Air energy equipment control system
By designing an air energy equipment control system, using sensors and PID control modules to achieve accurate control of the compressor, evaporator and condenser, the problem of delay and inaccurate temperature control of air energy equipment in the prior art is solved, and the accuracy of output temperature and system efficiency are improved.
Patent Information
- Application Number
- CN202510236154.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-04-18
AI Technical Summary
The existing air energy equipment controls the switches of each component through the controller and logic circuit, which has a functional delay and is prone to problems such as excessive or low output temperature.
An air energy equipment control system is designed, including a sensor module, a PID control module, a relay control module, a compressor, an evaporator, a condenser and a throttling device. The ambient temperature is detected by the sensor. The PID control module generates control signals based on the difference between the target temperature and the actual temperature, and adjusts the switch and opening of the throttling device and compressor equipment, so as to achieve more accurate temperature control.
By accurately controlling the opening of the switches and throttling devices of the compressor, evaporator and condenser, the effect of output temperature being closer to the actual temperature is achieved, avoiding the problem of excessive or low temperature, and improving the control accuracy and efficiency of the system.
Smart Images
Figure CN119844930A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of air energy equipment control, in particular to an air energy equipment control system. Background Art
[0002] Air energy refers to the low-grade thermal energy contained in the air and is a renewable energy source. Air energy equipment is mainly used to absorb heat from the air and transfer it to high-temperature objects or environments, such as dryers, hot air blowers, water heaters, air conditioners, etc. Existing air energy equipment mainly controls the switches of various components through controllers and logic circuits, which has functional delays and is prone to problems of output temperature being too high or too low. Summary of the invention
[0003] The technical problem to be solved by the present invention is that the existing air energy equipment mainly controls the switching of various components through a controller and a logic circuit, which causes functional delays and is prone to problems of excessively high or low output temperatures.
[0004] The present invention is to solve the above problems, and its specific scheme is:
[0005] An air energy equipment control system includes a sensor module, a PID control module, a relay control module, a compressor, an evaporator, a condenser and a throttling device. A closed loop is formed between the compressor, the condenser, the throttling device and the evaporator, and a refrigerant flows in the closed loop; the sensor module is connected to the PID control module, the sensor module is used to detect the actual temperature value in the environment, and transmit the actual temperature value to the PID control module, the PID control module is connected to the relay control module, a target temperature value is set in the PID control module, the PID control module generates a control signal according to the deviation value between the target temperature value and the actual temperature value, and sends it to the relay control module and the throttling device, the PID control module controls the opening of the throttling device according to the control signal, and the relay control module controls the switches of the compressor, the evaporator and the condenser according to the control signal.
[0006] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects:
[0007] The control system of the present invention absorbs heat from the air through a circulation loop of a compressor, an evaporator, a condenser and a throttling device, converts and transfers the heat, and transports it to a desired environment. The actual temperature value of the environment is detected by a sensor module, so that a PID control module calculates a deviation value according to the actual temperature value and a target temperature value, thereby adjusting a control signal. According to the control signal, the compressor is controlled by a relay control module to control the switches of the compressor, evaporator and condenser, and the opening of the throttling device is controlled by a PID controller, thereby making the output temperature closer to the actual temperature.
[0008] Preferably, a further technical solution of the present invention is:
[0009] The PID control module generates a control signal according to the difference between the target temperature and the actual temperature. Specifically, the PID algorithm calculates the control amount according to the difference between the target temperature and the actual temperature. The PID control module includes a PID controller, and the PID controller is equipped with a PID algorithm. The expression is:
[0010]
[0011] Among them, u(t) is the control value, e(t) is the deviation value, that is, the difference between the target temperature value and the actual temperature value, K p is the proportionality constant, K i is the integration time constant, K d is the differential time constant.
[0012] It also includes a power module, which supplies power to the PID control module, the relay control module, the compressor, the evaporator, the condenser and the throttling device.
[0013] The throttling device comprises an electronic expansion valve, which is arranged on a pipeline between a condenser and an evaporator. The electronic expansion valve is connected to a PID controller, and the PID controller controls the opening of the electronic expansion valve according to a calculated control amount.
[0014] The PID control module also includes a fuzzy controller, which is connected to the sensor module and is used to receive the actual temperature value detected by the sensor module, and calculate the deviation value e and the deviation change rate ec according to the difference between the actual temperature value and the target temperature value, and convert the deviation value e and the deviation change rate ec into a fuzzy temperature expression. Fuzzy rules are established in the fuzzy controller, and fuzzy reasoning is output by comparing the fuzzy temperature expression and the fuzzy rules, and the fuzzy reasoning is output to the PID controller to optimize the PID algorithm. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic diagram of component connections of an embodiment of the present invention;
[0016] Figure 2 It is a fuzzy controller optimization flow chart of an embodiment of the present invention. DETAILED DESCRIPTION
[0017] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.
