Expansion valve control method and system considering the configuration settings of an air-source heat pump.

Abstract

This invention provides an expansion valve control method and system that improves the control accuracy of the expansion valve, taking into account the configuration settings of an air-source heat pump. [Solution] The method includes the steps of: acquiring ambient temperature, condensation side inlet water temperature, outlet water temperature and water mass flow rate, as well as compressor frequency, exhaust temperature and exhaust pressure; calculating and determining theoretical evaporation temperature, theoretical condensation temperature and actual exhaust superheat based on the acquired data and configuration setting parameters of the air heat source heat pump; calculating the temperature deviation between the compressor exhaust temperature and the exhaust alarm limit temperature; if the temperature deviation is greater than or equal to a set temperature deviation threshold, calculating and determining a target exhaust superheat based on the compressor frequency, theoretical evaporation temperature, theoretical condensation temperature and target exhaust superheat calculation model; and performing exhaust superheat control on the expansion valve based on the target exhaust superheat and actual exhaust superheat.

Description

[Technical Field]

[0001] (Cross-reference of related applications) This invention claims priority to the Chinese patent application No. 202411715848.2, titled "Method and System for Controlling an Expansion Valve Considering the Configuration Settings of an Air Heat Source Heat Pump," filed with the China National Intellectual Property Administration on November 27, 2024, and all its contents are incorporated into this invention by reference for all purposes and constitute part of this invention.

[0002] The present invention relates to the technical field of expansion valve control for air-source heat pumps, and more particularly to an expansion valve control method and system that take into account the configuration settings of an air-source heat pump. [Background technology]

[0003] This section provides only background information related to the present invention and does not necessarily constitute prior art.

[0004] In recent years, air-source heat pumps have attracted unprecedented attention in the construction sector as an efficient, energy-saving, and clean energy technology. Compared to conventional heating methods such as coal combustion, air-source heat pumps offer significant energy-saving and environmental benefits, making them an important technology for achieving clean heating, peak reduction of carbon dioxide emissions, and carbon neutrality.

[0005] In air-source heat pump systems, the electronic expansion valve is a critical component whose precise control directly impacts the system's energy efficiency and stability, making it a crucial element in ensuring the safe and efficient operation of the air-source heat pump. Conventional electronic expansion valve control policies typically target the compressor's suction superheat. However, at low ambient temperatures, the suction superheat decreases, increasing the demand for precision at the measurement point and making control more difficult. This can lead to oscillation phenomena in the system, resulting in large errors during control and a decrease in the energy efficiency of the equipment unit's operation.

[0006] In contrast, controlling the opening degree of the expansion valve based on exhaust superheat does not require high precision at the measurement point, and therefore effectively solves the system oscillation problem that occurs when controlling based on intake superheat. However, the exhaust superheat of the compressor is limited not only by the compressor frequency, ambient temperature, and feedwater temperature, but also by the configuration setting parameters of the air-source heat pump, including the heat exchange area of ​​the evaporator, the stroke volume of the compressor, the airflow rate of the fan, the heat exchange coefficient of the condenser, and the heat exchange area on the condensing side. These configuration setting parameters affect the exhaust superheat by influencing the evaporation and condensation temperatures. However, none of the related technologies take into account the influence of the configuration setting parameters of the air-source heat pump when controlling the expansion valve for exhaust superheat, resulting in relatively low control accuracy for the expansion valve. [Overview of the project]

[0007] To solve the above problems, the present invention proposes an expansion valve control method and system that considers the configuration settings of an air-source heat pump, constructs an exhaust superheat target calculation model that takes into account the configuration setting parameters of the air-source heat pump, and improves the control accuracy of the expansion valve by taking into account the configuration setting parameters of the air-source heat pump when controlling the expansion valve.

