Liquid separation control method and device, liquid cooling source unit, equipment and storage medium

Abstract

The invention relates to a liquid separation control method and device, a liquid cooling source unit, equipment and a storage medium. The method comprises the steps that for each preset refrigeration module, the air suction overheating temperature corresponding to the refrigeration module is detected, and the cooling liquid flow of the refrigeration module on the corresponding branch pipeline is adjusted according to the air suction overheating temperature corresponding to the refrigeration module; and the cooling liquid outlet temperature of each refrigeration module on the corresponding branch pipeline is detected, and the cooling liquid flow of each refrigeration module on the corresponding branch pipeline is adjusted according to the difference value between the cooling liquid outlet temperatures of any two refrigeration modules. The cooling liquid flow of the refrigeration modules on the corresponding branch pipelines is adjusted, the problem that the refrigeration efficiency of the refrigeration modules is low due to the fact that the cooling liquid flow of the branch pipelines is too large or too small can be avoided, the cooling liquid outlet temperatures of all the refrigeration modules are similar, secondary heat exchange of the cooling liquid on the liquid supply pipeline is avoided, and the cooling efficiency of the refrigeration modules is improved. And the refrigerating capacity of the whole machine is improved.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and particularly to a liquid separation control method, device, liquid cooling source unit, equipment and storage medium. Background Art

[0002] A liquid cooling source unit is a system for cooling heat-generating equipment. In the liquid cooling source unit, a coolant circulates, absorbs the heat generated by the heat-generating equipment through the coolant, and cools the coolant flowing through the refrigeration module by the refrigerant circulating in the refrigeration module of the liquid cooling source unit.

[0003] Currently, in order to improve the flexibility and refrigeration efficiency of the system, multiple refrigeration modules with the same structure are provided in the liquid cooling source unit so that the number and configuration of the refrigeration modules can be adjusted according to actual needs. However, in the liquid cooling source unit, due to the different positions of each refrigeration module, the flow lengths of the coolant flowing through each refrigeration module are different, and the local resistances of each refrigeration module are not exactly the same, resulting in differences and uncontrollability in the coolant flow rates flowing through each refrigeration module. The uncontrollability of the coolant flow rate in the liquid cooling source unit easily leads to a decrease in the refrigeration capacity of the liquid cooling source unit. If the coolant flow rate through the refrigeration module is too small, the heat exchange area of the plate heat exchanger in the refrigeration module cannot be fully utilized, which will cause the refrigerant in the plate heat exchanger not to fully exchange heat, resulting in the refrigeration capacity of the refrigeration module being lower than the design value. Even worse, because the refrigerant fails to completely evaporate and gasify, it will cause the problem of liquid carrying operation of the compressor. If the coolant flow rate through the refrigeration module is too large, it will cause the coolant to quickly flow through the plate heat exchanger and quickly release heat, increasing the evaporation pressure of the refrigerant in the plate heat exchanger, thereby increasing the evaporation temperature of the refrigerant, reducing the heat exchange temperature difference between the gasified refrigerant and the coolant, resulting in a decrease in the heat exchange efficiency of the plate heat exchanger, and further affecting the refrigeration capacity of the refrigeration module. Summary of the Invention

[0004] The present application provides a liquid separation control method, device, liquid cooling source unit, equipment and storage medium to solve the problem that the uncontrollability of the coolant flow rate in the liquid cooling source unit easily leads to a decrease in the refrigeration capacity of the liquid cooling source unit.

[0005] In view of the above technical problems, the technical solution of the present application is solved by the following embodiments:

[0006] An embodiment of the present application provides a liquid separation control method, including: for each preset refrigeration module, detecting the suction superheat temperature corresponding to the refrigeration module and adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module; detecting the coolant outlet temperature of each refrigeration module in the corresponding branch pipeline, and adjusting the coolant flow rate of each refrigeration module in the corresponding branch pipeline according to the difference value between the coolant outlet temperatures of any two refrigeration modules.

[0007] Among them, the detecting the suction superheat temperature corresponding to the refrigeration module includes: detecting the suction pressure and suction temperature corresponding to the compressor in the refrigeration module; querying the evaporation temperature corresponding to the suction pressure; and determining the absolute value of the difference between the suction temperature and the evaporation temperature as the suction superheat temperature corresponding to the refrigeration module.

[0008] Among them, the adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module includes: when the suction superheat temperature is less than a preset first suction superheat threshold, increasing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to a preset first gradient value; when the suction superheat temperature is greater than a preset second suction superheat threshold, decreasing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the first gradient value; wherein, the first suction superheat threshold is less than the second suction superheat threshold; when the suction superheat temperature is greater than or equal to the first suction superheat threshold and less than or equal to the second suction superheat threshold, maintaining the coolant flow rate of the refrigeration module in the corresponding branch pipeline.

[0009] Among them, the adjusting the coolant flow rate of each refrigeration module in the corresponding branch pipeline according to the difference value between the coolant outlet temperatures of any two refrigeration modules includes: determining a first difference value between the coolant outlet temperatures of any two refrigeration modules; when each of the first difference values is less than or equal to a preset first difference threshold, maintaining the coolant flow rate of each refrigeration module in the corresponding branch pipeline; when at least one of the first difference values is greater than the first difference threshold, detecting the coolant supply temperature of the supply pipeline at a position after the coolants in each branch pipeline are merged into the supply pipeline; and adjusting the coolant flow rate of each refrigeration module in the corresponding branch pipeline according to the difference between the coolant outlet temperature of each refrigeration module and the coolant supply temperature of the supply pipeline.

[0010] Among them, adjusting the coolant flow rates of the respective refrigeration modules in the corresponding branch pipelines according to the differences between the coolant outlet temperatures of the respective refrigeration modules and the coolant supply temperature of the supply pipeline includes: determining second difference values between the coolant outlet temperatures of the respective refrigeration modules and the coolant supply temperature; for the refrigeration modules with the second difference values less than or equal to a preset second difference threshold, maintaining the coolant flow rates of the refrigeration modules in the corresponding branch pipelines; for the refrigeration modules with the second difference values greater than the second difference threshold, when the coolant outlet temperature corresponding to the refrigeration module is greater than the coolant supply temperature, reducing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to a preset second gradient value; when the coolant outlet temperature corresponding to the refrigeration module is less than the coolant supply temperature, increasing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the second gradient value.

[0011] Among them, adjusting the coolant flow rates of the respective refrigeration modules in the corresponding branch pipelines according to the differences between the coolant outlet temperatures of the respective refrigeration modules and the coolant supply temperature of the supply pipeline includes: for each refrigeration module, when the coolant outlet temperature of the refrigeration module is greater than the coolant supply temperature, reducing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to a preset second gradient value; when the coolant outlet temperature of the refrigeration module is less than the coolant supply temperature, increasing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the second gradient value.

[0012] Among them, after adjusting the coolant flow rate of the branch pipeline corresponding to the refrigeration module according to the suction superheat temperature corresponding to the refrigeration module, it further includes: detecting the coolant flow rate of the supply pipeline; when the coolant flow rate of the supply pipeline is inconsistent with a preset target supply flow rate, adjusting the opening degree of the supply ratio regulating valve provided in the supply pipeline to adjust the coolant flow rate of the supply pipeline to the target supply flow rate.

[0013] Among them, adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline includes: adjusting the opening degree of the shunt ratio regulating valve of the refrigeration module in the corresponding branch pipeline to adjust the coolant flow rate of the refrigeration module in the corresponding branch pipeline.

