Water cooling system and control method

Abstract

The invention relates to the technical field of refrigeration control, in particular to a water cooling system, a control method and a first-stage water cooling assembly, the water cooling system comprises a first circulation loop piece, a first control piece and a first adjusting piece, the first control piece is arranged on the first circulation loop piece, and the first adjusting piece is arranged on the first circulation loop piece; the second-stage water cooling assembly comprises a second circulation loop piece, a second control piece and a second adjusting piece, the second circulation loop piece is arranged on the first control piece and the first adjusting piece, the second control piece is arranged on the second circulation loop piece, the second adjusting piece is arranged on the second circulation loop piece, and the second control piece is arranged on the second circulation loop piece. Through interaction between the first-stage water cooling assembly and the second-stage water cooling assembly and combination of fuzzy control through PID, when semiconductor equipment and a particle accelerator operate, the water inlet temperature of a load can be accurately controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration control, and in particular to a water cooling system and a control method. Background Art

[0002] Semiconductor equipment and particle accelerators are widely used in chip production, scientific exploration and other fields. During operation, semiconductor manufacturing equipment, laser devices, optical equipment, and accelerator cavities will generate a large amount of heat. If appropriate heat dissipation or cooling measures are not taken, the semiconductor equipment or accelerator will not be able to operate normally. In addition, these devices have very high requirements for water temperature precision. If it cannot be accurately controlled, it will lead to abnormal production or test failure.

[0003] Semiconductor equipment and particle accelerators require very precise water inlet temperature, which generally needs to reach ±0.1°C or above. The water temperature control of some linear accelerators even needs to reach ±0.05°C.

[0004] Existing equipment problems: 1. The current equipment can achieve high-precision temperature control. However, when the existing technology uses a three-way valve to adjust the 1st-level branch, the three-way valve position is adjusted during high-precision adjustment, which causes the flow resistance of the entire system to change, resulting in flow fluctuations, and then causing the outlet water temperature of the chiller to fluctuate. Ultimately, it is difficult to further improve the temperature control accuracy of the load inlet water of the 2nd-level branch.

[0005] 2. At present, the chiller and three-way valve of the equipment are controlled by ordinary PID. The disadvantage is that the adjustment parameters are fixed. For the pursuit of precise temperature control, it can be further improved. Summary of the invention

[0006] In view of the fact that the above-mentioned existing equipment can achieve high-precision temperature control, and the prior art adopts a three-way valve for adjustment in the first-level branch, the three-way valve position is adjusted during high-precision adjustment, resulting in changes in the flow resistance of the entire system, thereby causing flow fluctuations, and then causing the outlet water temperature of the chiller to fluctuate, and ultimately the load inlet temperature control accuracy of the second-level branch is difficult to further improve; the chiller and the three-way valve of the current equipment are both controlled by ordinary PID, and the disadvantage is that the adjustment parameters are fixed. For the pursuit of precise temperature control, there is a problem that can be further improved, and the present invention is proposed.

[0007] Therefore, an object of the present invention is to provide a water cooling system.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a water cooling system, comprising: A primary water cooling component, comprising a first circulation loop component, a first control component and a first adjustment component, wherein the first control component is on the first circulation loop component, and the first adjustment component is arranged on the first circulation loop component; and, The secondary water cooling component includes a second circulation loop, a second control component and a second adjustment component. The second circulation loop is arranged on the first control component and the first adjustment component, the second control component is arranged on the second circulation loop, and the second adjustment component is arranged on the second circulation loop.

[0009] As a preferred solution of a water cooling system of the present invention, wherein: the first circulation loop includes a first pipeline, a chiller and a second pipeline, the first pipeline and the second pipeline are respectively arranged on both sides of the chiller, the first pipeline and the second pipeline constitute a primary circulation, the chiller can adjust the cooling capacity according to the set temperature to maintain the stability of the outlet water temperature and meet the system's requirements for temperature accuracy. The chiller helps to improve the stability and reliability of the entire water cooling system by stabilizing the outlet water temperature.

[0010] As a preferred solution of a water cooling system of the present invention, wherein: the first control component includes a first circulation pump and a first temperature transmitter fixedly connected on the first pipeline, the first circulation pump is arranged on the left side of the first temperature transmitter, that is, closer to the side of the chiller, the first circulation pump is responsible for the initial cooling of the entire system, it needs to drive water to flow through the chiller for heat exchange to achieve the purpose of initial cooling, the working state of the first circulation pump directly affects the cooling effect of the chiller, so it needs to adjust the flow rate according to the refrigeration capacity of the chiller and the overall needs of the system, the first temperature transmitter is used to monitor the cooling water temperature entering the first circulation pump, which helps to understand the outlet water temperature of the chiller, thereby evaluating the cooling effect of the chiller, the first circulation pump and the first temperature transmitter are mainly responsible for cooling and temperature control.

