Electronic expansion valve control method and device, heat pump system, equipment and medium

Abstract

The invention discloses an electronic expansion valve control method and device, a heat pump system, equipment and a medium. The method comprises the steps that current operation parameters of the heat pump system are obtained; the current operation parameters comprise the actual exhaust temperature, the current environment temperature, the current water temperature and the target exhaust temperature range; the opening range of the electronic expansion valve is determined according to the current environment temperature and the current water temperature; and the opening degree of the electronic expansion valve is adjusted according to the actual exhaust temperature, the target exhaust temperature range and the opening degree range of the electronic expansion valve, so that the actual exhaust temperature is controlled to be kept within the target exhaust temperature range, and the situation that a heat pump system is too hot and prone to being in an unstable state due to too high exhaust temperature is avoided. Therefore, the output stability of the system is improved, the service life of the system is effectively prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of heat pump systems, and particularly to a method and device for controlling an electronic expansion valve, a heat pump system, equipment, and a medium. Background Art

[0002] As a throttling element, an electronic expansion valve can usually be applied in an air-conditioning cooling system or a hot water supply system. By controlling the opening degree of the electronic expansion valve, the flow rate of the refrigerant or the outlet water temperature is controlled to achieve the refrigeration or heating effect. However, in the large temperature difference mode of the heat pump refrigerant system, a higher outlet water temperature requires a higher exhaust gas temperature on the refrigerant side of the unit, and the sensible heat is relied on to increase the outlet water temperature. When the exhaust gas temperature is high, the system is prone to be in an unstable state, and the operating frequency of the compressor or the opening degree of the electronic expansion valve fluctuates frequently, making it difficult to maintain a stable capacity output to keep the high outlet water temperature. When the exhaust gas temperature is too low, the heat exchange between the refrigerant and the water side is insufficient, and the outlet water temperature cannot reach the target high water temperature. Summary of the Invention

[0003] Embodiments of the present application provide a method and device for controlling an electronic expansion valve, a heat pump system, equipment, and a medium. This method can avoid the problem that the heat pump system is prone to be in an unstable state due to too high exhaust gas temperature, or the problem of system energy efficiency decline caused by too low exhaust gas temperature, thereby improving the stability of system output, effectively extending the service life of the system, and reducing the maintenance cost.

[0004] In a first aspect, embodiments of the present application provide a method for controlling an electronic expansion valve, including:

[0005] Obtain the current operating parameters of the heat pump system; the current operating parameters include the actual exhaust gas temperature, the current ambient temperature, the current water temperature, and the target exhaust gas temperature range;

[0006] Determine the opening degree range of the electronic expansion valve according to the current ambient temperature and the current water temperature;

[0007] Adjust the opening degree of the electronic expansion valve according to the actual exhaust gas temperature, the target exhaust gas temperature range, and the opening degree range of the electronic expansion valve.

[0008] In a possible implementation manner, the current operating parameters further include the injection port temperature difference; the method further includes:

[0009] When the actual exhaust gas temperature meets the target exhaust gas temperature range, adjust the opening degree of the electronic expansion valve according to the injection port temperature difference;

[0010] The adjusting the opening degree of the electronic expansion valve according to the actual exhaust gas temperature, the target exhaust gas temperature range, and the opening degree range of the electronic expansion valve includes:

[0011] When the actual exhaust gas temperature does not meet the above-mentioned target exhaust gas temperature range, adjust the opening degree of the electronic expansion valve according to the above-mentioned actual exhaust gas temperature and the opening degree range of the above-mentioned electronic expansion valve.

[0012] In a possible implementation manner, the above-mentioned adjusting the opening degree of the electronic expansion valve according to the temperature difference between the injection ports includes:

[0013] When the temperature difference between the injection ports is greater than the temperature difference threshold of the injection ports, increase the opening degree of the electronic expansion valve;

[0014] When the temperature difference between the injection ports is less than or equal to the temperature difference threshold of the injection ports, adjust the opening degree of the electronic expansion valve, or control the opening degree of the electronic expansion valve to remain unchanged.

[0015] In a possible implementation manner, the above-mentioned target exhaust gas temperature range includes a target maximum exhaust gas temperature and / or a target minimum exhaust gas temperature;

[0016] The above-mentioned adjusting the opening degree of the electronic expansion valve according to the above-mentioned actual exhaust gas temperature and the opening degree range of the above-mentioned electronic expansion valve when the above-mentioned actual exhaust gas temperature does not meet the above-mentioned target exhaust gas temperature range includes:

[0017] When the above-mentioned actual exhaust gas temperature is greater than the above-mentioned target maximum exhaust gas temperature, increase the opening degree of the electronic expansion valve according to the above-mentioned actual exhaust gas temperature and the opening degree range of the above-mentioned electronic expansion valve;

[0018] When the above-mentioned actual exhaust gas temperature is less than the above-mentioned target minimum exhaust gas temperature, decrease the opening degree of the electronic expansion valve according to the above-mentioned actual exhaust gas temperature and the opening degree range of the above-mentioned electronic expansion valve.

[0019] In a possible implementation manner, the above-mentioned increasing the opening degree of the electronic expansion valve according to the above-mentioned actual exhaust gas temperature and the opening degree range of the above-mentioned electronic expansion valve when the above-mentioned actual exhaust gas temperature is greater than the above-mentioned target maximum exhaust gas temperature includes:

[0020] When the above-mentioned actual exhaust gas temperature is greater than the above-mentioned target maximum exhaust gas temperature, increase the opening degree of the electronic expansion valve at a target valve opening rate according to the above-mentioned actual exhaust gas temperature and the opening degree range of the above-mentioned electronic expansion valve;

[0021] The above-mentioned decreasing the opening degree of the electronic expansion valve according to the above-mentioned actual exhaust gas temperature and the opening degree range of the above-mentioned electronic expansion valve when the above-mentioned actual exhaust gas temperature is less than the above-mentioned target minimum exhaust gas temperature includes:

[0022] When the actual exhaust gas temperature is less than the target minimum exhaust gas temperature, the opening degree of the electronic expansion valve is decreased at a target valve closing rate according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve.

[0023] In a possible implementation, when the actual exhaust gas temperature is less than the first exhaust gas temperature, the target valve opening rate is the first valve opening rate; when the actual exhaust gas temperature is greater than or equal to the first exhaust gas temperature, the target valve opening rate is the second valve opening rate; the first exhaust gas temperature is greater than the target maximum exhaust gas temperature; the second valve opening rate is greater than the first valve opening rate;

[0024] When the actual exhaust gas temperature is less than the second exhaust gas temperature, the target valve closing rate is the first valve closing rate; when the actual exhaust gas temperature is greater than or equal to the second exhaust gas temperature, the target valve closing rate is the second valve closing rate; the second exhaust gas temperature is less than the target minimum exhaust gas temperature; the second valve closing rate is less than the first valve closing rate.

[0025] In a possible implementation, the opening degree range of the electronic expansion valve includes the maximum opening degree of the electronic expansion valve and / or the minimum opening degree of the electronic expansion valve;

[0026] When the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, increasing the opening degree of the electronic expansion valve at a target valve opening rate according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve includes:

[0027] When the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, increasing the opening degree of the electronic expansion valve at a target valve opening rate according to the actual exhaust gas temperature; when the adjusted opening degree of the electronic expansion valve is greater than the maximum opening degree of the electronic expansion valve, adjusting the adjusted opening degree of the electronic expansion valve to the maximum opening degree of the electronic expansion valve;

[0028] When the actual exhaust gas temperature is less than the target minimum exhaust gas temperature, decreasing the opening degree of the electronic expansion valve at a target valve closing rate according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve includes:

[0029] When the actual exhaust gas temperature is less than the target minimum exhaust gas temperature, decreasing the opening degree of the electronic expansion valve at a target valve closing rate according to the actual exhaust gas temperature; when the adjusted opening degree of the electronic expansion valve is less than the minimum opening degree of the electronic expansion valve, adjusting the adjusted opening degree of the electronic expansion valve to the minimum opening degree of the electronic expansion valve.

[0030] In a possible implementation, the opening range of the above electronic expansion valve includes the maximum opening of the electronic expansion valve and / or the minimum opening of the electronic expansion valve;

[0031] In the case that the actual exhaust temperature is greater than the target maximum exhaust temperature, increasing the opening of the electronic expansion valve at a target valve opening rate according to the actual exhaust temperature and the opening range of the electronic expansion valve includes:

[0032] In the case that the actual exhaust temperature is greater than the target maximum exhaust temperature, predicting the opening of the adjusted electronic expansion valve according to the target valve opening rate; the target valve opening rate is determined according to the actual exhaust temperature, and the actual exhaust temperature changes with the change of the opening of the electronic expansion valve;

[0033] In the case that it is predicted that the opening of the adjusted electronic expansion valve is less than or equal to the maximum opening of the electronic expansion valve, increasing the opening of the electronic expansion valve at the target valve opening rate;

[0034] In the case that it is predicted that the opening of the adjusted electronic expansion valve is greater than the maximum opening of the electronic expansion valve, adjusting the opening of the electronic expansion valve to the maximum opening of the electronic expansion valve;

[0035] In the case that the actual exhaust temperature is less than the target minimum exhaust temperature, decreasing the opening of the electronic expansion valve at a target valve closing rate according to the actual exhaust temperature and the opening range of the electronic expansion valve includes:

[0036] In the case that the actual exhaust temperature is less than the target minimum exhaust temperature, predicting the opening of the adjusted electronic expansion valve according to the target valve closing rate; the target valve closing rate is determined according to the actual exhaust temperature, and the actual exhaust temperature changes with the change of the opening of the electronic expansion valve;

[0037] In the case that it is predicted that the opening of the adjusted electronic expansion valve is greater than or equal to the minimum opening of the electronic expansion valve, decreasing the opening of the electronic expansion valve at the target valve closing rate;

[0038] In the case that it is predicted that the opening of the adjusted electronic expansion valve is less than the minimum opening of the electronic expansion valve, adjusting the opening of the electronic expansion valve to the minimum opening of the electronic expansion valve.

[0039] In a possible implementation, after obtaining the current operating parameters of the heat pump system, the method further includes:

[0040] Judging whether the current operating parameters meet the preset conditions;

[0041] When the above current operating parameters do not meet the above preset conditions, control the opening degree of the above electronic expansion valve to remain unchanged;

[0042] When the above current operating parameters meet the above preset conditions, perform the step of determining the opening range of the electronic expansion valve according to the above current ambient temperature and the above current water temperature.

[0043] In a second aspect, an embodiment of the present application provides an electronic expansion valve control device, including:

[0044] An acquisition module, configured to acquire the current operating parameters of the heat pump system; the above current operating parameters include the actual exhaust gas temperature, the current ambient temperature, the current water temperature, and the target exhaust gas temperature range;

[0045] A determination module, configured to determine the opening range of the electronic expansion valve according to the above current ambient temperature and the above current water temperature;

[0046] An adjustment module, configured to adjust the opening degree of the electronic expansion valve according to the above actual exhaust gas temperature, the above target exhaust gas temperature range, and the above opening range of the electronic expansion valve.

