Electronic expansion valve regulation method, device, air source heat pump and storage medium

Abstract

The application discloses an electronic expansion valve adjusting method and device, an air source heat pump and a storage medium, wherein the method is applied to the air source heat pump, the air source heat pump comprises a compressor, a water side heat exchanger and an electronic expansion valve, and the method comprises the following steps: obtaining exhaust superheat of the compressor, return gas superheat and a refrigerant-water flow temperature difference between refrigerant and water flow in the water side heat exchanger; if there are at least two abnormal operation parameters in the exhaust superheat, the return gas superheat and the refrigerant-water flow temperature difference, determining an adjusting sequence of each abnormal operation parameter according to an influence factor of each abnormal operation parameter on the air source heat pump; and adjusting the opening degree of the electronic expansion valve according to each abnormal operation parameter and the adjusting sequence of the abnormal operation parameter until each abnormal operation parameter returns to normal. The application can make the air source heat pump reliably and efficiently operate.

Description

Technical Field

[0001] This invention relates to the field of air source heat pump technology, specifically to an electronic expansion valve regulation method, device, air source heat pump, and storage medium. Background Technology

[0002] Air source heat pump products use a combination of components such as variable frequency compressors, electronic expansion valves, and water-side heat exchangers to achieve temperature regulation.

[0003] In related technologies, air source heat pump products primarily adjust the opening of the electronic expansion valve based on the exhaust superheat during compressor operation to maintain the reliability of the air source heat pump. However, in actual operation, it has been found that after adjusting the exhaust superheat to a normal state, the efficiency of the air source heat pump may decrease, making it impossible for the air source heat pump to operate reliably and efficiently. Summary of the Invention

[0004] This invention provides an electronic expansion valve regulation method, device, air source heat pump, and storage medium, aiming to enable the air source heat pump to operate reliably and efficiently.

[0005] In a first aspect, embodiments of the present invention provide an electronic expansion valve adjustment method applied to an air source heat pump, wherein the air source heat pump includes a compressor, a water-side heat exchanger, and an electronic expansion valve, and the method includes:

[0006] The discharge superheat and return superheat of the compressor, as well as the temperature difference between the refrigerant and the water flow in the water-side heat exchanger, are obtained.

[0007] If at least two of the exhaust superheat, return superheat, and refrigerant water flow temperature difference are abnormal operating parameters, the adjustment order of each abnormal operating parameter is determined according to the influence factor of each abnormal operating parameter on the air source heat pump.

[0008] According to each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the opening of the electronic expansion valve is adjusted until each of the abnormal operating parameters returns to normal.

[0009] Optionally, before determining the adjustment order of each abnormal operating parameter based on its influence factor on the air source heat pump, the following steps are included:

[0010] Obtain the reliability impact score and performance impact score corresponding to the abnormal operating parameters;

[0011] The reliability impact score and the performance impact score are weighted according to preset weights to obtain the impact factor.

[0012] Optionally, obtaining the exhaust superheat and return superheat of the air source heat pump, and the refrigerant-water flow temperature difference between the refrigerant and the water flow in the water-side heat exchanger, includes:

[0013] If the air source heat pump is in cooling mode, the refrigerant gas pipe temperature of the air source heat pump and the outlet water temperature of the water-side heat exchanger are obtained, and the refrigerant water flow temperature difference is determined based on the refrigerant gas pipe temperature and the outlet water temperature.

[0014] If the air source heat pump is in heating mode, the refrigerant liquid pipe temperature of the air source heat pump and the inlet water temperature of the water-side heat exchanger are obtained, and the refrigerant water flow temperature difference is determined based on the refrigerant liquid pipe temperature and the inlet water temperature.

[0015] Optionally, before obtaining the exhaust superheat and return superheat of the air source heat pump, and the refrigerant-water flow temperature difference between the refrigerant and the water flow in the water-side heat exchanger, the method further includes:

[0016] Receive the start command of the air source heat pump;

[0017] Obtain the operating environment parameters of the air source heat pump and the setting parameters corresponding to the start command;

[0018] The initial opening degree of the electronic expansion valve and its corresponding running time are determined based on the operating environment parameters, the set parameters, and the preset standard working comparison table.

[0019] The electronic expansion valve is controlled to operate according to the initial opening degree. When the operating time reaches the specified operating time, the exhaust superheat and return superheat of the air source heat pump, as well as the temperature difference between the refrigerant and water flow in the water-side heat exchanger, are obtained.

[0020] Optionally, before determining the adjustment order of each abnormal operating parameter based on its influence factor on the air source heat pump, the method further includes:

[0021] Based on the comparison results between each abnormal operating parameter and its corresponding preset operating range, the abnormal trend of the abnormal operating parameter is determined.

[0022] When the abnormal trends are consistent, the target change opening of the electronic expansion valve corresponding to each abnormal operating parameter is determined based on the difference between each abnormal operating parameter and the preset operating range, and the opening of the electronic expansion valve is adjusted according to the maximum target change opening.

[0023] When the abnormal trends are inconsistent, the adjustment order of each abnormal operating parameter is determined based on the influence factor of each abnormal operating parameter on the air source heat pump.

[0024] The step of adjusting the opening of the electronic expansion valve according to each of the abnormal operating parameters and the adjustment order of the abnormal operating parameters includes:

[0025] Based on each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the target abnormal operating parameters to be adjusted are obtained.

[0026] Obtain the difference between the target abnormal operating parameter and the preset operating range corresponding to the target abnormal operating parameter;

[0027] The target opening degree of the electronic expansion valve is determined based on the difference and the preset proportional coefficient, and the opening degree of the electronic expansion valve is adjusted to the target opening degree.

[0028] Optionally, adjusting the opening of the electronic expansion valve according to each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, until each of the abnormal operating parameters returns to normal, includes:

[0029] Based on each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the target abnormal operating parameters to be adjusted are obtained.

[0030] If the target abnormal operating parameter is lower than the corresponding preset operating range, the opening of the electronic expansion valve is adjusted to be reduced.

[0031] If the target abnormal operating parameter is higher than the corresponding preset operating range, the opening of the electronic expansion valve will be adjusted to increase.

[0032] Secondly, embodiments of the present invention provide an electronic expansion valve regulating device, the electronic expansion valve regulating device comprising:

[0033] The acquisition module is used to acquire the compressor's exhaust superheat and return superheat, as well as the refrigerant-water flow temperature difference between the refrigerant and the water flow in the water-side heat exchanger.

[0034] The determination module is used to determine the adjustment order of each abnormal operating parameter based on the influence factor of each abnormal operating parameter on the air source heat pump if at least two abnormal operating parameters exist among the exhaust superheat, the return superheat, and the refrigerant water flow temperature difference.