[0008] To achieve the above objectives, the present invention employs the following technical solution. In the first embodiment, there is an expansion valve control method that takes into account the configuration settings of an air heat source heat pump, The steps include obtaining the ambient temperature, the inlet water temperature and outlet water temperature on the condensing side, the mass flow rate of the water, and the frequency, exhaust temperature, and exhaust pressure of the compressor, The steps include: calculating the theoretical evaporation temperature and theoretical condensation temperature according to the theoretical evaporation temperature model and theoretical condensation temperature model, based on the acquired data and the configuration setting parameters of the air heat source heat pump; The steps include: calculating the actual condensation temperature based on the compressor's exhaust pressure and refrigerant property parameters, and calculating the actual exhaust superheat based on the actual condensation temperature; A step of calculating the temperature deviation between the compressor exhaust temperature and the exhaust alarm limit temperature, If the temperature deviation is greater than or equal to a set temperature deviation threshold, the step of calculating and determining the target exhaust superheat according to a target exhaust superheat calculation model based on the compressor frequency, theoretical evaporation temperature, and theoretical condensation temperature, wherein the target exhaust superheat calculation model is fitted with existing compressor sample data including theoretical evaporation temperature, compressor frequency, theoretical condensation temperature, and corresponding target exhaust superheat; A step of controlling the exhaust superheat of the expansion valve based on the target exhaust superheat and the actual exhaust superheat, We propose an expansion valve control method that takes into account the configuration settings of an air-source heat pump, including the air source heat pump.

[0009] Furthermore, the process of controlling the exhaust superheat level of the expansion valve based on the target exhaust superheat level and the actual exhaust superheat level is as follows: Calculating the superheat error between the actual exhaust superheat and the target exhaust superheat, This includes, if the superheat error exceeds a set superheat error threshold, performing PID control on the expansion valve based on the target exhaust superheat, and if the superheat error is below the set superheat error threshold, allowing the system to continue stable operation.

[0010] Furthermore, if the temperature deviation is below a set temperature deviation threshold, PID control is applied to the expansion valve based on the target exhaust temperature.

[0011] Furthermore, the target exhaust superheat calculation model is expressed by the following formula:

number

[0012] Furthermore, the theoretical evaporation temperature model is expressed by the following equation:

number

Equation

[0013] Furthermore, the actual exhaust superheat degree is equal to the value obtained by subtracting the actual condensation temperature from the exhaust temperature of the compressor.

[0014] In the second aspect, it is an expansion valve control system considering the configuration settings of an air source heat pump, a data acquisition module for acquiring the ambient temperature, the inlet water temperature, the outlet water temperature and the mass flow rate of water on the condensation side, as well as the frequency, the exhaust temperature and the exhaust pressure of the compressor, a theoretical temperature and actual exhaust superheat degree calculation module for calculating the theoretical evaporation temperature and the theoretical condensation temperature according to the theoretical evaporation temperature model and the theoretical condensation temperature model based on the acquired data and the configuration setting parameters of the air source heat pump, calculating the actual condensation temperature based on the exhaust pressure of the compressor and the refrigerant physical property parameters, and calculating the actual exhaust superheat degree based on the actual condensation temperature, a temperature deviation calculation module for calculating the temperature deviation between the exhaust temperature of the compressor and the exhaust alarm limit temperature, A target exhaust superheat calculation module for calculating and determining the target exhaust superheat according to a target exhaust superheat calculation model based on the compressor frequency, theoretical evaporation temperature, and theoretical condensation temperature when the temperature deviation is greater than or equal to a set temperature deviation threshold, wherein the target exhaust superheat calculation model is fitted with existing compressor sample data including theoretical evaporation temperature, compressor frequency, theoretical condensation temperature, and corresponding target exhaust superheat; An expansion valve control module for controlling the exhaust superheat of the expansion valve based on the target exhaust superheat and the actual exhaust superheat, We propose an expansion valve control system that takes into account the configuration settings of an air-source heat pump equipped with this system.

[0015] In the third aspect, a processor suitable for executing a computer program, A computer-readable storage medium in which a computer program is stored, wherein when the computer program is executed by the processor, an expansion valve control method that takes into account the configuration settings of the air heat source heat pump proposed in the first embodiment is realized. We propose computer equipment including [specific components / devices].

[0016] In the fourth aspect, a computer-readable storage medium is proposed that stores a computer program, which is loaded by a processor and is suitable for executing an expansion valve control method that takes into account the configuration settings of the air-source heat pump proposed in the first aspect.

[0017] In the fifth embodiment, we propose a computer program product that includes a computer program, and when the computer program is executed by a processor, an expansion valve control method that takes into account the configuration settings of the air heat source heat pump proposed in the first embodiment is realized.

