Immersed liquid cooling data center constant temperature control method and system

Abstract

The invention provides an immersed liquid cooling data center constant temperature control method and system, relates to the technical field of data center heat dissipation, and solves the problems that the liquid supply temperature of a liquid cooling working medium is affected by the temperature of cooling water, and the temperature difference of the liquid cooling working medium cannot be flexibly adjusted due to the temperature of the cooling water. Comprising the steps that a computing device computes a feedback signal value according to data transmitted by a sensor and sets a target temperature difference according to the data transmitted by the sensor or a user instruction; and the computing device issues the target temperature difference and the feedback signal value to the proportional valve, and the proportional valve adjusts the opening value of the water pipeline based on the target temperature difference and the feedback signal value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of data center heat dissipation technology, in particular to a constant temperature control method and system for an immersion liquid cooling data center. BACKGROUND

[0002] With the popularization of 5G, artificial intelligence, big data and other high-performance computing, the power density of servers continues to rise. The traditional air cooling system has been difficult to meet the heat dissipation needs of high-heat devices due to its low air heat conduction efficiency, high energy consumption (more than 40% of refrigeration proportion) and high noise. Immersion liquid cooling improves the heat transfer efficiency by several tens of times through the direct contact of the cooling liquid and the heat generating components, eliminates the fan energy consumption, and reduces the PUE (power usage effectiveness) to below 1.05, thereby greatly reducing the total energy consumption of the data center. In addition, the immersion liquid cooling technology avoids local overheating through the liquid temperature equalization feature, significantly improves the reliability of the equipment, and solves the problem of air cooling failure in special environments such as high altitude and severe cold, thereby providing an irreplaceable heat dissipation path for the future development of high-density and green data centers.

[0003] Tank refers to the internal part of a sealed tank or container filled with cooling liquid. In an immersion liquid cooling system, the cooling liquid is driven by an external pump set, enters the sealed Tank from the pre-cooled inlet pipeline, directly immerses the server and other heat generating hardware, absorbs the heat generated by CPU / GPU and other elements through conduction and convection, and raises the temperature of the liquid cooling medium. The liquid cooling medium with a raised temperature flows out of the Tank outlet, is cooled again by the external heat exchanger after releasing heat, and is sent back to the Tank by the pump set to form a closed loop circulation.

[0004] Based on the working principle of the above-mentioned immersion liquid cooling technology, the temperature regulation of the liquid cooling medium is crucial. The efficiency of cooling is related to the temperature difference between the supply liquid temperature of the liquid cooling medium entering the Tank and the return liquid temperature flowing out of the Tank. Whether the cooling efficiency can be flexibly adjusted depends on the flexible control of the supply liquid and return liquid temperature difference of the liquid cooling medium. However, under the current technology, the supply liquid temperature of the liquid cooling medium is affected by the cooling water temperature, and the temperature of the cooling water limits the flexibility of the temperature difference regulation of the liquid cooling medium. SUMMARY

[0005] In view of the shortcomings of the above-mentioned related technology, the present application provides a constant temperature control method and system for an immersion liquid cooling data center to solve the above-mentioned technical problems.

[0006] In a first aspect, the present application provides a constant temperature control method for an immersion liquid cooling data center, comprising:

[0007] The computing device calculates the feedback signal value according to the data transmitted by the sensor, and sets the target temperature difference according to the data transmitted by the sensor or the user instruction;

[0008] The computing device sends the target temperature difference and the feedback signal value to the proportional valve, and the proportional valve adjusts the opening value of the water passage pipeline based on the target temperature difference and the feedback signal value.

[0009] In an embodiment of the present application, the method further comprises:

[0010] The computing device sends the target temperature difference and the feedback signal value to the circulating pump, and the circulating pump adjusts the flow rate of the cold liquid working medium based on the target temperature difference and the feedback signal value.

[0011] In an embodiment of the present application, the computing device sends the target temperature difference and the feedback signal value to the proportional valve, and the proportional valve adjusts the opening value of the water passage pipeline based on the target temperature difference and the feedback signal value, comprising:

[0012] Setting a target signal value according to the target temperature difference, and obtaining a feedback signal value;

[0013] Calculating the difference between the target signal value and the feedback signal value;

[0014] Determining the size relationship between the difference between the target signal value and the feedback signal value and zero, and adjusting the opening value of the proportional valve according to the size relationship between the difference between the target signal value and the feedback signal value and zero.

