Control method, controller, air conditioner, and storage medium for air conditioner

Abstract

The application provides a control method, a controller, an air conditioner and a storage medium, in the dehumidification mode, the current input voltage, the current evaporating temperature of the evaporator and the target evaporating temperature are obtained; in the case that the current input voltage is less than the first preset voltage, the running state of the air conditioner is controlled according to the current evaporating temperature and the target evaporating temperature. Since long-term low-voltage operation of the air conditioner can cause high-temperature trip of the compressor, the current evaporating temperature and the target evaporating temperature are compared, and the running state is controlled according to the comparison result; if the current evaporating temperature reaches the target evaporating temperature, it indicates that the compressor is not in a high-load state, and the air conditioner can maintain the current running state; if the current evaporating temperature is lower than the target evaporating temperature, it indicates that the compressor is in a high-load running state, and the air conditioner performs corresponding operation to reduce the load of the compressor, thereby reducing the high-temperature trip of the compressor under low voltage, and improving the use experience of the user.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioner control method, controller, air conditioner, and storage medium. Background Technology

[0002] Currently, for existing air conditioners, during the actual dehumidification process, the power supply voltage of the air conditioner may be lower than the lower limit of the voltage value specified by the air conditioner. Under low voltage conditions, the air volume of the air conditioner decreases, which will cause the overall power of the air conditioner to increase. This may cause the compressor to overheat and shut down, making it impossible for users to turn on the air conditioner normally, thus affecting the user experience to some extent. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a control method, controller, air conditioner, and storage medium for an air conditioner, which can reduce the occurrence of compressor overheating and shutdown under low voltage, enabling the air conditioner to operate normally.

[0004] In a first aspect, embodiments of the present invention provide a control method for an air conditioner, comprising: in dehumidification mode, acquiring a current input voltage, a current evaporation temperature of the evaporator, and a target evaporation temperature; and when the current input voltage is less than a first preset voltage, controlling the operating state of the air conditioner according to the current evaporation temperature and the target evaporation temperature.

[0005] The air conditioner control method according to embodiments of the present invention has at least the following beneficial effects: During dehumidification, if the current input voltage is less than a first preset voltage, it indicates that the air conditioner is operating under low voltage. Since prolonged operation under low voltage can cause the compressor to overheat and shut down, this embodiment compares the current evaporation temperature of the evaporator with the target evaporation temperature. Based on the comparison result, it determines whether the compressor is operating under high load and then controls the air conditioner's operating state accordingly. Specifically, if the current evaporation temperature is higher than or equal to the target evaporation temperature, it indicates that although the compressor is operating under low voltage, it is not operating under high load, and the air conditioner can maintain its current operating state. If the current evaporation temperature is lower than the target evaporation temperature, it indicates that the compressor is operating under low voltage and under high load. In this case, the embodiment responds by executing corresponding operations to reduce the compressor's load, thereby reducing the likelihood of the compressor overheating and shutting down under low voltage, allowing the air conditioner to operate normally and improving the user experience.

[0006] According to some embodiments of the present invention, the target evaporation temperature is obtained by the following steps: acquiring indoor air temperature, indoor air humidity, rated power supply parameters, and the rated evaporation temperature of the evaporator; and determining the target evaporation temperature based on the indoor air temperature, the indoor air humidity, the current input voltage, the rated power supply parameters, and the rated evaporation temperature.

[0007] According to some embodiments of the present invention, determining the target evaporation temperature based on the indoor air temperature, the indoor air humidity, the current input voltage, the rated power supply parameters, and the rated evaporation temperature includes: determining the dew point temperature based on the indoor air temperature and the indoor air humidity; and determining the target evaporation temperature based on the dew point temperature, the current input voltage, the rated power supply parameters, and the rated evaporation temperature.

[0008] According to some embodiments of the present invention, the rated power supply parameters include a rated voltage, and determining the target evaporation temperature based on the dew point temperature, the current input voltage, the rated power supply parameters, and the rated evaporation temperature includes: calculating a first difference between the rated voltage and a first preset voltage, a second difference between the rated voltage and the current input voltage, and a third difference between the dew point temperature and the rated evaporation temperature; wherein the first preset voltage is less than the rated voltage, and the first preset voltage is calculated from the rated voltage; and the target evaporation temperature is calculated based on the dew point temperature, the first difference, the second difference, and the third difference.

[0009] According to some embodiments of the present invention, the air conditioner includes a throttling device, and controlling the operating state of the air conditioner according to the current evaporation temperature and the target evaporation temperature includes: increasing the opening degree of the throttling device and / or reducing the operating frequency of the compressor when the current evaporation temperature is lower than the target evaporation temperature.

[0010] According to some embodiments of the present invention, at least one of the following is included: When increasing the opening degree of the throttling device, increasing the opening degree of the throttling device includes: obtaining the current opening degree and the upper limit value of the opening degree of the throttling device; when the current opening degree is less than the upper limit value of the opening degree, determining a first target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature and the current opening degree; when the first target opening degree is less than or equal to the upper limit value of the opening degree, increasing the throttling device from the current opening degree to the first target opening degree; When reducing the operating frequency of the compressor, the reduction of the operating frequency of the compressor includes: obtaining the current opening degree and the upper limit value of the opening degree of the throttling device; when the current opening degree is equal to the upper limit value of the opening degree, determining the first target operating frequency of the compressor based on the current evaporation temperature and the target evaporation temperature, and reducing the operating frequency of the compressor to the first target operating frequency. When increasing the opening degree of the throttling device and reducing the operating frequency of the compressor, the steps of increasing the opening degree of the throttling device and reducing the operating frequency of the compressor include: obtaining the current opening degree and the upper limit value of the opening degree of the throttling device; when the current opening degree is less than the upper limit value, determining a first target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature, and the current opening degree; when the first target opening degree is greater than the upper limit value, increasing the opening degree of the throttling device to the upper limit value and determining a second target operating frequency of the compressor, and reducing the operating frequency of the compressor to the second target operating frequency.

[0011] According to some embodiments of the present invention, the air conditioner includes a throttling device, and controlling the operating state of the air conditioner according to the current evaporation temperature and the target evaporation temperature includes: when the current evaporation temperature is greater than or equal to the target evaporation temperature and the current evaporation temperature is greater than a preset temperature, reducing the opening degree of the throttling device and / or increasing the operating frequency of the compressor, wherein the preset temperature is lower than the dew point temperature and the temperature difference between the preset temperature and the dew point temperature is less than a preset difference value, and the dew point temperature is determined by the indoor air temperature and the indoor air humidity.

