Temperature control method and device for low load of liquid cooling system, controller, liquid cooling system and data center

Abstract

The invention provides a low-load temperature control method and device for a liquid cooling system, a controller, the liquid cooling system and a data center. The method comprises the steps that the secondary side liquid supply temperature of the heat exchanger is obtained; calculating a temperature difference value between the actual value of the secondary side liquid supply temperature and the target value of the liquid supply temperature; the current opening degree of the adjusting valve is adjusted according to the temperature difference value; and when the current opening degree of the regulating valve is reduced to a first preset opening degree threshold value and the temperature difference value still does not meet the temperature regulation condition, regulating the liquid supply temperature of the secondary side by controlling the opening degree of the temperature control valve, so that the situation that when the load rate of the liquid cooling system is relatively low, the regulating valve enters a relatively small opening degree interval, so that the accuracy is reduced, and the working efficiency is improved is avoided. And meanwhile, a part of high-temperature return liquid can be shunted through the temperature control valve, so that the temperature of the secondary side cooling liquid is equalized, the secondary side liquid supply temperature is increased, and then the opening degree of the adjusting valve returns to the interval with the better control performance.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling technology, and in particular to a method, apparatus, controller, liquid cooling system, and data center for low-load temperature control of a liquid cooling system. Background Technology

[0002] The liquid-cooled CDU (Cooling Distribution Unit) is the core component of a liquid cooling system. It is mainly responsible for the circulation, distribution, temperature and flow control of the coolant, as well as the heat exchange with external cold sources (such as chillers, cooling towers, etc.). It ensures that the coolant is delivered to heat-generating equipment (such as servers, data center cabinets, industrial equipment, etc.) with stable parameters (temperature, pressure, flow rate) to achieve efficient heat dissipation.

[0003] Liquid-cooled CDUs can control the opening of regulating valves on the primary side of the heat exchanger according to the heat dissipation requirements of different equipment, ensuring that each piece of equipment receives appropriate cooling resources. However, the optimal control performance range of the regulating valve is usually 30% to 70%. When the opening of the regulating valve is adjusted to below 30%, its regulation performance will decrease significantly. Summary of the Invention

[0004] This invention provides a method, apparatus, controller, liquid cooling system, and data center for low-load temperature control of a liquid cooling system, in order to solve the problem of poor regulation performance of coolant flow in liquid cooling systems.

[0005] In a first aspect, embodiments of the present invention provide a low-load temperature control method for a liquid cooling system, the liquid cooling system comprising a heat exchanger, a regulating valve, a temperature control valve, and a secondary-side water pump; the regulating valve is disposed on the primary-side pipeline of the heat exchanger; the temperature control valve is disposed on the connecting pipeline between the secondary-side inlet and outlet liquid pipelines of the heat exchanger, and the connecting pipeline is located between the secondary-side water pump and the heat exchanger; comprising: The method includes: Obtain the secondary side liquid supply temperature of the heat exchanger; Calculate the temperature difference between the actual value of the secondary side liquid supply temperature and the target value of the liquid supply temperature; and adjust the current opening degree of the regulating valve according to the temperature difference. If the temperature difference still does not meet the temperature regulation conditions when the current opening of the regulating valve drops to the first preset opening threshold, the secondary side liquid supply temperature is regulated by controlling the opening of the temperature control valve.

[0006] Secondly, embodiments of the present invention provide a temperature control device for a liquid cooling system under low load, comprising: The liquid cooling system includes a heat exchanger, a regulating valve, a temperature control valve, and a secondary side water pump; the regulating valve is installed on the primary side pipeline of the heat exchanger; the temperature control valve is installed on the connecting pipeline between the secondary side inlet and outlet pipelines of the heat exchanger, and the connecting pipeline is located between the secondary side water pump and the heat exchanger; The device includes: The liquid supply temperature acquisition module is used to acquire the secondary side liquid supply temperature of the heat exchanger; The regulating valve opening adjustment module is used to calculate the temperature difference between the actual value of the secondary side liquid supply temperature and the target value of the liquid supply temperature; and adjust the current opening of the regulating valve according to the temperature difference. The temperature control valve opening adjustment module is used to adjust the secondary side liquid supply temperature by controlling the opening of the temperature control valve if the temperature difference still does not meet the temperature adjustment conditions when the current opening of the control valve drops to a first preset opening threshold.

