Constant-temperature intelligent valve control system and control method thereof

Abstract

The invention relates to the technical field of intelligent regulation and control, in particular to a constant-temperature intelligent valve control system and a control method thereof. The method comprises the following steps that a DDC analog quantity control signal is received in real time through a constant-temperature intelligent valve, standby mode vibration-free judgment and valve adjustment control analysis are conducted, and a valve position opening degree adjustment control mode and a valve flow adjustment control mode are generated; performing supply and return water temperature real-time monitoring and valve temperature difference calculation on the constant-temperature intelligent valve to obtain the actually measured temperature difference of the intelligent valve; performing valve regulation control logic response analysis on the constant-temperature intelligent valve to generate an intelligent valve basic regulation mode and an intelligent valve constant regulation mode; and the set temperature difference of the intelligent valve and the set return water temperature of the intelligent valve are obtained, and basic valve regulation and control processing and constant valve regulation and control processing are conducted on the constant-temperature intelligent valve, so that corresponding intelligent valve regulation and control work is executed. According to the invention, the control mode can be automatically adjusted according to actual requirements, and the method has high adaptability, accuracy and energy-saving performance.

Description

Technical Field

[0001] The present invention relates to the field of intelligent control technology, and in particular 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 controls the temperature through manual adjustment or based on a preset schedule. By combining temperature sensors, intelligent valves and control algorithms, precise temperature control and adaptive adjustment of the system are achieved. Specifically, on the basis of the traditional temperature control system, intelligent valves and temperature sensors are used to work together, and by real-time monitoring of temperature changes, intelligent analysis of the current system status and prediction of temperature change trends, the valve opening or opening time is automatically adjusted to keep the temperature stable within the 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 respond quickly according 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, which are feedback-adjusted through a single temperature sensor. There are problems such as response lag and large temperature fluctuations, which make it impossible to adjust the control strategy in real time when facing different working environment modes or external temperature fluctuations, 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 thermostatic intelligent valve control method comprises the following steps:

[0005] The DDC analog control signal corresponding to the distributed control system is received in real time through the electric actuator in the thermostatic intelligent valve, and the standby mode vibration-free judgment is performed 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, the valve adjustment control analysis is performed on the DDC analog control signal received again to generate the valve position opening adjustment control mode and the valve flow adjustment control mode;

[0006] Based on the valve position adjustment opening control mode and the valve flow adjustment opening control mode, the temperature sensor is used to monitor the supply and return water temperatures of the thermostatic intelligent valve in real time after the DDC analog control signal runs 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, wherein the measured return water temperature of the intelligent valve includes the measured return water temperature under the cooling condition and the measured return water temperature under the heating condition; the valve temperature difference is calculated 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, the valve adjustment control logic response analysis of the thermostatic intelligent valve is performed to generate the basic control mode of the intelligent valve and the constant control mode of the intelligent valve, wherein 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, and 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 smart valve and the set return water temperature of the smart valve, and perform basic valve control processing on the corresponding constant temperature smart valve based on the basic control mode of the smart valve and in combination with the set temperature difference of the smart valve and the set return water temperature of the smart valve, the measured temperature difference of the smart valve and the measured return water temperature of the smart valve, so as to perform the corresponding smart 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 control;

[0008] Based on the intelligent valve constant control mode and combined with the intelligent valve set temperature difference and the intelligent valve set return water temperature, the corresponding constant temperature intelligent valve is subjected to valve constant control processing to execute the corresponding intelligent valve constant temperature difference control and constant return water temperature control control work.

[0009] Furthermore, the present invention also provides a thermostatic intelligent valve control system for executing the thermostatic intelligent valve control method as described above, the thermostatic intelligent valve control system comprising:

[0010] The intelligent valve adjustment opening control module is used to receive the DDC analog control signal corresponding to the distributed control system in real time through the electric actuator in the thermostatic intelligent valve, and perform standby mode vibration-free 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 performed on the DDC analog control signal received again, thereby generating a valve position opening adjustment control mode and a 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 adjustment opening control mode, and use the temperature sensor to monitor the supply and return water temperature of the thermostatic intelligent valve in real time after the DDC analog control signal runs 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, wherein the measured return water temperature of the intelligent valve includes the measured return water temperature under the cooling condition and the measured return water temperature of the intelligent valve under the heating condition; the valve temperature difference is calculated according to the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve, and the measured temperature difference of the intelligent valve is obtained; based on the The DDC analog control signal under dual-mode conditions is combined with the actual temperature difference of the intelligent valve and the actual return water temperature of the intelligent valve to perform valve regulation 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, wherein 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, and the constant control mode of the intelligent valve includes the constant temperature difference control mode and the constant return water temperature control mode;

[0012] The basic control processing module of the intelligent valve 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 valve control processing on the corresponding constant temperature intelligent valve based on the basic control mode of the intelligent valve and in combination with the set temperature difference of the intelligent valve and 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 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 control work;

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

[0014] Beneficial effects of the present invention:

[0015] 1. The thermostatic intelligent valve control method proposed in the present invention, compared with the prior art, has the beneficial effect of using the electric actuator in the thermostatic intelligent valve to receive the analog control signal corresponding to the distributed control system (DDC) in real time, and perform standby mode vibration-free judgment on the signal. The core function of this process is to ensure that the valve will not undergo frequent switching operations due to slight changes or interference in the external environment in the standby state, thereby avoiding unnecessary mechanical wear or energy waste. The vibration-free judgment can effectively reduce the mechanical vibration and impact of the valve, and improve the service life and stability of the thermostatic intelligent valve. At the same time, by performing valve adjustment control analysis on the DDC signal received again based on the standby mode state of the intelligent valve, the adjustment demand of the valve can be accurately judged, thereby generating accurate valve position opening adjustment control mode and valve flow adjustment control mode. This adjustment control strategy can not only optimize the response speed and accuracy of the heating or cooling system in the thermostatic intelligent valve, but also ensure that the energy consumption of the valve under different working conditions is minimized through real-time monitoring and adjustment, thereby improving the energy efficiency of the entire heating or cooling system. Secondly, through the dual-mode conditions of valve position adjustment opening control mode and 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 actual supply water temperature and return water temperature of the intelligent valve are obtained. Through real-time monitoring, the working status of the valve and the changes in heat load can be accurately grasped. The actual return water temperature data of the intelligent valve also includes the return water temperature under cooling and heating conditions, which can effectively reflect the cold and hot load requirements of the current working environment. This provides a real-time basis for the adjustment of the valve, making the valve control strategy more targeted and timely. On this basis, the measured temperature difference of the intelligent valve is calculated according to the measured supply water temperature, return water temperature and valve temperature difference of the intelligent valve, and a variety of valve regulation control modes are generated through the combined analysis of the DDC analog control signal and the intelligent valve temperature difference under dual-mode conditions, 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 valve regulation, so that the working mode of the valve can be flexibly adjusted according to actual conditions, thereby improving the flexibility and intelligence level of the constant temperature intelligent valve. The basic control mode and constant control mode (such as constant temperature difference control and constant return water temperature control) of the intelligent valve can ensure that the constant temperature intelligent valve can still maintain stable operation in an environment with large temperature fluctuations, further solving the problems of control response lag and large temperature fluctuations.Then, by obtaining the set temperature difference and set return water temperature of the smart valve, and combining the basic control mode of the smart valve and the actual temperature difference and return water temperature data, the constant temperature smart valve is precisely controlled. This process can adjust the actual operation state of the valve according to different control modes of the valve (such as 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, etc.), so that the output of the constant temperature smart valve is more accurate and stable. For example, the position and temperature difference control mode can adjust the valve opening according to the set temperature difference, so as to accurately control the heat exchange efficiency of the constant temperature smart valve; while the flow and temperature difference control mode can optimize the energy efficiency of the constant temperature smart 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 adjustment 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 adjustment control strategy, so as to improve the accuracy of temperature regulation. Finally, by performing constant control processing of the valve based on the constant control mode of the intelligent valve and combining the set temperature difference and return water temperature, it is possible to maintain a constant temperature difference and return water temperature according to actual needs. The constant temperature difference control 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 control mode can accurately control the return water temperature, so that the constant temperature intelligent valve can work stably. Whether under conditions of large load fluctuations or in different operating modes, the application of this constant control mode can significantly improve the stability and comfort of the entire intelligent valve system, especially in scenarios where precise control of return water temperature or temperature difference is required, it can maintain efficient thermal energy utilization and reduce energy waste. The constant control mode also makes the constant temperature intelligent valve more adaptable to environmental changes and can automatically adjust according to changes in external temperature, which not only improves energy efficiency, but also improves the overall life of the constant temperature intelligent valve.

[0016] 2. The constant temperature intelligent valve control system proposed in the present invention is generally composed of an intelligent valve opening adjustment control module, a valve operation adjustment control logic response module, an intelligent valve basic regulation and processing module, and an intelligent valve constant regulation and processing module. It can realize any constant temperature intelligent valve control method described in the present invention, and is used to combine the operations between computer programs running on each module to realize the constant temperature intelligent valve control method. The internal structures of the system cooperate with each other, which can greatly reduce repetitive work and manpower investment, and can quickly and effectively provide a more accurate and efficient constant temperature intelligent valve control process, thereby simplifying the operating procedures of the constant temperature intelligent valve control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments thereof made with reference to the following drawings:

[0018] Figure 1 It is a schematic diagram of the steps of the thermostatic intelligent valve control method of the present invention;

[0019] Figure 2 It is a schematic diagram of the opening control of the valve position opening adjustment control mode of the present invention. DETAILED DESCRIPTION

[0020] The technical method of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by technicians in this field without creative work are within the scope of protection of the present invention.