[0011] As a preferred solution of a water cooling system of the present invention, wherein: the first adjusting component includes a second temperature transmitter fixedly connected to the second pipeline, a first water storage tank is arranged on one side of the second temperature transmitter, a first filter is arranged on one side of the water storage tank, a third temperature transmitter is arranged on one side of the first filter, a three-way valve is arranged on one side of the third temperature transmitter, the first water storage tank, the first filter, the third temperature transmitter and the three-way valve are all fixedly connected to the second pipeline, and the chiller and the three-way valve work together to adjust the temperature according to temperature fluctuations.

[0012] As a preferred solution of a water cooling system of the present invention, the second circulation loop includes a plate heat exchanger fixedly connected between the first pipeline and the second pipeline, a third pipeline and a second pipeline fixedly connected on the other side of the plate heat exchanger, and the third pipeline and the fourth pipeline constitute a secondary circulation. The medium in the secondary circulation is deionized water. Deionized water ensures the purity of water quality, avoids negative impact on equipment performance and helps to achieve more precise temperature control to meet further temperature regulation control.

[0013] As a preferred solution of a water cooling system of the present invention, the second control component includes a second circulation pump and a fourth temperature transmitter fixedly connected to the third pipeline, the position of the second circulation pump is closer to the plate heat exchanger than the position of the fourth temperature transmitter, the second circulation pump is responsible for further accurately controlling the temperature of the water that has passed the primary circulation cooling to meet the high requirements of the equipment for water temperature accuracy, the working state of the second circulation pump needs to be finely adjusted according to the heat exchange effect of the plate heat exchanger to achieve higher precision temperature control, the fourth temperature transmitter is responsible for monitoring the temperature of the cooling water, but they are more focused on monitoring the temperature of the inlet and outlet of the plate heat exchanger.

[0014] As a preferred solution of a water cooling system of the present invention, wherein: the second adjusting component includes a fifth temperature transmitter fixedly connected to the fourth pipeline, a second water tank arranged on one side of the fifth temperature transmitter, a second filter arranged on one side of the outlet of the second water tank, a sixth temperature transmitter arranged on one side of the outlet of the second filter, a load fixedly connected to the third pipeline and the fourth pipeline near the fourth temperature transmitter and the sixth temperature transmitter, the second water tank, the second filter and the sixth temperature transmitter are all fixedly connected to the fourth pipeline, thereby realizing precise temperature control, a load is fixedly connected to one side of the sixth temperature transmitter on the fourth pipeline, and the temperature fluctuation of the load can be precisely adjusted.

[0015] A water cooling control method, comprising the above-mentioned water cooling system, comprises the following steps: First, in the primary cycle, the first circulation loop is used to perform preliminary temperature adjustment according to the temperature fluctuation; Secondly, through the primary circulation and then to the secondary circulation, the first regulating member is used to dynamically and accurately regulate the flow rate according to the measured water temperature to achieve the purpose of stabilizing the water temperature; Finally, fuzzy control is combined with PID control to generate fuzzy input values ​​according to the input data, and the dynamic adjustment values ​​of the PID parameters are obtained through fuzzy logic control. As the absolute difference between the target water temperature and the actual water temperature changes, dynamic adjustment of the PID parameters within a local range is achieved. Through the adjustment of the secondary cycle, the system can respond to temperature changes more accurately and achieve more stable temperature control.

[0016] As a preferred solution of a water cooling control method of the present invention, wherein: calculating the PID control output , among which is the proportionality coefficient, is the integration coefficient, is the differential coefficient, It's time. It is the temperature fluctuation value. When the temperature difference is large, increase the proportional coefficient and enhance the corresponding speed. When the temperature difference is small, optimize the integral coefficient and reduce the oscillation. When the temperature difference changes rapidly, the fluctuation amplitude is large in a short time. Adjust the differential coefficient to improve stability.

[0017] As a preferred solution of a water cooling control method of the present invention, the water cooling system is continuously monitored and intelligently controlled according to the adjusted PID parameters to ensure that the water cooling system operates stably within the optimal production range.

