Electronic valve control method, device and related equipment

Abstract

The present application relates to a kind of electronic valve control method, device and related equipment, it is related to electronic valve control technical field, the method, device and related equipment, by the indoor outdoor environment parameter of target temperature control system, determine the corresponding reference pressure value, to calculate the deviation of reference pressure value and current pressure value, as pressure value deviation, according to the size relationship of pressure value deviation and preset deviation threshold to determine target control mode, to change the electronic expansion valve opening degree according to the electronic expansion valve opening degree parameter set in target control mode control electronic expansion valve opening degree.It can be understood that, by using the present technical solution, the actual operating pressure value of indoor unit, outdoor unit and preset pressure value can be compared, to analyze the installation relative position of indoor unit and outdoor unit, to select control mode, adjust electronic expansion valve opening degree, improve the actual use effect of refrigeration, heating, to improve the refrigeration, heating comfort experience of user.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic valve control, in particular to an electronic valve control method and device and related equipment. BACKGROUND

[0002] When a heating system or a refrigeration system is installed and used, it needs to be installed differently according to different installation areas. For example, taking an air conditioner as an example, when the air conditioner is installed and used, due to the difference in user room structure, the installation position of the outdoor unit of the air conditioner is not the same, which can be near the same horizontal plane as the indoor unit, or can be installed higher or lower than the indoor unit, so that the installation and use process of the air conditioner is different from the design process, affecting the refrigeration and heating effect.

[0003] Therefore, how to ensure the refrigeration and heating effect in actual use of users when the installation height of the outdoor unit is not at the same horizontal plane as the indoor unit has become a technical problem to be solved in the prior art. SUMMARY

[0004] Therefore, the purpose of the present application is to provide an electronic valve control method, device and related equipment to overcome the problem of affecting the refrigeration and heating effect when the installation height of the outdoor unit is not at the same horizontal plane as the indoor unit.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] On the one hand, a control method of an electronic expansion valve, characterized in that it comprises:

[0007] Obtaining indoor and outdoor environmental parameters of a target temperature control system, and obtaining a reference pressure value corresponding to the indoor and outdoor environmental parameters in a preset environmental parameter and pressure value corresponding relationship library;

[0008] Determining a current pressure value and calculating the deviation between the reference pressure value and the current pressure value as a pressure value deviation;

[0009] According to the size relationship between the pressure value deviation and a preset deviation threshold, determining a target control mode in a preset control mode, and controlling the change of the opening degree of the electronic expansion valve according to the target control mode; wherein each preset control mode sets different electronic expansion valve opening degree parameters.

[0010] Optionally, the obtaining of the indoor and outdoor environmental parameters of the target temperature control system comprises:

[0011] In response to a control optimization mode trigger instruction, entering the control optimization mode; in the control optimization mode, obtaining the indoor and outdoor environmental parameters of the target temperature control system.

[0012] Optionally, the target control mode is determined in the preset control mode according to the size relationship between the pressure value deviation and the preset deviation threshold, and the electronic expansion valve opening degree is controlled according to the target control mode, including:

[0013] When the pressure value deviation is greater than or equal to the first preset deviation threshold, and the pressure value deviation is less than or equal to the second preset deviation threshold, a first control mode is determined as the target control mode in the preset control mode, and the electronic expansion valve opening degree is controlled according to the first control mode; wherein the first control mode is to control the electronic expansion valve opening degree according to the reference electronic expansion valve opening degree parameter.

[0014] Optionally, the target control mode is determined in the preset control mode according to the size relationship between the pressure value deviation and the preset deviation threshold, and the electronic expansion valve opening degree is controlled according to the target control mode, including:

[0015] When the pressure value deviation is less than the first preset deviation threshold, it is judged whether the current operation mode of the target temperature control system is heating operation, and if the current operation mode of the target temperature control system is heating operation, a second control mode is determined as the target control mode in the preset control mode, and the electronic expansion valve opening degree is controlled according to the second control mode;

[0016] Wherein, the second control mode is to control the electronic expansion valve opening degree according to the size relationship between the frequency and the preset frequency threshold.

[0017] Optionally, the electronic expansion valve opening degree is controlled according to the size relationship between the frequency and the preset frequency threshold, including:

[0018] In the heating operation mode, if the current frequency is less than the first preset frequency threshold, the electronic expansion valve opening degree is controlled to decrease by a first threshold value, and the system runs for a preset time length;

[0019] If the current frequency is greater than or equal to the first preset frequency threshold, and less than or equal to the second preset frequency threshold, the electronic expansion valve opening degree is controlled to decrease by a second threshold value, and the system runs for a preset time length;

[0020] If the current frequency is greater than the second preset frequency threshold, the electronic expansion valve opening degree is controlled to decrease by a third threshold value, and the system runs for a preset time length;

[0021] Wherein, the first preset frequency threshold is less than the second preset frequency threshold; the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value.

[0022] Optionally, the target control mode is determined in the preset control mode according to the size relationship between the pressure value deviation and the preset deviation threshold, and the electronic expansion valve opening degree is controlled according to the target control mode, including:

[0023] determining whether the current operation mode of the target temperature control system is a heating operation mode, and if the current operation mode of the target temperature control system is not the heating operation mode, determining a second control mode as a target control mode in the preset control mode, and controlling the opening degree of the electronic expansion valve according to the second control mode.

[0024] The second control mode is to control the opening degree of the electronic expansion valve according to a size relationship between the frequency and a preset frequency threshold.