[0047] In a third aspect, an embodiment of the present application provides an electronic device, including: an electronic expansion valve and a controller; wherein, the above electronic expansion valve is used to control the refrigerant flow rate in the above heat pump system to control the actual exhaust gas temperature within the target exhaust gas temperature range, and the above controller is used to execute the method steps provided in the first aspect or any possible implementation manner of the first aspect of the embodiment of the present application.

[0048] In a fourth aspect, an embodiment of the present application provides an electronic device, including: a processor and a memory; wherein, the above memory stores executable program codes, and the above processor runs a program corresponding to the above executable program codes by reading the executable program codes stored in the above memory, so as to execute the method steps provided in the first aspect or any possible implementation manner of the first aspect of the embodiment of the present application.

[0049] In a fifth aspect, an embodiment of the present application provides a computer storage medium, the above computer storage medium stores multiple instructions, and the above instructions are suitable for being loaded and executed by a processor to execute the method steps provided in the first aspect or any possible implementation manner of the first aspect of the embodiment of the present application.

[0050] In the embodiments of the present application, on the one hand, the opening range of the electronic expansion valve is determined according to the current ambient temperature and the current water temperature, and the opening of the electronic expansion valve is adjusted according to the opening range of the electronic expansion valve, which can prevent the problem that the refrigerant flow rate is too large or too small due to over-regulation during the control process of the electronic expansion valve, affecting the actual exhaust temperature, and can improve the effect and stability of the heat pump system; on the other hand, the opening of the electronic expansion valve is also adjusted according to the actual exhaust temperature and the target exhaust temperature range, so as to effectively control the actual exhaust temperature of the heat pump system within the target exhaust temperature range, avoiding both the problem that the heat pump system is prone to an unstable state due to too high actual exhaust temperature, the operating frequency of the compressor or the opening of the electronic expansion valve fluctuates frequently, and it is difficult to maintain a stable power output, and the problem that the heat exchange between the refrigerant and the water side is insufficient due to too low actual exhaust temperature, the outlet water temperature cannot reach the target high water temperature, resulting in a decrease in the energy efficiency of the heat pump system; on the other hand, the stable control of the opening of the electronic expansion valve is realized by combining the actual exhaust temperature, the target exhaust temperature range and the opening range of the electronic expansion valve, improving the stability of the output of the heat pump system, effectively extending the service life of the heat pump system, and reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0052] Figure 1 It is a schematic structural diagram of an electronic expansion valve control system provided by an exemplary embodiment of the present application;

[0053] Figure 2 It is a schematic flow diagram of an electronic expansion valve control method provided by an exemplary embodiment of the present application;

[0054] Figure 3 It is a schematic flow diagram of another electronic expansion valve control method provided by an exemplary embodiment of the present application;

[0055] Figure 4 It is a schematic flow diagram of another electronic expansion valve control method provided by an exemplary embodiment of the present application;

[0056] Figure 5 It is a schematic implementation flow diagram of controlling the opening of the electronic expansion valve at a target opening rate provided by an exemplary embodiment of the present application;

[0057] Figure 6 It is a schematic implementation flow diagram of controlling the opening of the electronic expansion valve at a target closing rate provided by an exemplary embodiment of the present application;

[0058] Figure 7 Schematic diagram of the implementation process of an electronic expansion valve control method provided by an exemplary embodiment of the present application;

[0059] Figure 8 Schematic diagram of the structure of an electronic expansion valve control device provided by an exemplary embodiment of the present application;

[0060] Figure 9 Schematic diagram of the structure of an electronic device provided by an exemplary embodiment of the present application. Detailed implementation manners

[0061] To make the features and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0062] The terms "first", "second", "third", etc. in the specification, claims and drawings of the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0063] Next, please refer to Figure 1 , which is a schematic diagram of the architecture of an electronic expansion valve control system provided by an embodiment of the present application. As Figure 1 shown, the electronic expansion valve control system 100 may include an electronic expansion valve 110 and an electronic expansion valve controller 120. The electronic expansion valve controller 120 includes a data acquisition module 121, a calculation module 122, and an execution module 123.

[0064] The above-mentioned electronic expansion valve 110 is a device that controls the refrigerant flow rate in the heat pump system to control the actual exhaust temperature within the target exhaust temperature range. It is controlled by an electronic expansion valve control method provided by an embodiment of the present application by the electronic expansion valve controller 120.

[0065] The above data acquisition module 121 is used to monitor and acquire the operating parameters under different working conditions during the operation of the heat pump system. The acquisition of the operating parameters is mainly completed by various sensors (such as temperature sensors, pressure sensors, etc.), which provides support for the above calculation module 122 to calculate the opening range of the electronic expansion valve and adjust the opening of the electronic expansion valve, and is a subsystem of the above electronic expansion valve controller 120.

[0066] The above calculation module 122 is used to calculate the opening range of the electronic expansion valve according to the above operating parameters obtained by the data acquisition module 121, and then determine the adjustment method or adjustment amount of the opening of the electronic expansion valve based on the opening range of the electronic expansion valve and the above operating parameters obtained by the data acquisition module 121, and send the adjustment method or adjustment amount of the opening of the electronic expansion valve to the above execution module 123;

[0067] The above execution module 123 is used to adjust the opening of the electronic expansion valve 110 based on the adjustment method or adjustment amount of the opening of the electronic expansion valve sent by the above calculation module 122.

[0068] Next, a method for controlling an electronic expansion valve provided by an exemplary embodiment of the present application will be introduced. Specifically, please refer to Figure 2 , which is a schematic flow chart of a method for controlling an electronic expansion valve provided by an exemplary embodiment of the present application. As Figure 2 shown, the method for controlling the electronic expansion valve includes the following steps:

[0069] S201, obtaining the current operating parameters of the heat pump system, where the current operating parameters include the actual exhaust gas temperature, the current ambient temperature, the current water temperature, and the target exhaust gas temperature range.

[0070] Specifically, the above heat pump system can transfer heat from a low-temperature environment to a high-temperature environment through the circulation of the refrigerant. This process can be used for heating or cooling. The heat pump system mainly realizes the transfer and conversion of heat through the coordinated work of components such as a compressor, a condenser, an electronic expansion valve, and an evaporator. Specifically, the refrigerant absorbs the heat of the low-temperature heat source in the evaporator and then evaporates into superheated steam and enters the compressor. In the compressor, the refrigerant is adiabatically compressed into a high-temperature and high-pressure gas, and then the high-temperature and high-pressure gas enters the condenser and exchanges heat with the external environment (such as air or water), releases heat and condenses into a liquid refrigerant. These heats are used to heat the air or water in the external environment. The liquid refrigerant is throttled by the electronic expansion valve again to become a low-temperature and low-pressure liquid refrigerant, and then enters the evaporator to absorb heat from the surrounding environment and evaporate into steam. The evaporated refrigerant steam is inhaled by the compressor again, and the cycle repeats in this way. The heat pump system mainly exchanges energy with the external environment in the condenser or evaporator, thereby realizing the refrigeration or heating function of the heat pump system.

[0071] The exhaust temperature refers to the refrigerant temperature at the outlet of the compressor in the heat pump system. When the refrigerant is compressed by the compressor, both its temperature and pressure will increase, and the high-temperature and high-pressure gas discharged from the compressor is the exhaust gas. The exhaust temperature is one of the important indicators for evaluating the performance and stability of the heat pump system. An excessively high exhaust temperature will increase the power consumption of the compressor, reduce the energy efficiency ratio of the heat pump system, and thus increase the operating cost; an excessively low exhaust temperature may cause the lubricating oil inside the compressor to deteriorate or frost, which will in turn affect the stability and service life of the compressor. Therefore, the exhaust temperature is usually controlled within a suitable target exhaust temperature range to ensure the efficient operation and stability of the heat pump system and extend the service life of each component. The exhaust temperature can usually be measured by a thermometer or a temperature sensor. By adjusting the opening degree of the electronic expansion valve, the refrigerant flow rate can be controlled, so as to control the actual exhaust temperature within the target exhaust temperature range. When the opening degree of the electronic expansion valve increases, the refrigerant flow rate increases, and the exhaust temperature will decrease. When the opening degree of the electronic expansion valve decreases, the refrigerant flow rate decreases, and the exhaust temperature will increase.

[0072] In order to be able to adjust the opening degree of the electronic expansion valve to achieve the efficient operation and stability of the heat pump system, during the operation of the heat pump system, the current operating parameters of the heat pump system can be obtained. The above-mentioned current operating parameters include the actual exhaust temperature, the current ambient temperature, the current water temperature, and the target exhaust temperature range. The above-mentioned actual exhaust temperature, current ambient temperature, and current water temperature can all be obtained through a temperature sensor, a thermometer, or other instruments that can measure temperature. The above-mentioned current ambient temperature includes the temperature of the environment where the heat pump system is currently located. The above-mentioned current water temperature can be the outlet water temperature of the heat pump system or the water temperature in the water tank, which depends on the specific application scenario and design of the heat pump system. For example, in a heating system, the above-mentioned current water temperature refers to the temperature of the heating hot water; in a refrigeration system, the current water temperature refers to the temperature of the cooling water. The above-mentioned target exhaust temperature range can be determined by multiple factors, including but not limited to the heat pump type, working principle, equipment model, set water temperature, working environment, working state, and load, etc.

[0073] Optionally, after obtaining the current operating parameters of the heat pump system as described above, it is also possible to first determine whether the current operating parameters meet the preset conditions. The preset conditions include at least one of the following: the current subcooling degree at the condenser outlet is within the target range, and the set water temperature of the heat pump is greater than the target water temperature. The target range can be determined by, but is not limited to, the combined determination of a constant range determined by the condenser model and the target subcooling degree. The target subcooling degree refers to the subcooling degree value set to achieve the expected refrigeration or heating effect and system stability. When the current subcooling degree at the condenser outlet is within the target range, it indicates that the current subcooling degree at the condenser outlet fluctuates greatly at this time, and the system may be in an unstable state. Therefore, it is necessary to adjust the opening degree of the electronic expansion valve to keep the system in a stable operating state. When the set water temperature of the heat pump is greater than the target water temperature in the preset conditions, it means that the heat pump system needs to provide more heat to meet the user's needs. At this time, if the opening degree of the electronic expansion valve is not adjusted, it may cause fluctuations in parameters such as the refrigerant flow rate, pressure, and temperature in the system, thereby affecting the stability of the system. By adjusting the opening degree of the electronic expansion valve, the refrigerant flow rate can be precisely controlled to keep the system in a stable operating state. The subcooling degree at the condenser outlet refers to the degree to which the actual temperature of the liquid refrigerant at the condenser outlet is lower than its saturation temperature under the given pressure condition, which is the difference between the saturated condensation temperature and the condenser outlet temperature. The saturated condensation temperature refers to the temperature when the refrigerant changes from gaseous to liquid, which is related to the condenser pressure. The condenser outlet temperature refers to the actual measured temperature of the liquid refrigerant at the condenser outlet. Usually, the condenser outlet temperature should be lower than the saturated condensation temperature, that is, the subcooling degree at the condenser outlet should be a positive number because the refrigerant needs to release heat and transform into a liquid state in the condenser. The set water temperature of the heat pump refers to the water temperature set by the user through the line controller of the heat pump system to control the heating or cooling effect of the heat pump system. The target water temperature can be determined by, but is not limited to, the model, performance, use, and the models or performances of other components of the heat pump system.