[0012] According to some embodiments of the present invention, at least one of the following is included: When reducing the opening degree of the throttling device, the reduction of the opening degree of the throttling device includes: obtaining the current opening degree and the lower limit value of the opening degree of the throttling device; when the current opening degree is greater than the lower limit value of the opening degree, determining the second target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature and the current opening degree; when the second target opening degree is greater than or equal to the lower limit value of the opening degree, reducing the throttling device from the current opening degree to the second target opening degree; In the case of increasing the operating frequency of the compressor, the method of increasing the operating frequency of the compressor includes: obtaining the current opening degree and the lower limit value of the opening degree of the throttling device; when the current opening degree is equal to the lower limit value of the opening degree, determining the third target operating frequency of the compressor based on the current evaporation temperature and the target evaporation temperature, and increasing the operating frequency of the compressor to the third target operating frequency. When reducing the opening degree of the throttling device and increasing the operating frequency of the compressor, the reduction of the opening degree of the throttling device and the increase of the operating frequency of the compressor include: obtaining the current opening degree and the lower limit value of the opening degree of the throttling device; when the current opening degree is greater than the lower limit value of the opening degree, determining a second target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature, and the current opening degree; when the second target opening degree is less than the lower limit value of the opening degree, reducing the opening degree of the throttling device to the lower limit value of the opening degree and determining a fourth target operating frequency of the compressor, and increasing the operating frequency of the compressor to the fourth target operating frequency.

[0013] According to some embodiments of the present invention, controlling the operating state of the air conditioner based on the current evaporation temperature and the target evaporation temperature includes: maintaining the current operating state of the air conditioner when the current evaporation temperature is greater than or equal to the target evaporation temperature and the current evaporation temperature is less than or equal to a preset temperature.

[0014] In a second aspect, embodiments of the present invention provide a controller, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the control method for an air conditioner as described in the first aspect above when running the computer program.

[0015] The controller according to embodiments of the present invention has at least the following beneficial effects: During the dehumidification process of the air conditioner, if the current input voltage is less than a first preset voltage, it indicates that the air conditioner is operating under low voltage. Since prolonged operation under low voltage can cause the compressor to overheat and shut down, this embodiment compares the current evaporation temperature of the evaporator with the target evaporation temperature, and then determines whether the compressor is operating under high load based on the comparison result. Subsequently, it controls the operating state of the air conditioner accordingly. Specifically, if the current evaporation temperature is higher than or equal to the target evaporation temperature, it indicates that although the compressor is operating under low voltage, it is not operating under high load, and the air conditioner can maintain its current operating state. If the current evaporation temperature is lower than the target evaporation temperature, it indicates that the compressor is operating under low voltage and under high load, and the embodiment responds by executing corresponding operations to reduce the compressor's load, thereby reducing the likelihood of the compressor overheating and shutting down under low voltage, allowing the air conditioner to operate normally and improving the user experience.

[0016] Thirdly, embodiments of the present invention provide an air conditioner including a controller as described in the second aspect above.

[0017] The air conditioner according to embodiments of the present invention has at least the following beneficial effects: During dehumidification, if the current input voltage is less than a first preset voltage, it indicates that the air conditioner is operating under low voltage. Since prolonged operation under low voltage can cause the compressor to overheat and shut down, this embodiment compares the current evaporation temperature of the evaporator with the target evaporation temperature. Based on the comparison result, it determines whether the compressor is operating under high load and then controls the air conditioner's operating state accordingly. Specifically, if the current evaporation temperature is higher than or equal to the target evaporation temperature, it indicates that although the compressor is operating under low voltage, it is not operating under high load, and the air conditioner can maintain its current operating state. If the current evaporation temperature is lower than the target evaporation temperature, it indicates that the compressor is operating under low voltage and under high load. In this case, the embodiment responds by performing corresponding operations to reduce the compressor's load, thereby reducing the likelihood of the compressor overheating and shutting down under low voltage, allowing the air conditioner to operate normally and improving the user experience.

[0018] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions for performing the control method of an air conditioner as described in the first aspect above.

[0019] The computer-readable storage medium according to embodiments of the present invention has at least the following beneficial effects: During the dehumidification process of the air conditioner, if the current input voltage is less than a first preset voltage, it indicates that the air conditioner is operating under low voltage. Since prolonged operation under low voltage can cause the compressor to overheat and shut down, this embodiment of the present invention compares the current evaporation temperature of the evaporator with the target evaporation temperature, and then determines whether the compressor is operating under high load based on the comparison result. Subsequently, it controls the operating state of the air conditioner accordingly. Specifically, if the current evaporation temperature is higher than or equal to the target evaporation temperature, it indicates that although the compressor is operating under low voltage, it is not operating under high load, and the air conditioner can maintain its current operating state. If the current evaporation temperature is lower than the target evaporation temperature, it indicates that the compressor is operating under low voltage and under high load, and the embodiment of the present invention will respond by executing corresponding operations to reduce the compressor's load, thereby reducing the likelihood of the compressor overheating and shutting down under low voltage, allowing the air conditioner to operate normally and improving the user experience.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0022] Figure 1 This is a schematic diagram of a system architecture platform for performing a control method for an air conditioner according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an air conditioner provided in one embodiment of the present invention; Figure 3 This is a flowchart of an air conditioner control method provided in one embodiment of the present invention; Figure 4 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 5 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 6 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 7 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 8 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 9 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 10 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 11 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 12 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 13 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 14 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 15 This is a flowchart of an air conditioner control method provided in another embodiment of the present invention; Figure 16 This is an overall flowchart of an air conditioner control method provided in one embodiment of the present invention. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0025] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0027] In some cases, for existing air conditioners, during the actual dehumidification process, the power supply voltage of the air conditioner may be lower than the lower limit of the voltage value specified by the air conditioner. Under low voltage conditions, the air volume of the air conditioner decreases, which will cause the overall power of the air conditioner to increase. This may cause the compressor to overheat and shut down, making it impossible for users to turn on the air conditioner normally, thus affecting the user experience to some extent.

[0028] Based on the above, this invention provides a control method, controller, air conditioner, and storage medium for an air conditioner. When the air conditioner operates in dehumidification mode under low voltage, it acquires the current evaporation temperature and the target evaporation temperature of the evaporator, compares the current evaporation temperature and the target evaporation temperature, and then determines whether the compressor is operating under high load based on the comparison result. If the compressor is operating under high load, this invention will respond by executing corresponding operations to reduce the compressor's load, thereby reducing the occurrence of compressor overheating and shutdown under low voltage, enabling the air conditioner to operate normally and improving the user experience.

[0029] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0030] like Figure 1 As shown, Figure 1 This is a schematic diagram of a system architecture platform for performing a control method for an air conditioner, provided in an embodiment of the present invention.

[0031] The system architecture platform 100 of this embodiment includes one or more processors 110 and a memory 120. Figure 1 The example uses a processor 110 and a memory 120.

