A constant temperature intelligent valve control system and its control method

Abstract

The present invention relates to the field of intelligent regulation technology, and particularly to a constant temperature intelligent valve control system and its control method. The method includes the following steps: receiving the DDC analog control signal in real time through the constant temperature intelligent valve and performing vibration-free judgment in the standby mode and valve adjustment control analysis to generate a valve position opening adjustment control mode and a valve flow adjustment control mode; monitoring the supply and return water temperatures of the constant temperature intelligent valve in real time and calculating the valve temperature difference to obtain the measured temperature difference of the intelligent valve; performing valve adjustment control logic response analysis on the constant temperature intelligent valve to generate a basic regulation mode and a constant regulation mode of the intelligent valve; obtaining the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve and performing basic regulation processing and constant regulation processing on the constant temperature intelligent valve to execute the corresponding intelligent valve regulation control work. The present invention can automatically adjust the control mode according to actual needs, and has high adaptability, accuracy and energy saving performance.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent regulation, and particularly to a constant-temperature intelligent valve control system and a control method thereof. Background Art

[0002] The intelligent valve temperature control system mainly relies on mechanical valves and temperature sensors, and performs temperature control through manual adjustment or based on a preset schedule. By combining temperature sensors, intelligent valves, and control algorithms, precise temperature regulation and adaptive adjustment of the system are achieved. Specifically, on the basis of the traditional temperature control system, an intelligent valve and a temperature sensor are used to work together. By real-time monitoring of temperature changes, intelligent analysis of the current system state and prediction of temperature change trends, the valve opening or opening time is automatically adjusted to keep the temperature stable within a preset range. At the same time, advanced control algorithms, such as fuzzy control, PID control, and neural networks, are used to ensure that the system can quickly respond to environmental changes and load changes, and accurately control the opening and closing of the valve, thereby improving the temperature control accuracy and reducing energy waste. However, most of the existing constant-temperature control systems use traditional thermal control valves and perform feedback regulation through a single temperature sensor, resulting in problems of response lag and large temperature fluctuations. When facing different working environment modes or external temperature fluctuations, they cannot adjust the control strategy in real time, resulting in inaccurate temperature regulation. Summary of the Invention

[0003] Based on this, it is necessary for the present invention to provide a constant-temperature intelligent valve control system and a control method thereof to solve at least one of the above technical problems.

[0004] To achieve the above object, a constant-temperature intelligent valve control method includes the following steps:

[0005] The electric actuator in the constant-temperature intelligent valve receives the corresponding DDC analog control signal of the distributed control system in real time, and performs a vibration-free judgment in the standby mode on the DDC analog control signal to obtain the intelligent valve standby mode state; based on the intelligent valve standby mode state, the received DDC analog control signal is analyzed for valve adjustment control to generate a valve position opening adjustment control mode and a valve flow adjustment control mode;

[0006] Based on the valve position adjustment opening control mode and the valve flow adjustment opening control mode, and after the DDC analog control signal operates for 30 minutes, the temperature sensor is used to monitor the supply and return water temperatures of the constant temperature intelligent valve in real time to obtain the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve. The measured return water temperature of the intelligent valve includes the measured return water temperature under the refrigeration condition and the heating condition; the valve temperature difference is calculated based on the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve to obtain the measured temperature difference of the intelligent valve; based on the DDC analog control signal under the dual-mode condition and combined with the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve, the valve adjustment control logic response analysis of the constant temperature intelligent valve is carried out to generate the basic control mode of the intelligent valve and the constant control mode of the intelligent valve. The basic control mode of the intelligent valve includes the position and temperature difference control mode, the flow and temperature difference control mode, the position and return water temperature control mode, the flow and return water temperature control mode, the energy control mode, and the pressure difference control mode. The constant control mode of the intelligent valve includes the constant temperature difference control mode and the constant return water temperature control mode;

[0007] Obtain the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve. Based on the basic control mode of the intelligent valve and combined with the set temperature difference of the intelligent valve, the set return water temperature of the intelligent valve, the measured temperature difference of the intelligent valve, and the measured return water temperature of the intelligent valve, the basic control process of the corresponding constant temperature intelligent valve is carried out to perform the corresponding intelligent valve position and temperature difference control, flow and temperature difference control, position and return water temperature control, flow and return water temperature control, energy control, and pressure difference control work;

[0008] Based on the constant control mode of the intelligent valve and combined with the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve, the constant control process of the corresponding constant temperature intelligent valve is carried out to perform the corresponding intelligent valve constant temperature difference control and constant return water temperature control work.

[0009] Furthermore, the present invention also provides a constant temperature intelligent valve control system for executing the constant temperature intelligent valve control method as described above. The constant temperature intelligent valve control system includes:

[0010] An intelligent valve adjustment opening control module for receiving the corresponding DDC analog control signal of the distributed control system in real time through the electric actuator in the constant temperature intelligent valve, and performing a standby mode anti-vibration judgment on the DDC analog control signal to obtain the intelligent valve standby mode state; based on the intelligent valve standby mode state, the valve adjustment control analysis is carried out on the DDC analog control signal received again, so as to generate the valve position opening adjustment control mode and the valve flow adjustment control mode;

[0011] The valve operation post-regulation control logic response module is used to adjust the opening control mode based on the valve position and the valve flow rate adjustment opening control mode, and use the temperature sensor to monitor the real-time supply and return water temperatures of the constant temperature intelligent valve after the DDC analog control signal has been running for 30 minutes, so as to obtain the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve. The measured return water temperature of the intelligent valve includes the measured return water temperature under the refrigeration condition and the heating condition; calculate the valve temperature difference based on the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve to obtain the measured temperature difference of the intelligent valve; perform valve regulation control logic response analysis on the constant temperature intelligent valve based on the DDC analog control signal under the dual-mode condition, combined with the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve, so as to generate the basic regulation mode of the intelligent valve and the constant regulation mode of the intelligent valve. The basic regulation mode of the intelligent valve includes the position and temperature difference regulation mode, the flow rate and temperature difference regulation mode, the position and return water temperature regulation mode, the flow rate and return water temperature regulation mode, the energy regulation mode, and the pressure difference regulation mode. The constant regulation mode of the intelligent valve includes the constant temperature difference regulation mode and the constant return water temperature regulation mode;

[0012] The intelligent valve basic regulation processing module is used to obtain the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve, and perform basic regulation processing on the corresponding constant temperature intelligent valve based on the basic regulation mode of the intelligent valve, combined with the set temperature difference of the intelligent valve, the set return water temperature of the intelligent valve, the measured temperature difference of the intelligent valve, and the measured return water temperature of the intelligent valve, so as to perform corresponding intelligent valve position and temperature difference regulation, flow rate and temperature difference regulation, position and return water temperature regulation, flow rate and return water temperature regulation, energy regulation, and pressure difference regulation control work;

[0013] The intelligent valve constant regulation processing module is used to perform constant regulation processing on the corresponding constant temperature intelligent valve based on the constant regulation mode of the intelligent valve, combined with the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve, so as to perform corresponding intelligent valve constant temperature difference regulation and constant return water temperature regulation control work.

[0014] Advantages of the present invention:

[0015] 1. Compared with the prior art, the beneficial effect of the constant-temperature intelligent valve control method proposed by the present invention is that the electric actuator in the constant-temperature intelligent valve receives the corresponding analog control signal of the distributed control system (DDC) in real time and judges the vibration-free standby mode for this signal. The core function of this process is to ensure that the valve will not perform frequent opening and closing operations due to small changes or interferences in the external environment during the standby state, thereby avoiding unnecessary mechanical wear or energy consumption waste. Through the vibration-free judgment, the mechanical vibration and impact of the valve can be effectively reduced, and the service life and stability of the constant-temperature intelligent valve can be improved. At the same time, by analyzing the valve adjustment control based on the DDC signal received again according to the standby mode state of the intelligent valve, the adjustment requirements of the valve can be accurately judged, and then an accurate valve position opening adjustment control mode and a valve flow adjustment control mode can be generated. This adjustment control strategy can not only optimize the response speed and accuracy of the heating or cooling system in the constant-temperature intelligent valve, but also ensure the minimum energy consumption of the valve under different working conditions through real-time monitoring and adjustment, and improve the energy efficiency of the entire heating or cooling system. Secondly, in the case of a dual-mode based on the valve position adjustment opening control mode and the valve flow adjustment opening control mode, and after the DDC analog control signal has been running for 30 minutes, the temperature sensor is used to monitor the supply and return water temperatures of the constant-temperature intelligent valve in real time, and the measured supply water temperature and return water temperature of the intelligent valve are obtained. Through real-time monitoring, the working state of the valve and the changes in the heat load can be accurately grasped. The measured return water temperature data of the intelligent valve also includes the return water temperature under the cooling and heating conditions, which can effectively reflect the cold and heat load requirements of the current working environment. This provides a real-time basis for the adjustment of the valve, making the control strategy of the valve more targeted and time-effective. On this basis, the measured temperature difference of the intelligent valve calculated according to the measured supply water temperature, return water temperature and valve temperature difference of the intelligent valve, and through the combined analysis of the DDC analog control signal and the intelligent valve temperature difference under the dual-mode conditions, multiple valve adjustment control modes are generated, including position and temperature difference control mode, flow and temperature difference control mode, position and return water temperature control mode, flow and return water temperature control mode, energy control mode and pressure difference control mode. These modes provide rich choices for the control of the valve, enabling the working mode of the valve to be flexibly adjusted according to the actual situation, and improving the flexibility and intelligent level of the constant-temperature intelligent valve. The basic control mode and the constant control mode of the intelligent valve (such as constant temperature difference control and constant return water temperature control) can ensure that the constant-temperature intelligent valve still operates stably in an environment with large temperature fluctuations, and further solve the problems of control response lag and large temperature fluctuations.Then, by obtaining the set temperature difference and the set return water temperature of the intelligent valve, and combining the basic regulation mode of the intelligent valve and the actual temperature difference and return water temperature data, precise valve regulation processing is performed on the constant temperature intelligent valve. This process can adjust the actual operating state of the valve according to different regulation modes of the valve (such as position and temperature difference regulation, flow and temperature difference regulation, position and return water temperature regulation, flow and return water temperature regulation, energy regulation, and pressure difference regulation, etc.), making the output of the constant temperature intelligent valve more accurate and stable. For example, the position and temperature difference regulation mode can adjust the valve opening according to the set temperature difference, thereby precisely controlling the heat exchange efficiency of the constant temperature intelligent valve; while the flow and temperature difference regulation mode can optimize the energy efficiency of the constant temperature intelligent valve and reduce unnecessary energy consumption by adjusting the relationship between flow and temperature difference. By combining the set temperature difference and return water temperature with the actual measurement data, it can respond to load changes in real time, making the valve regulation more refined, so as to improve the control accuracy and response speed of the entire heating / cooling system, and when facing different working environment modes or external temperature fluctuations, it can adopt the best regulation control strategy, thereby improving the accuracy of temperature regulation. Finally, through the constant regulation processing of the valve based on the constant regulation mode of the intelligent valve and combining the set temperature difference and return water temperature, it can maintain a constant temperature difference and return water temperature according to actual needs. The constant temperature difference regulation mode ensures that a constant temperature difference is maintained during long-term operation, thereby improving the stability of heat exchange and avoiding energy waste or system overload caused by excessive temperature fluctuations. The constant return water temperature regulation mode can precisely control the return water temperature, enabling the constant temperature intelligent valve to work stably. Whether under conditions of large load fluctuations or in different operating modes, the application of this constant regulation mode can significantly improve the stability and comfort of the entire intelligent valve system. Especially in scenarios where precise control of the return water temperature or temperature difference is required, it can maintain efficient heat energy utilization, reduce energy waste, and this constant regulation mode also makes the constant temperature intelligent valve more adaptable to environmental changes and can automatically adjust according to external temperature changes, not only improving energy efficiency but also increasing the overall lifespan of the constant temperature intelligent valve.