[0018] The beneficial effects of the present invention are as follows: through the coordinated work of the two-stage water cooling components, the load inlet water temperature of the semiconductor equipment or particle accelerator during operation is accurately controlled, and the temperature control accuracy reaches ±0.05°C, meeting the high-precision cooling requirements. The outlet water temperature is stabilized by the chiller, which improves the stability and reliability of the entire water cooling system and reduces the risk of equipment failure caused by temperature fluctuations. The system can dynamically adjust the cooling capacity according to the actual temperature requirements, avoid overcooling, achieve energy saving and improve efficiency. Combined with fuzzy control and PID control, the system can intelligently respond to temperature changes, automatically adjust parameters, reduce manual intervention, and improve the automation level of the system. Precise temperature control avoids damage to the equipment due to overheating or overcooling, thereby extending the service life of the equipment. The water cooling system can respond quickly to temperature changes, shortening the time required for the equipment to reach a stable operating temperature and improving production efficiency. The medium in the secondary circulation uses deionized water to ensure the purity of the water quality and avoid negative impacts on equipment performance. Due to the improvement of system stability and reliability, the number of system maintenance and maintenance costs are reduced. Precise temperature control helps to improve the product quality of semiconductor equipment or particle accelerator operation, ensure product consistency and reliability, and reduce energy consumption and environmental impact by precisely controlling temperature, which is in line with the development trend of green environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 The figure is a schematic structural diagram of a water cooling system of the present invention.

[0021] Figure 2 The figure is a flow chart of a water cooling control method of the present invention.

[0022] Description of the drawings: 100, primary water cooling assembly; 101, first circulation loop component; 101a, first pipeline; 101b, chiller; 101c, second pipeline; 102, first control component; 102a, first circulation pump; 102b, first temperature transmitter; 103, first adjustment component; 103a, second temperature transmitter; 103b, first water storage tank; 103c, first filter; 103d, third temperature transmitter; 103e, third Pass valve; 200, secondary water cooling component; 201, second circulation loop component; 201a, plate heat exchanger; 201b, third pipeline; 201c, fourth pipeline; 202, second control component; 202a, second circulation pump; 202b, fourth temperature transmitter; 203, second adjustment component; 203a, fifth temperature transmitter; 203b, second water tank; 203c, second filter; 203d, sixth temperature transmitter; 203e, load. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0027] Example 1 Reference Figure 1 , which is the first embodiment of the present invention, provides a water cooling system, which includes a primary water cooling component 100, including a first circulation loop component 101, a first control component 102 and a first adjustment component 103. The first control component 102 is on the first circulation loop component 101, and the first adjustment component 103 is arranged on the first circulation loop component 101. Through the interaction between the first circulation loop component 101, the first control component 102 and the first adjustment component 103, not only the preliminary temperature adjustment of the primary circulation can be achieved, but also preparation for the secondary circulation can be made.

[0028] Specifically, the first circulation loop component 101 includes a first pipeline 101a, a chiller 101b and a second pipeline 101c. The first pipeline 101a and the second pipeline 101c are respectively arranged on both sides of the chiller 101b. The first pipeline 101a and the second pipeline 101c are respectively fixedly connected on both sides of the chiller 101b. The first pipeline 101a and the second pipeline 101c form a primary circulation. The chiller 101b can adjust the cooling capacity according to the set temperature to keep the outlet water temperature stable and meet the system's requirements for temperature accuracy. The chiller 101b helps to improve the stability and reliability of the entire water cooling system by stabilizing the outlet water temperature.

[0029] Furthermore, the first control unit 102 includes a first circulating pump 102a and a first temperature transmitter 102b fixedly connected to the first pipeline 101a. The first circulating pump 102a is located at the inlet of the chiller 101b. The first circulating pump 102a is arranged on the left side of the first temperature transmitter 102b, that is, closer to the chiller 101b. The first circulating pump 102a is responsible for the initial cooling of the entire system. It needs to drive the water flow through the chiller 101b for heat exchange to achieve the purpose of initial cooling. The working state of the first circulation pump 102a directly affects the cooling effect of the chiller 101b, so it needs to adjust the flow rate according to the refrigeration capacity of the chiller 101b and the overall needs of the system. The first temperature transmitter 102b is used to monitor the temperature of the cooling water entering the first circulation pump 102a, which helps to understand the outlet water temperature of the chiller 101b, thereby evaluating the cooling effect of the chiller 101b. The first circulation pump 102a and the first temperature transmitter 102b are mainly responsible for cooling and temperature control.