[0035] The control module is used to adjust the opening of the electronic expansion valve according to each of the abnormal operating parameters and the adjustment sequence of the abnormal operating parameters, until each of the abnormal operating parameters returns to normal.

[0036] Thirdly, embodiments of the present invention also provide an air source heat pump, including a memory storing multiple instructions; a processor loads instructions from the memory to execute the steps of any of the electronic expansion valve regulation methods provided in the embodiments of the present invention.

[0037] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing a plurality of instructions adapted for loading by a processor to execute the steps of any of the electronic expansion valve adjustment methods provided in the embodiments of the present invention.

[0038] This invention first obtains the exhaust superheat and return superheat of the compressor of the air source heat pump, as well as the refrigerant-water flow temperature difference between the refrigerant and the water flow in the water-side heat exchanger; if at least two of the exhaust superheat, return superheat, and refrigerant-water flow temperature differences exist, the adjustment order of each abnormal operating parameter is determined according to the influence factor of each abnormal operating parameter on the air source heat pump; according to each abnormal operating parameter and the adjustment order of the abnormal operating parameters, the opening of the electronic expansion valve is adjusted until each abnormal operating parameter returns to normal. Abnormalities in exhaust superheat, return superheat, and water-side heat exchanger operation will all affect the operation of the air source heat pump. These abnormalities can impact the reliability and stability of the air source heat pump to varying degrees. Based on the influence factors of these parameters on the reliability and efficiency of the air source heat pump, and ensuring that the operating parameters with a greater impact on reliability are within the normal range, the electronic expansion valve is further adjusted according to the operating parameters that ensure efficiency. This determines the adjustment sequence among the abnormal operating parameters. Based on each abnormal operating parameter and the adjustment sequence, the opening of the electronic expansion valve is controlled one by one according to the abnormal operating parameters until all abnormal operating parameters return to normal, allowing the air source heat pump to operate reliably and efficiently. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a flowchart illustrating one embodiment of the electronic expansion valve adjustment method provided in this invention.

[0041] Figure 2 This is a schematic diagram of the structure of the air source heat pump in an embodiment of the present invention;

[0042] Figure 3 This is a schematic flowchart of another embodiment of the electronic expansion valve adjustment method provided in this invention.

[0043] Figure 4This is a flowchart illustrating another embodiment of the electronic expansion valve adjustment method provided in this invention.

[0044] Figure 5 This is a schematic diagram of the structure of the electronic expansion valve regulating device provided in the embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the structure of the air source heat pump provided in the embodiment of the present invention. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Furthermore, in the description of the embodiments of the present invention, the terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, "multiple" means two or more, unless otherwise explicitly specified.

[0047] This invention provides an electronic expansion valve regulation method, apparatus, air source heat pump, and computer-readable storage medium.

[0048] Specifically, this embodiment will be described from the perspective of an electronic expansion valve regulating device, which can be integrated into an air source heat pump. That is, the electronic expansion valve regulating method of this embodiment can be executed by an air source heat pump, or optionally by a device with a drying function such as a washing machine.

[0049] The following detailed description is provided in conjunction with the accompanying drawings. In this embodiment, an air-source heat pump is used as the executing entity. It should be noted that the order of description in the following embodiments is not intended to limit the preferred order of the embodiments. Although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown in the accompanying drawings.

[0050] According to the background description of the present invention, the electronic expansion valve adjustment process in the related art is relatively rough, only taking into account the reliability of the air source heat pump, and cannot guarantee the reliable and efficient operation of the air source heat pump.

[0051] To address the above problems, this invention discloses an electronic expansion valve adjustment method, please refer to... Figure 1 The specific process of this electronic expansion valve adjustment method can be summarized in steps S10 to S30, wherein:

[0052] Step S10: Obtain the compressor's exhaust superheat and return superheat, as well as the refrigerant-water flow temperature difference in the water-side heat exchanger.

[0053] In this embodiment, the electronic expansion valve adjustment method can be applied to an air source heat pump. The air source heat pump includes a compressor, an air-side heat exchanger, and an electronic expansion valve. The electronic expansion valve is installed on the refrigerant liquid pipe of the air source heat pump. The air source heat pump may also include an electronic expansion valve adjustment device, which can control the opening degree of the electronic expansion valve according to some set algorithms. Filters are also installed at both ends of the electronic expansion valve to filter out impurities in the refrigerant flowing through it, preventing their accumulation at the electronic expansion valve, ensuring its normal operation, and accurately controlling the opening degree of the electronic expansion valve.

[0054] The water-side heat exchanger in an air source heat pump may also include a water flow pipe and a refrigerant pipe adjacent to the water flow pipe. One end of the refrigerant pipe in the water-side heat exchanger is connected to the refrigerant liquid pipe in the air source heat pump, and the other end is connected to the refrigerant gas pipe in the air source heat pump. Water flows from the inlet of the water-side heat exchanger through the interior of the water-side heat exchanger and flows out from the outlet of the water-side heat exchanger. During the process of flowing through the water-side heat exchanger, it exchanges heat with the refrigerant in the adjacent refrigerant pipe, causing the refrigerant to change from a gaseous state to a liquid state.

[0055] In different modes, air-side heat exchangers and water-side heat exchangers can serve as condensers and evaporators in an air-source heat pump, respectively. The compressor compresses low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas, which is then discharged to the condenser for condensation. The required exhaust superheat of the air-source heat pump is the difference between the compressor's exhaust temperature and the condensation temperature of the refrigerant after condensation in the air-source heat pump system. The condenser converts the high-temperature, high-pressure refrigerant into a low-temperature, high-pressure liquid after releasing heat. This liquid is then depressurized by an electronic expansion valve and flows through the evaporator to absorb heat, becoming low-temperature, low-pressure gas, which returns to the compressor. The required return superheat of the air-source heat pump is the difference between the compressor's return temperature and the condensation temperature of the refrigerant after evaporation in the air-source heat pump system. In the water-side heat exchanger, there is heat exchange between the refrigerant and the water flow; the refrigerant-water temperature difference is the temperature difference between the refrigerant and the water flow in the water-side heat exchanger.

[0056] Optionally, obtaining the exhaust superheat and return superheat of the air source heat pump, and the refrigerant-water flow temperature difference between the refrigerant and the water flow in the water-side heat exchanger, includes:

[0057] If the air source heat pump is in cooling mode, the refrigerant gas pipe temperature of the air source heat pump and the outlet water temperature of the water-side heat exchanger are obtained, and the refrigerant water flow temperature difference is determined based on the refrigerant gas pipe temperature and the outlet water temperature.