[0025] Optionally, the controlling of the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold comprises:

[0026] In the non-heating operation mode, if the current frequency is less than a first preset frequency threshold, the opening degree of the electronic expansion valve is increased by a first threshold value, and the system is operated for a preset time length.

[0027] If the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to a second preset frequency threshold, the opening degree of the electronic expansion valve is increased by a second threshold value, and the system is operated for a preset time length.

[0028] If the current frequency is greater than the second preset frequency threshold, the opening degree of the electronic expansion valve is increased by a third threshold value, and the system is operated for a preset time length.

[0029] The first preset frequency threshold is less than the second preset frequency threshold, the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value.

[0030] Optionally, the determining of the target control mode in the preset control mode according to the size relationship between the pressure value deviation and the preset deviation threshold and the controlling of the opening degree of the electronic expansion valve according to the target control mode comprise:

[0031] determining whether the current operation mode of the target temperature control system is a heating operation mode, and if the current operation mode of the target temperature control system is the heating operation mode, determining a third control mode as a target control mode in the preset control mode, and controlling the opening degree of the electronic expansion valve according to the third control mode.

[0032] The third control mode is to control the opening degree of the electronic expansion valve according to a size relationship between the frequency and a preset frequency threshold.

[0033] Optionally, the controlling of the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold comprises:

[0034] In the heating operation mode, if the current frequency is less than a first preset frequency threshold, the electronic expansion valve opening degree is controlled to increase by a first threshold value, and the system runs for a preset time length;

[0035] If the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to a second preset frequency threshold, the electronic expansion valve opening degree is controlled to increase by a second threshold value, and the system runs for a preset time length;

[0036] If the current frequency is greater than the second preset frequency threshold, the electronic expansion valve opening degree is controlled to increase by a third threshold value, and the system runs for a preset time length;

[0037] The first preset frequency threshold is less than the second preset frequency threshold; the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value.

[0038] Optionally, the target control mode is determined in the preset control mode according to the size relationship between the pressure value deviation and the preset deviation threshold, and the electronic expansion valve opening degree is controlled according to the target control mode, including:

[0039] When the pressure value deviation is less than a first preset deviation threshold, it is judged whether the current operation mode of the target temperature control system is a heating operation. If the current operation mode of the target temperature control system is a non-heating operation, a third control mode is determined as the target control mode in the preset control mode, and the opening degree of the electronic expansion valve is controlled according to the third control mode.

[0040] The third control mode is to control the electronic expansion valve opening degree according to the size relationship between the frequency and the preset frequency threshold.

[0041] Optionally, the electronic expansion valve opening degree is controlled according to the size relationship between the frequency and the preset frequency threshold, including:

[0042] In the non-heating operation mode, if the current frequency is less than a first preset frequency threshold, the electronic expansion valve opening degree is controlled to decrease by a first threshold value, and the system runs for a preset time length;

[0043] If the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to a second preset frequency threshold, the electronic expansion valve opening degree is controlled to decrease by a second threshold value, and the system runs for a preset time length;

[0044] If the current frequency is greater than the second preset frequency threshold, the electronic expansion valve opening degree is controlled to decrease by a third threshold value, and the system runs for a preset time length;

[0045] The first preset frequency threshold is less than the second preset frequency threshold; the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value.

[0046] In another aspect, a control device of an electronic expansion valve comprises:

[0047] The acquisition module is configured to acquire indoor and outdoor environment parameters of a target temperature control system, and acquire a reference pressure value corresponding to the indoor and outdoor environment parameters in a preset environment parameter and pressure value corresponding relationship library.

[0048] The calculation module is configured to determine a current pressure value, and calculate a deviation between the reference pressure value and the current pressure value as a pressure value deviation.

[0049] The control module is configured to determine a target control mode in preset control modes according to a size relationship between the pressure value deviation and a preset deviation threshold, and control a change in the electronic expansion valve opening degree according to the target control mode, wherein different electronic expansion valve opening degree parameters are set for each preset control mode.

[0050] In another aspect, a control device of an electronic expansion valve includes a processor and a memory, the processor being connected to the memory.

[0051] The processor is configured to call and execute a program stored in the memory.

[0052] The memory is configured to store the program, and the program is used to execute at least the control method of the electronic expansion valve.

[0053] In another aspect, an air conditioner includes the control device of the electronic expansion valve.

[0054] The technical solution provided by the present application has at least the following advantages:

[0055] The reference pressure value corresponding to the indoor and outdoor environment parameters of the target temperature control system is determined, and the deviation between the reference pressure value and the current pressure value is calculated as the pressure value deviation, and the target control mode is determined according to the size relationship between the pressure value deviation and the preset deviation threshold, so that the electronic expansion valve opening degree is controlled according to the electronic expansion valve opening degree parameter set in the target control mode. It can be understood that by using the technical solution, the actual operating pressure value of the indoor unit and the preset pressure value can be compared to analyze the relative position of the indoor unit and the outdoor unit, so as to select the control mode and adjust the electronic expansion valve opening degree, thereby improving the actual use effect of refrigeration and heating, and improving the user's refrigeration and heating comfort experience. BRIEF DESCRIPTION OF DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0057] Figure 1 is a control method flowchart of an electronic expansion valve provided by an embodiment of the present application;

[0058] Figure 2 is a structural schematic diagram of a control device of an electronic expansion valve provided by an embodiment of the present application;

[0059] Figure 3 is a structural schematic diagram of a control device of an electronic expansion valve provided by an embodiment of the present application. DETAILED DESCRIPTION

[0060] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments only represent some 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 labor fall within the scope of the present application.