[0021] To achieve this, please refer to Figure 1 to Figure 2 The present invention provides a thermostatic intelligent valve control method. In the embodiment of the present invention, please refer to Figure 1 FIG. 1 is a flow chart of the steps of the thermostatic intelligent valve control method of the present invention. In this example, the thermostatic intelligent valve control method includes the following steps:

[0022] S1: The DDC analog control signal corresponding to the distributed control system is received in real time through the electric actuator in the thermostatic intelligent valve, and the DDC analog control signal is subjected to standby mode vibration-free judgment to obtain the standby mode state of the intelligent valve; based on the standby mode state of the intelligent valve, the valve adjustment control analysis is performed on the DDC analog control signal received again to generate the valve position opening adjustment control mode and the valve flow adjustment control mode;

[0023] In an embodiment of the present invention, in the control system of the thermostatic intelligent valve, the electric actuator and the distributed control system (DDC) interact in real time through analog control signals. In specific implementation, it is first necessary to connect the electric actuator 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. In particular, in the standby mode, the signal needs to be processed by the vibration-free judgment algorithm. The vibration-free judgment process is mainly based on the analysis of the amplitude and frequency of the control signal. When the signal fluctuates within a specific range, it means that the signal is in the standby state. On this basis, the intelligent valve will record the 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 control includes two aspects: one is the position opening adjustment control, and the other is the flow adjustment control. Through logical judgment, the corresponding control mode will be generated, including the valve opening and flow adjustment mode, 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, the temperature sensor is used to monitor the supply and return water temperatures of the thermostatic intelligent valve in real time after the DDC analog control signal runs 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, wherein the measured return water temperature of the intelligent valve includes the measured return water temperature under the cooling condition and the measured return water temperature under the heating condition; the valve temperature difference is calculated 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, the valve adjustment control logic response analysis of the thermostatic intelligent valve is performed to generate the basic control mode of the intelligent valve and the constant control mode of the intelligent valve, wherein 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, and 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 the 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 flow adjustment mode obtained by the previous regulation, the thermostatic intelligent valve starts to operate under the action of the received DDC analog control signal. At this time, real-time monitoring is performed through the temperature sensor to obtain the water supply temperature and return water temperature of the intelligent valve respectively. The temperature sensor needs to be installed at the inlet and outlet of the valve to accurately record the temperature data of the water supply and return water. In particular, after the system runs for 30 minutes under the action of the DDC analog control signal, the actual water supply 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: Intelligent valve measured temperature difference = |Supply water temperature - return water temperature|, where under cooling conditions, the actually measured temperature difference of the smart valve = return water temperature - supply water temperature, and under heating conditions, the actually measured temperature difference of the smart valve = supply water temperature - return water temperature. The temperature difference value will be used to judge the effectiveness of the current adjustment mode under dual-mode control, and by combining these temperature difference data, the control system will perform valve adjustment control logic response analysis to generate a basic control mode of the smart valve and a constant control mode of the smart valve adapted to the current working conditions. The basic control modes include 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, etc. The constant control mode includes constant temperature difference control mode and constant return water temperature control mode. These modes can help the constant temperature smart valve system to accurately control the valve according to different needs.

[0026] S3: Obtain the set temperature difference of the smart valve and the set return water temperature of the smart valve, and perform basic valve control processing on the corresponding constant temperature smart valve based on the basic control mode of the smart valve and in combination with the set temperature difference of the smart valve and the set return water temperature of the smart valve, the measured temperature difference of the smart valve and the measured return water temperature of the smart valve, so as to perform corresponding smart 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;

[0027] In an embodiment of the present invention, the valve is actually regulated by a basic regulation mode based on the intelligent valve. In this step, the temperature difference value (i.e., 0-40°C) and the return water temperature value (-20-120°C) set by the intelligent valve are first obtained. These set values ​​are used as target parameters to guide subsequent valve regulation, and the valve is basically regulated according to the set temperature difference and return water temperature, and in combination with the real-time monitored temperature difference and return water temperature of the intelligent valve. In specific implementation, the regulation work will be performed according to different regulation modes. For example, if the position and temperature difference regulation mode is selected, the position opening of the valve will be adjusted based on the deviation between the current temperature difference and the set temperature difference to meet the expected temperature difference; if the flow and temperature difference regulation mode is selected, the flow regulation will be adjusted according to the set and measured temperature difference to achieve the goal of constant temperature difference. This regulation process is also applicable to other regulation modes such as flow and return water temperature regulation, position and return water temperature regulation, among which the flow and return water temperature regulation mode controls the flow to maintain the return water The temperature is stable; the position and return water temperature control mode can determine whether the heat exchange effect meets the expectations by measuring the return water temperature. If the return water temperature is too high, it means that the heat is not completely transferred out. It is necessary to adjust the position of the valve or pump in the system to reduce heat loss and maintain the system balance, so as to accurately control the temperature; the energy control mode focuses on adjusting the supply of heat or cold energy in the system to meet the load demand. In this mode, the operating status of each device is adjusted according to the load change and the set target energy consumption to avoid excessive or insufficient energy supply; and the pressure difference control mode controls the flow by monitoring and adjusting the pressure difference in the pipeline network to ensure a balanced supply of flow and heat. The core logic of each control mode is to compare the set parameters with the measured data in real time, and adjust the position or flow of the valve in time to keep the system running under high efficiency and precise control, and finally 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.

[0028] S4: Based on the intelligent valve constant control mode and in combination with the intelligent valve set temperature difference and the intelligent valve set return water temperature, the corresponding constant temperature intelligent valve is subjected to valve constant control processing to execute the corresponding intelligent valve constant temperature difference control and constant return water temperature control control work.

[0029] In the embodiment of the present invention, after completing the execution of the basic control mode, the execution of the constant control mode is 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 controls the valve according to the set temperature difference and return water temperature value. In the constant temperature difference control mode, the system will maintain the valve opening or flow adjustment to keep the valve at a constant temperature difference to ensure the stability and efficiency of the heat exchange. If the constant return water temperature control mode is entered, the valve will be adjusted according to the set return water temperature to keep the return water temperature within the set range to prevent the temperature from being too high or too low and affecting the system operation. Regardless of which constant control mode is used, 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 consistent. This process needs to be combined with the data monitored in real time by the temperature sensor, and the feedback control algorithm is used to perform specific valve adjustment, and finally the corresponding intelligent valve constant temperature difference control and constant return water temperature control work are performed.

[0030] Furthermore, the method of receiving the DDC analog control signal corresponding to the distributed control system in real time through the electric actuator in the thermostatic intelligent valve and performing standby mode vibration-free judgment on the DDC analog control signal includes the following steps:

[0031] The distributed control system DDC is used to simulate the real-time response control of the thermostatic intelligent valve to generate a DDC analog control signal corresponding to the distributed control system;

[0032] In an embodiment of the present invention, a distributed control system (DDC) is used to simulate real-time response control of a thermostatic intelligent valve. At this time, the distributed control system generates a corresponding analog control signal and transmits the signal to the electric actuator of the intelligent valve through a controller. The analog control signal adjusts the valve opening in real time according to real-time changing parameters such as temperature and pressure. Specifically, the DDC automatically adjusts the response of the thermostatic intelligent valve by monitoring and adjusting the current system parameters 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 the response control generates a DDC analog control signal corresponding to the distributed control system.

[0033] Preferably, the DDC analog control signal corresponding to the distributed control system is received in real time by the electric actuator in the thermostatic intelligent valve, and the DDC analog control signal is compared and judged according to the preset analog minimum signal standard and the analog no signal standard. If the DDC analog control signal meets the preset analog minimum signal standard, the corresponding DDC analog control signal is determined as the analog minimum control signal; if the DDC analog control signal meets the preset analog no signal standard, the corresponding DDC analog control signal is determined as the analog no control signal; the corresponding thermostatic intelligent valve under the analog minimum control signal or the analog no control signal is subjected to standby mode response control to generate an intelligent valve standby mode response control instruction;

[0034] In the embodiment of the present invention, the analog control signal from the DDC control system is received by the electric actuator and begins to be processed. First, the electric actuator compares the received analog signal with the preset analog minimum signal standard (e.g., [0-10V], [2-10V]) and the analog no signal standard (e.g., [2-10V], [4-20mA]). If the strength of the DDC analog control signal meets the preset analog minimum signal standard, the signal is regarded as the analog minimum control signal and triggers the thermostatic intelligent valve to enter the standby mode. Secondly, the electric actuator will also compare the DDC analog control signal with the analog no-signal standard. If the DDC analog control signal meets the preset analog no-signal standard, it will be in a no-signal state, and the signal will be judged as an analog no-control signal, and the smart valve will be set to standby mode. In this mode, the electric actuator will adjust the valve state to ensure that the valve enters a low-power standby state to prevent invalid operations from affecting the system, and finally respond to generate a smart valve standby mode response control instruction under the analog minimum control signal or analog no control signal.