[0058] If the air source heat pump is in heating mode, the refrigerant liquid pipe temperature of the air source heat pump and the inlet water temperature of the water-side heat exchanger are obtained, and the refrigerant water flow temperature difference is determined based on the refrigerant liquid pipe temperature and the inlet water temperature.

[0059] In this embodiment, the air source heat pump can have a heating mode and a cooling mode, as shown in the following figure. Figure 2 , Figure 2 A four-way valve is installed to adjust the operating mode of the air source heat pump. In cooling mode, the four-way valve is in its first opening position, with the air-side heat exchanger acting as the condenser and the water-side heat exchanger as the evaporator. The high-temperature, high-pressure gas discharged from the compressor enters the air-side heat exchanger and condenses into a low-temperature, high-pressure liquid, which is then input into the water-side heat exchanger as a low-temperature, low-pressure liquid, absorbing heat from the water flow within the air-side heat exchanger. In cooling mode, the temperature difference between the refrigerant gas pipe temperature of the air source heat pump and the outlet water temperature of the water-side heat exchanger is used as the refrigerant-water temperature difference, which more clearly reflects the temperature difference between the refrigerant gas pipe temperature and the water-side heat exchanger temperature. Furthermore, in cooling mode, the compressor's discharge temperature and the air-side heat exchanger's outlet temperature are detected, and the compressor's discharge superheat is determined based on the difference between the discharge and outlet temperatures. The compressor's return gas temperature and the air source heat pump's system pressure are detected, and the compressor's return gas superheat is determined based on the difference between the saturation temperatures corresponding to the return gas temperature and the system pressure.

[0060] In heating mode, the four-way valve is in its second opening position. The high-temperature, high-pressure gas discharged from the compressor enters the water-side heat exchanger and condenses into a low-temperature, high-pressure liquid. This liquid is heated by the water flow within the water-side heat exchanger. The temperature difference between the refrigerant liquid pipe temperature of the air-source heat pump and the inlet water temperature of the water-side heat exchanger serves as the refrigerant-water temperature difference, more clearly demonstrating the difference between the refrigerant gas pipe temperature and the water-side heat exchanger temperature. Furthermore, in heating mode, the compressor's discharge temperature and the air-source heat pump's system pressure are monitored. The compressor's discharge superheat is determined based on the difference between the saturation temperatures corresponding to the discharge temperature and the system pressure. The compressor's return gas temperature is also monitored, and the return gas superheat is determined based on the difference between the return gas temperature and the outlet temperature of the air-side heat exchanger.

[0061] By calculating the refrigerant-water flow temperature difference according to different operating modes, the refrigerant-water flow temperature difference that best reflects the temperature difference between the refrigerant and the water flow in the water-side heat exchanger can be obtained, so as to more accurately adjust the opening of the electronic expansion valve and improve the efficiency of the air source heat pump.

[0062] Step S20: If there are at least two abnormal operating parameters among the exhaust superheat, the return superheat, and the refrigerant water flow temperature difference, then determine the adjustment order of each abnormal operating parameter according to the influence factor of each abnormal operating parameter on the air source heat pump.

[0063] In this embodiment, the abnormality of three operating parameters—exhaust superheat, return superheat, and refrigerant water temperature difference—is detected by comparing these parameters with their corresponding preset operating ranges. If an operating parameter is outside its preset operating range, it is determined to be an abnormal operating parameter. If any of these three parameters is abnormal, the opening of the electronic expansion valve is controlled accordingly. If at least two of these parameters are abnormal, the adjustment order is determined based on the influence factor of the air source heat pump corresponding to each abnormal operating parameter. The influencing factor refers to the factors that affect the overall operating effect of an air source heat pump. The overall operating effect is affected by reliability and efficiency. The exhaust superheat, return superheat, and refrigerant water flow temperature have different degrees of influence on reliability and efficiency, and therefore their impact on the overall operating effect will also be different. The larger the influencing factor, the more it promotes the overall operating effect, the higher the priority of adjustment, and the earlier it is ranked in the adjustment order.

[0064] Optionally, the reliability impact score and efficiency impact score of abnormal operating parameters are obtained, and the reliability impact score and efficiency impact score are weighted according to preset weights to obtain an impact factor. The preset weight corresponding to the reliability impact score can be greater than the preset weight corresponding to the efficiency impact score, so that the adjustment order can be determined according to the impact of abnormal operating parameters on the reliability and efficiency of the air source heat pump.

[0065] Optionally, before step S20, the following steps are also included:

[0066] Obtain the relative abnormal value, reliability impact score, and performance impact score between the abnormal operating parameters and their corresponding preset operating range;

[0067] The relative outlier, the reliability impact score, and the effectiveness impact score are weighted according to preset weights to obtain the impact factor.

[0068] In this embodiment, the influencing factor can characterize the degree of impact on the overall operating effect of the air source heat pump. Among them, reliability and efficiency affect the overall operating effect. In addition, the relative outlier of abnormal operating parameters compared with the preset operating range also affects the overall operating effect. The relative outlier is used to characterize the acceptable degree of difference between abnormal operating parameters and the corresponding preset operating range, and is calculated by the following formula:

[0069] Relative outlier = the difference between the abnormal operating parameter and its corresponding preset operating range L / the maximum threshold of the preset operating range max - the minimum threshold min.

[0070] Specifically, when the abnormal operating parameter is less than the minimum threshold, L = minimum threshold min - abnormal operating parameter; when the abnormal operating parameter is greater than the maximum threshold, L = abnormal operating parameter - maximum threshold max. The larger the relative outlier, the more difficult it is to ignore the difference L, the smaller its acceptable level, and the greater its impact on the overall operating effect. Conversely, the smaller the relative outlier, the easier it is to ignore the difference L, the greater its acceptable level, and the smaller its impact on the overall operating effect. This relative outlier is a parameter that needs to be determined in real time during the operation of the air source heat pump.

[0071] Therefore, the influencing factor can be determined based on the relative abnormal values ​​of abnormal operating parameters and the preset operating range, as well as their impact on the reliability and efficiency of the air source heat pump. The reliability and efficiency impact scores respectively represent the influence of abnormal operating parameters on the reliability and efficiency of the air source heat pump. Through some operating experience, theoretical derivation, or historical operating parameters of the air source heat pump, the reliability and efficiency impact scores when the exhaust superheat, return superheat, and refrigerant water flow temperature difference are abnormal can be determined.