[0032] Processor 110 and memory 120 can be connected via a bus or other means. Figure 1 Taking the example of a connection between China and Israel via a bus.

[0033] Memory 120, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 120 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 120 may optionally include memory 120 remotely located relative to processor 110, and these remote memories can be connected to the system architecture platform 100 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0034] Those skilled in the art will understand that Figure 1 The device structure shown does not constitute a limitation on the system architecture platform 100, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0035] exist Figure 1 In the system architecture platform 100 shown, the processor 110 can be used to call the control program of the air conditioner stored in the memory 120, thereby realizing the control method of the air conditioner.

[0036] Based on the hardware structure of the above-mentioned system architecture platform 100, various embodiments of the air conditioner of the present invention are proposed.

[0037] like Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of an air conditioner provided in one embodiment of the present invention.

[0038] Specifically, the air conditioner in this embodiment of the invention is an air conditioning device, which may include, but is not limited to, an outdoor unit and an indoor unit. The outdoor unit includes, but is not limited to, a compressor 210 and a condenser 220, and the indoor unit includes, but is not limited to, a throttling device 230, an evaporator 240 and a temperature and humidity sensor 250. The compressor 210, the condenser 220, the throttling device 230 and the evaporator 240 together constitute a refrigerant circuit.

[0039] Alternatively, the air conditioner in this embodiment of the invention can also be an inverter dehumidifier that integrates a compressor 210, a condenser 220, a throttling device 230, an evaporator 240 and a temperature and humidity sensor 250.

[0040] It should be noted that the throttling device 230 can be an electronic expansion valve with multiple opening adjustment functions.

[0041] Additionally, it should be noted that the temperature and humidity sensor 250 can be used to collect the air temperature and humidity at the air inlet of the evaporator 240, or it can be used to collect the air temperature and humidity at other locations in the room.

[0042] It is understood that the air conditioner in this embodiment of the invention can communicate with the controller so that the controller can control the opening degree of the throttling device 230 and the operating frequency of the compressor 210.

[0043] Furthermore, it is understood that the structure of the aforementioned controller may include, for example: Figure 1 The processor 110 and memory 120 are shown.

[0044] In addition, it is understood that the aforementioned controller can be installed either on the air conditioner or independently outside the air conditioner.

[0045] Based on the above-mentioned system architecture platform 100 and the hardware structure of the air conditioner, various embodiments of the air conditioner control method of the present invention are proposed.

[0046] like Figure 3 As shown, Figure 3 This is a flowchart of a control method for an air conditioner according to an embodiment of the present invention. The control method includes, but is not limited to, steps S100 and S200.

[0047] Step S100: In dehumidification mode, obtain the current input voltage, the current evaporation temperature of the evaporator, and the target evaporation temperature.

[0048] It should be noted that the current input voltage mentioned above can refer to the current input voltage of the entire air conditioner or the current input voltage of the compressor. The specific detection location of the current input voltage is not limited in the embodiments of the present invention.

[0049] In addition, to obtain the aforementioned current input voltage, embodiments of the present invention may add a voltage acquisition module to obtain the current input voltage of the entire air conditioner, or a voltage acquisition module to obtain the current input voltage of the compressor. Alternatively, embodiments of the present invention may add a current acquisition module to obtain the current input current of the entire air conditioner and calculate the current input voltage of the entire air conditioner; or a current acquisition module may be added to obtain the current input current of the compressor and calculate the current input voltage of the compressor.

[0050] It should be noted that the current evaporation temperature of the evaporator mentioned above is used to characterize the current refrigerant temperature in the evaporator, which can refer to the temperature in the middle of the evaporator or the temperature at other locations; when the current evaporation temperature of the evaporator is the temperature in the middle of the evaporator main pipe, it is used to characterize the temperature of the refrigerant at the middle location of the main pipe in the evaporator.

[0051] It is understood that, in embodiments of the present invention, a temperature sensor can be installed on the surface of the evaporator, such as at the center of the evaporator, to collect the current evaporation temperature of the evaporator in real time.

[0052] It is understood that the temperature sensor in the embodiments of the present invention can be a contact temperature sensor or a non-contact temperature sensor; in addition, the temperature sensor in the embodiments of the present invention can be an infrared temperature sensor or other types of temperature sensors, and the embodiments of the present invention do not limit the type of temperature sensor.

[0053] It is worth noting that the target evaporation temperature mentioned above specifically refers to the temperature used to determine whether the compressor is currently operating under high load. If the current evaporation temperature is lower than the target evaporation temperature, it indicates that the compressor is operating under high load, and long-term operation under low voltage will cause the compressor to overheat and shut down. If the current evaporation temperature is higher than or equal to the target evaporation temperature, it indicates that the compressor is not operating under high load, and long-term operation under low voltage will not cause the compressor to overheat and shut down.

[0054] The target evaporation temperature can be obtained by calculating based on the current operating parameters and environmental parameters of the air conditioner, or by retrieving a pre-stored temperature from the local memory, or by retrieving a temperature input by the user. This embodiment of the invention does not limit the method of obtaining the target evaporation temperature.

[0055] Step S200: When the current input voltage is less than the first preset voltage, control the operating status of the air conditioner according to the current evaporation temperature and the target evaporation temperature.

[0056] It should be noted that the first preset voltage mentioned above specifically refers to the voltage used to determine whether the current input voltage is low. If the current input voltage is less than the first preset voltage, it indicates that the air conditioner is in a low voltage operating state. If the current input voltage is greater than or equal to the first preset voltage, it indicates that the air conditioner is not in a low voltage operating state.

[0057] The first preset voltage can be obtained from a pre-stored voltage value in a local memory, a voltage value input by the user, or downloaded from the manufacturer's server via the Internet. This embodiment of the invention does not limit the method of obtaining the first preset voltage.

[0058] Based on steps S100 to S200 above, according to the technical solution of this embodiment of the invention, during the dehumidification process of the air conditioner, if the current input voltage is less than the first preset voltage, it indicates that the air conditioner is currently operating under low voltage. Since long-term operation of the air conditioner under low voltage will cause the compressor to overheat and shut down, this embodiment of the invention compares the current evaporation temperature of the evaporator with the target evaporation temperature, and then determines whether the compressor is in a high-load operation state based on the comparison result, and then controls the operation state of the air conditioner accordingly. Specifically, if the current evaporation temperature is higher than or equal to the target evaporation temperature, it indicates that although the compressor is currently under low voltage, it is not in a high-load operation state, so the air conditioner of this embodiment of the invention can maintain the current operation state; if the current evaporation temperature is lower than the target evaporation temperature, it indicates that the compressor is currently under low voltage and in a high-load operation state, so this embodiment of the invention will respond by executing the corresponding operation to reduce the compressor's load operation state, thereby reducing the occurrence of compressor overheating and shutting down under low voltage, enabling the air conditioner to operate normally and improving the user experience.