[0007] Thirdly, embodiments of the present invention provide a controller, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method as described in any possible implementation of the first aspect above.

[0008] Fourthly, embodiments of the present invention provide a liquid cooling system, including the controller described in the third aspect above.

[0009] Fifthly, embodiments of the present invention provide a data center including the liquid cooling system described in the fourth aspect above.

[0010] This invention provides a method, device, controller, liquid cooling system, and data center for low-load temperature control of a liquid cooling system. The method calculates the temperature difference between the actual secondary-side supply liquid temperature and the target supply liquid temperature. It adjusts the current opening of a regulating valve based on this temperature difference. If the temperature difference still does not meet the temperature regulation conditions when the current opening of the regulating valve drops to a first preset opening threshold, the method stops controlling the regulating valve opening and instead adjusts the secondary-side supply liquid temperature by controlling the opening of a temperature control valve. This avoids the problem of reduced accuracy caused by the regulating valve entering a smaller opening range when the liquid cooling system's load rate is low. Simultaneously, the temperature control valve diverts a portion of the high-temperature return liquid, allowing it to bypass the heat exchanger and directly enter the mixed flow, thus homogenizing the secondary-side coolant temperature and increasing the secondary-side supply liquid temperature. This, in turn, allows the regulating valve opening to return to a range with better control performance. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the liquid cooling system provided in an embodiment of the present invention; Figure 2 This is a flowchart illustrating the implementation of the low-load temperature control method for a liquid cooling system provided in this embodiment of the invention. Figure 3 This is a schematic diagram of the structure of the low-load temperature control device for the liquid cooling system provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the controller provided in an embodiment of the present invention. Detailed Implementation

[0013] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0014] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the liquid cooling system provided in an embodiment of the present invention. Figure 1 As shown, the liquid cooling system includes a heat exchanger 10, a regulating valve K1, a temperature control valve K2, and a secondary side water pump B1; the regulating valve K1 is installed on the primary side pipeline of the heat exchanger 10; the temperature control valve K2 is installed on the connecting pipeline between the secondary side inlet and outlet liquid pipelines of the heat exchanger 10, and the connecting pipeline is located between the secondary side water pump B1 and the heat exchanger 10.

[0016] In this embodiment, as Figure 1 As shown, the liquid cooling system also includes a cold source and load equipment. The cold source is the equipment that provides cooling capacity, including a chiller or cooling tower, and includes a cold source outlet and a cold source return outlet.

[0017] Specifically, the cold source outputs low-temperature coolant through its outlet, which is connected to the primary-side inlet port of the heat exchanger 10 via a primary-side inlet pipe. The primary-side outlet port of the heat exchanger 10 is connected to the inlet port of the cold source via a primary-side outlet pipe. A regulating valve K1 is installed on the primary-side outlet pipe to adjust the primary-side coolant flow rate, thus affecting the heat exchange efficiency. One end of the secondary-side supply pipe is connected to the secondary-side outlet port of the heat exchanger 10, and the other end is connected to the inlet port of the load device. One end of the secondary-side return pipe is connected to the outlet port of the load device, and the other end is connected to the secondary-side return port of the heat exchanger 10. A secondary-side water pump B1 is installed on the secondary-side return pipe, and a bypass valve K3 is connected in parallel between the input and output ends of the secondary-side water pump B1. The secondary-side water pump pressurizes the secondary-side coolant after the heat exchanger 10 has cooled and pumps it into the inlet port of the load device to maintain the circulation power on the load side. A primary side water pump can also be installed on the side of the primary side liquid outlet pipe near the cold source liquid outlet to pressurize the low-temperature coolant output from the cold source and pump it into the primary side liquid inlet port of heat exchanger 10 to maintain the circulation power of the cold source side.

