commands, liquid cooling pump output commands, and non-target branch regulating valve correction commands to obtain coordinated adjustment commands. These commands include the target branch differential pressure participation status, target branch regulating valve opening commands, liquid cooling pump output commands, non-target branch regulating valve correction commands, and maintenance reminder status. The target branch differential pressure participation status indicates whether the target branch differential pressure data participates in the overall cabinet pump pressure target calculation; the target branch regulating valve opening command... The control system can maintain the current opening of the target branch regulating valve, adjust the minimum opening of the branch regulating valve in the direction of increased flow by one step, adjust to the opening required for cooling of the target branch, or adjust the opening according to the normal flow reference relationship of the target branch under normal differential pressure conditions; the liquid cooling pump output command is used to control the liquid cooling pump to maintain the current output, increase by a minimum correction amount, or enter the leakage risk handling; the non-target branch regulating valve correction command is used to constrain whether the non-target normal branch needs valve correction due to changes in liquid cooling pump output; the maintenance reminder status is used for output pressure sampling abnormality, branch local flow resistance abnormality, quick coupling priority attribution, reference reconstruction, or maintenance reminder pending confirmation.

[0095] In a specific implementation, refer to Figure 4 Methods for obtaining coordinated control instructions include: In differential pressure coordinated regulation, the liquid cooling controller determines whether the differential pressure of the target branch participates in the calculation of the overall cabinet pump pressure target based on the differential pressure participation status. The calculation of the overall cabinet pump pressure target refers to the liquid cooling controller using the measured differential pressure of each liquid cooling branch that participates in the differential pressure participation status, the reference differential pressure, the current differential pressure deviation, and the thermal response value as the pump output adjustment input within the current liquid cooling control cycle to determine whether to increase, decrease, or maintain the liquid cooling pump output. For branches that do not participate in the differential pressure participation status, the measured differential pressure, the original differential pressure deviation, and the current differential pressure deviation are not used as the basis for increasing the liquid cooling pump output or correcting the valve opening of non-target branches, but the thermal response value is still used for the conservative cooling judgment of this branch.

[0096] Non-target normal branches refer to branches that have not generated leakage risk markers, pressure sampling anomaly markers, non-leakage branch local flow resistance anomaly markers, quick-connect flow resistance anomaly priority attribution markers, reference unavailable markers, or common source correction unavailable markers, and whose branch control valves have not generated markers reaching the upper or lower limits of allowable limits; pressure sampling anomaly markers refer to abnormal markers generated at the branch inlet pressure acquisition point or branch outlet pressure acquisition point, indicating communication loss, over-range, calibration failure, sensor malfunction, or exceeding the effective measurement range; temperature sampling anomaly markers and power consumption sampling anomaly markers are generated according to the abnormal states of the corresponding temperature acquisition module and power consumption acquisition module, respectively.

[0097] The method for calculating the predicted branch pressure difference is as follows: The liquid cooling controller calculates the reference branch pressure difference based on the current liquid cooling pump output state and the current branch regulating valve opening of the non-target normal branch, as well as the reference branch pressure difference when the liquid cooling pump output is increased by a minimum correction amount and the regulating valve opening of the non-target normal branch remains unchanged. The reference pressure difference increment is then added to the current measured branch pressure difference of the non-target normal branch to obtain the predicted branch pressure difference of the non-target normal branch. If the liquid cooling pump output state after the minimum correction amount is increased is not within the coverage range of the normal flow reference relationship of the corresponding non-target normal branch, or the corresponding reference branch pressure difference cannot be obtained, then the predicted branch pressure difference of the non-target normal branch is not generated, and the non-target normal branch is determined to not meet the pump output increase withstand condition.

[0098] The permissible branch differential pressure limit is determined based on the rated working pressure of the cold plate, quick connector, branch hose, branch regulating valve and pressure sensor of the corresponding non-target normal branch, or the branch safe differential pressure limit in the liquid cooling system commissioning document; when the differential pressure limits given in the above documents are different, the differential pressure limit with the smaller value shall be used as the permissible branch differential pressure limit.