[0072] Specifically, during the phase change evaporation or condensation of the refrigerant in the water-side heat exchanger, the heat absorption or release is at its maximum. Superheating (above the evaporation or condensation temperature) or supercooling (below the evaporation or condensation temperature) results in very little heat exchange. Therefore, the heat exchange process between the refrigerant and water flow must be controlled so that the refrigerant is precisely in the evaporation or condensation process, minimizing superheating or supercooling. At this point, the water temperature and the refrigerant's evaporation or condensation temperature are essentially the same. Thus, the refrigerant temperature must be controlled near the water temperature; it cannot be too low or too high, otherwise heat exchange will be incomplete, and the air-source heat pump's efficiency will be low. Consequently, its efficiency impact score is greater than that of exhaust superheat and return superheat. Abnormal return superheat can also affect the efficiency of the air-source heat pump to some extent; therefore, the efficiency impact score of return superheat is greater than that of exhaust superheat.

[0073] Reliability impact scores can be determined based on specific experimental data or historical operating parameters. This involves identifying the impact of individual abnormal operating parameters on the air source heat pump's oil and liquid return processes, and then determining the reliability impact score for each abnormal operating parameter based on its impact. Alternatively, reliability impact scores can be determined through inference. Common theory suggests that the reliability impact score for exhaust superheat is greater than that for return superheat, and the reliability impact score for return superheat is greater than that for condensate temperature difference.

[0074] After determining the reliability impact score, the preset weights for the reliability impact score, performance impact score, and relative outliers are obtained. Based on the preset weights, the reliability impact score, performance impact score, and relative outliers corresponding to each operating parameter are weighted respectively. The weighted results are used as the impact factors of the abnormal operating parameters. Then, the parameters are sorted from largest to smallest according to the impact factors to obtain the adjustment order of each abnormal operating parameter.

[0075] In some embodiments, the impact of reliability on the air source heat pump is given priority, and the preset weight corresponding to the reliability impact score is set to be greater than the preset weight corresponding to the efficiency impact score. When the reliability impact score E is: E_exhaust superheat > E_return superheat > E_condensate temperature difference, and the efficiency impact score F is: F_exhaust superheat > F_return superheat > F_condensate temperature difference, and the relative outliers are not significantly different, the impact factor of exhaust superheat can be made greater than that of return superheat, and the impact factor of return superheat is greater than that of refrigerant water flow temperature difference. The adjustment order of these three factors is: exhaust superheat takes precedence over return superheat, and return superheat takes precedence over refrigerant water flow temperature difference. This allows for further improvement in the efficiency of the air source heat pump while ensuring reliability.

[0076] Step S30: Adjust the opening of the electronic expansion valve according to each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, until each of the abnormal operating parameters returns to normal.

[0077] In this embodiment, after determining the adjustment order of each abnormal operating parameter, each abnormal operating parameter is taken as a target abnormal operating parameter based on the adjustment order. The electronic expansion valve's behavior is adjusted according to the target abnormal operating parameter to adjust the system pressure, i.e., to adjust the refrigerant transfer rate in the air source heat pump, thereby adjusting the air source heat pump's operating performance. During the adjustment process, if the target abnormal operating parameter returns to normal, the next target abnormal operating parameter is determined according to the adjustment order, and the air source heat pump is adjusted again. If all abnormal operating parameters return to normal during the adjustment process, the adjustment can be stopped even if the adjustment order is not completed. If a new abnormal operating parameter appears before the adjustment order is completed, the adjustment order of each abnormal operating parameter is determined again based on its influence factor on the air source heat pump, until all abnormal operating parameters return to normal.

[0078] In the technical solution disclosed in this embodiment, the exhaust superheat and return superheat of the air source heat pump compressor, as well as the refrigerant-water flow temperature difference between the refrigerant and the water flow in the water-side heat exchanger, are obtained. If at least two abnormal operating parameters exist among the exhaust superheat, the return superheat, and the refrigerant-water flow temperature difference, the adjustment order of each abnormal operating parameter is determined according to the influence factor of each abnormal operating parameter on the air source heat pump. The opening of the electronic expansion valve is adjusted according to each abnormal operating parameter and the adjustment order of the abnormal operating parameters until each abnormal operating parameter returns to normal. Abnormalities in exhaust superheat, return superheat, and water-side heat exchanger operation will all affect the operation of the air source heat pump. These abnormalities can impact the reliability and stability of the air source heat pump to varying degrees. Based on the influence factors of these parameters on the reliability and efficiency of the air source heat pump, and ensuring that the operating parameters with a greater impact on reliability are within the normal range, the electronic expansion valve is further adjusted according to the operating parameters that ensure efficiency. This determines the adjustment sequence among the abnormal operating parameters. Based on each abnormal operating parameter and the adjustment sequence, the opening of the electronic expansion valve is controlled one by one according to the abnormal operating parameters until all abnormal operating parameters return to normal, allowing the air source heat pump to operate reliably and efficiently.

[0079] Further, step S30 includes:

[0080] Based on each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the target abnormal operating parameters to be adjusted are obtained.

[0081] Obtain the difference between the target abnormal operating parameter and the preset operating range corresponding to the target abnormal operating parameter;

[0082] The target opening degree of the electronic expansion valve is determined based on the difference and the preset proportional coefficient, and the opening degree of the electronic expansion valve is adjusted to the target opening degree.

[0083] In this embodiment, the target abnormal operating parameter to be adjusted is obtained according to the adjustment order of each abnormal operating parameter. Currently, the opening degree of the electronic expansion valve needs to be controlled based on the target abnormal operating parameter. The preset operating range corresponding to the target abnormal operating parameter is obtained, and the difference between the target abnormal operating parameter and its corresponding preset operating range is determined. On a number line, the absolute value of the difference is the unit distance between the target abnormal operating parameter and its corresponding preset operating range. When the target abnormal operating parameter is less than the minimum threshold of its corresponding preset operating range, the difference = target abnormal operating parameter - minimum threshold. When the target abnormal operating parameter is greater than or equal to the maximum threshold of its corresponding preset operating range, the difference = target abnormal operating parameter - maximum threshold. The target change opening degree of the electronic expansion valve is determined based on the difference and a preset proportional coefficient, where the target change opening degree = difference * preset proportional coefficient. The preset proportional coefficient is a positive value, and a preset proportional coefficient of 1 provides a better effect.

[0084] For example, if the target abnormal operating parameter is exhaust superheat:

[0085] If TDH (exhaust superheat) < TDHlow (minimum threshold of normal operating range of exhaust superheat), the target change opening of the electronic expansion valve is (TDH-TDHlow), and the target opening of the electronic expansion valve is the current opening + (TDH-TDHlow).

[0086] If TDHlow≤TDH<TDHhigh (the maximum threshold of the normal operating range of exhaust superheat), the next abnormal operating parameter corresponding to the exhaust superheat is determined as the target abnormal operating parameter according to the adjustment order;

[0087] If TDHhigh≤TDH, the target opening of the electronic expansion valve is the current opening + (TDH-TDHlow).