[0016] 2. The constant temperature intelligent valve control system proposed by the present invention is generally composed of an intelligent valve opening adjustment control module, a post-valve operation adjustment control logic response module, an intelligent valve basic regulation processing module, and an intelligent valve constant regulation processing module. It can implement any of the constant temperature intelligent valve control methods described in the present invention, and is used to realize the constant temperature intelligent valve control method through the operation between computer programs running on each module. The internal structure of the system cooperates with each other, which can greatly reduce repetitive work and manpower input, and can quickly and effectively provide a more accurate and efficient constant temperature intelligent valve control process, thereby simplifying the operation process of the constant temperature intelligent valve control system. Description of the Drawings

[0017] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings:

[0018] Figure 1 Schematic diagram of the step flow of the constant temperature intelligent valve control method of the present invention;

[0019] Figure 2 Schematic diagram of the opening control of the valve position opening adjustment control mode of the present invention. Detailed implementation manners

[0020] The technical method of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0021] To achieve the above object, please refer to Figures 1 to 2 , the present invention provides a constant temperature intelligent valve control method. In the embodiments of the present invention, please refer to Figure 1 shown, which is a schematic diagram of the step flow of the constant temperature intelligent valve control method of the present invention. In this example, the constant temperature intelligent valve control method includes the following steps:

[0022] S1: The electric actuator in the constant temperature intelligent valve receives the DDC analog control signal corresponding to the distributed control system in real time, and judges the DDC analog control signal for vibration avoidance in the standby mode to obtain the standby mode state of the intelligent valve; based on the standby mode state of the intelligent valve, analyze the DDC analog control signal received again for valve adjustment control, and generate a valve position opening adjustment control mode and a valve flow adjustment control mode;

[0023] In the embodiments of the present invention, in the control system of the constant temperature intelligent valve, the electric actuator and the distributed control system (DDC) interact in real time through analog control signals. In specific implementation, first, the electric actuator needs to be connected to the analog control signal in the DDC system and receive the control signal from the DDC in real time. After receiving the control signal, the electric actuator will analyze the signal. Especially in the standby mode, it is necessary to process the signal through a vibration-free judgment algorithm. The process of vibration-free judgment is mainly based on the analysis of the amplitude and frequency of the control signal. When the signal fluctuates within a specific range, it indicates that the signal is in the standby state. On this basis, the intelligent valve will record this state and enter the standby mode. Then, if a new DDC analog control signal enters, the system will adjust and control according to the current state of the valve (standby mode). The valve adjustment and control include two aspects: one is the position opening adjustment and control, and the other is the flow adjustment and control. Through logical judgment, corresponding control modes will be generated, including the opening and flow adjustment modes of the valve, so as to achieve precise control of the fluid flow, and finally generate the valve position opening adjustment control mode and the valve flow adjustment control mode.

[0024] S2: Based on the valve position adjustment opening control mode and the valve flow adjustment opening control mode, and after the DDC analog control signal runs for 30 minutes, use the temperature sensor to monitor the supply and return water temperatures of the constant temperature intelligent valve in real time to obtain the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve. The measured return water temperature of the intelligent valve includes the measured return water temperature under the refrigeration condition and the heating condition; calculate the valve temperature difference according to the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve to obtain the measured temperature difference of the intelligent valve; based on the DDC analog control signal under the dual-mode condition, and combined with the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve, conduct an analysis of the valve adjustment control logic response of the constant temperature intelligent valve to generate the basic control mode of the intelligent valve and the constant control mode of the intelligent valve. The basic control mode of the intelligent valve includes the position and temperature difference control mode, the flow and temperature difference control mode, the position and return water temperature control mode, the flow and return water temperature control mode, the energy control mode, and the pressure difference control mode. The constant control mode of the intelligent valve includes the constant temperature difference control mode and the constant return water temperature control mode;

[0025] In an embodiment of the present invention, after the valve adjustment control mode is generated, the valve temperature monitoring stage is entered. Specifically, based on the opening adjustment mode and the flow adjustment mode obtained from the previous regulation, first, under the action of the received DDC analog control signal, the constant temperature intelligent valve starts to operate. At this time, through real-time monitoring by the temperature sensor, the supply water temperature and the return water temperature of the intelligent valve are respectively obtained. The temperature sensor needs to be installed at the inlet and outlet positions of the valve to accurately record the temperature data of the supply water and the return water. Especially after the system operates for 30 minutes under the action of the DDC analog control signal, the actual supply water temperature (this data reflects the fluid temperature inside the valve) and the return water temperature (including the return water temperature in the cooling and heating modes) are read through the temperature sensor. These data will be used for further analysis to calculate the temperature difference of the valve. The temperature difference calculation formula is: the measured temperature difference of the intelligent valve = |supply water temperature - return water temperature|. Among them, in the cooling condition, the measured temperature difference of the intelligent valve = return water temperature - supply water temperature, and in the heating condition, the measured temperature difference of the intelligent valve = supply water temperature - return water temperature. This temperature difference value will be used to judge the effectiveness of the current adjustment mode under dual-mode control. By combining these temperature difference data, the control system will perform the valve adjustment control logic response analysis, so as to generate the basic regulation mode and the constant regulation mode of the intelligent valve suitable for the current working condition. The basic regulation mode includes the position and temperature difference regulation mode, the flow and temperature difference regulation mode, the position and return water temperature regulation mode, the flow and return water temperature regulation mode, the energy regulation mode, and the pressure difference regulation mode, etc. The constant regulation mode includes the constant temperature difference regulation mode and the constant return water temperature regulation mode. These modes can help the constant temperature intelligent valve system to accurately regulate the valve according to different requirements.

[0026] S3: Obtain the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve. Based on the basic regulation mode of the intelligent valve and in combination with the set temperature difference of the intelligent valve, the set return water temperature of the intelligent valve, the measured temperature difference of the intelligent valve, and the measured return water temperature of the intelligent valve, perform the basic regulation process of the valve on the corresponding constant temperature intelligent valve to execute the corresponding intelligent valve position and temperature difference regulation, flow and temperature difference regulation, position and return water temperature regulation, flow and return water temperature regulation, energy regulation, and pressure difference regulation control work;

[0027] In an embodiment of the present invention, the valve is actually regulated by based on the basic regulation mode of the intelligent valve. In this step, first, the temperature difference value (i.e., 0 - 40 °C) and the return water temperature value (-20 - 120 °C) set by the intelligent valve are obtained. These set values are used as target parameters to guide the subsequent valve regulation. According to the set temperature difference and return water temperature, combined with the actually measured temperature difference and return water temperature of the intelligent valve monitored in real time, the valve is basically regulated. In specific implementation, the regulation work is executed according to different regulation modes. For example, if the position and temperature difference regulation mode is selected, the position opening of the valve is adjusted based on the deviation between the current temperature difference and the set temperature difference to make it meet the desired temperature difference; if the flow rate and temperature difference regulation mode is selected, the flow rate adjustment is made according to the set and actually measured temperature differences to achieve the goal of a constant temperature difference. This regulation process is also applicable to other regulation modes such as flow rate and return water temperature regulation, position and return water temperature regulation, etc. Among them, in the flow rate and return water temperature regulation mode, the flow rate is controlled to keep the return water temperature stable; in the position and return water temperature regulation mode, by measuring the return water temperature, it can be judged whether the heat exchange effect reaches the expectation. If the return water temperature is too high, it means that the heat has not been completely transferred out, and the position of the valve or pump in the system needs to be adjusted to reduce heat loss and maintain system balance, so as to accurately control the temperature; the energy regulation mode focuses on adjusting the supply of heat energy or cold energy in the system to meet the load demand. In this mode, the operating states of various devices are adjusted according to the load change and the set target energy consumption to avoid excessive or insufficient energy supply; while the differential pressure regulation mode controls the flow rate by monitoring and adjusting the differential pressure in the pipe network to ensure the balanced supply of flow rate and heat. The core logic of each regulation mode is to compare the set parameters with the actually measured data in real time and timely adjust the position or flow rate of the valve, so as to keep the system running under high efficiency and precise control, and finally execute the corresponding intelligent valve position and temperature difference regulation, flow rate and temperature difference regulation, position and return water temperature regulation, flow rate and return water temperature regulation, energy regulation, and differential pressure regulation control work.

[0028] S4: Based on the constant regulation mode of the intelligent valve and combined with the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve, perform the valve constant regulation process on the corresponding constant temperature intelligent valve to execute the corresponding intelligent valve constant temperature difference regulation and constant return water temperature regulation control work.

[0029] In the embodiment of the present invention, after the execution of the basic control mode is completed, the execution of the constant control mode is then turned to. In this mode, the constant temperature intelligent valve will perform more stable temperature difference and return water temperature control. During specific operation, the intelligent valve adjusts the valve according to the set temperature difference and return water temperature values. In the constant temperature difference control mode, the system will maintain the opening or flow rate adjustment of the valve to keep a constant temperature difference of the valve, so as to ensure the stability and efficiency of heat exchange. If entering the constant return water temperature control mode, the valve will be adjusted according to the set return water temperature to keep the return water temperature within the set range and prevent the temperature from being too high or too low, which may affect the operation of the system. No matter which constant control mode it is, the system will monitor the difference between the actual data and the set target during the adjustment process and dynamically adjust the control parameters of the valve to ensure that the constant temperature control effect is always the same. This process needs to combine the data real-time monitored by the temperature sensor and use the feedback control algorithm to perform the specific valve adjustment, and finally execute the corresponding intelligent valve constant temperature difference control and constant return water temperature control work.

[0030] Further, the step of the electric actuator in the constant temperature intelligent valve receiving the corresponding DDC analog control signal of the distributed control system in real time and performing vibration-free judgment in the standby mode includes the following steps:

[0031] Performing simulated real-time response control on the constant temperature intelligent valve through the distributed control system DDC to generate the corresponding DDC analog control signal of the distributed control system;

[0032] In the embodiment of the present invention, by using the distributed control system (DDC) to perform simulated real-time response control on the constant temperature intelligent valve. At this time, the distributed control system generates the corresponding analog control signal and transmits this signal to the electric actuator of the intelligent valve through the controller. This analog control signal adjusts the opening of the valve in real time according to the parameters such as the real-time changing temperature and pressure. Specifically, the DDC monitors and adjusts the current system parameters to automatically adjust the response of the constant temperature intelligent valve to ensure that the valve can be accurately controlled according to the set target. This process uses high-precision sensors and control algorithms to ensure that the generated analog control signal has high real-time performance and accuracy, and finally generates the corresponding DDC analog control signal of the distributed control system through the response control.

[0033] Preferably, the electric actuator in the constant-temperature intelligent valve receives the DDC analog control signal corresponding to the distributed control system in real time, and compares and judges the DDC analog control signal according to the preset minimum analog signal standard and the no-analog-signal standard. If the DDC analog control signal meets the preset minimum analog signal standard, the corresponding DDC analog control signal is determined as the minimum analog control signal; if the DDC analog control signal meets the preset no-analog-signal standard, the corresponding DDC analog control signal is determined as the no-analog control signal; the constant-temperature intelligent valve corresponding to the minimum analog control signal or the no-analog control signal is controlled to respond in the standby mode to generate an intelligent valve standby mode response control instruction.

[0034] In the embodiment of the present invention, the electric actuator receives the analog control signal from the DDC control system and starts to process it. First, the electric actuator compares the received analog signal with the preset minimum analog signal standard (such as [0-10V], [2-10V]) and the no-analog-signal standard (such as [2-10V], [4-20mA]). If the intensity of the DDC analog control signal meets the preset minimum analog signal standard, the signal is regarded as the minimum analog control signal, and the constant-temperature intelligent valve is triggered to enter the standby mode. Second, the electric actuator also compares the DDC analog control signal with the no-analog-signal standard. If the DDC analog control signal meets the preset no-analog-signal standard and is in a no-signal state, the signal is determined as the no-analog control signal, and the intelligent valve is set to the standby mode. In this mode, the electric actuator adjusts the valve state to ensure that the valve enters the low-power standby state to prevent the ineffective operation from affecting the system. Finally, an intelligent valve standby mode response control instruction is generated in response to the minimum analog control signal or the no-analog control signal.

[0035] Preferably, if the DDC analog control signal neither meets the preset minimum analog signal standard nor meets the preset no-analog-signal standard, the signal vibration amplitude of the corresponding DDC analog control signal is statistically analyzed to obtain the DDC analog control signal vibration amplitude characteristic value.