[0099] The current differential pressure deviation of non-target branches is determined according to the method of obtaining the reference result of differential pressure of target branches; when the common source correction of non-target branches is available, the current differential pressure deviation is the value of the original differential pressure deviation of non-target branches minus the corresponding common pressure disturbance correction amount; the current differential pressure deviation of non-target normal branches is determined according to the method of obtaining the reference result of differential pressure of target branches; when a non-target branch generates a common source correction unavailable mark, it is not considered a non-target normal branch in the judgment of pump output improvement bearing conditions.

[0100] The conditions for increasing pump output include: the current output of the liquid-cooled pump, after being increased by a minimum correction amount, does not exceed the upper limit of the liquid-cooled pump output; the regulating valves of each non-target normal branch do not generate a mark indicating that the lower limit has been reached; the predicted branch pressure difference of each non-target normal branch, determined according to the calculation method of predicted branch pressure difference, does not exceed the corresponding upper limit of the allowed branch pressure difference; and the deviation of the current pressure difference of each non-target normal branch does not exceed the corresponding pressure difference deviation judgment threshold; the minimum correction amount of the liquid-cooled pump output comes from the minimum output adjustment step allowed by the liquid-cooled pump controller, and the upper limit of the liquid-cooled pump output comes from the liquid-cooled pump specification or the safe operating parameters of the liquid-cooled system.

[0101] Specifically, the liquid cooling controller first eliminates branches where differential pressure participation is not involved. Under the current liquid cooling pump output state, within the coverage area of ​​the normal flow reference relationship of the branch, the liquid cooling controller reads or interpolates the corresponding reference thermal response value according to the reference opening value of the branch regulating valve in ascending order. If there is no branch regulating valve reference opening value whose reference thermal response value is less than or equal to the upper limit of the allowable thermal response, or if the target branch regulating valve has reached the upper limit of the allowable opening and the target branch thermal response value is still greater than the upper limit of the allowable thermal response, then the corresponding branch is recorded as a candidate branch for increasing pump output. The rule for determining the upper limit of the valve opening adopts the rule for generating the valve reaching the upper limit of the allowable limit. When at least one candidate branch for increasing pump output exists and meets the conditions for increasing pump output, a command to increase the output of the liquid-cooled pump by a minimum correction amount is generated. When no candidate branch for increasing pump output exists, the current output of the liquid-cooled pump is maintained and no command to increase pump output is generated. When a candidate branch for increasing pump output exists but any non-target normal branch does not meet the conditions for increasing pump output, the current output of the liquid-cooled pump is maintained, and a prompt is given for insufficient differential pressure bearing capacity or a prompt for differential pressure status review for the non-target normal branch that does not meet the conditions.

[0102] When the differential pressure is suspected to be misjudged as normal and usable, or the branch resistance attribution result is a short-term operating condition disturbance, the liquid cooling controller determines the target branch differential pressure participation status as participating in the calculation of the overall cabinet pump pressure target. At this time, the target branch differential pressure data is identified as usable for coordinated regulation, and the liquid cooling controller generates a normal coordinated regulation command based on the current differential pressure deviation of the target branch, the thermal response value of the target branch, and the normal flow reference relationship of the target branch.

[0103] Specifically, if the thermal response value of the target branch is less than or equal to the upper limit of the allowable thermal response, and the absolute value of the current differential pressure deviation of the target branch is less than or equal to the differential pressure deviation judgment threshold, then the regulating valve of the target branch maintains its current opening. If the thermal response value of the target branch is greater than the upper limit of the allowable thermal response, then the liquid cooling controller searches for the minimum regulating valve opening of the branch that allows the reference thermal response value to be less than or equal to the upper limit of the allowable thermal response in the normal flow reference relationship of the target branch, and uses the opening as the cooling demand opening of the target branch. When the cooling demand opening of the target branch is greater than the current regulating valve opening, the opening command of the regulating valve of the target branch is to adjust to the cooling demand opening of the target branch. When the cooling demand opening of the target branch is less than or equal to the current regulating valve opening, the opening command of the regulating valve of the target branch is to maintain its current opening.