[0035] Preferably, if the DDC analog control signal does not meet the preset analog minimum signal standard nor the preset analog no signal standard, a signal vibration amplitude statistical analysis is performed on the corresponding DDC analog control signal to obtain a vibration amplitude characteristic value of the DDC analog control signal;

[0036] In an embodiment of the present invention, when the DDC analog control signal does not meet the analog minimum signal standard or the analog no-signal standard, a vibration amplitude statistical analysis will be performed on the control signal. The vibration amplitude refers to the fluctuation intensity of the analog signal over a period of time, which is 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 determined. At this time, the vibration amplitude characteristic values ​​of the signal will be extracted based on the data collected by the sensor using spectrum analysis, amplitude detection and other methods. These characteristic values ​​will help subsequent evaluations and vibration-free judgments, and ultimately obtain the vibration amplitude characteristic values ​​of the DDC analog control signal.

[0037] Preferably, the mechanical characteristics and system load corresponding to the electric actuator in the thermostatic intelligent valve are obtained, and the vibration amplitude characteristic value of the DDC analog control signal is evaluated and calculated for standby mode vibration-free based on the mechanical characteristics and system load corresponding to the electric actuator, so as to obtain the vibration-free efficiency judgment value of the standby mode of the intelligent valve;

[0038] In the embodiment of the present invention, the vibration-free evaluation calculation is performed 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 load condition of the system to evaluate whether the vibration amplitude of the current control signal will cause unnecessary vibration. The acquisition of the load state is achieved through sensor feedback. The load changes monitored by the sensor will be input into the evaluation algorithm. The algorithm is based on different load conditions, that is, Evaluate the efficiency of the thermostatic intelligent valve system affected by different vibration amplitudes to avoid oscillation. The evaluation result is the "smart valve standby mode vibration-free efficiency judgment value", which represents whether the valve can effectively avoid vibration in standby mode under the current conditions, or whether the vibration amplitude will affect the long-term stability of the system. For example, a dead zone of 1% is given to avoid oscillation, and finally the smart valve standby mode vibration-free efficiency judgment value is obtained.

[0039] Preferably, based on the vibration-free efficiency judgment value of the intelligent valve standby mode, the signal vibration amplitude corresponding to the DDC analog control signal is subjected to vibration-free comparison judgment. 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, the corresponding constant temperature intelligent valve is subjected to standby mode response control 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, the DDC analog control signal corresponding to the distributed control system is received again, and the iterative judgment is continued;

[0040] In an embodiment of the present invention, the vibration-free efficiency judgment value of the intelligent valve standby mode obtained by the previous quantitative calculation is used to perform a vibration-free comparison 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 produce excessive vibration under the vibration amplitude, so that the standby mode response of the intelligent valve can be maintained normally. At this time, a standby mode response control instruction is generated in response, and the instruction is 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 conditions are met.

[0041] Preferably, the intelligent valve standby mode response control instruction is applied to the thermostatic intelligent valve and state response control is performed to obtain the intelligent valve standby mode state.

[0042] In an embodiment of the present invention, the intelligent valve standby mode response control instruction generated by the previous response is transmitted to the constant temperature intelligent valve to start the electric actuator to make corresponding state adjustments. Specifically, the electric actuator will adjust the valve opening, position and other control parameters 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, avoid invalid vibration or excessive adjustment, and ensure the long-term stable operation of the constant temperature intelligent valve, and finally obtain the intelligent valve standby mode state.

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

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

[0045] In the embodiment of the present invention, in the standby mode of the intelligent valve, an analog control signal is first received from a distributed control system (DDC), and the signal represents the valve position opening that the system needs to adjust. The received analog control signal will be used as an input parameter of the electric actuator to adjust the valve position of the thermostatic intelligent valve. Specifically, the electric actuator accurately adjusts the valve opening of the thermostatic intelligent valve by executing the control signal. This process is achieved through the mechanical movement of the electric actuator, so that the valve opening 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 the electric actuator to ensure that the valve position is highly consistent with the received analog control signal, ensuring that the thermostatic intelligent valve can respond and adjust the opening in real time in the system standby mode, and finally controls and generates the corresponding valve position opening adjustment control mode (such as Figure 2 shown).

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

[0047] In an embodiment of the present invention, when the smart valve is in standby mode, the flow sensor equipped with the constant temperature smart valve starts to measure the actual flow of the valve in real time. This process first collects the fluid flow data on both sides of the valve through the flow sensor. The flow sensor generates a corresponding electrical signal according to the actual amount of fluid passing through, and transmits the signal to the control system for analysis and processing. The data processing module of the sensor can accurately convert it into a standard flow 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 smart valve.

[0048] Preferably, the electric actuator in the intelligent valve standby mode is used in combination with the DDC analog control signal received again to perform valve flow regulation control on the actual measured standard flow of the intelligent valve, thereby generating a valve flow regulation control mode.

[0049] In an embodiment of the present invention, in the standby mode of the smart valve, the electric actuator of the smart valve uses the received analog control signal and the real-time flow data fed back by the flow sensor to accurately adjust the flow of the thermostatic smart valve. The electric actuator compares the real-time flow information provided by the flow sensor with the flow target set by the control system to calculate the valve position or flow size that needs to be adjusted. If there is a deviation between the actual flow 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 valve flow regulation and maintains flow stability through continuous adjustment actions in standby mode. The feedback mechanism in the system and the control strategy of the actuator work closely together to form a closed-loop control, thereby ensuring the response speed and control accuracy of the thermostatic smart valve during operation, making the valve flow regulation more efficient and stable, and ultimately controlling the generation of the valve flow regulation control mode.

[0050] Furthermore, the method of using a temperature sensor to monitor the supply and return water temperature of the thermostatic intelligent valve in real time based on the valve position adjustment opening control mode and the valve flow adjustment opening control mode after the DDC analog control signal runs for 30 minutes includes the following steps:

[0051] Based on the dual-mode conditions of valve position adjustment opening control mode and valve flow adjustment opening control mode, and after the DDC analog control signal runs for 30 minutes, the water supply working mode of the thermostatic intelligent valve is determined to obtain the water supply working mode of the intelligent valve and the return water working mode of the intelligent valve;

[0052] In an embodiment of the present invention, under the dual-mode conditions of the valve position adjustment opening control mode and the valve flow adjustment opening control mode, the DDC analog control signal is first received, and after it has been running for 30 minutes, the signal is ensured to be stable and reflect the real-time status of the system. The received analog signal provides a basis for the valve opening and flow regulation control, so that the actuator of the thermostatic intelligent valve accurately adjusts the valve opening and flow according to the instruction, thereby achieving stable operation of the thermostatic 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 thermostatic intelligent valve has entered the water supply working mode, and determines the working mode of the thermostatic intelligent valve, including the water supply working mode and the return water working mode, through the dynamic adjustment of the valve and the flow. In this process, by monitoring the analog signal and combining the real-time status feedback of the thermostatic intelligent valve, the working mode of the valve can be determined after 30 minutes, and then it can be determined whether the current valve is in the correct water supply or return water state, ensuring that the system is in the expected working environment, and finally obtaining the intelligent valve water supply working mode and the intelligent valve return water working mode.

[0053] Preferably, a temperature sensor is used to monitor the water supply temperature of the thermostatic smart valve in the smart valve water supply working mode in real time to obtain the actually measured water supply temperature of the smart valve;

[0054] In an embodiment of the present invention, a temperature sensor is used to monitor the water temperature in the water supply pipeline in real time after the constant temperature intelligent valve enters the water supply working mode. 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 of the valve water supply can be accurately reflected, and finally the actual 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 smart valve under different working conditions in the smart valve return water working mode in real time to obtain the actually measured return water temperature of the smart valve, wherein the actually measured return water temperature of the smart valve includes the actually measured return water temperature under cooling conditions and heating conditions.

[0056] In an embodiment of the present invention, after the thermostatic intelligent valve enters the return water working mode, it is necessary to monitor the water temperature in the return water pipe 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 of the return water pipeline and can collect water temperature information under different working conditions. Under the cooling 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 under the cooling mode in the subsequent process; under the heating condition, the sensor measures the return water temperature and ensures that it meets the requirements of the heating mode, accurately distinguishes the temperature requirements under the working conditions, thereby achieving efficient temperature control and regulation, and finally real-time monitoring is used to obtain the actual measured return water temperature of the intelligent valve, wherein the actual measured return water temperature of the intelligent valve includes the actual measured return water temperature under the cooling condition and the heating condition.