[0059] It is understandable that if the current evaporation temperature is lower than the target evaporation temperature, then the embodiments of the present invention can reduce the occurrence of high-temperature shutdown of the air conditioner under low voltage by reducing the frequency of the compressor.

[0060] In addition, such as Figure 4 As shown, Figure 4 This is a flowchart of a control method for an air conditioner provided in one embodiment of the present invention. The target evaporation temperature mentioned in steps S100 and S200 above can be obtained through, but is not limited to, steps S300 and S400.

[0061] Step S300: Obtain indoor air temperature, indoor air humidity, rated power supply parameters, and rated evaporation temperature of the evaporator; Step S400: Determine the target evaporation temperature based on the indoor air temperature, indoor air humidity, current input voltage, rated power supply parameters, and rated evaporation temperature.

[0062] Specifically, the aforementioned indoor air temperature can be the air temperature at the evaporator's air inlet or the air temperature at other locations in the room; secondly, the aforementioned indoor air humidity can be the air humidity at the evaporator's air inlet or the air humidity at other locations in the room.

[0063] In this embodiment of the invention, indoor air temperature can be obtained through a temperature sensor, and indoor air humidity can be obtained through a humidity sensor. Specifically, in addition to obtaining the air temperature at the evaporator inlet through a temperature sensor, this embodiment of the invention can also obtain the indoor ambient air temperature through a temperature sensor; furthermore, in addition to obtaining the air humidity at the evaporator inlet through a humidity sensor, this embodiment of the invention can also obtain the indoor ambient air humidity through a humidity sensor.

[0064] It should be noted that the rated power supply parameters mentioned above can be the rated power supply parameters of the entire air conditioner or the rated power supply parameters of the compressor; wherein, the rated power supply parameters can be parameters such as rated voltage, rated current or rated power, and the embodiments of the present invention do not limit the type of rated power supply parameters.

[0065] Additionally, it should be noted that the rated evaporation temperature mentioned above refers to the evaporation temperature of the evaporator under rated power supply parameters and at specific indoor air temperature and humidity conditions. This rated evaporation temperature can be obtained through experimental testing or calculation.

[0066] After obtaining the indoor air temperature, indoor air humidity, rated power supply parameters, and rated evaporation temperature of the evaporator, this invention will calculate the indoor air temperature, indoor air humidity, rated power supply parameters, and rated evaporation temperature to obtain the target evaporation temperature of the evaporator.

[0067] In addition, such as Figure 5 As shown, Figure 5 This is a flowchart of a control method for an air conditioner provided in one embodiment of the present invention. The determination of the target evaporation temperature based on indoor air temperature, indoor air humidity, current input voltage, rated power supply parameters, and rated evaporation temperature in step S400 may include, but is not limited to, steps S410 and S420.

[0068] Step S410: Determine the dew point temperature based on the indoor air temperature and indoor air humidity; Step S420: Determine the target evaporation temperature based on the dew point temperature, current input voltage, rated power supply parameters, and rated evaporation temperature.

[0069] Specifically, in this embodiment of the invention, the dew point temperature can be determined first based on the indoor air temperature and indoor air humidity, and then the dew point temperature, the current input voltage, the rated power supply parameters and the rated evaporation temperature can be calculated to obtain the target evaporation temperature of the evaporator.

[0070] In addition, such as Figure 6 As shown, Figure 6 This is a flowchart of a control method for an air conditioner provided in one embodiment of the present invention. The determination of the target evaporation temperature based on the dew point temperature, current input voltage, rated power supply parameters, and rated evaporation temperature in step S420 may include, but is not limited to, steps S421 and S422.

[0071] Step S421: Calculate the first difference between the rated voltage and the first preset voltage, the second difference between the rated voltage and the current input voltage, and the third difference between the dew point temperature and the rated evaporation temperature; wherein, the first preset voltage is less than the rated voltage, and the first preset voltage is calculated from the rated voltage; Step S422: Calculate the target evaporation temperature based on the dew point temperature, the first difference, the second difference, and the third difference.

[0072] Specifically, in this embodiment of the invention, a first difference between the rated voltage and the first preset voltage can be calculated, a second difference between the rated voltage and the current input voltage can be calculated, and a third difference between the dew point temperature and the rated evaporation temperature can be calculated. Then, the dew point temperature, the first difference, the second difference, and the third difference are calculated to obtain the target evaporation temperature.

[0073] It should be noted that, regarding the aforementioned first preset voltage and rated voltage, under certain circumstances, the first preset voltage may be less than the rated voltage; for example, the first preset voltage may correspond to 80% of the rated voltage, or the first preset voltage may correspond to 70% of the rated voltage.

[0074] In addition, such as Figure 7 As shown, Figure 7 This is a flowchart of an air conditioner control method according to an embodiment of the present invention. The step S200 above, which controls the air conditioner's operating state based on the current evaporation temperature and the target evaporation temperature, may include, but is not limited to, step S500.

[0075] Step S500: When the current evaporation temperature is lower than the target evaporation temperature, increase the opening of the throttling device and / or reduce the operating frequency of the compressor.

[0076] Specifically, if the current evaporation temperature is lower than the target evaporation temperature, it indicates that the compressor is currently operating under low voltage and high load. In this embodiment of the invention, the opening of the throttling device will be increased and / or the operating frequency of the compressor will be reduced to alleviate the compressor's load operation, thereby reducing the occurrence of high-temperature shutdown of the air conditioner under low voltage, enabling the air conditioner to operate normally and improving the user experience.

[0077] Additionally, it should be noted that the valve opening of the throttling device in this embodiment of the invention can be controlled by a stepper motor. Therefore, the air conditioner can obtain the current opening of the throttling device through the current control state of the stepper motor, and the air conditioner can also obtain the opening adjustment range of the throttling device through the permissible control state of the stepper motor, such as the permissible rotation angle.

[0078] It is understood that the opening adjustment range mentioned above refers to the range in which the throttling device can operate. The throttling device can only be adjusted within the opening adjustment range and cannot be adjusted outside the opening adjustment range.

[0079] It is worth noting that, regarding step S500 above, which involves increasing the opening of the throttling device and / or reducing the operating frequency of the compressor when the current evaporation temperature is lower than the target evaporation temperature, this can specifically include: Figures 8 to 10 The implementation details are as follows: like Figure 8 As shown, Figure 8 This is a flowchart of a control method for an air conditioner provided in one embodiment of the present invention. When increasing the opening degree of the throttling device, the increase in the opening degree of the throttling device in step S500 above may include, but is not limited to, steps S511, S512, and S513.