[0074] When the current operating parameters do not meet the preset conditions as described above, control the opening degree of the electronic expansion valve to remain unchanged. The fact that the current operating parameters do not meet the preset conditions indicates that the heat pump system can operate normally at this time and can meet the user's needs without the need to provide additional heat. Therefore, in this case, the opening degree of the electronic expansion valve can be left unadjusted and kept unchanged.

[0075] When the above current operating parameters meet the above preset conditions, execute S202 to determine the opening range of the electronic expansion valve according to the above current ambient temperature and the above current water temperature. The fact that the above current operating parameters meet the above preset conditions indicates that the supercooling degree at the outlet of the current condenser fluctuates greatly at this time, and the system may be in an unstable state, or the heat pump system needs to provide more heat to meet the user's needs. If the opening of the electronic expansion valve is not adjusted, it may cause fluctuations in parameters such as the refrigerant flow rate, pressure, and temperature in the system, thereby affecting the stability of the system. Therefore, when the above current operating parameters meet the above preset conditions, the opening of the electronic expansion valve can be adjusted, that is, execute S202 to determine the opening range of the electronic expansion valve according to the above current ambient temperature and the above current water temperature.

[0076] Next, please continue to refer to Figure 2 , such as Figure 2 shown, after obtaining the current operating parameters of the heat pump system in the above S201, the electronic expansion valve control method may further include:

[0077] S202, determine the opening range of the electronic expansion valve according to the current ambient temperature and the current water temperature.

[0078] Specifically, after obtaining the current operating parameters of the heat pump system, in order to avoid the problem of unstable operation of the heat pump system caused by over-adjusting the opening of the electronic expansion valve, it is possible but not limited to first determine an opening range of the electronic expansion valve according to the current ambient temperature and the current water temperature. The above opening range can be determined by looking up a table according to the current ambient temperature and the current water temperature, or can be determined according to the current ambient temperature and the current water temperature according to a preset calculation formula, and the embodiments of the present application do not limit this.

[0079] S203, adjust the opening of the electronic expansion valve according to the actual exhaust temperature, the target exhaust temperature range, and the opening range of the electronic expansion valve.

[0080] Specifically, after determining the opening range of the electronic expansion valve, since the opening of the electronic expansion valve can affect the actual exhaust temperature, in order to ensure the efficient operation of the heat pump system and achieve the control of the actual exhaust temperature within the target exhaust temperature range, the opening of the electronic expansion valve can be adjusted according to the actual exhaust temperature, the target exhaust temperature range, and the opening range of the electronic expansion valve. Adjusting the opening of the electronic expansion valve according to the opening range of the electronic expansion valve can prevent the problem of over-adjustment of the opening. Over-adjustment of the opening of the electronic expansion valve may cause the refrigerant flow rate to be too large or too small, which will not only affect the refrigeration or heating effect and stability of the heat pump system, but also affect the normal operation of other components and shorten the service life of the equipment. The above adjustment method can be manual adjustment by the operator or automatic adjustment, and the embodiments of the present application do not limit this. In some cases, after determining the opening adjustment value of the electronic expansion valve, the operator can, but is not limited to, manually adjust the opening of the electronic expansion valve according to the opening adjustment value through the control panel or remote control. On the basis of manual adjustment, an automatic adjustment function can be introduced as an auxiliary. For example, when the difference between the actual exhaust temperature and the target exhaust temperature is large, the opening of the electronic expansion valve can be quickly adjusted through the automatic adjustment function to reduce the temperature deviation as soon as possible.

[0081] Optionally, the opening adjustment amount of the electronic expansion valve can be determined first according to the difference between the actual exhaust temperature and the target exhaust temperature range, and the opening of the electronic expansion valve can be adjusted according to the opening adjustment amount and the original value of the electronic expansion valve; alternatively, the difference between the actual exhaust temperature and the target exhaust temperature range can be divided into different difference intervals according to the size, and different difference intervals correspond to different adjustment methods or different preset openings, and then the opening of the electronic expansion valve is adjusted according to the adjustment method or the preset opening corresponding to the difference interval where the difference between the actual exhaust temperature and the target exhaust temperature range is located, and the opening range of the electronic expansion valve is used to further control the opening adjustment process of the electronic expansion valve to prevent the problem of over-adjustment.

[0082] In the embodiments of the present application, on the one hand, the opening range of the electronic expansion valve is determined according to the current ambient temperature and the current water temperature, and the opening of the electronic expansion valve is adjusted according to the opening range of the electronic expansion valve, which can prevent the problem that the refrigerant flow rate is too large or too small due to over-regulation during the control process of the electronic expansion valve, affecting the actual exhaust temperature, and can improve the effect and stability of the heat pump system; on the other hand, the opening of the electronic expansion valve is also adjusted according to the actual exhaust temperature and the target exhaust temperature range, so as to effectively control the actual exhaust temperature of the heat pump system within the target exhaust temperature range, avoiding both the problem that the heat pump system is prone to an unstable state due to too high actual exhaust temperature, the compressor operating frequency or the opening of the electronic expansion valve fluctuates frequently, and it is difficult to maintain a stable power output, and the problem that the heat exchange between the refrigerant and the water side is insufficient due to too low actual exhaust temperature, the outlet water temperature cannot reach the target high water temperature, resulting in a decrease in the energy efficiency of the heat pump system; on the other hand, by combining the actual exhaust temperature, the target exhaust temperature range and the opening range of the electronic expansion valve, the stable control of the opening of the electronic expansion valve is realized, the stability of the output of the heat pump system is improved, the service life of the heat pump system is effectively extended, and the maintenance cost is reduced.

[0083] Next, please refer to Figure 3 , which is a schematic flowchart of another method for controlling an electronic expansion valve provided by an exemplary embodiment of the present application. As Figure 3 shown, the method for controlling the electronic expansion valve includes the following steps:

[0084] S301, obtaining the current operating parameters of the heat pump system, where the current operating parameters include the actual exhaust temperature, the current ambient temperature, the current water temperature, the target exhaust temperature range, and the injection port temperature difference.

[0085] Specifically, the above-mentioned injection port temperature difference can be calculated based on the injection inlet temperature and the injection outlet temperature of the injector, or obtained through a sensor. The embodiments of the present application do not limit this. The above-mentioned injection inlet temperature and injection outlet temperature can be obtained by, but are not limited to, a thermometer or a temperature sensor. The above-mentioned injection port temperature difference can directly reflect the state and flow rate of the refrigerant and the energy conversion situation. By the injection port temperature difference, it can be ensured that the refrigerant has appropriate pressure and temperature when entering the injector, thereby optimizing the performance and efficiency of the injector. If the injection port temperature difference is too large, it may cause abnormal operation of the injector, thereby affecting the performance and stability of the entire system. The above-mentioned injector is mainly used to eject low-pressure refrigerant vapor and mix it with high-pressure refrigerant vapor, thereby improving the energy efficiency of the system. The remaining description of S301 is the same as that of S201, and will not be repeated here.

[0086] S302, determining the opening range of the electronic expansion valve according to the current ambient temperature and the current water temperature.

[0087] Specifically, S302 is the same as S202, which will not be elaborated here.

[0088] S303, when the actual exhaust gas temperature meets the target exhaust gas temperature range, adjust the opening degree of the electronic expansion valve according to the temperature difference between the injection ports.

[0089] Specifically, when the actual exhaust gas temperature meets the target exhaust gas temperature range, it indicates that the actual exhaust gas temperature can meet the requirements. However, to ensure the efficient operation of the heat pump system, reduce energy loss and unnecessary power consumption, the opening degree of the electronic expansion valve can be adjusted according to the temperature difference between the injection ports. For example, the opening degree of the electronic expansion valve can be adjusted in preset steps, or the adjustment steps of the electronic expansion valve can be determined according to the temperature difference range where the temperature difference between the injection ports is located. The embodiments of the present application do not limit this.

[0090] Optionally, while adjusting the opening degree of the electronic expansion valve according to the temperature difference between the injection ports, control the opening degree of the electronic expansion valve using the opening degree range of the electronic expansion valve to avoid over-adjustment of the opening degree.

[0091] Optionally, when the actual exhaust gas temperature meets the target exhaust gas temperature range and the temperature difference between the injection ports is greater than the temperature difference threshold of the injection ports (such as but not limited to 30), increase the opening degree of the electronic expansion valve. The above temperature difference threshold of the injection ports can be determined by various factors such as the injector model, other component models, and the current ambient temperature. The fact that the actual exhaust gas temperature meets the target exhaust gas temperature range indicates that the opening degree of the electronic expansion valve is appropriate for the actual exhaust gas temperature at this time. However, the temperature difference between the injection ports is greater than the temperature difference threshold of the injection ports, which may be caused by uneven flow distribution of the refrigerant in the system. Therefore, it is necessary to increase the opening degree of the electronic expansion valve. When the opening degree of the electronic expansion valve increases and the refrigerant flow rate increases, more refrigerant enters the injector, and the temperature difference between the injection ports will also decrease accordingly.

[0092] It can be understood that while adjusting the opening degree of the electronic expansion valve according to the temperature difference between the injection ports, the opening degree of the electronic expansion valve can also be controlled using the opening degree range of the electronic expansion valve to ensure that the opening degree of the electronic expansion valve always remains within the above opening degree range of the electronic expansion valve and avoid over-adjustment of the opening degree.

[0093] In the embodiments of the present application, when the actual exhaust gas temperature meets the target exhaust gas temperature range, adjusting the opening degree of the electronic expansion valve according to the temperature difference between the injection ports can optimize the refrigerant circulation path and flow rate, avoid uneven flow distribution of the refrigerant in the system resulting in partial overcooling or overheating, affecting the overall performance and stability of the system, and is also conducive to timely discovering and solving potential problems or faults in the system to ensure the stable operation of the system.

[0094] Optionally, when the actual exhaust gas temperature meets the target exhaust gas temperature range and the temperature difference between the injection ports is less than or equal to the temperature difference threshold of the injection ports, adjust the opening degree of the electronic expansion valve, or control the opening degree of the electronic expansion valve to remain unchanged. That the temperature difference between the injection ports is less than or equal to the temperature difference threshold of the injection ports indicates that the heat pump system is in a normal operating state at this time, and the actual exhaust gas temperature can meet the requirements. Therefore, the opening degree of the electronic expansion valve can be controlled to remain unchanged, or considering more parameters and operating states, the opening degree of the electronic expansion valve can be adjusted. The above adjustment method can be to increase the opening degree or decrease the opening degree, depending on the specific situation, and the embodiments of the present application do not limit this.