[0057] Further, the valve regulation control logic response analysis of the thermostatic intelligent valve based on the DDC analog control signal under the dual-mode condition 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:

[0058] Based on the DDC analog control signal under dual-mode conditions, a linear regression impact assessment analysis is performed on the measured temperature difference of the smart valve and the measured return water temperature of the smart valve, so as to obtain the linear regression impact assessment result between the control signal on the temperature difference and the return water temperature under dual-mode conditions;

[0059] In an embodiment of the present invention, by collecting DDC (direct digital control) analog control signals and corresponding measured temperature difference and return water temperature data when the intelligent valve is running under dual-mode conditions, the DDC analog control signals are usually generated by the system controller according to load changes and other external environmental parameters. The measured temperature difference of the intelligent valve refers to the temperature difference of the fluids on both sides of the valve, and the return water temperature is the temperature of the water flow returning to the valve from the system loop. All data should be collected under stable conditions to ensure the validity of the linear regression analysis results. After collecting the data, the linear regression method will be used to analyze the relationship between the DDC analog control signal and the temperature difference and the return water temperature. The purpose of the linear regression analysis is to evaluate the influence of the change of the analog control signal on the temperature difference and the 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 calculation to obtain a linear regression equation between the control signal and the temperature difference and the return water temperature. The regression result will provide a basis for the judgment in the subsequent steps, help evaluate whether the control signal has a significant impact on the system operation, and finally obtain the linear regression impact evaluation result between the control signal and the temperature difference and the return water temperature under dual-mode conditions.

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

[0061] In an embodiment of the present invention, after completing the linear regression analysis, it is then determined whether the DDC analog control signal has a significant effect on the temperature difference and the return water temperature based on the regression results. If the regression analysis results show that the temperature difference and the return water temperature change with the change of the DDC analog control signal, it means that the control signal has a certain influence on the temperature regulation of its thermostatic intelligent valve. In this case, the control system will generate the corresponding valve basic control logic instructions through the PID regulation controller. In specific implementation, the PID controller first calculates the contribution of each control parameter (such as proportional, integral, and differential terms) to the temperature difference and return water temperature regulation based on the linear regression analysis results. On this basis, the PID controller adjusts the control signal output so that the thermostatic intelligent valve can more accurately adjust the valve opening or flow rate to achieve the set value of the temperature difference or return water temperature. If the regression results show 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 a set constant state, thereby stabilizing the system operation and finally generating a valve constant control logic instruction.

[0062] Preferably, the basic valve control logic instruction is applied to the thermostatic intelligent valve and the DDC analog control signal is received to perform the basic valve control logic response to generate the basic control mode of the intelligent valve, wherein 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;

[0063] In an embodiment of the present invention, after generating a basic valve control logic instruction in a previous response, the intelligent valve will perform a corresponding adjustment operation according to the instruction. The basic valve control mode includes a variety of control strategies, such as 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. The selection of these modes depends on the control target of the valve and the analysis result of the control signal. In specific implementation, the PID controller selects a corresponding control mode according to the set target of the temperature difference or return water temperature. For example, if the goal is to control the temperature difference to be stable and the return water temperature changes slightly, the position and temperature difference control mode is selected, in which the temperature difference is adjusted by adjusting the opening of the valve position; if the goal is to ensure that the return water temperature is constant, the flow and return water temperature control mode is selected, and the return water temperature is kept stable by controlling the flow; the flow and temperature difference control mode is a way to adjust the operation according to the system flow and temperature difference. In this mode, the operating state of the equipment will be adjusted according to the set temperature difference and flow to maintain the heat exchange efficiency and meet the load demand; the position and return water temperature control mode is a way to adjust the operation according to the system flow and temperature difference. In this mode, the operating state of the equipment will be adjusted according to the set temperature difference and flow to maintain the heat exchange efficiency and meet the load demand; the position and return water temperature control mode is a way to adjust the operation according to the system flow and temperature difference. In this mode, the operating state of the equipment will be adjusted according to the set temperature difference and flow to maintain the heat exchange efficiency and meet the load demand. The water temperature control mode can determine whether the heat exchange effect meets expectations by measuring the return water temperature. If the return water temperature is too high, it means that the heat is not completely transferred out. It is necessary to adjust the position of the valve or pump in the system to reduce heat loss and maintain system balance, so as to accurately control the temperature. The energy control mode focuses on regulating the supply of heat or cold energy in the system to meet the load demand. In this mode, the operating status of each device is adjusted according to the load change and the set target energy consumption to avoid excessive or insufficient energy supply. The pressure difference control mode controls the flow by monitoring and adjusting the pressure difference in the pipe network to ensure the balanced supply of flow and heat. Pressure difference control can maintain stable operation of the system, prevent excessive or too small flow, and avoid damage to the system due to pressure imbalance. When executing the control command, the intelligent valve is dynamically adjusted 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 valve control system adjusts the valve status in real time through the feedback mechanism to ensure that the temperature difference or 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 valve constant control logic instruction is applied to the thermostatic intelligent valve and the DDC analog control signal is received to perform the valve constant control logic response to generate an intelligent valve constant control mode, wherein 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 the analysis results show that the DDC analog control signal has no significant effect on the change of temperature difference and return water temperature, a valve constant control logic instruction is generated accordingly to act on the corresponding constant temperature intelligent valve. The purpose of the constant control logic is to keep the intelligent valve in a stable working state, independent of the fluctuation of the external control signal. In this case, the constant control mode executed by the intelligent valve includes a constant temperature difference control mode and a constant return water temperature control mode. In the constant temperature difference control mode, the valve is adjusted to a fixed opening or flow to keep the temperature difference in the system constant and ensure that the heat exchange efficiency is not affected by fluctuations; while the return water temperature control mode controls the flow or valve opening to maintain the return water temperature at the target set value to avoid the system efficiency being reduced 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 is stable within the target range for a long time, ensuring that the system can still achieve stable regulation under complex environmental conditions, and finally responds to generate a constant control mode of the intelligent valve.

[0066] Further, the basic valve control processing of the corresponding thermostatic intelligent valve based on the basic control 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 includes the following steps:

[0067] Perform deviation sampling and averaging calculation on the actually measured temperature difference of the smart valve and the actually measured return water temperature of the smart valve to obtain the temperature difference deviation value of the smart valve and the return water temperature deviation value of the smart valve, wherein the temperature difference deviation value of the smart valve includes a positive temperature difference deviation value and a negative temperature difference deviation value, and the return water temperature deviation value of the smart valve includes a positive return water temperature deviation value and a negative return water temperature deviation value under cooling conditions and heating conditions;

[0068] In an embodiment of the present invention, by performing an average operation on the deviation sampling of the actually measured temperature difference and the actually measured return water temperature of the smart valve, it is first necessary to collect multiple temperature difference and return water temperature data within a set time interval. These data are monitored in real time by a temperature sensor, and the real-time temperature value measured by the sensor is sent to the control system of the smart valve. A temperature difference deviation value is calculated for the temperature difference of the smart valve, wherein a positive temperature difference deviation value refers to a situation where the actually measured temperature difference of the smart valve is higher than the set temperature difference, and a negative temperature difference deviation value refers to a 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 negative deviation value of the return water temperature respectively indicate 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 average calculations, a more stable deviation value can be obtained to help with the judgment and execution of subsequent control, and ultimately obtain the smart valve temperature difference deviation value and the smart valve return water temperature deviation value, where the smart valve temperature difference deviation value includes a positive temperature difference deviation value and a negative temperature difference deviation value, and the smart valve return water temperature deviation value includes a positive return water temperature deviation value and a negative return water temperature deviation value under cooling conditions and heating conditions.

[0069] Preferably, 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 actually measured temperature difference of the intelligent valve are compared and judged based on the temperature difference deviation value of the intelligent valve. If the actually measured temperature difference of the intelligent valve is ≥ 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 opening; if the actually measured temperature difference of the intelligent valve is < the set temperature difference of the intelligent valve + the positive temperature difference deviation value, the corresponding constant temperature intelligent valve performs the work of adjusting the opening according to the actually measured temperature difference control logic of the intelligent valve, and is not controlled by the external DDC analog control signal, and it performs the iterative cycle control execution according to this judgment result in the following time;

[0070] In an 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, the set temperature difference of the intelligent valve and the actually measured temperature difference of the intelligent valve are compared and judged according to the previously obtained temperature difference deviation value of the intelligent valve. 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 needs to be adjusted accordingly. At this time, the constant temperature intelligent valve adjusts the opening and performs the control task by receiving the analog control signal from the DDC (direct digital control) system; conversely, 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 will autonomously adjust according to its own temperature difference deviation value, and the adjusted opening will continue to iterate and execute cyclically 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 it does not rely 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 and temperature difference control mode, the set temperature difference of the intelligent valve and the actually measured temperature difference of the intelligent valve are compared and judged based on the temperature difference deviation value of the intelligent valve. If the actually measured temperature difference of the intelligent valve is ≥ 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; if the actually measured temperature difference of the intelligent valve is < the set temperature difference of the intelligent valve + the positive temperature difference deviation value, the corresponding constant temperature intelligent valve performs the work of adjusting the flow according to the actually measured temperature difference control logic of the intelligent valve, and is not controlled by the external DDC analog control signal, and iterates and loops the control execution according to this judgment result in the next period of time;