[0061] As described in the background, when a heating system or a refrigeration system is installed and used, it needs to be installed differently according to different installation areas. For example, taking an air conditioner as an example, when the air conditioner is installed and used, due to the difference in user room structure, the installation position of the outdoor unit of the air conditioner is not the same, which can be near the same horizontal plane as the indoor unit, or can be installed at a position higher or lower than the indoor unit, so that there is a difference between the installation and use process and the design process of the air conditioner, which affects the refrigeration and heating effect.

[0062] Therefore, how to ensure the refrigeration and heating effect in actual use of users when the installation height of the outdoor unit is not at the same horizontal plane as the indoor unit has become a technical problem to be solved in the prior art.

[0063] Based on this, the embodiments of the present application provide an electronic valve control method, device and related equipment to ensure the refrigeration and heating effect in actual use of users.

[0064] Figure 1 is a control method flowchart of an electronic expansion valve provided by an embodiment of the present application, which is referred to Figure 1 The present embodiment can include the following steps:

[0065] Step S11, obtaining indoor and outdoor environment parameters of the target temperature control system, and obtaining a reference pressure value corresponding to the indoor and outdoor environment parameters in a preset environment parameter and pressure value corresponding relationship library;

[0066] Step S12, determining a current pressure value, and calculating a deviation between the reference pressure value and the current pressure value as a pressure value deviation;

[0067] Step S13, determining a target control mode in the preset control mode according to a size relationship between the pressure value deviation and a preset deviation threshold, and controlling the electronic expansion valve opening degree change according to the target control mode; wherein different electronic expansion valve opening degree parameters are set for each preset control mode.

[0068] Since the refrigerant changes between gas and liquid phases during heat exchange and circulation in the air conditioning system, the relative height of the indoor unit and the outdoor unit of the air conditioner will affect the evaporation pressure, the condensation pressure, the system flow rate, etc. during the refrigerant circulation, thereby affecting the performance and reliability of the air conditioning system.

[0069] In a specific implementation process, the target temperature control system can be defined as an air conditioner or other refrigeration equipment, heating equipment, etc. Taking the air conditioner as an example, the control method of the electronic expansion valve of the present application is described, wherein the electronic expansion valve can be an electronic expansion valve in the air conditioner, for example, it can be an electronic expansion valve of an MT cabinet air conditioner. Wherein the electronic expansion valve is described, the general circulation process of the refrigeration system is compressor→condenser→throttling device (here the throttling device is an electronic expansion valve)→evaporator→compressor.

[0070] The indoor and outdoor environment parameters of the target temperature control system can be temperature and humidity, and a temperature and humidity and pressure value corresponding relationship library is constructed in advance, wherein the pressure value in the relationship library is a reference pressure value corresponding to the temperature and humidity, that is, the reference pressure value corresponding to the temperature and humidity under stable operation when the indoor unit and the outdoor unit of the air conditioner are installed on the same horizontal plane is tested.

[0071] After obtaining the current indoor and outdoor environment parameters of the air conditioner, the corresponding reference pressure value α is determined in the relationship library, the current pressure value β is obtained, and the deviation between the two is calculated as the pressure value deviation γ=(α-β) / α; and the size relationship between γ and the preset deviation threshold is determined, thereby determining the target control mode.

[0072] Specifically, different control modes can be set in advance according to the relative position of the indoor unit and the outdoor unit, and different electronic expansion valve opening degree parameters are set for each different preset control mode.

[0073] It can be understood that the corresponding reference pressure value is determined through the indoor and outdoor environment parameters of the target temperature control system, so as to calculate the deviation of the reference pressure value and the current pressure value as the pressure value deviation, and the target control mode is determined according to the size relationship between the pressure value deviation and the preset deviation threshold, so as to control the electronic expansion valve opening degree change according to the electronic expansion valve opening degree parameter set in the target control mode. It can be understood that by using the technical solution, the actual operating pressure value of the indoor unit and the preset pressure value can be compared, so as to analyze the relative position of the indoor unit and the outdoor unit during installation, and the control mode is selected, and the electronic expansion valve opening degree is adjusted, thereby improving the actual use effect of refrigeration and heating, and improving the refrigeration and heating comfort experience of the user.

[0074] In some embodiments, the indoor and outdoor environment parameters of the target temperature control system are obtained, including:

[0075] In response to the control optimization mode trigger instruction, the control optimization mode is entered; in the control optimization mode, the indoor and outdoor environment parameters of the target temperature control system are obtained.

[0076] The control optimization mode trigger instruction can be a power-on instruction or a specific instruction input by the user.

[0077] It can be understood that by setting the control optimization mode trigger instruction, the air conditioner can enter the control optimization module, and the indoor and outdoor environment parameters of the target temperature control system are obtained in this mode, and the control method of the electronic expansion valve provided in the embodiment is executed, which is convenient for the user to select the mode.

[0078] In some embodiments, according to the size relationship between the pressure value deviation and the preset deviation threshold, the target control mode is determined in the preset control mode, and the electronic expansion valve opening degree change is controlled according to the target control mode, including:

[0079] When the pressure value deviation is greater than or equal to the first preset deviation threshold, and the pressure value deviation is less than or equal to the second preset deviation threshold, the first control mode is determined as the target control mode in the preset control mode, and the opening degree of the electronic expansion valve is controlled according to the first control mode; wherein the first control mode is the electronic expansion valve opening degree control according to the reference electronic expansion valve opening degree parameter.