[0018] Compared to the prior art, the present invention has the following beneficial effects.

[0019] This invention proposes an expansion valve control method and system that takes into account the configuration settings of an air-source heat pump. The method acquires the ambient temperature, the inlet water temperature and outlet water temperature and water mass flow rate on the condensing side, as well as the compressor frequency, exhaust temperature and exhaust pressure. Furthermore, based on the acquired data and the configuration setting parameters of the air-source heat pump, the theoretical evaporation temperature, theoretical condensation temperature and actual exhaust superheat are calculated and determined. Subsequently, the temperature deviation between the compressor exhaust temperature and the exhaust alarm limit temperature is calculated. If the temperature deviation is greater than or equal to a set temperature deviation threshold, the target exhaust superheat is calculated and determined, and exhaust superheat control is performed on the expansion valve. By taking into account the configuration setting parameters of the air-source heat pump when controlling the expansion valve, the control accuracy of the expansion valve is improved, system oscillation is prevented, and the safe and efficient operation of the equipment unit is ensured.

[0020] Further advantages of the present invention are, in part, shown in the following description, in part, apparent from the following description, or understood through the practice of the present invention. [Brief explanation of the drawing]

[0021] The drawings accompanying the specification, which constitute part of this application, are provided for further understanding of this application, and the exemplary embodiments and descriptions herein are for interpretive purposes only and do not unduly limit this application.

[0022] [Figure 1] This is a flowchart of an expansion valve control method considering the configuration settings of the air-source heat pump disclosed in the embodiment. [Modes for carrying out the invention]

[0023] The present invention will be further described below with reference to the attached drawings and examples.

[0024] It should be noted that the following detailed descriptions are all illustrative and intended to further illustrate this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application pertains.

[0025] It should be noted that the terms used herein are for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments provided herein. Where used herein, the singular form is intended to include the plural form unless the context explicitly states otherwise. Furthermore, where the terms “includes” and / or “equipment” are used herein, it should be understood that they indicate features, steps, operations, devices, assemblies and / or combinations thereof.

[0026] Example 1 During operation of an air-source heat pump system, the exhaust pressure is typically high, and the exhaust superheat value is greater than the intake superheat value. Therefore, controlling the opening of the expansion valve based on the exhaust superheat can reduce the accuracy requirements of the measurement point and the difficulty of control, thereby improving the system's operating performance. However, none of the related technologies take into account the influence of the configuration parameters of the air-source heat pump when controlling the expansion valve based on exhaust superheat, resulting in relatively low control accuracy for the expansion valve.

[0027] To improve the control accuracy of the expansion valve, this embodiment discloses an expansion valve control method that takes into account the configuration settings of an air-source heat pump. As shown in Figure 1, this method includes the following steps.

[0028] S1: Obtain the ambient temperature, the inlet water temperature and outlet water temperature on the condensing side, the mass flow rate of the water, and the compressor frequency, exhaust temperature, and exhaust pressure.

[0029] In this embodiment, the temperature T of the environment where the air-source heat pump is located aThe inlet water temperature t1, outlet water temperature t2, and mass flow rate m of the condensing side, as well as the compressor frequency n and exhaust temperature T out and exhaust pressure P con By acquiring this data in real time, the expansion valve is adjusted and controlled.

[0030] S2: Based on the acquired data and the configuration settings parameters of the air-source heat pump, the theoretical evaporation temperature and theoretical condensation temperature are calculated according to the theoretical evaporation temperature model and theoretical condensation temperature model. The actual condensation temperature is calculated based on the compressor exhaust pressure and refrigerant property parameters, and the actual exhaust superheat is calculated based on the actual condensation temperature.

[0031] Here, the configuration setting parameters for the air-source heat pump are the outdoor heat exchange area F on the evaporation side. e The rated airflow G of the outdoor fan, the stroke volume V0 of the compressor, the heat exchange coefficient K on the condensing side, and the heat exchange area F on the condensing side. c Includes F e 0-1500m 2 It can be said that G is 0-200m 3 It can also be expressed as / s, and V0 can be obtained by examining the compressor sample, ranging from 0 to 0.3 m 3 It can also be written as / rev, and K is 0~2000W / (m 2 It may also be written as ·K) F c 0-1500m 2 It may be done this way.

