Water mixing heat exchange system hydraulic working condition decoupling and water pump cooperative control device and method

Abstract

The invention provides a hydraulic working condition decoupling and water pump cooperative control device and method for a water mixing heat exchange system. The hydraulic working condition decoupling and water pump cooperative control device comprises a sensor assembly, an electric control valve, a water pump, a hydraulic working condition decoupling controller and a water pump controller. The output end of the water pump controller is connected with the water pump, the input end of the water pump operation controller is connected with the output end of the hydraulic working condition decoupling controller, the input end of the hydraulic working condition decoupling controller is connected with the sensor assembly, and the output end of the hydraulic working condition decoupling controller is in communication connection with the electric adjusting valve. By monitoring system load and energy consumption data in real time and intelligently adjusting the rotating speed of the water pump, maximum utilization of energy is achieved, the system can enter an energy-saving mode on the premise that the operation requirement of the system is met, and energy consumption of the water pump and equipment is reduced; through an intelligent control algorithm, the system can realize automatic operation, the dependence on operators is reduced, and the problems of unstable hydraulic working condition, low energy efficiency, complex operation and the like in an existing water mixing heat exchange system are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating, ventilation and air conditioning, and in particular to a device and method for hydraulic condition decoupling and water pump coordinated control of a mixed water heat exchange system. Background Art

[0002] Mixed water heat exchange systems play an important role in modern construction, industrial production and heating. These systems use water as a heat transfer medium to transfer heat between different media, such as using hot water for heating or air conditioning. However, the stability and efficiency of mixed water heat exchange systems are affected by many factors, among which the instability of hydraulic conditions is one of the key factors affecting system performance. Specifically, it manifests itself in the following aspects: Due to the instability of water pump operation, changes in system load or changes in resistance in the pipeline, the pressure in the system will continue to fluctuate, which may cause water flow in the system to be blocked and affect the heat exchange effect. Improper system design, pipeline layout or valve adjustment may cause the flow rate in some areas of the system to be less than that in other areas, resulting in reduced heat exchange efficiency. As the system runs longer, the internal resistance of the pipeline and equipment will increase due to dirt accumulation, corrosion and other reasons, resulting in increased head loss and further reducing system efficiency.

[0003] Although the existing mixed water heat exchange system control methods have achieved certain results, there are still some problems: the traditional method is difficult to achieve accurate hydraulic condition control, resulting in high system energy efficiency and operating costs. The system responds slowly to changes in operating conditions and cannot be adjusted in time to adapt to changes. The system cannot automatically adjust parameters according to actual operating conditions and lacks self-optimization capabilities. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention aims to provide a device and method for decoupling the hydraulic working conditions and coordinating the control of water pumps in a mixed water heat exchange system, aiming to solve the problems of unstable hydraulic working conditions, low energy efficiency and complex operation in the existing mixed water heat exchange system. Improving the energy efficiency of the mixed water heat exchange system is of great significance for saving energy and reducing the environmental burden. The purpose of the present invention is to achieve maximum utilization of energy by intelligently adjusting the speed of the water pump by real-time monitoring of the system load and energy consumption data. Under the premise of ensuring the system operation requirements, the system can enter the energy-saving mode to reduce the energy consumption of the water pump and equipment. Through the intelligent control algorithm, the system can realize automatic operation and reduce dependence on operators.

[0005] The present invention is achieved through the following technical solutions: The hydraulic condition decoupling and water pump coordinated control device of the mixed water heat exchange system includes: Sensor components, electric regulating valves, water pumps, hydraulic condition decoupling controllers and water pump controllers; The output end of the water pump controller is connected to the water pump, the input end of the water pump operation controller is connected to the output end of the hydraulic condition decoupling controller, the input end of the hydraulic condition decoupling controller is connected to the sensor component, and the output end of the hydraulic condition decoupling controller is connected to the electric regulating valve for communication; The sensor assembly is used to obtain data on the temperature, flow rate and pressure of the pipeline fluid in the mixed water heat exchange system; The hydraulic condition decoupling controller is used to analyze the data of the pipeline fluid to obtain the optimal hydraulic condition control instructions to control the operating parameters of the mixed water heat exchange system to achieve dynamic decoupling of the hydraulic condition; The water pump operation controller is used to adjust the speed of the water pump based on the instructions of the hydraulic condition decoupling controller to optimize the water pump operation.

[0006] Preferably, the electric regulating valves are respectively arranged at the inlet and outlet of the mixed water heat exchanger in the mixed water heat exchange system and on the user's water inlet pipe; the water pump is arranged on the mixing water pipe in the mixed water heat exchange system.