[0018] In this embodiment, a branch pipeline connects the heat exchanger 10 and the secondary side water pump B1, and a temperature control valve K2 is installed on this branch pipeline. By adjusting its opening, the flow rate of the secondary side return liquid that does not pass through the heat exchanger 10 can be controlled, thereby adjusting the secondary side supply liquid temperature. The heat exchanger 10 can include a plate heat exchanger and a sleeve heat exchanger. The primary side typically receives a cold source fluid, while the secondary side receives a high-temperature coolant that has absorbed heat from the load. Through the plate structure inside the plate heat exchanger, the primary side cold fluid and the secondary side hot fluid exchange heat without direct contact, thereby reducing the temperature of the secondary side coolant and providing continuous cooling for the load. The sleeve heat exchanger consists of two sleeves, one inner and one outer. One type of liquid flows through the inner sleeve, while the other flows through the gap between the sleeves, exchanging heat through the tube walls. The following explanation uses a plate heat exchanger as an example to illustrate the subsequent embodiments.

[0019] The liquid cooling system also includes a controller, which controls the opening of regulating valve K1 and temperature control valve K2 to achieve different heat exchange efficiencies.

[0020] See Figure 2 The diagram illustrates the implementation flowchart of the low-load temperature control method for a liquid cooling system provided in this embodiment of the invention, which is described in detail below: S101: Obtain the secondary side liquid supply temperature of the heat exchanger.

[0021] In this embodiment, the secondary-side supply temperature is the temperature of the coolant output from the secondary side of the liquid cooling system to the load device, and it is the target control parameter of the liquid cooling system. In this embodiment, a temperature sensor can be installed in the secondary-side supply pipeline of the heat exchanger to collect the secondary-side supply temperature of the heat exchanger.

[0022] S102: Calculate the temperature difference between the actual value of the secondary side liquid supply temperature and the target value of the liquid supply temperature; and adjust the current opening degree of the regulating valve K1 according to the temperature difference.

[0023] In this embodiment, the controller can subtract the actual value of the secondary side supply temperature from the target value of the supply temperature to obtain the temperature difference. Then, the controller adjusts the current opening of the regulating valve K1 according to the temperature difference. The temperature difference is negatively correlated with the current opening of the regulating valve K1. That is, the larger the temperature difference, the smaller the opening of the regulating valve K1, and the smaller the temperature difference, the larger the opening of the regulating valve K1.

[0024] S103: If the temperature difference still does not meet the temperature regulation conditions when the current opening degree of the regulating valve K1 drops to the first preset opening degree threshold, the secondary side liquid supply temperature is regulated by controlling the opening degree of the temperature control valve K2.

[0025] In this embodiment, the regulating valve K1 in the liquid cooling system is typically an electrically operated regulating valve. This type of valve, driven by a motor, allows for continuous and linear adjustment of its opening degree based on the electrical signal output by the controller. While this valve maintains high control accuracy and performance at most opening values, its control accuracy significantly decreases when the valve opening is too low or too high. To prevent the regulating valve K1 from entering a poor performance range, this embodiment maintains the regulating valve K1 at a first preset opening threshold when its current opening drops to that threshold. This avoids excessive coolant temperature fluctuations due to poor control performance in the low opening range. The secondary-side supply temperature is then regulated via the temperature control valve K2. The first preset opening threshold can be 10% to 30%.

[0026] As can be seen from the above embodiments, this embodiment calculates the temperature difference between the actual value of the secondary side liquid supply temperature and the target value of the liquid supply temperature; it can adjust the current opening of the regulating valve K1 according to the temperature difference; and when the temperature difference still does not meet the temperature regulation condition when the current opening of the regulating valve K1 drops to the first preset opening threshold, it no longer controls the opening of the regulating valve K1, but adjusts the secondary side liquid supply temperature by controlling the opening of the temperature control valve K2, avoiding the problem of reduced accuracy caused by the regulating valve K1 entering a small opening range when the load rate of the liquid cooling system is low. At the same time, it can divert a part of the high-temperature return liquid through the temperature control valve K2, so that it enters the mixed flow directly without heat dissipation through the heat exchanger to improve the secondary side liquid supply temperature, thereby allowing the opening of the regulating valve K1 to return to the range with better control performance, ensuring the control stability of the liquid supply temperature.

