Air conditioner, control method thereof, and computer readable storage medium

Abstract

The application discloses a control method of an air conditioner, and relates to an air conditioner provided with a heating device at the bottom plate of an outdoor unit, and the method comprises the following steps: acquiring the outdoor environment temperature and the outdoor heat exchanger temperature when the air conditioner is in a heating operation; and when the outdoor environment temperature and the outdoor heat exchanger temperature reach preset conditions of the risk of frost formation on the outdoor unit, the heating device is controlled to be turned on. The application also discloses an air conditioner and a computer readable storage medium. The application aims to improve the timeliness of the heating device at the bottom plate of the outdoor unit, prevent the air conditioner from frosting when operating in a high-humidity environment, and improve the heating effect of the air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to a control method for an air conditioner, an air conditioner, and a computer-readable storage medium. Background Technology

[0002] With the development of economy and technology, air conditioners are becoming increasingly widely used, and their performance is constantly being optimized. Most air conditioners have a heating device installed in the outdoor unit chassis. When the outdoor ambient temperature is below a certain threshold, indicating a risk of frost formation on the outdoor unit, the heating device is activated. However, this method of solely relying on outdoor ambient temperature to determine the frost risk and activate the chassis heating device ignores the impact of high humidity on frost formation during heating operation. This can easily lead to the heating device failing to activate promptly after frost forms on the outdoor unit, thus affecting the air conditioner's heating efficiency. Summary of the Invention

[0003] The main objective of this invention is to provide a control method for an air conditioner, an air conditioner, and a computer-readable storage medium, which aims to improve the timeliness of the outdoor unit chassis heating device activation, prevent frost formation during air conditioner heating operation in high humidity environments, and thus improve the heating effect of the air conditioner.

[0004] To achieve the above objectives, the present invention provides a control method for an air conditioner, wherein the outdoor unit chassis of the air conditioner is equipped with a heating device, and the control method for the air conditioner includes the following steps:

[0005] When the air conditioner is in heating mode, the outdoor ambient temperature and the outdoor heat exchanger temperature are obtained.

[0006] When the outdoor ambient temperature and the outdoor heat exchanger temperature reach a preset condition that poses a risk of frost formation on the outdoor unit, the heating device is controlled to turn on.

[0007] Optionally, after the step of obtaining the outdoor ambient temperature and the outdoor heat exchanger temperature when the air conditioner is in heating mode, the method further includes:

[0008] When the outdoor heat exchanger temperature is lower than the first preset temperature for a first preset duration and the outdoor ambient temperature is higher than the preset ambient temperature, it is determined that the outdoor ambient temperature and the outdoor heat exchanger temperature have reached the preset conditions.

[0009] Optionally, after the step of controlling the heating device to turn on, the method further includes:

[0010] When a defrost signal is detected, the air conditioner is controlled to defrost.

[0011] When the air conditioner finishes defrosting, the compressor of the air conditioner is controlled to operate at a first target frequency, which is lower than the compressor operating frequency during the heating phase before the defrosting operation.

[0012] Optionally, after the step of obtaining the outdoor ambient temperature and the outdoor heat exchanger temperature when the air conditioner is in heating mode, the method further includes:

[0013] When the outdoor heat exchanger temperature is lower than the second preset temperature for a second preset duration, and the outdoor ambient temperature is lower than or equal to the preset ambient temperature, it is determined that the outdoor ambient temperature and the outdoor heat exchanger temperature have reached the preset conditions.

[0014] The second preset temperature is lower than the first preset temperature.

[0015] Optionally, the control method for the air conditioner further includes:

[0016] The second preset temperature is determined based on the outdoor ambient temperature, and the second preset temperature is lower than the outdoor ambient temperature.

[0017] Optionally, after the step of controlling the heating device to turn on, the method further includes:

[0018] During the operation of the heating device, when a defrosting signal is received, the air conditioner is controlled to defrost and the heating device is controlled to remain on.

[0019] When the air conditioner finishes defrosting, the heating device is turned off.

[0020] Optionally, the step of obtaining the outdoor ambient temperature and the outdoor heat exchanger temperature while the air conditioner is in heating mode may include, at the same time or after, the following:

[0021] The compressor of the air conditioner is controlled to operate at a second target frequency during the initial stage of heating operation, the second target frequency being determined based on the outdoor ambient temperature.