[0014] The embodiment of the present application further provides a liquid separation control device, including: a first adjustment module, configured to detect the suction superheat temperature corresponding to each preset refrigeration module for each preset refrigeration module and adjust the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module; a second adjustment module, configured to detect the coolant outlet temperature of each refrigeration module in the corresponding branch pipeline, and adjust the coolant flow rate of each refrigeration module in the corresponding branch pipeline respectively according to the difference value between the coolant outlet temperatures of any two refrigeration modules.

[0015] The embodiment of the present application further provides a liquid-cooled source unit, where the liquid-cooled source unit includes: a control module; the control module is configured to execute the liquid separation control method described in any one of the above.

[0016] Wherein, the liquid-cooled source unit further includes: a flow meter and a supply proportion regulating valve arranged on the supply pipeline; the flow meter detects the coolant flow rate of the supply pipeline and reports it to the control module; when the coolant flow rate of the supply pipeline is inconsistent with a preset target supply flow rate, the control module adjusts the opening degree of the supply proportion regulating valve to adjust the coolant flow rate of the supply pipeline to the target supply flow rate.

[0017] Wherein, the liquid-cooled source unit further includes; a plurality of shunt proportion regulating valves respectively arranged on different branch pipelines; the control module adjusts the coolant flow rate of the refrigeration module in the corresponding branch pipeline by adjusting the opening degree of the shunt proportion regulating valve of the refrigeration module in the corresponding branch pipeline.

[0018] The embodiment of the present application further provides a liquid separation control device, including: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; at least one memory connected to the at least one bus, wherein the processor is configured to: execute the liquid separation control program stored in the memory to implement the liquid separation control method described in any one of the above.

[0019] The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed to implement the liquid separation control method described in any one of the above.

[0020] The above technical solution provided by the embodiments of the present application has the following advantages compared with the prior art: The method provided by the embodiments of the present application can detect the suction superheat temperature corresponding to each preset refrigeration module for each preset refrigeration module, and adjust the coolant flow rate of the refrigeration module on the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module; detect the coolant outlet temperature of each refrigeration module on the corresponding branch pipeline, and adjust the coolant flow rate of each refrigeration module on the corresponding branch pipeline respectively according to the difference value between the coolant outlet temperatures of any two refrigeration modules. According to the suction superheat temperature corresponding to the refrigeration module, the embodiments of the present application adjust the coolant flow rate of the refrigeration module on the corresponding branch pipeline, which can avoid the problems of excessive or too small coolant flow rate in the branch pipeline, resulting in low refrigeration energy efficiency of the refrigeration module, maximize the refrigeration capacity of the refrigeration module, and can adjust the coolant flow rate of each refrigeration module on the corresponding branch pipeline respectively according to the difference value between the coolant outlet temperatures of any two refrigeration modules, so that the coolant outlet temperatures of each refrigeration module are similar, avoiding the problem of cold quantity loss caused by the secondary heat exchange of the coolant flowing out of each refrigeration module in the supply pipeline, and improving the refrigeration capacity of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] One or more embodiments are illustrated by way of example in the accompanying drawings, and these exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the figures do not constitute a proportional limitation.

[0024] Figure 1 FIG. is a structural diagram of a liquid cooling source unit according to an embodiment of the present application;

[0025] Figure 2 FIG. is a flowchart of a liquid distribution control method according to an embodiment of the present application;

[0026] Figure 3 FIG. is a flowchart of steps for finely adjusting the coolant flow rate of a branch pipeline according to an embodiment of the present application;

[0027] Figure 4Structural diagram of a liquid separation control device according to an embodiment of the present application;

[0028] Figure 5 Structural diagram of a liquid separation control device according to an embodiment of the present application. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0030] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0031] An embodiment of the present application provides a liquid cooling source unit. As Figure 1 shown, it is a structural diagram of a liquid cooling source unit according to an embodiment of the present application.

[0032] The liquid cooling source unit includes, but is not limited to: a liquid supply port 1 connected to one end of a liquid supply pipeline (thick line), a liquid return port 2 connected to the other end of the liquid supply pipeline, a liquid storage tank 3 with an interface connected to the liquid supply pipeline, a liquid supply temperature sensor 4 and a flow meter 5 provided on the liquid supply pipeline, a plurality of refrigeration modules 6 connected in parallel to the liquid supply pipeline through branch pipelines respectively, and an outlet liquid temperature sensor 7 provided on each branch pipeline. Further, in order to make the coolant flow rate through each refrigeration module 6 controllable, the liquid cooling source unit further includes: a control module (not shown in the figure), a liquid supply proportional regulating valve 8 provided on the liquid supply pipeline, and a branch proportional regulating valve 9 provided on each branch pipeline.

[0033] The liquid supply port 1 and the liquid return port 2 are respectively connected to a heating device. The liquid supply port 1 is a port of the liquid supply pipeline for delivering the coolant in the liquid supply pipeline to the heating device so as to use the coolant to cool the heating device. The liquid return port 2 is another port of the liquid supply pipeline for returning the coolant after absorbing heat back to the liquid supply pipeline. Among them, the heating device is a device that needs to use coolant for cooling.

[0034] The liquid storage tank 3 is used to store the coolant and provide the coolant for the liquid supply pipeline.

[0035] The refrigeration module 6 is used to cool the cooling liquid that absorbs heat. Each refrigeration module 6 includes: a compressor 61, a condenser 62, a throttle valve 63, a plate heat exchanger 64, and a pressure sensor 65 and an air intake temperature sensing package 66 arranged on the circulation pipeline. The pressure sensor 65 and the air intake temperature sensing package 66 are both arranged on one side of the air intake pipe of the compressor 61 (a section of the circulation pipeline between the plate heat exchanger 64 and the compressor 61). The pressure sensor 65 is used to detect the air pressure in the air intake pipe. The air intake temperature sensing package 66 is used to detect the temperature of the refrigerant in the air intake pipe.

[0036] The liquid supply temperature sensing package 4 is used to detect the temperature of the coolant in the liquid supply pipeline.

[0037] The flow meter 5 is used to detect the coolant flow in the liquid supply pipeline.

[0038] The liquid outlet temperature sensing package 7 is used to detect the temperature of the coolant flowing out of the corresponding refrigeration module 6 .

[0039] The embodiment of the present application is a dual circulation of refrigerant and coolant, through which the heat generating equipment is cooled.

[0040] As for the refrigerant cycle, the refrigerant circulates between the compressor 61, the condenser 62, the throttle valve 63 and the plate heat exchanger 64. The branch pipeline corresponding to the refrigeration module 6 passes through the plate heat exchanger 64 in the refrigeration module 6, so that the coolant in the branch pipeline and the refrigerant in the circulation pipeline flow through the plate heat exchanger 64 respectively. The refrigerant exchanges heat with the coolant at the plate heat exchanger 64 to cool the coolant and discharge the heat absorbed by the coolant at the heat generating device. After evaporation and vaporization, the refrigerant enters the compressor 61, and then the refrigerant passes through the condenser 62 and the throttle valve 63 and reaches the plate heat exchanger 64 again, thereby forming a refrigeration cycle.

[0041] As for the coolant circulation, the coolant in the liquid storage tank 3 enters the liquid supply pipeline and flows toward the heat generating device, flows into the heat generating device from the liquid supply port 1, absorbs the heat generated by the heat generating device, flows out of the heat generating device from the liquid return port 2, and flows back to the liquid supply pipeline. The coolant that has absorbed the heat is diverted to each refrigeration module 6. At the plate heat exchanger 64 of each refrigeration module 6, the coolant that has absorbed the heat exchanges heat with the refrigerant in the refrigeration module 6. The coolant after cooling flows out of the refrigeration module 6, merges into the liquid supply pipeline, circulates to the heat generating device again, and continues to absorb the heat generated by the heat generating device.