[0027] In one possible implementation, the regulating valve K1 is located on the primary side outlet pipe of the heat exchanger; before S103, the method provided in this embodiment further includes: S201: Obtain the load data of the liquid cooling system; S202: Determine the size of the first preset opening threshold based on the load data, wherein the load data is positively correlated with the first preset opening threshold.

[0028] In this embodiment, the regulating valve K1 is installed on the primary side outlet pipe, which can ensure that the cooling medium in the outlet pipe has undergone heat exchange. The regulating valve adjusts the flow rate after passing through the plate heat exchanger. When the external water pump is relatively close, it can also protect the plate heat exchanger from negative pressure.

[0029] In this embodiment, the load data may include load rate, load power, and load voltage. The load data is positively correlated with a first preset opening threshold; that is, when the load data is high, the first preset opening threshold is large, and when the load data is low, the first preset opening threshold is small.

[0030] Specifically, when the regulating valve K1 is in a small opening range, its control performance is poor, resulting in large fluctuations in coolant temperature. At higher load rates, such as above 25%, the cooling demand is greater, and the coolant temperature output from the cold source is lower. Even small changes in the regulating valve K1 can cause significant coolant temperature fluctuations. Therefore, higher control accuracy is required for cooling temperature at this time, and the higher the load data, the larger the required first preset opening threshold. Conversely, when the load rate is low, the required cooling capacity is also small, and the coolant temperature is close to room temperature. Therefore, even if the regulating valve K1 is not controlled accurately, the resulting coolant temperature fluctuations will not be significant. Thus, this embodiment sets the load data and the opening of the regulating valve K1 to be positively correlated. This not only ensures the cooling requirements of the load equipment but also maximizes the control accuracy of the regulating valve K1, ensuring the stability of coolant temperature control.

[0031] In one possible implementation, the load data includes the load rate; the specific implementation process of S202 includes: If the load rate is greater than the first load threshold, then the first opening value is used as the first preset opening threshold. If the load rate is not greater than the first load threshold but greater than the second load threshold, then the second opening value is used as the first preset opening threshold. If the load rate is not greater than the second load threshold, then the first preset opening threshold is set to zero; The first load threshold is greater than the second load threshold; the first opening value is greater than the second opening value, and the second opening value is greater than zero.

[0032] In this embodiment, the first load threshold can be 25%~30%, preferably 25%. When the load rate is greater than 25%, the first opening value can be 20%~35%. The second load threshold can be 15%~10%, preferably 15%. When the load rate is less than 25% but greater than 15%, the second opening value can be set to 10%~15%. Preferably, the first preset opening threshold can be 10%. When the load rate is less than the second load threshold (15%), the first preset opening threshold can be set to zero. That is, under extremely low load rate conditions, the cooling demand is also extremely low. Therefore, the restriction on the accuracy of the regulating valve K1 can be relaxed, and the focus is on ensuring that the coolant temperature meets the liquid cooling demand. At the same time, since the cooling output of the cold source is small, the opening fluctuation of the regulating valve K1 will not have a significant impact on the coolant temperature.

[0033] The above method can balance the regulating capacity of regulating valve K1 and the intervention timing of temperature control valve K2, reducing regulation oscillation. At extremely low load rates, the first preset opening threshold is set to zero, allowing regulating valve K1 to be fully closed. At this time, temperature control valve K2 dominates the temperature regulation, preventing the cold energy output from the cold source from being delivered to the load equipment. This ensures that the liquid supply temperature is not too low and maintains a stable liquid supply temperature, improving the robustness of the control.

[0034] In this embodiment, the specific implementation process of using the second opening value as the first preset opening threshold if the load rate is not greater than the first load threshold but greater than the second load threshold includes: If the load rate is not greater than the first load threshold but greater than the second load threshold, and after the temperature control valve K2 is opened for a first preset time, the opening degree of the regulating valve K1 determined based on the temperature difference is still lower than the first opening degree value, then the second opening degree value is used as the first preset opening threshold.

