CN113405230B

CN113405230B - Self-cleaning sterilization control method and device for air conditioner, air conditioner and storage medium

Info

Publication number: CN113405230B
Application number: CN202110710794.0A
Authority: CN
Inventors: 王军; 别清峰; 王宏超
Original assignee: Hisense Shandong Air Conditioning Co Ltd
Current assignee: Hisense Shandong Air Conditioning Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-03-08
Anticipated expiration: 2041-06-25
Also published as: CN113405230A

Abstract

The invention provides a self-cleaning sterilization control method and a self-cleaning sterilization control device for an air conditioner, the air conditioner and a storage medium, wherein the self-cleaning sterilization control method comprises the following steps: after receiving a self-cleaning sterilization instruction, judging whether the current environment meets a preset condition; if so, controlling the air conditioner to enter a self-cleaning mode, controlling the air conditioner to switch to a sterilization mode when the difference value between the temperature value of the outdoor heat exchanger and the temperature value of the outdoor environment is smaller than a preset difference value, controlling the air conditioner to heat in the sterilization mode, controlling the on or off state of the outdoor alternating current motor, the indoor motor, the compressor and the electronic expansion valve to operate at a set rotating speed, a set frequency and a set opening degree, and adjusting one or more of the components according to the temperature value of the indoor heat exchanger after operating for a first preset time. The invention can reduce the total operation time of the self-cleaning sterilization stage and ensure the normal operation of the compressor during the high-temperature sterilization of the air conditioner, thereby improving the operation reliability of the compressor during the high-temperature sterilization and the high-temperature sterilization reliability of the air conditioner.

Description

Self-cleaning sterilization control method and device for air conditioner, air conditioner and storage medium

Technical Field

The invention relates to the technical field of air conditioners, in particular to a self-cleaning sterilization control method and device for an air conditioner, the air conditioner and a storage medium.

Background

Along with the healthy demand of user in to the air conditioner use, the automatically cleaning pasteurization function of air conditioner becomes the key that relevant technical staff paid attention to, the air conditioner is when carrying out automatically cleaning pasteurization, the indoor heat exchanger of earlier control frosts, and the frost is accomplished the back, changes the frost again, and the comdenstion water that its was changed the frost and is produced erodees the dust, realizes the automatically cleaning effect of heat exchanger, and after the automatically cleaning, carries out pasteurization again, and at the pasteurization stage, the indoor heat exchanger of control keeps higher temperature, makes germ and virus inactivation. The self-cleaning stage controls the indoor heat exchanger to frost, the essence is refrigeration, the high-temperature sterilization stage is heating, the indoor heat exchanger and the high-temperature sterilization stage are switched by controlling the four-way valve to change directions, and the switching between the refrigeration mode and the heating mode is realized; the sliding block in the four-way valve is damaged by impact; the four-way valve has obvious impact noise of the refrigerant at the moment of reversing. Therefore, when switching between the cooling and heating modes, the compressor needs to be stopped for a certain time to balance the high pressure and the low pressure and then started, thereby realizing the mode switching. However, when the indoor and outdoor environmental temperature is high, the self-cleaning process time is long, and the duration of the high-temperature sterilization is also long, if the self-cleaning process is finished, the machine is stopped for a certain time, and then the high-temperature sterilization is performed, the total time of the self-cleaning high-temperature sterilization function is long, the invalid waiting time of the user is increased, and the user experience is reduced.