[0030] Furthermore, the first regulating member 103 includes a second temperature transmitter 103a fixedly connected to the second pipeline 101c, the second temperature transmitter 103a is also arranged at the water outlet of the chiller 101b, a first water storage tank 103b is arranged on one side of the second temperature transmitter 103a, a first filter 103c is arranged on one side of the water storage tank, a third temperature transmitter 103d is arranged on one side of the first filter 103c, a three-way valve 103e is arranged on one side of the third temperature transmitter 103d, the first water storage tank 103b, the first filter 103c, the third temperature transmitter 103d and the three-way valve 103e are all fixedly connected to the second pipeline 101c in sequence, and the chiller 101b and the three-way valve 103e work together to adjust the temperature according to the temperature fluctuation; Among them, the first temperature transmitter 102b, the second temperature transmitter 103a and the second temperature transmitter 103a are responsible for monitoring the outlet water temperature and return water temperature of the chiller 101b, so that the control system adjusts the operating parameters of the chiller 101b according to these temperature data to achieve preliminary temperature control.

[0031] During operation, in the operation of the primary circulation loop, the first temperature transmitter 102b monitors the cooling water temperature entering the chiller 101b, and the second temperature transmitter 103a monitors the outlet water temperature of the chiller 101b. These two temperature data provide key feedback information for the control system, so that the system can adjust the operating status of the chiller 101b in time to maintain the set outlet water temperature. The first water storage tank 103b is used to store cooling water to ensure the stability of the water flow of the system and provide a certain temperature buffer. The first filter 103c is installed after the water storage tank to remove impurities and particulate matter in the water, protect subsequent equipment from pollution, ensure water cleanliness, and thus improve heat exchange efficiency. The third temperature transmitter 103d monitors the cooling water temperature after passing through the first filter 103c and provides temperature feedback for the three-way valve 103e. The three-way valve 103e adjusts the opening according to the feedback signal to control the flow direction of cooling water to achieve precise control of the outlet water temperature. This regulation allows the system to respond quickly to varying load 203e and environmental conditions, maintaining a constant outlet water temperature.

[0032] The chiller 101b automatically adjusts the operating frequency of the compressor and the flow rate of the refrigerant according to the temperature data provided by the first temperature transmitter 102b and the second temperature transmitter 103a to adapt to the changes in ambient temperature and the requirements of the system load 203e to ensure the stability of the outlet water temperature. The interaction between the first circulation loop component 101, the first control component 102 and the first adjustment component 103 realizes the preliminary temperature adjustment of the primary circulation and prepares for the precise control of the secondary circulation. This design enables the system to adapt to different ambient temperatures while the external cooling equipment also provides a basis for more precise temperature control.

[0033] Example 2 Reference Figure 1 , which is the second embodiment of the present invention, provides a water cooling system, which includes a secondary water cooling assembly 200, including a second circulation loop component 201, a second control component 202 and a second adjustment component 203, the second circulation loop is arranged on the first control component 102 and the first adjustment component 103, the second control component 202 is arranged on the second circulation loop, and the second adjustment component 203 is arranged on the second circulation loop. The interaction between the entire secondary circulation loop component, the second control component 202 and the second adjustment component 203, and the coordinated work with the primary circulation enable the system to achieve intelligent temperature control. This control strategy not only improves the response speed of the system, but also enhances the stability and reliability of the system.

[0034] Specifically, the second circulation loop 201 includes a plate heat exchanger 201a fixedly connected between the first pipeline 101a and the second pipeline 101c, and a third pipeline 201b and a second pipeline 101c fixedly connected on the other side of the plate heat exchanger 201a. The plate heat exchanger 201a allows cooling water to exchange heat, and can more accurately control the temperature of the cooling water during heat exchange, so that the temperature control of the cooling water is improved and can at least reach the requirement of ±0.5°C. The third pipeline 201b and the fourth pipeline 201c form a secondary circulation. The medium in the secondary circulation is deionized water. Deionized water ensures the purity of water quality, avoids negative impact on equipment performance, and helps to achieve more accurate temperature control to meet further temperature regulation control.