[0036] In an embodiment of the present invention, when the DDC analog control signal neither meets the analog minimum signal standard nor the analog no-signal standard, statistical analysis of the vibration amplitude of the control signal will be performed. The vibration amplitude refers to the fluctuation intensity of the analog signal over a period of time, usually detected by a vibration sensor generated by the motion feedback signal of the electric actuator. By calculating the vibration amplitude of the analog signal, the stability and fluctuation characteristics of the signal can be judged. At this time, based on the data collected by the sensor, methods such as spectrum analysis and amplitude detection are used to extract the vibration amplitude characteristic values of the signal. These characteristic values will assist in subsequent evaluation and vibration-free judgment, and finally obtain the vibration amplitude characteristic values of the DDC analog control signal.

[0037] Preferably, obtain the mechanical characteristics corresponding to the electric actuator in the constant temperature intelligent valve and the system load, and perform vibration-free evaluation calculation on the vibration amplitude characteristic values of the DDC analog control signal based on the mechanical characteristics corresponding to the electric actuator and the system load to obtain the vibration-free efficiency judgment value of the intelligent valve standby mode;

[0038] In an embodiment of the present invention, through vibration-free evaluation calculation according to the mechanical characteristics of the electric actuator and the system load, the core of this process is to combine the mechanical performance parameters of the electric actuator (such as load torque, speed, inertia, etc.) with the actual system load condition to evaluate whether the vibration amplitude of the current control signal will cause unnecessary vibration. The acquisition of the load state is realized through sensor feedback, and the load changes monitored by the sensor will be input into the evaluation algorithm. The algorithm, according to different load conditions, that is evaluate the influence efficiency of different vibration amplitudes on the constant temperature intelligent valve system to avoid oscillation. The evaluation result is the "vibration-free efficiency judgment value of the intelligent valve standby mode". This value represents whether the valve can effectively avoid vibration in the standby mode under the current conditions, or whether the vibration amplitude will affect the long-term stability of the system. For example, give a 1% dead zone to avoid oscillation, and finally obtain the vibration-free efficiency judgment value of the intelligent valve standby mode.

[0039] Preferably, based on the vibration-free efficiency judgment value of the intelligent valve standby mode, perform vibration-free comparison judgment on the signal vibration amplitude corresponding to the DDC analog control signal. If the signal vibration amplitude corresponding to the DDC analog control signal is within the judgment interval of the vibration-free efficiency judgment value of the intelligent valve standby mode, perform standby mode response control on the corresponding constant temperature intelligent valve to generate an intelligent valve standby mode response control instruction; if the signal vibration amplitude corresponding to the DDC analog control signal is not within the judgment interval of the vibration-free efficiency judgment value of the intelligent valve standby mode, re-receive the DDC analog control signal corresponding to the distributed control system and continue iterative judgment;

[0040] In an embodiment of the present invention, by using the vibration-free efficiency judgment value obtained from previous quantization calculations to perform a vibration-free comparison and judgment on the signal vibration amplitude corresponding to the current DDC analog control signal, if the vibration amplitude of the current signal is within the allowable range of the vibration-free efficiency judgment value, it is considered that the current control signal will not generate excessive vibration at this vibration amplitude, so that the standby mode response of the intelligent valve can be normally maintained. At this time, a standby mode response control instruction is generated and applied to the constant temperature intelligent valve. If the vibration amplitude is not within the allowable range, a new analog control signal will be output by adjusting the DDC control system, and the vibration amplitude characteristics of the signal will be re-evaluated until the vibration-free condition is met.

[0041] Preferably, the standby mode response control instruction of the intelligent valve is applied to the constant temperature intelligent valve for state response control to obtain the standby mode state of the intelligent valve.

[0042] In an embodiment of the present invention, by transmitting the standby mode response control instruction of the intelligent valve generated previously to the constant temperature intelligent valve to start the electric actuator for corresponding state adjustment. Specifically, the electric actuator will adjust the opening, position and other control parameters of the valve according to the standby mode control instruction to ensure that the valve enters a low-power, vibration-free standby state. At this time, the state response control instruction of the constant temperature intelligent valve will ensure that the valve maintains a stable state, avoiding ineffective vibration or excessive adjustment, and ensuring the long-term stable operation of the constant temperature intelligent valve, and finally obtaining the standby mode state of the intelligent valve.

[0043] Furthermore, the valve adjustment control analysis of the DDC analog control signal received again based on the standby mode state of the intelligent valve includes the following steps:

[0044] By receiving the DDC analog control signal corresponding to the distributed control system again in the standby mode state of the intelligent valve, and using the electric actuator in the standby mode state of the intelligent valve to combine with the DDC analog control signal received again to adjust and control the opening of the constant temperature intelligent valve, a valve opening adjustment control mode is generated;

[0045] In an embodiment of the present invention, in the standby mode of the intelligent valve, first, an analog control signal from a distributed control system (DDC) is received. This signal represents the opening degree of the valve position that the system needs to adjust. The received analog control signal will be used as the input parameter of the electric actuator to adjust the valve position of the constant temperature intelligent valve. Specifically, the electric actuator precisely adjusts the valve opening degree of the constant temperature intelligent valve by executing the control signal. This process is achieved through the mechanical movement of the electric actuator, so that the opening degree of the valve changes according to the control signal, thereby ensuring that the flow regulation of the valve is consistent with the set target. In this process, the valve position adjustment control mode continuously adjusts through the electric actuator to ensure that the valve position highly coincides with the received analog control signal, ensuring that the constant temperature intelligent valve can respond in real time and adjust the opening degree in the system standby mode, and finally controlling to generate a corresponding valve position opening degree adjustment control mode (such as Figure 2 as shown).

[0046] Preferably, in the standby mode of the intelligent valve, the flow sensor corresponding to the constant temperature intelligent valve is used to measure the valve flow in real time to obtain the actual measured standard flow of the intelligent valve;

[0047] In an embodiment of the present invention, in the standby mode of the intelligent valve, the flow sensor equipped on the constant temperature intelligent valve starts to measure the actual flow of the valve in real time. In this process, first, the flow sensor collects the fluid flow data on both sides of the valve. The flow sensor generates a corresponding electrical signal according to the actual passing amount of the fluid and transmits this signal to the control system for analysis and processing. The data processing module of the sensor can accurately convert it into a flow standard value to determine whether the actual flow of the current valve meets the expected setting. The output signal of the flow sensor is fed back to the control system in real time. By comparing the difference between the current flow and the standard flow, it can be determined whether the valve is in the desired working state and provide a basis for flow regulation in subsequent steps, and finally obtain the actual measured standard flow of the intelligent valve.

[0048] Preferably, in the standby mode of the intelligent valve, the electric actuator is used and combined with the DDC analog control signal received again to control the valve flow regulation of the actual measured standard flow of the intelligent valve and generate a valve flow regulation control mode.

[0049] In an embodiment of the present invention, in the standby mode of the intelligent valve, the electric actuator of the intelligent valve uses the received analog control signal, combines with the real-time flow data fed back by the flow sensor, and precisely adjusts the flow of the constant-temperature intelligent valve. The electric actuator compares the real-time flow information provided by the flow sensor with the flow target set by the control system, calculates the valve position or flow rate that needs to be adjusted. If there is a deviation between the actual flow rate fed back by the flow sensor and the expected value, the electric actuator will automatically adjust the opening of the valve flow according to the feedback of the control system, and make the flow tend to the set value by changing the opening of the valve. This process ensures the accuracy of the valve flow adjustment, and maintains the flow stability through continuous adjustment actions in the standby mode. The feedback mechanism and the control strategy of the actuator in the system cooperate closely to form a closed-loop control, thus ensuring the response speed and control accuracy of the constant-temperature intelligent valve during operation, making the valve flow adjustment more efficient and stable, and finally controlling the generation of the valve flow adjustment control mode.

[0050] Further, the real-time monitoring of the supply and return water temperatures of the constant-temperature intelligent valve by using the temperature sensor after the DDC analog control signal has been running for 30 minutes based on the opening control mode for valve position adjustment and the opening control mode for valve flow adjustment includes the following steps:

[0051] Under the dual-mode conditions of the opening control mode for valve position adjustment and the opening control mode for valve flow adjustment, and after the DDC analog control signal has been running for 30 minutes, determine the water supply working mode of the constant-temperature intelligent valve to obtain the water supply working mode of the intelligent valve and the water return working mode of the intelligent valve;

[0052] In an embodiment of the present invention, under the dual-mode conditions of the opening control mode for valve position adjustment and the opening control mode for valve flow adjustment, first receive the DDC analog control signal, and after it has been running continuously for 30 minutes, ensure that the signal is stable and reflects the real-time state of the system. The received analog signal provides the basis for valve opening and flow adjustment control, enabling the actuator of the constant-temperature intelligent valve to precisely adjust the valve opening and flow according to the instructions, so as to achieve the stable operation of the constant-temperature intelligent valve within a given time. After the valve is adjusted to the set flow and opening state according to these signals, the control system determines whether the constant-temperature intelligent valve has entered the water supply working mode. By dynamically adjusting the valve and the flow, determine the working mode of the constant-temperature intelligent valve, including the water supply working mode and the water return working mode. During this process, by monitoring the analog signal and combining with the real-time state feedback of the constant-temperature intelligent valve, the working mode of the valve can be determined after 30 minutes, and then it can be judged whether the current valve is in the correct water supply or water return state, ensuring that the system is in the expected working environment, and finally obtaining the water supply working mode of the intelligent valve and the water return working mode of the intelligent valve.

[0053] Preferably, a temperature sensor is used to monitor the water supply temperature of the constant-temperature intelligent valve in real time during the water supply working mode of the intelligent valve to obtain the measured water supply temperature of the intelligent valve.

[0054] In the embodiment of the present invention, after the constant-temperature intelligent valve enters the water supply working mode, a temperature sensor is used to monitor the water temperature in the water supply pipeline in real time. The temperature sensor is directly installed in the water supply pipeline and can accurately measure the real-time temperature data of the water flow. The temperature sensor transmits the collected temperature signal to the control system for processing to ensure that the temperature situation of the valve water supply can be accurately reflected, and finally the measured water supply temperature of the intelligent valve is obtained.

[0055] Preferably, a temperature sensor is used to monitor the return water temperature of the constant-temperature intelligent valve in real time under different working conditions during the return water working mode of the intelligent valve to obtain the measured return water temperature of the intelligent valve, where the measured return water temperature of the intelligent valve includes the measured return water temperature under the refrigeration working condition and the heating working condition.

[0056] In the embodiment of the present invention, after the constant-temperature intelligent valve enters the return water working mode, it is necessary to monitor the water temperature in the return water pipeline in real time. The monitoring of the return water temperature is completed by a temperature sensor. The temperature sensor is installed at a key position in the return water pipeline and can collect the water temperature information under different working conditions respectively. Under the refrigeration working condition, the return water temperature sensor measures the actual temperature of the return water to ensure that the return water temperature meets the set value in the refrigeration mode in the subsequent process; under the heating working condition, the sensor measures the return water temperature and ensures that it meets the requirements of the heating mode, accurately distinguishing the temperature requirements under different working conditions, so as to realize efficient temperature control regulation, and finally the measured return water temperature of the intelligent valve is monitored in real time, where the measured return water temperature of the intelligent valve includes the measured return water temperature under the refrigeration working condition and the heating working condition.

[0057] Furthermore, the valve adjustment control logic response analysis of the constant-temperature intelligent valve based on the DDC analog control signal under the dual-mode condition and combined with the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve includes the following steps:

[0058] Based on the DDC analog control signal under the dual-mode condition, a linear regression impact evaluation analysis is performed on the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve to obtain the linear regression impact evaluation result of the control signal on the temperature difference and the return water temperature under the dual-mode condition;

[0059] In an embodiment of the present invention, by collecting the DDC (Direct Digital Control) analog control signal and the corresponding measured temperature difference and return water temperature data when the intelligent valve operates under dual-mode conditions, the DDC analog control signal is usually generated by the system controller according to the load change and other external environmental parameters. The measured temperature difference of the intelligent valve refers to the temperature difference between the fluids on both sides of the valve, and the return water temperature is the water flow temperature returned to the valve from the system loop. All data should be collected under stable conditions to ensure the effectiveness of the linear regression analysis results. After collecting the data, a linear regression method will be used to analyze the relationship between the DDC analog control signal and the temperature difference and return water temperature. The purpose of the linear regression analysis is to evaluate the influence degree of the change of the analog control signal on the temperature difference and return water temperature through a mathematical model. This process first requires inputting the collected DDC control signal and the corresponding temperature difference and return water temperature data into the regression analysis tool or algorithm, and performing regression calculations to obtain the linear regression equation of the control signal and the temperature difference and return water temperature. The regression result will provide a basis for the judgment in the subsequent steps to help evaluate whether the control signal has a significant impact on the system operation, and finally obtain the linear regression impact evaluation result of the control signal on the temperature difference and return water temperature under dual-mode conditions.