After the self-cleaning stage is finished, the air conditioner is controlled to enter a high-temperature sterilization mode, the high-temperature sterilization function of the air conditioner is to inactivate germs and viruses by utilizing the high temperature of the indoor heat exchanger, therefore, the high-temperature sterilization function is to control the temperature of a coil pipe of the indoor heat exchanger to be maintained above 56 ℃, the essence of high-temperature sterilization is heating, the severe heating working condition specified by the national standard is the maximum operation heating working condition, namely, the atmospheric working condition is called as the atmospheric working condition for short, namely, the indoor dry and wet bulb is 27 ℃ and the outdoor dry and wet bulb is 24 ℃ or 18 ℃. However, in practical applications, users can also use the high-temperature sterilization function of the air conditioner to perform sterilization at higher ambient temperature, such as summer, but in summer, the outdoor temperature generally exceeds 30 ℃, even can reach 40 ℃ or above, and is more severe than the high thermal condition specified by the national standard, at this time, in order to ensure the sterilization effect, the temperature of the heat exchanger coil must be controlled and maintained in a higher sterilization temperature range, so the condensation pressure of the corresponding refrigeration system is high, however, the higher the temperature in summer, the better the heat exchange coefficient is, so that the compressor must operate at a low frequency, such as 10Hz, that is, a heavy load, and a low frequency. When the air conditioner runs under heavy load and low frequency, the problem that the air conditioner drives the compressor to fail easily occurs, and the reliability of the compressor is low. Wherein, the principle that the heavy load low frequency drives the compressor to lose step and shut down does: the output torque of a compressor motor, such as a permanent magnet synchronous motor, is related to the motor speed or frequency, and when the frequency is reduced to a certain value, the output torque is rapidly reduced. When the compressor is at a low frequency, the fluctuation of the rotating speed is obvious due to the influence of the rotational inertia, for example, when the compressor is at 20Hz, the fluctuation range may be 15Hz-30Hz, when the compressor is at 20Hz, the output torque is limited, the torque current may be increased for dragging the load, and when the torque current reaches the upper limit, the drive may be stopped out of step. And, as shown in fig. 1, when the frequency of the compressor is lower than 30Hz, the lower the frequency, the lower the maximum condensing pressure boundary, in order to maintain the coil of the indoor heat exchanger at 56 ℃, the corresponding condensing pressure is at least 3.6 Mpa; the highest sterilization condensation temperature can not exceed the maximum condensation pressure 4.15MPa specified by the compressor, the corresponding condensation temperature is 64 ℃, and different refrigerants have different specified maximum condensation pressure boundaries and corresponding condensation temperatures.

However, the conventional sterilization control method only considers the improvement of the sterilization effect, but does not consider the reliability problem of the compressor during sterilization, and the conventional sterilization control method is easy to trigger the driving step-out fault shutdown when the indoor and outdoor ambient temperatures are high, and is easy to cause the problem of the over-standard pressure of the refrigeration system, thereby reducing the operation reliability of the compressor.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

Therefore, an object of the present invention is to provide a self-cleaning sterilization control method for an air conditioner, which controls an indoor motor to be raised to a second preset rotation speed, a compressor to be operated at a first preset frequency and an electronic expansion valve to be operated at a maximum opening degree, thereby jointly raising an evaporation pressure and lowering a condensation pressure, reducing a pressure of a refrigeration system, realizing a non-stop switching between a self-cleaning mode and a sterilization mode, and reducing a total duration time of a self-cleaning high-temperature sterilization stage, thereby reducing a user invalid waiting time and improving user experience, and when the high-temperature sterilization is performed by switching to the high-temperature sterilization mode, obtaining a temperature value of an indoor heat exchanger, and adjusting one or more of a frequency of the compressor and an on or off state of an outdoor ac motor according to a priority order based on the temperature value of the indoor heat exchanger, and controlling the frequency of the compressor to be at or above a lowest frequency during the high-temperature sterilization, the on-off state of the outdoor alternating current motor is correspondingly controlled, so that the compressor can normally operate in indoor and outdoor high-temperature environments during high-temperature sterilization, the problems that the compressor is driven to stop in a step-out mode due to low-frequency operation and the condensing pressure is too high are solved, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved while the cost is not increased.

Therefore, the second purpose of the invention is to provide a self-cleaning sterilization control device of an air conditioner.

To this end, a third object of the present invention is to provide an air conditioner.

To this end, a fourth object of the invention is to propose a computer-readable storage medium.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides a self-cleaning sterilization control method of an air conditioner, the method including: after receiving a self-cleaning sterilization instruction, judging whether the current environment meets a preset condition, wherein the preset condition comprises the following steps: the indoor environment temperature is greater than or equal to a first temperature threshold, and the outdoor environment temperature is greater than or equal to a second temperature threshold; if so, controlling the air conditioner to enter a self-cleaning mode, wherein in the self-cleaning mode, the air conditioner is controlled to refrigerate, an indoor motor is controlled to stop or operate at a rotating speed lower than a first preset rotating speed so as to quickly frost an indoor heat exchanger, and when a frost-formation exit condition is met, the indoor motor is controlled to be increased to a second preset rotating speed so as to maintain the temperature of the indoor heat exchanger within a preset temperature range, meanwhile, an air deflector is controlled to be in a set position, a compressor is controlled to operate at a first preset frequency and an electronic expansion valve at a maximum opening degree, and the air conditioner is controlled to be switched to a sterilization mode until a difference value between a temperature value of an outdoor heat exchanger and an outdoor environment temperature value is smaller than a preset difference value, wherein in the sterilization mode, the method comprises the following steps: the air conditioner is controlled to heat, the air deflector is kept at the set position, meanwhile, an outdoor alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at a third preset rotating speed and at a preset initial frequency, after the air conditioner runs for a first preset time, a temperature value of an indoor heat exchanger is obtained, one or more of the on or off state of the outdoor alternating current motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, and in the adjusting process, the priority for adjusting the frequency of the compressor is larger than the priority for adjusting the on or off state of the outdoor alternating current motor.