[0035] Furthermore, the second control component 202 includes a second circulation pump 202a and a fourth temperature transmitter 202b fixedly connected to the third pipeline 201b. The position of the second circulation pump 202a is closer to the plate heat exchanger 201a than the position of the fourth temperature transmitter 202b. The water enters the plate heat exchanger 201a through the second circulation pump 202a. The second circulation pump 202a is responsible for further accurately controlling the temperature of the water that has undergone primary circulation cooling to meet the high requirements of the equipment for water temperature accuracy. The working state of the second circulation pump 202a needs to be finely adjusted according to the heat exchange effect of the plate heat exchanger 201a to achieve higher-precision temperature control. The fourth temperature transmitter 202b is responsible for monitoring the temperature of the cooling water, but they are more focused on monitoring the temperature of the inlet and outlet of the plate heat exchanger 201a.

[0036] Furthermore, the second regulating member 203 includes a fifth temperature transmitter 203a fixedly connected to the fourth pipeline 201c, a second water storage tank 203b arranged on one side of the fifth temperature transmitter 203a, a second filter 203c arranged on one side of the outlet of the second water storage tank 203b, a sixth temperature transmitter 203d arranged on one side of the outlet of the second filter 203c, a load 203e fixedly connected to the third pipeline 201b and the fourth pipeline 201c near the fourth temperature transmitter 202b and the sixth temperature transmitter 203d, and the second water storage tank 203b, the second filter 203c and the sixth temperature transmitter 203d are all fixedly connected. It is connected to the fourth pipeline 201c to achieve precise temperature control. One side of the sixth temperature transmitter 203d is fixedly connected to a load 203e on the fourth pipeline 201c. The temperature fluctuation of the load 203e can be precisely adjusted. The working state of the second circulation pump 202a needs to be finely adjusted according to the heat exchange effect of the plate heat exchanger 201a and the specific needs of the load 203e. The cooling water will flow into the load 203e and cool the load 203e. Therefore, the water temperature accuracy of the cooling water entering the load 203e is improved, the temperature fluctuation of the cooling water entering the load 203e is reduced, and the temperature control accuracy of the cooling water is improved.

[0037] During the operation, in the operation of the secondary circulation loop, the system first starts the second circulation pump 202a to transport the water pre-cooled by the primary circulation to the plate heat exchanger 201a for further temperature control. The start of the second circulation pump 202a ensures the continuous water flow of the secondary circulation and provides power for precise temperature control. The fourth temperature transmitter 202b and the sixth temperature transmitter 203d respectively monitor the water temperature at the inlet and outlet of the plate heat exchanger 201a and provide real-time temperature data. These data are crucial to the control system because they directly affect the adjustment decision of the three-way valve 103e and the working state of the second circulation pump 202a. As the core component of the secondary circulation, the plate heat exchanger 201a can quickly adjust the temperature of the cooling water through its efficient heat exchange capacity to meet the high requirements of the equipment for water temperature accuracy. The design and material selection of the plate heat exchanger 201a are crucial to maintaining high heat exchange efficiency and corrosion resistance. Based on the temperature feedback provided by the fourth temperature transmitter 202b and the sixth temperature transmitter 203d, the three-way valve 103e dynamically adjusts the fluid flow entering the plate heat exchanger 201a to maintain a constant operating temperature. The precise adjustment capability of the three-way valve 103e is the key to achieving a temperature control level of ±0.05°C.

[0038] The medium in the secondary circulation is deionized water, which has high purity and does not contain any ions. This helps to improve the heat exchange efficiency, reduce corrosion and scaling in the system, and ensure the long-term stable operation of the system. The second water tank 203b is used to store deionized water to ensure the stability of the water flow of the system and provide a certain temperature buffer. The second filter 203c is installed after the water tank to remove tiny impurities in the water, protect subsequent equipment from pollution, and ensure clean water quality. After the cooling water is precisely adjusted by the plate heat exchanger 201a and the three-way valve 103e, it flows into the load 203e and cools the load 203e. By precisely controlling the temperature of the cooling water entering the load 203e, the system can reduce temperature fluctuations and improve the temperature control accuracy of the cooling water.