[0035] Specifically, when the load rate is in the low to medium load rate range (not greater than the first load threshold and greater than the second load threshold), if the opening degree of the regulating valve K1, determined based on the latest temperature difference, is still below the first opening value after the temperature control valve K2 has been opened for a first preset time, it indicates that the method of diverting the secondary side return liquid using the temperature control valve K2 cannot effectively improve the supply liquid temperature. If the regulating valve K1 remains at the first opening value, the temperature difference will continue to decrease, which may cause the actual supply liquid temperature to drop below the target supply liquid temperature value. In order to ensure the temperature control effect of the liquid cooling system, in this embodiment, when it is detected that the opening degree of the regulating valve K1, determined based on the temperature difference, is still lower than the first opening value after the temperature control valve K2 has been opened for a first preset time, the first preset opening threshold is reduced to the second opening value to meet the load temperature requirements.

[0036] For example, the first preset duration can be 5 to 10 minutes.

[0037] Specifically, to avoid temperature fluctuations caused by frequent switching of the first preset opening threshold, the specific implementation process of S202 above may include: If the load rate is greater than the first load threshold, then the first opening value is used as the first preset opening threshold. If the load rate is detected to decrease to no more than the first load threshold, then if the load rate is detected to be no more than the first load threshold and greater than the second load threshold for a second preset duration starting from the moment the load rate is detected to be no more than the first load threshold and greater than the second load threshold, then the second opening value is used as the first preset opening threshold. If the load rate is detected to decrease to no more than the second load threshold, and the load rate is detected to be no more than the second load threshold for a third preset duration starting from the moment the load rate is detected to be no more than the second load threshold, then the first preset opening threshold is set to zero.

[0038] The second preset duration can be 10s to 30s, and the third preset duration can be 10s to 30s.

[0039] In one possible implementation, after S103, the method provided in this embodiment further includes: If the current opening value of the temperature control valve K2 is detected to be less than the second preset opening threshold for a duration that reaches a preset time threshold, then the temperature control valve K2 is closed, and the process returns to the step of obtaining the secondary side liquid supply temperature of the heat exchanger to continue execution.

[0040] In this embodiment, if the current opening degree of the temperature control valve K2 is detected to be less than the second preset opening degree threshold, and the duration of this state reaches the preset time threshold, it indicates that the temperature control valve K2 has also entered the low opening degree range, and its regulatory effect on the secondary side liquid supply temperature is weak. Therefore, the temperature control valve K2 can be closed, and the temperature control can be re-controlled by the regulating valve K1. For example, if the secondary side liquid supply temperature has stabilized, there is no need for the temperature control valve K2 to perform diversion temperature control.

[0041] For example, the preset time threshold can be 20 minutes to 40 minutes, preferably 30 minutes. The second preset opening threshold can be 20% to 40%, preferably 30%.

[0042] As can be seen from the above embodiments, this embodiment can effectively identify the inefficient adjustment state of the temperature control valve K2. In this state, the temperature control valve K2 has a limited impact on the liquid supply temperature, and the temperature control valve K2 has also entered a low opening range with poor accuracy. Continuous operation will increase energy consumption and may introduce adjustment noise. At this time, closing the temperature control valve K2 can reduce unnecessary energy consumption and reduce valve wear. Secondly, after closing, the logic returns to re-detecting the liquid supply temperature, so that the system can re-evaluate the temperature state. If the temperature has stabilized, the control valve K1 will resume its dominant adjustment, making full use of its superior performance in medium and high opening, and avoiding the ineffective intervention of the temperature control valve K2. In addition, the introduction of the preset time threshold can filter instantaneous fluctuations, prevent frequent switching caused by short-term opening changes, improve the stability of system operation, and enhance the flexibility and reliability of system adjustment.

[0043] In one possible implementation, the specific implementation process of S103 includes: If the load rate is greater than the second load threshold, the opening degree of the temperature control valve K2 is adjusted according to the temperature difference / load rate; the load rate is negatively correlated with the opening degree of the temperature control valve K2.

[0044] In this embodiment, the temperature control valve K2 is used to directly divert the high-temperature secondary side return liquid back to the secondary side supply liquid pipeline. Therefore, with the opening of the regulating valve K1 unchanged, the larger the opening of the temperature control valve K2, the higher the secondary side supply liquid temperature, and the smaller the opening of the temperature control valve K2, the lower the secondary side supply liquid temperature.