[0022] Optionally, after the step of obtaining the outdoor ambient temperature and the outdoor heat exchanger temperature when the air conditioner is in heating mode, the method further includes:

[0023] When the outdoor heat exchanger temperature reaches the target condition, the compressor of the air conditioner is controlled to operate at a higher frequency.

[0024] When the outdoor heat exchanger temperature does not reach the target condition, the step of controlling the heating device to turn on is executed when the outdoor ambient temperature and the outdoor heat exchanger temperature reach the preset condition that there is a risk of frost formation on the outdoor unit.

[0025] The target condition is that the temperature of the outdoor heat exchanger is greater than a third preset temperature and remains above a third preset duration.

[0026] In addition, to achieve the above objectives, this application also proposes a control device for an air conditioner, the control device comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program, when executed by the processor, implements the steps of the air conditioner control method as described in any of the preceding claims.

[0027] Furthermore, in order to achieve the above objectives, this application also proposes an air conditioner, the air conditioner comprising:

[0028] A heating device, wherein the heating device is located on the chassis of the outdoor unit;

[0029] A control device, wherein the heating device is connected to the control device, the control device comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program, when executed by the processor, implements the steps of the air conditioner control method as described in any of the preceding claims.

[0030] In addition, to achieve the above objectives, this application also proposes a computer-readable storage medium storing a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for the air conditioner as described in any of the preceding claims.

[0031] This invention proposes a control method for an air conditioner. This method combines the outdoor ambient temperature and the outdoor heat exchanger temperature during the air conditioner's heating operation as the basis for determining the risk of frost formation on the outdoor unit, rather than solely relying on the outdoor ambient temperature. This ensures that even when the air conditioner is operating in a high-humidity environment, the risk of frost formation on the outdoor unit can be accurately identified by combining the outdoor ambient temperature and the outdoor heat exchanger temperature. Consequently, when a frost formation risk is detected, the outdoor unit's chassis heating device is activated promptly, effectively improving the timeliness of the outdoor unit's chassis heating device activation and preventing frost formation during heating operation in high-humidity environments, thereby improving the air conditioner's heating performance. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the air conditioner of the present invention;

[0033] Figure 2 This is a flowchart illustrating an embodiment of the control method for an air conditioner according to the present invention;

[0034] Figure 3 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0035] Figure 4 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0036] Figure 5 This is a flowchart illustrating another embodiment of the control method for the air conditioner of the present invention.

[0037] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0039] The main solution of this invention is: based on an air conditioner with a heating device on the outdoor unit chassis, when the air conditioner is in heating mode, the outdoor ambient temperature and the outdoor heat exchanger temperature are obtained; when the outdoor ambient temperature and the outdoor heat exchanger temperature reach a preset condition that indicates a risk of frost formation on the outdoor unit, the heating device is controlled to turn on.

[0040] Because the existing technology uses the outdoor ambient temperature as the sole criterion for judging the risk of frost formation and turns on the chassis heating device, it ignores the impact of high humidity on the outdoor unit's frost formation during heating operation. This can easily lead to the heating device failing to turn on in time after the outdoor unit frosts up, thus affecting the heating effect of the air conditioner.

[0041] The present invention provides the above-mentioned solution, which aims to improve the timeliness of the outdoor unit chassis heating device to prevent the air conditioner from frosting during heating operation in a high humidity environment, thereby improving the heating effect of the air conditioner.

[0042] This invention provides an air conditioner.

[0043] In this embodiment of the invention, the air conditioner includes a heating device 1 and a control device 2 connected to the heating device 1. The control device 2 can be used to control the operation of the heating device 1. The heating device 1 is specifically located on the outdoor unit chassis of the air conditioner. In this embodiment, the heating device 1 is an electric heating element. In other embodiments, the heating device 1 may also have a heat storage element with heat output regulation function.