[0072] In an embodiment of the present invention, when it is determined that the basic control mode of the intelligent valve is the flow and temperature difference control mode, the implementation process is similar to the position and temperature difference control mode, but the control object is changed from valve position opening adjustment to flow adjustment. In this mode, the intelligent valve first compares the set temperature difference of the intelligent valve and the actual temperature difference of the intelligent valve according to the previously calculated temperature difference deviation value. If the actual temperature difference is greater than or equal to the set temperature difference plus the negative temperature difference deviation value, the flow of the valve will be adjusted by the DDC analog control signal to ensure the coordination of the flow and the temperature difference; if the actual temperature difference is less than the set temperature difference plus the positive temperature difference deviation value, the intelligent valve will no longer accept the external DDC control signal, but will directly adjust the flow according to the temperature difference deviation. This adjustment method can effectively control the flow changes in the refrigeration or heating system and ensure the dynamic matching of the temperature difference and the flow. In this process, the control system will also dynamically monitor the feedback signal of the system and adjust the flow in real time to avoid excessive fluctuations or unnecessary flow adjustment, and iterate the control execution according to this judgment result in the subsequent period of 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 actually 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 actually measured return water temperature under the refrigeration condition is ≥ the set return water temperature of the intelligent valve + the negative deviation value of the return water temperature under the refrigeration condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to control the opening; if the actually measured return water temperature under the refrigeration condition is < the set return water temperature of the intelligent valve + the positive deviation value of the return water temperature under the refrigeration condition, the corresponding constant temperature intelligent valve performs the work of adjusting the opening according to the actually measured return water temperature control logic under the refrigeration condition, and is not controlled by the external DDC analog control signal, and is adjusted within the next period of time. Iterative loop control is executed according to this judgment result; and when the corresponding constant temperature intelligent valve is in heating condition, the set return water temperature of the intelligent valve and the measured return water temperature under heating condition are compared and judged based on the return water temperature deviation value of the intelligent valve under heating condition. If the measured return water temperature under heating condition is ≤ the set return water temperature of the intelligent valve + the positive deviation value of the return water temperature under heating condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to control the opening; if the measured return water temperature under heating condition is > the set return water temperature of the intelligent valve + the negative deviation value of the return water temperature under heating condition, the corresponding constant temperature intelligent valve adjusts the opening according to the measured return water temperature control logic under heating condition, and is not controlled by the external DDC analog control signal, and iterative loop control is executed according to this judgment result in the following time;

[0074] In an 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 refrigeration condition and the heating condition. Under the refrigeration condition, the return water temperature deviation value under the refrigeration condition is first obtained, and the difference between the set return water temperature of the intelligent valve and the measured return water temperature is compared to determine whether the valve opening needs to be adjusted. If the measured return water temperature is greater than or equal to the set return water temperature plus the negative deviation value of the return water temperature, the valve opening is adjusted by receiving the DDC analog control signal; if the measured return water temperature is less than the set return water temperature plus the positive deviation value of the return water temperature, the intelligent valve directly adjusts itself according to the deviation of the return water temperature, does not accept external DDC signals, and adjusts the opening according to the set control logic to keep the return water temperature within the set range. Under heating conditions, the process is similar. First, the return water temperature deviation value under heating conditions is obtained, and a judgment is made based on 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, the opening control is performed 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 smart valve adjusts the opening according to the return water temperature deviation without relying on an 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 is always kept within a reasonable range under different conditions, thereby ensuring the stability of the heating or cooling effect, and iterating and cyclically controlling the execution according to this judgment result in the following period of time.

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

[0076] In an embodiment of the present invention, when the basic control mode of the intelligent valve is determined to be the "flow and return water temperature control mode", it will first be determined whether the current working condition is cooling or heating. Assuming that the current working condition is cooling, the set return water temperature of the intelligent valve and the measured return water temperature under the cooling condition are compared and judged based on the return water temperature deviation value of the intelligent valve under the cooling condition. If the measured return water temperature is greater than or equal to the set return water temperature plus the negative deviation value of the return water temperature, the constant temperature intelligent valve will accept the analog control signal from the DDC (Direct Digital Control) system to accurately adjust the flow of the valve to achieve the set return water temperature; if the measured return water temperature is less than the set return water temperature plus the positive deviation value of the return water temperature, it will be used by the system to control the opening of the constant temperature intelligent valve without relying on the external DDC analog control signal. The constant temperature intelligent valve will automatically adjust the flow according to the internally set control logic, and this control will continue to be iteratively executed in the next control cycle until the temperature deviation is resolved. Similarly, if the current working condition is heating, the system will compare and judge the set return water temperature of the smart valve and the actual return water temperature under the heating condition based on the return water temperature deviation value of the smart valve under the heating condition. If the actual return water temperature is less than or equal to the set return water temperature plus the positive return water temperature deviation value, the valve accepts the adjustment from the DDC analog signal to control the flow; if the actual return water temperature is greater than the set return water temperature plus the negative return water temperature deviation value, the constant temperature smart valve relies on its own temperature control logic to perform flow regulation control, and this control will iterate in the following 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 is used to adjust the valve energy of the corresponding thermostatic 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, the thermostatic intelligent valve receives the analog control signal from the DDC system through the electric actuator. According to the control signal, the intelligent valve performs an adjustment operation to achieve control of the valve energy flow. The system first calculates the required energy flow through a mathematical model based on the current flow demand and parameters such as heat load, and converts this demand into a corresponding analog control signal. After receiving the signal, the electric actuator adjusts the valve opening according to the real-time status and working requirements of the valve to ensure that the fluid energy flow meets the system requirements, avoids energy waste or substandard temperature control due to excessive or low flow regulation, and finally performs the work of adjusting the valve energy.

[0079] Preferably, when it is determined that the basic control mode of the intelligent valve is the pressure differential control mode, the measured pressure differential between the inside and outside of the valve is measured in real time by the built-in pressure sensor of the constant temperature intelligent valve, and the measured pressure differential between the inside and outside of the valve is also subjected to deviation sampling and averaging operations to obtain the positive deviation value of the intelligent valve pressure differential and the negative deviation value of the intelligent valve pressure differential; based on the positive deviation value of the intelligent valve pressure differential and the negative deviation value of the intelligent valve pressure differential, the measured pressure differential and the set pressure differential corresponding to the constant temperature intelligent valve are compared; if the measured pressure differential ≤ the set pressure differential + the negative deviation value of the intelligent valve pressure differential, the constant temperature intelligent valve B is obtained. The glycol flow rate and heat exchange rate are calculated, and based on the glycol flow rate and heat exchange rate of the constant temperature intelligent valve, the DDC analog control signal is corrected and calculated to obtain the glycol flow correction control signal; according to the glycol flow correction control signal, the constant temperature intelligent valve is responded to to adjust the opening; if the measured pressure difference> set pressure difference+positive deviation value of intelligent valve pressure difference, the corresponding constant temperature intelligent valve adjusts the opening according to the measured pressure difference control logic, which is not controlled by the external DDC analog control signal, and is iteratively controlled and executed according to this judgment result in the following time.

[0080] In an embodiment of the present invention, when it is determined that the control mode of the intelligent valve is the "pressure differential control mode", the built-in pressure sensor of the valve will monitor the pressure differential between the inside and outside of the valve in real time. In order to achieve precise control, the system will collect and analyze the pressure differential data, and perform deviation sampling and averaging operations to obtain the positive and negative deviation values ​​of the pressure differential. By combining the positive and negative deviation values ​​of the pressure differential, the measured pressure differential and the set pressure differential are compared to make a decision. If the measured pressure differential is less than or equal to the set pressure differential plus the negative pressure differential deviation value, the corresponding ethylene glycol flow rate and heat exchange rate under the current state of the thermostatic 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 accurately adjust the opening of the thermostatic intelligent valve to ensure that the pressure difference returns to the set range; if the measured pressure difference is greater than the set pressure difference plus the pressure difference positive deviation value, the thermostatic intelligent valve will use the internal control logic to adjust the opening according to the current measured pressure difference, without relying on the external DDC analog control signal. In this case, the thermostatic intelligent valve automatically adjusts the opening according to the pressure difference control strategy to keep the pressure difference in the system stable and ensure that the adjustment process can be continuously executed until the system reaches the required working state, which can effectively avoid energy waste or system efficiency reduction caused by pressure difference out of control.

[0081] Furthermore, the deviation sampling and averaging operation of the actually measured temperature difference of the smart valve and the actually measured return water temperature of the smart valve includes the following steps:

[0082] By performing time series sampling processing on the measured temperature difference of the smart valve and the measured return water temperature of the smart valve at a sampling time of 2s each time, the measured temperature difference sampling value and the measured return water temperature sampling value within each sampling time are obtained;

[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. In specific implementation, the sampling interval is set to 2 seconds, and real-time data collection is performed in the entire control system. During the sampling process, the temperature difference sensor and the return water temperature sensor are installed at the water inlet and return water outlet of the valve to measure the temperature difference value and the return water temperature value respectively. Every 2 seconds, the sensor will 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 sample, the processing unit stores them in time series to form a data set with a length of N (N is the number of sampling times), which includes the temperature difference sampling values ​​and the return water temperature sampling values ​​at each moment, and finally obtains the measured temperature difference sampling values ​​and the measured return water temperature sampling values ​​within each sampling time.

[0084] Preferably, the measured temperature difference sampling values ​​and the measured return water temperature sampling values ​​within 15 sampling times are subjected to deviation sampling and averaging operations according to the operation time interval of 30s, and the deviation value is adjusted at an interval of every 3 minutes to obtain the smart valve temperature difference deviation value and the smart valve return water temperature deviation value, wherein the smart valve temperature difference deviation value includes a positive temperature difference deviation value and a negative temperature difference deviation value, and the smart valve return water temperature deviation value includes a positive return water temperature deviation value and a negative return water temperature deviation value under cooling conditions and heating conditions.