[0060] Preferably, judge the linear regression impact evaluation result of the control signal on the temperature difference and return water temperature under dual-mode conditions. If the linear regression impact evaluation result shows that the temperature difference and return water temperature are affected by the change of the DDC analog control signal under dual-mode conditions, then use the PID adjustment controller to generate the basic control logic instruction for the corresponding constant temperature intelligent valve; if the linear regression impact evaluation result shows that the temperature difference and return water temperature are not affected by the change of the DDC analog control signal under dual-mode conditions, then use the PID adjustment controller to generate the constant control logic instruction for the corresponding constant temperature intelligent valve;

[0061] In an embodiment of the present invention, after completing linear regression analysis, next, it is determined whether the DDC analog control signal has a significant impact on the temperature difference and the return water temperature according to the regression result. If the regression analysis result shows that the temperature difference and the return water temperature change with the change of the DDC analog control signal, it indicates that the control signal has a certain influence on the temperature regulation of the constant temperature intelligent valve. In this case, the control system will generate corresponding basic valve control logic instructions through a PID adjustment controller. Specifically, during implementation, the PID controller first calculates the contributions of various control parameters (such as proportional, integral, and differential terms) to the regulation of the temperature difference and the return water temperature based on the linear regression analysis result. On this basis, the PID controller adjusts the control signal output so that the constant temperature intelligent valve can more accurately adjust the valve opening or flow rate to reach the set value of the temperature difference or the return water temperature. If the regression result shows that the temperature difference and the return water temperature are not significantly affected by the DDC analog control signal, the PID controller will generate a constant control logic instruction, no longer relying on the fluctuation of the analog control signal, but maintaining the valve working in the set constant state, thereby stabilizing the system operation and finally generating the valve constant control logic instruction.

[0062] Preferably, the basic valve control logic instruction is applied to the constant temperature intelligent valve and the DDC analog control signal is received for the basic valve control logic response to generate an intelligent valve basic control mode, where the intelligent valve basic control mode includes a position and temperature difference control mode, a flow rate and temperature difference control mode, a position and return water temperature control mode, a flow rate and return water temperature control mode, an energy control mode, and a pressure difference control mode;

[0063] In an embodiment of the present invention, after the basic control logic instruction of the valve is generated in a previous response, the intelligent valve will perform corresponding adjustment operations according to this instruction. The basic control mode of the valve includes various control strategies, such as position and temperature difference control mode, flow rate and temperature difference control mode, position and return water temperature control mode, flow rate and return water temperature control mode, energy control mode, and pressure difference control mode. The selection of these modes depends on the control objectives of the valve and the analysis results of the control signals. In specific implementation, the PID controller selects the corresponding control mode according to the set target of the temperature difference or the return water temperature. For example, if the goal is to control the temperature difference stably and the change in the return water temperature is small, the position and temperature difference control mode is selected, where the temperature difference is adjusted by changing the opening degree of the valve position; if the goal is to ensure a constant return water temperature, the flow rate and return water temperature control mode is selected, and the flow rate is controlled to keep the return water temperature stable; the flow rate and temperature difference control mode is a way to adjust the operation according to the system flow rate and temperature difference. In this mode, the operation state of the equipment is adjusted according to the set temperature difference and flow rate to maintain the heat exchange efficiency and meet the load demand; the position and return water temperature control mode can judge whether the heat exchange effect reaches the expectation by measuring the return water temperature. If the return water temperature is too high, it means that the heat has not been fully transferred, and the position of the valve or pump in the system needs to be adjusted to reduce heat loss and maintain system balance, so as to accurately control the temperature; the energy control mode focuses on adjusting the supply of heat energy or cold energy in the system to meet the load demand. In this mode, the operation states of various equipment are adjusted according to the load change and the set target energy consumption to avoid excessive or insufficient energy supply; while the pressure difference control mode controls the flow rate by monitoring and adjusting the pressure difference in the pipe network, so as to ensure the balanced supply of flow rate and heat; the pressure difference control can keep the system running stably, prevent the flow rate from being too large or too small, and avoid damage to the system due to pressure imbalance. When executing the control instruction, the intelligent valve performs dynamic adjustment according to the real-time DDC analog control signal. The response of the valve will adopt different operation methods according to different control modes. At this time, the control system of the valve adjusts the state of the valve in real time through a feedback mechanism to ensure that the temperature difference or the return water temperature is always kept within the set range, and finally generates the corresponding basic control mode of the intelligent valve.

[0064] Preferably, the constant control logic instruction of the valve is applied to the constant temperature intelligent valve and the DDC analog control signal is received for the valve constant control logic response to generate the intelligent valve constant control mode, where the intelligent valve constant control mode includes a constant temperature difference control mode and a constant return water temperature control mode.

[0065] In an embodiment of the present invention, when it is previously analyzed that the DDC analog control signal has no significant effect on the changes in temperature difference and return water temperature, a valve constant regulation logic instruction is correspondingly generated and applied to the corresponding constant temperature intelligent valve. The purpose of this constant regulation logic is to keep the intelligent valve in a stable working state, independent of the fluctuations of external control signals. In this case, the constant regulation modes executed by the intelligent valve include a constant temperature difference regulation mode and a constant return water temperature regulation mode. In the constant temperature difference regulation mode, the valve is adjusted to a fixed opening or flow rate to keep the temperature difference in the system constant and ensure that the heat exchange efficiency is not affected by fluctuations. In the return water temperature regulation mode, the return water temperature is maintained at the target set value by controlling the flow rate or valve opening to avoid a reduction in system efficiency due to external temperature fluctuations. The implementation of this process depends on the adjustment function of the PID controller. The controller adjusts the working state of the valve according to the set temperature difference or return water temperature target, so that the valve remains stable within the target range for a long time, ensuring that the system can still achieve stable regulation under complex environmental conditions, and finally generating the intelligent valve constant regulation mode in response.

[0066] Further, the basic regulation process of the corresponding constant temperature intelligent valve based on the basic regulation mode of the intelligent valve and combined with the set temperature difference of the intelligent valve, the set return water temperature of the intelligent valve, the measured temperature difference of the intelligent valve, and the measured return water temperature of the intelligent valve includes the following steps:

[0067] Perform deviation sampling averaging operations on the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve to obtain the temperature difference deviation value of the intelligent valve and the return water temperature deviation value of the intelligent valve. The temperature difference deviation value of the intelligent valve includes a positive temperature difference deviation value and a negative temperature difference deviation value. The return water temperature deviation value of the intelligent valve includes the positive return water temperature deviation value and the negative return water temperature deviation value under the refrigeration condition and the heating condition.

[0068] In the embodiment of the present invention, through the average operation of deviation sampling on the measured temperature difference and the measured return water temperature of the intelligent valve, first, within a set time interval, multiple temperature difference and return water temperature data need to be collected. These data are monitored in real time by temperature sensors, and the real-time temperature values measured by the sensors are sent into the control system of the intelligent valve. For the temperature difference of the intelligent valve, the temperature difference deviation value will be calculated. Among them, the positive temperature difference deviation value refers to the situation where the actually measured temperature difference of the intelligent valve is higher than the set temperature difference, and the negative temperature difference deviation value refers to the situation where the actually measured temperature difference is lower than the set temperature difference. Similarly, for the return water temperature, the positive deviation value and the negative deviation value of the return water temperature respectively represent that the actually measured return water temperature is higher than the set return water temperature or lower than the set return water temperature. By sampling these data and performing the average operation, a more stable deviation value can be obtained to assist the judgment and execution of subsequent control. Finally, the intelligent valve temperature difference deviation value and the intelligent valve return water temperature deviation value are obtained. Among them, the intelligent valve temperature difference deviation value includes the positive temperature difference deviation value and the negative temperature difference deviation value, and the intelligent valve return water temperature deviation value includes the positive deviation value and the negative deviation value of the return water temperature under the refrigeration condition and the heating condition.

[0069] Preferably, when it is determined that the basic control mode of the intelligent valve is the position and temperature difference control mode, then based on the intelligent valve temperature difference deviation value, the set temperature difference of the intelligent valve and the actually measured temperature difference of the intelligent valve are compared and judged. If the actually measured temperature difference of the intelligent valve ≥ the set temperature difference of the intelligent valve + the negative temperature difference deviation value, then the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the opening; if the actually measured temperature difference of the intelligent valve < the set temperature difference of the intelligent valve + the positive temperature difference deviation value, then the corresponding constant temperature intelligent valve adjusts the opening according to the actually measured temperature difference control logic of the intelligent valve, is not controlled by the external DDC analog control signal, and iteratively loops and controls the execution according to this judgment result in the next time;

[0070] In the embodiment of the present invention, when it is determined that the basic control mode of the intelligent valve is the position and temperature difference control mode, based on the previously obtained intelligent valve temperature difference deviation value, the set temperature difference of the intelligent valve and the actually measured temperature difference of the intelligent valve are compared and judged. On this basis, if the actually measured temperature difference of the intelligent valve is greater than or equal to the set temperature difference plus the negative temperature difference deviation value, it means that the actual temperature difference of the valve is too large and corresponding adjustment is needed. At this time, the constant temperature intelligent valve receives the analog control signal from the DDC (Direct Digital Control) system to adjust the opening and perform the control task; on the contrary, if the actually measured temperature difference of the intelligent valve is less than the set temperature difference plus the positive temperature difference deviation value, the system will directly control the opening of the valve through the internal logic algorithm and no longer receive the external DDC analog control signal. At this time, the intelligent valve makes autonomous adjustment according to its own temperature difference deviation value, and the adjusted opening will be continuously iterated and looped until the actually measured temperature difference returns to the set range. The control strategy of this process ensures the accuracy and intelligence of temperature control. When not relying on external signals, the intelligent valve can achieve independent adaptive adjustment.

[0071] Preferably, when it is determined that the basic control mode of the intelligent valve is the flow rate and temperature difference control mode, the set temperature difference of the intelligent valve and the measured temperature difference of the intelligent valve are compared and judged based on the temperature difference deviation value of the intelligent valve. If the measured temperature difference of the intelligent valve ≥ the set temperature difference of the intelligent valve + the negative temperature difference deviation value, the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the flow rate; if the measured temperature difference of the intelligent valve < the set temperature difference of the intelligent valve + the positive temperature difference deviation value, the corresponding constant temperature intelligent valve adjusts the flow rate according to the measured temperature difference control logic of the intelligent valve, is not controlled by the external DDC analog control signal, and iteratively controls and executes according to this judgment result in the following time.

[0072] In the embodiment of the present invention, when it is determined that the basic control mode of the intelligent valve is the flow rate and temperature difference control mode, the implementation process is similar to the position and temperature difference control mode, but the control object changes from the valve position opening adjustment to the flow rate adjustment. In this mode, the intelligent valve first compares the set temperature difference of the intelligent valve and the measured temperature difference of the intelligent valve according to the previously calculated temperature difference deviation value. If the measured temperature difference is greater than or equal to the set temperature difference plus the negative temperature difference deviation value, the flow rate of the valve will be adjusted through the DDC analog control signal to ensure the coordination of the flow rate and the temperature difference; if the measured temperature difference is less than the set temperature difference plus the positive temperature difference deviation value, the intelligent valve no longer accepts the external DDC control signal, but directly adjusts the flow rate according to the temperature difference deviation. This adjustment method can effectively control the flow rate change in the refrigeration or heating system, ensure the dynamic matching of the temperature difference and the flow rate. During this process, the control system will also dynamically monitor the feedback signal of the system and adjust the flow rate in real time to avoid excessive fluctuations or unnecessary flow rate adjustments, and iteratively controls and executes according to this judgment result in the subsequent time.