[0080] Step S511: Obtain the current opening degree and the upper limit value of the opening degree of the throttling device; Step S512: When the current opening degree is less than the upper limit of the opening degree, determine the first target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature and the current opening degree; Step S513: When the first target opening is less than or equal to the upper limit of the opening, the throttling device is increased from the current opening to the first target opening.

[0081] Specifically, after determining the first target opening degree of the throttling device, this embodiment of the invention also needs to determine whether the first target opening degree falls within the opening degree adjustment range of the throttling device, that is, whether the first target opening degree is less than or equal to the upper limit value of the opening degree adjustment range. If the first target opening degree is less than or equal to the upper limit value, it indicates that this embodiment of the invention can make the evaporator evaporation temperature greater than or equal to the target evaporation temperature by adjusting the opening degree of the throttling device to the first target opening degree, thereby avoiding the phenomenon of compressor high-temperature shutdown. In this case, this embodiment of the invention only needs to adjust the opening degree of the throttling device to the first target opening degree.

[0082] like Figure 9 As shown, Figure 9 This is a flowchart of a control method for an air conditioner provided in one embodiment of the present invention. When reducing the operating frequency of the compressor, the reduction of the compressor's operating frequency in step S500 may include, but is not limited to, steps S521, S522, and S523.

[0083] Step S521: Obtain the current opening degree and the upper limit value of the opening degree of the throttling device; Step S522: When the current opening degree is equal to the upper limit of the opening degree, determine the first target operating frequency of the compressor based on the current evaporation temperature and the target evaporation temperature; Step S523: Reduce the operating frequency of the compressor to the first target operating frequency.

[0084] Specifically, if the current opening degree is equal to the upper limit of the opening degree, the opening degree of the throttling device cannot be increased further. In this regard, the present invention will directly reduce the frequency of the compressor, so that the operating frequency of the compressor is reduced to the first target operating frequency, so as to avoid the phenomenon of the compressor tripping due to high temperature.

[0085] like Figure 10 As shown, Figure 10 This is a flowchart of a control method for an air conditioner provided in one embodiment of the present invention. When increasing the opening degree of the throttling device and reducing the operating frequency of the compressor, the actions of increasing the opening degree of the throttling device and reducing the operating frequency of the compressor in step S500 may include, but are not limited to, steps S531, S532, and S533.

[0086] Step S531: Obtain the current opening degree and the upper limit value of the opening degree of the throttling device; Step S532: When the current opening degree is less than the upper limit of the opening degree, determine the first target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature and the current opening degree; Step S533: When the first target opening degree is greater than the upper limit of the opening degree, increase the opening degree of the throttling device to the upper limit of the opening degree and determine the second target operating frequency of the compressor, and reduce the operating frequency of the compressor to the second target operating frequency.

[0087] Specifically, after determining the first target opening degree of the throttling device, this embodiment of the invention also needs to determine whether the first target opening degree falls within the opening degree adjustment range of the throttling device, that is, whether the first target opening degree is less than or equal to the upper limit value of the opening degree adjustment range. If the first target opening degree is greater than the upper limit value, it indicates that even if this embodiment of the invention adjusts the opening degree of the throttling device to the upper limit value of the opening degree adjustment range, that is, adjusts the opening degree of the throttling device to the maximum opening degree, it is still impossible for the evaporator to reach the target evaporation temperature. In this case, after adjusting the opening degree of the throttling device to the upper limit value of the opening degree adjustment range, this embodiment of the invention further reduces the operating frequency of the compressor to achieve the target evaporation temperature.

[0088] It should be noted that, in order to reduce the frequency adjustment range of the compressor, this embodiment of the invention will first adjust the opening degree of the throttling device to the upper limit of the opening degree adjustment range, that is, adjust the opening degree of the throttling device to the maximum allowable opening degree, and then adjust the frequency of the compressor. This can reduce the dehumidification effect caused by excessive frequency adjustment range of the compressor.

[0089] In addition, such as Figure 11 As shown, Figure 11 This is a flowchart of an air conditioner control method according to an embodiment of the present invention. The step S200 above, which controls the air conditioner's operating state based on the current evaporation temperature and the target evaporation temperature, may include, but is not limited to, step S600.

[0090] Step S600: When the current evaporation temperature is greater than or equal to the target evaporation temperature and the current evaporation temperature is greater than the preset temperature, reduce the opening of the throttling device and / or increase the operating frequency of the compressor, wherein the preset temperature is lower than the dew point temperature and the temperature difference between the preset temperature and the dew point temperature is less than the preset difference value, and the dew point temperature is determined by the indoor air temperature and the indoor air humidity.

[0091] Specifically, the preset temperature mentioned above refers to a temperature value lower than the dew point temperature. When the evaporator's evaporation temperature approaches the dew point temperature, its dehumidification effect will deteriorate. Therefore, this embodiment of the invention obtains the dew point temperature and a preset difference, and then calculates the preset temperature based on the dew point temperature and the preset difference. The temperature difference between this preset temperature and the dew point temperature is less than the preset difference to ensure that the dehumidifier can dehumidify. If the current evaporator temperature is greater than the preset temperature, it indicates that the dehumidification effect will be poor at this time.

[0092] The aforementioned preset difference can be set manually.

[0093] Specifically, if the current evaporation temperature is greater than or equal to the target evaporation temperature and the current evaporation temperature is greater than the preset temperature, it indicates that the compressor is currently operating at low voltage. Although the compressor is not operating at high load, the evaporation temperature of the evaporator is too high, resulting in poor or no dehumidification effect. In this embodiment of the invention, the opening of the throttling device will be reduced and / or the operating frequency of the compressor will be increased to reduce the evaporation temperature of the evaporator, thereby improving the dehumidification effect of the evaporator.

[0094] Additionally, it should be noted that the valve opening of the throttling device in this embodiment of the invention can be controlled by a stepper motor. Therefore, the air conditioner can obtain the current opening of the throttling device through the current control state of the stepper motor, and the air conditioner can also obtain the opening adjustment range of the throttling device through the permissible control state of the stepper motor, such as the permissible rotation angle.

[0095] It is understood that the opening adjustment range mentioned above refers to the range in which the throttling device can operate. The throttling device can only be adjusted within the opening adjustment range and cannot be adjusted outside the opening adjustment range.

[0096] It is worth noting that the reduction of the throttling device opening and / or the increase of the compressor operating frequency in step S600 above can specifically include: Figures 12 to 14 The implementation details are as follows: like Figure 12 As shown, Figure 12 This is a flowchart of a control method for an air conditioner provided in one embodiment of the present invention. When reducing the opening degree of the throttling device, the reduction of the opening degree of the throttling device in step S600 may include, but is not limited to, steps S611, S612, and S613.