[0085] In the embodiment of the present invention, the measured temperature difference sampling value and the return water temperature sampling value obtained by the previous sampling are subjected to deviation sampling and averaging operation. First, the operation time interval is defined as 30 seconds. According to this time interval, 15 data points are extracted from the original sampling data obtained previously, and the average values ​​of the temperature difference value and the return water temperature value within the time period are calculated. Specifically, assuming that the nth data point in the sampling data set is T n (temperature difference) and R n (return water temperature), then After obtaining the average value of 15 samples, the corresponding sampling average value is determined as the temperature difference deviation value and the return water temperature deviation value in the current state, and then the next stage of deviation adjustment is entered. According to the set adjustment cycle, the temperature difference deviation and the return water temperature deviation value are adjusted once every 3 minutes to ensure that the valve can maintain the optimal temperature control effect under different working conditions (such as cooling conditions and heating conditions). 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 a positive value, it indicates that the actual temperature difference is large, and the system will increase the valve opening; conversely, if the deviation is a negative value, the system will reduce the valve opening. Similarly, for the return water temperature deviation, if the return water temperature deviation is large, the system cooling or heating strength will be adjusted according to actual needs to ensure that the return water temperature is stable within the preset range, and finally the intelligent valve temperature difference deviation value and the intelligent valve return water temperature deviation value are obtained.

[0086] Furthermore, the signal correction calculation of the DDC analog control signal based on the glycol flow and heat exchange of the thermostatic intelligent valve is calculated by the glycol flow and heat exchange correction calculation formula, wherein the glycol flow and heat exchange correction calculation formula is specifically:

[0087]

[0088] In the formula, is the glycol flow 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 glycol heat exchange capacity of the thermostatic intelligent valve at time τ, Q nom is the calibrated heat transfer rate of the thermostatic intelligent valve system, α1 is the influence factor of heat transfer rate signal deviation correction, T in is the flow rate of ethylene glycol inflow, T out is the outflow flow rate of ethylene glycol, T sct is the target flow rate of ethylene glycol in the thermostatic smart valve, T nom is the calibration flow of the thermostatic intelligent valve system, α2 is the flow signal deviation correction influencing factor, and η is the correction coefficient of the ethylene glycol flow correction control signal.

[0089] The present invention obtains a glycol flow heat exchange correction calculation formula by using a specific mathematical model and after verification, which is used to perform signal correction calculation on the DDC analog control signal. The glycol flow heat exchange correction calculation formula can effectively eliminate the deviation caused by different factors (such as heat exchange and temperature difference) by correcting the flow signal. By integrating the deviation between the actual heat exchange and the calibrated heat exchange, the actual adjustment value of the glycol flow can be closer to the target flow required by the system, thereby improving the adjustment accuracy of the control system. The formula compares the actual operation of the system with the design parameters through integral compensation and temperature difference correction. When the system deviates, the flow control signal can be dynamically adjusted according to the real-time changes of the heat exchange and flow. This correction mechanism enables the intelligent valve to better adapt to load changes, pipeline characteristics changes or other system instabilities, thereby ensuring the stable operation of the system. In actual operation, the heat exchange effect is affected by many factors, such as flow changes, temperature changes, etc. The formula introduces the proportional relationship between the heat exchange and its calibrated value to cumulatively correct the deviation of the system, thereby compensating for the error caused by unstable heat exchange and maintaining the stability of flow control. By precisely adjusting the glycol flow rate, the heat transfer efficiency can be optimized, excessive or insufficient flow control can be avoided, and energy consumption can be reduced. This is especially important in systems with high energy efficiency requirements, such as temperature control systems, heat exchange systems, etc. This allows the control signal to be corrected according to the actual pressure difference and flow rate, and the valve opening can be adjusted dynamically. This not only reduces the dependence on external analog control signals, but also allows the valve to be adjusted autonomously, increasing the flexibility of the system. In addition, through the introduction of the correction coefficient, the control signal is further fine-tuned, which can better respond to changes in the external environment and ensure the stability of the system. During long-term operation, this fine-tuning mechanism can effectively avoid system performance degradation due to fluctuations in external factors and improve the long-term reliability of the system. In summary, this formula fully takes into account the glycol flow correction control signal DDC analog control signal Q, time range parameter t, integral time variable parameter τ, constant temperature intelligent valve glycol heat exchange Q(τ) at time τ, constant temperature intelligent valve system calibrated heat exchange Q nom , heat transfer signal deviation correction influence factor α1, glycol inflow fluid flow rate T in , glycol outflow fluid flow rate T out , constant temperature intelligent valve glycol target flow T sct , constant temperature intelligent valve system calibration flow T nom , flow signal deviation correction influence factor α2, glycol flow correction control signal correction coefficient η, according to glycol flow correction control signal The correlation between the above parameters constitutes a functional relationship The formula can realize the signal correction calculation process of the DDC analog control signal. At the same time, the introduction of the correction coefficient η of the ethylene glycol flow correction control signal can be adjusted according to the error situation occurring in the calculation process, thereby improving the accuracy and applicability of the ethylene glycol flow heat exchange correction calculation formula.

[0090] Furthermore, the valve constant control processing of the corresponding constant temperature intelligent valve based on the intelligent valve constant control mode and in combination 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 constant control mode of the intelligent valve is the constant temperature difference mode, the corresponding thermostatic intelligent valve is not controlled by the DDC analog control signal, and the supply and return water temperatures of the thermostatic intelligent valve in the current mode are measured in real time, and 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 set temperature difference of the intelligent valve, and the opening is adjusted according to the comparison result to keep the supply and return water temperature difference corresponding to the constant thermostatic intelligent valve constant;

[0092] In an embodiment of the present invention, when the thermostatic intelligent valve enters the constant control mode and selects 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 relies entirely on the internal logic for adjustment. At this time, the thermostatic 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, collect and feedback data through the temperature sensor to form a temperature difference, calculate the current supply and return water temperature difference, and compare it with the set target temperature difference. When the actual temperature difference deviates from the set temperature difference, the control system adjusts the opening of the intelligent valve according to the difference. The adjustment process is completed automatically without manual intervention, and the valve opening will be dynamically adjusted in real time according to the change in temperature difference to ensure that the supply and return water temperature difference is constant within a preset range, thereby achieving precise temperature control. The specific execution process of 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, so as to keep the supply and return water temperature difference corresponding to the constant thermostatic intelligent valve constant.

[0093] Preferably, when it is determined that the constant control mode of the intelligent valve is the constant return water temperature control mode, the corresponding constant temperature intelligent valve is not controlled by the DDC analog control signal at this time, and the return water temperature of the constant temperature intelligent valve in the current mode is measured in real time to obtain the measured return water temperature in the constant return water mode, wherein the measured return water temperature includes the measured return water temperature under the cooling condition and the heating condition; the measured return water temperature under the constant return water mode is subjected to the same deviation sampling and averaging operation to obtain the positive deviation value of the return water temperature and the negative deviation value of the return water temperature under 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 under the cooling condition are compared based on the positive deviation value of the return water temperature under the constant return water mode and the negative deviation value of the return water temperature; 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 under the cooling condition < the set return water temperature of the intelligent valve When the return water temperature in the cooling condition is greater than the positive deviation value of the return water temperature in the constant return water mode, the corresponding constant temperature intelligent valve adjusts the flow rate according to the control logic of the actual return water temperature in the cooling condition, and iterates and loops the control execution according to this judgment result in the following period; when the corresponding constant temperature intelligent valve is in the heating condition, the return water temperature set by the intelligent valve and the actual measured return water temperature in the heating condition are also compared based on the positive deviation value of the return water temperature in the constant return water mode and the negative deviation value of the return water temperature. If the return water temperature set by the intelligent valve + the positive deviation value of the return water temperature in the constant return water mode < the actual measured return water temperature in the cooling condition < the return water temperature set by the intelligent valve + the negative deviation value of the return water temperature in the constant return water mode, the corresponding constant temperature intelligent valve adjusts the flow rate according to the control logic of the actual return water temperature in the heating condition, and iterates and loops the control execution according to this judgment result in the following period until the return water temperature reaches the set value deviation range.

[0094] In an embodiment of the present invention, when the thermostatic intelligent valve enters the constant control mode and selects the constant return water temperature control mode, the connection with the DDC analog control signal is also disconnected. At this time, the intelligent valve is adjusted according to the actual return water temperature, and 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 thermostatic intelligent valve. After the system collects the return water temperature data, it first performs an average operation of the deviation sampling to obtain the positive deviation value and the negative deviation value of the return water temperature. For refrigeration conditions, it will judge whether the current return water temperature is too high or too low based on the set return water temperature and the deviation value. 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 rate 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 rate according to the return water temperature control logic. Under heating conditions, the processing method is similar to that of cooling conditions. 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 the flow rate according to the return water temperature control logic to increase the return water temperature until the temperature reaches the set value deviation range; 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 rate to lower the return water temperature until the temperature reaches the set value deviation range. This control process is based on accurate temperature deviation calculation and is continuously iterated and adjusted in each cycle. Ensure that the return water temperature is always maintained within the deviation range of the set target temperature to ensure stable operation of the system. Specifically, during the execution process, the thermostatic intelligent valve integrates temperature sensors and control algorithms. After each return water temperature data is collected, the deviation will be calculated in real time, and the valve opening or flow rate will be continuously adjusted through real-time feedback. This process is not only based on 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 thermostatic intelligent valve and improve the efficiency of energy use.