[0015] In an embodiment of the present application, determining the size relationship between the difference between the target signal value and the feedback signal value and zero, and adjusting the opening value of the proportional valve according to the size relationship between the difference between the target signal value and the feedback signal value and zero, comprises:

[0016] Determining the size relationship between the difference between the target signal value and the feedback signal value and zero, and if the target signal value is greater than the feedback signal value, the proportional valve increases the opening value of the water flow pipeline in the heat exchanger through the opening signal, detects the flow value of the water in the heat exchanger, detects that the flow of the water in the heat exchanger increases, and determines that X T = X F When the proportional valve maintains the current opening value.

[0017] In an embodiment of the present application, determining the size relationship between the difference between the target signal value and the feedback signal value and zero, and adjusting the opening value of the proportional valve according to the size relationship between the difference between the target signal value and the feedback signal value and zero, comprises:

[0018] Determining the size relationship between the difference between the target signal value and the feedback signal value and zero, and if the target signal value is less than the feedback signal value, the proportional valve decreases the opening value of the water flow pipeline in the heat exchanger through the opening signal, detects the flow value of the water in the heat exchanger, detects that the flow of the water in the heat exchanger decreases, and determines that X T = X F When the proportional valve maintains the current opening value.

[0019] In an embodiment of the present application, the computing device sends the target temperature difference and the feedback signal value to the circulating pump, and the circulating pump adjusts the flow rate of the cold liquid working medium based on the target temperature difference and the feedback signal value, including:

[0020] Setting the target signal value according to the target temperature difference, and obtaining the feedback signal value;

[0021] Calculating the difference between the target signal value and the feedback signal value;

[0022] Determining the size relationship between the difference between the target signal value and the feedback signal value and zero, and adjusting the rotating speed of the circulating pump according to the size relationship between the difference between the target signal value and the feedback signal value and zero.

[0023] In an embodiment of the present application, the rotating speed of the circulating pump is adjusted according to the size relationship between the difference between the target signal value and the feedback signal value and zero, including:

[0024] Determining the size relationship between the difference between the target signal value and the feedback signal value and zero, if the target signal value is greater than the feedback signal value, increasing the output frequency of the frequency converter to increase the rotating speed of the circulating pump, detecting the flow value of the water in the heat exchanger, and when the flow of the water in the heat exchanger is detected to increase and it is determined that X T = X F , the circulating pump maintains the current rotating speed.

[0025] In an embodiment of the present application, the rotating speed of the circulating pump is adjusted according to the size relationship between the difference between the target signal value and the feedback signal value and zero, including:

[0026] Determining the size relationship between the difference between the target signal value and the feedback signal value and zero, if the target signal value is less than the feedback signal value, decreasing the output frequency of the frequency converter to decrease the rotating speed of the circulating pump, detecting the flow value of the water in the heat exchanger, and when the flow of the water in the heat exchanger is detected to decrease and it is determined that X T = X F , the current rotating speed of the circulating pump is maintained.

[0027] In a second aspect, the present application provides an immersed liquid cooling data center constant temperature control system, including:

[0028] The computing device, the proportional valve and the circulating pump are included, wherein the computing device is used for calculating the feedback signal value according to the data transmitted by the sensor, and setting the target temperature difference according to the data transmitted by the sensor or the user instruction, and sending the target temperature difference and the feedback signal value to the proportional valve and the circulating pump;

[0029] The proportional valve is used for adjusting the opening value of the water pipeline based on the target temperature difference and the feedback signal value;

[0030] The circulating pump is used for adjusting the flow rate of the cold liquid working medium based on the target temperature difference and the feedback signal value.

[0031] In an embodiment of the present application, the proportional valve is specifically used to perform the following processes:

[0032] Setting a target signal value according to a target temperature difference, and obtaining a feedback signal value;

[0033] Calculating a difference between the target signal value and the feedback signal value;

[0034] Determining a size relationship between the difference and zero, and adjusting an opening value of the proportional valve according to the size relationship;

[0035] Determining a size relationship between the difference and zero, and if the target signal value is greater than the feedback signal value, increasing the opening value of the water flow pipeline in the heat exchanger through the opening signal, detecting the water flow value in the heat exchanger, detecting that the water flow in the heat exchanger is increased, and determining that X T = X F , the proportional valve maintains the current opening value;

[0036] Determining a size relationship between the difference and zero, and if the target signal value is less than the feedback signal value, decreasing the opening value of the water flow pipeline in the heat exchanger through the opening signal, detecting the water flow value in the heat exchanger, detecting that the water flow in the heat exchanger is decreased, and determining that X T = X F , the proportional valve maintains the current opening value.