[0095] It can be understood that if it is necessary to adjust the electronic expansion due to other factors, the opening degree of the electronic expansion valve can be adjusted, but not limited to, according to the opening degree range of the electronic expansion valve to ensure that the opening degree of the electronic expansion valve always remains within the above opening degree range and avoid over-adjustment problems.

[0096] Next, please continue to refer to Figure 3 , such as Figure 3 shown, after determining the opening degree range of the electronic expansion valve in S302 according to the current ambient temperature and the current water temperature, the electronic expansion valve control method further includes:

[0097] S304, when the actual exhaust gas temperature does not meet the target exhaust gas temperature range, adjust the opening degree of the electronic expansion valve according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve.

[0098] Specifically, after determining the opening degree range of the electronic expansion valve, if the actual exhaust gas temperature does not meet the target exhaust gas temperature range, it means that the actual exhaust gas temperature has not reached the preset value or cannot meet the user's requirements at this time. Then, the opening degree of the electronic expansion valve can be adjusted according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve. It can be adjusted, but not limited to, according to the absolute value of the difference between the actual exhaust gas temperature and the threshold (target maximum exhaust gas temperature or target minimum exhaust gas temperature) closest to the actual exhaust gas temperature in the target exhaust gas temperature range, and further correct and control the adjusted opening degree of the electronic expansion valve by using the opening degree range of the electronic expansion valve to ensure that the adjusted opening degree of the electronic expansion valve is within the opening degree range of the electronic expansion valve. For example, when the actual exhaust gas temperature is less than the target minimum exhaust gas temperature of the target exhaust gas temperature range, the absolute value of the difference between the actual exhaust gas temperature and the above target minimum exhaust gas temperature can be calculated first. Different absolute values of the difference correspond to different adjustment methods or target opening degree values, and then the opening degree of the electronic expansion valve is adjusted according to the adjustment method or target opening degree value corresponding to the above absolute value of the difference.

[0099] Optionally, the above target exhaust gas temperature range includes a target maximum exhaust gas temperature and / or a target minimum exhaust gas temperature. If the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature or the actual exhaust gas temperature is less than the target minimum exhaust gas temperature, it is determined that the actual exhaust gas temperature does not meet the target exhaust gas temperature range. As Figure 4 shown, in the case where the actual exhaust gas temperature does not meet the target exhaust gas temperature range, the implementation process of adjusting the opening degree of the electronic expansion valve according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve may but is not limited to include:

[0100] S401, in the case where the actual exhaust gas temperature does not meet the target exhaust gas temperature range, determine whether the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature.

[0101] Specifically, in the case where the actual exhaust gas temperature does not meet the target exhaust gas temperature range, first, it can be determined whether the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, so as to determine whether the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature or less than the target minimum exhaust gas temperature, thereby determining whether the opening degree of the electronic expansion valve should be increased or decreased. The relationship between the opening degree of the electronic expansion valve and the actual exhaust gas temperature is that when the opening degree of the electronic expansion valve increases, the actual exhaust gas temperature decreases accordingly; when the opening degree of the electronic expansion valve decreases, the actual exhaust gas temperature increases accordingly.

[0102] S402, in the case where the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, increase the opening degree of the electronic expansion valve according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve.

[0103] Specifically, if the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, it means that the actual exhaust gas temperature needs to be reduced at this time, that is, the opening degree of the electronic expansion valve needs to be increased, then the opening degree of the electronic expansion valve can be increased according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve. It may but is not limited to first calculate the target opening degree value of the electronic expansion valve according to the actual exhaust gas temperature and the target exhaust gas temperature. At the same time, it is necessary to ensure that the target opening degree value is within the opening degree range of the electronic expansion valve, and then control the electronic expansion valve to perform the valve opening action until the actual opening degree value is equal to the target opening degree value, completing the adjustment of the opening degree of the electronic expansion valve.

[0104] Optionally, when the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, the opening degree of the electronic expansion valve is increased at a target valve opening rate according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve. The above-mentioned target valve opening rate can be a preset fixed value, or can be determined according to the difference between the actual exhaust gas temperature and the target maximum exhaust gas temperature and a preset rate adjustment rule. For example, but not limited to, when the difference between the actual exhaust gas temperature and the target maximum exhaust gas temperature or the range where the difference is located is different, the above-mentioned target valve opening rate is different. The embodiments of the present application do not limit this. Through such a design, fine control of the opening degree of the electronic expansion valve can be achieved, so as to more accurately adjust the actual exhaust gas temperature to keep it within the target exhaust gas temperature range. At the same time, combining the opening degree range of the electronic expansion valve to realize the opening degree adjustment of the electronic expansion valve can avoid the occurrence of over-adjustment problems and maintain the stability of the system.

[0105] Optionally, when the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature and the actual exhaust gas temperature is less than the first exhaust gas temperature, the target valve opening rate can be the first valve opening rate; when the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature and the actual exhaust gas temperature is greater than or equal to the first exhaust gas temperature, the target valve opening rate can be the second valve opening rate; the first exhaust gas temperature is greater than the target maximum exhaust gas temperature; the second valve opening rate is greater than the first valve opening rate. That is, when the actual exhaust gas temperature is greater than the first exhaust gas temperature (that is, the difference between the actual exhaust gas temperature and the target maximum exhaust gas temperature is large), a larger target valve opening rate (the second valve opening rate) can be selected to more quickly reduce the actual exhaust gas temperature; when the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature and less than or equal to the first exhaust gas temperature (that is, the difference between the actual exhaust gas temperature and the target maximum exhaust gas temperature is small), a smaller target valve opening rate (the first valve opening rate) can be selected to avoid the actual exhaust gas temperature being too low due to over-adjustment.

[0106] It can be understood that when the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, there can also be multiple first exhaust gas temperatures to form multiple different exhaust gas temperature intervals, and the target valve opening rates corresponding to each temperature interval are inconsistent. The present application does not limit this.

[0107] Further, the opening range of the above electronic expansion valve includes the maximum opening of the electronic expansion valve and / or the minimum opening of the electronic expansion valve. In order to avoid over-regulation while reducing the actual exhaust temperature, when the actual exhaust temperature is greater than the above target maximum exhaust temperature, the opening of the above electronic expansion valve can be increased at a target valve opening rate according to the above actual exhaust temperature to obtain the adjusted opening of the electronic expansion valve. Then, when the adjusted opening of the electronic expansion valve is greater than the maximum opening of the electronic expansion valve, the adjusted opening of the electronic expansion valve is adjusted to the maximum opening of the above electronic expansion valve. In this way, not only can the purpose of reducing the actual exhaust temperature be achieved by increasing the opening of the electronic expansion valve, but also the adjusted opening of the electronic expansion valve can be within the opening range of the electronic expansion valve, avoiding over-regulation problems that affect the energy conversion efficiency and stability of the heat pump system.

[0108] In a possible implementation manner, the above target valve opening rate can be but is not limited to being determined by the number of valve opening steps and the valve opening period. For example, the target valve opening rate can be but is not limited to 4P / 30s, which means that the opening of the electronic expansion valve increases by 4 steps every 30s, where 4P represents the number of valve opening steps and 30s is the valve opening period. In the current valve opening period, when the actual exhaust temperature is greater than the target maximum exhaust temperature and the actual exhaust temperature is less than the first exhaust temperature, the opening of the electronic expansion valve is increased at the above first valve opening rate to obtain the adjusted opening of the electronic expansion valve. If the adjusted opening of the electronic expansion valve exceeds the maximum opening of the electronic expansion valve, the adjusted opening of the electronic expansion valve is adjusted again to the maximum opening of the above electronic expansion valve to ensure the stability of system operation. Since the actual exhaust temperature will decrease correspondingly after the opening of the electronic expansion valve increases, the new actual exhaust temperature is obtained as the initial value for the next valve opening period. Therefore, if the adjusted opening of the electronic expansion valve does not exceed the maximum opening of the electronic expansion valve, the current valve opening period is adjusted and the next valve opening period is entered. In the next valve opening period, the target valve opening rate or the adjustment method of the electronic expansion valve is re-determined according to the above new actual exhaust temperature to control the actual exhaust temperature within the target exhaust temperature range.

[0109] In some possible embodiments, the opening range of the above electronic expansion valve includes the maximum opening of the electronic expansion valve and / or the minimum opening of the electronic expansion valve. As Figure 5 shown, the implementation process of increasing the opening of the electronic expansion valve at a target valve opening rate according to the actual exhaust temperature and the opening range of the electronic expansion valve when the actual exhaust temperature is greater than the target maximum exhaust temperature can also be but is not limited to including:

[0110] S501, when the actual exhaust temperature is greater than the target maximum exhaust temperature, predict the adjusted opening of the electronic expansion valve according to the target valve opening rate.

[0111] Specifically, when the actual exhaust temperature is greater than the target maximum exhaust temperature, the above-mentioned target valve opening rate is determined according to the actual exhaust temperature, and the actual exhaust temperature changes with the opening of the electronic expansion valve. The higher the actual exhaust temperature, the greater the target valve opening rate. When the actual exhaust temperature is greater than the target maximum exhaust temperature, in order to adjust the opening of the electronic expansion valve more intelligently, before adjustment, the opening of the electronic expansion valve after adjustment can be predicted according to the target valve opening rate first.

[0112] S502. When it is predicted that the opening of the electronic expansion valve after adjustment is less than or equal to the maximum opening of the electronic expansion valve, increase the opening of the electronic expansion valve at the target valve opening rate.

[0113] Specifically, the above-mentioned target valve opening rate can be determined by the number of valve opening steps and the valve opening period. For the current valve opening period, before adjustment, the opening of the electronic expansion valve after adjustment can be predicted according to the target valve opening rate first. If it is predicted that the opening of the electronic expansion valve after adjustment is less than or equal to the maximum opening of the electronic expansion valve, it means that adjusting the opening of the electronic expansion valve at the target valve opening rate within the current valve opening period will not cause the opening of the electronic expansion valve after adjustment to exceed the opening range of the electronic expansion valve. Then, the opening of the electronic expansion valve can be increased at the target valve opening rate within the current valve opening period. In this way, the actual exhaust temperature can be reduced to the target exhaust temperature range, improving the efficiency of the heat pump system, and the problem of over-adjustment can be avoided, ensuring the stable operation of the system.

[0114] S503. When it is predicted that the opening of the electronic expansion valve after adjustment is greater than the maximum opening of the electronic expansion valve, adjust the opening of the electronic expansion valve to the maximum opening of the electronic expansion valve.