[0095] Furthermore, the present invention also provides a thermostatic intelligent valve control system for executing the thermostatic intelligent valve control method as described above, the thermostatic intelligent valve control system comprising:

[0096] The intelligent valve adjustment opening control module is used to receive the DDC analog control signal corresponding to the distributed control system in real time through the electric actuator in the thermostatic intelligent valve, and perform standby mode vibration-free 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 performed on the DDC analog control signal received again, thereby generating 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 adjustment opening control mode, and use the temperature sensor to monitor the supply and return water temperature of the thermostatic intelligent valve in real time after the DDC analog control signal runs 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, wherein the measured return water temperature of the intelligent valve includes the measured return water temperature under the cooling condition and the measured return water temperature of the intelligent valve under the heating condition; the valve temperature difference is calculated according to the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve, and the measured temperature difference of the intelligent valve is obtained; based on the The DDC analog control signal under dual-mode conditions is combined with the actual temperature difference of the intelligent valve and the actual return water temperature of the intelligent valve to perform valve regulation 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, wherein 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, 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 basic control processing module of the intelligent valve 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 valve control processing on the corresponding constant temperature intelligent valve based on the basic control mode of the intelligent valve and in combination with the set temperature difference of the intelligent valve and 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 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 control work;

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

[0100] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may 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 the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A thermostatic intelligent valve control method, characterized in that: The following steps are involved: The electric actuator in the thermostatic intelligent valve receives the DDC analog control signal corresponding to the distributed control system in real time, and performs standby mode vibration-free judgment on the DDC analog control signal to obtain the standby mode state of the intelligent valve; Based on the intelligent valve standby mode state, the valve adjustment control analysis is performed on the DDC analog control signal received again to generate 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 adjustment opening control mode, the temperature sensor is used to monitor the supply and return water temperatures of the thermostatic intelligent valve in real time after the DDC analog control signal runs 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, wherein the measured return water temperature of the intelligent valve includes the measured return water temperature under the cooling condition and the measured return water temperature under the heating condition; the valve temperature difference is calculated 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, the valve adjustment control logic response analysis of the thermostatic intelligent valve is performed to generate the basic control mode of the intelligent valve and the constant control mode of the intelligent valve, wherein 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, and the constant control mode of the intelligent valve includes the constant temperature difference control mode and the constant return water temperature control mode; Obtain the set temperature difference of the smart valve and the set return water temperature of the smart valve, and perform basic valve control processing on the corresponding constant temperature smart valve based on the basic control mode of the smart valve and in combination with the set temperature difference of the smart valve and the set return water temperature of the smart valve, the measured temperature difference of the smart valve and the measured return water temperature of the smart valve, so as to perform the corresponding smart 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 control; Based on the intelligent valve constant control mode and combined with the intelligent valve set temperature difference and the intelligent valve set return water temperature, the corresponding constant temperature intelligent valve is subjected to valve constant control processing to execute the corresponding intelligent valve constant temperature difference control and constant return water temperature control control work.

2. The thermostatic intelligent valve control method according to claim 1, characterized in that: The method of receiving the DDC analog control signal corresponding to the distributed control system in real time through the electric actuator in the thermostatic intelligent valve and performing standby mode vibration-free judgment on the DDC analog control signal includes the following steps: The distributed control system DDC is used to simulate the real-time response control of the thermostatic intelligent valve to generate a DDC analog control signal corresponding to the distributed control system; The DDC analog control signal corresponding to the distributed control system is received in real time by the electric actuator in the thermostatic intelligent valve, and the DDC analog control signal is compared and judged according to the preset analog minimum signal standard and the analog no signal standard. If the DDC analog control signal meets the preset analog minimum signal standard, the corresponding DDC analog control signal is determined as the analog minimum control signal; if the DDC analog control signal meets the preset analog no signal standard, the corresponding DDC analog control signal is determined as the analog no control signal; the corresponding thermostatic intelligent valve under the analog minimum control signal or the analog no control signal is subjected to standby mode response control to generate an intelligent valve standby mode response control instruction; If the DDC analog control signal does not meet the preset analog minimum signal standard, nor does it meet the preset analog no signal standard, a signal vibration amplitude statistical analysis is performed on the corresponding DDC analog control signal to obtain a vibration amplitude characteristic value of the DDC analog control signal; Obtain the mechanical characteristics and system load corresponding to the electric actuator in the thermostatic intelligent valve, and perform standby mode 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, so as to obtain the vibration-free efficiency judgment value of the standby mode of the intelligent valve; Based on the vibration-free efficiency judgment value of the intelligent valve standby mode, the signal vibration amplitude corresponding to the DDC analog control signal is subjected to vibration-free comparison judgment. 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, the corresponding constant temperature intelligent valve is subjected to standby mode response control 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, the DDC analog control signal corresponding to the distributed control system is received again, and the iterative judgment is continued; The intelligent valve standby mode response control instruction is applied to the thermostatic intelligent valve and state response control is performed to obtain the intelligent valve standby mode state.

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

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

5. The thermostatic intelligent valve control method according to claim 1, characterized in that: The valve regulation control logic response analysis of the thermostatic intelligent valve based on the DDC analog control signal under the dual-mode condition and in combination with the actually measured temperature difference of the intelligent valve and the actually measured return water temperature of the intelligent valve comprises the following steps: Based on the DDC analog control signal under dual-mode conditions, a linear regression impact assessment analysis is performed on the measured temperature difference of the smart valve and the measured return water temperature of the smart valve, so as to obtain the linear regression impact assessment result between the control signal on the temperature difference and the return water temperature under dual-mode conditions; The linear regression impact assessment result of the control signal on the temperature difference and the return water temperature under the dual-mode condition is judged. If the linear regression impact assessment result shows that the temperature difference and the return water temperature are affected by the change of the DDC analog control signal under the dual-mode condition, the PID adjustment controller is used to generate a basic valve control logic instruction for the corresponding constant temperature intelligent valve; if the linear regression impact assessment result shows that the temperature difference and the return water temperature are not affected by the change of the DDC analog control signal under the dual-mode condition, the PID adjustment controller is used to generate a constant valve control logic instruction for the corresponding constant temperature intelligent valve; Apply the valve basic control logic instruction to the thermostatic intelligent valve and receive the DDC analog control signal to perform the valve basic control logic response to generate the basic control mode of the intelligent valve, wherein 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 valve constant control logic instruction is applied to the constant temperature intelligent valve and the DDC analog control signal is received to perform the valve constant control logic response to generate the intelligent valve constant control mode, wherein the intelligent valve constant control mode includes a constant temperature difference control mode and a constant return water temperature control mode.