[0039] Example 3 Reference Figure 1 - Figure 2 , which is the third embodiment of the present invention, provides a water cooling system and control method, the contents of which are as follows: First, in the primary cycle, the first circulation loop 101 is used to perform preliminary temperature adjustment according to the temperature fluctuation; wherein the following steps are included: S1. Temperature data acquisition and comparison: Set the target temperature range to , obtain real-time temperature data T through the temperature transmitter and calculate the temperature fluctuation amplitude ; S2. Determine the temperature fluctuation range: If , then it enters the initial adjustment stage of the primary cycle; S3, start the first circulation loop component 101, and adjust the heat transfer rate by controlling the fluid flow rate Q and flow velocity v in the circulation; Among them, the fluid flow Q is controlled by the first circulating pump 102a, which adjusts its operating speed according to the real-time temperature data provided by the first temperature transmitter 102b, thereby changing the fluid flow. The adjustment of the flow directly affects the efficiency of heat exchange. More flow can increase the frequency of heat exchange, thereby improving the cooling effect. The flow rate is also controlled by the first circulating pump 102a. The change in flow rate will affect the contact time and efficiency of the fluid with the heat exchanger surface. The optimization of the flow rate can ensure the uniform distribution of the fluid in the heat exchanger to avoid local overheating or overcooling. The heat transfer rate is closely related to the thermal capacity, flow rate and flow rate of the fluid. By adjusting these parameters, the heat transferred from the chiller 101b to the first pipeline 101a and the second pipeline 101c can be controlled. The adjustment of the heat transfer rate helps to maintain the stability of the outlet water temperature and meet the system's requirements for temperature accuracy.

[0040] S4. Apply PID control algorithm: Use PID control algorithm to control the temperature fluctuation value Processing and calculation of PID control output ,in is the proportionality coefficient, is the integration coefficient, is the differential coefficient, It's time. is the temperature fluctuation value; S5, dynamic input transfer: the output temperature of the first cycle As dynamic input, it is passed to the secondary control mechanism to judge Is it within the set range? ,like Within the scope, record the current state and pass it to the secondary loop. If If it is not within the range, the first circulation circuit 101 continues to be executed to perform temperature control.

[0041] Among them, the process of temperature control in the primary cycle is described according to the above steps, from the acquisition of temperature data, the determination of fluctuation amplitude, the start of the circulation loop, the application of PID control, to the transmission of dynamic input and the preparation of the secondary cycle.

[0042] Secondly, through the primary circulation and then the secondary circulation, the first regulating member 103 is used to accurately regulate the flow rate according to the measured water temperature to achieve the purpose of stabilizing the water temperature; wherein, the following steps are included: S1. Temperature data acquisition and comparison: Set the fluid target temperature range to , obtain the current fluid temperature through the temperature transmitter , calculate the temperature fluctuation amplitude ; S2, fuzzy control input: the temperature error value As the input of fuzzy control; S3, temperature error value fuzzification: the calculated temperature error value Fuzzification, and divided into the first level, second level and third level, define the fuzzy set Low, Medium, High; S4, fuzzy logic rule calculation: According to the preset fuzzy logic rules, calculate the flow adjustment range and set the fuzzy rules, for example: if is Low, the flow adjustment range is Small. If the value is Medium, the flow adjustment range is Medium. If it is High, the flow adjustment range is Large, where the adjustment ranges Small, Medium, and Large are members of the fuzzy set, which are used to describe the fuzzification and defuzzification process of the control variable (such as the flow adjustment range). Small means a small adjustment range, which is usually used for fine-tuning; Medium means a moderate adjustment range, which is used for medium-level adjustments; Large means a large adjustment range, which is used for large-scale adjustments; S5, start the first regulating member: start the first regulating member 103, dynamically adjust the flow rate according to the calculation result of step 4, optimize the heat transfer rate in the secondary circulation, monitor the temperature change during the regulation process in real time, and ensure that the error is gradually reduced; The fuzzification and defuzzification mechanisms are as follows: The absolute value of the difference between the target water temperature and the actual water temperature is taken as E, and its value range is [0-3]. The part above 3 is not considered for the time being.

[0043] Take the PID parameters after system tuning, take P parameter as an example, and the other parameters are the same.

[0044] Assume that the current setting value of the P parameter is 0.5, take its ±20% range, denoted as U, and its range is U=[0.4-0.6].

[0045] Define fuzzy subsets for E, which are divided into: small deviation, slightly medium deviation, and slightly large deviation, corresponding to 0, 1, and 2 respectively, using the formula Fuzzify E and get the y value, that is, the fuzzy input e, where x is any value within the range of E, a=0, b=3, and n=1.

[0046] After calculating the y value, calculate the corresponding membership , Define fuzzy subsets for U: low scale factor, medium scale factor, high scale factor, represented by 0, 1, and 2 respectively, using the formula Fuzzify U and get the y1 value, that is, the fuzzy output u, where x1 is any value within the range of U, a=0, b=3, and n=1.

[0047] After calculating the y1 value, calculate the corresponding membership , Through the fuzzy input e∩fuzzy relation R, the membership relation subset of the fuzzy output u is obtained, where the fuzzy relation is: , , Then the membership relationship subset of the fuzzy output u is defuzzified to obtain the actual P parameter value.