[0115] Specifically, for the current valve opening period, before adjustment, the opening of the electronic expansion valve after adjustment is predicted according to the target valve opening rate first. If it is predicted that the opening of the electronic expansion valve after adjustment is greater than the maximum opening of the electronic expansion valve, it means that adjusting the opening of the electronic expansion valve at the target valve opening rate within the current valve opening period will cause the opening of the electronic expansion valve after adjustment to exceed the opening range of the electronic expansion valve, resulting in the problem of over-adjustment. To avoid the occurrence of this problem, the opening of the electronic expansion valve can be directly adjusted to the maximum opening of the electronic expansion valve so that the opening of the electronic expansion valve after adjustment is within the opening range of the electronic expansion valve, and to a certain extent, the refrigerant flow rate can be increased to reduce the actual exhaust temperature.

[0116] Optionally, if it is predicted that the opening degree of the adjusted electronic expansion valve is greater than the maximum opening degree of the electronic expansion valve, it can also indicate that there is a problem with the setting of the target valve opening rate. Then, the target valve opening rate can be appropriately reduced, that is, the number of valve opening steps to be adjusted corresponding to the current valve opening cycle is reduced, and the adjusted target valve opening rate is obtained. Then, within the current valve opening cycle, the opening degree of the electronic expansion valve is adjusted according to the adjusted target valve opening rate, so that within the current valve opening cycle, the opening degree of the adjusted electronic expansion valve is always less than or equal to the maximum opening degree of the electronic expansion valve, within the opening degree range of the electronic expansion valve, and the problem of over-regulation is avoided.

[0117] Next, please continue to refer to Figure 4 , such as Figure 4 shown, in the case where the actual exhaust temperature does not meet the target exhaust temperature range, after determining whether the actual exhaust temperature is greater than the target maximum exhaust temperature in S401, the electronic expansion valve control method further includes:

[0118] S403, in the case where the actual exhaust temperature is not greater than the target maximum exhaust temperature, reduce the opening degree of the electronic expansion valve according to the actual exhaust temperature and the opening degree range of the electronic expansion valve.

[0119] Optionally, in the case where the actual exhaust temperature is less than the target minimum exhaust temperature, the opening degree of the electronic expansion valve can be reduced at the target valve closing rate according to the actual exhaust temperature and the opening degree range of the electronic expansion valve. The above target valve closing rate can be a preset fixed value, or can be determined according to the difference between the actual exhaust temperature and the target minimum exhaust temperature and a preset rate adjustment rule. For example, but not limited to, different target valve closing rates correspond to different differences or ranges of differences between the actual exhaust temperature and the target maximum exhaust temperature. The embodiments of the present application do not limit this. Through such a design, fine control of the opening degree of the electronic expansion valve can be achieved, so as to more accurately adjust the actual exhaust temperature to keep it within the target exhaust temperature range. At the same time, combining the opening degree range of the electronic expansion valve to adjust the opening degree of the electronic expansion valve can avoid the occurrence of over-regulation problems and maintain the stability of the system.

[0120] Optionally, when the actual exhaust gas temperature is less than the target minimum exhaust gas temperature and the actual exhaust gas temperature is less than the second exhaust gas temperature, the target valve closing rate can be the first valve closing rate; when the actual exhaust gas temperature is less than the target minimum exhaust gas temperature and greater than or equal to the second exhaust gas temperature, the target valve closing rate can be the second valve closing rate; the second exhaust gas temperature is less than the target minimum exhaust gas temperature; the second valve closing rate is less than the first valve closing rate. That is, when the actual exhaust gas temperature is less than the second exhaust gas temperature (i.e., the difference between the actual exhaust gas temperature and the target minimum exhaust gas temperature is large), a larger target valve closing rate (the first valve closing rate) can be selected to increase the actual exhaust gas temperature faster; when the actual exhaust gas temperature is greater than or equal to the second exhaust gas temperature (i.e., the difference between the actual exhaust gas temperature and the target minimum exhaust gas temperature is small), a smaller target valve closing rate (the second valve closing rate) can be selected to avoid over-regulation resulting in too high an actual exhaust gas temperature.

[0121] It can be understood that when the actual exhaust gas temperature is less than the target minimum exhaust gas temperature, there can also be multiple second exhaust gas temperatures to form multiple different exhaust gas temperature intervals, and the target valve closing rates corresponding to each temperature interval are inconsistent. The present application does not limit this.

[0122] Furthermore, the opening range of the above-mentioned electronic expansion valve includes the maximum opening of the electronic expansion valve and / or the minimum opening of the electronic expansion valve. In order to avoid over-regulation while increasing the actual exhaust gas temperature, when the actual exhaust gas temperature is less than the target minimum exhaust gas temperature, the opening of the electronic expansion valve can be reduced at the target valve closing rate according to the actual exhaust gas temperature to obtain the adjusted opening of the electronic expansion valve. Then, when the adjusted opening of the electronic expansion valve is less than the minimum opening of the electronic expansion valve, the adjusted opening of the electronic expansion valve is adjusted to the minimum opening of the electronic expansion valve. In this way, not only can the purpose of reducing the actual exhaust gas temperature be achieved by increasing the opening of the electronic expansion valve, but also the adjusted opening of the electronic expansion valve can be within the opening range of the electronic expansion valve, avoiding over-regulation problems that affect the energy conversion efficiency and stability of the heat pump system.

[0123] In a possible implementation, the above target valve closing rate can be determined by, but is not limited to, the number of valve closing steps and the valve closing period. In the current valve closing period, when the actual exhaust temperature is less than the target minimum exhaust temperature and the actual exhaust temperature is less than the second exhaust temperature, the opening of the electronic expansion valve is reduced at the above first valve closing rate to obtain the adjusted opening of the electronic expansion valve. If the adjusted opening of the electronic expansion valve is less than the minimum opening of the electronic expansion valve, it indicates that over-regulation has occurred. Then, the adjusted opening of the electronic expansion valve is adjusted again to the minimum opening of the electronic expansion valve to ensure the stability of the system operation. Since the actual exhaust temperature will increase correspondingly after the opening of the electronic expansion valve is reduced, the new actual exhaust temperature is obtained as the initial value for the next valve closing period. Therefore, if the adjusted opening of the electronic expansion valve is not less than the minimum opening of the electronic expansion valve, the current valve closing period is completed and the next valve closing period is entered. In the next valve closing period, the target valve closing rate or the adjustment method of the electronic expansion valve is re-determined according to the above new actual exhaust temperature to control the actual exhaust temperature within the target exhaust temperature range.

[0124] In some possible embodiments, the opening range of the above electronic expansion valve includes the maximum opening of the electronic expansion valve and / or the minimum opening of the electronic expansion valve. As Figure 6 shown, the implementation process of reducing the opening of the electronic expansion valve at the target valve closing rate according to the actual exhaust temperature and the opening range of the electronic expansion valve when the actual exhaust temperature is less than the target minimum exhaust temperature can also be, but is not limited to, including:

[0125] S601. When the actual exhaust temperature is less than the target minimum exhaust temperature, predict the adjusted opening of the electronic expansion valve according to the target valve closing rate.

[0126] Specifically, when the actual exhaust temperature is less than the target minimum exhaust temperature, the target valve closing rate is determined according to the actual exhaust temperature, and the actual exhaust temperature changes with the change of the opening of the electronic expansion valve. The smaller the actual exhaust temperature, the greater the target valve closing rate. When the actual exhaust temperature is less than the target minimum exhaust temperature, in order to adjust the opening of the electronic expansion valve more intelligently, the adjusted opening of the electronic expansion valve can be predicted according to the target valve closing rate before adjustment.

[0127] S602. When it is predicted that the adjusted opening of the electronic expansion valve is greater than or equal to the minimum opening of the electronic expansion valve, reduce the opening of the above electronic expansion valve at the target valve closing rate.

[0128] Specifically, the above target valve closing rate can be determined by the number of valve closing steps and the valve closing period. For the current valve closing period, before adjustment, the opening degree of the electronic expansion valve after adjustment can be predicted according to the target valve closing rate. If it is predicted that the opening degree of the electronic expansion valve after adjustment is greater than or equal to the minimum opening degree of the electronic expansion valve, it indicates that adjusting the opening degree of the electronic expansion valve according to the target valve closing rate within the current valve closing period will not cause the opening degree of the electronic expansion valve after adjustment to exceed the opening degree range of the electronic expansion valve. Then, the opening degree of the electronic expansion valve can be reduced according to the target valve closing rate within the current valve closing period. In this way, the actual exhaust temperature can be increased to the target exhaust temperature range, improving the efficiency of the heat pump system, and at the same time, the problem of over-adjustment can be avoided, ensuring the stable operation of the system.

[0129] S603, in the case where it is predicted that the opening degree of the electronic expansion valve after adjustment is less than the minimum opening degree of the electronic expansion valve, adjust the opening degree of the electronic expansion valve to the minimum opening degree of the electronic expansion valve.

[0130] Specifically, for the current valve closing period, before adjustment, the opening degree of the electronic expansion valve after adjustment can be predicted according to the target valve closing rate. If it is predicted that the opening degree of the electronic expansion valve after adjustment is less than the minimum opening degree of the electronic expansion valve, it indicates that adjusting the opening degree of the electronic expansion valve according to the target valve closing rate within the current valve closing period will cause the opening degree of the electronic expansion valve after adjustment to exceed the opening degree range of the electronic expansion valve, resulting in the problem of over-adjustment. To avoid the occurrence of this problem, the opening degree of the electronic expansion valve can be directly adjusted to the minimum opening degree of the electronic expansion valve, so that the opening degree of the electronic expansion valve after adjustment is within the opening degree range of the electronic expansion valve, and to a certain extent, the refrigerant flow rate can be reduced and the actual exhaust temperature can be increased.

[0131] Optionally, if it is predicted that the opening degree of the electronic expansion valve after adjustment is less than the minimum opening degree of the electronic expansion valve, it can also indicate that there is a problem with the setting of the target valve closing rate. Then, the target valve closing rate can be appropriately reduced, that is, the number of valve closing steps to be adjusted corresponding to the current valve closing period is reduced, and the adjusted target valve closing rate is obtained. Then, within the current valve closing period, the opening degree of the electronic expansion valve is adjusted according to the adjusted target valve closing rate, so that within the current valve closing period, the opening degree of the electronic expansion valve after adjustment is always greater than or equal to the minimum opening degree of the electronic expansion valve, within the opening degree range of the electronic expansion valve, and the problem of over-adjustment is avoided.