[0042] The control module is used to control the coolant flow rate of the liquid supply pipeline and the coolant flow rate of each branch pipeline. The liquid supply proportional regulating valve 8 adjusts its opening degree under the control of the control module to adjust the coolant flow rate of the liquid supply pipeline. The shunt proportional regulating valve 9 adjusts its opening degree under the control of the control module to adjust the coolant flow rate of the branch pipeline.

[0043] The method for how the control module controls the coolant flow rate of the liquid supply pipeline and the coolant flow rate of each branch pipeline will be described in the subsequent liquid distribution control method and will not be elaborated here.

[0044] The embodiment of the present application provides a liquid distribution control method. The embodiment of the present application can be applied to the control module of the liquid cooling source unit, that is to say, the execution subject of the following liquid distribution control method is the control module of the liquid cooling source unit. As Figure 2 shown, it is a flowchart of the liquid distribution control method according to an embodiment of the present application.

[0045] Step S210, for each preset refrigeration module, detect the suction superheat temperature corresponding to the refrigeration module and adjust the coolant flow rate of the refrigeration module on the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module.

[0046] The refrigeration module is used to cool the coolant in the liquid cooling source unit, and this coolant is the coolant that has absorbed the heat released by the heat-generating equipment. Among them, each refrigeration module is connected in parallel to the liquid supply pipeline of the liquid cooling source unit through its corresponding branch pipeline, so that the coolant in the liquid supply pipeline can flow through the refrigeration module and then return to the liquid supply pipeline.

[0047] The suction superheat temperature refers to: the superheat degree of the refrigerant. The suction superheat temperature can be used to reflect whether the refrigerant in the plate heat exchanger is fully evaporated and heat-exchanged.

[0048] If the suction superheat temperature is too high, it reflects that although the refrigerant has been completely evaporated and gasified in the plate heat exchanger, it has absorbed too much heat, which means that the coolant flow rate of the branch pipeline corresponding to the refrigeration module is too large. In this case, it is necessary to reduce the coolant flow rate of the branch pipeline corresponding to the refrigeration module to avoid the increase of the evaporation pressure in the plate heat exchanger, resulting in the increase of the evaporation temperature of the refrigerant and the decrease of the refrigeration capacity of the refrigeration module.

[0049] The suction superheat temperature is too low, indicating that the refrigerant does not fully evaporate in the plate heat exchanger. This means that the heat transfer area of the refrigeration module is not fully utilized, and the refrigerant cannot exchange heat sufficiently, which implies that the coolant flow rate in the corresponding branch pipeline of the refrigeration module is too small. In this case, it is necessary to increase the coolant flow rate in the corresponding branch pipeline of the refrigeration module to enable the refrigerant in the plate heat exchanger to exchange heat sufficiently, avoid the reduction of the refrigeration capacity of the refrigeration module due to insufficient heat exchange of the refrigerant, and even avoid the problem of liquid carry-over in the compressor suction caused by incomplete evaporation of the refrigerant.

[0050] Step S220: Detect the coolant outlet temperature of each refrigeration module in the corresponding branch pipeline, and adjust the coolant flow rate of each refrigeration module in the corresponding branch pipeline according to the difference value between the coolant outlet temperatures of any two refrigeration modules.

[0051] The coolant outlet temperature refers to the temperature of the coolant after the refrigeration module cools down the coolant. The coolant here refers to the coolant that has absorbed the heat dissipated by the heat-generating equipment.

[0052] The difference value refers to the absolute value of the difference between the two coolant outlet temperatures. This difference value can reflect whether the temperatures of the refrigerants flowing out of the two refrigeration modules are similar. If the temperatures of the coolants flowing out of each refrigeration module are similar, the coolants flowing out of each refrigeration module will not perform secondary heat exchange in the supply pipeline. That is to say, there will be no problem of cold quantity loss due to the mixing of coolants at different temperatures from different refrigeration modules.

[0053] The difference value between the coolant outlet temperatures of any two refrigeration modules refers to the difference values between the coolant outlet temperatures of every two refrigeration modules among all refrigeration modules. That is to say, calculate the difference values of the coolant outlet temperatures of every two refrigeration modules.

[0054] In the embodiments of the present application, for each preset refrigeration module, the suction superheat temperature corresponding to the refrigeration module is detected, and according to the suction superheat temperature corresponding to the refrigeration module, the coolant flow rate of the refrigeration module on the corresponding branch pipeline is adjusted; the coolant outlet temperature of each refrigeration module on the corresponding branch pipeline is detected, and according to the difference value between the coolant outlet temperatures of any two refrigeration modules, the coolant flow rates of the respective refrigeration modules on the corresponding branch pipelines are adjusted. In the embodiments of the present application, according to the suction superheat temperature corresponding to the refrigeration module, the coolant flow rate of the refrigeration module on the corresponding branch pipeline is adjusted, which can avoid the problems of excessive or too small coolant flow rate in the branch pipeline, resulting in low refrigeration energy efficiency of the refrigeration module, maximize the refrigeration capacity of the refrigeration module, and can adjust the coolant flow rates of the respective refrigeration modules on the corresponding branch pipelines according to the difference value between the coolant outlet temperatures of any two refrigeration modules, so that the coolant outlet temperatures of the respective refrigeration modules are similar, avoid the problem of cold quantity loss caused by the secondary heat exchange of the coolant flowing out of the respective refrigeration modules in the supply pipeline, and improve the refrigeration capacity of the whole machine.

[0055] In order to make the liquid separation control method in the embodiments of the present application easier to understand, the liquid separation control method in the embodiments of the present application will be further described below.

[0056] In the embodiments of the present application, for each preset refrigeration module, the suction superheat temperature corresponding to the refrigeration module is detected.

[0057] Specifically, the suction pressure and suction temperature corresponding to the compressor in the refrigeration module can be detected; the evaporation temperature corresponding to the suction pressure is queried; the absolute value of the difference between the suction temperature and the evaporation temperature is determined as the suction superheat temperature corresponding to the refrigeration module.

[0058] The suction pressure refers to the gas pressure at the suction port of the compressor of the refrigeration module.

[0059] The suction temperature refers to the refrigerant temperature at the suction port of the compressor of the refrigeration module.

[0060] The evaporation temperature refers to the saturation temperature when the refrigerant changes from a liquid state to a gaseous state.

[0061] Further, a pressure sensor provided on the suction pipe of the compressor of the refrigeration module can be used to detect the suction pressure corresponding to the compressor; a suction temperature sensing package provided on the suction pipe of the compressor of the refrigeration module can be used to detect the suction temperature corresponding to the compressor.

[0062] Further, a correspondence table for recording the correspondence between the suction pressure and the evaporation temperature is preset in advance; in this correspondence table, the evaporation temperature corresponding to the suction pressure of the compressor in the refrigeration module is queried.

[0063] After obtaining the suction temperature and the evaporation temperature, calculate |suction temperature - evaporation temperature|, and determine the result as the suction superheat temperature.

[0064] In the embodiment of the present application, after determining the suction superheat temperature corresponding to the refrigeration module, the coolant flow rate of the refrigeration module in the corresponding branch pipeline can be adjusted according to the suction superheat temperature corresponding to the refrigeration module.

[0065] A first suction superheat threshold and a second suction superheat threshold are preset. Among them, the first suction superheat threshold is less than the second suction superheat threshold. Further, a target superheat degree and a floating value are preset. The target superheat degree refers to the temperature at which the refrigerant is fully evaporated. The floating value is used to define the temperature range in which it can be determined that the refrigerant is completely evaporated and gasified. Both the target superheat degree and the floating value are empirical values or values obtained through experiments. For example: the target superheat degree is taken as 5°C, and the floating value can be taken as a smaller value according to needs. Subtracting the floating value from the target superheat degree can obtain the first suction superheat threshold. Adding the floating value to the target superheat degree can obtain the second suction superheat threshold.