[0104] The allowable upper limit of thermal response is determined by the server baseboard management controller temperature alarm threshold, the cooling requirements provided by the cold plate supplier, or the thermal management limit for the corresponding server model in the cabinet liquid cooling system commissioning document. If both of these documents exist, the thermal management limit confirmed for the current server model in the liquid cooling system commissioning document shall prevail. The allowable upper limit of thermal response is used for comparison with the branch thermal response value. When the cold plate supplier or liquid cooling system commissioning document directly provides the upper limit of temperature rise per unit power consumption, the upper limit of temperature rise per unit power consumption shall be used as the allowable upper limit of thermal response. When only the upper limit of coolant temperature rise is given, the upper limit of coolant temperature rise shall be divided by the current effective server power consumption to obtain the allowable upper limit of thermal response for the current control cycle. When only the server temperature alarm threshold is given, the server temperature, supply temperature, branch outlet temperature, and server power consumption samples recorded during the cabinet commissioning phase shall be first processed according to the server model and power consumption range. Grouping is performed, and then the branch thermal response values ​​are sorted from smallest to largest. The maximum branch thermal response value is selected from the samples where the server temperature is below the server temperature alarm threshold and a safety margin is retained. This maximum thermal response value is used as the upper limit of allowable thermal response for the server model and corresponding power consumption range. The safety margin is 3% to 10% of the server temperature alarm threshold, or the temperature margin confirmed in the liquid cooling system debugging file. When the number of debugging samples used to determine the upper limit of allowable thermal response is less than three groups, or there are no samples where the server temperature is below the server temperature alarm threshold and a safety margin is retained, the upper limit of allowable thermal response is not generated based on the server temperature alarm threshold. In this case, the upper limit of temperature rise per unit power consumption provided by the cold plate supplier or the thermal management limit in the liquid cooling system debugging file is preferred. If neither of the above data exists, the target branch thermal response value is marked as unusable for automatic valve opening optimization, and only a thermal response upper limit configuration missing prompt is output.

[0105] When the differential pressure is suspected to be a misjudgment of leakage risk, the liquid cooling controller generates a leakage risk collaborative adjustment instruction. The leakage risk collaborative adjustment instruction includes: the target branch differential pressure participation status is not included in the overall cabinet pump pressure target calculation; the target branch regulating valve opening instruction is executed according to the liquid cooling system leakage safety strategy; the liquid cooling pump output instruction is executed according to the liquid cooling system leakage safety strategy; the maintenance prompt status is leakage risk prompt; the leakage safety strategy includes closing the target branch regulating valve, reducing the liquid cooling pump output, or maintaining the emergency circulation status. The strategy is derived from at least one of the liquid cooling system safe operation parameters, the cabinet liquid cooling controller configuration file, or the cabinet operation and maintenance procedures. In this embodiment, under the leakage risk status, the abnormal isolation adjustment of the local flow resistance of the non-leakage branch is not performed, nor is the abnormal differential pressure of the target branch used to increase the overall cabinet pump pressure.