[0044] Furthermore, refer to Figure 1The air conditioner also includes an environmental detection module 3 and a temperature sensor 4. Both the environmental detection module 3 and the temperature sensor 4 are connected to a control device 2, which can acquire data detected by the environmental detection module 3 and the temperature sensor 4. The environmental detection module 3 is specifically used to detect the outdoor ambient temperature. The environmental detection module 3 is specifically located on the outer casing of the outdoor unit. The temperature sensor 4 is specifically used to detect the temperature of the outdoor heat exchanger. In this embodiment, the temperature sensor 4 is specifically located at the refrigerant outlet of the outdoor heat exchanger to detect the refrigerant outlet temperature of the outdoor heat exchanger. In other embodiments, the temperature sensor 4 may also be located in the middle of the coil and / or the coil inlet of the outdoor heat exchanger to detect the middle condensing temperature and / or the refrigerant inlet temperature of the outdoor heat exchanger.

[0045] Furthermore, refer to Figure 1 The air conditioner's control device 2 is also connected to the compressor 5 in the air conditioner, and the control device 2 can be used to control the operation of the compressor 5. The air conditioner's control device 2 is also connected to the four-way valve 6 in the air conditioner, and the control device 2 can be used to control the valve position switching of the four-way valve 6 to switch the air conditioner's operating mode, such as switching between heating operation mode and defrosting operation mode.

[0046] In this embodiment of the invention, reference is made to Figure 1 The control device 2 of the air conditioner includes a processor 1001 (e.g., CPU), a memory 1002, etc. The processor 1001 and the memory 1002 are connected via a communication bus. The memory 1002 can be a high-speed RAM or a stable memory (non-volatile memory), such as a disk storage device. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0047] Those skilled in the art will understand that Figure 1 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0048] like Figure 1 As shown, the memory 1002, which is a computer-readable storage medium, may include a control program for an air conditioner. Figure 1 In the device shown, the processor 1001 can be used to call the control program of the air conditioner stored in the memory 1002 and execute the relevant steps of the control method of the air conditioner in the following embodiments.

[0049] This invention also provides a control method for an air conditioner, applied to the aforementioned air conditioner.

[0050] Reference Figure 2This application proposes an embodiment of a control method for an air conditioner. In this embodiment, the control method for the air conditioner includes:

[0051] Step S10: When the air conditioner is in heating mode, obtain the outdoor ambient temperature and the outdoor heat exchanger temperature.

[0052] When the air conditioner is in heating mode, the refrigerant flowing out of the compressor passes through the outdoor heat exchanger, four-way valve, throttling device and indoor heat exchanger in sequence before flowing back to the compressor. At this time, the indoor heat exchanger is in a condensing state and releasing heat, while the outdoor heat exchanger is in an evaporating state and absorbing heat.

[0053] Specifically, the system can continuously acquire data from the environmental monitoring module located in the outdoor environment at set intervals to obtain the outdoor ambient temperature, and it can also continuously acquire data from the temperature sensor installed on the outdoor heat exchanger at set intervals to obtain the outdoor heat exchanger temperature.

[0054] Step S20: When the outdoor ambient temperature and the outdoor heat exchanger temperature reach the preset conditions that indicate a risk of frost formation on the outdoor unit, the heating device is turned on.

[0055] The preset conditions are the range and / or quantitative relationship of the outdoor ambient temperature and outdoor heat exchanger temperature that need to be reached when there is a risk of frost formation on the outdoor unit.

[0056] Specifically, the preset conditions may include a first temperature range and a second temperature range that the outdoor ambient temperature and the outdoor heat exchanger temperature must reach respectively when there is a risk of frost formation on the outdoor unit. When the outdoor ambient temperature is in the first temperature range and the outdoor heat exchanger temperature is in the second temperature range, the preset conditions are met, and the outdoor unit is considered to have a risk of frost formation. Otherwise, the preset conditions are not met, and the outdoor unit is considered not to have a risk of frost formation.

[0057] In addition, the preset conditions may also include the parameter range that the characterization parameters of the frost risk calculated by the outdoor ambient temperature and the outdoor heat exchanger temperature need to reach when there is a risk of frost on the outdoor unit. When the characterization parameters are within the parameter range, it can be determined that the preset conditions have been met, and at this time it is considered that there is a risk of frost on the outdoor unit. When the characterization parameters are outside the parameter range, it can be determined that the preset conditions have not been met, and at this time it is considered that there is no risk of frost on the outdoor unit.