[0066] The first suction superheat threshold and the second suction superheat threshold are used to measure whether the suction superheat temperature corresponding to the refrigeration module is too high or too low.

[0067] When the suction superheat temperature is less than the preset first suction superheat threshold, it indicates that the current suction superheat temperature is too low. The coolant flow rate of the refrigeration module in the corresponding branch pipeline can be increased according to the preset first gradient value, so that the refrigerant in the plate heat exchanger can be fully heat-exchanged, the refrigeration capacity of the refrigeration module can be improved, and the problem of liquid carry-over at the compressor due to insufficient evaporation of the refrigerant can be avoided.

[0068] When the suction superheat temperature is greater than the preset second suction superheat threshold, it indicates that the current suction superheat temperature is too high. The coolant flow rate of the refrigeration module in the corresponding branch pipeline can be reduced according to the first gradient value, avoiding excessive heat absorption of the refrigerant in the plate heat exchanger, reducing the evaporation pressure of the refrigerant in the plate heat exchanger, increasing the temperature difference between the evaporated refrigerant and the coolant, and improving the heat exchange capacity of the refrigeration module.

[0069] When the suction superheat temperature is greater than or equal to the first suction superheat threshold and less than or equal to the second suction superheat threshold, it indicates that the current suction superheat temperature is appropriate, and the coolant flow rate of the refrigeration module in the corresponding branch pipeline can be maintained.

[0070] Further, the first gradient value is the basis for adjusting the coolant flow rate of the branch pipeline each time. That is to say, when adjusting the coolant flow rate of the branch pipeline, the first gradient value is adjusted each time. The first gradient value can be an empirical value or a value obtained through experiments.

[0071] Further, when adjusting the coolant flow rate of the refrigeration module on the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module, the control module can adjust the coolant flow rate of the refrigeration module on the corresponding branch pipeline by adjusting the opening degree of the shunt ratio regulating valve of the refrigeration module on the corresponding branch pipeline. Among them, the opening degree change value of the shunt ratio regulating valve corresponding to the first gradient value can be determined in advance. When adjusting the coolant flow rate of the refrigeration module on the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module, the opening degree value of the shunt ratio regulating valve of the refrigeration module on the corresponding branch pipeline is adjusted according to the opening degree change value.

[0072] For example: when increasing the coolant flow rate of the refrigeration module on the corresponding branch pipeline, the opening degree value of the shunt ratio regulating valve on this branch pipeline is increased according to the opening degree change value; when decreasing the coolant flow rate of the refrigeration module on the corresponding branch pipeline, the opening degree value of the shunt ratio regulating valve on this branch pipeline is decreased according to the opening degree change value.

[0073] In the embodiment of the present application, after adjusting the coolant flow rate of the branch pipeline corresponding to the refrigeration module according to the suction superheat temperature corresponding to the refrigeration module, the coolant flow rate of the liquid supply pipeline can also be detected; in the case where the coolant flow rate of the liquid supply pipeline is inconsistent with the preset target liquid supply flow rate, the coolant flow rate of the liquid supply pipeline is adjusted to the target liquid supply flow rate.

[0074] The target liquid supply volume refers to the optimal coolant flow rate of the liquid supply pipeline. The target liquid supply volume is an empirical value or a value obtained through experiments.

[0075] Further, a flow meter provided on the liquid supply pipeline can be used to detect the coolant flow rate of the liquid supply pipeline; in the case where the coolant flow rate of the liquid supply pipeline is inconsistent with the preset target liquid supply flow rate, the coolant flow rate of the liquid supply pipeline is adjusted to the target liquid supply flow rate by adjusting the opening degree of the liquid supply ratio regulating valve provided on the liquid supply pipeline. In other words, the flow meter detects the coolant flow rate of the liquid supply pipeline and reports it to the control module; the control module adjusts the opening degree of the liquid supply ratio regulating valve provided when the coolant flow rate of the liquid supply pipeline is inconsistent with the preset target liquid supply flow rate, and adjusts the coolant flow rate of the liquid supply pipeline to the target liquid supply flow rate.

[0076] Further, when the coolant flow rate in the liquid supply pipeline is greater than the target liquid supply flow rate, the opening degree of the liquid supply proportional regulating valve is reduced. When the coolant flow rate in the liquid supply pipeline is less than the target liquid supply flow rate, the opening degree of the liquid supply proportional regulating valve is increased. When the coolant flow rate in the liquid supply pipeline is equal to the target liquid supply flow rate, the opening degree of the liquid supply proportional regulating valve is maintained. Among them, the adjustment amount can be preset, and according to this adjustment amount, the opening degree value of the liquid supply proportional regulating valve is adjusted. When the opening degree of the liquid supply proportional regulating valve increases, the coolant in the liquid storage tank will be replenished into the liquid supply pipeline; when the opening degree of the liquid supply proportional regulating valve decreases, the excess coolant in the liquid supply pipeline will return to the liquid storage tank. By adjusting the coolant flow rate in the liquid supply pipeline in the embodiment of the present application, the coolant flow rate in the liquid supply pipeline can be ensured to be moderate.

[0077] In the embodiment of the present application, in order to avoid secondary heat exchange of the coolant flowing into the liquid supply pipeline from the branch pipeline, after adjusting the coolant flow rate of the branch pipeline corresponding to the refrigeration module according to the suction superheat temperature corresponding to the refrigeration module, the coolant outlet temperature of each refrigeration module on the corresponding branch pipeline can be detected, and according to the difference value between the coolant outlet temperatures of any two refrigeration modules, the coolant flow rates of each refrigeration module on the corresponding branch pipelines are adjusted respectively.

[0078] Further, for each refrigeration module, the coolant outlet temperature of the refrigeration module on the corresponding branch pipeline can be detected by using the liquid outlet temperature sensing package arranged at the coolant outlet of the plate heat exchanger of the refrigeration module.

[0079] In the embodiment of the present application, the coolant flow rate of the branch pipeline can be adjusted in two stages. The first stage is to roughly adjust the coolant flow rate of the refrigeration module on the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module, so as to improve the refrigeration capacity of the refrigeration module. The second stage is that after detecting the coolant outlet temperature of each refrigeration module on the corresponding branch pipeline, according to the difference value between the coolant outlet temperatures of any two refrigeration modules, the coolant flow rates of each refrigeration module on the corresponding branch pipelines are finely adjusted respectively, so that the temperatures of the coolant in each branch pipeline are similar, avoiding the problem of secondary heat exchange of the coolant flowing out of the refrigeration module in the liquid supply pipeline and reducing the refrigeration efficiency.

[0080] The process of finely adjusting the coolant flow rate of each branch pipeline is described below. Figure 3 It is a step flow chart for finely adjusting the coolant flow rate of the branch pipeline according to an embodiment of the present application.

[0081] Step S310, determine the first difference value between the coolant outlet temperatures of any two of the refrigeration modules.

[0082] The first difference value is the absolute value of the difference between the coolant outlet temperatures of two refrigeration modules.

[0083] Determining the first difference value between the coolant outlet temperatures of any two of the refrigeration modules means: determining the first difference values between the coolant outlet temperatures of each pair of the refrigeration modules.

[0084] Step S320: Determine whether each of the first difference values is less than or equal to a preset first difference threshold; if so, execute step S330; if not, execute step S340.

[0085] The first difference threshold is used to measure whether the coolant outlet temperatures are close to each other.

[0086] The first difference threshold is an empirical value or a value obtained through experiments. Among them, the first difference threshold can be set to a relatively small value as needed. For example, the first difference threshold is set to 1°C.

[0087] Step S330: When each of the first difference values is less than or equal to the preset first difference threshold, maintain the coolant flow rates of each of the refrigeration modules in the corresponding branch pipelines.