[0106] When the differential pressure is suspected to be misjudged as an unavailable baseline, the liquid cooling controller generates a conservative cooling command indicating that the baseline is unavailable. This conservative cooling command includes: the target branch differential pressure participation status is set to not participate in the overall cabinet pump pressure target calculation; the target branch regulating valve must not be abnormally closed due to the current differential pressure; if the target branch thermal response value is valid and greater than the allowable thermal response upper limit, and the target branch regulating valve has not reached the allowable opening upper limit, then the target branch regulating valve opening command is to maintain the current opening or adjust the minimum opening step of the regulating valve in the direction of increased flow by one branch; if the target branch regulating valve has reached the allowable opening... If the upper limit is reached, the current opening degree will be maintained and a baseline supplementation prompt and a cooling capacity verification prompt will be output. If the target branch thermal response value is invalid, the target branch regulating valve opening command will be maintained at the current opening degree and a baseline supplementation prompt will be output. An invalid target branch thermal response value means that the server power consumption is less than or equal to the allowable absolute measurement error of the power acquisition module within the corresponding power consumption range, or any data of the liquid supply temperature, branch outlet temperature, or server power consumption generates a sampling abnormality mark. The baseline supplementation prompt is used to prompt the re-establishment or supplementation of the normal flow reference relationship of the branch after the conditions for establishing the normal flow reference relationship of the branch are met.

[0107] When the branch resistance attribution result indicates an abnormal pressure sampling, the liquid cooling controller generates a pressure sampling abnormality isolation and adjustment command. This command includes: the target branch differential pressure participation status is set to not participate in the overall cabinet pump pressure target calculation; the target branch regulating valve must not be closed due to the current abnormal differential pressure; the liquid cooling controller uses the target branch thermal response value and the allowable thermal response upper limit to determine the target branch's cooling demand; if the target branch thermal response value is valid and less than or equal to the allowable thermal response upper limit, the target branch regulating valve maintains its current opening, and the liquid cooling pump output does not increase due to the abnormal differential pressure of the target branch; if the target branch thermal response value is valid... If the thermal response value is greater than the upper limit of the allowable thermal response, the target branch control valve will adjust its minimum opening step by one branch control valve in the direction of increased flow, or adjust it to the minimum branch control valve opening that makes the reference thermal response value less than or equal to the upper limit of the allowable thermal response under the current liquid cooling pump output state; if the thermal response value of the target branch is invalid, the target branch control valve will maintain its current opening and output a pressure sampling maintenance prompt and a thermal response data unavailable prompt; the pressure sampling maintenance prompt shall at least include the target branch number, the time of the pressure sampling anomaly, and the inspection prompts for the target branch inlet pressure acquisition point and the target branch outlet pressure acquisition point.

[0108] When the target branch control valve has not reached the upper limit of the allowable opening, and there is a flow confirmation opening that meets the requirements of the pressure response identification threshold and the thermal response change identification threshold, the target branch control valve adjusts to the direction of increasing flow by one branch control valve minimum opening execution step; when the target branch control valve reaches the upper limit of the allowable opening, or there is no flow confirmation opening that meets the requirements, the target branch control valve maintains the current opening and outputs the corresponding maintenance prompt.

[0109] When the branch resistance attribution result indicates an abnormal local flow resistance in a non-leakage branch, the liquid cooling controller generates an isolation and adjustment command for the abnormal local flow resistance in a non-leakage branch. This command includes: temporarily removing the target branch differential pressure from the overall pump pressure target calculation; ensuring the target branch control valve is not closed due to the current abnormal differential pressure; maintaining the current opening of the target branch control valve and preventing an increase in liquid cooling pump output due to the abnormal differential pressure if the target branch thermal response value is less than or equal to the upper limit of the allowable thermal response; maintaining the current opening of the target branch control valve or adjusting it one step towards increasing flow by the minimum opening step of the branch control valve if the target branch thermal response value is greater than the upper limit of the allowable thermal response and the target branch control valve has not reached the upper limit of the allowable opening; and issuing a maintenance reminder for the local flow resistance in the output branch. The rule for determining if a valve has reached the upper limit of the allowable opening is based on the rule for generating the valve's upper limit mark.