[0032] In this embodiment, the ambient temperature T a The compressor frequency n, and the rated airflow G of the outdoor fan and the evaporation side heat exchange area F are among the configuration setting parameters of the air heat source heat pump. e Based on the compressor stroke volume V0 and the theoretical evaporation temperature model, the theoretical evaporation temperature T e This is calculated and determined. Here, the theoretical evaporation temperature model is estimated based on the ASHP frost suppression semi-empirical model and is expressed by the following equation.

[0033]

number

[0034] The mass flow rate of water on the condensing side (m), the inlet water temperature (t1) and outlet water temperature (t2) on the condensing side, and the heat exchange area (F) of the air heat source heat pump configuration parameters. c And the heat exchange coefficient K on the condensation side, and based on the theoretical condensation temperature model, the theoretical condensation temperature T c This is calculated and determined. The theoretical condensation temperature model is estimated based on the equation for the logarithmic heat exchange temperature difference on the condensation side and is expressed by the following equation.

[0035]

number

[0036] Actual exhaust superheating degree T dsh The exhaust temperature of the compressor is T out From the actual condensation temperature T c,actual It is equal to the value obtained by subtracting the actual condensation temperature T. c,actual P is the exhaust pressure of the compressor. con It is determined by the following: Specifically, it is as follows:

[0037] T c,actual This is equal to the saturation temperature corresponding to the exhaust pressure of the refrigerant compressor, and is calculated based on the compressor's exhaust pressure and the refrigerant's physical properties.

[0038]

number

[0039] S3: Calculate the temperature deviation between the exhaust temperature of the compressor and the exhaust warning limit temperature.

[0040]

Number

[0041] S4: When the temperature deviation is greater than or equal to the set temperature deviation threshold, calculate and determine the target exhaust superheat degree according to the target exhaust superheat degree calculation model based on the frequency of the compressor, the theoretical evaporation temperature, and the theoretical condensation temperature. Here, the target exhaust superheat degree calculation model is fitted by the compressor sample data including the existing theoretical evaporation temperature, the frequency of the compressor, the theoretical condensation temperature, and the corresponding target exhaust superheat degree.

[0042] That is, when T out_max -T out ≧a, calculate and determine the target exhaust superheat degree T set_dsh based on the target exhaust superheat degree calculation model. Here, the target exhaust superheat degree calculation model is represented by the following formula.

[0043]

Number

[0045] Here, the target exhaust temperature is a preset value and can be changed according to actual demand.

[0046] S5: Exhaust superheat control is performed on the expansion valve based on the target exhaust superheat and the actual exhaust superheat.

[0047] The process of controlling the exhaust superheat of the expansion valve based on the target exhaust superheat and the actual exhaust superheat is as follows: The superheat error between the actual exhaust superheat and the target exhaust superheat is given by: Superheat Error = |T dsh -T set_dsh The calculation is performed using the formula |, When the superheating error exceeds the set superheating error threshold b, i.e., |T dsh -T set_dsh |>b, target exhaust superheat T set_dsh Based on this, PID control is applied to the expansion valve, The superheating error is less than the set superheating error threshold b, i.e., |T dsh -T set_dsh This includes, if |≤b, not adjusting the expansion valve and allowing the equipment unit to continue stable operation.

[0048] Here, b can generally be set to 0-10°C.

[0049] Furthermore, in this embodiment, the target exhaust temperature T set_out Even when controlling the expansion valve based on the target exhaust superheat T, set_dsh Even when controlling the expansion valve based on this, the control accuracy is further improved because the expansion valve is controlled by PID.

[0050] Using refrigerant R410A as an example, the expansion valve control method, taking into account the configuration settings of the air-source heat pump disclosed in this embodiment, will be described in detail.

[0051] First, the outdoor heat exchange area F on the evaporation side. e 169m 2 The rated airflow G of the outdoor fan is 0.844 m³. 3 / s, compressor stroke volume V0 is 1.1 × 10 -4 m 3 / rev, the heat exchange coefficient K on the condensation side is 1300W / (m 2 • K), heat exchange area F on the condensation side c 16.8m 2 , exhaust alarm limit temperature T out_max Set to 115℃, target exhaust temperature T set_out The temperature was determined to be 110°C.