[0088] If each of the first difference values is less than or equal to the preset first difference threshold, it means that the coolant outlet temperatures of each refrigeration module are basically the same, and the coolant flowing into the supply pipeline from each branch pipeline will basically not undergo secondary heat exchange. That is to say, it will not affect the refrigeration capacity of the liquid cooling source unit due to the secondary heat exchange of the refrigerant flowing into the supply pipeline from each branch pipeline.

[0089] Step S340: When at least one of the first difference values is greater than the first difference threshold, detect the coolant supply temperature of the supply pipeline at a position after the coolant in each of the branch pipelines has flowed into the supply pipeline.

[0090] If at least one of the first difference values is greater than the first difference threshold, it means that the coolant outlet temperatures of at least two refrigeration modules differ greatly. In this way, the coolant in each branch pipeline will undergo secondary heat exchange after flowing into the supply pipeline, which will affect the refrigeration capacity of the liquid cooling source unit. At this time, it is necessary to finely adjust the coolant flow rates of each branch pipeline according to the coolant supply temperature of the supply pipeline, so as to finely adjust the temperature of the coolant in each branch pipeline through the heat exchange process between the refrigerant and the coolant, so that the first difference value between the coolant outlet temperatures of any two refrigeration modules is less than the first difference threshold.

[0091] Step S350: Adjust the coolant flow rate of each refrigeration module in the corresponding branch pipeline according to the difference between the coolant outlet temperature of each refrigeration module and the coolant supply temperature of the supply pipeline.

[0092] Adjust the coolant flow rate of each refrigeration module in the corresponding branch pipeline according to the difference between the coolant outlet temperature of each refrigeration module and the coolant supply temperature of the supply pipeline, so that there is no large temperature difference in the coolant outlet temperature of each refrigeration module, and avoid secondary heat exchange of the coolant flowing out of each refrigeration module.

[0093] The following provides two ways to adjust the coolant flow rate of each refrigeration module in the corresponding branch pipeline. Of course, the following two ways are only used to illustrate the embodiments of the present application and are not used to limit the embodiments of the present application.

[0094] Method 1: The second difference value between the coolant outlet temperature of each refrigeration module and the coolant supply temperature can be determined; for the refrigeration module whose second difference value is less than or equal to the preset second difference threshold, maintain the coolant flow rate of the refrigeration module in the corresponding branch pipeline; for the refrigeration module whose second difference value is greater than the second difference threshold, when the coolant outlet temperature corresponding to the refrigeration module is greater than the coolant supply temperature, reduce the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the preset second gradient value; when the coolant outlet temperature corresponding to the refrigeration module is less than the coolant supply temperature, increase the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the second gradient value.

[0095] The second difference value is the absolute value of the difference between the coolant outlet temperature of the refrigeration module and the coolant supply temperature of the supply pipeline.

[0096] The second difference threshold is used to measure whether the coolant outlet temperature corresponding to the refrigeration module is close to the coolant supply temperature corresponding to the supply pipeline. The second difference threshold is an empirical value or a value obtained through experiments. Among them, the second difference threshold can be set to a relatively small value according to needs.

[0097] The second gradient value is the basis for adjusting the coolant flow rate of the branch pipeline each time. Further, the first gradient value is the basis for adjusting the coolant flow rate of the branch pipeline in the first stage, and the second gradient value is the basis for adjusting the coolant flow rate of the branch pipeline in the second stage. Among them, the second gradient value is less than the first gradient value.

[0098] Further, when the second difference value is less than or equal to the second difference threshold, it indicates that the coolant outlet temperature is close to the coolant supply temperature, and there is no need to finely adjust the coolant flow rate of the branch pipeline. When the second difference value is greater than the second difference threshold, it indicates that there is a significant difference between the coolant outlet temperature and the coolant supply temperature, and the coolant flow rate of the branch pipeline needs to be finely adjusted. When adjusting the coolant flow rate of the branch pipeline, if the coolant outlet temperature corresponding to the refrigeration module is greater than the coolant supply temperature, it indicates that the coolant flow rate of this branch pipeline is too high, and the coolant flow rate needs to be reduced so that the refrigerant can take away more heat from the coolant to make the coolant outlet temperature closer to the coolant supply temperature. If the coolant outlet temperature corresponding to the refrigeration module is less than the coolant supply temperature, it indicates that the coolant flow rate of the branch pipeline corresponding to this refrigeration module is too low, and the coolant flow rate needs to be increased to raise the coolant outlet temperature.

[0099] In the second method, for each refrigeration module, when the coolant outlet temperature of the refrigeration module is greater than the coolant supply temperature, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is adjusted downward according to a preset second gradient value; when the coolant outlet temperature of the refrigeration module is less than the coolant supply temperature, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is adjusted upward according to the second gradient value.

[0100] Further, when the coolant outlet temperature is greater than the coolant supply temperature, it indicates that the coolant flow rate of the branch pipeline is relatively high with respect to the heat exchange surface of the plate heat exchanger. That is to say, the heat exchange of the refrigerant is insufficient and the heat taken away is not enough, resulting in a relatively high coolant outlet temperature. At this time, the coolant flow rate of the branch pipeline needs to be reduced. When the coolant outlet temperature is less than the coolant supply temperature, it indicates that the refrigerant has taken away more heat from the coolant, and the coolant flow rate of the branch pipeline needs to be increased.

[0101] In the embodiments of the present application, since the amount of coolant in the supply pipeline is greater than the amount of coolant in each branch pipeline, it is possible that the coolant outlet temperatures corresponding to each refrigeration module are all greater than the coolant supply temperature, the coolant outlet temperatures corresponding to each refrigeration module are all less than the coolant supply temperature, and among the coolant outlet temperatures corresponding to each refrigeration module, there are both coolant outlet temperatures greater than the coolant supply temperature and coolant outlet temperatures less than the coolant supply temperature.

[0102] When the coolant outlet temperatures corresponding to each of the refrigeration modules are all greater than the coolant supply temperature, or when the coolant outlet temperatures corresponding to each of the refrigeration modules are all less than the coolant supply temperature, a second difference value between the coolant outlet temperature and the coolant supply temperature of each of the refrigeration modules is determined; for a refrigeration module with a second difference value less than or equal to a preset second difference threshold, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is maintained; for a refrigeration module with a second difference value greater than the second difference threshold, when the coolant outlet temperature corresponding to the refrigeration module is greater than the coolant supply temperature, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is reduced according to a preset second gradient value; when the coolant outlet temperature corresponding to the refrigeration module is less than the coolant supply temperature, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is increased according to the second gradient value.

[0103] When among the coolant outlet temperatures corresponding to each refrigeration module, there are coolant outlet temperatures greater than the coolant supply temperature, there are also coolant outlet temperatures less than the coolant supply temperature, and there are also coolant outlet temperatures less than the coolant supply temperature, for each of the refrigeration modules, when the coolant outlet temperature of the refrigeration module is greater than the coolant supply temperature, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is adjusted downward according to a preset second gradient value; when the coolant outlet temperature of the refrigeration module is less than the coolant supply temperature, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is adjusted upward according to the second gradient value.

[0104] In an embodiment of the present application, during the process of finely adjusting the coolant flow rate of each branch pipeline, the second difference value between the coolant outlet temperature and the coolant supply temperature of each of the refrigeration modules is monitored. After finely adjusting the coolant flow rate of each branch pipeline, it is necessary to make the second difference value between the coolant outlet temperature and the coolant supply temperature of each of the refrigeration modules less than or equal to the second difference threshold.