[0080] The preset deviation threshold can include the first preset deviation threshold and the second preset deviation threshold, and the first preset deviation threshold is less than the second preset deviation threshold. For example, the first preset deviation threshold can be -5%, and the second preset deviation threshold can be 5%. It is worth noting that the specific values in the embodiment are only examples and are not limited.

[0081] When it is judged that the pressure value deviation is -5%≤γ≤5%, a first control mode is determined to control the opening degree of the electronic expansion valve. The first control mode can be that, in the heating and non-heating modes, the electronic expansion valve opening degree parameter is based on the test results when the indoor unit and the outdoor unit are placed on the same horizontal plane.

[0082] It can be understood that, by setting the first control mode, the control of the electronic expansion valve when the indoor unit and the outdoor unit are placed on the same horizontal plane is realized.

[0083] In some embodiments, according to the size relationship between the pressure value deviation and the preset deviation threshold, a target control mode is determined in a preset control mode, and the electronic expansion valve opening degree is controlled according to the target control mode, including:

[0084] When the pressure value deviation is less than a first preset deviation threshold, it is judged whether the current operating mode of the target temperature control system is a heating operation. If the current operating mode of the target temperature control system is a heating operation, a second control mode is determined as the target control mode in the preset control mode, and the opening degree of the electronic expansion valve is controlled according to the second control mode.

[0085] The second control mode is to control the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold.

[0086] In some embodiments, according to the size relationship between the pressure value deviation and the preset deviation threshold, a target control mode is determined in a preset control mode, and the electronic expansion valve opening degree is controlled according to the target control mode, including:

[0087] When the pressure value deviation is greater than a second preset deviation threshold, it is judged whether the current operating mode of the target temperature control system is a heating operation. If the current operating mode of the target temperature control system is a non-heating operation, a second control mode is determined as the target control mode in the preset control mode, and the opening degree of the electronic expansion valve is controlled according to the second control mode.

[0088] The second control mode is to control the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold.

[0089] For example, when it is judged that the pressure value deviation γ<-5%, it is judged whether the current operating mode of the current temperature control system is a heating mode. In the heating mode, a second control mode is determined to control the opening degree of the electronic expansion valve. In the non-heating mode, a third control mode is determined to control the opening degree of the electronic expansion valve.

[0090] It can be understood that the second control mode and the third control mode can be set to be selected in the heating mode and the non-heating mode, so as to improve the operation accuracy.

[0091] In some embodiments, in the second control mode, the opening degree of the electronic expansion valve is controlled according to the size relationship between the frequency and the preset frequency threshold, including:

[0092] In the heating operation mode, if the current frequency is less than the first preset frequency threshold, the opening degree of the electronic expansion valve is controlled to decrease by the first threshold value, and the system runs for a preset time length;

[0093] If the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to decrease by the second threshold value, and the system runs for a preset time length;

[0094] If the current frequency is greater than the second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to decrease by the third threshold value, and the system runs for a preset time length;

[0095] The first preset frequency threshold is less than the second preset frequency threshold; the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value.

[0096] For example, in the second control mode, if the current frequency A is less than the first preset frequency threshold (for example, 40 Hz) when the current operation mode is the heating operation mode, the opening degree of the electronic expansion valve is controlled to decrease by the first threshold value (for example, 3P), and the system runs for a preset time length (for example, 300 s); if the first preset frequency threshold (for example, 40 Hz) is less than or equal to the current frequency A and less than or equal to the second preset frequency threshold (for example, 80 Hz), the opening degree of the electronic expansion valve is controlled to decrease by the second threshold value (for example, 2P), and the system runs for a preset time length (for example, 300 s); if the current frequency A is greater than the second preset frequency threshold (for example, 80 Hz), the opening degree of the electronic expansion valve is controlled to decrease by the third threshold value (for example, 1P), and the system runs for a preset time length (for example, 300 s). It should be noted that the numerical values in the embodiments of the present application are all enumerated and are not limited. Then the value of γ is detected and calculated again until γ≥-5%, and the current operation parameters are maintained.

[0097] In some embodiments, in the second control mode, the opening degree of the electronic expansion valve is controlled according to the size relationship between the frequency and the preset frequency threshold, including:

[0098] In the non-heating operation mode, if the current frequency is less than the first preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by the first threshold value, and the system runs for a preset time length;

[0099] If the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by the second threshold value, and the system runs for a preset time length;

[0100] If the current frequency is greater than the second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by the third threshold value, and the system runs for a preset time length;

[0101] The first preset frequency threshold is less than the second preset frequency threshold; the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold.

[0102] For example, the second control mode can be: when the current operating mode is a non-heating operating mode, if the current frequency A < the first preset frequency threshold (for example, 40 Hz), the electronic expansion valve opening degree is controlled to increase by the first threshold (for example, 3P) for a preset time length (for example, 300 s); if the first preset frequency threshold (for example, 40 Hz) ≤ the current frequency A ≤ the second preset frequency threshold (for example, 80 Hz), the electronic expansion valve opening degree is controlled to increase by the second threshold (for example, 2P) for a preset time length (for example, 300 s); and if the current frequency A > the second preset frequency threshold (for example, 80 Hz), the electronic expansion valve opening degree is controlled to increase by the third threshold (for example, 1P) for a preset time length (for example, 300 s). It should be noted that the numerical values in the embodiments of the present application are all enumerated and are not limited. The value of γ is detected and calculated again until γ ≤ 5%, and the current operating parameters are maintained.