[0110] In the isolation and adjustment of abnormal local flow resistance in non-leakage branches, the liquid-cooled pump must not increase solely based on the abnormal differential pressure of the target branch; the liquid-cooled controller will only generate a minimum correction command to increase the liquid-cooled pump output when the thermal response value of the target branch is greater than the upper limit of the allowable thermal response and meets the conditions for increasing pump output; if any non-target normal branch does not meet the conditions for increasing pump output, the liquid-cooled controller will not compensate the target branch by continuing to increase the liquid-cooled pump output, but will maintain the isolation state of the differential pressure data of the target branch and output a maintenance prompt for the local flow resistance of the branch.

[0111] When the branch resistance attribution result indicates that the abnormal flow resistance of the quick-connect fitting is the primary cause, the liquid cooling controller generates an isolation and regulation command under the primary cause of the abnormal flow resistance of the quick-connect fitting. The isolation and regulation command includes: the target branch differential pressure participation status is temporarily removed from the calculation of the overall cabinet pump pressure target; the target branch regulating valve must not be closed due to abnormal differential pressure; if the target branch thermal response value is greater than the allowable thermal response upper limit, and the target branch regulating valve has not reached the allowable opening upper limit, then the target branch regulating valve maintains its current opening or adjusts to the direction of increased flow by one branch regulating valve minimum opening step; if the target branch regulating valve... If the maximum allowable opening has been reached, maintain the current opening and output a prompt indicating that the abnormal flow resistance of the quick connector is the primary cause of the problem; the conditions for increasing the output of the liquid cooling pump shall be the same as those for increasing the output of the pump mentioned above; the pump pressure shall not be directly and continuously increased due to the priority attribution of the quick connector; the prompt indicating that the abnormal flow resistance of the quick connector is the primary cause of the problem shall include at least one of the following: target branch number, quick connector reconnection record, quick connector locking confirmation abnormality, quick connector maintenance mark or pressure difference abnormality basis near the quick connector, as well as inspection prompts for quick connector locking status, sealing ring position, connector core springback status and foreign matter condition inside the connector.

[0112] When the branch resistance attribution result indicates that the local flow resistance of the branch needs to be confirmed, the liquid cooling controller generates a conservative adjustment command to be confirmed. The conservative adjustment command to be confirmed includes: the target branch differential pressure participation status is not included in the calculation of the overall cabinet pump pressure target; the target branch regulating valve must not be closed due to the current abnormal differential pressure; if the target branch thermal response value is valid and greater than the upper limit of the allowable thermal response, the target branch regulating valve maintains its current opening or adjusts the minimum opening step of the branch regulating valve in the direction of increasing flow; if the target branch thermal response value is valid and less than or equal to the upper limit of the allowable thermal response, the target branch regulating valve maintains its current opening; if the target branch thermal response value is invalid, the target branch regulating valve maintains its current opening and outputs a maintenance prompt to be confirmed. The maintenance prompt to be confirmed is used to prompt the re-execution of flow response confirmation, verification of temperature acquisition status, verification of power consumption acquisition status, verification of pressure sampling status, or manual inspection of the local flow status of the branch.

[0113] When generating correction commands for non-target branch control valves, the liquid cooling controller only corrects the non-target normal branch. If the liquid cooling pump output command is to maintain the current output, the control valve of the non-target normal branch maintains its current opening. If the non-target normal branch is performing independent cooling closed-loop control, the valve opening command is generated only according to the thermal response value and normal flow reference relationship of the non-target normal branch, without using the abnormal pressure difference of the target branch as input. If the liquid cooling pump output command is to increase by a minimum correction amount, the liquid cooling controller determines whether it is permissible based on the pump output increase tolerance conditions. The liquid cooling pump output can be increased. If the predicted branch differential pressure of any non-target normal branch exceeds the upper limit of the allowable branch differential pressure, or if the current differential pressure deviation of any non-target normal branch exceeds the corresponding differential pressure deviation judgment threshold, the liquid cooling controller will not generate a liquid cooling pump output increase command, but will generate a differential pressure withstand capability insufficient prompt or differential pressure status verification prompt for the corresponding non-target normal branch. If all non-target normal branches meet the pump output increase withstand conditions, a command to increase the liquid cooling pump output by a minimum correction amount will be generated, and the regulating valve of the non-target normal branch will be kept at its current opening.