[0105] In an embodiment of the present application, whether it is coarsely adjusting the coolant flow rate of the branch pipeline or finely adjusting the coolant flow rate of the branch pipeline, the coolant flow rate of the refrigeration module in the corresponding branch pipeline can be adjusted by adjusting the opening degree of the shunt ratio regulating valve of the refrigeration module in the corresponding branch pipeline, so as to realize the precise control of the coolant flow rate of each branch pipeline.

[0106] In an embodiment of the present application, the liquid separation control method of the present application can be executed once every preset time period. Among them, each step can be executed according to its corresponding time period.

[0107] The first operation can be performed every preset first time period; the first operation includes: for each preset refrigeration module, detecting the suction superheat temperature corresponding to the refrigeration module and adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module.

[0108] The second operation can be performed every preset second time period; the second operation includes: detecting the coolant outlet temperature of each refrigeration module in the corresponding branch pipeline, and adjusting the coolant flow rate of each refrigeration module in the corresponding branch pipeline according to the difference value between the coolant outlet temperatures of any two refrigeration modules.

[0109] The time lengths of the first time period and the second time period can be different. Among them, the time length of the first time period can be greater than the time length of the second time period.

[0110] When the execution times of the first operation and the second operation are the same, the first operation is preferentially executed. Further, after preferentially executing the first operation, the timing of the first time period and the second time period is restarted, and the first operation is executed every preset first time period and the second operation is executed every preset second time period again.

[0111] Based on the above description of the structure of the liquid cooling source unit and the above description of the liquid separation control method, a more specific example is provided below. In this example, a liquid cooling source unit with 3 refrigeration modules is taken as an example.

[0112] In each refrigeration module, an outlet temperature sensor is arranged at the coolant outlet of the plate heat exchanger (or on the branch pipeline connecting the coolant outlet of the plate heat exchanger) to detect the coolant outlet temperature; a suction temperature sensor is arranged on the suction pipe of the compressor to detect the suction temperature T of the compressor s ; a pressure sensor is also arranged on the suction pipe of the compressor to detect the suction pressure P of the compressor s . A shunt proportional regulating valve is arranged on the branch pipeline corresponding to each refrigeration module to regulate the coolant flow rate of the branch pipeline. A supply temperature sensor is arranged on the supply pipeline, and the supply temperature sensor is located between the supply port and the branch pipeline interface closest to the supply port to detect the coolant supply temperature T supply after the coolant is mixed. A supply proportional regulating valve is also arranged on the supply pipeline to regulate the coolant flow rate of the supply pipeline. A flow meter is also arranged on the supply pipeline to measure the coolant flow rate of the supply pipeline.

[0113] Preset the target superheat to Tsuperheat and the floating value ΔT0. Then, Tsuperheat - ΔT0 is the first suction superheat threshold, and Tsuperheat + ΔT0 is the second suction superheat threshold. After the liquid-cooled source unit starts up and runs stably, for each refrigeration module, the suction temperature T of this refrigeration module is detected in real time s and the suction pressure P s , and, query the saturation temperature (i.e., evaporation temperature) corresponding to the suction pressure P s ; calculate the absolute value of the difference between the suction temperature T s and the evaporation temperature, and use it as the suction superheat T si (i = 1, 2, 3).

[0114] It is possible to judge the magnitude relationship between T si and Tsuperheat every first time period t1 to adjust the coolant flow rate of each refrigeration module.

[0115] a) When T si <Tsuperheat - ΔT0, it means that the refrigerant in the refrigeration module i fails to fully evaporate and gasify, and the coolant flow rate allocated to its branch pipeline is too low. Increase the opening of the shunt ratio regulating valve i corresponding to this branch pipeline by K1 (the opening change value corresponding to the first gradient value).

[0116] b) When T si >Tsuperheat + ΔT0, it means that the coolant flow rate allocated to the branch pipeline corresponding to the refrigeration module i is too high. Close the opening of the shunt ratio regulating valve i corresponding to this branch pipeline by K1.

[0117] c) When Tsuperheat - ΔT0 ≤ T si ≤ Tsuperheat + ΔT0, it means that the coolant flow rate allocated to the refrigeration module i is appropriate, and the shunt ratio regulating valve i corresponding to this branch pipeline can maintain the current state.

[0118] Preset the target liquid supply flow rate, that is, the size of the coolant flow rate that the liquid supply pipeline needs to maintain. After the branch ratio regulating valves of each branch pipeline are roughly adjusted, use a flow meter to detect the coolant flow rate of the liquid supply pipeline, judge the magnitude relationship between the coolant flow rate of the liquid supply pipeline and the target liquid supply flow rate, and adjust the coolant flow rate of the liquid supply pipeline by adjusting the liquid supply ratio regulating valve to make the coolant flow rate of the liquid supply pipeline consistent with the target liquid supply flow rate.

[0119] After the rough adjustment of the coolant flow rate of each branch pipeline is completed, it is possible to detect the coolant outlet temperature T of each refrigeration module i (i = 1, 2, 3) every second time period t2 (t1 > t2) i(i.e., T1, T2, T3), calculate the difference values between the coolant outlet temperatures of any two refrigeration modules respectively, i.e., |T1 - T2|, |T1 - T3|, and |T2 - T3|, and adjust the coolant outlet temperatures of each refrigeration module according to |T1 - T2|, |T1 - T3|, and |T2 - T3|, that is, finely adjust the coolant flow rates of each refrigeration module in the corresponding branch pipelines.

[0120] Preset a first difference threshold ΔT1 and a second difference threshold ΔT1, and compare each difference value |T1 - T2|, |T1 - T3|, and |T2 - T3| with the first difference threshold ΔT1 respectively:

[0121] a) If the difference values |T1 - T2|, |T1 - T3|, and |T2 - T3| are all less than or equal to ΔT1, each branch proportional regulating valve continues to operate in the current state, that is, maintain the coolant flow rates of each refrigeration module in the corresponding branch pipelines.

[0122] b) If at least one of the difference values |T1 - T2|, |T1 - T3|, and |T2 - T3| is greater than ΔT1, use the supply temperature sensor package set on the supply pipeline to detect the coolant supply temperature Tsupply of the supply pipeline, and judge the magnitude relationship between the coolant outlet temperatures T1, T2, and T3 and the coolant supply temperature Tsupply respectively.

[0123] 1) In the case where among the coolant outlet temperatures T1, T2, and T3, there are coolant outlet temperatures greater than Tsupply, coolant outlet temperatures equal to Tsupply, and coolant outlet temperatures less than Tsupply, if the coolant outlet temperature T i is greater than Tsupply, it means that the coolant flow rate of the branch pipeline corresponding to this coolant outlet temperature T i is relatively high, and close the opening of the branch proportional regulating valve corresponding to this branch pipeline by K2 (the opening change value corresponding to the second gradient value, where K2 < K1); if the coolant outlet temperature T i is less than Tsupply, it means that the coolant flow rate of the branch pipeline corresponding to this coolant outlet temperature T i is relatively low, open the opening of the branch proportional regulating valve corresponding to this branch pipeline by K2, and then continuously detect |T1 - T2|, |T1 - T3|, and |T2 - T3| until all of |T1 - T2|, |T1 - T3|, and |T2 - T3| are less than ΔT1.

[0124] 2) When the coolant outlet temperatures T1, T2, and T3 are all less than T supply, calculate |T supply - T1|, |T supply - T2|, and |T supply - T3| respectively. If |T supply - T1|, |T supply - T2|, and |T supply - T3| are all less than or equal to ΔT2, maintain the current state of each branch proportional regulating valve unchanged, that is: maintain the coolant flow rate of each refrigeration module in the corresponding branch pipeline. If there is a difference value greater than ΔT2 among |T supply - T1|, |T supply - T2|, and |T supply - T3|, it means that the coolant flow rate of the branch pipeline corresponding to this difference value is too low. Open the branch proportional regulating valve corresponding to this branch pipeline by K2 to improve the heat exchange efficiency of the refrigeration module, so that the refrigerant of this refrigeration module is fully heat exchanged, and then continuously detect |T1 - T2|, |T1 - T3|, and |T2 - T3| until all of |T1 - T2|, |T1 - T3|, and |T2 - T3| are less than ΔT1.