[0037] In an embodiment of the present application, the circulating pump is specifically used to perform the following processes:

[0038] Setting a target signal value according to a target temperature difference, and obtaining a feedback signal value;

[0039] Calculating a difference between the target signal value and the feedback signal value;

[0040] Determining a size relationship between the difference and zero, and adjusting a rotating speed of the circulating pump according to the size relationship;

[0041] Determining a size relationship between the difference and zero, and if the target signal value is greater than the feedback signal value, increasing the output frequency of the frequency converter to increase the rotating speed of the circulating pump, detecting the water flow value in the heat exchanger, detecting that the water flow in the heat exchanger is increased, and determining that X T = X F , the circulating pump maintains the current rotating speed;

[0042] Judge the size relation of the difference between the target signal value and the feedback signal value and zero, if the target signal value is less than the feedback signal value, the frequency of the frequency converter is reduced to reduce the rotating speed of the circulating pump, the flow value of the water in the heat exchanger is detected, when the flow of the water in the heat exchanger is detected to be reduced, and when X T =X F The current rotating speed of the circulating pump is maintained.

[0043] As described above, the test file generation method and system based on automatic test of hard disk performance provided by the application have the following beneficial effects:

[0044] Since the traditional method does not have a proportional valve, the water flow rate on the heat exchanger side is constant, that is, the heat exchange efficiency of the cold liquid working medium in the heat exchanger is only affected by the temperature of the water, the right circulating pump can only adjust the temperature difference between the supply liquid and the return liquid, the supply liquid temperature is close to the left water temperature, so the temperature of the liquid cooling working medium on the right side will change with the change of the left water temperature, resulting in that the temperature difference of the cold liquid working medium in the Tank is difficult to control and maintain within a certain range. Based on the above finding, the inventors propose the immersion liquid cooling data center constant temperature control method, a proportional valve is arranged, the water flow rate is controlled by the proportional method, the heat exchange efficiency of the heat exchanger on the liquid cooling working medium is controlled by the water flow rate, a computing device is connected to the proportional valve, the computing device issues the target temperature difference based on the current heat exchange demand to the proportional valve, the proportional valve is adjusted according to the system supply liquid temperature difference, PID control is adopted, the water flow rate is adjusted to adjust the heat exchange efficiency of the water on the cold liquid working medium, and the system supply liquid temperature is maintained at the set target temperature to maintain the temperature difference between the supply liquid and the return liquid in the Tank at the set target temperature. BRIEF DESCRIPTION OF DRAWINGS

[0045] The drawings incorporated into the specification and forming a part thereof show embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application. It is apparent that the drawings described below are only some embodiments of the present application, and other drawings can be obtained from these drawings without creative labor for those skilled in the art. In the drawings:

[0046] Figure 1 is a structural schematic diagram of the immersion liquid cooling data center constant temperature control system;

[0047] Figure 2 is an application scene diagram of the immersion liquid cooling data center constant temperature control system proposed by the present application;

[0048] Figure 3 is a step flowchart of the immersion liquid cooling data center constant temperature control method proposed by the embodiment of the present application;

[0049] Figure 4 is a flowchart of the proportional valve adjusting the absolute temperature of the cold liquid working medium;

[0050] Figure 5 is a flow chart of the circulating pump adjusting the relative temperature of the liquid cooling working medium of the application. DETAILED DESCRIPTION

[0051] The advantages and effects of the present application can be easily understood by those skilled in the art from the description disclosed in the specification. The present application can also be implemented or applied by different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, but not for limiting the protection scope of the present application.

[0052] It should be noted that the diagrams provided in the following embodiments only schematically illustrate the basic concept of the present application, and only the components related to the present application are shown in the diagrams, but not drawn according to the number, shape and size of the components in actual implementation. The shapes, number and proportions of the components in actual implementation can be arbitrarily changed, and the layout pattern of the components can be more complex.

[0053] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present application, however, it is obvious for those skilled in the art that the embodiments of the present application can be implemented without these specific details, and in other embodiments, the known structures and devices are shown in the form of block diagrams instead of details, to avoid making the embodiments of the present application difficult to understand.

[0054] The present application is designed to use two-stage PID speed regulation to solve the problem that the difference between the supply liquid temperature and the return liquid temperature of the liquid cooling working medium cannot be controlled due to the influence of water temperature on the liquid cooling working medium. The first-stage PID adjusts the flow rate of the primary side water to control the absolute temperature of the liquid cooling working medium, and the second-stage PID adjusts the flow rate of the cooling working medium to control the relative temperature of the liquid cooling working medium entering and exiting the liquid. The two-stage speed regulation stabilizes the temperature of the liquid cooling working medium within a very small fluctuation range.

[0055] The present application provides a submerged liquid cooling data center constant temperature control method, which is applied to a submerged liquid cooling data center constant temperature control system, Figure 1 is a structural schematic diagram of the submerged liquid cooling data center constant temperature control system, Figure 2 is an application scenario diagram of the submerged liquid cooling data center constant temperature control system provided by the present application.