[0073] Preferably, when it is determined that the basic control mode of the intelligent valve is the position and return water temperature control mode, and when the corresponding constant temperature intelligent valve is in the refrigeration condition, the set return water temperature of the intelligent valve and the measured return water temperature under the refrigeration condition are compared and judged based on the return water temperature deviation value of the intelligent valve under the refrigeration condition. If the measured return water temperature under the refrigeration condition ≥ the set return water temperature of the intelligent valve + the negative return water temperature deviation value under the refrigeration condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the opening; if the measured return water temperature under the refrigeration condition < the set return water temperature of the intelligent valve + the positive return water temperature deviation value under the refrigeration condition, the corresponding constant temperature intelligent valve performs the work of adjusting the opening according to the measured return water temperature control logic under the refrigeration condition, is not controlled by the external DDC analog control signal, and iteratively and circularly controls and executes according to this judgment result in the following time; and when the corresponding constant temperature intelligent valve is in the heating condition, the set return water temperature of the intelligent valve and the measured return water temperature under the heating condition are compared and judged based on the return water temperature deviation value of the intelligent valve under the heating condition. If the measured return water temperature under the heating condition ≤ the set return water temperature of the intelligent valve + the positive return water temperature deviation value under the heating condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the opening; if the measured return water temperature under the heating condition > the set return water temperature of the intelligent valve + the negative return water temperature deviation value under the heating condition, the corresponding constant temperature intelligent valve performs the work of adjusting the opening according to the measured return water temperature control logic under the heating condition, is not controlled by the external DDC analog control signal, and iteratively and circularly controls and executes according to this judgment result in the following time;

[0074] In the embodiment of the present invention, when it is determined that the basic control mode of the intelligent valve is the position and return water temperature control mode, the implementation process distinguishes between the cooling condition and the heating condition. Among them, in the cooling condition, first, obtain the return water temperature deviation value under the cooling condition, and judge whether it is necessary to adjust the valve opening by comparing the difference between the set return water temperature of the intelligent valve and the measured return water temperature. If the measured return water temperature is greater than or equal to the set return water temperature plus the negative return water temperature deviation value, adjust the valve opening by receiving the DDC analog control signal; if the measured return water temperature is less than the set return water temperature plus the positive return water temperature deviation value, the intelligent valve directly adjusts itself according to the deviation of the return water temperature, does not accept the external DDC signal, and adjusts the opening according to the set control logic to keep the return water temperature within the set range. In the heating condition, the process is similar. First, obtain the return water temperature deviation value under the heating condition, and judge according to the difference between the set return water temperature and the measured return water temperature. If the measured return water temperature is less than or equal to the set return water temperature plus the positive return water temperature deviation value, perform the opening control by receiving the DDC analog control signal; if the measured return water temperature is greater than the set return water temperature plus the negative return water temperature deviation value, the intelligent valve adjusts the opening according to the deviation of the return water temperature without relying on the external DDC signal. Each judgment and control in this process is based on real-time feedback data and temperature control logic to ensure that the return water temperature always remains within a reasonable range under different working conditions, ensure the stability of the heating or cooling effect, and iterate and loop the control execution according to this judgment result in the next time.

[0075] Preferably, when it is determined that the basic regulation mode of the intelligent valve is the flow rate and return water temperature regulation mode, and when the corresponding constant temperature intelligent valve is in the refrigeration condition, the set return water temperature of the intelligent valve and the measured return water temperature under the refrigeration condition are compared and judged based on the return water temperature deviation value of the intelligent valve under the refrigeration condition. If the measured return water temperature under the refrigeration condition ≥ the set return water temperature of the intelligent valve + the negative return water temperature deviation value under the refrigeration condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the flow rate; if the measured return water temperature under the refrigeration condition < the set return water temperature of the intelligent valve + the positive return water temperature deviation value under the refrigeration condition, the corresponding constant temperature intelligent valve executes the work of adjusting the flow rate according to the measured return water temperature control logic under the refrigeration condition, is not controlled by the external DDC analog control signal, and iteratively and circularly controls the execution according to this judgment result in the next period of time; and when the corresponding constant temperature intelligent valve is in the heating condition, the set return water temperature of the intelligent valve and the measured return water temperature under the heating condition are compared and judged based on the return water temperature deviation value of the intelligent valve under the heating condition. If the measured return water temperature under the heating condition ≤ the set return water temperature of the intelligent valve + the positive return water temperature deviation value under the heating condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the flow rate; if the measured return water temperature under the heating condition > the set return water temperature of the intelligent valve + the negative return water temperature deviation value under the heating condition, the corresponding constant temperature intelligent valve executes the work of adjusting the flow rate according to the measured return water temperature control logic under the heating condition, is not controlled by the external DDC analog control signal, and iteratively and circularly controls the execution according to this judgment result in the next period of time;

[0076] In an embodiment of the present invention, when it is determined that the basic control mode of the intelligent valve is "flow rate and return water temperature control mode", it is first necessary to determine whether the current working condition is refrigeration or heating. Assuming that the current is a refrigeration working condition, the set return water temperature of the intelligent valve and the measured return water temperature under the refrigeration working condition are compared and judged based on the return water temperature deviation value of the intelligent valve under the refrigeration working condition. If the measured return water temperature is greater than or equal to the set return water temperature plus the negative return water temperature deviation value, at this time, the constant temperature intelligent valve will receive the analog control signal from the DDC (Direct Digital Control) system to accurately adjust the flow rate of the valve to reach the set return water temperature; if the measured return water temperature is less than the set return water temperature plus the positive return water temperature deviation value, it will be used by the system to control the opening of the constant temperature intelligent valve, and without relying on the external DDC analog control signal, the constant temperature intelligent valve will automatically adjust the flow rate according to the internally set control logic, and this control will be continuously iteratively executed in the next control cycle until the temperature deviation is resolved. Similarly, if the current is a heating working condition, the system will compare and judge the set return water temperature of the intelligent valve and the measured return water temperature under the heating working condition based on the return water temperature deviation value of the intelligent valve under the heating working condition. If the measured return water temperature is less than or equal to the set return water temperature plus the positive return water temperature deviation value, the valve will receive the adjustment of the analog signal from the DDC to control the flow rate; if the measured return water temperature is greater than the set return water temperature plus the negative return water temperature deviation value, the constant temperature intelligent valve will rely on its own temperature control logic to execute the flow rate adjustment control, and this control will be iterated in the next period of time to ensure that the heating system can be accurately adjusted to the set return water temperature.

[0077] Preferably, when it is determined that the basic control mode of the intelligent valve is the energy control mode, the electric actuator adjusts the energy of the corresponding constant temperature intelligent valve according to the DDC analog control signal;

[0078] In an embodiment of the present invention, when it is determined that the basic control mode of the intelligent valve is switched to the "energy control mode", the core of the adjustment process lies in the monitoring and adjustment of energy. At this time, through the electric actuator, the constant temperature intelligent valve receives the analog control signal from the DDC system. According to this control signal, the intelligent valve performs adjustment operations to achieve the control of the energy flow rate of the valve. The system first calculates the required energy flow rate through a mathematical model based on parameters such as the current flow rate demand and heat load, and converts this demand into a corresponding analog control signal. After receiving the signal, the electric actuator adjusts the opening of the valve according to the real-time state and working requirements of the valve to ensure that the fluid energy flow rate meets the system demand, avoiding energy waste or unqualified temperature control caused by too high or too low flow rate adjustment, and finally performs the work of adjusting the energy of the valve.

[0079] Preferably, when it is determined that the basic control mode of the intelligent valve is the differential pressure control mode, the actual differential pressure between the inside and outside of the valve is measured in real time by the pressure sensor built in the constant temperature intelligent valve, and the deviation sampling average operation is also performed on the actual differential pressure between the inside and outside of the valve to obtain the positive deviation value of the differential pressure of the intelligent valve and the negative deviation value of the differential pressure of the intelligent valve; based on the positive deviation value of the differential pressure of the intelligent valve and the negative deviation value of the differential pressure of the intelligent valve, the actual differential pressure and the set differential pressure corresponding to the constant temperature intelligent valve are compared. If the actual differential pressure ≤ the set differential pressure + the negative deviation value of the differential pressure of the intelligent valve, the ethylene glycol flow rate and heat exchange amount of the constant temperature intelligent valve are obtained, and the signal correction calculation is performed on the DDC analog control signal based on the ethylene glycol flow rate and heat exchange amount of the constant temperature intelligent valve to obtain the ethylene glycol flow rate correction control signal; the ethylene glycol flow rate correction control signal is used to control the constant temperature intelligent valve to perform the work of adjusting the opening degree; if the actual differential pressure > the set differential pressure + the positive deviation value of the differential pressure of the intelligent valve, the corresponding constant temperature intelligent valve performs the work of adjusting the opening degree according to the actual differential pressure control logic, is not controlled by the external DDC analog control signal, and iteratively circulates and controls the execution according to this judgment result in the next time.

[0080] In the embodiment of the present invention, when it is determined that the control mode of the intelligent valve is the "differential pressure control mode", the pressure sensor built in the valve will monitor the differential pressure between the inside and outside of the valve in real time. In order to achieve precise control, the system will collect and analyze the differential pressure data, and perform deviation sampling and average operation to obtain the positive and negative deviation values of the differential pressure. By combining the positive and negative deviation values of the differential pressure, the actual differential pressure and the set differential pressure are compared for decision-making. If the actual differential pressure is less than or equal to the set differential pressure plus the negative deviation value of the differential pressure, the ethylene glycol flow rate and heat exchange amount corresponding to the current state of the constant temperature intelligent valve will be calculated, and based on these data, the DDC analog control signal will be corrected to adjust the ethylene glycol flow rate control signal. At this time, the electric actuator will respond to the corrected signal and precisely adjust the opening degree of the constant temperature intelligent valve to ensure that the differential pressure returns to the set range; if the actual differential pressure is greater than the set differential pressure plus the positive deviation value of the differential pressure, the constant temperature intelligent valve will adjust the opening degree according to the current actual differential pressure using the internal control logic, without relying on the external DDC analog control signal. In this case, the constant temperature intelligent valve automatically adjusts the opening degree according to the differential pressure control strategy to maintain the stability of the pressure difference in the system and ensure that this adjustment process can be continuously executed until the system reaches the required working state, which can effectively avoid energy waste or system efficiency decline caused by out-of-control differential pressure.

[0081] Further, the deviation sampling average operation on the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve includes the following steps:

[0082] The measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve are sampled in time series at a sampling time of 2 s each time to obtain the measured temperature difference sampling value and the measured return water temperature sampling value within each sampling time;

[0083] In an embodiment of the present invention, the measured temperature difference and the measured return water temperature of the intelligent valve are sampled in time series by using a sampling period register. Specifically, during implementation, the sampling interval is set to 2 seconds, and real-time data acquisition is performed throughout the control system. During this sampling process, the temperature difference sensor and the return water temperature sensor are installed at the water inlet and the water return port of the valve to measure the temperature difference value and the return water temperature value respectively. Every 2 seconds, the sensors sample and obtain the values of the temperature difference and the return water temperature, and transmit the collected data to the central processing unit through the data acquisition module. After receiving the values of each sampling, the processing unit stores them in time series to form a data set with a length of N (N is the number of samplings), which includes the temperature difference sampling value and the return water temperature sampling value at each moment, and finally obtains the measured temperature difference sampling value and the measured return water temperature sampling value within each sampling time.

[0084] Preferably, according to the operation time interval of 30 s, the measured temperature difference sampling values and the measured return water temperature sampling values within 15 sampling times are subjected to deviation sampling average operation, and the deviation value is adjusted at intervals of every 3 min to obtain the intelligent valve temperature difference deviation value and the intelligent valve return water temperature deviation value, where the intelligent valve temperature difference deviation value includes a positive temperature difference deviation value and a negative temperature difference deviation value, and the intelligent valve return water temperature deviation value includes the positive return water temperature deviation value and the negative return water temperature deviation value under the refrigeration condition and the heating condition.