[0045] When the load rate exceeds the second load threshold, the opening of regulating valve K1 is fixed at the first preset opening threshold. The secondary side supply temperature is adjusted by temperature control valve K2. The opening of temperature control valve K2 can be determined based on the temperature difference or the load rate. Specifically, when adjusting the opening of temperature control valve K2 using the temperature difference, the temperature difference is positively correlated with the opening of temperature control valve K2. That is, the larger the difference between the target supply temperature and the actual secondary side supply temperature, the greater the need for temperature control valve K2 to increase the opening to raise the actual secondary side supply temperature and approach the target supply temperature. Conversely, the smaller the difference between the target supply temperature and the actual secondary side supply temperature, the larger the actual supply temperature, requiring a reduction in the return flow of the high-temperature secondary side coolant diverted by temperature control valve K2 to further reduce the actual supply temperature to the target supply temperature.

[0046] When the opening of the temperature control valve K2 is adjusted by the load rate, the higher the load rate, the greater the required cooling capacity. Therefore, the opening of the temperature control valve K2 needs to be reduced to lower the secondary side liquid supply temperature. Conversely, the lower the load rate, the less cooling capacity is required. Therefore, the opening of the temperature control valve K2 needs to be increased to raise the secondary side liquid supply temperature.

[0047] In this embodiment, the controller can also take into account the load rate and temperature difference, perform a weighted summation of the two, and determine the opening value of the temperature control valve K2 based on the weighted summation value.

[0048] In one possible implementation, the specific implementation process of S103 further includes: If the load rate is not greater than the second load threshold and is greater than the third load threshold, then the opening of the temperature control valve K2 is adjusted to zero. If the load rate is not greater than the third load threshold, then the opening of the temperature control valve K2 is adjusted to the full scale value; The third load threshold is less than the second load threshold.

[0049] In this embodiment, when the load rate is less than or equal to the second load threshold and greater than the third load threshold, the first preset opening threshold of the regulating valve K1 is set to zero, and the opening of the temperature control valve K2 is adjusted to zero. This is because simply using the temperature control valve K2 to control the temperature cannot guarantee that the actual liquid supply temperature approaches the target value, and simultaneously controlling both the regulating valve K1 and the temperature control valve K2 is ineffective. Furthermore, since the load rate is low at this time, the temperature control valve K2 can be directly closed, and the first preset opening threshold of the regulating valve K1 is reduced to zero, meaning the secondary side liquid supply temperature is directly controlled by the regulating valve K1. When the load rate is not greater than the third load threshold, it indicates that the load rate is extremely low. Therefore, the cooling demand is very small, and the actual value of the secondary side liquid supply temperature may be less than the target value. Therefore, the temperature control valve K2 needs to be fully opened, and the first preset opening threshold of the regulating valve K1 is set to zero. This means that the secondary side liquid supply temperature demand can be met by continuously reducing the opening of the regulating valve K1.

[0050] For example, the full scale value is 100%.

[0051] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0052] The following are device embodiments of the present invention. For details not described in detail, please refer to the corresponding method embodiments described above.

[0053] Figure 3 A schematic diagram of a low-load temperature control device for a liquid cooling system provided in an embodiment of the present invention is shown. For ease of explanation, only the parts relevant to the embodiment of the present invention are shown, and are described in detail below: like Figure 3 As shown, the temperature control device 100 for low-load liquid cooling system includes: Liquid supply temperature acquisition module 110 is used to acquire the secondary side liquid supply temperature of the heat exchanger; The regulating valve K1 opening adjustment module 120 is used to calculate the temperature difference between the actual value of the secondary side liquid supply temperature and the target value of the liquid supply temperature; and adjust the current opening of the regulating valve K1 according to the temperature difference. The temperature control valve K2 opening adjustment module 130 is used to adjust the secondary side liquid supply temperature by controlling the opening of the temperature control valve K2 if the temperature difference still does not meet the temperature adjustment conditions when the current opening of the adjustment valve K1 drops to a first preset opening threshold.