6. The thermostatic intelligent valve control method according to claim 1, characterized in that: The basic valve control process of the corresponding thermostatic intelligent valve based on the basic control 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 includes the following steps: Perform deviation sampling and averaging calculation on the actually measured temperature difference of the smart valve and the actually measured return water temperature of the smart valve to obtain the temperature difference deviation value of the smart valve and the return water temperature deviation value of the smart valve, wherein the temperature difference deviation value of the smart valve includes a positive temperature difference deviation value and a negative temperature difference deviation value, and the return water temperature deviation value of the smart valve includes a positive return water temperature deviation value and a negative return water temperature deviation value under cooling conditions and heating conditions; 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 actually measured temperature difference of the intelligent valve are compared and judged based on the temperature difference deviation value of the intelligent valve. If the actually measured temperature difference of the intelligent valve is ≥ 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 control the opening; if the actually measured temperature difference of the intelligent valve is < the set temperature difference of the intelligent valve + the positive temperature difference deviation value, the corresponding constant temperature intelligent valve performs the work of adjusting the opening according to the actually measured temperature difference control logic of the intelligent valve, and is not controlled by the external DDC analog control signal, and it performs iterative loop control 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 and temperature difference control mode, the set temperature difference of the intelligent valve and the actually measured temperature difference of the intelligent valve are compared and judged based on the temperature difference deviation value of the intelligent valve. If the actually measured temperature difference of the intelligent valve is ≥ 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 control the flow; if the actually measured temperature difference of the intelligent valve is < the set temperature difference of the intelligent valve + the positive temperature difference deviation value, the corresponding constant temperature intelligent valve performs the work of adjusting the flow according to the actually measured temperature difference control logic of the intelligent valve, and is not controlled by the external DDC analog control signal, and iterates and loops the control 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 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 actual 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 actual return water temperature under the refrigeration condition is ≥ the set return water temperature of the intelligent valve + the negative deviation value of the return water temperature under the refrigeration condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to control the opening; if the actual return water temperature under the refrigeration condition is < the set return water temperature of the intelligent valve + the positive deviation value of the return water temperature under the refrigeration condition, the corresponding constant temperature intelligent valve performs the work of adjusting the opening according to the actual return water temperature control logic under the refrigeration condition, and is not controlled by the external DDC analog control signal, and follows this in the next period of time. The judgment result is iteratively executed in a loop control; when the corresponding thermostatic intelligent valve is in a heating condition, the set return water temperature of the intelligent valve and the actual 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 actual return water temperature under the heating condition is ≤ the set return water temperature of the intelligent valve + the positive deviation value of the return water temperature under the heating condition, the corresponding thermostatic intelligent valve receives the DDC analog control signal to control the opening; if the actual return water temperature under the heating condition is > the set return water temperature of the intelligent valve + the negative deviation value of the return water temperature under the heating condition, the corresponding thermostatic intelligent valve adjusts the opening according to the actual return water temperature control logic under the heating condition, and is not controlled by the external DDC analog control signal, and is iteratively executed in a loop control 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 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 actual 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 actual return water temperature under the refrigeration condition is ≥ the set return water temperature of the intelligent valve + the negative deviation value of the return water temperature under the refrigeration condition, the corresponding constant temperature intelligent valve receives the DDC analog control signal to control the flow; if the actual return water temperature under the refrigeration condition is < the set return water temperature of the intelligent valve + the positive deviation value of the return water temperature under the refrigeration condition, the corresponding constant temperature intelligent valve performs the work of adjusting the flow according to the actual return water temperature control logic under the refrigeration condition, and is not controlled by the external DDC analog control signal, and follows this in the next period of time. The judgment result is iteratively executed in a loop; when the corresponding thermostatic intelligent valve is in a heating condition, the set return water temperature of the intelligent valve and the actual 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 actual return water temperature under the heating condition is ≤ the set return water temperature of the intelligent valve + the positive deviation value of the return water temperature under the heating condition, the corresponding thermostatic intelligent valve receives the DDC analog control signal to control the flow; if the actual return water temperature under the heating condition is > the set return water temperature of the intelligent valve + the negative deviation value of the return water temperature under the heating condition, the corresponding thermostatic intelligent valve performs the flow adjustment according to the actual return water temperature control logic under the heating condition, and is not controlled by the external DDC analog control signal, and is iteratively executed in a loop according to this judgment result in the following time; When the basic control mode of the intelligent valve is determined to be the energy control mode, the electric actuator is used to adjust the valve energy of the corresponding thermostatic intelligent valve according to the DDC analog control signal; When it is determined that the basic control mode of the intelligent valve is the pressure differential control mode, the measured pressure differential between the inside and outside of the valve is measured in real time through the built-in pressure sensor of the constant temperature intelligent valve, and the measured pressure differential between the inside and outside of the valve is also sampled and averaged to obtain the positive deviation value of the intelligent valve pressure differential and the negative deviation value of the intelligent valve pressure differential; based on the positive deviation value of the intelligent valve pressure differential and the negative deviation value of the intelligent valve pressure differential, the measured pressure differential and the set pressure differential corresponding to the constant temperature intelligent valve are compared. If the measured pressure differential ≤ the set pressure differential + the negative deviation value of the intelligent valve pressure differential, the constant temperature intelligent valve ethylene glycol is obtained. Flow rate and heat exchange rate, and based on the glycol flow rate and heat exchange rate of the thermostatic intelligent valve, perform signal correction calculation on the DDC analog control signal to obtain the glycol flow correction control signal; according to the glycol flow correction control signal, respond to the thermostatic intelligent valve to adjust the opening; if the measured pressure difference> set pressure difference+positive deviation value of the intelligent valve pressure difference, the corresponding thermostatic intelligent valve will adjust the opening according to the measured pressure difference control logic, which is not controlled by the external DDC analog control signal, and it will iteratively loop control execution according to this judgment result in the following time.

7. The thermostatic intelligent valve control method according to claim 6, characterized in that: The deviation sampling and averaging operation of the temperature difference actually measured by the smart valve and the return water temperature actually measured by the smart valve comprises the following steps: By performing time series sampling processing on the measured temperature difference of the smart valve and the measured return water temperature of the smart valve at a sampling time of 2s each time, the measured temperature difference sampling value and the measured return water temperature sampling value within each sampling time are obtained; According to the operation time interval of 30s, the measured temperature difference sampling values ​​and the measured return water temperature sampling values ​​within 15 sampling times are subjected to deviation sampling and averaging operation, and the deviation value is adjusted every 3 minutes to obtain the intelligent valve temperature difference deviation value and the intelligent valve return water temperature deviation value, wherein 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 cooling conditions and heating conditions.

8. The thermostatic intelligent valve control method according to claim 6, characterized in that: The signal correction calculation of the DDC analog control signal based on the glycol flow and heat exchange of the thermostatic intelligent valve is calculated by the glycol flow and heat exchange correction calculation formula, wherein the glycol flow and heat exchange correction calculation formula is specifically: In the formula, is the glycol flow 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 glycol heat exchange capacity of the thermostatic intelligent valve at time τ, Q nom is the calibrated heat transfer rate of the thermostatic intelligent valve system, α1 is the influence factor of heat transfer rate signal deviation correction, T in is the flow rate of ethylene glycol inflow, T out is the outflow flow rate of ethylene glycol, T sct is the target flow rate of ethylene glycol in the thermostatic smart valve, T nom is the calibration flow of the thermostatic intelligent valve system, α2 is the flow signal deviation correction influencing factor, and η is the correction coefficient of the ethylene glycol flow correction control signal.

9. The thermostatic intelligent valve control method according to claim 1, characterized in that: The method of performing valve constant control processing on the corresponding constant temperature intelligent valve based on the intelligent valve constant control mode and in combination with the intelligent valve set temperature difference and the intelligent valve set return water temperature includes the following steps: When it is determined that the constant control mode of the intelligent valve is the constant temperature difference mode, the corresponding thermostatic intelligent valve is not controlled by the DDC analog control signal, and the supply and return water temperatures of the thermostatic intelligent valve in the current mode are measured in real time, and 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 set temperature difference of the intelligent valve, and the opening is adjusted according to the comparison result to keep the supply and return water temperature difference corresponding to the constant thermostatic intelligent valve constant; When it is determined that the constant control mode of the intelligent valve is the constant return water temperature control mode, the corresponding constant temperature intelligent valve is not controlled by the DDC analog control signal at this time, and the return water temperature of the constant temperature intelligent valve in the current mode is measured in real time to obtain the measured return water temperature in the constant return water mode, wherein the measured return water temperature includes the measured return water temperature under the cooling condition and the heating condition; the measured return water temperature under the constant return water mode is subjected to the same deviation sampling and averaging operation to obtain the positive deviation value of the return water temperature and the negative deviation value of the return water temperature under 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 under the cooling condition are compared based on the positive deviation value of the return water temperature under the constant return water mode and the negative deviation value of the return water temperature; 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 under the cooling condition < the set return water temperature of the intelligent valve + When the return water temperature in the constant return water mode has a positive deviation value, the corresponding constant temperature intelligent valve performs the work of adjusting the flow rate according to the actual return water temperature control logic under the cooling condition, and iterates and loops the control execution according to this judgment result in the following period of time; when the corresponding constant temperature intelligent valve is in the heating condition, the return water temperature set by the intelligent valve and the actual return water temperature under the heating condition are also compared based on the positive deviation value of the return water temperature in the constant return water mode and the negative deviation value of the return water temperature. If the return water temperature set by the intelligent valve + the positive deviation value of the return water temperature in the constant return water mode < the actual return water temperature under the cooling condition < the return water temperature set by 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 rate according to the actual return water temperature control logic under the heating condition, and iterates and loops the control execution according to this judgment result in the following period of time until the return water temperature reaches within the set value deviation range.

10. A constant temperature intelligent valve control system, characterized in that: For executing the thermostatic intelligent valve control method as claimed in claim 1, the thermostatic intelligent valve control system comprises: The intelligent valve adjustment opening control module is used to receive the DDC analog control signal corresponding to the distributed control system in real time through the electric actuator in the thermostatic intelligent valve, and perform standby mode vibration-free 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 performed on the DDC analog control signal received again, thereby generating a valve position opening adjustment control mode and a valve flow adjustment control mode; 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 adjustment opening control mode, and use the temperature sensor to monitor the supply and return water temperature of the thermostatic intelligent valve in real time after the DDC analog control signal runs 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, wherein the measured return water temperature of the intelligent valve includes the measured return water temperature under the cooling condition and the measured return water temperature of the intelligent valve under the heating condition; the valve temperature difference is calculated according to the measured supply water temperature of the intelligent valve and the measured return water temperature of the intelligent valve, and the measured temperature difference of the intelligent valve is obtained; based on the The DDC analog control signal under dual-mode conditions is combined with the actual temperature difference of the intelligent valve and the actual return water temperature of the intelligent valve to perform valve regulation 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, wherein 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, and the constant control mode of the intelligent valve includes the constant temperature difference control mode and the constant return water temperature control mode; The basic control processing module of the intelligent valve 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 valve control processing on the corresponding constant temperature intelligent valve based on the basic control mode of the intelligent valve and in combination with the set temperature difference of the intelligent valve and 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 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 control work; The intelligent valve constant control processing module is used to perform valve constant control processing on the corresponding constant temperature intelligent valve based on the intelligent valve constant control mode and in combination with the intelligent valve set temperature difference and the intelligent valve set return water temperature, so as to execute the corresponding intelligent valve constant temperature difference control and constant return water temperature control control work.

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