[0088] By determining the target opening degree of the electronic expansion valve based on the difference between the target abnormal operating parameters and the preset operating range corresponding to the target abnormal operating parameters, and using a preset proportional coefficient, the electronic expansion valve can be adjusted more precisely, thereby further improving the reliability and efficiency of the air source heat pump and enhancing its operating performance.

[0089] Further, step S30 includes:

[0090] Based on each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the target abnormal operating parameters to be adjusted are obtained.

[0091] If the target abnormal operating parameter is lower than the corresponding preset operating range, the opening of the electronic expansion valve is adjusted to be reduced.

[0092] If the target abnormal operating parameter is higher than the corresponding preset operating range, the opening of the electronic expansion valve will be adjusted to increase.

[0093] In this embodiment, the target abnormal operating parameter to be adjusted is obtained according to the adjustment order of each abnormal operating parameter. Currently, the opening of the electronic expansion valve needs to be controlled according to the target abnormal operating parameter. To improve control efficiency, the opening of the electronic expansion valve can be directly adjusted based on the target abnormal parameter. That is, the opening of the electronic expansion valve is determined to decrease or increase based on the comparison result of the preset operating range corresponding to the abnormal operating parameter. Furthermore, a unit opening can be set. If the target abnormal operating parameter is not within the corresponding preset operating range, the electronic expansion valve is adjusted by a unit opening. If the target abnormal operating parameter is still not within the corresponding preset operating range, the electronic expansion valve is readjusted by a unit opening until the target abnormal operating parameter is operating normally. This achieves fine-tuning of the opening. The logic design is simple and can improve control efficiency.

[0094] Specifically, when the target abnormal operating parameter is exhaust superheat, if the exhaust superheat is lower than the minimum threshold of the corresponding preset operating range, the opening of the electronic expansion valve is adjusted to be reduced; if the exhaust superheat is higher than the minimum threshold of the corresponding preset operating range, the opening of the electronic expansion valve is adjusted to be reduced. When the target abnormal operating parameter is return gas superheat, if the return gas superheat is lower than the minimum threshold of the corresponding preset operating range, the opening of the electronic expansion valve is adjusted to be reduced; if the return gas superheat is higher than the minimum threshold of the corresponding preset operating range, the opening of the electronic expansion valve is adjusted to be reduced. When the target abnormal operating parameter is refrigerant water temperature difference, if the refrigerant water temperature difference is lower than the minimum threshold of the corresponding preset operating range, the opening of the electronic expansion valve is adjusted to be reduced; if the refrigerant water temperature difference is higher than the minimum threshold of the corresponding preset operating range, the opening of the electronic expansion valve is adjusted to be reduced.

[0095] By comparing the target abnormal operating parameters with the preset operating range, the opening of the electronic expansion valve can be increased or decreased. This improves control efficiency and, by fine-tuning the opening of the electronic expansion valve, gradually adjusts the target abnormal operating parameters to the corresponding preset operating range, reducing over-adjustment and other impacts on the air source heat pump, thereby further improving the reliability and efficiency of the air source heat pump.

[0096] Optionally, refer to Figure 3 Based on any of the above embodiments, in another embodiment of the electronic expansion valve adjustment method of the present invention, before step 10, the method further includes:

[0097] S40. Receive the start command of the air source heat pump;

[0098] In this embodiment, the air source heat pump can receive a start command triggered by the user. After receiving the start command, the operating mode of the air source heat pump and some setting parameters in the required operating mode can be determined according to the start command, such as the setting parameters for the water temperature at the outlet of the water-side heat exchanger.

[0099] S50. Obtain the operating environment parameters of the air source heat pump and the setting parameters corresponding to the start command;

[0100] In this embodiment, during the initial operation of the air source heat pump, it is also necessary to obtain the operating environment parameters, such as the ambient temperature and humidity of the air-side heat exchanger and the water temperature at the inlet of the water-side heat exchanger. Based on the operating environment parameters of the air source heat pump and the setting parameters corresponding to the start command, it is possible to determine the relevant parameters of the air source heat pump to be adjusted to the setting parameters under the operating environment parameters, and to determine the work done by the air source heat pump.

[0101] S60. Determine the initial opening degree of the electronic expansion valve and its corresponding running time based on the operating environment parameters, the set parameters, and the preset standard working comparison table.

[0102] In this embodiment, the air source heat pump is equipped with a standard operating reference table, including preset operating environment parameters, preset setting parameters, and preset opening degree and corresponding running time of the electronic expansion valve. The standard operating reference table can then be used to look up the opening degree and corresponding running time of the electronic expansion valve corresponding to the current operating environment parameters and current setting parameters, and this can be used as the initial opening degree of the electronic expansion valve. It should be noted that the initial opening degree and corresponding running time of the electronic expansion valve are different under different operating conditions. During the initial operation of the air source heat pump, operating according to the standard operating reference table ensures reliable and efficient operation for a certain period.

[0103] S70. Control the operation of the electronic expansion valve according to the initial opening degree. When the operation reaches the specified running time, obtain the exhaust superheat and return superheat of the air source heat pump, as well as the temperature difference between the refrigerant and water flow in the water-side heat exchanger.

[0104] In this embodiment, after the air source heat pump is started, the initial opening degree of the electronic expansion valve is determined, and the electronic expansion valve is controlled to open at the initial opening degree and maintain it for a certain period of time. When the electronic expansion valve is open at the initial opening degree and the operation has reached the above-mentioned running time, step S10 is executed.

[0105] In the technical solution disclosed in this embodiment, after receiving the start command, the electronic expansion valve is adjusted according to the operating environment and the initial opening degree corresponding to the start command. After running for a period of time, the exhaust superheat, return superheat and refrigerant water flow temperature difference are detected for abnormalities, so that the air source heat pump can continue to operate reliably and efficiently.

[0106] Optionally, refer to Figure 4 Based on any of the above embodiments, in another embodiment of the electronic expansion valve adjustment method of the present invention, before step 20, the method further includes:

[0107] Step S80: Determine the abnormal trend of the abnormal operating parameters based on the comparison results between each abnormal operating parameter and its corresponding preset operating range;

[0108] In this embodiment, whether the exhaust superheat, return superheat, and refrigerant water temperature difference are abnormal operating parameters is determined based on whether they are within their corresponding preset operating ranges. If they are, they are not abnormal operating parameters; otherwise, they are abnormal operating parameters. The number of abnormal operating parameters is further determined. If at least two of the exhaust superheat, return superheat, and refrigerant water temperature difference are abnormal, the abnormal trend of the abnormal operating parameters can be determined by comparing them with their corresponding preset operating ranges. If the abnormal operating parameter is lower than the minimum threshold of the preset operating range, its abnormal trend is considered to be decreasing; if the abnormal operating parameter is higher than the maximum threshold of the preset operating range, its abnormal trend is considered to be increasing.