[0048] For example, the membership relationship subset of the calculated fuzzy output u is 0 (belongs to 0), 0.5 (belongs to 1), and 0.5 (belongs to 2).

[0049] The fuzzy output u is obtained by the following formula: u=(0(membership degree)×0(membership to 0)+0.5(membership degree)×1(membership to 1)+0.5(membership degree)×2(membership to 2)) / (0(membership to 0)+1(membership to 1)+2(membership to 2))=0.5.

[0050] The fuzzy output u is then defuzzified and transformed to U=0.1u+0.4, and mapped to the actual P parameter value. For example, when u=0.5, U=0.45. The above is an example of P parameters, and the adjustment ideas of I and D parameters are the same.

[0051] The water cooling system is continuously tested and intelligently controlled according to the adjusted PID parameters to ensure stable operation of the water cooling system within the optimal production range.

[0052] Finally, by adjusting the secondary cycle, the system can respond to temperature changes more accurately and achieve more stable temperature control; which includes the following steps: S1, temperature difference calculation: set the control water temperature to , get the current water temperature through the temperature transmitter , calculate the temperature difference ; S2, fuzzy control input: the temperature difference As the input of fuzzy control; S3, Dynamically generate PID parameters: According to fuzzy logic rules, dynamically generate the adjustment values ​​of PID parameters (P, I, D), set fuzzy rules, for example: if Larger, increase the proportionality factor P, if Small, optimize the integral coefficient I, if Rapid changes, adjust the differential coefficient D; S4, PID parameter adjustment: According to the fuzzy logic rules, calculate the adjustment value of the PID parameter and set the adjustment formula, for example: ,in, is the adjusted value, is the value before adjustment, To adjust the range value; S5. Apply the dynamically adjusted PID parameters to the control model to perform precise regulation within a local range.

[0053] Through the temperature control process, from the calculation of temperature difference, the input of fuzzy control, the dynamic generation and adjustment of PID parameters, to the application of control model and continuous monitoring, through this fuzzy control and dynamic adjustment of PID parameters, the system can respond to temperature changes more accurately and achieve more stable temperature control.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A water cooling system, characterized in that: include, A primary water cooling component (100), comprising a first circulation loop component (101), a first control component (102) and a first adjustment component (103), wherein the first control component (102) is on the first circulation loop component (101), and the first adjustment component (103) is arranged on the first circulation loop component (101); and The secondary water cooling component (200) comprises a second circulation loop component (201), a second control component (202) and a second regulating component (203), wherein the second circulation loop is arranged on the first control component (102) and the first regulating component (103), the second control component (202) is arranged on the second circulation loop, and the second regulating component (203) is arranged on the second circulation loop.

2. The water cooling system according to claim 1, characterized in that: The first circulation loop component (101) comprises a first pipeline (101a), a chiller (101b) and a second pipeline (101c); the first pipeline (101a) and the second pipeline (101c) are respectively arranged on both sides of the chiller (101b); the first pipeline (101a) and the second pipeline (101c) form a primary circulation; the chiller (101b) can adjust the cooling capacity according to the set temperature to maintain the stability of the outlet water temperature and meet the system's requirements for temperature accuracy; the chiller (101b) helps to improve the stability and reliability of the entire water cooling system by stabilizing the outlet water temperature.

3. The water cooling system according to claim 2, characterized in that: The first control component (102) includes a first circulation pump (102a) and a first temperature transmitter (102b) fixedly connected to the first pipeline (101a). The first circulation pump (102a) is arranged on the left side of the first temperature transmitter (102b), that is, closer to the side of the chiller (101b). The first circulation pump (102a) is responsible for the initial cooling of the entire system. It needs to drive water to pass through the chiller (101b) for heat exchange to achieve the purpose of initial cooling. The first circulation pump (102a) The working state of the chiller (101b) directly affects the cooling effect of the chiller (101b), so it is necessary to adjust the flow rate according to the refrigeration capacity of the chiller (101b) and the overall demand of the system. The first temperature transmitter (102b) is used to monitor the temperature of the cooling water entering the first circulation pump (102a), which helps to understand the outlet water temperature of the chiller (101b), thereby evaluating the cooling effect of the chiller (101b). The first circulation pump (102a) and the first temperature transmitter (102b) are mainly responsible for cooling and temperature control.