[0007] Preferably, the sensor components are respectively arranged on the water inlet pipe and the water outlet pipe of the mixing water heat exchanger in the mixing water heat exchange system and the user's water inlet pipe.

[0008] Preferably, the hydraulic condition decoupling controller is arranged between the mixed water pipeline and the water supply pipe and the return pipe of the heating network.

[0009] Preferably, it also includes a data acquisition and processing module for preprocessing the data collected by the sensor component, including data filtering to remove noise and abnormal values.

[0010] Preferably, the hydraulic condition decoupling controller realizes dynamic decoupling of hydraulic conditions by utilizing an adaptive control algorithm and a fuzzy logic control algorithm.

[0011] Preferably, it also includes a user interface and a management module for providing an intuitive operation interface, allowing operators to monitor the status of the mixed water heat exchange system, receive alarm information and configure the mixed water heat exchange system.

[0012] Preferably, the sensor assembly includes a flow sensor, a pressure sensor and a temperature difference sensor; The temperature sensor is used to detect the temperature of the mixed fluid in the mixed water heat exchange system, the flow sensor is used to detect the fluid flow in the pipeline in the mixed water heat exchange system, and the pressure sensor is used to detect the inlet and outlet pressures of the mixed water heat exchanger; the sensor assembly also includes a temperature difference sensor, which is used to measure the temperature difference in the mixed water heat exchange system to determine the heat exchange efficiency.

[0013] Preferably, the parameters of the mixed water heat exchange system include the opening of the electric regulating valve and the speed of the water pump. A method for decoupling hydraulic conditions and coordinating water pump control in a mixed water heat exchange system includes: Start the water pump to transport the fluid in the cold and hot water sources and the mixed water heat exchanger to each device in the mixed water heat exchange system, and use the sensor component to detect the temperature, flow and pressure data of the fluid in the pipeline in real time; and feed back to the hydraulic condition decoupling controller. The hydraulic condition decoupling controller decouples the mixed water heat exchange system in real time according to the temperature, flow and pressure data to obtain the optimal hydraulic condition control instructions; the water pump controller adjusts the speed and start and stop of the water pump according to the decoupling control instructions of the hydraulic condition decoupling controller through the PID controller control strategy to achieve coordinated control of the water pump; according to the decoupling control instructions of the hydraulic condition decoupling controller, control and adjust the opening of the electric regulating valve. During the operation of the mixed water heat exchange system, the hydraulic condition decoupling controller continuously updates the decoupling control instructions, and the water pump controller adjusts the operating status of the water pump in real time to ensure that the system operates in the optimal condition.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention aims to provide a device for hydraulic condition decoupling and water pump coordinated control of an intelligent mixed water heat exchange system, aiming to solve the problems of unstable hydraulic conditions, low energy efficiency and complex operation in the existing mixed water heat exchange system. Improving the energy efficiency of the mixed water heat exchange system is of great significance for saving energy and reducing the environmental burden. The purpose of the present invention is to achieve maximum energy utilization by intelligently adjusting the water pump speed through real-time monitoring of system load and energy consumption data. Under the premise of ensuring the system operation requirements, the system can enter energy-saving mode to reduce the energy consumption of water pumps and equipment. Through intelligent control algorithms, the system can achieve automatic operation and reduce dependence on operators.

[0015] Furthermore, the hydraulic condition decoupling controller realizes dynamic decoupling and intelligent control of hydraulic conditions by combining adaptive control algorithm and fuzzy logic control algorithm. This combination not only improves the stability and control effect of the system, but also enhances the flexibility and adaptability of the system; Furthermore, by integrating smart sensors, the system can monitor hydraulic parameters (such as flow, pressure and temperature) in real time to ensure that the system is always operating in the best condition; Furthermore, the system can dynamically identify and resolve hydraulic imbalances through advanced data analysis and adaptive control algorithms, thus avoiding degradation of system performance caused by hydraulic imbalances; Furthermore, the system intelligently adjusts the operating status of the water pump based on real-time data and preset strategies to maximize energy utilization and effectively reduce system energy consumption; Furthermore, during low-load or off-peak hours, the system can automatically switch to energy-saving mode to reduce unnecessary energy consumption; Furthermore, by analyzing historical data and real-time monitoring, the system can predict potential problems, perform maintenance in advance, and avoid energy waste due to equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the hydraulic condition decoupling and water pump coordinated control device of the mixed water heat exchange system; In the figure: water pump 1, sensor assembly 2, electric control valve 3. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0018] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] The hydraulic condition decoupling and water pump coordinated control device of the intelligent mixed water heat exchange system designed by the present invention is an integrated system, which includes the following technical features: the intelligent sensor component is the perception layer of the system, which is composed of various sensors, including but not limited to water temperature sensors, which monitor the water temperature changes in the system to ensure the heat exchange effect; flow sensors, which measure the water flow through the pipeline, are used to evaluate the energy efficiency of the system; pressure sensors, which monitor the pressure changes in the system, are used to analyze the hydraulic conditions; temperature difference sensors, which measure the temperature difference in the system, are used to judge the heat exchange efficiency. The data acquisition and processing module is responsible for preprocessing the data collected by the sensor network, including data filtering to remove noise and outliers to ensure data quality. Key features are extracted from the raw data for subsequent analysis.