According to the self-cleaning sterilization control method of the air conditioner, when the current environment meets the preset condition, the air conditioner is controlled to enter the self-cleaning mode, under the self-cleaning mode, the indoor motor is controlled to stop or operate at the rotating speed lower than the first preset rotating speed, so that the indoor heat exchanger is frosted quickly, and when the condition of frost formation and quit is met, the indoor motor is controlled to be increased to the second preset rotating speed to operate, so that the temperature value of the indoor heat exchanger is maintained in the preset temperature range, the temperature of the indoor heat exchanger is prevented from being overhigh, so that moisture is evaporated quickly, the indoor cleaning effect is influenced, the compressor is controlled to operate at the first preset frequency and the electronic expansion valve at the maximum opening degree, so that the evaporation pressure is increased together, the condensation pressure is reduced, the pressure of the refrigeration system is reduced, and when the difference value between the temperature value of the outdoor heat exchanger and the outdoor environment temperature is smaller than the preset difference value, the air conditioner is controlled to be switched to a sterilization mode, non-stop switching between the self-cleaning mode and the sterilization mode is realized, and the total duration of the self-cleaning high-temperature sterilization function is reduced, so that invalid waiting time of a user is reduced, user experience is improved, and high-temperature sterilization is carried out in the sterilization mode, namely, an outdoor alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at a third preset rotating speed and a compressor runs at a preset initial frequency, after the air conditioner runs for the first preset time, the temperature value of an indoor heat exchanger is obtained, one or more of the frequency of the compressor and the on or off state of the outdoor alternating current motor are adjusted according to the priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, and the on or off state of the outdoor alternating current motor is correspondingly controlled, when guaranteeing high-temperature sterilization, the compressor can normally operate under indoor outer high temperature environment, avoids compressor low frequency operation to lead to the drive to step out and shut down to and the too high problem of condensing pressure, thereby, when not increasing the cost, the reliability of compressor operation and the reliability of air conditioner high-temperature sterilization when having improved high-temperature sterilization.

In some embodiments, the adjusting one or more of the on or off state of the outdoor ac motor and the frequency of the compressor as a function of the temperature value of the indoor heat exchanger comprises: and if the temperature value of the indoor heat exchanger is smaller than a first preset sterilization temperature value, controlling the compressor to gradually increase the frequency according to a preset frequency adjustment amount on the basis of the initial frequency so as to correspondingly increase the temperature value of the indoor heat exchanger until the temperature value of the indoor heat exchanger is larger than or equal to the first preset sterilization temperature value and smaller than a second preset sterilization temperature value.

In some embodiments, the adjusting one or more of the on or off state of the outdoor ac motor and the frequency of the compressor as a function of the temperature value of the indoor heat exchanger comprises: and if the temperature value of the indoor heat exchanger is greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, controlling the compressor to continuously run at the initial frequency so as to maintain the temperature value of the indoor heat exchanger.

In some embodiments, the adjusting one or more of the on or off state of the outdoor ac motor and the frequency of the compressor as a function of the temperature value of the indoor heat exchanger comprises: and if the temperature value of the indoor heat exchanger is greater than a second preset sterilization temperature value, controlling the compressor to gradually reduce the frequency according to a preset frequency regulating quantity on the basis of the initial frequency so as to correspondingly reduce the temperature value of the indoor heat exchanger.