[0085] In an embodiment of the present invention, by performing deviation sampling average operation on the measured temperature difference sampling values and the return water temperature sampling values obtained from previous samplings, first, the operation time interval is defined as 30 seconds, and 15 data points are extracted from the original sampling data obtained previously according to this time interval, and the average values of the temperature difference value and the return water temperature value within this time period are calculated. Specifically, assuming that the nth data point in the sampling data set is T n (temperature difference value) and R n (return water temperature), then at After obtaining the average value of 15 samplings and determining the corresponding sampling average value as the temperature difference deviation value and the return water temperature deviation value under the current state, enter the deviation adjustment of the next stage. According to the set adjustment period, adjust the temperature difference deviation and the return water temperature deviation value every 3 minutes to ensure that the valve can maintain the optimal temperature control effect under different working conditions (such as refrigeration condition and heating condition). The specific adjustment process includes adjusting the PID control algorithm according to the deviation between the average temperature difference value and the return water temperature value and the target value to maintain the valve control accuracy and reduce the temperature control error. For the temperature difference deviation, if the deviation is positive, it indicates that the actual temperature difference is large, and the system will increase the valve opening; conversely, if the deviation is negative, the system will decrease the valve opening. Similarly, for the return water temperature deviation, if the return water temperature deviation is large, the system will adjust the cooling or heating intensity according to the actual demand to ensure that the return water temperature is stable within the preset range, and finally obtain the intelligent valve temperature difference deviation value and the intelligent valve return water temperature deviation value.

[0086] Furthermore, the signal correction calculation of the DDC analog control signal based on the ethylene glycol flow rate and the heat exchange amount of the constant temperature intelligent valve is calculated through the ethylene glycol flow rate and heat exchange amount correction calculation formula. Among them, the specific ethylene glycol flow rate and heat exchange amount correction calculation formula is as follows:

[0087]

[0088] In the formula, is the ethylene glycol flow rate correction control signal, m EG is the DDC analog control signal, t is the time range parameter, τ is the integral time variable parameter, Q(τ) is the ethylene glycol heat exchange amount of the constant temperature intelligent valve at time τ, Q nom is the calibrated heat exchange amount of the constant temperature intelligent valve system, α1 is the heat exchange amount signal deviation correction influence factor, T in is the ethylene glycol inflow fluid flow rate, T out is the ethylene glycol outflow fluid flow rate, T sct is the ethylene glycol target flow rate of the constant temperature intelligent valve, T nom is the calibrated flow rate of the constant temperature intelligent valve system, α2 is the flow rate signal deviation correction influence factor, and η is the correction coefficient of the ethylene glycol flow rate correction control signal.

[0089] The present invention obtains a correction calculation formula for the heat exchange amount of ethylene glycol flow through the use of a specific mathematical model and verification, which is used to perform signal correction calculation on the DDC analog control signal. By correcting the flow signal, this correction calculation formula for the heat exchange amount of ethylene glycol flow can effectively eliminate the deviations caused by different factors (such as heat exchange amount and temperature difference). By integrating the deviation between the actual heat exchange amount and the calibrated heat exchange amount, the actual adjustment value of the ethylene glycol flow can be made closer to the target flow required by the system, thereby improving the adjustment accuracy of the control system. Through integral compensation and temperature difference correction, this formula compares the actual operating conditions of the system with the design parameters. When a deviation occurs in the system, it can dynamically adjust the flow control signal according to the real-time changes in the heat exchange amount and flow. This correction mechanism enables the intelligent valve to better adapt to load changes, pipeline characteristic changes, or other system instabilities, thus ensuring the stable operation of the system. In actual operation, the heat exchange effect is affected by various factors, such as flow changes and temperature changes. By introducing the proportional relationship between the heat exchange amount and its calibrated value, the formula accumulatively corrects the deviation of the system, thereby compensating for the errors caused by unstable heat exchange and maintaining the stability of flow control. By precisely adjusting the ethylene glycol flow, the heat transfer efficiency can be optimized, avoiding excessive or insufficient flow control, and further reducing energy consumption, which is particularly important in systems with high energy efficiency requirements, such as temperature control systems and cold and heat exchange systems. In this way, the control signal can be corrected according to the actual pressure difference and flow, and the opening of the valve can be dynamically adjusted. This not only reduces the dependence on external analog control signals but also enables the valve to make autonomous adjustments, increasing the flexibility of the system. In addition, through the introduction of a correction coefficient, the control signal is further fine-tuned to better cope with external environmental changes and ensure the stability of the system. During long-term operation, this fine-tuning mechanism can effectively avoid the performance degradation of the system caused by external factor fluctuations and improve the long-term reliability of the system. In summary, this formula fully considers the ethylene glycol flow correction control signal DDC analog control signal Q, time range parameter t, integral time variable parameter τ, heat exchange amount of ethylene glycol of the constant temperature intelligent valve Q(τ) at time τ, calibrated heat exchange amount Q of the constant temperature intelligent valve system nom , heat exchange signal deviation correction influence factor α1, ethylene glycol inflow fluid flow rate T in , ethylene glycol outflow fluid flow rate T out , target flow rate T of ethylene glycol of the constant temperature intelligent valve sct , calibrated flow rate T of the constant temperature intelligent valve system nom , flow signal deviation correction influence factor α2, correction coefficient η of the ethylene glycol flow correction control signal, according to the ethylene glycol flow correction control signal and the mutual correlation relationships among the above parameters constitute a functional relationship This formula can achieve the signal correction calculation process for the DDC analog control signal. At the same time, by introducing the correction coefficient η of the ethylene glycol flow correction control signal, it can be adjusted according to the error situation during the calculation process, thereby improving the accuracy and applicability of the ethylene glycol flow heat transfer correction calculation formula.

[0090] Further, the constant regulation process of the corresponding constant temperature intelligent valve based on the intelligent valve constant regulation mode and combined with the intelligent valve set temperature difference and the intelligent valve set return water temperature includes the following steps:

[0091] When it is determined that the intelligent valve constant regulation mode is the constant temperature difference mode, the corresponding constant temperature intelligent valve is not controlled by the DDC analog control signal at this time. By measuring the supply and return water temperatures of the constant temperature intelligent valve in the current mode in real time, the supply and return water temperature difference in the current mode is calculated according to the supply and return water temperatures in the current mode and compared with the intelligent valve set temperature difference. According to the comparison result, the work of adjusting the opening degree is performed to keep the supply and return water temperature difference corresponding to the constant temperature intelligent valve constant;

[0092] In the embodiment of the present invention, when the constant temperature intelligent valve enters the constant regulation mode and is selected as the constant temperature difference mode, the connection with the DDC analog control signal is disconnected to ensure that the intelligent valve is not affected by the external control signal and is completely regulated based on the internal logic. At this time, the constant temperature intelligent valve needs to perform temperature difference control based on the actual supply and return water temperatures in the current mode to monitor the supply and return water temperatures of the valve in real time. The data is collected and fed back through temperature sensors to form a temperature difference. By calculating the current supply and return water temperature difference and comparing it with the set target temperature difference, when the actual temperature difference deviates from the set temperature difference, the control system adjusts the opening degree of the intelligent valve according to the difference. This adjustment process is automatically completed without manual intervention and will dynamically adjust the valve opening degree in real time according to the change of the temperature difference to ensure that the supply and return water temperature difference is constant within the preset range, thereby achieving precise temperature control. The specific execution process of the valve adjustment includes calculating the deviation value based on the real-time collected temperature data and then adjusting the opening and closing degree of the valve through the control algorithm to keep the supply and return water temperature difference corresponding to the constant temperature intelligent valve constant.

[0093] Preferably, when the constant regulation mode of the intelligent valve is determined to be the constant return water temperature regulation mode, the corresponding constant temperature intelligent valve is not controlled by the DDC analog control signal at this time. By measuring the return water temperature of the constant temperature intelligent valve in the current mode in real time, the measured return water temperature in the constant return water mode is obtained, where the measured return water temperature includes the measured return water temperature in the cooling condition and the heating condition; the same deviation sampling average operation is performed on the measured return water temperature in the constant return water mode to obtain the positive deviation value and the negative deviation value of the return water temperature in the constant return water mode; when the corresponding constant temperature intelligent valve is in the cooling condition, the set return water temperature of the intelligent valve and the measured return water temperature in the cooling condition are compared based on the positive deviation value and the negative deviation value of the return water temperature in the constant return water mode. If the set return water temperature of the intelligent valve + the negative deviation value of the return water temperature in the constant return water mode < the measured return water temperature in the cooling condition < the set return water temperature of the intelligent valve + the positive deviation value of the return water temperature in the constant return water mode, the corresponding constant temperature intelligent valve performs the work of adjusting the flow according to the control logic of the measured return water temperature in the cooling condition, and iteratively controls and executes according to this judgment result in the next time period; when the corresponding constant temperature intelligent valve is in the heating condition, the set return water temperature of the intelligent valve and the measured return water temperature in the heating condition are also compared based on the positive deviation value and the negative deviation value of the return water temperature in the constant return water mode. If the set return water temperature of the intelligent valve + the positive deviation value of the return water temperature in the constant return water mode < the measured return water temperature in the heating condition < the set return water temperature of the intelligent valve + the negative deviation value of the return water temperature in the constant return water mode, the corresponding constant temperature intelligent valve performs the work of adjusting the flow according to the control logic of the measured return water temperature in the heating condition, and iteratively controls and executes according to this judgment result in the next time period until the return water temperature reaches within the set value deviation range.

[0094] In an embodiment of the present invention, when the constant temperature intelligent valve enters the constant regulation mode and is selected as the constant return water temperature regulation mode, the connection with the DDC analog control signal is also disconnected. At this time, the intelligent valve adjusts according to the actual return water temperature. The return water temperature sensor monitors the return water temperature in real time and feeds back the measured value to the control system of the constant temperature intelligent valve. After the system collects the return water temperature data, it first performs an average operation of deviation sampling to obtain the positive deviation value and negative deviation value of the return water temperature. For the refrigeration condition, based on the set return water temperature and the deviation value, it is judged whether the current return water temperature is too high or too low. If the sum of the set return water temperature and the negative deviation value is greater than the actual return water temperature, it indicates that the current return water temperature is too low, and the valve reduces the flow according to the return water temperature control logic; conversely, if the sum of the set return water temperature and the positive deviation value is less than the actual return water temperature, it indicates that the current return water temperature is too high, and the valve increases the flow according to the return water temperature control logic. In the heating condition, the processing method is similar to that in the refrigeration condition. The measured return water temperature is compared with the set return water temperature. If the sum of the set return water temperature and the positive deviation value is greater than the actual return water temperature, the valve will adjust and open the flow according to the return water temperature control logic to increase the return water temperature until the temperature reaches within the deviation range of the set value; conversely, if the sum of the set return water temperature and the negative deviation value is less than the actual return water temperature, the valve will reduce the flow to lower the return water temperature until the temperature reaches within the deviation range of the set value. This control process is completed based on accurate temperature deviation calculation and is continuously iteratively adjusted in each cycle to ensure that the return water temperature is always maintained within the deviation range of the set target temperature, ensuring the stable operation of the system. Specifically, during the execution of the constant temperature intelligent valve, by integrating the temperature sensor and the control algorithm, after each collection of the return water temperature data, the deviation is calculated in real time, and the valve opening or flow is continuously adjusted through real-time feedback. This process is not only based on the instantaneous temperature difference but also through periodic feedback and adjustment to ensure that the return water temperature fluctuates within the target range, thereby maintaining a constant return water temperature. The accuracy and continuity of the control logic ensure the long-term stability of the constant temperature intelligent valve and improve the energy use efficiency.