[0020] The hydraulic condition decoupling controller is the core part of the system. It uses adaptive control algorithms and fuzzy logic control to achieve dynamic decoupling of hydraulic conditions. Hydraulic condition decoupling controller: According to the data analysis results, the operating parameters of the system are controlled to achieve dynamic decoupling of hydraulic conditions. The main functions of the controller are to identify the hydraulic imbalance mode in the system, adjust the system parameters such as valve opening, pump speed, etc. according to the analysis results, realize real-time monitoring and control of hydraulic conditions, and ensure stable operation of the system. The pump operation controller adjusts the speed of the pump based on the instructions of the hydraulic condition decoupling controller to optimize the operation of the pump. At the same time, a user interface and management system are established to provide an intuitive operation interface, allowing operators to monitor the system status, receive alarm information and configure the system.

[0021] The hydraulic condition decoupling controller realizes dynamic decoupling and intelligent control of hydraulic conditions by combining adaptive control algorithm and fuzzy logic control algorithm; this combination not only improves the stability and control effect of the system, but also enhances the flexibility and adaptability of the system.

[0022] Equipment of the mixed water heat exchange system: including electric regulating valve: used to adjust the flow and direction of hot water, which is a key component for achieving mixed water heat exchange. Circulating water pump: provides power to circulate hot water in the system to ensure that the heat can be evenly distributed. Controller: controls the opening of the electric regulating valve according to the data collected by the sensor component, thereby adjusting the water supply temperature. Sensor component: monitors the temperature of the water supply, return water and other key parts of the system in real time, and provides data support for the controller.

[0023] In the mixed water heat exchange system, hydraulic decoupling is mainly achieved through a coupling tank (also called a hydraulic separator, hydraulic balancer, pressure equalizer, mixing tank, etc.). The basic structure of the coupling tank is a long cylindrical container with an opening on the top. One side is connected to the primary water circuit from the boiler side, and the other side is connected to one or more secondary water circuits at the user end. An exhaust valve is set on the top for gas-water separation, and a drain valve is set at the bottom for impurity separation. The functions of the coupling tank mainly include: Hydraulic separation: Separate the water circulation on the primary side and the secondary side to avoid mutual interference. Pressure loss control: Create an area with almost zero pressure loss between the primary side and the secondary side, so that the circulation of each circuit does not interfere with each other. Mixed water regulation: The primary water and the secondary water are mixed in the coupling tank, and the water temperature is regulated by adjusting the flow of each circuit.

[0024] In the mixed water heat exchange system, the coordinated control of the water pump is mainly achieved through the following methods: Water pump controller: connected to the water pump, used to control the start and stop and speed of the water pump to achieve coordinated work of the water pump.

[0025] Hydraulic condition decoupling controller: used to monitor the working status of the water pump and system requirements in real time, and adjust the working parameters of the water pump according to the requirements.

[0026] The components of this patented device include: electric regulating valve, water pump, cold and hot water source pipes and mixed water heat exchanger, temperature sensor is used to detect the temperature of mixed fluid, flow sensor is used to detect fluid flow, pressure sensor is used to detect the inlet and outlet pressure of mixed water heat exchanger. Hydraulic condition decoupling controller decouples the system in real time, water pump controller adjusts the speed and start and stop of water pump to realize coordinated control of water pump.

[0027] The patented device Figure 1 as follows: The cold and hot water sources include the water supply from the thermal power station and the return water from the user side. The sensor assembly 2 is located at the mixed water outlet and has temperature, pressure and flow sensors. The hydraulic condition decoupling controller includes a microprocessor or controller, an algorithm library, and a sensor data input interface. The regulating valve 3 is located in the cold and hot water pipes before mixing. The mixing water pump 1 includes a water pump body, a drive motor, an inlet and outlet valves, and a connection line with the start module.