[0054] In one possible implementation, the regulating valve K1 is disposed on the primary side liquid outlet pipe of the heat exchanger; the low-load temperature control device 100 of the liquid cooling system further includes a first preset opening threshold determination module, used for: A load data acquisition unit is used to acquire the load data of the liquid cooling system; The first preset opening threshold adjustment unit is used to determine the size of the first preset opening threshold based on the load data, wherein the load data is positively correlated with the first preset opening threshold.

[0055] In one possible implementation, the load data includes a load rate; the first preset opening threshold adjustment unit includes: If the load rate is greater than the first load threshold, then the first opening value is used as the first preset opening threshold. If the load rate is not greater than the first load threshold but greater than the second load threshold, then the second opening value is used as the first preset opening threshold. If the load rate is not greater than the second load threshold, then the first preset opening threshold is set to zero; The first load threshold is greater than the second load threshold; the first opening value is greater than the second opening value, and the second opening value is greater than zero.

[0056] In one possible implementation, the device provided in this embodiment further includes a temperature control valve K2 shut-off module, used for: If the current opening value of the temperature control valve K2 is detected to be less than the second preset opening threshold for a duration that reaches a preset time threshold, then the temperature control valve K2 is closed, and the process returns to the step of obtaining the secondary side liquid supply temperature of the heat exchanger to continue execution.

[0057] In one possible implementation, the temperature control valve K2 opening adjustment module 130 includes: If the load rate is greater than the second load threshold, the opening degree of the temperature control valve K2 is adjusted according to the temperature difference / load rate; the load rate is negatively correlated with the opening degree of the temperature control valve K2.

[0058] In one possible implementation, the temperature control valve K2 opening adjustment module 130 further includes: If the load rate is not greater than the second load threshold and is greater than the third load threshold, then the opening of the temperature control valve K2 is adjusted to zero. If the load rate is not greater than the third load threshold, then the opening of the temperature control valve is adjusted to the full scale value; The third load threshold is less than the second load threshold.

[0059] Figure 4 This is a schematic diagram of the controller provided in an embodiment of the present invention. Figure 4 As shown, the controller 4 in this embodiment includes a processor 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40. When the processor 40 executes the computer program 42, it implements the steps in the various embodiments of the low-load temperature control method for liquid cooling systems described above, for example... Figure 2 Steps S101 to S103 are shown. Alternatively, when the processor 40 executes the computer program 42, it implements the functions of each module / unit in the above-described device embodiments.

[0060] For example, the computer program 42 may be divided into one or more modules / units, which are stored in the memory 41 and executed by the processor 40 to complete the present invention. The one or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 42 in the controller 4.

[0061] The controller 4 can be a computing device such as a desktop computer, laptop, handheld computer, or cloud server. The controller 4 may include, but is not limited to, a processor 40 and a memory 41. Those skilled in the art will understand that... Figure 4 This is merely an example of controller 4 and does not constitute a limitation on controller 4. It may include more or fewer components than shown, or combine certain components, or different components. For example, the controller may also include input / output devices, network access devices, buses, etc.

[0062] The processor 40 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0063] The memory 41 can be an internal storage unit of the controller 4, such as a hard disk or memory of the controller 4. The memory 41 can also be an external storage device of the controller 4, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the controller 4. Furthermore, the memory 41 can include both internal storage units and external storage devices of the controller 4. The memory 41 is used to store the computer program and other programs and data required by the controller. The memory 41 can also be used to temporarily store data that has been output or will be output.

[0064] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0065] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0066] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0067] In the embodiments provided by this invention, it should be understood that the disclosed devices / controllers and methods can be implemented in other ways. For example, the device / controller embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0068] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0069] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0070] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various embodiments of the low-load temperature control method for liquid cooling systems described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0071] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for temperature control of a liquid cooling system under low load, characterized in that, The liquid cooling system includes a heat exchanger, a regulating valve, a temperature control valve, and a secondary water pump; the regulating valve is located on the primary side pipeline of the heat exchanger. The temperature control valve is installed on the connecting pipe between the secondary side inlet and outlet liquid lines of the heat exchanger, and the connecting pipe is located between the secondary side water pump and the heat exchanger. The method includes: Obtain the secondary side liquid supply temperature of the heat exchanger; Calculate the temperature difference between the actual value of the secondary side liquid supply temperature and the target value of the liquid supply temperature; and adjust the current opening degree of the regulating valve according to the temperature difference. If the temperature difference still does not meet the temperature regulation conditions when the current opening of the regulating valve drops to the first preset opening threshold, the secondary side liquid supply temperature is regulated by controlling the opening of the temperature control valve.