[0052] The monitoring results showed that the ambient temperature T a The temperature is -12℃, and the compressor exhaust temperature is T out The temperature is 103.92℃, and the exhaust pressure of the compressor is P. con The pressure was 2501 kPa, the inlet water temperature t1 on the condensing side was 35.26°C, the outlet water temperature t2 on the condensing side was 40.72°C, the compressor frequency n was 100 Hz, and the mass flow rate m of the water on the condensing side was 2.05 m / s.

[0053]

number

number

[0054] Based on the compressor exhaust pressure, the actual condensation temperature T c,actual It was determined to be =43℃, T dsh =T out -T c,actual When calculated in real time, the actual exhaust superheat T dsh The temperature was 60.88℃.

[0055] If a is 5°C, then T out_max -T out =11.07℃≧a, T set_dsh=(18.228 - 0.081829n - 0.0049469T e + 0.090717T c + 0.0013215n 2 + 0.029106T e 2 + 0.0085057T c 2 + 0.0013556nT e - 0.0028757nT c - 0.027437T e T c ) × γ _1 According to the model of, when calculating γ _1 as 1, the target exhaust superheat degree T set_dsh was 60.25°C.

[0056] Further calculation shows that |T dsh - T set_dsh | = 1.62. When b is 2°C, it can be seen that |T dsh - T set_dsh | ≤ b. In this case, the expansion valve is not adjusted and the equipment unit continues stable operation.

[0057] |T dsh - T set_dsh | > b. When the target exhaust superheat degree T set_dsh is based on, the expansion valve is controlled. T out_max - T out < a. When the target exhaust temperature T set_out is based on, the expansion valve is controlled.

[0058] The expansion valve control method considering the configuration settings of the air source heat pump disclosed in this embodiment comprehensively considers the influence of multiple parameters such as the configuration setting parameters of the air source heat pump, the frequency of the compressor, the environmental temperature, and the feed water temperature when calculating the theoretical evaporation temperature and the theoretical condensation temperature. Therefore, the calculation accuracy is high. When calculating the target exhaust superheat degree using these accurate theoretical evaporation temperature and theoretical condensation temperature, and further performing exhaust superheat degree control on the expansion valve based on the target exhaust superheat degree, the accuracy of the exhaust superheat degree control of the expansion valve is improved.

[0059] Furthermore, in this embodiment, exhaust superheat control effectively avoids problems such as system oscillation and excessive rise in exhaust temperature caused by insufficient accuracy of pressure sensors in low-temperature environments, thereby improving control accuracy and ensuring safe and efficient system operation, thus broadening its applicability.

[0060] Example 2 In this embodiment, an expansion valve control system is provided that takes into account the configuration settings of an air-source heat pump, A data acquisition module for obtaining ambient temperature, condensation side inlet water temperature, outlet water temperature and water mass flow rate, as well as compressor frequency, exhaust temperature and exhaust pressure, A theoretical temperature / actual exhaust superheat calculation module is used to calculate the theoretical evaporation temperature and theoretical condensation temperature according to the theoretical evaporation temperature model and theoretical condensation temperature model based on the acquired data and the configuration setting parameters of the air heat source heat pump, to calculate the actual condensation temperature based on the compressor exhaust pressure and refrigerant physical property parameters, and to calculate the actual exhaust superheat based on the actual condensation temperature. A temperature deviation calculation module for calculating the temperature deviation between the compressor exhaust temperature and the exhaust alarm limit temperature, A target exhaust superheat calculation module for calculating and determining the target exhaust superheat according to a target exhaust superheat calculation model based on the compressor frequency, theoretical evaporation temperature, and theoretical condensation temperature when the temperature deviation is greater than or equal to a set temperature deviation threshold, wherein the target exhaust superheat calculation model is fitted with existing compressor sample data including theoretical evaporation temperature, compressor frequency, theoretical condensation temperature, and corresponding target exhaust superheat; An expansion valve control module for controlling the exhaust superheat of the expansion valve based on the target exhaust superheat and the actual exhaust superheat, This invention discloses an expansion valve control system that takes into account the configuration settings of an air-source heat pump equipped with an air-source heat pump.

[0061] The present invention A processor suitable for running computer programs, A computer-readable storage medium in which a computer program is stored, wherein when the computer program is executed by the processor, an expansion valve control method that takes into account the configuration settings of the air heat source heat pump disclosed in Embodiment 1 is realized. Further disclosures include computer equipment.