[0132] Next, please refer to Figure 7 , which is a schematic diagram of the implementation process of an electronic expansion valve control method provided by an embodiment of the present application. As Figure 7As shown in (a), first, the heat pump system needs to satisfy two logical conditions simultaneously to trigger the regulation process of the electronic expansion valve. The above logical conditions include: ① the current supercooling degree at the condenser outlet is within the target range; ② the set water temperature of the heat pump is greater than the target water temperature. Among them, the current supercooling degree at the condenser outlet is calculated based on the condenser outlet temperature and the saturated condensation temperature. The condenser outlet temperature can be detected by a temperature sensor; the saturated condensation temperature can be calculated from the condensation pressure, and the condensation pressure can be detected by a pressure sensor. The target range can be determined by the target supercooling degree, the first constant (for example, but not limited to any value between -2 and 0), and the second constant (for example, but not limited to any value between 1 and 10). The lower limit value of the target range is the sum of the target supercooling degree and the first constant, and the upper limit value of the target range is the sum of the target supercooling degree and the second constant. The above first constant and second constant can be determined by the equipment model of the heat pump system; the target water temperature is, for example, but not limited to any value between 60 degrees and 70 degrees. When the above two conditions are met, set the target exhaust temperature range, which can include the target maximum exhaust temperature and the target minimum exhaust temperature. The target minimum exhaust temperature can be, for example, but not limited to any value between 100 degrees and 103 degrees, and the target maximum exhaust temperature can be, for example, but not limited to any value between 101 degrees and 106 degrees, and the target minimum exhaust temperature is less than the target maximum exhaust temperature. Then, determine the opening range (the maximum opening and the minimum opening) of the electronic expansion valve according to the current ambient temperature and the current water temperature. Finally, determine the adjustment method (opening the valve, closing the valve, or not adjusting) of the electronic expansion valve in different intervals at different rates (the target valve opening rate or the target valve closing rate) according to the actual exhaust temperature, the target exhaust temperature range, and the opening range of the electronic expansion valve.

[0133] Exemplarily, as Figure 7 As shown in (b), first, judge whether the current supercooling degree at the condenser outlet is within the target range and whether the set water temperature of the heat pump is greater than the target water temperature. If not, exit the opening adjustment process of the electronic expansion valve; if so, enter the opening adjustment process of the electronic expansion valve. First, determine the target exhaust temperature range (the target minimum exhaust temperature and the target maximum exhaust temperature), and then calculate the minimum opening and the maximum opening of the electronic expansion valve according to the current ambient temperature and the current water temperature, so as to determine the opening range of the electronic expansion valve.

[0134] Next, first determine whether the current actual exhaust temperature is less than the target minimum exhaust temperature (such as but not limited to 103). If the current actual exhaust temperature is less than the target minimum exhaust temperature, then continue to determine whether the current actual exhaust temperature is less than the second exhaust temperature (such as but not limited to 95). If the current actual exhaust temperature is less than the second exhaust temperature, then reduce the opening of the electronic expansion valve at the first valve closing rate. Then, calculate whether the adjusted opening of the electronic expansion valve is less than the minimum opening of the electronic expansion valve. If the adjusted opening of the electronic expansion valve is less than the minimum opening of the electronic expansion valve, then directly adjust the opening of the electronic expansion valve (the current opening) to the above-mentioned minimum opening of the electronic expansion valve; since the actual exhaust temperature value will also change with the change of the opening of the electronic expansion valve, if the adjusted opening of the electronic expansion valve is not less than the minimum opening of the electronic expansion valve, then execute the step of determining whether the actual exhaust temperature after adjusting the opening is less than the second exhaust temperature again, and repeat the adjustment step in this way.

[0135] If the current actual exhaust temperature is greater than or equal to the second exhaust temperature, then reduce the opening of the electronic expansion valve at the second valve closing rate. Then, calculate whether the adjusted opening of the electronic expansion valve is less than the minimum opening of the electronic expansion valve. If the adjusted opening of the electronic expansion valve is less than the minimum opening of the electronic expansion valve, then adjust the opening of the electronic expansion valve to the minimum opening of the electronic expansion valve; if the adjusted opening of the electronic expansion valve is greater than or equal to the minimum opening of the electronic expansion valve, then execute the step of determining whether the actual exhaust temperature after adjusting the opening is less than the target minimum exhaust temperature again, and repeat the adjustment step in this way.

[0136] If the current actual exhaust gas temperature is greater than or equal to the target minimum exhaust gas temperature, then continue to determine whether the current actual exhaust gas temperature is less than the target maximum exhaust gas temperature (such as but not limited to 105). If the current actual exhaust gas temperature is less than the target maximum exhaust gas temperature, then determine whether the current injection port temperature difference is greater than the injection port temperature difference threshold. When the current injection port temperature difference is greater than the injection port temperature difference threshold, control the opening degree of the electronic expansion valve to increase, so as to reduce the current injection port temperature difference; when the current injection port temperature difference is less than or equal to the injection port temperature difference threshold, control the opening degree of the electronic expansion valve to be freely adjusted (increase the opening degree or decrease the opening degree or not adjust). If the current actual exhaust gas temperature is greater than or equal to the target maximum exhaust gas temperature, then continue to determine whether the current actual exhaust gas temperature is less than the first exhaust gas temperature (such as but not limited to 106). When the current actual exhaust gas temperature is less than the first exhaust gas temperature, increase the opening degree of the electronic expansion valve at the first valve opening rate, and then calculate whether the adjusted opening degree of the electronic expansion valve is greater than the maximum opening degree of the electronic expansion valve. If the adjusted opening degree of the electronic expansion valve is greater than the maximum opening degree of the electronic expansion valve, then adjust the opening degree of the electronic expansion valve (the current opening degree) to the maximum opening degree of the electronic expansion valve; if the adjusted opening degree of the electronic expansion valve is less than or equal to the maximum opening degree of the electronic expansion valve, then execute again the step of determining whether the actual exhaust gas temperature after adjusting the opening degree is less than the target minimum exhaust gas temperature, and repeat the adjustment step in this way.

[0137] When the current actual exhaust gas temperature is greater than or equal to the first exhaust gas temperature, increase the opening degree of the electronic expansion valve at the second valve opening rate, and then calculate whether the adjusted opening degree of the electronic expansion valve is greater than the maximum opening degree of the electronic expansion valve. If the adjusted opening degree of the electronic expansion valve is greater than the maximum opening degree of the electronic expansion valve, then adjust the opening degree of the electronic expansion valve to the maximum opening degree of the electronic expansion valve; if the adjusted opening degree of the electronic expansion valve is less than or equal to the maximum opening degree of the electronic expansion valve, then execute again the step of determining whether the actual exhaust gas temperature after adjusting the opening degree is less than the first exhaust gas temperature, and repeat the adjustment step in this way.

[0138] Next, please refer to Figure 8 , which is a schematic structural diagram of an electronic expansion valve control device provided by an embodiment of the present application.

[0139] As Figure 8 shown, the above-mentioned electronic expansion valve control device 800 may include:

[0140] An acquisition module 810, configured to acquire the current operating parameters of the heat pump system; the above-mentioned current operating parameters include the actual exhaust gas temperature, the current ambient temperature, the current water temperature, and the target exhaust gas temperature range;

[0141] A determination module 820, configured to determine the opening range of the electronic expansion valve according to the above-mentioned current ambient temperature and the above-mentioned current water temperature;

[0142] The adjustment module 830 is configured to adjust the opening degree of the electronic expansion valve according to the actual exhaust temperature, the target exhaust temperature range, and the opening degree range of the electronic expansion valve.

[0143] In a possible implementation manner, the adjustment module 830 includes:

[0144] The first adjustment unit is configured to adjust the opening degree of the electronic expansion valve according to the actual exhaust temperature and the opening degree range of the electronic expansion valve when the actual exhaust temperature does not meet the target exhaust temperature range;

[0145] The second adjustment unit is configured to adjust the opening degree of the electronic expansion valve according to the injection port temperature difference when the actual exhaust temperature meets the target exhaust temperature range.

[0146] In a possible implementation manner, the second adjustment unit is specifically configured to: increase the opening degree of the electronic expansion valve when the injection port temperature difference is greater than the injection port temperature difference threshold; adjust the opening degree of the electronic expansion valve, or control the opening degree of the electronic expansion valve to remain unchanged when the injection port temperature difference is less than or equal to the injection port temperature difference threshold.

[0147] In a possible implementation manner, the first adjustment unit includes:

[0148] The first adjustment subunit is configured to increase the opening degree of the electronic expansion valve according to the actual exhaust temperature and the opening degree range of the electronic expansion valve when the actual exhaust temperature is greater than the target maximum exhaust temperature;

[0149] The second adjustment subunit is configured to decrease the opening degree of the electronic expansion valve according to the actual exhaust temperature and the opening degree range of the electronic expansion valve when the actual exhaust temperature is less than the target minimum exhaust temperature.

[0150] In a possible implementation manner, the first adjustment subunit includes:

[0151] The first adjustment component is configured to increase the opening degree of the electronic expansion valve at a target valve opening rate according to the actual exhaust temperature and the opening degree range of the electronic expansion valve when the actual exhaust temperature is greater than the target maximum exhaust temperature.

[0152] The second adjustment subunit includes:

[0153] The second adjustment component is configured to decrease the opening degree of the electronic expansion valve at a target valve closing rate according to the actual exhaust temperature and the opening degree range of the electronic expansion valve when the actual exhaust temperature is less than the target minimum exhaust temperature.

[0154] In a possible implementation, when the actual exhaust temperature is less than the first exhaust temperature, the target valve opening rate is the first valve opening rate; when the actual exhaust temperature is greater than or equal to the first exhaust temperature, the target valve opening rate is the second valve opening rate; the first exhaust temperature is greater than the target maximum exhaust temperature; the second valve opening rate is greater than the first valve opening rate;

[0155] When the actual exhaust temperature is less than the second exhaust temperature, the target valve closing rate is the first valve closing rate; when the actual exhaust temperature is greater than or equal to the second exhaust temperature, the target valve closing rate is the second valve closing rate; the second exhaust temperature is less than the target minimum exhaust temperature; the second valve closing rate is less than the first valve closing rate.

[0156] In a possible implementation, the first adjustment component is specifically configured to: when the actual exhaust temperature is greater than the target maximum exhaust temperature, increase the opening of the electronic expansion valve at the target valve opening rate according to the actual exhaust temperature; when the adjusted opening of the electronic expansion valve is greater than the maximum opening of the electronic expansion valve, adjust the adjusted opening of the electronic expansion valve to the maximum opening of the electronic expansion valve;

[0157] The second adjustment component is specifically configured to: when the actual exhaust temperature is less than the target minimum exhaust temperature, decrease the opening of the electronic expansion valve at the target valve closing rate according to the actual exhaust temperature; when the adjusted opening of the electronic expansion valve is less than the minimum opening of the electronic expansion valve, adjust the adjusted opening of the electronic expansion valve to the minimum opening of the electronic expansion valve.