[0095] Furthermore, the present invention also provides a constant temperature intelligent valve control system for implementing the above-mentioned constant temperature intelligent valve control method. The constant temperature intelligent valve control system includes:

[0096] An intelligent valve opening adjustment control module, which is used to receive the corresponding DDC analog control signal of the distributed control system in real time through the electric actuator in the constant temperature intelligent valve, and perform a vibration-free judgment in the standby mode on the DDC analog control signal to obtain the intelligent valve standby mode state; based on the intelligent valve standby mode state, perform valve adjustment control analysis on the DDC analog control signal received again, so as to generate a valve position opening adjustment control mode and a valve flow adjustment control mode;

[0097] The valve operation post-regulation control logic response module is used to adjust the opening control mode based on the valve position and the valve flow rate adjustment opening control mode, and after the DDC analog control signal operates for 30 minutes, use a temperature sensor to monitor the supply and return water temperatures of the constant temperature intelligent valve in real time to obtain the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve, where the measured return water temperature of the intelligent valve includes the measured return water temperature under the refrigeration condition and the heating condition; calculate the valve temperature difference based on the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve to obtain the measured temperature difference of the intelligent valve; based on the DDC analog control signal under the dual-mode condition, combined with the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve, perform valve adjustment control logic response analysis on the constant temperature intelligent valve to generate the basic control mode of the intelligent valve and the constant control mode of the intelligent valve, where the basic control mode of the intelligent valve includes the position and temperature difference control mode, the flow rate and temperature difference control mode, the position and return water temperature control mode, the flow rate and return water temperature control mode, the energy control mode, and the pressure difference control mode, and the constant control mode of the intelligent valve includes the constant temperature difference control mode and the constant return water temperature control mode;

[0098] The intelligent valve basic regulation processing module is used to obtain the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve, and based on the basic control mode of the intelligent valve, combined with the set temperature difference of the intelligent valve, the set return water temperature of the intelligent valve, the measured temperature difference of the intelligent valve, and the measured return water temperature of the intelligent valve, perform basic regulation processing on the corresponding constant temperature intelligent valve to execute the corresponding intelligent valve position and temperature difference regulation, flow rate and temperature difference regulation, position and return water temperature regulation, flow rate and return water temperature regulation, energy regulation, and pressure difference regulation control work;

[0099] The intelligent valve constant regulation processing module is used to perform constant regulation processing on the corresponding constant temperature intelligent valve based on the constant control mode of the intelligent valve, combined with the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve, to execute the corresponding intelligent valve constant temperature difference regulation and constant return water temperature regulation control work.

[0100] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A method for controlling a constant-temperature intelligent valve, characterized in that, Including the following steps: Receiving in real time the DDC analog control signal corresponding to the distributed control system through the electric actuator in the constant temperature intelligent valve, and performing vibration-free judgment in the standby mode on the DDC analog control signal to obtain the standby mode state of the intelligent valve; Based on the standby mode state of the intelligent valve, performing valve adjustment control analysis on the DDC analog control signal received again, and generating a valve position opening adjustment control mode and a valve flow adjustment control mode; Based on the valve position adjustment opening control mode and the valve flow rate adjustment opening control mode, and after the DDC analog control signal has been running for 30 minutes, the temperature sensor is used to monitor the supply and return water temperatures of the constant temperature intelligent valve in real time to obtain the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve. The measured return water temperature of the intelligent valve includes the measured return water temperature under the refrigeration condition and the heating condition; the valve temperature difference is calculated based on the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve to obtain the measured temperature difference of the intelligent valve; based on the DDC analog control signal under the dual-mode condition and combined with the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve, an analysis of the valve adjustment control logic response of the constant temperature intelligent valve is carried out to generate the basic control mode of the intelligent valve and the constant control mode of the intelligent valve. The basic control mode of the intelligent valve includes the position and temperature difference control mode, the flow rate and temperature difference control mode, the position and return water temperature control mode, the flow rate and return water temperature control mode, the energy control mode, and the pressure difference control mode. The constant control mode of the intelligent valve includes the constant temperature difference control mode and the constant return water temperature control mode; among them, when the basic control mode of the intelligent valve is determined to be the pressure difference control mode, the measured pressure difference between the inside and outside of the valve is measured in real time through the pressure sensor built in the constant temperature intelligent valve, and the measured pressure difference between the inside and outside of the valve is also subjected to deviation sampling average operation to obtain the positive pressure difference value of the intelligent valve pressure difference and the negative pressure difference value of the intelligent valve pressure difference; based on the positive pressure difference value of the intelligent valve pressure difference and the negative pressure difference value of the intelligent valve pressure difference, the measured pressure difference and the set pressure difference corresponding to the constant temperature intelligent valve are compared. If the measured pressure difference is less than the set pressure difference + the negative pressure difference value of the intelligent valve pressure difference, the ethylene glycol flow rate and the heat exchange amount of the constant temperature intelligent valve are obtained, and based on the ethylene glycol flow rate and the heat exchange amount of the constant temperature intelligent valve, a signal correction calculation is carried out on the DDC analog control signal to obtain the ethylene glycol flow rate correction control signal; the ethylene glycol flow rate correction control signal is used to respond to the constant temperature intelligent valve to perform the work of adjusting the opening; if the measured pressure difference is greater than the set pressure difference + the positive pressure difference value of the intelligent valve pressure difference, the corresponding constant temperature intelligent valve controls the work of adjusting the opening according to the measured pressure difference control logic, is not controlled by the external DDC analog control signal, and iteratively controls and executes according to this judgment result in the next time; among them, the signal correction calculation of the DDC analog control signal based on the ethylene glycol flow rate and the heat exchange amount of the constant temperature intelligent valve is calculated through the ethylene glycol flow rate and heat exchange amount correction calculation formula. The specific formula of the ethylene glycol flow rate and heat exchange amount correction calculation formula is: ； Wherein, is the ethylene glycol flow rate correction control signal, is the DDC analog control signal, is the time range parameter, is the integral time variable parameter, is at time the heat exchange amount of ethylene glycol of the constant temperature intelligent valve, is the calibrated heat exchange amount of the constant temperature intelligent valve system, is the influence factor for correcting the heat exchange amount signal deviation, is the flow rate of the ethylene glycol inflow fluid, is the flow rate of the ethylene glycol outflow fluid, is the target flow rate of ethylene glycol of the constant temperature intelligent valve, is the calibrated flow rate of the constant temperature intelligent valve system, is the influence factor for correcting the flow rate signal deviation, is the correction coefficient of the ethylene glycol flow rate correction control signal; Obtaining the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve, and based on the basic control mode of the intelligent valve, combining the set temperature difference of the intelligent valve, the set return water temperature of the intelligent valve, the measured temperature difference of the intelligent valve, and the measured return water temperature of the intelligent valve to perform basic valve control processing on the corresponding constant temperature intelligent valve, so as to execute corresponding intelligent valve position and temperature difference control, flow and temperature difference control, position and return water temperature control, flow and return water temperature control, energy control, and pressure difference control work; Based on the constant control mode of the intelligent valve, combining the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve to perform constant valve control processing on the corresponding constant temperature intelligent valve, so as to execute corresponding intelligent valve constant temperature difference control and constant return water temperature control work.

2. The constant temperature intelligent valve control method according to claim 1, wherein The step of receiving in real time the DDC analog control signal corresponding to the distributed control system through the electric actuator in the constant temperature intelligent valve, and performing vibration-free judgment in the standby mode on the DDC analog control signal includes the following steps: Performing analog real-time response control on the constant temperature intelligent valve through the DDC of the distributed control system to generate the DDC analog control signal corresponding to the distributed control system; Receiving in real time the DDC analog control signal corresponding to the distributed control system through the electric actuator in the constant temperature intelligent valve, and comparing and judging the DDC analog control signal according to the preset minimum analog signal standard and the no-analog signal standard. If the DDC analog control signal meets the preset minimum analog signal standard, the corresponding DDC analog control signal is determined as the minimum analog control signal; if the DDC analog control signal meets the preset no-analog signal standard, the corresponding DDC analog control signal is determined as the no-analog control signal; performing standby mode response control on the constant temperature intelligent valve corresponding to the minimum analog control signal or the no-analog control signal to generate a standby mode response control instruction for the intelligent valve; If the DDC analog control signal neither meets the preset minimum analog signal standard nor meets the preset no-analog signal standard, performing signal vibration amplitude statistical analysis on the corresponding DDC analog control signal to obtain the vibration amplitude characteristic value of the DDC analog control signal; Obtaining the mechanical characteristics and system load corresponding to the electric actuator in the constant temperature intelligent valve, and performing vibration-free evaluation calculation on the vibration amplitude characteristic value of the DDC analog control signal based on the mechanical characteristics and system load corresponding to the electric actuator to obtain the vibration-free efficiency judgment value of the standby mode of the intelligent valve; Based on the vibration-free efficiency judgment value in the standby mode of the intelligent valve, the vibration amplitude of the signal corresponding to the DDC analog control signal is compared and judged for vibration-free. If the vibration amplitude of the signal corresponding to the DDC analog control signal is within the judgment interval of the vibration-free efficiency judgment value in the standby mode of the intelligent valve, the standby mode response control is performed on the corresponding constant-temperature intelligent valve to generate an intelligent valve standby mode response control instruction; if the vibration amplitude of the signal corresponding to the DDC analog control signal is not within the judgment interval of the vibration-free efficiency judgment value in the standby mode of the intelligent valve, the DDC analog control signal corresponding to the distributed control system is received again, and the iterative judgment continues; The intelligent valve standby mode response control instruction is applied to the constant-temperature intelligent valve for status response control to obtain the intelligent valve standby mode status.

3. The constant temperature intelligent valve control method according to claim 1, characterized in that The valve adjustment control analysis of the DDC analog control signal received again based on the intelligent valve standby mode status includes the following steps: By receiving again the DDC analog control signal corresponding to the distributed control system in the intelligent valve standby mode status, and using the electric actuator in the intelligent valve standby mode status to combine with the DDC analog control signal received again to adjust the opening degree of the valve position of the constant-temperature intelligent valve, a valve position opening degree adjustment control mode is generated; The flow sensor corresponding to the constant-temperature intelligent valve in the intelligent valve standby mode status is used to measure the real-time valve flow of the constant-temperature intelligent valve to obtain the actual measured standard flow of the intelligent valve; The electric actuator in the intelligent valve standby mode status is used to combine with the DDC analog control signal received again to adjust the valve flow of the actual measured standard flow of the intelligent valve to generate a valve flow adjustment control mode.

4. The constant temperature intelligent valve control method according to claim 1, characterized in that The real-time monitoring of the supply and return water temperatures of the constant-temperature intelligent valve using the temperature sensor after the DDC analog control signal has run for 30 minutes based on the valve position adjustment opening degree control mode and the valve flow adjustment opening degree control mode includes the following steps: Based on the dual-mode conditions of the valve position adjustment opening degree control mode and the valve flow adjustment opening degree control mode, and after the DDC analog control signal has run for 30 minutes, the water supply working mode of the constant-temperature intelligent valve is determined to obtain the intelligent valve water supply working mode and the intelligent valve return water working mode; The temperature sensor is used to monitor the supply water temperature of the constant-temperature intelligent valve in the intelligent valve water supply working mode in real time to obtain the actually measured supply water temperature of the intelligent valve; The temperature sensor is used to monitor the return water temperature of the constant-temperature intelligent valve in different working conditions in the intelligent valve return water working mode in real time to obtain the actually measured return water temperature of the intelligent valve, where the actually measured return water temperature of the intelligent valve includes the actually measured return water temperature in the refrigeration working condition and the heating working condition.

5. The constant temperature intelligent valve control method according to claim 1, characterized in that, The valve adjustment control logic response analysis of the constant-temperature intelligent valve based on the DDC analog control signal under the dual-mode conditions and in combination with the actually measured temperature difference of the intelligent valve and the actually measured return water temperature of the intelligent valve includes the following steps: Based on the DDC analog control signal under dual-mode conditions, an evaluation and analysis of the linear regression impact on the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve is carried out to obtain the evaluation result of the linear regression impact of the control signal on the temperature difference and the return water temperature under dual-mode conditions; Judge the evaluation result of the linear regression impact of the control signal on the temperature difference and the return water temperature under dual-mode conditions. If the evaluation result of the linear regression impact is that the temperature difference and the return water temperature are affected by the change of the DDC analog control signal under dual-mode conditions, then use the PID adjustment controller to generate the basic valve control logic instruction for the corresponding constant temperature intelligent valve; if the evaluation result of the linear regression impact is that the temperature difference and the return water temperature are not affected by the change of the DDC analog control signal under dual-mode conditions, then use the PID adjustment controller to generate the constant valve control logic instruction for the corresponding constant temperature intelligent valve; Apply the basic valve control logic instruction to the constant temperature intelligent valve and receive the DDC analog control signal to perform the basic valve control logic response to generate the basic intelligent valve control mode, where the basic intelligent valve control mode includes the position and temperature difference control mode, the flow and temperature difference control mode, the position and return water temperature control mode, the flow and return water temperature control mode, the energy control mode, and the pressure difference control mode; Apply the constant valve control logic instruction to the constant temperature intelligent valve and receive the DDC analog control signal to perform the constant valve control logic response to generate the constant intelligent valve control mode, where the constant intelligent valve control mode includes the constant temperature difference control mode and the constant return water temperature control mode.