4. The water cooling system according to claim 3, characterized in that: The first regulating member (103) comprises a second temperature transmitter (103a) fixedly connected to the second pipeline (101c); a first water storage tank (103b) is arranged on one side of the second temperature transmitter (103a); a first filter (103c) is arranged on one side of the water storage tank; a third temperature transmitter (103d) is arranged on one side of the first filter (103c); a three-way valve (103e) is arranged on one side of the third temperature transmitter (103d); the first water storage tank (103b), the first filter (103c), the third temperature transmitter (103d) and the three-way valve (103e) are all fixedly connected to the second pipeline (101c); the chiller (101b) and the three-way valve (103e) work together to adjust the temperature according to temperature fluctuations.

5. The water cooling system according to claim 3 or 4, characterized in that: The second circulation loop (201) comprises a plate heat exchanger (201a) fixedly connected between the first pipeline (101a) and the second pipeline (101c), and a third pipeline (201b) and the second pipeline (101c) fixedly connected on the other side of the plate heat exchanger (201a). The third pipeline (201b) and the fourth pipeline (201c) form a secondary circulation. The medium in the secondary circulation is deionized water. The deionized water ensures the purity of the water quality, avoids negative impact on the performance of the equipment, and helps to achieve more accurate temperature control to meet further temperature regulation control.

6. The water cooling system according to claim 5, characterized in that: The second control component (202) comprises a second circulation pump (202a) and a fourth temperature transmitter (202b) fixedly connected to the third pipeline (201b); the second circulation pump (202a) is located closer to the plate heat exchanger (201a) than the fourth temperature transmitter (202b); the second circulation pump (202a) is responsible for further accurately controlling the temperature of water that has undergone primary circulation cooling to meet the high requirements of the equipment for water temperature accuracy; the working state of the second circulation pump (202a) needs to be finely adjusted according to the heat exchange effect of the plate heat exchanger (201a) to achieve higher-precision temperature control; the fourth temperature transmitter (202b) is responsible for monitoring the temperature of cooling water, but they are more focused on monitoring the temperature of the inlet and outlet of the plate heat exchanger (201a).

7. The water cooling system according to claim 6, characterized in that: The second regulating member (203) comprises a fifth temperature transmitter (203a) fixedly connected to the fourth pipeline (201c), a second water storage tank (203b) arranged on one side of the fifth temperature transmitter (203a), a second filter (203c) arranged on one side of an outlet of the second water storage tank (203b), a sixth temperature transmitter (203d) arranged on one side of an outlet of the second filter (203c), and the third pipeline (201b) and the fourth pipeline (201c) are connected near the fourth temperature The load (203e) is fixedly connected to one side of the sixth temperature transmitter (202b) and the sixth temperature transmitter (203d); the second water storage tank (203b), the second filter (203c) and the sixth temperature transmitter (203d) are all fixedly connected to the fourth pipeline (201c), thereby achieving a precise temperature control effect; the load (203e) is fixedly connected to one side of the sixth temperature transmitter (203d) on the fourth pipeline (201c), and the temperature fluctuation of the load (203e) can be precisely adjusted.

8. A water cooling control method, characterized in that: A water cooling system according to any one of claims 1 to 7, comprising the following steps: Firstly, in the primary cycle, a first circulation loop (101) is used to perform preliminary temperature adjustment according to temperature fluctuations; Secondly, through the primary circulation and then to the secondary circulation, the first regulating element (103) is used to dynamically and accurately regulate the flow rate according to the measured water temperature; Finally, fuzzy control is combined with PID control to generate fuzzy input values ​​according to the input data, and the dynamic adjustment values ​​of the PID parameters are obtained through fuzzy logic control. As the absolute difference between the target water temperature and the actual water temperature changes, the PID parameters are dynamically adjusted within a local range. Through the adjustment of the secondary cycle, the system can respond to temperature changes more accurately.

9. The water cooling control method according to claim 8, characterized in that: Calculate PID control output ,in is the proportionality coefficient, is the integration coefficient, is the differential coefficient, It's time. It is the temperature fluctuation value. When the temperature difference is large, increase the proportional coefficient and enhance the corresponding speed. When the temperature difference is small, optimize the integral coefficient and reduce the oscillation. When the temperature difference changes rapidly, the fluctuation amplitude is large in a short time. Adjust the differential coefficient to improve stability.

10. The water cooling control method according to claim 9, characterized in that: The water cooling system is continuously tested and intelligently controlled according to the adjusted PID parameters to ensure stable operation of the water cooling system within the optimal production range.

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