[0058] Specifically, controlling the heating device to turn on includes switching the heating device from a closed state to an open state or controlling the heating device to remain in an open state.

[0059] When the outdoor unit is determined to be at risk of frosting based on the outdoor ambient temperature and the outdoor heat exchanger temperature, the heating device is turned on; when the outdoor unit is determined to be at no risk of frosting based on the outdoor ambient temperature and the outdoor heat exchanger temperature, the heating device is turned off.

[0060] This invention proposes a control method for an air conditioner. During the air conditioner's heating operation, this method combines the outdoor ambient temperature and the outdoor heat exchanger temperature as the basis for determining the risk of frost formation on the outdoor unit, rather than solely relying on the outdoor ambient temperature. This ensures that even when the air conditioner is operating in a high-humidity environment, the risk of frost formation on the outdoor unit can be accurately identified by combining the outdoor ambient temperature and the outdoor heat exchanger temperature. Consequently, when a frost formation risk is detected, the outdoor unit's chassis heating device is activated promptly, effectively improving the timeliness of the outdoor unit's chassis heating device activation and preventing frost formation during heating operation in high-humidity environments, thereby improving the air conditioner's heating performance.

[0061] Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, reference is made to... Figure 3 After step S10, the method further includes:

[0062] Step S11: When the outdoor heat exchanger temperature is lower than the first preset temperature for a first preset duration and the outdoor ambient temperature is higher than the preset ambient temperature, it is determined that the outdoor ambient temperature and the outdoor heat exchanger temperature have reached the preset conditions.

[0063] The first preset duration can be a fixed parameter set in advance, or it can be a parameter determined according to the current operating frequency of the air conditioner.

[0064] Specifically, the outdoor heat exchanger temperature can be continuously detected at set intervals within a first preset time period to obtain multiple outdoor heat exchanger temperatures. When multiple outdoor heat exchanger temperatures are all lower than the first preset temperature, it can be considered that the outdoor heat exchanger temperature is lower than the first preset temperature and continues for a first preset time.

[0065] The first preset temperature is specifically the minimum temperature value that the outdoor heat exchanger is allowed to withstand without frosting risk when the outdoor ambient temperature is higher than the preset ambient temperature. If the outdoor ambient temperature is higher than the preset ambient temperature but the outdoor heat exchanger temperature is lower than the first preset temperature, it indicates that the outdoor unit faces a risk of frosting due to high humidity during heating. In this case, activating the heating device effectively prevents frosting in high-humidity heating environments, thus improving the air conditioner's heating performance. Furthermore, humidity detection is not required during this process, allowing for accurate identification of frosting risks during high-humidity heating operation and timely activation of the heating device.

[0066] In other embodiments, when the temperature of the outdoor heat exchanger is less than the first preset temperature and the outdoor ambient temperature is greater than the preset ambient temperature, it is determined that the temperatures of the outdoor heat exchanger and the outdoor ambient temperature reach the preset conditions. At this time, it can be considered that there is a risk of frosting when the air conditioner heats in a high-humidity environment. Alternatively, an ambient temperature threshold can also be determined according to the temperature of the outdoor heat exchanger. Different outdoor heat exchanger temperatures correspond to different ambient temperature thresholds, and the outdoor heat exchanger temperature and the ambient temperature threshold can be negatively correlated. Based on this, when the outdoor ambient temperature is less than the ambient temperature threshold, it can be considered that there is a risk of frosting when the air conditioner heats in a high-humidity environment, and it can be determined that the temperatures of the outdoor heat exchanger and the outdoor ambient temperature reach the preset conditions.

[0067] Further, in this embodiment, referring to Figure 3 , after step S20, the following is further included:

[0068] Step S30, when a defrosting signal is detected, control the air conditioner to perform defrosting operation;

[0069] The defrosting signal can be input by the user or can be generated when the air conditioner monitors that the operation of the air conditioner reaches the frosting condition.

[0070] When the air conditioner performs defrosting operation, the air conditioner switches from heating operation to cooling operation, and the outdoor heat exchanger switches from the evaporation state to the condensation state to release heat, and the released heat melts the ice on the outdoor unit.