[0125] 3) When the coolant outlet temperatures T1, T2, and T3 are all greater than T supply, calculate |T supply - T1|, |T supply - T2|, and |T supply - T3| respectively. If |T supply - T1|, |T supply - T2|, and |T supply - T3| are all ≤ ΔT2, maintain the current state of each branch proportional regulating valve unchanged, that is: maintain the coolant flow rate of each refrigeration module in the corresponding branch pipeline. If there is a difference value greater than ΔT2 among |T supply - T1|, |T supply - T2|, and |T supply - T3|, it means that the coolant flow rate of the branch pipeline corresponding to this difference value is too high. Close the branch proportional regulating valve corresponding to this branch pipeline by K2, and then continuously detect |T1 - T2|, |T1 - T3|, and |T2 - T3| until all of |T1 - T2|, |T1 - T3|, and |T2 - T3| are less than ΔT1.

[0126] When it is detected that the execution times of t1 and t2 are the same, the method of adjusting the coolant flow rate according to the suction superheat temperature (the first operation) has a higher priority than the method of adjusting the coolant flow rate according to the coolant outlet temperature (the second operation).

[0127] Through the above liquid separation control method, the difference between the coolant outlet temperatures T1, T2, and T3 of each refrigeration module can be adjusted to a controllable range, ensuring that the coolant outlet temperatures of each refrigeration module are uniform, so as to fully exert the refrigeration capacity of the refrigeration module and the liquid cooling source unit.

[0128] The control module in the liquid cooling source unit provided by the embodiment of the present application is used to execute the above liquid separation control method. The control module can respectively adjust the coolant flow rate of each branch pipeline and the coolant flow rate of the supply pipeline.

[0129] The liquid cooling source unit further includes: a flow meter and a liquid supply proportional regulating valve arranged on the liquid supply pipeline; the flow meter detects the coolant flow rate of the liquid supply pipeline and reports it to the control module; when the coolant flow rate of the liquid supply pipeline is inconsistent with a preset target liquid supply flow rate, the control module adjusts the opening degree of the liquid supply proportional regulating valve to adjust the coolant flow rate of the liquid supply pipeline to the target liquid supply flow rate.

[0130] The liquid cooling source unit further includes; a plurality of shunt proportional regulating valves respectively arranged on different branch pipelines; the control module adjusts the coolant flow rate of the refrigeration module on the corresponding branch pipeline by adjusting the opening degree of the shunt proportional regulating valve of the refrigeration module on the corresponding branch pipeline.

[0131] That is to say, the control module can adjust the coolant flow rate of the branch pipeline by controlling the opening degree of the shunt proportional regulating valve, and can adjust the coolant flow rate of the liquid supply pipeline by controlling the opening degree of the liquid supply proportional regulating valve.

[0132] The embodiment of the present application also provides a liquid distribution control device. This liquid distribution control device can be arranged in the control module of the above-mentioned liquid cooling source unit. As Figure 4 shown, it is a structural diagram of a liquid distribution control device according to an embodiment of the present application.

[0133] This liquid distribution control device includes:

[0134] A first adjustment module 410, which is used for each preset refrigeration module to detect the suction superheat temperature corresponding to the refrigeration module and adjust the coolant flow rate of the refrigeration module on the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module.

[0135] A second adjustment module 420, which is used to detect the coolant outlet temperature of each refrigeration module on the corresponding branch pipeline, and adjust the coolant flow rate of each refrigeration module on the corresponding branch pipeline respectively according to the difference value between the coolant outlet temperatures of any two refrigeration modules.

[0136] The functions of the device described in the embodiment of the present application have been described in the above method embodiment. Therefore, for the details not described in this embodiment, reference can be made to the relevant descriptions in the foregoing embodiments, and no further elaboration will be made here.

[0137] The embodiment of the present application also provides a liquid distribution control equipment, as Figure 5 shown, it is a structural diagram of a liquid distribution control equipment according to an embodiment of the present application.

[0138] The liquid separation control device includes: a processor 510, a communication interface 520, a memory 530, and a communication bus 540. Among them, the processor 510, the communication interface 520, and the memory 530 communicate with each other through the communication bus 540.

[0139] The memory 530 is used to store computer programs.

[0140] In an embodiment of the present application, when the processor 510 is used to execute the program stored on the memory 530, the liquid separation control method provided by any one of the foregoing method embodiments is implemented, including: for each preset refrigeration module, detecting the suction superheat temperature corresponding to the refrigeration module and adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module; detecting the coolant outlet temperature of each refrigeration module in the corresponding branch pipeline, and adjusting the coolant flow rate of each refrigeration module in the corresponding branch pipeline respectively according to the difference value between the coolant outlet temperatures of any two refrigeration modules.

[0141] Among them, the detecting the suction superheat temperature corresponding to the refrigeration module includes: detecting the suction pressure and suction temperature corresponding to the compressor in the refrigeration module; querying the evaporation temperature corresponding to the suction pressure; and determining the absolute value of the difference between the suction temperature and the evaporation temperature as the suction superheat temperature corresponding to the refrigeration module.

[0142] Among them, the adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module includes: when the suction superheat temperature is less than a preset first suction superheat threshold, increasing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to a preset first gradient value; when the suction superheat temperature is greater than a preset second suction superheat threshold, decreasing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the first gradient value; where the first suction superheat threshold is less than the second suction superheat threshold; and when the suction superheat temperature is greater than or equal to the first suction superheat threshold and less than or equal to the second suction superheat threshold, maintaining the coolant flow rate of the refrigeration module in the corresponding branch pipeline.

[0143] Among them, adjusting the coolant flow rates of each of the refrigeration modules in the corresponding branch pipelines according to the difference value between the coolant outlet temperatures of any two of the refrigeration modules includes: determining a first difference value between the coolant outlet temperatures of any two of the refrigeration modules; when each of the first difference values is less than or equal to a preset first difference threshold, maintaining the coolant flow rates of each of the refrigeration modules in the corresponding branch pipelines; when at least one of the first difference values is greater than the first difference threshold, detecting the coolant supply temperature of the supply pipeline at a position after the coolants in each of the branch pipelines merge into the supply pipeline; and adjusting the coolant flow rates of each of the refrigeration modules in the corresponding branch pipelines according to the differences between the coolant outlet temperatures of each of the refrigeration modules and the coolant supply temperature of the supply pipeline.

[0144] Among them, adjusting the coolant flow rates of each of the refrigeration modules in the corresponding branch pipelines according to the differences between the coolant outlet temperatures of each of the refrigeration modules and the coolant supply temperature of the supply pipeline includes: determining second difference values between the coolant outlet temperatures of each of the refrigeration modules and the coolant supply temperature respectively; for a refrigeration module with a second difference value less than or equal to a preset second difference threshold, maintaining the coolant flow rate of the refrigeration module in the corresponding branch pipeline; for a refrigeration module with a second difference value greater than the second difference threshold, when the coolant outlet temperature of the refrigeration module is greater than the coolant supply temperature, reducing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to a preset second gradient value; and when the coolant outlet temperature of the refrigeration module is less than the coolant supply temperature, increasing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the second gradient value.