6. The constant temperature intelligent valve control method according to claim 1, characterized in that, The basic valve control process for the corresponding constant temperature intelligent valve based on the basic intelligent valve control mode combined with the set temperature difference of the intelligent valve, the set return water temperature of the intelligent valve, the measured temperature difference of the intelligent valve, and the measured return water temperature of the intelligent valve includes the following steps: Perform deviation sampling average operation on the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve to obtain the temperature difference deviation value of the intelligent valve and the return water temperature deviation value of the intelligent valve, where the temperature difference deviation value of the intelligent valve includes the positive temperature difference deviation value and the negative temperature difference deviation value, and the return water temperature deviation value of the intelligent valve includes the positive return water temperature deviation value and the negative return water temperature deviation value under the refrigeration condition and the heating condition; When it is determined that the basic control mode of the intelligent valve is the position and temperature difference control mode, the set temperature difference of the intelligent valve and the measured temperature difference of the intelligent valve are compared and judged based on the temperature difference deviation value of the intelligent valve. If the measured temperature difference of the intelligent valve is less than the set temperature difference of the intelligent valve + the negative temperature difference deviation value, the corresponding constant temperature intelligent valve receives the DDC analog control signal and performs the work of controlling the opening; if the measured temperature difference of the intelligent valve is greater than the set temperature difference of the intelligent valve + the positive temperature difference deviation value, the corresponding constant temperature intelligent valve executes the work of adjusting the opening according to the measured temperature difference control logic of the intelligent valve, is not controlled by the external DDC analog control signal, and iteratively controls and executes according to this judgment result in the following time; When it is determined that the basic control mode of the intelligent valve is the flow rate and temperature difference control mode, the set temperature difference of the intelligent valve and the measured temperature difference of the intelligent valve are compared and judged based on the temperature difference deviation value of the intelligent valve. If the measured temperature difference of the intelligent valve is less than the set temperature difference of the intelligent valve + the negative temperature difference deviation value, the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the flow rate; if the measured temperature difference of the intelligent valve is greater than the set temperature difference of the intelligent valve + the positive temperature difference deviation value, the corresponding constant temperature intelligent valve adjusts the flow rate according to the measured temperature difference control logic of the intelligent valve, is not controlled by the external DDC analog control signal, and iteratively controls and executes according to this judgment result in the next period of time; When the basic control mode of the intelligent valve is determined to be the position and return water temperature control mode, and when the corresponding constant temperature intelligent valve is in the refrigeration condition, the set return water temperature of the intelligent valve and the measured return water temperature under the refrigeration condition are compared and judged based on the return water temperature deviation value of the intelligent valve under the refrigeration condition. If the measured return water temperature under the refrigeration condition is less than the set return water temperature of the intelligent valve + the negative return water temperature deviation value under the refrigeration condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the opening; if the measured return water temperature under the refrigeration condition is greater than the set return water temperature of the intelligent valve + the positive return water temperature deviation value under the refrigeration condition, the corresponding constant temperature intelligent valve performs the work of adjusting the opening according to the measured return water temperature control logic under the refrigeration condition, is not controlled by the external DDC analog control signal, and iteratively and circularly controls the execution according to this judgment result in the following time; when the corresponding constant temperature intelligent valve is in the heating condition, the set return water temperature of the intelligent valve and the measured return water temperature under the heating condition are compared and judged based on the return water temperature deviation value of the intelligent valve under the heating condition. If the measured return water temperature under the heating condition is greater than the set return water temperature of the intelligent valve + the positive return water temperature deviation value under the heating condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the opening; if the measured return water temperature under the heating condition is less than the set return water temperature of the intelligent valve + the negative return water temperature deviation value under the heating condition, the corresponding constant temperature intelligent valve performs the work of adjusting the opening according to the measured return water temperature control logic under the heating condition, is not controlled by the external DDC analog control signal, and iteratively and circularly controls the execution according to this judgment result in the following time; When it is determined that the basic control mode of the intelligent valve is the flow rate and return water temperature control mode, and when the corresponding constant temperature intelligent valve is in the refrigeration condition, the set return water temperature of the intelligent valve and the measured return water temperature under the refrigeration condition are compared and judged based on the return water temperature deviation value of the intelligent valve under the refrigeration condition. If the measured return water temperature under the refrigeration condition is less than the set return water temperature of the intelligent valve plus the negative return water temperature deviation value under the refrigeration condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the flow rate; if the measured return water temperature under the refrigeration condition is greater than the set return water temperature of the intelligent valve plus the positive return water temperature deviation value under the refrigeration condition, the corresponding constant temperature intelligent valve adjusts the flow rate according to the measured return water temperature control logic under the refrigeration condition, is not controlled by the external DDC analog control signal, and iteratively controls and executes according to this judgment result in the following time; when the corresponding constant temperature intelligent valve is in the heating condition, the set return water temperature of the intelligent valve and the measured return water temperature under the heating condition are compared and judged based on the return water temperature deviation value of the intelligent valve under the heating condition. If the measured return water temperature under the heating condition is greater than the set return water temperature of the intelligent valve plus the positive return water temperature deviation value under the heating condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to perform the work of controlling the flow rate; if the measured return water temperature under the heating condition is less than the set return water temperature of the intelligent valve plus the negative return water temperature deviation value under the heating condition, the corresponding constant temperature intelligent valve adjusts the flow rate according to the measured return water temperature control logic under the heating condition, is not controlled by the external DDC analog control signal, and iteratively controls and executes according to this judgment result in the following time; When it is determined that the basic intelligent valve control mode is the energy control mode, the electric actuator adjusts the valve energy of the corresponding constant temperature intelligent valve according to the DDC analog control signal.

7. The constant temperature intelligent valve control method according to claim 6, characterized in that The deviation sampling average operation on the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve includes the following steps: Perform sequential sampling processing on the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve at a sampling time of 2s each time to obtain the measured temperature difference sampling value and the measured return water temperature sampling value within each sampling time; Perform deviation sampling averaging operations on the measured temperature difference sampling values and the measured return water temperature sampling values within 15 sampling times according to the operation time interval of 30 s, and set the adjustment of the deviation value at intervals of every 3 min to obtain the intelligent valve temperature difference deviation value and the intelligent valve return water temperature deviation value, where the intelligent valve temperature difference deviation value includes a positive temperature difference deviation value and a negative temperature difference deviation value, and the intelligent valve return water temperature deviation value includes a positive return water temperature deviation value and a negative return water temperature deviation value under the refrigeration condition and the heating condition.

8. The constant temperature intelligent valve control method according to claim 1, characterized in that The valve constant regulation process for the corresponding constant temperature intelligent valve based on the intelligent valve constant regulation mode and combined with the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve includes the following steps: When it is determined that the intelligent valve constant regulation mode is the constant temperature difference mode, the corresponding constant temperature intelligent valve is not controlled by the DDC analog control signal at this time. By measuring the supply and return water temperatures of the constant temperature intelligent valve in the current mode in real time, calculate the supply and return water temperature difference in the current mode and compare it with the set temperature difference of the intelligent valve according to the supply and return water temperatures in the current mode, and perform the work of adjusting the opening according to the comparison result to keep the supply and return water temperature difference corresponding to the constant temperature intelligent valve constant; When it is determined that the constant regulation mode of the intelligent valve is the constant return water temperature regulation mode, the corresponding constant temperature intelligent valve is not controlled by the DDC analog control signal at this time. By measuring the return water temperature of the constant temperature intelligent valve in the current mode in real time, the measured return water temperature in the constant return water mode can be obtained, where the measured return water temperature includes the measured return water temperature under the refrigeration condition and the heating condition; the same deviation sampling average operation is performed on the measured return water temperature in the constant return water mode to obtain the positive deviation value and negative deviation value of the return water temperature in the constant return water mode; when the corresponding constant temperature intelligent valve is in the refrigeration condition, the set return water temperature of the intelligent valve and the measured return water temperature under the refrigeration condition are compared based on the positive deviation value and negative deviation value of the return water temperature in the constant return water mode. If the set return water temperature of the intelligent valve + the negative deviation value of the return water temperature in the constant return water mode Measured return water temperature under refrigeration condition When the set return water temperature of the intelligent valve + the positive deviation value of the return water temperature in the constant return water mode, the corresponding constant temperature intelligent valve performs the work of regulating the flow according to the control logic of the measured return water temperature under the refrigeration condition, and iteratively controls and executes according to this judgment result in the next period of time; when the corresponding constant temperature intelligent valve is in the heating condition, the set return water temperature of the intelligent valve and the measured return water temperature under the heating condition are also compared based on the positive deviation value and negative deviation value of the return water temperature in the constant return water mode. If the set return water temperature of the intelligent valve + the positive deviation value of the return water temperature in the constant return water mode Measured return water temperature under refrigeration condition When the set return water temperature of the intelligent valve + the negative deviation value of the return water temperature in the constant return water mode, the corresponding constant temperature intelligent valve performs the work of regulating the flow according to the control logic of the measured return water temperature under the heating condition, and iteratively controls and executes according to this judgment result in the next period of time until the return water temperature reaches within the set value deviation range.

9. A constant temperature intelligent valve control system, characterized in that, For implementing the constant temperature intelligent valve control method as described in Claim 1, this constant temperature intelligent valve control system includes: An intelligent valve opening adjustment control module, which is used to receive the corresponding DDC analog control signal of the distributed control system in real time through the electric actuator in the constant temperature intelligent valve, and perform anti-vibration judgment on the DDC analog control signal in the standby mode to obtain the intelligent valve standby mode state; perform valve adjustment control analysis on the DDC analog control signal received again based on the intelligent valve standby mode state, so as to generate a valve position opening adjustment control mode and a valve flow adjustment control mode; A valve operation post-adjustment control logic response module, which is used to perform real-time monitoring of the supply and return water temperatures of the constant temperature intelligent valve by using a temperature sensor after the DDC analog control signal has been running for 30 min based on the valve position adjustment opening control mode and the valve flow adjustment opening control mode to obtain the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve, where the measured return water temperature of the intelligent valve includes the measured return water temperature under the refrigeration condition and the heating condition; calculate the valve temperature difference according to the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve to obtain the measured temperature difference of the intelligent valve; perform valve adjustment control logic response analysis on the constant temperature intelligent valve based on the DDC analog control signal under the dual-mode condition and combined with the measured temperature difference of the intelligent valve and the measured return water temperature of the intelligent valve to generate an intelligent valve basic regulation mode and an intelligent valve constant regulation mode, where the intelligent valve basic regulation mode includes a position and temperature difference regulation mode, a flow and temperature difference regulation mode, a position and return water temperature regulation mode, a flow and return water temperature regulation mode, an energy regulation mode, and a pressure difference regulation mode, and the intelligent valve constant regulation mode includes a constant temperature difference regulation mode and a constant return water temperature regulation mode; The intelligent valve basic regulation processing module is used to obtain the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve, and based on the intelligent valve basic regulation mode, combined with the set temperature difference of the intelligent valve, the set return water temperature of the intelligent valve, the measured temperature difference of the intelligent valve, and the measured return water temperature of the intelligent valve, perform basic valve regulation processing on the corresponding constant temperature intelligent valve to execute corresponding intelligent valve position and temperature difference regulation, flow and temperature difference regulation, position and return water temperature regulation, flow and return water temperature regulation, energy regulation, and pressure difference regulation control work; The intelligent valve constant regulation processing module is used to perform valve constant regulation processing on the corresponding constant temperature intelligent valve based on the intelligent valve constant regulation mode and combined with the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve, so as to execute corresponding intelligent valve constant temperature difference regulation and constant return water temperature regulation control work.

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