[0109] Step S90: When the abnormal trends are consistent, determine the target change opening of the electronic expansion valve corresponding to each abnormal operating parameter based on the difference between each abnormal operating parameter and the preset operating range, and adjust the opening of the electronic expansion valve according to the maximum target change opening.

[0110] In this embodiment, the abnormal trend of the abnormal operating parameters is either increasing or decreasing. When the abnormal trends of all abnormal operating parameters are either increasing or decreasing, it is considered that the abnormal trends are consistent. Referring to the above, for exhaust superheat, return superheat, and refrigerant water flow temperature difference, adjusting the opening of the electronic expansion valve based on the comparison results between the abnormal operating parameters and the corresponding preset operating ranges shows a certain consistency. Therefore, when the abnormal trends are consistent, the adjustment tendency of the electronic expansion valve opening based on each abnormal operating parameter is consistent, either increasing or decreasing. This adjustment of the electronic expansion valve opening tends to bring all abnormal operating parameters into the preset operating range. The target change opening of the electronic expansion valve corresponding to each abnormal operating parameter is determined based on the difference between different abnormal operating parameters and the preset operating range, as well as the preset proportional coefficient. The target opening of the electronic expansion valve is determined based on the largest target change opening, the electronic expansion valve adjustment tendency determined by the abnormal trend, and the current opening of the electronic expansion valve, and the electronic expansion valve is controlled to adjust to the target opening.

[0111] Optionally, after running for a period of time, step S10 can be re-executed until all abnormal operating parameters return to normal.

[0112] Step S100: When the abnormal trends are inconsistent, determine the adjustment order of each abnormal operating parameter based on the influence factor of each abnormal operating parameter on the air source heat pump.

[0113] In this embodiment, if the abnormal trends are inconsistent, the adjustment tendencies of the electronic expansion valves based on the abnormal operating parameters are inconsistent. It is necessary to determine the adjustment order of each abnormal operating parameter based on the influence factor of each abnormal operating parameter on the air source heat pump, and then control the opening of the electronic expansion valve according to the adjustment order of each abnormal operating parameter until each abnormal operating parameter returns to normal.

[0114] In the technical solution disclosed in this embodiment, if there are multiple abnormal operating parameters, the consistency of the abnormal trends of the abnormal operating parameters is first determined. If they are consistent, the control logic that causes the largest change in the adjustment of the electronic expansion valve among the abnormal operating parameters can be used to control the opening of the electronic expansion valve, thereby improving the efficiency of reliable and efficient operation of the air source heat pump.

[0115] This embodiment also provides an electronic expansion valve regulating device, which can be specifically integrated into an air source heat pump. For example, as... Figure 5 As shown, the electronic expansion valve regulating device may include:

[0116] The acquisition module 1001 is used to acquire the compressor's exhaust superheat and return superheat, as well as the refrigerant-water flow temperature difference between the refrigerant and the water flow in the water-side heat exchanger.

[0117] The determination module 1002 is used to determine the adjustment order of each abnormal operating parameter based on the influence factor of each abnormal operating parameter on the air source heat pump if at least two abnormal operating parameters exist among the exhaust superheat, the return superheat and the refrigerant water flow temperature difference.

[0118] The control module 1003 is used to adjust the opening of the electronic expansion valve according to each of the abnormal operating parameters and the adjustment sequence of the abnormal operating parameters until each of the abnormal operating parameters returns to normal.

[0119] Optionally, the determining module 1002 is also used for:

[0120] Obtain the reliability impact score and performance impact score corresponding to the abnormal operating parameters;

[0121] The reliability impact score and the performance impact score are weighted according to preset weights to obtain the impact factor.

[0122] Optionally, the acquisition module 1001 is also used for:

[0123] If the air source heat pump is in cooling mode, the refrigerant gas pipe temperature of the air source heat pump and the outlet water temperature of the water-side heat exchanger are obtained, and the refrigerant water flow temperature difference is determined based on the refrigerant gas pipe temperature and the outlet water temperature.

[0124] If the air source heat pump is in heating mode, the refrigerant liquid pipe temperature of the air source heat pump and the inlet water temperature of the water-side heat exchanger are obtained, and the refrigerant water flow temperature difference is determined based on the refrigerant liquid pipe temperature and the inlet water temperature.

[0125] Optionally, the electronic expansion valve regulating device may further include:

[0126] A pre-start module is used to receive the start command of the air source heat pump;

[0127] Obtain the operating environment parameters of the air source heat pump and the setting parameters corresponding to the start command;

[0128] The initial opening degree of the electronic expansion valve and its corresponding running time are determined based on the operating environment parameters, the set parameters, and the preset standard working comparison table.

[0129] The electronic expansion valve is controlled to operate according to the initial opening degree. When the operating time reaches the specified operating time, the superheat of the compressor's exhaust gas and return gas, as well as the temperature difference between the refrigerant and water flow in the water-side heat exchanger, are obtained.

[0130] Optionally, the electronic expansion valve regulating device may further include:

[0131] An abnormal trend judgment module is used to determine the abnormal trend of the abnormal operating parameters based on the comparison results between each abnormal operating parameter and its corresponding preset operating range.

[0132] When the abnormal trends are consistent, the target change opening of the electronic expansion valve corresponding to each abnormal operating parameter is determined based on the difference between each abnormal operating parameter and the preset operating range, and the opening of the electronic expansion valve is adjusted according to the maximum target change opening.

[0133] When the abnormal trends are inconsistent, the adjustment order of each abnormal operating parameter is determined based on the influence factor of each abnormal operating parameter on the air source heat pump.

[0134] Optionally, the control module 1003 is also used for:

[0135] Based on each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the target abnormal operating parameters to be adjusted are obtained.

[0136] Obtain the difference between the target abnormal operating parameter and the preset operating range corresponding to the target abnormal operating parameter;

[0137] The target opening degree of the electronic expansion valve is determined based on the difference and the preset proportional coefficient, and the opening degree of the electronic expansion valve is adjusted to the target opening degree.

[0138] Optionally, the control module 1003 is also used for:

[0139] Based on each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the target abnormal operating parameters to be adjusted are obtained.

[0140] If the target abnormal operating parameter is lower than the corresponding preset operating range, the opening of the electronic expansion valve is adjusted to be reduced.

[0141] If the target abnormal operating parameter is higher than the corresponding preset operating range, the opening of the electronic expansion valve will be adjusted to increase.