[0103] In some embodiments, according to the size relationship between the pressure value deviation and the preset deviation threshold, a target control mode is determined in a preset control mode, and the electronic expansion valve opening degree is controlled according to the target control mode, including:

[0104] When the pressure value deviation is greater than the second preset deviation threshold, it is judged whether the current operating mode of the target temperature control system is heating operation, and if the current operating mode of the target temperature control system is heating operation, a third control mode is determined as the target control mode in the preset control mode, and the opening degree of the electronic expansion valve is controlled according to the third control mode.

[0105] The third control mode is to control the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold.

[0106] In some embodiments, according to the size relationship between the pressure value deviation and the preset deviation threshold, a target control mode is determined in a preset control mode, and the electronic expansion valve opening degree is controlled according to the target control mode, including:

[0107] When the pressure value deviation is less than the first preset deviation threshold, it is judged whether the current operating mode of the target temperature control system is heating operation, and if the current operating mode of the target temperature control system is non-heating operation, a third control mode is determined as the target control mode in the preset control mode, and the opening degree of the electronic expansion valve is controlled according to the third control mode.

[0108] The third control mode is to control the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold.

[0109] When it is judged that the pressure value deviation γ > 5%, it is judged whether the current operation mode is heating, if the current operation mode is heating, the third control mode is determined to control the opening degree of the electronic expansion valve; if the current operation mode is non-heating operation, the second control mode is determined to control the opening degree of the electronic expansion valve.

[0110] When it is judged that the pressure value deviation γ < -5%, it is judged whether the current operation mode is heating, if the current operation mode is heating, the second control mode is determined to control the opening degree of the electronic expansion valve; if the current operation mode is non-heating operation, the third control mode is determined to control the opening degree of the electronic expansion valve.

[0111] In some embodiments, in the third control mode, the opening degree of the electronic expansion valve is controlled according to the size relationship between the frequency and the preset frequency threshold, including:

[0112] In the heating operation mode, if the current frequency is less than the first preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by the first threshold value, and the system runs for a preset time length;

[0113] If the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by the second threshold value, and the system runs for a preset time length;

[0114] If the current frequency is greater than the second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by the third threshold value, and the system runs for a preset time length;

[0115] Wherein, the first preset frequency threshold is less than the second preset frequency threshold; the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value.

[0116] For example, the third control mode can be: when the current operation mode is the heating operation mode, if the current frequency A < the first preset frequency threshold (for example, 40Hz), the opening degree of the electronic expansion valve is controlled to increase by the first threshold value (for example, 3P), and the system runs for a preset time length (for example, 300s); if the first preset frequency threshold (for example, 40Hz) ≤ the current frequency A ≤ the second preset frequency threshold (for example, 80Hz), the opening degree of the electronic expansion valve is controlled to increase by the second threshold value (for example, 2P), and the system runs for a preset time length (for example, 300s); if the current frequency A > the second preset frequency threshold (for example, 80Hz), the opening degree of the electronic expansion valve is controlled to increase by the third threshold value (for example, 1P), and the system runs for a preset time length (for example, 300s). It should be noted that the values in the embodiments of the present application are all enumerated and are not limited.

[0117] In some embodiments, in the third control mode, the opening degree of the electronic expansion valve is controlled according to the size relationship between the frequency and the preset frequency threshold, including:

[0118] In the non-heating operation mode, if the current frequency is less than the first preset frequency threshold, the electronic expansion valve opening degree is controlled to decrease by the first threshold value, and the operation is performed for a preset time length;

[0119] If the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to the second preset frequency threshold, the electronic expansion valve opening degree is controlled to decrease by the second threshold value, and the operation is performed for a preset time length;

[0120] If the current frequency is greater than the second preset frequency threshold, the electronic expansion valve opening degree is controlled to decrease by the third threshold value, and the operation is performed for a preset time length.

[0121] The first preset frequency threshold is less than the second preset frequency threshold; the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value.

[0122] For example, the third control mode can be: in the current operation mode is the non-heating operation mode, if the current frequency A < the first preset frequency threshold (for example, 40 Hz), the electronic expansion valve opening degree is controlled to decrease by the first threshold value (for example, 3P), and the operation is performed for a preset time length (for example, 300s); if the first preset frequency threshold (for example, 40 Hz) ≤ the current frequency A ≤ the second preset frequency threshold (for example, 80 Hz), the electronic expansion valve opening degree is controlled to decrease by the second threshold value (for example, 2P), and the operation is performed for a preset time length (for example, 300s); if the current frequency A > the second preset frequency threshold (for example, 80 Hz), the electronic expansion valve opening degree is controlled to decrease by the third threshold value (for example, 1P), and the operation is performed for a preset time length (for example, 300s). It should be noted that the values in the embodiments of the present application are all enumerated and are not limited.

[0123] It can be understood that the different control modes respectively arranged in the first control mode, the second control mode and the third control mode realize the consideration of different indoor units and outdoor unit installation positions.