[0097] Step S611: Obtain the current opening degree and lower limit value of the throttling device; Step S612: When the current opening degree is greater than the lower limit of the opening degree, determine the second target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature and the current opening degree; Step S613: When the second target opening is greater than or equal to the lower limit of the opening, reduce the throttling device from the current opening to the second target opening.

[0098] Specifically, after determining the second target opening degree of the throttling device, this embodiment of the invention also needs to determine whether the second target opening degree falls within the opening degree adjustment range of the throttling device, that is, whether the second target opening degree is greater than or equal to the lower limit value of the opening degree adjustment range. If the second target opening degree is greater than or equal to the lower limit value, it indicates that this embodiment of the invention can improve the dehumidification effect of the evaporator by adjusting the opening degree of the throttling device to the second target opening degree, thereby making the evaporation temperature of the evaporator lower than the preset temperature. In this case, this embodiment of the invention only needs to adjust the opening degree of the throttling device to the second target opening degree.

[0099] like Figure 13 As shown, Figure 13 This is a flowchart of a control method for an air conditioner provided in one embodiment of the present invention. When increasing the operating frequency of the compressor, the increase in the operating frequency of the compressor in step S600 may include, but is not limited to, steps S621, S622, and S623.

[0100] Step S621: Obtain the current opening degree and lower limit value of the throttling device; Step S622: When the current opening degree is equal to the lower limit of the opening degree, determine the third target operating frequency of the compressor based on the current evaporation temperature and the target evaporation temperature; Step S623: Increase the operating frequency of the compressor to the third target operating frequency.

[0101] Specifically, if the current opening degree is equal to the lower limit of the opening degree, the opening degree of the throttling device cannot be further reduced. In this regard, the present invention will directly increase the frequency of the compressor, so that the operating frequency of the compressor is increased to the third target operating frequency, thereby making the evaporator evaporation temperature lower than the preset temperature, so as to improve the dehumidification effect of the evaporator.

[0102] like Figure 14 As shown, Figure 14 This is a flowchart of a control method for an air conditioner provided in one embodiment of the present invention. When reducing the opening degree of the throttling device and increasing the operating frequency of the compressor, the reduction of the opening degree of the throttling device and the increase of the operating frequency of the compressor in step S600 may include, but are not limited to, steps S631, S632, and S633.

[0103] Step S631: Obtain the current opening degree and lower limit value of the throttling device; Step S632: When the current opening degree is greater than the lower limit of the opening degree, determine the second target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature and the current opening degree; Step S633: When the second target opening degree is less than the lower limit of the opening degree, reduce the opening degree of the throttling device to the lower limit of the opening degree and determine the fourth target operating frequency of the compressor, and increase the operating frequency of the compressor to the fourth target operating frequency.

[0104] Specifically, after determining the second target opening degree of the throttling device, this embodiment of the invention also needs to determine whether the second target opening degree falls within the opening degree adjustment range of the throttling device, that is, whether the second target opening degree is greater than or equal to the lower limit of the opening degree adjustment range. If the second target opening degree is less than the lower limit, it indicates that even if this embodiment of the invention adjusts the opening degree of the throttling device to the lower limit of the opening degree adjustment range, that is, adjusts the opening degree of the throttling device to the minimum opening degree, it is still impossible to make the evaporator evaporation temperature lower than the preset temperature. In this case, after adjusting the opening degree of the throttling device to the lower limit of the opening degree adjustment range, this embodiment of the invention further increases the operating frequency of the compressor to make the evaporator evaporation temperature lower than the preset temperature.

[0105] It should be noted that, in order to reduce the frequency adjustment range of the compressor, this embodiment of the invention will first adjust the opening degree of the throttling device to the lower limit of the opening degree adjustment range, that is, adjust the opening degree of the throttling device to the minimum allowable opening degree, and then adjust the frequency of the compressor. This can reduce the problem of increased energy consumption caused by excessive frequency adjustment range of the compressor.

[0106] In addition, such as Figure 15 As shown, Figure 15 This is a flowchart of an air conditioner control method provided in one embodiment of the present invention. The step S200 above, which controls the air conditioner's operating state based on the current evaporation temperature and the target evaporation temperature, may include, but is not limited to, step S700.

[0107] Step S700: When the current evaporation temperature is greater than or equal to the target evaporation temperature and the current evaporation temperature is less than or equal to the preset temperature, maintain the current operating state of the air conditioner.

[0108] Specifically, if the current evaporation temperature is greater than or equal to the target evaporation temperature and the current evaporation temperature is less than or equal to the preset temperature, it indicates that the compressor is not operating under high load and also has a good dehumidification effect. Therefore, under this condition, the air conditioner of this embodiment of the invention will maintain its original operating state.

[0109] Based on the control methods of the air conditioner described in the above embodiments, the overall embodiments of the control methods of the air conditioner of the present invention are presented below.

[0110] like Figure 16 As shown, Figure 16This is an overall flowchart of an air conditioner control method provided in one embodiment of the present invention.

[0111] For ease of description, the parameters in the embodiments of the present invention are defined as follows: Dry bulb temperature T1, which is the indoor air temperature mentioned above: the air temperature on the air inlet side of the dehumidifier evaporator, is collected by a temperature sensor.

[0112] Relative humidity RH, also known as indoor air humidity, is the ratio of the partial pressure of water vapor pv in humid air to the partial pressure of water vapor ps(t) in saturated humid air at the same temperature and total pressure. It can be obtained by a humidity sensor located on the air inlet side of the dehumidifier.

[0113] Dew point temperature Td: The temperature at which dew will form when unsaturated moist air cools to saturation and is about to condense under a certain water vapor partial pressure pv.

[0114] Rated evaporation temperature T2”: Under normal voltage mode, the evaporation temperature of the dehumidifier at a certain dry bulb temperature T1 and relative humidity RH can be obtained by laboratory testing.

[0115] The minimum allowable evaporation temperature T2', which is the target evaporation temperature mentioned above, is the lowest allowable evaporation temperature during dehumidifier operation in low voltage mode, and is related to voltage, dew point temperature, and rated evaporation temperature T2".

[0116] The actual evaporation temperature T2, also known as the current evaporation temperature mentioned above, is the actual evaporation temperature during the operation of the dehumidifier. It can be obtained by a temperature sensor located on the heat exchange copper tube in the middle of the evaporator.