[0028] When the system starts, the water pump starts to transport the fluids in the cold and hot water sources and the mixed water heat exchanger to each device. The temperature sensor detects the temperature of the mixed fluid in real time, the flow sensor detects the fluid flow, and the pressure sensor detects the inlet and outlet pressures of the mixed water heat exchanger. The hydraulic condition decoupling controller decouples the system in real time based on temperature, flow, pressure and other data through neural networks and other methods to obtain the optimal hydraulic condition control instructions. The water pump controller adjusts the speed and start and stop of the water pump according to the instructions of the decoupling controller through the PID controller control strategy to achieve coordinated control of the water pump. During the operation of the system, the hydraulic condition decoupling controller continuously updates the decoupling control instructions, and the water pump controller adjusts the operating status of the water pump in real time to ensure that the system operates in the optimal condition. During low load or off-peak hours, the mixed water heat exchange system can automatically switch to energy-saving mode to reduce unnecessary energy consumption; the mixed water heat exchange system intelligently adjusts the operating status of the water pump based on real-time data and preset strategies to maximize energy utilization and effectively reduce the energy consumption of the mixed water heat exchange system; the mixed water heat exchange system intelligently adjusts the operating status of the water pump based on real-time data and preset strategies to maximize energy utilization and effectively reduce the energy consumption of the mixed water heat exchange system; The mixed water heat exchange system of the present invention can dynamically identify and resolve hydraulic imbalance through advanced data analysis and adaptive control algorithms, thereby avoiding system performance degradation caused by hydraulic imbalance; Among them, the adaptive control algorithm is a method that can automatically adjust the control parameters according to the system status and environmental changes; The adaptive control algorithm can monitor various parameters of hydraulic conditions, such as flow rate, pressure, etc., in real time, and automatically adjust the control strategy according to the real-time changes of these parameters.

[0029] Through real-time monitoring and analysis of system parameters, the adaptive control algorithm can automatically adjust the controller parameters, such as gain, integral time, etc., to optimize the control effect.

[0030] There are various uncertainties in hydraulic conditions, such as changes in pipe resistance, fluctuations in pump performance, etc. Adaptive control algorithms can effectively deal with these uncertainties and maintain system stability and control effects.

[0031] Fuzzy logic control algorithm is a control method based on fuzzy sets and fuzzy reasoning, which is particularly suitable for dealing with complex, nonlinear systems that are difficult to model accurately.

[0032] Convert the precise measurements of hydraulic conditions into fuzzy sets for fuzzy reasoning. This step is usually achieved by defining membership functions to map continuous input variables to specific regions of the fuzzy sets. According to the rules in the fuzzy rule base, fuzzy reasoning is performed on the input variables to obtain the control output. The fuzzy rule base consists of a series of "if-then" rules that reflect expert knowledge or empirical relationships learned from data.

[0033] In a multivariable hydraulic system, the fuzzy logic control algorithm can be designed to handle each subsystem independently so that the control variable of each subsystem is not affected by other variables. This can be achieved by building multiple independent fuzzy controllers, each of which performs fuzzy control on a specific variable.

[0034] In order to improve the overall performance of the system, the rule base of the fuzzy logic control algorithm can be adjusted and optimized. For example, rules can be added or modified, the shape of the membership function can be adjusted, etc., to better adapt to the dynamic changes of the system.

[0035] The present invention combines adaptive control with fuzzy logic control: In the hydraulic condition decoupling controller, the combination of adaptive control algorithm and fuzzy logic control algorithm can achieve more flexible and effective control. On the one hand, the adaptive control algorithm can automatically adjust the control parameters according to the changes in the system state to maintain the stability and control effect of the system; on the other hand, the fuzzy logic control algorithm can handle complex, nonlinear and difficult to accurately model hydraulic condition systems, achieving more accurate and intelligent control.