[0062] The present invention further discloses a computer-readable storage medium on which a computer program is stored, which is loaded by a processor and is suitable for executing an expansion valve control method taking into account the configuration settings of an air-source heat pump disclosed in Example 1.

[0063] The present invention further discloses a computer program product which includes a computer program, and when the computer program is executed by a processor, an expansion valve control method is realized that takes into account the configuration settings of the air heat source heat pump disclosed in Example 1.

[0064] The method disclosed in Example 1 may be executed and completed directly by a hardware processor, or it may be executed and completed by a combination of hardware and software modules within the processor. The software modules may be located in storage media known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers, etc. The storage media is located in memory, and the processor reads the information in memory and, together with its hardware, completes the steps of the method. To avoid redundancy, a detailed explanation is omitted here.

[0065] Those skilled in the art will recognize that each example unit and algorithmic step described in this embodiment can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art will recognize that the described functions can be implemented in different ways in each specific application, but such implementations should not be considered beyond the scope of this application.

[0066] While specific embodiments of the present invention have been described above with reference to the drawings, this does not limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made based on the technical solutions of the present invention and performed by those skilled in the art without creative work still fall within the scope of protection of the present invention.

Claims

1. An expansion valve control method that takes into account the configuration settings of an air-source heat pump executed by a computer, The steps include obtaining the ambient temperature, the inlet water temperature and outlet water temperature on the condensing side, the mass flow rate of the water, and the frequency, exhaust temperature, and exhaust pressure of the compressor, The steps include: calculating the theoretical evaporation temperature and theoretical condensation temperature according to the theoretical evaporation temperature model and theoretical condensation temperature model, based on the acquired data and the configuration setting parameters of the air heat source heat pump; The steps include: calculating the actual condensation temperature based on the compressor's exhaust pressure and refrigerant property parameters, and calculating the actual exhaust superheat based on the actual condensation temperature; A step of calculating the temperature deviation between the compressor exhaust temperature and the exhaust alarm limit temperature, If the temperature deviation is greater than or equal to a set temperature deviation threshold, the step of calculating and determining the target exhaust superheat according to a target exhaust superheat calculation model based on the compressor frequency, theoretical evaporation temperature, and theoretical condensation temperature, wherein the target exhaust superheat calculation model is fitted with existing compressor sample data including theoretical evaporation temperature, compressor frequency, theoretical condensation temperature, and corresponding target exhaust superheat; The step includes controlling the exhaust superheat of the expansion valve based on the target exhaust superheat and the actual exhaust superheat, The aforementioned theoretical evaporation temperature model is expressed by the following equation: [Math 1] In the ceremony, T ａ is the ambient temperature, n is the compressor frequency, G is the rated airflow of the outdoor fan, and F is the ambient temperature. ｅ V is the outdoor heat exchange area on the evaporation side. ０ is the stroke volume of the compressor, T ｅ is the theoretical evaporation temperature, and α is the correction factor. The aforementioned theoretical condensation temperature model is expressed by the following equation: [Math 2] In the formula, m is the mass flow rate of water on the condensation side, and t １ and t ２ These are the inlet and outlet water temperatures on the condensation side, and F ｃ is the heat exchange area on the condensation side, K is the heat exchange coefficient on the condensation side, and T ｃ β is the theoretical condensation temperature, β is the correction factor, and c is the specific heat capacity of water. The target exhaust superheat calculation model is expressed by the following formula: [Math 3] where, T ｓｅｔ＿ｄｓｈ is the target exhaust superheat degree, T ｅ is the theoretical evaporation temperature, T ｃ is the theoretical condensation temperature, n is the frequency of the compressor, γ ＿１ is the correction coefficient The process of controlling the exhaust superheat level of the expansion valve based on the target exhaust superheat level and the actual exhaust superheat level is as follows: Calculating the superheat error between the actual exhaust superheat and the target exhaust superheat, If the superheat error exceeds a set superheat error threshold, PID control is applied to the expansion valve based on the target exhaust superheat; if the superheat error is below the set superheat error threshold, the system is allowed to continue stable operation. If the temperature deviation is below the set temperature deviation threshold, PID control is performed on the expansion valve based on the target exhaust temperature. An expansion valve control method that takes into account the configuration settings of an air-source heat pump, characterized by the features described herein.