[0142] In this embodiment, the compressor's exhaust superheat and return superheat, as well as the refrigerant-water flow temperature difference in the water-side heat exchanger, are first obtained. If at least two of the exhaust superheat, return superheat, and refrigerant-water flow temperature differences are abnormal operating parameters, the adjustment order of each abnormal operating parameter is determined based on the influence factor of each abnormal operating parameter on the air source heat pump. The opening of the electronic expansion valve is adjusted according to each abnormal operating parameter and the adjustment order, until each abnormal operating parameter returns to normal. Abnormalities in exhaust superheat, return superheat, and water-side heat exchanger operation will all affect the operation of the air source heat pump. These abnormalities can impact the reliability and stability of the air source heat pump to varying degrees. Based on the influence factors of these parameters on the reliability and efficiency of the air source heat pump, and ensuring that the operating parameters with a greater impact on reliability are within the normal range, the electronic expansion valve is further adjusted according to the operating parameters that ensure efficiency. This determines the adjustment sequence among the abnormal operating parameters. Based on each abnormal operating parameter and the adjustment sequence, the opening of the electronic expansion valve is controlled one by one according to the abnormal operating parameters until all abnormal operating parameters return to normal, allowing the air source heat pump to operate reliably and efficiently.

[0143] like Figure 6 As shown, Figure 6This is a schematic diagram of the structure of an air source heat pump provided in an embodiment of the present invention. The air source heat pump 1100 includes a processor 1101 with one or more processing cores, a memory 1102 with one or more computer-readable storage media, and a computer program stored in the memory 1102 and executable on the processor. The processor 1101 and the memory 1102 are electrically connected. Those skilled in the art will understand that the air source heat pump structure shown in the figure does not constitute a limitation on the air source heat pump, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0144] The processor 1101 is the control center of the air source heat pump 1100. It connects to various parts of the air source heat pump 1100 via various interfaces and lines. By running or loading software programs and / or units stored in the memory 1102, and by calling data stored in the memory 1102, it executes various functions and processes data of the air source heat pump 1100, thereby providing overall monitoring of the air source heat pump 1100. The processor 1101 can be a CPU, GPU, network processor (NP), etc., and can implement or execute the methods, steps, and logic diagrams disclosed in the embodiments of this invention.

[0145] In this embodiment of the invention, the processor 1101 in the air source heat pump 1100 loads the instructions corresponding to the processes of one or more application programs into the memory 1102 according to the following steps, and the processor 1101 runs the application programs stored in the memory 1102 to realize various functions, such as:

[0146] The exhaust superheat and return superheat of the air source heat pump, as well as the temperature difference between the refrigerant and the water flow in the water-side heat exchanger, are obtained.

[0147] If at least two of the exhaust superheat, return superheat, and refrigerant water flow temperature difference are abnormal operating parameters, the adjustment order of each abnormal operating parameter is determined according to the influence factor of each abnormal operating parameter on the air source heat pump.

[0148] According to each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the opening of the electronic expansion valve is adjusted until each of the abnormal operating parameters returns to normal.

[0149] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0150] Optional, such as Figure 6As shown, the air source heat pump 1100 also includes: a touch display screen 1103, an radio frequency circuit 1104, an audio circuit 1105, an input unit 1106, and a power supply 1107. The processor 1101 is electrically connected to the touch display screen 1103, the radio frequency circuit 1104, the audio circuit 1105, the input unit 1106, and the power supply 1107. Those skilled in the art will understand that... Figure 6 The air source heat pump structure shown does not constitute a limitation on air source heat pumps and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0151] The touch display screen 1103 can be used to display a graphical user interface (GUI) and receive operation commands generated by the user interacting with the GUI. The touch display screen 1103 may include a display panel and a touch panel. The display panel can be used to display information input by the user or information provided to the user, as well as various GUIs of the air source heat pump. These GUIs can be composed of graphics, text, icons, video, and any combination thereof. Optionally, the display panel can be configured using a liquid crystal display (LCD), organic light-emitting diode (OLED), or other similar technologies. The touch panel can be used to collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near the touch panel), and generate corresponding operation commands, which then execute the corresponding program. Optionally, the touch panel may include a touch detection device and a touch controller. The touch detection device detects the user's touch location and the signal generated by the touch operation, transmitting the signal to the touch controller. The touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends it to the processor 1101. It can also receive and execute commands from the processor 1101. The touch panel can cover the display panel. When the touch panel detects a touch operation on or near it, it transmits the information to the processor 1101 to determine the type of touch event. Subsequently, the processor 1101 provides corresponding visual output on the display panel based on the type of touch event. In this embodiment, the touch panel and the display panel can be integrated into the touch display screen 1103 to achieve input and output functions. However, in some embodiments, the touch panel and the touch display screen 1103 can be used as two independent components to achieve input and output functions. That is, the touch display screen 1103 can also be used as part of the input unit 1106 to achieve input functions.

[0152] The radio frequency circuit 1104 can be used to transmit and receive radio frequency signals to establish wireless communication with network devices or other air source heat pumps via wireless communication, and to transmit and receive signals with network devices or other air source heat pumps.

[0153] Audio circuitry 1105 can be used to provide an audio interface between the user and the air source heat pump via a speaker and a microphone. Audio circuitry 1105 can convert received audio data into electrical signals and transmit them to the speaker, where the speaker converts them into sound signals for output. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuitry 1105, converted back into audio data, and processed by processor 1101. The audio data is then transmitted via radio frequency circuitry 1104 to, for example, another air source heat pump, or output to memory 1102 for further processing. Audio circuitry 1105 may also include an earphone jack to provide communication between external headphones and the air source heat pump.

[0154] The input unit 1106 can be used to receive input numbers, characters, or user characteristic information (such as fingerprints, iris, facial information, etc.), and to generate keyboard, mouse, joystick, optical, or trackball signal inputs related to user settings and function control.

[0155] Power supply 1107 supplies power to the various components of air source heat pump 1100. Optionally, power supply 1107 can be logically connected to processor 1101 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. Power supply 1107 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0156] although Figure 6 As not shown in the diagram, the air source heat pump 1100 may also include a camera, sensor, wireless fidelity module, Bluetooth module, etc., which will not be described in detail here.

[0157] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0158] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0159] Therefore, embodiments of the present invention provide a computer-readable storage medium storing a plurality of computer programs, which can be loaded by a processor to execute any of the electronic expansion valve adjustment methods provided in the embodiments of the present invention. The computer program can execute the following steps of the electronic expansion valve adjustment method:

[0160] The exhaust superheat and return superheat of the air source heat pump, as well as the temperature difference between the refrigerant and the water flow in the water-side heat exchanger, are obtained.

[0161] If at least two of the exhaust superheat, return superheat, and refrigerant water flow temperature difference are abnormal operating parameters, the adjustment order of each abnormal operating parameter is determined according to the influence factor of each abnormal operating parameter on the air source heat pump.