[0071] Step S40, when the air conditioner finishes the defrosting operation, control the compressor of the air conditioner to perform heating operation at the first target frequency, and the first target frequency is less than the compressor operation frequency in the heating stage before the defrosting operation of the air conditioner.

[0072] Specifically, during the heating operation of the air conditioner before step S30, the compressor operation frequency is defined as F1, and the first target frequency is F2, then F2 < F1. Specifically, the result obtained by reducing F1 according to the preset adjustment parameter can be used as F2. For example, F2 = F1 * x (0 < x < 1), or F2 = F1 - p (p > 0).

[0073] When the outdoor unit operates in a high-humidity environment for heating, excessively high compressor frequency can lead to a prolonged frosting cycle, making it difficult for frost to melt completely. Therefore, in this embodiment, when the outdoor heat exchanger temperature is lower than a first preset temperature for a first preset duration and the outdoor ambient temperature is higher than a preset ambient temperature, the risk of frosting due to high humidity heating can be considered. Based on this, the air conditioner enters defrosting mode, and after defrosting, the compressor operating frequency is reduced before entering the next heating cycle. This helps reduce the cooling output of the outdoor heat exchanger, extending the time between the next heating cycle and the next defrosting cycle, or preventing frost formation on the outdoor unit. This prevents thick frost buildup due to a long frosting cycle under high-humidity heating conditions, effectively improving the air conditioner's heating performance.

[0074] Furthermore, based on any of the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, reference is made to... Figure 4 After step S10, the method further includes:

[0075] Step S12: When the outdoor heat exchanger temperature is lower than the second preset temperature for a second preset duration and the outdoor ambient temperature is lower than or equal to the preset ambient temperature, it is determined that the outdoor ambient temperature and the outdoor heat exchanger temperature have reached the preset conditions; wherein, the second preset temperature is lower than the first preset temperature.

[0076] In this embodiment, the second preset temperature is determined based on the outdoor ambient temperature, and the second preset temperature is less than the outdoor ambient temperature. Specifically, the outdoor ambient temperature is defined as T4, and the second preset temperature is defined as Tk, then Tk = T4 - a, where a is a preset value. Determining the second preset temperature based on the outdoor ambient temperature allows for accurate identification of the risk of frost formation on the outdoor unit under current operating conditions. In other embodiments, the second preset duration can be a pre-set fixed parameter or a parameter obtained based on the current operating frequency of the air conditioner. The second preset duration can be less than or equal to the first preset duration.

[0077] When the outdoor ambient temperature is less than or equal to the preset ambient temperature, the air conditioner is not in high humidity heating operation mode. The outdoor ambient temperature is extremely low, and the cooling capacity of the outdoor heat exchanger can be dissipated into the environment. At this time, the outdoor unit is judged to be frosted by comparing the outdoor heat exchanger temperature with the second preset temperature, which is lower than the first preset temperature. Specifically, the outdoor heat exchanger temperature is judged to be at risk of frosting and the heating device is activated only when the outdoor unit temperature continues to drop and remains below the second preset temperature for a second preset time. Based on this, the risk of frosting of the outdoor heat exchanger can be accurately identified under different operating conditions, thereby further improving the accuracy of heating device control, effectively preventing outdoor unit frosting, and improving the heating effect of the air conditioner.

[0078] Furthermore, during the process of the air conditioner operating in heating mode at the first target frequency, the process can return to the execution of step S10 described above.

[0079] Furthermore, in this embodiment, after step S20, when a defrost signal is detected, the air conditioner is controlled to defrost; after the air conditioner finishes defrosting, it is controlled to operate in heating mode at a third target frequency, where the third target frequency is the compressor operating frequency during the heating phase before defrosting. In other words, the air conditioner maintains its original frequency to enter the next heating cycle when not operating in a high-humidity environment, thereby ensuring that the frost layer does not become excessively thick due to high humidity while maintaining the heating effect of the air conditioner under the current operating conditions.

[0080] Furthermore, based on any of the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, reference is made to... Figure 5 After step S20, the method further includes:

[0081] Step S50: During the process of turning on the heating device, when a defrosting signal is received, control the air conditioner to defrost and control the heating device to remain on.

[0082] Step S60: When the air conditioner finishes defrosting, control the heating device to turn off.