[0114] The minimum opening step distance of the branch control valve is derived from the branch control valve actuator specification or the liquid cooling controller configuration file.

[0115] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cabinet liquid cooling branch differential pressure coordinated regulation system, characterized in that, include: The observation module collects target branch operation data and generates target branch observation results based on the target branch operation data. The analysis module establishes and calls the normal flow reference relationship of the branch, analyzes the current reference result of the target branch in combination with the observation results of the target branch, analyzes the pressure difference deviation of the target branch based on the current reference result and the observation results of the target branch, and performs common pressure disturbance analysis based on the pressure difference deviation and the pressure difference deviation of non-target branches that meet the common source reference conditions under the same supply and return liquid main, and obtains the pressure difference reference result of the target branch. The identification module generates suspected misjudgment results of pressure difference based on the observation results of the target branch and the reference results of the pressure difference of the target branch; The attribution module performs flow response confirmation on the target branch when the suspected differential pressure misjudgment result is a suspected non-leakage differential pressure misjudgment or a suspected differential pressure abnormality under the condition that common source correction is unavailable. It obtains the confirmed target branch observation results and the confirmed baseline results. Based on the target branch observation results, the confirmed target branch observation results, the current baseline results, and the confirmed baseline results, it analyzes and obtains the target branch resistance attribution results. The adjustment module, based on the suspected misjudgment of differential pressure and in conjunction with the target branch resistance attribution result, determines whether the differential pressure of the target branch is involved in the calculation of the overall pump pressure target, and generates the target branch regulating valve opening command, liquid cooling pump output command, and non-target branch regulating valve correction command to obtain the coordinated adjustment command.

2. The cabinet liquid cooling branch differential pressure coordinated adjustment system according to claim 1, characterized in that, Methods for obtaining target branch observation results include: The system collects data on the target branch's inlet pressure, outlet pressure, liquid coolant pump output status, branch regulating valve opening, supply liquid temperature, branch outlet liquid temperature, server power consumption, leakage status, and quick-connect coupling status. It obtains the measured differential pressure of the target branch based on the difference between the inlet and outlet pressures, and the thermal response value of the target branch based on the branch outlet liquid temperature, supply liquid temperature, and server power consumption. The measured differential pressure, liquid coolant pump output status, branch regulating valve opening, target branch thermal response value, server power consumption, leakage status, and quick-connect coupling status are used as the observation results for the target branch.

3. The cabinet liquid cooling branch differential pressure coordinated adjustment system according to claim 1, characterized in that, Methods for establishing normal flow reference relationships for branch lines include: When the target branch does not trigger a risk of leakage, the quick connector is in a locked confirmation state, the branch regulating valve meets the valve positioning conditions, and the liquid cooling pump meets the pump output positioning conditions and no sampling anomaly mark is generated, a reference operating point is formed by combining the liquid cooling pump reference output value and the branch regulating valve reference opening value. At each reference operating point, the pressure, temperature and power consumption of the target branch are collected to obtain the corresponding reference pressure difference and reference thermal response. The reference operating point is then associated with and saved with the corresponding reference pressure difference and reference thermal response to form a normal flow reference relationship for the branch.