[0162] According to each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the opening of the electronic expansion valve is adjusted until each of the abnormal operating parameters returns to normal.

[0163] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0164] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0165] Since the computer program stored in the computer-readable storage medium can execute any of the electronic expansion valve adjustment methods provided in the embodiments of the present invention, the beneficial effects that any of the electronic expansion valve adjustment methods provided in the embodiments of the present invention can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.

[0166] In the above embodiments of the electronic expansion valve regulating device, computer-readable storage medium, air source heat pump, and computer program product, the descriptions of each embodiment have different focuses. Parts not described in detail in a particular embodiment can be referred to in the relevant descriptions of other embodiments. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process and beneficial effects of the above-described electronic expansion valve regulating device, computer-readable storage medium, computer program product, air source heat pump, and their corresponding units can be referred to the description of the electronic expansion valve regulating method in the above embodiments, and will not be repeated here.

[0167] The foregoing has provided a detailed description of an electronic expansion valve adjustment method, an electronic expansion valve adjustment device, an air source heat pump, a computer-readable storage medium, and a computer program product provided by embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for adjusting an electronic expansion valve, characterized in that, Applied to an air-source heat pump, the air-source heat pump including a compressor, a water-side heat exchanger, and an electronic expansion valve, the method includes: The discharge superheat and return superheat of the compressor, as well as the temperature difference between the refrigerant and the water flow in the water-side heat exchanger, are obtained. If at least two of the exhaust superheat, return superheat, and refrigerant water flow temperature difference are abnormal operating parameters, the adjustment order of each abnormal operating parameter is determined according to the influence factor of each abnormal operating parameter on the air source heat pump. According to each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the opening of the electronic expansion valve is adjusted until each of the abnormal operating parameters returns to normal.

2. The electronic expansion valve adjustment method as described in claim 1, characterized in that, Before determining the adjustment order of each abnormal operating parameter based on its influence factor on the air source heat pump, the following steps are included: Obtain the relative abnormal value, reliability impact score, and performance impact score between the abnormal operating parameters and their corresponding preset operating range; The relative outlier, the reliability impact score, and the effectiveness impact score are weighted according to preset weights to obtain the impact factor.

3. The electronic expansion valve adjustment method as described in claim 1, characterized in that, The acquisition of the exhaust superheat and return superheat of the air source heat pump, and the refrigerant-water flow temperature difference between the refrigerant and the water flow in the water-side heat exchanger, includes: If the air source heat pump is in cooling mode, the refrigerant gas pipe temperature of the air source heat pump and the outlet water temperature of the water-side heat exchanger are obtained, and the refrigerant water flow temperature difference is determined based on the refrigerant gas pipe temperature and the outlet water temperature. If the air source heat pump is in heating mode, the refrigerant liquid pipe temperature of the air source heat pump and the inlet water temperature of the water-side heat exchanger are obtained, and the refrigerant water flow temperature difference is determined based on the refrigerant liquid pipe temperature and the inlet water temperature.

4. The electronic expansion valve adjustment method as described in claim 1, characterized in that, Before obtaining the exhaust superheat and return superheat of the compressor, and the refrigerant-water flow temperature difference between the refrigerant and the water flow in the water-side heat exchanger, the method further includes: Receive the start command of the air source heat pump; Obtain the operating environment parameters of the air source heat pump and the setting parameters corresponding to the start command; The initial opening degree of the electronic expansion valve and its corresponding running time are determined based on the operating environment parameters, the set parameters, and the preset standard working comparison table. The electronic expansion valve is controlled to operate according to the initial opening degree. When the operating time reaches the specified operating time, the superheat of the compressor's exhaust gas and return gas, as well as the temperature difference between the refrigerant and water flow in the water-side heat exchanger, are obtained.

5. The electronic expansion valve adjustment method as described in claim 1, characterized in that, Before determining the adjustment order of each abnormal operating parameter based on its influence factor on the air source heat pump, the method further includes: Based on the comparison results between each abnormal operating parameter and its corresponding preset operating range, the abnormal trend of the abnormal operating parameter is determined. When the abnormal trends are consistent, the target change opening of the electronic expansion valve corresponding to each abnormal operating parameter is determined based on the difference between each abnormal operating parameter and the preset operating range, and the opening of the electronic expansion valve is adjusted according to the maximum target change opening. When the abnormal trends are inconsistent, the adjustment order of each abnormal operating parameter is determined based on the influence factor of each abnormal operating parameter on the air source heat pump.

6. The electronic expansion valve adjustment method as described in claim 1, characterized in that, The step of adjusting the opening of the electronic expansion valve according to each of the abnormal operating parameters and the adjustment order of the abnormal operating parameters includes: Based on each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the target abnormal operating parameters to be adjusted are obtained. Obtain the difference between the target abnormal operating parameter and the preset operating range corresponding to the target abnormal operating parameter; The target opening degree of the electronic expansion valve is determined based on the difference and the preset proportional coefficient, and the opening degree of the electronic expansion valve is adjusted to the target opening degree.

7. The electronic expansion valve adjustment method as described in claim 1, characterized in that, The step of adjusting the opening of the electronic expansion valve according to each of the abnormal operating parameters and the adjustment order of the abnormal operating parameters includes: Based on each of the abnormal operating parameters and the order in which the abnormal operating parameters are adjusted, the target abnormal operating parameters to be adjusted are obtained. If the target abnormal operating parameter is lower than the corresponding preset operating range, the opening of the electronic expansion valve is adjusted to be reduced. If the target abnormal operating parameter is higher than the corresponding preset operating range, the opening of the electronic expansion valve will be adjusted to increase.

8. An electronic expansion valve regulating device, characterized in that, The electronic expansion valve regulating device includes: The acquisition module is used to acquire the compressor's exhaust superheat and return superheat, as well as the refrigerant-water flow temperature difference between the refrigerant and the water flow in the water-side heat exchanger. The determination module is used to determine the adjustment order of each abnormal operating parameter based on the influence factor of each abnormal operating parameter on the air source heat pump if at least two abnormal operating parameters exist among the exhaust superheat, the return superheat, and the refrigerant water flow temperature difference. The control module is used to adjust the opening of the electronic expansion valve according to each of the abnormal operating parameters and the adjustment sequence of the abnormal operating parameters, until each of the abnormal operating parameters returns to normal.

9. An air source heat pump, characterized in that, The device includes a processor and a memory, the memory storing multiple instructions; the processor loads instructions from the memory to perform the steps of the electronic expansion valve adjustment method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a plurality of instructions adapted for loading by a processor to perform the steps of the electronic expansion valve adjustment method as described in any one of claims 1 to 7.

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