[0083] Specifically, when the heating device is turned on when the outdoor heat exchanger temperature is lower than a first preset temperature for a first preset duration and the outdoor ambient temperature is higher than a preset ambient temperature, the air conditioner is controlled to operate at the aforementioned first target frequency after the heating device is turned off. When the heating device is turned on when the outdoor heat exchanger temperature is lower than a second preset temperature for a second preset duration and the outdoor ambient temperature is lower than or equal to the preset ambient temperature, the air conditioner is controlled to operate at the aforementioned third target frequency after the heating device is turned off.

[0084] In this embodiment, the heating device is activated after the risk of frost is detected and then turned off after defrosting is completed. The heating device is no longer turned on for a fixed duration, but the activation duration can be adjusted according to the actual heat required by the outdoor unit. This avoids the heating device being turned on for too long or too short a duration, thereby ensuring that the heat output of the heating device can effectively prevent frost formation on the outdoor unit while saving energy.

[0085] Furthermore, based on any of the above embodiments, step S10 may be performed simultaneously or afterward by: controlling the air conditioner's compressor to operate at a second target frequency during the initial stage of heating operation, the second target frequency being determined based on the outdoor ambient temperature. Different outdoor ambient temperatures correspond to different second target frequencies; the lower the outdoor ambient temperature, the lower the compressor's second target frequency. This ensures that the air conditioner's heating operation matches the current actual operating conditions, guaranteeing reliable operation of the air conditioner in low-temperature heating environments.

[0086] It should be noted that the second target frequency here refers to the initial frequency of the air conditioner's heating operation. When the air conditioner starts defrosting under high humidity heating conditions (i.e., when the outdoor heat exchanger temperature is lower than the first preset temperature for a first preset duration and the outdoor ambient temperature is higher than the preset ambient temperature), if it is the first defrosting stage after the air conditioner starts heating, and the compressor operating frequency during the heating stage before the defrosting operation is the second target frequency, the compressor frequency can be adjusted from the second target frequency to the first target frequency, and the compressor returns to the steps of obtaining the outdoor ambient temperature and the outdoor heat exchanger temperature during the operation of the compressor according to the first target frequency; if it is not the first defrosting stage after the air conditioner starts heating, the compressor operating frequency during the heating stage before the defrosting operation is the frequency after reducing the second target frequency one or more times. In addition, when the air conditioner starts defrosting under non-high humidity heating conditions (i.e., when the outdoor heat exchanger temperature is lower than the second preset temperature for a second preset duration and the outdoor ambient temperature is lower than or equal to the preset ambient temperature), after defrosting ends and the next heating cycle begins, the compressor can maintain the second target frequency and return to the steps of obtaining the outdoor ambient temperature and the outdoor heat exchanger temperature.

[0087] Furthermore, based on any of the above embodiments, after step S10, the method further includes: when the outdoor heat exchanger temperature reaches the target condition, controlling the compressor of the air conditioner to operate at a higher frequency; when the outdoor heat exchanger temperature does not reach the target condition, executing the step of controlling the heating device to turn on when the outdoor ambient temperature and the outdoor heat exchanger temperature reach the preset condition that there is a risk of frost formation on the outdoor unit; the target condition is that the outdoor heat exchanger temperature is greater than a third preset temperature and lasts for a third preset duration.

[0088] The third preset temperature is greater than the second preset temperature mentioned above, and the third preset temperature is greater than the first preset temperature mentioned above.

[0089] The third preset temperature is specifically the freezing temperature. In this embodiment, the third preset temperature is 0 degrees Celsius. In other embodiments, depending on the geographical environment where the air conditioner is located, the third preset temperature can also be set to a higher or lower temperature, such as 1 degree Celsius, -1 degree Celsius, etc.

[0090] Here, when the outdoor heat exchanger temperature remains high, it can be assumed that there is no risk of frosting on the outdoor unit. In this case, the air conditioner's operating frequency can be increased. For example, if the air conditioner is currently operating at the first target frequency, it can be controlled to operate at an increased frequency based on the first target frequency; similarly, if the air conditioner is currently operating at the second target frequency, it can be controlled to operate at an increased frequency based on the second target frequency. This is beneficial for increasing the air conditioner's heating capacity, thereby further improving its heating effect on the indoor environment.