4. The cabinet liquid cooling branch differential pressure coordinated adjustment system according to claim 1, characterized in that, Methods for obtaining reference results for target branch differential pressure include: Based on the current output status of the liquid cooling pump and the current opening of the regulating valve in the target branch, the current reference result is obtained by reading or interpolating from the normal flow reference relationship of the branch; the original differential pressure deviation of the target branch is obtained by comparing the measured differential pressure in the observed differential pressure of the target branch with the reference differential pressure in the current reference result; non-target branches that meet the common source reference conditions under the same supply and return liquid main are designated as available common source reference branches. When the number of available common source reference branches is less than two, a common source correction unavailable flag is generated, and the original differential pressure deviation of the target branch is used as the subsequent suspected anomaly judgment object; when the number of available common source reference branches is two, if the absolute value of the difference between the original differential pressure deviations of the two available common source reference branches is greater than the common source consistency threshold, a common source correction unavailable flag is generated. If the absolute value of the difference in original differential pressure deviation between two available common-source reference branches is less than or equal to the common-source consistency threshold, then the average value of the original differential pressure deviation of the two available common-source reference branches is used as the common pressure disturbance correction amount; when the number of available common-source reference branches is greater than two, the median of the original differential pressure deviation of each available common-source reference branch is used as the common pressure disturbance correction amount; when generating the common pressure disturbance correction amount, the difference between the original differential pressure deviation of the target branch and the common pressure disturbance correction amount is used as the current differential pressure deviation of the target branch; at least one of the following is used as the differential pressure reference result of the target branch: the current benchmark result, the original differential pressure deviation of the target branch, the common pressure disturbance correction amount, the current differential pressure deviation amount, and the common-source correction unavailable flag.

5. The cabinet liquid cooling branch differential pressure coordinated adjustment system according to claim 1, characterized in that, Methods for identifying suspected misjudgments in differential pressure results include: When a baseline unavailable marker is generated in the target branch differential pressure reference results, the suspected differential pressure misjudgment result is determined as baseline unavailable. When no baseline unavailable marker is generated and a leakage risk marker exists in the target branch observation results, the suspected differential pressure misjudgment result is determined as leakage risk. When no baseline unavailable marker is generated, no leakage risk marker exists, and no common source correction unavailable marker is generated, the absolute value of the current differential pressure deviation of the target branch is compared with the differential pressure deviation judgment threshold. If it is less than or equal to the differential pressure deviation judgment threshold, it is determined as normal differential pressure available. If it is greater than the differential pressure deviation judgment threshold, it is determined as a suspected non-leakage differential pressure misjudgment. When no baseline unavailable marker is generated, no leakage risk marker exists, but a common source correction unavailable marker is generated, the absolute value of the original differential pressure deviation of the target branch is compared with the differential pressure deviation judgment threshold. If it is less than or equal to the differential pressure deviation judgment threshold, it is determined as normal differential pressure available. If it is greater than the differential pressure deviation judgment threshold, it is determined as a suspected differential pressure abnormality under common source correction unavailable.

6. The cabinet liquid cooling branch differential pressure coordinated adjustment system according to claim 1, characterized in that, The methods for performing flow response confirmation include: When the suspected differential pressure misjudgment result is a suspected non-leakage differential pressure misjudgment or a suspected differential pressure abnormality under the condition that common source correction is unavailable, determine whether there is a flow confirmation opening that meets the confirmation conditions; when there is a flow confirmation opening that meets the confirmation conditions, adjust the target branch control valve in the direction of increasing flow by one branch control valve minimum opening execution step; after the flow response confirmation holding time expires, collect the target branch operation data after confirmation to obtain the target branch observation results after confirmation; call the normal flow reference relationship of the branch to obtain the reference results after confirmation; when there is no flow confirmation opening that meets the confirmation conditions, use the most recent effective valve opening change data within the preset effective time window before the current judgment time as the flow response confirmation data, or output the local flow resistance of the branch to be confirmed.

7. The cabinet liquid cooling branch differential pressure coordinated adjustment system according to claim 6, characterized in that, The flow confirmation opening is determined based on the normal flow reference relationship of the branch: under the current output state of the liquid cooling pump, the reference opening of the adjacent valve that is greater than the current branch regulating valve opening is used as the target opening. When the absolute value of the change in the reference differential pressure and the absolute value of the change in the reference thermal response corresponding to the target opening are both greater than the corresponding identifiable threshold, the difference between the target opening and the current branch control valve opening is used as the flow confirmation opening. When there is no target opening that meets the conditions, the flow response is confirmed by using the most recent effective valve opening change data within the preset effective time window before the current judgment time; if the data does not exist, the local flow resistance of the output branch is to be confirmed.