[0056] Reference Figure 1 and Figure 2The immersion liquid cooling data center constant temperature control system comprises a computing device, a proportional valve and a circulating pump. The computing device can be a computer terminal, a server, etc., for receiving user instructions, monitoring the temperature of the liquid cooling medium, setting the working mode of the proportional valve and the circulating pump, and calculating the temperature difference that the liquid cooling medium should maintain under specific conditions to maintain a high cooling effect.

[0057] The proportional valve is arranged on the water pump side and is used to respond to instructions, perform PID first-stage regulation calculation with the target temperature difference as the target, adjust the flow rate of water, and control the absolute temperature of the liquid cooling medium. The water pump extracts a corresponding amount of water from the water tower based on the opening of the proportional valve.

[0058] The circulating pump is arranged on the server cabinet side and is used to respond to instructions, perform PID second-stage regulation calculation with the target temperature difference as the target, adjust the flow rate of the liquid cooling medium, and control the temperature of the liquid cooling medium within a set fluctuation range through the two-stage speed regulation of the proportional valve and the circulating pump.

[0059] Figure 3 The step flow chart of the immersion liquid cooling data center constant temperature control method proposed by the embodiment of the present application is shown in FIG. 1. Figure 3 As shown in FIG. 1, the steps of the immersion liquid cooling data center constant temperature control method include:

[0060] S11: The computing device calculates the feedback signal value according to the data transmitted by the sensor, and sets the target temperature difference according to the data transmitted by the sensor or the user instructions.

[0061] The computing device can also be connected to an environment temperature sensor, a server internal sensor and a cooling liquid contact sensor. The environment temperature sensor is used to collect the environment temperature, the server internal sensor can be a CPU / GPU built-in diode to directly read the chip junction temperature, and the cooling liquid contact sensor adopts an immersion PT100 / Pt1000: installed in the cooling liquid flow channel in the Tank to measure the temperature difference between the inlet and outlet of the liquid.

[0062] The computing device evaluates the temperature difference that the liquid cooling medium supply and return should maintain at the current environment temperature to ensure the cooling effect on the chip according to the environment temperature, the historical working temperature difference of the liquid cooling medium and the server chip temperature, and sets the target temperature difference.

[0063] In some cases, the target temperature difference liquid can be set according to the user input instructions in combination with the user input instructions.

[0064] The target temperature difference represents the temperature difference value that the liquid cooling medium flowing into the Tank and flowing out of the Tank should maintain.

[0065] The feedback signal value refers to the actual temperature difference of the current liquid cooling medium obtained based on the temperature of the liquid cooling medium at the Tank inlet collected by the sensor and the temperature of the liquid cooling medium at the Tank outlet collected by the sensor.

[0066] The present value Tank supply and return actual temperature difference.

[0067] S12: The computing device issues the target temperature difference and the feedback signal value to the proportional valve, and the proportional valve adjusts the opening value of the water passage based on the target temperature difference and the feedback signal value.

[0068] On the water pump side, water flows through the heat exchanger and exchanges heat with the liquid cooling medium flowing out of the Tank. The proportional valve adjusts the opening value of the water passage based on the target temperature difference and the feedback signal value to control the flow rate of the water passing through the heat exchanger, thereby controlling the heat exchange efficiency of the liquid cooling medium. The liquid cooling medium with reduced temperature after heat exchange flows into the Tank again. The present application controls the flow rate of the water passing through the heat exchanger by the proportional valve to control the heat exchange efficiency, replaces the factor of the heat exchange efficiency from the temperature of the water to the flow rate of the water, and the flow rate of the water is controllable, thereby controlling the temperature control of the cooling liquid in the heat exchanger, and controlling the temperature difference of the liquid cooling medium flowing into and out of the Tank.

[0069] To further strengthen the control of the temperature difference, the present application further comprises the steps of:

[0070] S13: The computing device issues the target temperature difference and the feedback signal value to the circulating pump, and the circulating pump adjusts the flow rate of the cooling liquid based on the target temperature difference and the feedback signal value.