[0018] See attached Figure 1-2The embodiment of the present invention discloses an air energy equipment control system, including a sensor module, a PID control module, a relay control module, a compressor, an evaporator, a condenser and a throttling device. A closed loop is formed between the compressor, the condenser, the throttling device and the evaporator, and a refrigerant flows in the closed loop; the sensor module is connected to the PID control module, the sensor module is used to detect the actual temperature value in the environment, and transmit the actual temperature value to the PID control module, the PID control module is connected to the relay control module, a target temperature value is set in the PID control module, the PID control module generates a control signal according to the deviation value between the target temperature value and the actual temperature value, and sends it to the relay control module and the throttling device, the PID control module controls the opening of the throttling device according to the control signal, and the relay control module controls the switches of the compressor, the evaporator and the condenser according to the control signal.
[0019] In this embodiment, the PID control module generates a control signal according to the difference between the target temperature and the actual temperature. Specifically, the PID algorithm adjusts the control amount according to the deviation value between the target temperature and the actual temperature, and generates a control signal through the control amount and transmits it to the relay control module. The PID control module includes a PID controller, and the PID controller is equipped with a PID algorithm, and the expression is:
[0020]
[0021] Among them, u(t) is the control value, e(t) is the deviation value, that is, the difference between the target temperature value and the actual temperature value, K p is the proportionality constant, K i is the integration time constant, K d is the differential time constant. The principle of PID algorithm is to adjust K p , K i and K d Three parameters make the system stable; among them, K i =K p *T / K i , K d =K p *K d / T.
[0022] In this embodiment, a power module is also included, and the power module supplies power to the PID control module, the relay control module, the compressor, the evaporator, the condenser and the throttling device.
[0023] In this embodiment, the PID control module also includes a fuzzy controller, which is connected to the sensor module and is used to receive the actual temperature value detected by the sensor module, and calculate the deviation value e and the deviation change rate ec according to the difference between the actual temperature value and the target temperature value, and convert the deviation value e and the deviation change rate ec into a fuzzy temperature expression. Fuzzy rules are established in the fuzzy controller, such as: "When the deviation value e is greater than 1, K p value plus 0.1, when the deviation change rate ec is greater than 10%, K p The value is added by 0.1", etc., and the fuzzy temperature expression and fuzzy rules are compared to output fuzzy reasoning, and the fuzzy reasoning is output to the PID controller to modify K p , K i and K d , thereby determining the fuzzy relationship between the three parameters of the PID controller and the deviation e and the deviation change rate ec, so that the PID controller automatically adjusts the operating frequency of the compressor and the opening degree of the throttling device to ensure the optimal performance of the system.
[0024] In this embodiment, pressure sensors are also provided on the high-pressure side and the low-pressure side of the compressor. The pressure sensors are connected to the relay control module. The pressure sensors are used to monitor the pressure on the high-pressure side and the low-pressure side of the compressor. When the pressure exceeds the normal range, the opening of the electronic expansion valve of the relay control module and the start and stop of the compressor are controlled to maintain the stability of the system pressure and prevent safety problems caused by abnormal pressure.
[0025] In this embodiment, the relay control module includes an electromagnetic relay, and the switches of the compressor, the evaporator and the condenser are controlled by the electromagnetic relay.