8. The cabinet liquid cooling branch differential pressure coordinated adjustment system according to claim 1, characterized in that, Methods for obtaining the attribution results of target branch resistance include: Based on the observation results of the target branch and the confirmed observation results of the target branch, the measured pressure difference change and thermal response value change before and after the flow response confirmation are obtained; based on the current benchmark results and the confirmed benchmark results, the corresponding benchmark pressure difference change and benchmark thermal response change are obtained; the pressure difference response deviation is obtained based on the absolute value of the difference between the measured pressure difference change and the benchmark pressure difference change, and the thermal response change deviation is obtained based on the absolute value of the difference between the thermal response value change and the benchmark thermal response change. When the pressure difference response deviation is less than or equal to the pressure difference response deviation threshold and the thermal response change deviation is less than or equal to the thermal response change deviation threshold, the short-time operating condition is obtained. Disturbances; when the deviation of the differential pressure response is greater than the differential pressure response deviation threshold and the deviation of the thermal response change is less than or equal to the thermal response change deviation threshold, a pressure sampling anomaly is obtained; when the deviation of the differential pressure response is greater than the differential pressure response deviation threshold, the deviation of the thermal response change is greater than the thermal response change deviation threshold, and the improvement of the branch thermal response is insufficient after the flow response is confirmed, a non-leakage branch local flow resistance anomaly is obtained; when the non-leakage branch local flow resistance anomaly meets the quick-connect primary attribution condition, a quick-connect flow resistance anomaly is obtained as a primary attribution; in other cases where the above attribution cannot be completed, the branch local flow resistance is obtained as pending confirmation.

9. The cabinet liquid cooling branch differential pressure coordinated adjustment system according to claim 8, characterized in that, Methods for determining the preferred cause of abnormal flow resistance in quick-connect couplings include: When a target branch is determined to be a non-leakage branch with abnormal local flow resistance, and the target branch has records of quick-connect reconnection, abnormal quick-connect locking confirmation, quick-connect maintenance markings, or abnormal pressure difference near the quick-connect, the target branch resistance attribution result is determined as the priority attribution for abnormal quick-connect flow resistance. Among them, the abnormal pressure difference near the quick-connect is generated based on the deviation of the adjacent pressure difference between the upstream and downstream pressures of the quick-connect being greater than the adjacent pressure difference deviation threshold when configuring upstream and downstream pressure sampling points for the quick-connect.

10. The cabinet liquid cooling branch differential pressure coordinated adjustment system according to claim 1, characterized in that, Methods for obtaining coordinated control instructions include: When the suspected misjudgment result of differential pressure is that the normal differential pressure is available or the target branch resistance attribution result is a short-term operating condition disturbance, the target branch differential pressure is included in the calculation of the overall cabinet pump pressure target. When the suspected misjudgment result of differential pressure is leakage risk, the target branch differential pressure is removed from the calculation of the overall cabinet pump pressure target, and a leakage risk collaborative adjustment command is generated. When the suspected misjudgment result of differential pressure is that the baseline is unavailable, the target branch differential pressure is removed from the calculation of the overall cabinet pump pressure target, and a baseline unavailable conservative cooling command is generated. When the target branch resistance attribution result is pressure sampling abnormality, non-leakage branch local flow resistance abnormality, quick connector flow resistance abnormality priority attribution, or branch local flow resistance pending confirmation, the target branch differential pressure is removed from the calculation of the overall cabinet pump pressure target, and a target branch regulating valve opening command, a liquid cooling pump output command, and a non-target branch regulating valve correction command are generated based on the target branch thermal response value, the allowable thermal response upper limit, the liquid cooling pump output upper limit, and the predicted branch differential pressure of the non-target normal branch, thus obtaining a collaborative adjustment command.

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