[0158] In a possible implementation, the first adjustment component is specifically configured to: when the actual exhaust temperature is greater than the target maximum exhaust temperature, predict the opening of the adjusted electronic expansion valve according to the target valve opening rate; the target valve opening rate is determined according to the actual exhaust temperature, and the actual exhaust temperature changes with the change of the opening of the electronic expansion valve; when it is predicted that the opening of the adjusted electronic expansion valve is less than or equal to the maximum opening of the electronic expansion valve, increase the opening of the electronic expansion valve at the target valve opening rate; when it is predicted that the opening of the adjusted electronic expansion valve is greater than the maximum opening of the electronic expansion valve, adjust the opening of the electronic expansion valve to the maximum opening of the electronic expansion valve;

[0159] The above-mentioned second adjustment component is specifically used for: when the actual exhaust temperature is less than the target minimum exhaust temperature, predicting the opening degree of the electronic expansion valve after adjustment; the target valve closing rate is determined according to the actual exhaust temperature, and the actual exhaust temperature changes with the opening degree of the electronic expansion valve; when it is predicted that the opening degree of the electronic expansion valve after adjustment is greater than or equal to the minimum opening degree of the electronic expansion valve, reducing the opening degree of the electronic expansion valve at the target valve closing rate; when it is predicted that the opening degree of the electronic expansion valve after adjustment is less than the minimum opening degree of the electronic expansion valve, adjusting the opening degree of the electronic expansion valve to the minimum opening degree of the electronic expansion valve.

[0160] In a possible implementation manner, the above-mentioned electronic expansion valve control device 800 further includes:

[0161] A judgment module, configured to judge whether the above-mentioned current operating parameters meet the preset conditions;

[0162] A control module, configured to keep the opening degree of the electronic expansion valve unchanged when the above-mentioned current operating parameters do not meet the above-mentioned preset conditions;

[0163] An execution module, configured to execute the step of determining the opening degree range of the electronic expansion valve according to the above-mentioned current ambient temperature and the above-mentioned current water temperature when the above-mentioned current operating parameters meet the above-mentioned preset conditions.

[0164] The division of each module in the above-mentioned electronic expansion valve control device is only for illustrative purposes. In other embodiments, the electronic expansion valve control device can be divided into different modules as needed to complete all or part of the functions of the above-mentioned electronic expansion valve control device. The implementation of each module in the electronic expansion valve control device provided in the embodiments of this specification can be in the form of a computer program. This computer program can run on a heat pump system. The program module constituted by this computer program can be stored in the memory of the heat pump system. When this computer program is executed by a processor, all or part of the steps of the electronic expansion valve control method described in the embodiments of this specification are implemented.

[0165] Next, please refer to Figure 9 , which is a schematic structural diagram of an electronic device provided by an exemplary embodiment of this specification. As Figure 9 shown, the electronic device 900 may include: at least one processor 910, at least one communication bus 920, a user interface 930, at least one network interface 940, a memory 950, and an electronic expansion valve 960.

[0166] Among them, the communication bus 920 can be used to realize the connection and communication of the above-mentioned various components.

[0167] Among them, the user interface 930 may include buttons, and the optional user interface may further include standard wired interfaces and wireless interfaces.

[0168] Among them, the network interface 940 may optionally include a Bluetooth module, an NFC module, a Wi-Fi module, etc.

[0169] Among them, the electronic expansion valve 960 is used to control the refrigerant flow rate in the heat pump system to ensure the normal operation of the system. It is controlled by the processor 910 according to an electronic expansion valve control method provided by an embodiment of the present application.

[0170] Among them, the processor 910 may include one or more processing cores. The processor 910 connects various parts within the entire electronic device 900 using various interfaces and lines, and by running or executing instructions, programs, code sets, or instruction sets stored in the memory 950, and by calling data stored in the memory 950, it executes various functions of the electronic device 900 and processes data. Optionally, the processor 910 may be implemented in at least one of the hardware forms of DSP, FPGA, and PLA. The processor 910 may integrate one or several combinations of a CPU, a GPU, and a modem, etc. Among them, the CPU mainly processes the operating system, the user interface, and application programs, etc.; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communication. It can be understood that the above-mentioned modem may not be integrated into the processor 910 and may be implemented separately by a single chip.

[0171] Among them, the memory 950 may include RAM and may also include ROM. Optionally, the memory 950 includes a non-transitory computer-readable medium. The memory 950 can be used to store instructions, programs, codes, code sets, or instruction sets. The memory 950 may include a program storage area and a data storage area. Among them, the program storage area may store instructions for implementing the operating system, instructions for at least one function (such as obtaining current operating parameters, determining the opening range of the electronic expansion valve, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store the data involved in the above-mentioned various method embodiments. Optionally, the memory 950 may also be at least one storage device located far from the aforementioned processor 910. As Figure 9 shown, the memory 950, as a computer storage medium, may include an operating system, a network communication module, a user interface module, and program instructions.

[0172] In some possible embodiments, the electronic device 900 may be the aforementioned Figure 8For the electronic expansion valve control device 800 shown, the processor 910 can be used to call the program instructions stored in the memory 950 and specifically perform the following operations: Obtain the current operating parameters of the heat pump system; the above current operating parameters include the actual exhaust gas temperature, the current ambient temperature, the current water temperature, and the target exhaust gas temperature range; Determine the opening range of the electronic expansion valve according to the above current ambient temperature and the above current water temperature; Adjust the opening of the electronic expansion valve according to the above actual exhaust gas temperature, the above target exhaust gas temperature range, and the above opening range of the electronic expansion valve.

[0173] In some possible embodiments, the above current operating parameters further include the injection port temperature difference; the above processor 910 is further used to perform: When the above actual exhaust gas temperature meets the above target exhaust gas temperature range, adjust the opening of the above electronic expansion valve according to the above injection port temperature difference; When the above processor 910 performs the adjustment of the opening of the above electronic expansion valve according to the above actual exhaust gas temperature, the above target exhaust gas temperature range, and the above opening range of the above electronic expansion valve, it is specifically used to perform: When the above actual exhaust gas temperature does not meet the above target exhaust gas temperature range, adjust the opening of the above electronic expansion valve according to the above actual exhaust gas temperature and the above opening range of the above electronic expansion valve.

[0174] In some possible embodiments, when the above processor 910 performs the adjustment of the opening of the above electronic expansion valve according to the above injection port temperature difference, it is specifically used to perform: When the above injection port temperature difference is greater than the injection port temperature difference threshold, increase the opening of the above electronic expansion valve; When the above injection port temperature difference is less than or equal to the above injection port temperature difference threshold, adjust the opening of the above electronic expansion valve, or, control the opening of the above electronic expansion valve to remain unchanged.

[0175] In some possible embodiments, the above target exhaust gas temperature range includes the target maximum exhaust gas temperature and / or the target minimum exhaust gas temperature; When the above processor 910 performs the adjustment of the opening of the above electronic expansion valve according to the above actual exhaust gas temperature and the above opening range of the above electronic expansion valve when the above actual exhaust gas temperature does not meet the above target exhaust gas temperature range, it is specifically used to perform: When the above actual exhaust gas temperature is greater than the above target maximum exhaust gas temperature, increase the opening of the above electronic expansion valve according to the above actual exhaust gas temperature and the above opening range of the above electronic expansion valve; When the above actual exhaust gas temperature is less than the above target minimum exhaust gas temperature, decrease the opening of the above electronic expansion valve according to the above actual exhaust gas temperature and the above opening range of the above electronic expansion valve.

[0176] In some possible embodiments, when the above-mentioned processor 910 increases the opening degree of the electronic expansion valve according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve when the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, it is specifically configured to: when the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, increase the opening degree of the electronic expansion valve at a target valve opening rate according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve;

[0177] When the above-mentioned processor 910 decreases the opening degree of the electronic expansion valve according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve when the actual exhaust gas temperature is less than the target minimum exhaust gas temperature, it is specifically configured to: when the actual exhaust gas temperature is less than the target minimum exhaust gas temperature, decrease the opening degree of the electronic expansion valve at a target valve closing rate according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve.

[0178] In some possible embodiments, when the actual exhaust gas temperature is less than the first exhaust gas temperature, the target valve opening rate is the first valve opening rate; when the actual exhaust gas temperature is greater than or equal to the first exhaust gas temperature, the target valve opening rate is the second valve opening rate; the first exhaust gas temperature is greater than the target maximum exhaust gas temperature; the second valve opening rate is greater than the first valve opening rate;

[0179] When the actual exhaust gas temperature is less than the second exhaust gas temperature, the target valve closing rate is the first valve closing rate; when the actual exhaust gas temperature is greater than or equal to the second exhaust gas temperature, the target valve closing rate is the second valve closing rate; the second exhaust gas temperature is less than the target minimum exhaust gas temperature; the second valve closing rate is less than the first valve closing rate.

[0180] In some possible embodiments, the opening degree range of the electronic expansion valve includes the maximum opening degree of the electronic expansion valve and / or the minimum opening degree of the electronic expansion valve; when the above-mentioned processor 910 increases the opening degree of the electronic expansion valve at a target valve opening rate according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve when the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, it is specifically configured to: when the actual exhaust gas temperature is greater than the target maximum exhaust gas temperature, increase the opening degree of the electronic expansion valve at a target valve opening rate according to the actual exhaust gas temperature; when the adjusted opening degree of the electronic expansion valve is greater than the maximum opening degree of the electronic expansion valve, adjust the adjusted opening degree of the electronic expansion valve to the maximum opening degree of the electronic expansion valve;

[0181] When the actual exhaust gas temperature is lower than the target minimum exhaust gas temperature, the processor 910 reduces the opening degree of the electronic expansion valve at a target valve closing rate according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve, and is specifically configured to perform: when the actual exhaust gas temperature is lower than the target minimum exhaust gas temperature, reduce the opening degree of the electronic expansion valve at a target valve closing rate according to the actual exhaust gas temperature; when the adjusted opening degree of the electronic expansion valve is smaller than the minimum opening degree of the electronic expansion valve, adjust the adjusted opening degree of the electronic expansion valve to the minimum opening degree of the electronic expansion valve.

[0182] In some possible embodiments, the opening degree range of the electronic expansion valve includes the maximum opening degree of the electronic expansion valve and / or the minimum opening degree of the electronic expansion valve; when the actual exhaust gas temperature is higher than the target maximum exhaust gas temperature, the processor 910 increases the opening degree of the electronic expansion valve at a target valve opening rate according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve, and is specifically configured to perform: when the actual exhaust gas temperature is higher than the target maximum exhaust gas temperature, predict the opening degree of the adjusted electronic expansion valve according to the target valve opening rate; the target valve opening rate is determined according to the actual exhaust gas temperature, and the actual exhaust gas temperature changes with the change of the opening degree of the electronic expansion valve; when it is predicted that the opening degree of the adjusted electronic expansion valve is less than or equal to the maximum opening degree of the electronic expansion valve, increase the opening degree of the electronic expansion valve at the target valve opening rate; when it is predicted that the opening degree of the adjusted electronic expansion valve is greater than the maximum opening degree of the electronic expansion valve, adjust the opening degree of the electronic expansion valve to the maximum opening degree of the electronic expansion valve;

[0183] When the actual exhaust gas temperature is lower than the target minimum exhaust gas temperature, the processor 910 reduces the opening degree of the electronic expansion valve at a target valve closing rate according to the actual exhaust gas temperature and the opening degree range of the electronic expansion valve, and is specifically configured to perform: when the actual exhaust gas temperature is lower than the target minimum exhaust gas temperature, predict the opening degree of the adjusted electronic expansion valve according to the target valve closing rate; the target valve closing rate is determined according to the actual exhaust gas temperature, and the actual exhaust gas temperature changes with the change of the opening degree of the electronic expansion valve; when it is predicted that the opening degree of the adjusted electronic expansion valve is greater than or equal to the minimum opening degree of the electronic expansion valve, reduce the opening degree of the electronic expansion valve at the target valve closing rate; when it is predicted that the opening degree of the adjusted electronic expansion valve is less than the minimum opening degree of the electronic expansion valve, adjust the opening degree of the electronic expansion valve to the minimum opening degree of the electronic expansion valve.