[0145] Among them, adjusting the coolant flow rates of each of the refrigeration modules in the corresponding branch pipelines according to the differences between the coolant outlet temperatures of each of the refrigeration modules and the coolant supply temperature of the supply pipeline includes: for each of the refrigeration modules, when the coolant outlet temperature of the refrigeration module is greater than the coolant supply temperature, reducing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to a preset second gradient value; and when the coolant outlet temperature of the refrigeration module is less than the coolant supply temperature, increasing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the second gradient value.

[0146] Among them, after adjusting the coolant flow rate of the branch pipeline corresponding to the refrigeration module according to the suction superheat temperature corresponding to the refrigeration module, it further includes: detecting the coolant flow rate of the liquid supply pipeline; when the coolant flow rate of the liquid supply pipeline is inconsistent with the preset target liquid supply flow rate, adjusting the opening degree of the liquid supply ratio regulating valve arranged on the liquid supply pipeline to adjust the coolant flow rate of the liquid supply pipeline to the target liquid supply flow rate.

[0147] Among them, adjusting the coolant flow rate of the refrigeration module on the corresponding branch pipeline includes: adjusting the opening degree of the shunt ratio regulating valve of the refrigeration module on the corresponding branch pipeline to adjust the coolant flow rate of the refrigeration module on the corresponding branch pipeline.

[0148] The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the liquid separation control method provided in any of the foregoing method embodiments. Since the liquid separation control method has been described in detail above, for the parts not elaborated in the description of this embodiment, reference can be made to the relevant descriptions in the foregoing embodiments and will not be repeated here.

[0149] The device embodiments described above are merely illustrative. The units described as separation components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0150] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution or the part that contributes to the related technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disc, etc., including several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0151] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an execution order is expressly specified. It should also be understood that additional or alternative steps may be used.

[0152] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will conform to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A liquid separation control method, characterized in that, Including: For each preset refrigeration module, detecting the suction superheat temperature corresponding to the refrigeration module and adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module; Detecting the coolant outlet temperature of each refrigeration module in the corresponding branch pipeline, and adjusting the coolant flow rate of each refrigeration module in the corresponding branch pipeline respectively according to the difference value between the coolant outlet temperatures of any two refrigeration modules.

2. The method according to claim 1, wherein The detecting the suction superheat temperature corresponding to the refrigeration module includes: Detecting the suction pressure and suction temperature corresponding to the compressor in the refrigeration module; Querying the evaporation temperature corresponding to the suction pressure; Determining the absolute value of the difference between the suction temperature and the evaporation temperature as the suction superheat temperature corresponding to the refrigeration module.

3. The method according to claim 1, wherein The adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module includes: In the case where the suction superheat temperature is less than a preset first suction superheat threshold, increasing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to a preset first gradient value; In the case where the suction superheat temperature is greater than a preset second suction superheat threshold, decreasing the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the first gradient value; wherein, the first suction superheat threshold is less than the second suction superheat threshold; In the case where the suction superheat temperature is greater than or equal to the first suction superheat threshold and less than or equal to the second suction superheat threshold, maintaining the coolant flow rate of the refrigeration module in the corresponding branch pipeline.

4. The method according to claim 1, characterized in that The adjusting the coolant flow rate of each refrigeration module in the corresponding branch pipeline respectively according to the difference value between the coolant outlet temperatures of any two refrigeration modules includes: Determining a first difference value between the coolant outlet temperatures of any two refrigeration modules; In the case where each of the first difference values is less than or equal to a preset first difference threshold, maintaining the coolant flow rate of each refrigeration module in the corresponding branch pipeline respectively; In the case where at least one of the first difference values is greater than the first difference threshold, detecting the coolant supply temperature of the supply pipeline at a position after the coolant in each branch pipeline converges into the supply pipeline; adjusting the coolant flow rate of each refrigeration module in the corresponding branch pipeline respectively according to the difference between the coolant outlet temperature of each refrigeration module and the coolant supply temperature of the supply pipeline.

5. The method according to claim 4, wherein The adjusting the coolant flow rate of each refrigeration module in the corresponding branch pipeline respectively according to the difference between the coolant outlet temperature of each refrigeration module and the coolant supply temperature of the supply pipeline includes: Determining a second difference value between the coolant outlet temperature of each refrigeration module and the coolant supply temperature respectively; For the refrigeration module with the second difference value less than or equal to a preset second difference threshold, maintaining the coolant flow rate of the refrigeration module in the corresponding branch pipeline; For a refrigeration module where the second difference value is greater than the second difference threshold, when the coolant outlet temperature corresponding to the refrigeration module is greater than the coolant supply temperature, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is reduced according to a preset second gradient value; when the coolant outlet temperature corresponding to the refrigeration module is less than the coolant supply temperature, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is increased according to the second gradient value.

6. The method according to claim 4, wherein Adjusting the coolant flow rates of the respective refrigeration modules in the corresponding branch pipelines according to the differences between the coolant outlet temperatures of the respective refrigeration modules and the coolant supply temperature of the supply pipeline includes: For each refrigeration module, when the coolant outlet temperature of the refrigeration module is greater than the coolant supply temperature, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is adjusted downward according to a preset second gradient value; when the coolant outlet temperature of the refrigeration module is less than the coolant supply temperature, the coolant flow rate of the refrigeration module in the corresponding branch pipeline is adjusted upward according to the second gradient value.

7. The method according to any one of claims 1-6, characterized in that, After adjusting the coolant flow rate of the branch pipeline corresponding to the refrigeration module according to the suction superheat temperature corresponding to the refrigeration module, it further includes: Detecting the coolant flow rate of the supply pipeline; When the coolant flow rate of the supply pipeline is inconsistent with a preset target supply flow rate, the coolant flow rate of the supply pipeline is adjusted to the target supply flow rate by adjusting the opening degree of the supply ratio regulating valve provided on the supply pipeline.

8. The method according to any one of claims 1-6, characterized in that, Adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline includes: Adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline by adjusting the opening degree of the shunt ratio regulating valve of the refrigeration module in the corresponding branch pipeline.

9. A liquid separation control device, characterized in that, Including: A first adjustment module for detecting the suction superheat temperature corresponding to each preset refrigeration module and adjusting the coolant flow rate of the refrigeration module in the corresponding branch pipeline according to the suction superheat temperature corresponding to the refrigeration module; A second adjustment module for detecting the coolant outlet temperature of each refrigeration module in the corresponding branch pipeline and adjusting the coolant flow rates of the respective refrigeration modules in the corresponding branch pipelines according to the difference value between the coolant outlet temperatures of any two refrigeration modules.

10. A liquid cooling source unit, characterized in that, The liquid-cooled source unit includes: a control module; the control module is used to execute the liquid distribution control method according to any one of claims 1-8.

11. The liquid cooling source unit according to claim 10, wherein The liquid-cooled source unit further includes: a flow meter and a supply ratio regulating valve provided on the supply pipeline; The flow meter detects the coolant flow rate of the supply pipeline and reports it to the control module; When the coolant flow rate of the supply pipeline is inconsistent with a preset target supply flow rate, the control module adjusts the opening degree of the supply ratio regulating valve to adjust the coolant flow rate of the supply pipeline to the target supply flow rate.

12. The liquid cooling source unit according to claim 10 or 11, characterized in that, The liquid-cooled source unit further includes; a plurality of shunt ratio regulating valves respectively provided on different branch pipelines; The control module adjusts the coolant flow rate of the refrigeration module in the corresponding branch pipeline by adjusting the opening degree of the shunt ratio regulating valve of the refrigeration module in the corresponding branch pipeline.

13. A liquid separation control device, characterized in that, Comprising: At least one communication interface; At least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; At least one memory connected to the at least one bus, wherein the processor is configured to: execute the liquid separation control program stored in the memory to implement the liquid separation control method according to any one of claims 1-8.

14. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed to implement the liquid separation control method according to any one of claims 1-8.

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