2. The expansion valve control method for an air-source heat pump according to claim 1, characterized in that the actual exhaust superheating degree is equal to the value obtained by subtracting the actual condensation temperature from the exhaust temperature of the compressor.

3. An expansion valve control system that takes into account the configuration settings of an air-source heat pump, A data acquisition module for obtaining ambient temperature, condensation side inlet water temperature, outlet water temperature and water mass flow rate, as well as compressor frequency, exhaust temperature and exhaust pressure, A theoretical temperature / actual exhaust superheat calculation module is provided to calculate the theoretical evaporation temperature and theoretical condensation temperature according to the theoretical evaporation temperature model and theoretical condensation temperature model based on the acquired data and the configuration setting parameters of the air heat source heat pump, calculate the actual condensation temperature based on the compressor exhaust pressure and refrigerant physical property parameters, and calculate the actual exhaust superheat based on the actual condensation temperature. A temperature deviation calculation module for calculating the temperature deviation between the compressor exhaust temperature and the exhaust alarm limit temperature, A target exhaust superheat calculation module for calculating and determining the target exhaust superheat according to a target exhaust superheat calculation model based on the compressor frequency, theoretical evaporation temperature, and theoretical condensation temperature when the temperature deviation is greater than or equal to a set temperature deviation threshold, wherein the target exhaust superheat calculation model is fitted with existing compressor sample data including theoretical evaporation temperature, compressor frequency, theoretical condensation temperature, and corresponding target exhaust superheat; The system includes an expansion valve control module for controlling the exhaust superheat of the expansion valve based on the target exhaust superheat and the actual exhaust superheat, The aforementioned theoretical evaporation temperature model is expressed by the following equation: [Math 4] In the ceremony, T ａ is the ambient temperature, n is the compressor frequency, G is the rated airflow of the outdoor fan, and F is the ambient temperature. ｅ V is the outdoor heat exchange area on the evaporation side. ０ is the stroke volume of the compressor, T ｅ is the theoretical evaporation temperature, and α is the correction factor. The aforementioned theoretical condensation temperature model is expressed by the following equation: [Math 5] In the formula, m is the mass flow rate of water on the condensation side, and t １ and t ２ These are the inlet and outlet water temperatures on the condensation side, and F ｃ is the heat exchange area on the condensation side, K is the heat exchange coefficient on the condensation side, and T ｃ β is the theoretical condensation temperature, β is the correction factor, and c is the specific heat capacity of water. The target exhaust superheat calculation model is expressed by the following formula: [Math 6] In the ceremony, T ｓｅｔ＿ｄｓｈ This is the target exhaust superheating degree, T ｅ This is the theoretical evaporation temperature, T ｃ γ is the theoretical condensation temperature, n is the compressor frequency, and γ ＿１ This is a correction factor, The process of controlling the exhaust superheat level of the expansion valve based on the target exhaust superheat level and the actual exhaust superheat level is as follows: Calculating the superheat error between the actual exhaust superheat and the target exhaust superheat, If the superheat error exceeds a set superheat error threshold, PID control is applied to the expansion valve based on the target exhaust superheat; if the superheat error is below the set superheat error threshold, the system is allowed to continue stable operation. If the temperature deviation is below the set temperature deviation threshold, PID control is performed on the expansion valve based on the target exhaust temperature. An expansion valve control system that takes into account the configuration settings of an air-source heat pump, characterized by the features described above.

4. A processor suitable for running computer programs, A computer-readable storage medium in which a computer program is stored, wherein when the computer program is executed by the processor, an expansion valve control method that takes into account the configuration settings of the air heat source heat pump described in claim 1 or 2 is realized on the computer-readable storage medium, Computer equipment characterized by including

5. A computer-readable storage medium having a computer program stored within it, the computer program being loaded by a processor and suitable for executing an expansion valve control method that takes into account the configuration settings of an air heat source heat pump as described in claim 1 or 2.

6. A computer program product comprising a computer program, wherein when the computer program is executed by a processor, an expansion valve control method that takes into account the configuration settings of the air heat source heat pump described in claim 1 or 2 is realized.

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