[0184] In some possible embodiments, after the above-mentioned processor 910 executes the above-mentioned operation of obtaining the current operating parameters of the heat pump system, it is further configured to execute: determining whether the above-mentioned current operating parameters meet a preset condition; when the above-mentioned current operating parameters do not meet the above-mentioned preset condition, controlling the opening degree of the above-mentioned electronic expansion valve to remain unchanged; when the above-mentioned current operating parameters meet the above-mentioned preset condition, executing the above-mentioned step of determining the opening degree range of the electronic expansion valve according to the above-mentioned current ambient temperature and the above-mentioned current water temperature.

[0185] An embodiment of the present application further provides a computer storage medium. Instructions are stored in the computer storage medium. When the instructions are run on a computer or a processor, the computer or the processor is caused to execute one or more steps in any of the above-mentioned methods. If each component module of the above-mentioned data query device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in the above-mentioned storage medium.

[0186] In the above-mentioned embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The above-mentioned computer program product includes one or more computer instructions. When the above-mentioned computer program instructions are loaded and executed on a computer, the processes or functions according to the above-mentioned embodiments of the present application are generated in whole or in part. The above-mentioned computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The above-mentioned computer instructions can be stored in a computer-readable storage medium or transmitted through the above-mentioned computer-readable storage medium. The above-mentioned computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The above-mentioned computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The above-mentioned available media can be magnetic media (such as floppy disks, hard disks, magnetic tapes), optical media (such as DVDs), or semiconductor media (such as solid state disks (SSDs)), etc.

[0187] Those of ordinary skill in the art can understand that all or part of the processes of implementing the methods in the above-mentioned embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The foregoing storage media include: ROM, RAM, magnetic disks, or optical discs and other media that can store program codes. Without conflict, the technical features in this embodiment and the implementation solutions can be combined arbitrarily.

[0188] The above-mentioned embodiments are only descriptions of the preferred embodiments of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. An electronic expansion valve control method, characterized in that: include: Obtaining current operating parameters of the heat pump system; the current operating parameters include actual exhaust temperature, current ambient temperature, current water temperature, and target exhaust temperature range; determining an opening range of the electronic expansion valve according to the current ambient temperature and the current water temperature; The opening of the electronic expansion valve is adjusted according to the actual exhaust temperature, the target exhaust temperature range, and the opening range of the electronic expansion valve.

2. The method according to claim 1, characterized in that The current operating parameters also include a temperature difference at the injection port; the method further includes: When the actual exhaust temperature meets the target exhaust temperature range, adjusting the opening of the electronic expansion valve according to the injection port temperature difference; The adjusting the opening of the electronic expansion valve according to the actual exhaust temperature, the target exhaust temperature range and the opening range of the electronic expansion valve comprises: When the actual exhaust temperature does not meet the target exhaust temperature range, the opening of the electronic expansion valve is adjusted according to the actual exhaust temperature and the opening range of the electronic expansion valve.

3. The method according to claim 2, characterized in that The step of adjusting the opening of the electronic expansion valve according to the injection port temperature difference comprises: When the injection port temperature difference is greater than the injection port temperature difference threshold, increasing the opening of the electronic expansion valve; When the injection port temperature difference is less than or equal to the injection port temperature difference threshold, the opening of the electronic expansion valve is adjusted, or the opening of the electronic expansion valve is controlled to remain unchanged.

4. The method according to claim 2, characterized in that The target exhaust temperature range includes a target maximum exhaust temperature and / or a target minimum exhaust temperature; When the actual exhaust temperature does not meet the target exhaust temperature range, adjusting the opening of the electronic expansion valve according to the actual exhaust temperature and the opening range of the electronic expansion valve includes: When the actual exhaust temperature is greater than the target maximum exhaust temperature, increasing the opening of the electronic expansion valve according to the actual exhaust temperature and the opening range of the electronic expansion valve; When the actual exhaust temperature is lower than the target minimum exhaust temperature, the opening of the electronic expansion valve is reduced according to the actual exhaust temperature and the opening range of the electronic expansion valve.

5. The method according to claim 4, characterized in that When the actual exhaust temperature is greater than the target maximum exhaust temperature, increasing the opening of the electronic expansion valve according to the actual exhaust temperature and the opening range of the electronic expansion valve includes: When the actual exhaust temperature is greater than the target maximum exhaust temperature, increasing the opening of the electronic expansion valve at a target valve opening rate according to the actual exhaust temperature and the opening range of the electronic expansion valve; When the actual exhaust temperature is lower than the target minimum exhaust temperature, reducing the opening of the electronic expansion valve according to the actual exhaust temperature and the opening range of the electronic expansion valve includes: When the actual exhaust temperature is lower than the target minimum exhaust temperature, the opening of the electronic expansion valve is reduced at a target valve closing rate according to the actual exhaust temperature and the opening range of the electronic expansion valve.

6. The method according to claim 5, characterized in that When the actual exhaust temperature is lower than the first exhaust temperature, the target valve opening rate is the first valve opening rate; when the actual exhaust temperature is higher than or equal to the first exhaust temperature, the target valve opening rate is the second valve opening rate; and the first exhaust temperature is higher than the target maximum exhaust temperature; The second valve opening rate is greater than the first valve opening rate; When the actual exhaust temperature is lower than the second exhaust temperature, the target valve closing rate is the first valve closing rate; when the actual exhaust temperature is greater than or equal to the second exhaust temperature, the target valve closing rate is the second valve closing rate; the second exhaust temperature is lower than the target minimum exhaust temperature; the second valve closing rate is lower than the first valve closing rate.

7. The method according to claim 5, characterized in that The opening range of the electronic expansion valve includes the maximum opening of the electronic expansion valve and / or the minimum opening of the electronic expansion valve; When the actual exhaust temperature is greater than the target maximum exhaust temperature, increasing the opening of the electronic expansion valve at a target valve opening rate according to the actual exhaust temperature and the opening range of the electronic expansion valve, comprises: When the actual exhaust temperature is greater than the target maximum exhaust temperature, the opening of the electronic expansion valve is increased at a target valve opening rate according to the actual exhaust temperature; when the adjusted opening of the electronic expansion valve is greater than the maximum opening of the electronic expansion valve, the adjusted opening of the electronic expansion valve is adjusted to the maximum opening of the electronic expansion valve; When the actual exhaust temperature is less than the target minimum exhaust temperature, reducing the opening of the electronic expansion valve at a target valve closing rate according to the actual exhaust temperature and the opening range of the electronic expansion valve, comprises: When the actual exhaust temperature is lower than the target minimum exhaust temperature, the opening of the electronic expansion valve is reduced at a target valve closing rate according to the actual exhaust temperature; when the adjusted opening of the electronic expansion valve is lower than the minimum opening of the electronic expansion valve, the adjusted opening of the electronic expansion valve is adjusted to the minimum opening of the electronic expansion valve.

8. The method according to claim 5, characterized in that The opening range of the electronic expansion valve includes the maximum opening of the electronic expansion valve and / or the minimum opening of the electronic expansion valve; When the actual exhaust temperature is greater than the target maximum exhaust temperature, increasing the opening of the electronic expansion valve at a target valve opening rate according to the actual exhaust temperature and the opening range of the electronic expansion valve, comprises: When the actual exhaust temperature is greater than the target maximum exhaust temperature, the opening of the electronic expansion valve after adjustment is predicted according to the target valve opening rate; the target valve opening rate is determined according to the actual exhaust temperature, and the actual exhaust temperature changes with the opening of the electronic expansion valve; When it is predicted that the opening of the electronic expansion valve after adjustment is less than or equal to the maximum opening of the electronic expansion valve, increasing the opening of the electronic expansion valve at the target valve opening rate; When it is predicted that the opening of the electronic expansion valve after adjustment is greater than the maximum opening of the electronic expansion valve, adjusting the opening of the electronic expansion valve to the maximum opening of the electronic expansion valve; When the actual exhaust temperature is less than the target minimum exhaust temperature, reducing the opening of the electronic expansion valve at a target valve closing rate according to the actual exhaust temperature and the opening range of the electronic expansion valve, comprises: When the actual exhaust temperature is less than the target minimum exhaust temperature, the opening of the electronic expansion valve after adjustment is predicted according to the target valve closing rate; the target valve closing rate is determined according to the actual exhaust temperature, and the actual exhaust temperature changes with the opening of the electronic expansion valve; When it is predicted that the opening of the electronic expansion valve after adjustment is greater than or equal to the minimum opening of the electronic expansion valve, reducing the opening of the electronic expansion valve at the target valve closing rate; When it is predicted that the adjusted opening of the electronic expansion valve is less than the minimum opening of the electronic expansion valve, the opening of the electronic expansion valve is adjusted to the minimum opening of the electronic expansion valve.

9. The method according to claim 1, characterized in that After obtaining the current operating parameters of the heat pump system, the method further includes: Determining whether the current operating parameters meet preset conditions; When the current operating parameters do not meet the preset conditions, controlling the opening of the electronic expansion valve to remain unchanged; In the case where the current operating parameters meet the preset conditions, the step of determining the opening range of the electronic expansion valve according to the current ambient temperature and the current water temperature is performed.

10. An electronic expansion valve control device, characterized in that: include: An acquisition module is used to acquire current operating parameters of the heat pump system; the current operating parameters include actual exhaust temperature, current ambient temperature, current water temperature, and target exhaust temperature range; A determination module, used to determine the opening range of the electronic expansion valve according to the current ambient temperature and the current water temperature; The regulating module is used to regulate the opening of the electronic expansion valve according to the actual exhaust temperature, the target exhaust temperature range and the opening range of the electronic expansion valve.

11. A heat pump system, characterized in that: include: An electronic expansion valve and a controller; wherein the electronic expansion valve is used to control the refrigerant flow in the heat pump system to achieve control of the actual exhaust temperature within a target exhaust temperature range, and the controller is used to execute the method described in any one of claims 1 to 9 to achieve control of the electronic expansion valve.

12. An electronic device, characterized in that: include: A processor and a memory; wherein the memory stores an executable program code, and the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to execute the method according to any one of claims 1 to 9.

13. A computer storage medium, characterized in that: The computer storage medium stores a plurality of instructions, which are suitable for being loaded by a processor and executing the method steps according to any one of claims 1 to 9.

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