[0036] By combining the adaptive control algorithm, the parameters of the fuzzy logic control algorithm are adjusted and optimized in real time. According to the real-time monitoring results of the system status, the rules or the shape of the membership function in the fuzzy rule base are adaptively adjusted to better adapt to the dynamic changes of the system. At the same time, the fuzzy logic control algorithm can also be used to optimize and improve the control strategy of the adaptive control algorithm to improve the overall performance and robustness of the system.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. Hydraulic condition decoupling and water pump coordinated control device for mixed water heat exchange system, characterized in that: include, Sensor components, electric regulating valves, water pumps, hydraulic condition decoupling controllers and water pump controllers; The output end of the water pump controller is connected to the water pump, the input end of the water pump operation controller is connected to the output end of the hydraulic condition decoupling controller, the input end of the hydraulic condition decoupling controller is connected to the sensor component, and the output end of the hydraulic condition decoupling controller is connected to the electric regulating valve for communication; The sensor assembly is used to obtain data on the temperature, flow rate and pressure of the pipeline fluid in the mixed water heat exchange system; The hydraulic condition decoupling controller is used to analyze the data of the pipeline fluid to obtain the optimal hydraulic condition control instructions to control the operating parameters of the mixed water heat exchange system to achieve dynamic decoupling of the hydraulic condition; The water pump operation controller is used to adjust the speed of the water pump based on the instructions of the hydraulic condition decoupling controller to optimize the water pump operation.

2. The device for hydraulic condition decoupling and water pump coordinated control of a mixed water heat exchange system according to claim 1, characterized in that: The electric regulating valves are respectively arranged at the inlet and outlet of the mixed water heat exchanger in the mixed water heat exchange system and on the user's water inlet pipe; the water pump is arranged on the mixed water pipe in the mixed water heat exchange system.

3. The device for hydraulic condition decoupling and water pump coordinated control of a mixed water heat exchange system according to claim 1, characterized in that: The sensor components are respectively arranged on the water inlet pipe and the water outlet pipe of the mixing water heat exchanger in the mixing water heat exchange system and the user's water inlet pipe.

4. The device for hydraulic condition decoupling and water pump coordinated control of a mixed water heat exchange system according to claim 1, characterized in that: The hydraulic working condition decoupling controller is arranged between the water mixing pipeline and the water supply pipe and the water return pipe of the heating network.

5. The device for hydraulic condition decoupling and water pump coordinated control of a mixed water heat exchange system according to claim 1, characterized in that: It also includes a data acquisition and processing module for pre-processing the data collected by the sensor component, including data filtering to remove noise and outliers.

6. The device for hydraulic condition decoupling and water pump coordinated control of a mixed water heat exchange system according to claim 1, characterized in that: The hydraulic operating condition decoupling controller realizes dynamic decoupling of hydraulic operating conditions by utilizing an adaptive control algorithm and a fuzzy logic control algorithm.

7. The device for hydraulic condition decoupling and water pump coordinated control of a mixed water heat exchange system according to claim 1, characterized in that: It also includes a user interface and a management module for providing an intuitive operating interface, allowing operators to monitor the status of the mixed water heat exchange system, receive alarm information, and configure the mixed water heat exchange system.

8. The device for hydraulic condition decoupling and water pump coordinated control of a mixed water heat exchange system according to claim 1, characterized in that: The sensor assembly includes a flow sensor, a pressure sensor and a temperature difference sensor; The temperature sensor is used to detect the temperature of the mixed fluid in the mixed water heat exchange system, the flow sensor is used to detect the fluid flow in the pipeline in the mixed water heat exchange system, and the pressure sensor is used to detect the inlet and outlet pressures of the mixed water heat exchanger; the sensor assembly also includes a temperature difference sensor, which is used to measure the temperature difference in the mixed water heat exchange system to determine the heat exchange efficiency.

9. The device for hydraulic condition decoupling and water pump coordinated control of a mixed water heat exchange system according to claim 1, characterized in that: The parameters of the mixed water heat exchange system include the opening of the electric regulating valve and the speed of the water pump.

10. A method for decoupling hydraulic conditions and coordinating water pumps for a mixed water heat exchange system, based on the device for decoupling hydraulic conditions and coordinating water pumps for a mixed water heat exchange system according to any one of claims 1 to 9, characterized in that: include, Start the water pump to transport the fluid in the cold and hot water sources and the mixed water heat exchanger to each device in the mixed water heat exchange system, and use the sensor component to detect the temperature, flow and pressure data of the fluid in the pipeline in real time; and feed back to the hydraulic condition decoupling controller. The hydraulic condition decoupling controller decouples the mixed water heat exchange system in real time according to the temperature, flow and pressure data to obtain the optimal hydraulic condition control instructions; the water pump controller adjusts the speed and start and stop of the water pump according to the decoupling control instructions of the hydraulic condition decoupling controller through the PID controller control strategy to achieve coordinated control of the water pump; according to the decoupling control instructions of the hydraulic condition decoupling controller, control and adjust the opening of the electric regulating valve. During the operation of the mixed water heat exchange system, the hydraulic condition decoupling controller continuously updates the decoupling control instructions, and the water pump controller adjusts the operating status of the water pump in real time to ensure that the system operates in the optimal condition.

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