[0026] In this embodiment, the compressor adopts a high-efficiency scroll compressor, which significantly improves the compression efficiency and reduces energy consumption by optimizing the compression ratio. At the same time, new materials are used to enhance durability and performance, ensuring that the compressor operates stably under various working conditions. The working principle of the scroll compressor is to form multiple closed compression chambers through the meshing of the movable scroll and the static scroll. As the scroll rotates, the volume of the compression chamber gradually decreases to achieve gas compression. The compressor has the advantages of small size, light weight, low vibration, low noise, high efficiency, and good reliability. In the present invention, the innovative design of the compressor is reflected in the optimization of the scroll line design, which makes the compression process smoother and more efficient. At the same time, new composite materials are used to improve heat resistance and corrosion resistance. The evaporator adopts a fin-tube design, which greatly increases the heat exchange area, optimizes the air duct design, effectively prevents frosting, improves heat exchange efficiency, and ensures that the evaporator can maintain good performance even in low temperature environments. The evaporator is a key component in air energy equipment, which absorbs heat from the air to evaporate the refrigerant and realize heat energy transfer. In the present invention, the innovative design of the evaporator is reflected in the use of a new fin structure and an optimized air duct design, which makes the air flow smoother and the heat exchange efficiency higher. By controlling the surface temperature of the evaporator, frosting can be effectively prevented and the performance stability in a low temperature environment can be improved. The condenser adopts an efficient plate structure, strengthens the heat dissipation design, optimizes the flow channel, reduces energy consumption, improves stability, and ensures that the condenser can work efficiently and stably in a high temperature environment. The function of the condenser is to release the heat in the refrigerant to the outside air to achieve refrigerant condensation. In the present invention, the condenser adopts an efficient plate structure, which has the advantages of high heat transfer efficiency, low resistance, and light weight. By optimizing the flow channel design, the refrigerant flow is more uniform and the heat dissipation effect is better. The use of new heat dissipation materials and enhanced heat dissipation measures further improves the heat dissipation performance of the condenser, so that it can maintain a stable working state in a high temperature environment. The use of an electronic expansion valve can accurately control the refrigerant flow, adapt to different working conditions, significantly improve the system efficiency, and ensure that the system can maintain optimal performance under various operating conditions. The electronic expansion valve is arranged on the pipeline between the condenser and the evaporator. The electronic expansion valve is connected to the PID controller. The PID controller controls the opening of the electronic expansion valve according to the calculated control amount, controls the refrigerant flow and pressure, and adjusts the system operation state. In the present invention, the throttling device adopts an electronic expansion valve, which has the advantages of high control accuracy, fast response speed, wide adjustment range, etc.
[0027] In this embodiment, the sensor module uses a temperature and humidity sensor, which detects the actual temperature data in the working environment in real time through the temperature and humidity sensor, provides accurate data support, and ensures that the system can operate intelligently and adaptively. The actual temperature data is converted into the actual temperature value of the electrical signal after filtering and amplification by the signal processing circuit, and transmitted to the PID controller and the fuzzy controller.
[0028] The control system of the present invention absorbs heat from the air through a circulation loop of a compressor, an evaporator, a condenser and a throttling device, converts and transfers the heat, and transports it to a desired environment. The actual temperature value of the environment is detected by a sensor module, so that a PID control module calculates a deviation value according to the actual temperature value and a target temperature value, thereby adjusting a control signal. According to the control signal, the compressor is controlled by a relay control module to control the switches of the compressor, evaporator and condenser, and the opening of the throttling device is controlled by a PID controller, thereby making the output temperature closer to the actual temperature.
[0029] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.
Claims
1. An air energy equipment control system, comprising a sensor module, a PID control module, a relay control module, a compressor, an evaporator, a condenser and a throttling device, wherein a closed loop is formed between the compressor, the condenser, the throttling device and the evaporator, and a refrigerant flows in the closed loop; the sensor module is connected to the PID control module, the sensor module is used to detect the actual temperature value in the environment, and transmit the actual temperature value to the PID control module, the PID control module is connected to the relay control module, a target temperature value is set in the PID control module, the PID control module generates a control signal according to the deviation value between the target temperature value and the actual temperature value, and sends it to the relay control module and the throttling device, the PID control module controls the opening of the throttling device according to the control signal, and the relay control module controls the switches of the compressor, the evaporator and the condenser respectively according to the control signal.
2. The air energy equipment control system according to claim 1, characterized in that: The PID control module generates a control signal according to the difference between the target temperature and the actual temperature. Specifically, the PID algorithm calculates the control amount according to the difference between the target temperature and the actual temperature. The PID control module includes a PID controller, and the PID controller is equipped with a PID algorithm. The expression is: Among them, u(t) is the control value, e(t) is the deviation value, that is, the difference between the target temperature value and the actual temperature value, K p is the proportionality constant, K i is the integration time constant, K d is the differential time constant.
3. The air energy equipment control system according to claim 1, characterized in that: It also includes a power module, which supplies power to the PID control module, the relay control module, the compressor, the evaporator, the condenser and the throttling device.
4. The air energy equipment control system according to claim 2, characterized in that: The throttling device comprises an electronic expansion valve, which is arranged on a pipeline between a condenser and an evaporator. The electronic expansion valve is connected to a PID controller, and the PID controller controls the opening of the electronic expansion valve according to a calculated control amount.
5. The air energy equipment control system according to claim 1, characterized in that: The PID control module also includes a fuzzy controller, which is connected to the sensor module and is used to receive the actual temperature value detected by the sensor module, and calculate the deviation value e and the deviation change rate ec according to the difference between the actual temperature value and the target temperature value, and convert the deviation value e and the deviation change rate ec into a fuzzy temperature expression. Fuzzy rules are established in the fuzzy controller, and fuzzy reasoning is output by comparing the fuzzy temperature expression and the fuzzy rules, and the fuzzy reasoning is output to the PID controller to optimize the PID algorithm.