[0124] In the second control mode, when the outdoor unit is installed lower than the indoor unit: In cooling mode, the resistance increases when the liquid refrigerant enters the indoor unit from the outdoor unit, reducing the system circulation flow and affecting cooling performance. Simultaneously, the system condensing pressure also increases, which may affect system reliability. Appropriately increasing the opening of the electronic expansion valve can improve system circulation flow and reduce system resistance, thus helping to ensure both cooling performance and system reliability. In heating mode, the resistance decreases when the liquid refrigerant enters the outdoor unit from the indoor unit, increasing system circulation flow and reducing evaporative superheat. In severe cases, incomplete evaporation or even liquid slugging may occur, damaging the compressor and affecting system reliability. Simultaneously, the condensing pressure decreases, and the condensing temperature also decreases, reducing the condensing heat exchange temperature and affecting indoor heating capacity. Appropriately reducing the opening of the electronic expansion valve can reduce system circulation flow and regulate condensing pressure and evaporative superheat, helping to ensure both heating performance and system reliability.

[0125] When the outdoor unit is installed higher than the indoor unit (third control mode), the situation is the opposite of the above. In cooling mode, the increased system circulation flow, decreased evaporative superheat, and reduced condensing pressure lead to a poorer cooling effect. The system state can be adjusted by appropriately reducing the opening of the electronic expansion valve to ensure cooling performance. In heating mode, the reduced system circulation flow directly affects the heating effect. The system state can be adjusted by appropriately increasing the opening of the electronic expansion valve to ensure heating performance.

[0126] Based on a general inventive concept, embodiments of the present invention also provide a control device for an electronic expansion valve, used to implement the above-described method embodiments.

[0127] Figure 2 This is a schematic diagram of the structure of a control device for an electronic expansion valve provided in an embodiment of the present invention.

[0128] like Figure 2 As shown, the apparatus provided in this embodiment may include:

[0129] The acquisition module 21 is used to acquire the indoor and outdoor environmental parameters of the target temperature control system and to acquire the reference pressure value corresponding to the indoor and outdoor environmental parameters from the preset environmental parameter and pressure value correspondence database.

[0130] The calculation module 22 is used to determine the current pressure value and calculate the deviation between the reference pressure value and the current pressure value as the pressure value deviation;

[0131] Control module 23 is used to determine the target control mode in the preset control mode according to the relationship between the pressure value deviation and the preset deviation threshold, and control the opening degree of the electronic expansion valve according to the target control mode; wherein, each preset control mode is set with different electronic expansion valve opening parameters.

[0132] Optionally, the acquisition module is specifically configured to enter the control optimization mode in response to a control optimization mode triggering instruction; and acquire indoor and outdoor environment parameters of the target temperature control system in the control optimization mode.

[0133] Optionally, the control module is specifically configured to determine the first control mode as the target control mode in the preset control mode when the pressure value deviation is greater than or equal to the first preset deviation threshold and less than or equal to the second preset deviation threshold, and control the opening degree of the electronic expansion valve according to the first control mode; wherein the first control mode is to control the opening degree of the electronic expansion valve according to the reference electronic expansion valve opening degree parameter.

[0134] Optionally, the control module is specifically configured to determine the second control mode as the target control mode in the preset control mode when the pressure value deviation is less than the first preset deviation threshold, and control the opening degree of the electronic expansion valve according to the second control mode if the current operation mode of the target temperature control system is the heating operation.

[0135] Wherein, the second control mode is to control the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold.

[0136] Optionally, the control module is specifically configured to determine the second control mode as the target control mode in the preset control mode when the pressure value deviation is greater than the second preset deviation threshold, and control the opening degree of the electronic expansion valve according to the second control mode if the current operation mode of the target temperature control system is the non-heating operation.

[0137] Wherein, the second control mode is to control the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold.

[0138] Optionally, the control module is specifically configured to determine the third control mode as the target control mode in the preset control mode when the pressure value deviation is greater than the second preset deviation threshold, and control the opening degree of the electronic expansion valve according to the third control mode if the current operation mode of the target temperature control system is the heating operation.

[0139] Wherein, the third control mode is to control the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold.

[0140] Optionally, the control module is specifically configured to determine whether the current operation mode of the target temperature control system is the heating operation when the pressure value deviation is less than the first preset deviation threshold, and if the current operation mode of the target temperature control system is the non-heating operation, determine the third control mode as the target control mode in the preset control modes, and control the opening degree of the electronic expansion valve according to the third control mode.

[0141] The third control mode is to control the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold.

[0142] As to the device in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments of the method, and will not be described in detail here.

[0143] It can be understood that by using the technical solution provided in the embodiment, the corresponding reference pressure value is determined according to the indoor and outdoor environmental parameters of the target temperature control system, so as to calculate the deviation of the reference pressure value and the current pressure value as the pressure value deviation, and the target control mode is determined according to the size relationship between the pressure value deviation and the preset deviation threshold, so as to control the opening degree of the electronic expansion valve according to the electronic expansion valve opening degree parameter set in the target control mode. It can be understood that by using the technical solution, the actual operation pressure value of the indoor unit and the outdoor unit can be compared with the preset pressure value, so as to analyze the relative position of the indoor unit and the outdoor unit, to select the control mode, and adjust the opening degree of the electronic expansion valve, thereby improving the actual use effect of refrigeration and heating, and improving the user's refrigeration and heating comfort experience.

[0144] Based on one general inventive concept, the embodiment of the present application also provides an electronic expansion valve control device for implementing the above-mentioned method embodiments.

[0145] Figure 3 is a structural schematic diagram of an electronic expansion valve control device provided by an embodiment of the present application. As shown in Figure 3 The electronic expansion valve control device provided by the embodiment of the present application includes a processor 31 and a memory 32, and the processor is connected to the memory:

[0146] The processor is configured to call and execute the program stored in the memory.