[0071] The circulating pump controls the rotating speed of the cooling liquid pump through the frequency converter, and adjusts the flow rate of the cooling liquid based on the target temperature difference and the feedback signal value

[0072] The inventor found that the conventional method does not have a proportional valve, so the water flow rate on the heat exchanger side is constant, that is, the heat exchange efficiency of the cooling liquid in the heat exchanger is only affected by the temperature of the water. The right circulating pump can only adjust the temperature difference of the supply liquid and the return liquid, and the temperature of the supply liquid is close to the temperature of the left water, so the temperature of the right liquid cooling medium will change with the change of the temperature of the left water, resulting in that the temperature difference of the cooling liquid in the Tank is difficult to control and maintain within a certain range. Based on the above finding, the inventor proposes the immersion liquid cooling data center constant temperature control method of the present application, sets a proportional valve, controls the flow rate of the water by the proportional method, controls the heat exchange efficiency of the heat exchanger to the liquid cooling medium by the flow rate of the water, sets a computing device connected to the proportional valve, the computing device issues the target temperature difference based on the current heat exchange demand to the proportional valve, the proportional valve adjusts according to the system supply liquid temperature difference, adopts PID control, adjusts the heat exchange efficiency of the water to the cooling liquid by adjusting the flow rate of the water, and ensures that the system supply liquid temperature is maintained at the set target temperature, so as to maintain the supply liquid and return liquid temperature difference in the Tank at the set target temperature.

[0073] Further, a circulating pump can be combined, and the pump adopts PID control of high and low temperature difference values in the tank to ensure that the temperature difference of the liquid supply and return in the tank is maintained at a set target temperature difference.

[0074] Figure 4 is a flow chart of the proportional valve adjusting the absolute temperature of the cold liquid working medium of the application, as shown in Figure 4 S12, the proportional valve adjusts the opening value of the water pipeline based on the target temperature difference and the feedback signal value, which includes:

[0075] S121: set the target signal value X according to the target temperature difference T , and obtain the feedback signal value X F .

[0076] S122: calculate the difference X between the target signal value and the feedback signal value D .

[0077] Then determine the size relationship between the difference between the target signal value and the feedback signal value and zero, and according to the size relationship between the difference between the target signal value and the feedback signal value and zero, adjust the opening value of the proportional valve.

[0078] Determine the size relationship between the difference between the target signal value and the feedback signal value and zero, if the target signal value is greater than the feedback signal value, that is, the difference between the target signal value and the feedback signal value is greater than zero, the proportional valve increases the opening value of the water flow pipeline in the heat exchanger through the opening signal, detects the flow value of the water in the heat exchanger, detects that the flow of the water in the heat exchanger increases, and judges that the target signal value and the feedback signal value are the same, that is, judges X T =X F , the proportional valve maintains the current opening value.

[0079] S123: determine the size relationship between the value of X D =X T -X F and zero, if X T >X F , execute steps S124 to S125, if X T X F , execute steps S126 to S127, if X T =X F , maintain the current opening value.

[0080] S124: if X T >X F , X D >0, the proportional valve increases the opening value of the water flow pipeline in the heat exchanger through the opening signal, and detects the flow value of the water in the heat exchanger.

[0081] X T >X FThis indicates that the actual temperature difference between the supply temperature of the coolant flowing into the tank and the return temperature is less than the target temperature difference, meaning that the actual cooling efficiency of the coolant in the heat exchanger is insufficient. Therefore, the proportional valve increases its opening signal to adjust the water flow through the heat exchanger, thereby enhancing the cooling efficiency of the water on the coolant and widening the actual temperature difference. The specific value of the increase in the opening signal is calculated by PID control. The PID calculation process is performed according to the current PID calculation method, and this embodiment of the invention does not impose any limitations.

[0082] The proportional valve increases the opening degree of the water flow pipes inside the heat exchanger by increasing the output opening degree signal.

[0083] S125: An increase in the water flow rate of the heat exchanger was detected, and it was determined that X... T =X F At this time, the proportional valve maintains its current opening value.

[0084] The system determines the relationship between the difference between the target signal value and the feedback signal value and zero. If the target signal value is less than the feedback signal value (i.e., the difference between the target signal value and the feedback signal value is less than zero), the proportional valve reduces the opening of the water flow pipe in the heat exchanger via the opening signal. The system then detects the water flow rate in the heat exchanger. If the water flow rate in the heat exchanger decreases, and the target signal value and the feedback signal value are the same, then X is determined to be... T =X F At this time, the proportional valve maintains its current opening value.

[0085] S126: If X T <X F X D <0, the proportional valve reduces the opening value of the water flow pipe in the heat exchanger through the opening signal, and detects the flow rate of water in the heat exchanger.

[0086] X T <X F This indicates that the actual temperature difference between the supply temperature of the coolant flowing into the tank and the return temperature is greater than the target temperature difference, meaning that the actual cooling efficiency of the coolant in the heat exchanger is too high. Therefore, the proportional valve reduces its opening signal to adjust the flow of water through the heat exchanger, thereby reducing the cooling efficiency of the water on the coolant and narrowing the actual temperature difference. The proportional valve calculates the specific value of the reduction in the opening signal using a PID controller. The PID calculation process is performed according to the current PID calculation method, and this embodiment of the invention does not impose any limitations.