[0091] Furthermore, this invention also proposes a computer-readable storage medium storing a control program for an air conditioner. When the control program is executed by a processor, it implements the relevant steps of any of the above-described air conditioner control methods.

[0092] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0093] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0094] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0095] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The outdoor unit chassis of the air conditioner is equipped with a heating device, and the control method of the air conditioner includes the following steps: When the air conditioner is in heating mode, the outdoor ambient temperature and the outdoor heat exchanger temperature are obtained. When the outdoor ambient temperature and the outdoor heat exchanger temperature reach the preset conditions that pose a risk of frost formation on the outdoor unit, the heating device is controlled to turn on. The heating device is an electric heating element. When a defrost signal is detected, the air conditioner is controlled to defrost. When the air conditioner finishes defrosting, the compressor of the air conditioner is controlled to operate in heating mode at a first target frequency, which is less than the compressor operating frequency during the heating phase before the defrosting operation of the air conditioner. The step of acquiring the outdoor ambient temperature and the outdoor heat exchanger temperature after the air conditioner is in heating mode further includes: When the outdoor heat exchanger temperature is lower than a first preset temperature for a first preset duration and the outdoor ambient temperature is higher than a preset ambient temperature, it is determined that the outdoor ambient temperature and the outdoor heat exchanger temperature have reached the preset conditions. The first preset duration is a parameter determined based on the current operating frequency of the air conditioner. When the outdoor ambient temperature is higher than the preset ambient temperature and the outdoor heat exchanger temperature is lower than the first preset temperature, it indicates that the outdoor unit has a risk of frosting due to heating in a high humidity environment.

2. The control method for an air conditioner as described in claim 1, characterized in that, After the step of obtaining the outdoor ambient temperature and the outdoor heat exchanger temperature when the air conditioner is in heating mode, the method further includes: When the outdoor heat exchanger temperature is lower than the second preset temperature for a second preset duration, and the outdoor ambient temperature is lower than or equal to the preset ambient temperature, it is determined that the outdoor ambient temperature and the outdoor heat exchanger temperature have reached the preset conditions. The second preset temperature is lower than the first preset temperature.

3. The control method for an air conditioner as described in claim 2, characterized in that, The control method for the air conditioner further includes: The second preset temperature is determined based on the outdoor ambient temperature, and the second preset temperature is lower than the outdoor ambient temperature.

4. The control method for an air conditioner as described in any one of claims 1 to 3, characterized in that, After the step of controlling the heating device to turn on, the method further includes: During the operation of the heating device, when a defrosting signal is received, the air conditioner is controlled to defrost and the heating device is controlled to remain on. When the air conditioner finishes defrosting, the heating device is turned off.

5. The control method for an air conditioner as described in any one of claims 1 to 3, characterized in that, The step of obtaining the outdoor ambient temperature and the outdoor heat exchanger temperature during or after the operation of the air conditioner in heating mode also includes: The compressor of the air conditioner is controlled to operate at a second target frequency during the initial stage of heating operation, the second target frequency being determined based on the outdoor ambient temperature.

6. The control method for an air conditioner as described in any one of claims 1 to 3, characterized in that, After the step of obtaining the outdoor ambient temperature and the outdoor heat exchanger temperature when the air conditioner is in heating mode, the method further includes: When the outdoor heat exchanger temperature reaches the target condition, the compressor of the air conditioner is controlled to operate at a higher frequency. When the outdoor heat exchanger temperature does not reach the target condition, the step of controlling the heating device to turn on is executed when the outdoor ambient temperature and the outdoor heat exchanger temperature reach the preset condition that there is a risk of frost formation on the outdoor unit. The target condition is that the temperature of the outdoor heat exchanger is greater than a third preset temperature and remains above a third preset duration.

7. An air conditioner, characterized in that, The air conditioner includes: A heating device, wherein the heating device is located on the chassis of the outdoor unit; A control device, wherein the heating device is connected to the control device, the control device comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program, when executed by the processor, implements the steps of the air conditioner control method as described in any one of claims 1 to 6.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for an air conditioner as described in any one of claims 1 to 6.

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