[0117] Based on the above parameter definitions, the overall control of this embodiment of the invention is as follows: Determine whether the dehumidifier has entered a low-voltage operation mode based on the current input voltage of the unit; after entering the low-voltage operation mode, obtain the rated evaporation temperature of the dehumidifier under normal voltage conditions using the current ambient temperature and relative humidity. This rated evaporation temperature is obtained through testing by technicians or theoretical calculation. Calculate the minimum allowable evaporation temperature under low voltage conditions using the voltage, the current ambient dew point temperature, and the rated evaporation temperature. Depending on the temperature point, the following situations apply; When T2 < T2', the evaporator temperature is increased to the acceptable range and the compressor load is reduced by adjusting the opening of the electronic expansion valve and the frequency of the compressor.

[0118] When T2≥T2' and T2>Td-c, the evaporation temperature is insufficient to cool the air and produce condensate. In this case, it is necessary to adjust the opening of the electronic expansion valve and the frequency of the compressor to ensure that the air conditioner can dehumidify normally.

[0119] When Td-c≥T2≥T2', the dehumidifier has a certain dehumidification capacity and the compressor load is within a reasonable range, maintaining the current compressor operating status.

[0120] Specifically, Figure 16 The overall process includes the following steps: When the dehumidifier is turned on, the compressor frequency, fan speed, and electronic expansion valve opening operate according to preset values. Detect the current input voltage U of the entire machine C At the same time, it is consistent with the rated voltage U specified by the whole machine. R Compare; If UC > UR If b, it is determined that the whole machine is in high voltage operation mode. After running for time t, it returns to re-detect the current input voltage U of the whole machine. C At the same time, it is consistent with the rated voltage U specified by the whole machine. R Compare; where b is a coefficient greater than 1; If UR a<UC<UR If b, then the current overall voltage is within the range that allows the machine to operate normally, and the machine operates in normal mode. After running for time t, it returns to re-detect the current overall input voltage U. C At the same time, it is consistent with the rated voltage U specified by the whole machine. R Comparison; where a is a coefficient less than 1; If UC < UR If 'a' is selected, the dehumidifier is determined to be in low-voltage operation mode. The current evaporator mid-section temperature T2, dehumidifier evaporator inlet dry-bulb temperature T1, and relative humidity RH are read, and the dew point temperature Td of the current air environment is calculated. And compare T2 with T2'; If T2 < T2', then determine if the electronic expansion valve opening is at its maximum. If it is, then the compressor frequency needs to be reduced. FR increases the evaporation temperature. After running for time t, the current input voltage U of the entire machine is re-detected. C At the same time, it is consistent with the rated voltage U specified by the whole machine. R Compare; if the electronic expansion valve opening is not at its maximum, then increase the electronic expansion valve opening. K, after running for time t, returns to re-detect the current overall input voltage U. C At the same time, it is consistent with the rated voltage U specified by the whole machine. R In comparison, the goal is to increase the evaporation temperature while minimizing any loss in dehumidification capacity. If T2≥T2', then determine the size of T2 and Td-c; If T2 > Td - c, where c is the preset difference mentioned above, then the evaporator temperature is close to the dew point temperature. The dehumidifier is running, but with almost no dehumidification. Further checks are made to determine if the electronic expansion valve opening is at its minimum. If the electronic expansion valve opening is already at its minimum, the compressor frequency is increased to lower the evaporator temperature, ensuring the machine can dehumidify. After running for time t, the current overall input voltage U is re-detected. C At the same time, it is consistent with the rated voltage U specified by the whole machine. R Compare; if the electronic expansion valve opening is not at its minimum, then reduce the electronic expansion valve opening. K, lower the evaporation temperature to ensure the machine can dehumidify. After running for t time, return to re-detect the current input voltage U of the entire machine. C At the same time, it is consistent with the rated voltage U specified by the whole machine. R Compare; If T2 ≤ Td - c, then the current evaporation temperature is within a reasonable range, ensuring sufficient dehumidification while preventing excessive compressor load. After running for time t, the system will return to re-detect the current overall input voltage U. C At the same time, it is consistent with the rated voltage U specified by the whole machine. R Compare.

[0121] Based on the above-described control method for air conditioners, the following are various embodiments of the controller, air conditioner, and computer-readable storage medium of the present invention.

[0122] In addition, one embodiment of the present invention provides a controller, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor.

[0123] The processor and memory can be connected via a bus or other means.

[0124] It should be noted that the controller in this embodiment may include, for example: Figure 1 The processor and memory in the illustrated embodiment belong to the same inventive concept, and therefore have the same implementation principle and beneficial effects, which will not be described in detail here.

[0125] The non-transient software program and instructions required to implement the air conditioner control method of the above embodiments are stored in the memory. When executed by the processor, the air conditioner control method of the above embodiments is executed.

[0126] According to the technical solution of the present invention, during the dehumidification process of the air conditioner, if the current input voltage is less than a first preset voltage, it indicates that the air conditioner is operating under low voltage. Since long-term operation of the air conditioner under low voltage will cause the compressor to overheat and shut down, the present invention compares the current evaporation temperature of the evaporator with the target evaporation temperature, and then determines whether the compressor is operating under high load based on the comparison result, and then controls the operating state of the air conditioner accordingly. Specifically, if the current evaporation temperature is higher than or equal to the target evaporation temperature, it indicates that although the compressor is currently operating under low voltage, it is not operating under high load, so the air conditioner of the present invention can maintain its current operating state; if the current evaporation temperature is lower than the target evaporation temperature, it indicates that the compressor is currently operating under low voltage and under high load, so the present invention will respond by executing corresponding operations to reduce the compressor's load, thereby reducing the occurrence of compressor overheating and shutting down under low voltage, enabling the air conditioner to operate normally and improving the user experience.

[0127] It is worth noting that since the controller of this embodiment can execute the air conditioner control method of the above embodiments, the specific implementation method and technical effects of the controller of this embodiment can refer to the specific implementation method and technical effects of the air conditioner control method of any of the above embodiments.

[0128] Furthermore, one embodiment of the present invention also provides an air conditioner that includes the aforementioned controller.

[0129] According to the technical solution of the present invention, during the dehumidification process of the air conditioner, if the current input voltage is less than a first preset voltage, it indicates that the air conditioner is operating under low voltage. Since long-term operation of the air conditioner under low voltage will cause the compressor to overheat and shut down, the present invention compares the current evaporation temperature of the evaporator with the target evaporation temperature, and then determines whether the compressor is operating under high load based on the comparison result, and then controls the operating state of the air conditioner accordingly. Specifically, if the current evaporation temperature is higher than or equal to the target evaporation temperature, it indicates that although the compressor is currently operating under low voltage, it is not operating under high load, so the air conditioner of the present invention can maintain its current operating state; if the current evaporation temperature is lower than the target evaporation temperature, it indicates that the compressor is currently operating under low voltage and under high load, so the present invention will respond by executing corresponding operations to reduce the compressor's load, thereby reducing the occurrence of compressor overheating and shutting down under low voltage, enabling the air conditioner to operate normally and improving the user experience.