[0087] The proportional valve reduces the opening of the water flow pipe in the heat exchanger by decreasing the output opening signal, and outputs a proportional valve opening value of 10 to 100.

[0088] S127: A decrease in the water flow rate of the heat exchanger was detected, and it was determined that X... T =X F At this time, the proportional valve maintains its current opening value.

[0089] Figure 5 is a flow chart of the circulating pump adjusting the relative temperature of the cold liquid working medium of the present application, as shown, S13 is executed, the process of the circulating pump adjusting the opening value of the water pipeline based on the target temperature difference and the feedback signal value includes: Figure 5

[0090] S131: set the target signal value X according to the target temperature difference T , obtain the feedback signal value X F .

[0091] S132: calculate the difference value X between the target signal value and the feedback signal value D .

[0092] Further judge the size relationship between the difference value between the target signal value and the feedback signal value and zero, and according to the size relationship between the difference value between the target signal value and the feedback signal value and zero, adjust the rotating speed of the circulating pump.

[0093] S133: judge the size relationship between the value of X D =X T -X F and zero, if X T >X F , execute steps S134 to S135, if X T X F , execute steps S136 to S137, if X T =X F , maintain the current rotating speed of the circulating pump.

[0094] Judge the size relationship between the difference value between the target signal value and the feedback signal value and zero, if the target signal value is greater than the feedback signal value, that is, the difference value between the target signal value and the feedback signal value is greater than zero, control the output frequency of the frequency converter to increase, so as to increase the rotating speed of the circulating pump, detect the flow value of the water in the heat exchanger, detect that the flow of the water of the heat exchanger increases, and judge that the target signal value and the feedback signal value are the same, that is, judge X T =X F , the circulating pump maintains the current rotating speed.

[0095] S134: if X T >X F , X D >0, control the output frequency of the frequency converter to increase, so as to increase the rotating speed of the circulating pump, and detect the flow value of the water in the heat exchanger.

[0096] X T >X F ​This indicates that the actual temperature difference between the supply temperature of the coolant flowing into the tank and the return temperature is less than the target temperature difference. The reason for this is that the coolant's cooling efficiency towards the chip is too low, resulting in insufficient heat exchange with the coolant and thus a smaller actual temperature difference. In other words, the coolant flowing out of the tank does not exchange enough heat with the chip, leading to a insufficient temperature difference between the supply and return temperatures. Therefore, increasing the circulation pump speed improves the heat exchange efficiency of the coolant and increases the return temperature, thereby increasing the actual temperature difference to bring it as close as possible to the target temperature difference.

[0097] The circulating pump calculates the specific increase in its rotational speed using a PID controller. The PID calculation process is performed according to the current PID calculation method, and this embodiment of the invention does not impose any limitations.

[0098] S135: An increase in the water flow rate of the heat exchanger was detected, and it was determined that X... T =X F At this time, the circulating pump maintains the current speed.

[0099] The system determines the relationship between the difference between the target signal value and the feedback signal value and zero. If the target signal value is less than the feedback signal value (i.e., the difference between the target signal value and the feedback signal value is less than zero), the inverter output frequency is reduced to decrease the circulating pump speed. The system also detects the water flow rate in the heat exchanger. If a decrease in water flow rate is detected, and the target signal value and the feedback signal value are the same, then X is determined to be... T =X F At the same time, maintain the current speed of the circulating pump.

[0100] S136: If X T <X F X D <0, the frequency of the inverter output is reduced to decrease the speed of the circulating pump, and the flow rate of water in the heat exchanger is detected.

[0101] The frequency converter outputs a pump speed control value of 45-150Hz.

[0102] X T <X F This indicates that the actual temperature difference between the supply temperature of the coolant flowing into the tank and the return temperature is greater than the target temperature difference. The reason for this is that the coolant's cooling efficiency towards the chip is too high, resulting in excessive heat exchange with the coolant and thus a large actual temperature difference. In other words, too much of the coolant flowing out of the tank fails to exchange heat with the chip, leading to a large temperature difference between the supply and return temperatures. Therefore, reducing the circulation pump speed, decreasing the coolant's heat exchange efficiency, and lowering the return temperature will reduce the actual temperature difference, bringing it closer to the target temperature difference.

[0103] The circulating pump reduces the specific value of the rotating speed of the circulating pump through PID calculation, and the PID calculation process is performed according to the PID calculation mode under the current technology, and the embodiment of the application is not limited.