[0147] The memory is configured to store the program, and the program is at least used to execute the electronic expansion valve control method of any one of the above embodiments.

[0148] Based on one general inventive concept, the embodiment of the present application also provides an air conditioner.

[0149] The air conditioner provided by the embodiment of the present application includes the electronic expansion valve control device described in the above embodiments.

[0150] It can be understood that the same or similar parts in the above-mentioned embodiments can be mutually referred to, and the content not described in detail in some embodiments can be referred to the same or similar content in other embodiments.

[0151] It should be noted that, in the description of the present application, the terms "first", "second" and the like are used only for descriptive purposes, and cannot be construed as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is at least two.

[0152] Any process or method descriptions in flow charts or described herein otherwise can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for performing specific logic functions or steps in the process, and the various embodiments of the present application include additional implementations in which the functions described with reference to a given code module, segment, or portion of code are combined with functions described with reference to one or more other code modules, segments, or portions of code. The computer program can be implemented in a non-transitory computer-readable medium, which can be any medium that can store the program for use by or in connection with the instruction execution system, apparatus, or device.

[0153] It should be understood that each part of the present application can be realized by hardware, software, firmware or their combination. In the above-mentioned embodiments, a plurality of steps or methods can be realized by software or firmware stored in the memory and executed by the appropriate instruction execution system. For example, if realized by hardware, and as in another embodiment, it can be realized by any one or their combination of the following technologies known in the art: discrete logic circuit with logic gate circuit for implementing logic function on data signal, application specific integrated circuit with appropriate combination of logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) and the like.

[0154] Those skilled in the art of the present technology can understand that all or part of the steps carried out by the above-mentioned embodiment method can be completed by program instructions to the relevant hardware, and the program can be stored in a computer readable storage medium, which includes one or a combination of steps of the method embodiments when executed.

[0155] In addition, each functional unit in each embodiment of the present application can be integrated in one processing module, or each unit can be physically present separately, or two or more units can be integrated in one module. The above-mentioned integrated module can be realized in the form of hardware or in the form of software functional module. The integrated module, if realized in the form of software functional module and sold or used as an independent product, can also be stored in a computer readable storage medium.

[0156] The above-mentioned storage medium can be read-only memory, magnetic disk or optical disk, etc.

[0157] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0158] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A control method of an electronic expansion valve, characterized by, The method comprises the following steps: obtaining indoor and outdoor environment parameters of a target temperature control system, and obtaining a reference pressure value corresponding to the indoor and outdoor environment parameters in a preset environment parameter-pressure value corresponding relationship library, wherein the reference pressure value is a pressure value corresponding to temperature and humidity in a stable running state when an indoor unit and an outdoor unit of an air conditioner are installed on the same horizontal plane and tested; determining a current pressure value and calculating a deviation between the reference pressure value and the current pressure value as a pressure value deviation; determining a target control mode in a preset control mode according to a size relationship between the pressure value deviation and a preset deviation threshold, and controlling a change in the opening degree of the electronic expansion valve according to the target control mode; wherein different electronic expansion valve opening degree parameters are set for each preset control mode; determining a target control mode in a preset control mode according to a size relationship between the pressure value deviation and a preset deviation threshold, and controlling a change in the opening degree of the electronic expansion valve according to the target control mode; wherein different electronic expansion valve opening degree parameters are set for each preset control mode; when the pressure value deviation is less than a first preset deviation threshold, determining whether the current running mode of the target temperature control system is a heating running mode, and if the current running mode of the target temperature control system is a heating running mode, determining a second control mode as the target control mode in the preset control mode, and controlling the opening degree of the electronic expansion valve according to the second control mode; wherein the second control mode is to control the opening degree of the electronic expansion valve according to a size relationship between the frequency and a preset frequency threshold; in the heating running mode, the greater the frequency, the smaller the decrease in the opening degree of the electronic expansion valve in the second control mode.

2. The method of claim 1, wherein, The method comprises the following steps: in response to a control optimization mode trigger instruction, entering the control optimization mode; in the control optimization mode, obtaining indoor and outdoor environment parameters of the target temperature control system.

3. The method of claim 1, wherein, determining a target control mode in a preset control mode according to a size relationship between the pressure value deviation and a preset deviation threshold, and controlling a change in the opening degree of the electronic expansion valve according to the target control mode; wherein different electronic expansion valve opening degree parameters are set for each preset control mode; when the pressure value deviation is greater than or equal to a first preset deviation threshold and less than or equal to a second preset deviation threshold, determining a first control mode as the target control mode in the preset control mode, and controlling the opening degree of the electronic expansion valve according to the first control mode; wherein the first control mode is to control the opening degree of the electronic expansion valve according to a reference electronic expansion valve opening degree parameter.

4. The method of claim 1, wherein, controlling the opening degree of the electronic expansion valve according to a size relationship between the frequency and a preset frequency threshold; wherein in the heating running mode, if the current frequency is less than a first preset frequency threshold, the opening degree of the electronic expansion valve is controlled to decrease by a first threshold value for a preset time length; if the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to a second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to decrease by a second threshold value for a preset time length; if the current frequency is greater than the second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to decrease by a third threshold value for a preset time length; wherein the first preset frequency threshold is less than the second preset frequency threshold; the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value. ​ 5. The method of claim 1, wherein, The target control mode is determined in a preset control mode according to a size relationship between the pressure value deviation and a preset deviation threshold, and the opening degree of the electronic expansion valve is controlled according to the target control mode, including: When the pressure value deviation is greater than a second preset deviation threshold, it is judged whether the current operation mode of the target temperature control system is heating operation, and if the current operation mode of the target temperature control system is non-heating operation, a second control mode is determined as the target control mode in the preset control mode, and the opening degree of the electronic expansion valve is controlled according to the second control mode. The second control mode is to control the opening degree of the electronic expansion valve according to a size relationship between the frequency and a preset frequency threshold.