2. The low-load temperature control method for a liquid cooling system according to claim 1, characterized in that, The regulating valve is installed on the primary side liquid outlet pipe of the heat exchanger; Before adjusting the secondary-side liquid supply temperature by controlling the opening of the temperature control valve to adjust the temperature regulation condition if the temperature difference still does not meet the temperature regulation condition when the current opening of the regulating valve drops to a first preset opening threshold, the method further includes: Obtain the load data of the liquid cooling system; The first preset opening threshold is determined based on the load data, and the load data is positively correlated with the first preset opening threshold.

3. The low-load temperature control method for a liquid cooling system according to claim 2, characterized in that, The load data includes the load rate; determining the magnitude of the first preset opening threshold based on the load data includes: If the load rate is greater than the first load threshold, then the first opening value is used as the first preset opening threshold. If the load rate is not greater than the first load threshold but greater than the second load threshold, then the second opening value is used as the first preset opening threshold. If the load rate is not greater than the second load threshold, then the first preset opening threshold is set to zero; The first load threshold is greater than the second load threshold; the first opening value is greater than the second opening value, and the second opening value is greater than zero.

4. The low-load temperature control method for a liquid cooling system according to claim 1, characterized in that, After adjusting the secondary side supply temperature by controlling the opening of the temperature control valve, the method further includes: If the current opening value of the temperature control valve is detected to be less than the second preset opening threshold for a duration that reaches a preset time threshold, then the temperature control valve is closed, and the process returns to the step of obtaining the secondary side liquid supply temperature of the heat exchanger to continue execution.

5. The low-load temperature control method for a liquid cooling system according to claim 3, characterized in that, The method of adjusting the secondary side liquid supply temperature by controlling the opening degree of the temperature control valve includes: If the load rate is greater than the second load threshold, the opening of the temperature control valve is adjusted according to the temperature difference / load rate; the load rate is negatively correlated with the opening of the temperature control valve.

6. The low-load temperature control method for a liquid cooling system according to claim 3, characterized in that, The method of adjusting the secondary side liquid supply temperature by controlling the opening degree of the temperature control valve includes: If the load rate is not greater than the second load threshold and is greater than the third load threshold, then the opening of the temperature control valve is adjusted to zero. If the load rate is not greater than the third load threshold, then the opening of the temperature control valve is adjusted to the full scale value; The third load threshold is less than the second load threshold.

7. A temperature control device for a liquid cooling system under low load, characterized in that, The liquid cooling system includes a heat exchanger, a regulating valve, a temperature control valve, and a secondary side water pump; the regulating valve is installed on the primary side pipeline of the heat exchanger; the temperature control valve is installed on the connecting pipeline between the secondary side inlet and outlet pipelines of the heat exchanger, and the connecting pipeline is located between the secondary side water pump and the heat exchanger; The device includes: The liquid supply temperature acquisition module is used to acquire the secondary side liquid supply temperature of the heat exchanger; The regulating valve opening adjustment module is used to calculate the temperature difference between the actual value of the secondary side liquid supply temperature and the target value of the liquid supply temperature; and adjust the current opening of the regulating valve according to the temperature difference. The temperature control valve opening adjustment module is used to adjust the secondary side liquid supply temperature by controlling the opening of the temperature control valve if the temperature difference still does not meet the temperature adjustment conditions when the current opening of the control valve drops to a first preset opening threshold.

8. A controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the low-load temperature control method for the liquid cooling system as described in any one of claims 1 to 6.

9. A liquid cooling system, characterized in that, include: The controller as described in claim 8.

10. A data center, characterized in that, include: The liquid cooling system as described in claim 9.

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