[0104] S137: Detecting that the flow of water of the heat exchanger is reduced, and judging X T =X F , the current rotating speed of the circulating pump is maintained.

[0105] The application is designed to adopt two-stage PID speed regulation, one-stage PID regulation is used to regulate the flow rate of water on the primary side, control the absolute temperature of the liquid cooling working medium, and two-stage PID regulation is used to regulate the flow rate of the cooling working medium, control the relative temperature of the liquid cooling working medium in and out of the liquid. The two-stage speed regulation stabilizes the temperature of the liquid cooling working medium in a very small fluctuation range.

[0106] The embodiment of the application also provides a constant temperature control system for an immersed liquid cooling data center, which comprises a computing device, a proportional valve and a circulating pump, wherein the computing device is used to calculate a feedback signal value according to data transmitted by a sensor, set a target temperature difference according to data transmitted by the sensor or a user instruction, and send the target temperature difference and the feedback signal value to the proportional valve and the circulating pump.

[0107] The proportional valve is used to adjust the opening value of the water pipeline based on the target temperature difference and the feedback signal value; wherein the proportional valve is specifically used to perform the following processes:

[0108] The target signal value is set according to the target temperature difference, and the feedback signal value is obtained;

[0109] The difference between the target signal value and the feedback signal value is calculated;

[0110] The size relationship between the difference between the target signal value and the feedback signal value and zero is judged, and the opening value of the proportional valve is adjusted according to the size relationship between the difference between the target signal value and the feedback signal value and zero.

[0111] The size relationship between the difference between the target signal value and the feedback signal value and zero is judged, if the target signal value is greater than the feedback signal value, the proportional valve increases the opening value of the water flow pipeline in the heat exchanger through the opening signal, detects the flow value of water in the heat exchanger, detects that the flow of water of the heat exchanger is increased, and judges X T =X F , the proportional valve maintains the current opening value.

[0112] The size relationship between the difference between the target signal value and the feedback signal value and zero is judged, if the target signal value is less than the feedback signal value, the proportional valve reduces the opening value of the water flow pipeline in the heat exchanger through the opening signal, detects the flow value of water in the heat exchanger, detects that the flow of water of the heat exchanger is reduced, and judges X T =X F , the proportional valve maintains the current opening value.

[0113] The circulating pump is configured to adjust the flow rate of the cold liquid working medium based on the target temperature difference and the feedback signal value, wherein the circulating pump is configured to perform the following processes:

[0114] Setting a target signal value according to the target temperature difference, and obtaining a feedback signal value;

[0115] Calculating the difference between the target signal value and the feedback signal value;

[0116] Determining the size relationship between the difference between the target signal value and the feedback signal value and zero, and adjusting the rotating speed of the circulating pump according to the size relationship between the difference between the target signal value and the feedback signal value and zero.

[0117] Determining the size relationship between the difference between the target signal value and the feedback signal value and zero, and if the target signal value is greater than the feedback signal value, increasing the output frequency of the frequency converter to increase the rotating speed of the circulating pump, detecting the flow value of the water in the heat exchanger, and when the flow of the water in the heat exchanger is detected to increase and it is determined that X T = X F , the circulating pump maintains the current rotating speed.

[0118] Determining the size relationship between the difference between the target signal value and the feedback signal value and zero, and if the target signal value is less than the feedback signal value, decreasing the output frequency of the frequency converter to decrease the rotating speed of the circulating pump, detecting the flow value of the water in the heat exchanger, and when the flow of the water in the heat exchanger is detected to decrease and it is determined that X T = X F , the circulating pump maintains the current rotating speed.

[0119] The embodiments of the present application also provide an electronic device, comprising: one or more processors; and a storage device configured to store one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the steps performed by the computing device provided in the above-mentioned various embodiments.

[0120] Another aspect of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor of a computer, causes the computer to perform the steps performed by the computing device provided in the above-mentioned various embodiments. The computer-readable storage medium can be included in the electronic device described in the above-mentioned embodiments, or can exist separately and not be assembled into the electronic device.

[0121] Another aspect of the present application also provides a computer program product or a computer program, which comprises computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the steps performed by the computing device provided in the above-mentioned various embodiments.

[0122] In the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance. "Include" and "comprise" mentioned in the specification and claims are open terms, which should be interpreted as "including but not limited to".

[0123] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed by the present application should be covered by the claims of the present application.