6. The method of claim 5, wherein, The second control mode is to control the opening degree of the electronic expansion valve according to a size relationship between the frequency and a preset frequency threshold. In the non-heating operation mode, if the current frequency is less than a first preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by a first threshold value for a preset time length; If the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to a second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by a second threshold value for a preset time length; If the current frequency is greater than the second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by a third threshold value for a preset time length; The first preset frequency threshold is less than the second preset frequency threshold; the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value.

7. The method of claim 1, wherein, The target control mode is determined in a preset control mode according to a size relationship between the pressure value deviation and a preset deviation threshold, and the opening degree of the electronic expansion valve is controlled according to the target control mode, including: When the pressure value deviation is greater than a second preset deviation threshold, it is judged whether the current operation mode of the target temperature control system is heating operation, and if the current operation mode of the target temperature control system is non-heating operation, a second control mode is determined as the target control mode in the preset control mode, and the opening degree of the electronic expansion valve is controlled according to the second control mode. The third control mode is to control the opening degree of the electronic expansion valve according to a size relationship between the frequency and a preset frequency threshold.

8. The method of claim 7, wherein, The third control mode is to control the opening degree of the electronic expansion valve according to a size relationship between the frequency and a preset frequency threshold. In the non-heating operation mode, if the current frequency is less than a first preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by a first threshold value for a preset time length; If the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to a second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by a second threshold value for a preset time length; If the current frequency is greater than the second preset frequency threshold, the opening degree of the electronic expansion valve is controlled to increase by a third threshold value for a preset time length; The first preset frequency threshold is less than the second preset frequency threshold; the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value.

9. The method of claim 1, wherein, The target control mode is determined in a preset control mode according to a size relationship between the pressure value deviation and a preset deviation threshold, and the opening degree of the electronic expansion valve is controlled according to the target control mode, including: determining whether the current operation mode of the target temperature control system is a heating operation when the pressure value deviation is less than a first preset deviation threshold, and determining a third control mode as the target control mode in the preset control mode if the current operation mode of the target temperature control system is not the heating operation, and controlling the opening degree of the electronic expansion valve according to the third control mode; wherein the third control mode is to control the opening degree of the electronic expansion valve according to the size relationship between the frequency and a preset frequency threshold.

10. The method of claim 9, wherein, controlling the opening degree of the electronic expansion valve according to the size relationship between the frequency and the preset frequency threshold, including: in the non-heating operation mode, if the current frequency is less than a first preset frequency threshold, controlling the opening degree of the electronic expansion valve to decrease by a first threshold value, and running for a preset time length; if the current frequency is greater than or equal to the first preset frequency threshold and less than or equal to a second preset frequency threshold, controlling the opening degree of the electronic expansion valve to decrease by a second threshold value, and running for a preset time length; if the current frequency is greater than the second preset frequency threshold, controlling the opening degree of the electronic expansion valve to decrease by a third threshold value, and running for a preset time length; wherein the first preset frequency threshold is less than the second preset frequency threshold, the first threshold value is greater than the second threshold value, and the second threshold value is greater than the third threshold value.

11. A control device for an electronic expansion valve, characterized by including: an acquisition module configured to acquire indoor and outdoor environment parameters of a target temperature control system, and acquire a reference pressure value corresponding to the indoor and outdoor environment parameters in a preset environment parameter and pressure value corresponding relationship library; a calculation module configured to determine a current pressure value, and calculate a deviation between the reference pressure value and the current pressure value as a pressure value deviation, wherein the reference pressure value is a pressure value corresponding to temperature and humidity in a stable running state when an indoor unit and an outdoor unit of an air conditioner are installed on the same horizontal plane and tested; a control module configured to determine a target control mode in a preset control mode according to the size relationship between the pressure value deviation and a preset deviation threshold, and control the opening degree of an electronic expansion valve to change according to the target control mode; wherein different electronic expansion valve opening degree parameters are set for each preset control mode; determining a target control mode in a preset control mode according to the size relationship between the pressure value deviation and a preset deviation threshold, and controlling the opening degree of an electronic expansion valve to change according to the target control mode, including: determining whether the current operation mode of the target temperature control system is a heating operation when the pressure value deviation is less than a first preset deviation threshold, and determining a second control mode as the target control mode in the preset control mode if the current operation mode of the target temperature control system is the heating operation, and controlling the opening degree of the electronic expansion valve according to the second control mode; wherein the second control mode is to control the opening degree of the electronic expansion valve according to the size relationship between the frequency and a preset frequency threshold, and the greater the frequency, the smaller the decrease in the opening degree of the electronic expansion valve in the second control mode when the heating operation is performed.

12. A control device of an electronic expansion valve, characterized by comprising: including a processor and a memory, the processor being connected with the memory: wherein the processor is configured to call and execute a program stored in the memory; the memory is configured to store the program, and the program is at least used to execute the control method of the electronic expansion valve according to any one of claims 1-10.

13. An air conditioner characterized by comprising: A control device including the electronic expansion valve of claim 12.

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