[0130] It is worth noting that, since the air conditioner of this embodiment has the controller of the above embodiment, and the controller of the above embodiment can execute the control method of the air conditioner of the above embodiment, the specific implementation method and technical effect of the air conditioner of this embodiment can refer to the specific implementation method and technical effect of the control method of the air conditioner of any of the above embodiments.

[0131] Furthermore, one embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions for performing the aforementioned air conditioner control method. Exemplarily, the above-described method is executed... Figures 3 to 16 The methods and steps in the text.

[0132] According to the technical solution of the present invention, during the dehumidification process of the air conditioner, if the current input voltage is less than a first preset voltage, it indicates that the air conditioner is operating under low voltage. Since long-term operation of the air conditioner under low voltage will cause the compressor to overheat and shut down, the present invention compares the current evaporation temperature of the evaporator with the target evaporation temperature, and then determines whether the compressor is operating under high load based on the comparison result, and then controls the operating state of the air conditioner accordingly. Specifically, if the current evaporation temperature is higher than or equal to the target evaporation temperature, it indicates that although the compressor is currently operating under low voltage, it is not operating under high load, so the air conditioner of the present invention can maintain its current operating state; if the current evaporation temperature is lower than the target evaporation temperature, it indicates that the compressor is currently operating under low voltage and under high load, so the present invention will respond by executing corresponding operations to reduce the compressor's load, thereby reducing the occurrence of compressor overheating and shutting down under low voltage, enabling the air conditioner to operate normally and improving the user experience.

[0133] It is worth noting that, since the computer-readable storage medium of the present invention can implement the air conditioner control method of the above embodiments, the specific implementation and technical effects of the computer-readable storage medium of the present invention can be referred to the specific implementation and technical effects of the air conditioner control method of any of the above embodiments.

[0134] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0135] The above provides a detailed description of the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, include: In dehumidification mode, obtain the current input voltage, the current evaporation temperature of the evaporator, and the target evaporation temperature; When the current input voltage is less than the first preset voltage, the operating state of the air conditioner is controlled according to the current evaporation temperature and the target evaporation temperature. The air conditioner includes a throttling device, and controlling the operating state of the air conditioner based on the current evaporation temperature and the target evaporation temperature includes at least one of the following: If the current evaporation temperature is lower than the target evaporation temperature, increase the opening of the throttling device and / or reduce the operating frequency of the compressor; When the current evaporation temperature is greater than or equal to the target evaporation temperature and the current evaporation temperature is greater than the preset temperature, the opening of the throttling device is reduced and / or the operating frequency of the compressor is increased, wherein the preset temperature is lower than the dew point temperature and the temperature difference between the preset temperature and the dew point temperature is less than a preset difference value, and the dew point temperature is determined by the indoor air temperature and the indoor air humidity; If the current evaporation temperature is greater than or equal to the target evaporation temperature and the current evaporation temperature is less than or equal to the preset temperature, the current operating state of the air conditioner shall be maintained. In addition, the target evaporation temperature is obtained through the following steps: The indoor air temperature, indoor air humidity, rated voltage, and rated evaporation temperature of the evaporator are obtained. Determine the dew point temperature based on the indoor air temperature and the indoor air humidity; Calculate a first difference between the rated voltage and the first preset voltage, a second difference between the rated voltage and the current input voltage, and a third difference between the dew point temperature and the rated evaporation temperature; wherein the first preset voltage is less than the rated voltage, and the first preset voltage is calculated from the rated voltage; The target evaporation temperature is calculated based on the dew point temperature, the first difference, the second difference, and the third difference.

2. The control method according to claim 1, characterized in that, Includes at least one of the following: When increasing the opening degree of the throttling device, increasing the opening degree of the throttling device includes: obtaining the current opening degree and the upper limit value of the opening degree of the throttling device; when the current opening degree is less than the upper limit value of the opening degree, determining a first target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature and the current opening degree; when the first target opening degree is less than or equal to the upper limit value of the opening degree, increasing the throttling device from the current opening degree to the first target opening degree; When reducing the operating frequency of the compressor, the reduction of the operating frequency of the compressor includes: obtaining the current opening degree and the upper limit value of the opening degree of the throttling device; when the current opening degree is equal to the upper limit value of the opening degree, determining the first target operating frequency of the compressor based on the current evaporation temperature and the target evaporation temperature, and reducing the operating frequency of the compressor to the first target operating frequency. When increasing the opening degree of the throttling device and reducing the operating frequency of the compressor, the steps of increasing the opening degree of the throttling device and reducing the operating frequency of the compressor include: obtaining the current opening degree and the upper limit value of the opening degree of the throttling device; when the current opening degree is less than the upper limit value, determining a first target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature, and the current opening degree; when the first target opening degree is greater than the upper limit value, increasing the opening degree of the throttling device to the upper limit value and determining a second target operating frequency of the compressor, and reducing the operating frequency of the compressor to the second target operating frequency.

3. The control method according to claim 1, characterized in that, Includes at least one of the following: When reducing the opening degree of the throttling device, the reduction of the opening degree of the throttling device includes: obtaining the current opening degree and the lower limit value of the opening degree of the throttling device; when the current opening degree is greater than the lower limit value of the opening degree, determining the second target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature and the current opening degree; when the second target opening degree is greater than or equal to the lower limit value of the opening degree, reducing the throttling device from the current opening degree to the second target opening degree; In the case of increasing the operating frequency of the compressor, the method of increasing the operating frequency of the compressor includes: obtaining the current opening degree and the lower limit value of the opening degree of the throttling device; when the current opening degree is equal to the lower limit value of the opening degree, determining the third target operating frequency of the compressor based on the current evaporation temperature and the target evaporation temperature, and increasing the operating frequency of the compressor to the third target operating frequency. When reducing the opening degree of the throttling device and increasing the operating frequency of the compressor, the reduction of the opening degree of the throttling device and the increase of the operating frequency of the compressor include: obtaining the current opening degree and the lower limit value of the opening degree of the throttling device; when the current opening degree is greater than the lower limit value of the opening degree, determining a second target opening degree of the throttling device based on the current evaporation temperature, the target evaporation temperature, and the current opening degree; when the second target opening degree is less than the lower limit value of the opening degree, reducing the opening degree of the throttling device to the lower limit value of the opening degree and determining a fourth target operating frequency of the compressor, and increasing the operating frequency of the compressor to the fourth target operating frequency.

4. A controller, characterized in that, include: The device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the control method for an air conditioner as described in any one of claims 1 to 3.

5. An air conditioner, characterized in that: Includes the controller as described in claim 4.

6. A computer-readable storage medium, characterized in that: The device stores computer-executable instructions for performing the control method of the air conditioner as described in any one of claims 1 to 3.

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