Claims

1. A method for constant temperature control of an immersion liquid-cooled data center, characterized in that, The application is applied to the constant temperature control system of the submerged liquid cooling data center, and the constant temperature control system of the submerged liquid cooling data center comprises a computing device, a proportional valve and a circulating pump. The method comprises the following steps: The computing device calculates the feedback signal value according to the data transmitted by the sensor, and sets the target temperature difference according to the data transmitted by the sensor or the user instruction; 2. The method of claim 1, wherein, The computing device transmits the target temperature difference and the feedback signal value to the proportional valve, and the proportional valve adjusts the opening value of the water passage pipeline based on the target temperature difference and the feedback signal value. The method further comprises the following steps:

3. The method of claim 1, wherein, The computing device transmits the target temperature difference and the feedback signal value to the circulating pump, and the circulating pump adjusts the flow rate of the cold liquid working medium based on the target temperature difference and the feedback signal value. The computing device transmits the target temperature difference and the feedback signal value to the proportional valve, and the proportional valve adjusts the opening value of the water passage pipeline based on the target temperature difference and the feedback signal value, which comprises the following steps: Set the target signal value according to the target temperature difference, and obtain the feedback signal value; Calculate the difference between the target signal value and the feedback signal value; 4. The method of claim 3, wherein, Determine the size relationship between the difference between the target signal value and the feedback signal value and zero, and adjust the opening value of the proportional valve according to the size relationship between the difference between the target signal value and the feedback signal value and zero. Determine the size relationship between the difference between the target signal value and the feedback signal value and zero, and adjust the opening value of the proportional valve according to the size relationship between the difference between the target signal value and the feedback signal value and zero, which comprises the following steps:

5. The method of claim 3, wherein, Determine the size relationship between the difference between the target signal value and the feedback signal value and zero, and if the target signal value is greater than the feedback signal value, the proportional valve increases the opening value of the water flow pipeline in the heat exchanger through the opening signal, detects the flow value of the water in the heat exchanger, and when it is detected that the flow of the water in the heat exchanger is increased and it is determined that the target signal value and the feedback signal value are the same, the proportional valve maintains the current opening value. Determine the size relationship between the difference between the target signal value and the feedback signal value and zero, and adjust the opening value of the proportional valve according to the size relationship between the difference between the target signal value and the feedback signal value and zero, which comprises the following steps:

6. The method of claim 2, wherein, Determine the size relationship between the difference between the target signal value and the feedback signal value and zero, and if the target signal value is less than the feedback signal value, the proportional valve reduces the opening value of the water flow pipeline in the heat exchanger through the opening signal, detects the flow value of the water in the heat exchanger, and when it is detected that the flow of the water in the heat exchanger is reduced and it is determined that the target signal value and the feedback signal value are the same, the proportional valve maintains the current opening value. The computing device transmits the target temperature difference and the feedback signal value to the circulating pump, and the circulating pump adjusts the flow rate of the cold liquid working medium based on the target temperature difference and the feedback signal value, which comprises the following steps: Set the target signal value according to the target temperature difference, and obtain the feedback signal value; Calculate the difference between the target signal value and the feedback signal value; 7. The method of claim 6, wherein, Determine the size relationship between the difference between the target signal value and the feedback signal value and zero, and adjust the rotational speed of the circulating pump according to the size relationship between the difference between the target signal value and the feedback signal value and zero. Adjust the rotational speed of the circulating pump according to the size relationship between the difference between the target signal value and the feedback signal value and zero, which comprises the following steps: The difference between the target signal value and the feedback signal value is compared with zero, if the target signal value is greater than the feedback signal value, the output frequency of the frequency converter is increased to increase the rotating speed of the circulating pump, the flow value of the water in the heat exchanger is detected, when the flow value of the water in the heat exchanger is increased and the target signal value is equal to the feedback signal value, the rotating speed of the circulating pump is maintained.

8. The method of claim 6, wherein, According to the difference between the target signal value and the feedback signal value, the rotating speed of the circulating pump is adjusted, including: The difference between the target signal value and the feedback signal value is compared with zero, if the target signal value is less than the feedback signal value, the output frequency of the frequency converter is decreased to decrease the rotating speed of the circulating pump, the flow value of the water in the heat exchanger is detected, when the flow value of the water in the heat exchanger is decreased and the target signal value is equal to the feedback signal value, the rotating speed of the circulating pump is maintained.

9. An immersion liquid-cooled data center thermostatic control system, characterized in that, The application comprises a computing device, a proportional valve and a circulating pump, wherein the computing device is used to calculate the feedback signal value according to the data transmitted by the sensor, set the target temperature difference according to the data transmitted by the sensor or the user instruction, and send the target temperature difference and the feedback signal value to the proportional valve and the circulating pump; The proportional valve is used to adjust the opening value of the water pipeline based on the target temperature difference and the feedback signal value; The circulating pump is used to adjust the flow rate of the cold liquid working medium based on the target temperature difference and the feedback signal value.

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