In some embodiments, in reducing the frequency of the compressor, further comprising: if the temperature value of the indoor heat exchanger is reduced to be greater than or equal to a first preset sterilization temperature value and smaller than a second preset sterilization temperature value, and the frequency of the compressor is greater than or equal to the lowest frequency threshold value of the compressor at the moment, controlling the compressor to operate according to the frequency of the compressor at the moment; and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the frequency of the compressor is reduced to the lowest frequency threshold value of the compressor at the moment, controlling the outdoor alternating current motor to be closed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

In some embodiments, after controlling the outdoor ac motor to be turned off, the method further includes: if the temperature value of the indoor heat exchanger is reduced to be greater than or equal to the first preset sterilization temperature value and smaller than the second preset sterilization temperature value, controlling the outdoor alternating current motor to be continuously turned off, and controlling the outdoor alternating current motor to be turned on again when the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value so as to correspondingly increase the temperature value of the indoor heat exchanger, and controlling the outdoor alternating current motor to be turned off again when the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value; the above process is repeatedly executed to alternately control the outdoor alternating current motor to be turned on or turned off.

In some embodiments, in the sterilization mode, further comprising: and if the time accumulated by the temperature value of the indoor heat exchanger being greater than the first preset sterilization temperature value reaches a second preset time, controlling the air conditioner to exit the sterilization mode.

To achieve the above object, an embodiment of a second aspect of the present invention provides a self-cleaning sterilization control device for an air conditioner, the self-cleaning sterilization control device including: the judging module is used for judging whether the current environment meets a preset condition after receiving the self-cleaning sterilization instruction, wherein the preset condition comprises the following steps: the indoor environment temperature is greater than or equal to a first temperature threshold, and the outdoor environment temperature is greater than or equal to a second temperature threshold; the control module is used for controlling the air conditioner to enter a self-cleaning mode when the current environment meets a preset condition, wherein in the self-cleaning mode, the air conditioner is controlled to refrigerate, an indoor motor is controlled to stop or operate at a rotating speed lower than a first preset rotating speed so as to enable an indoor heat exchanger to be frosted quickly, and when a frosting exit condition is met, the indoor motor is controlled to be increased to a second preset rotating speed so as to enable the temperature of the indoor heat exchanger to be maintained in a preset temperature range, meanwhile, an air deflector is controlled to be in a set position, a compressor is controlled to be in a first preset frequency and an electronic expansion valve is controlled to be in a maximum opening degree, and the air conditioner is controlled to be switched to a sterilization mode until a difference value between a temperature value of an outdoor heat exchanger and a temperature value of the outdoor environment is smaller than a preset difference value, wherein in the sterilization mode, the air conditioner comprises: the air conditioner is controlled to heat, the air deflector is kept at the set position, meanwhile, an outdoor alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at a third preset rotating speed and at a preset initial frequency, after the air conditioner runs for a first preset time, a temperature value of an indoor heat exchanger is obtained, one or more of the on or off state of the outdoor alternating current motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, and in the adjusting process, the priority for adjusting the frequency of the compressor is larger than the priority for adjusting the on or off state of the outdoor alternating current motor.

According to the self-cleaning sterilization control device of the air conditioner, when the current environment meets the preset condition, the air conditioner is controlled to enter the self-cleaning mode, in the self-cleaning mode, the indoor motor is controlled to stop or operate at the rotating speed lower than the first preset rotating speed, so that the indoor heat exchanger is frosted quickly, and when the condition of frost formation and quit is met, the indoor motor is controlled to be increased to the second preset rotating speed to operate, so that the temperature value of the indoor heat exchanger is maintained in the preset temperature range, the temperature of the indoor heat exchanger is prevented from being overhigh, so that moisture is evaporated quickly, the indoor cleaning effect is influenced, the compressor is controlled to operate at the first preset frequency and the electronic expansion valve at the maximum opening degree, so as to increase the evaporation pressure and reduce the condensation pressure to reduce the pressure of the refrigerating system, and when the difference value between the temperature value of the outdoor heat exchanger and the temperature of the outdoor environment is smaller than the preset difference value, the air conditioner is controlled to be switched to a sterilization mode, non-stop switching between the self-cleaning mode and the sterilization mode is realized, and the total duration of the self-cleaning high-temperature sterilization function is reduced, so that invalid waiting time of a user is reduced, user experience is improved, and high-temperature sterilization is carried out in the sterilization mode, namely, an outdoor alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at a third preset rotating speed and a compressor runs at a preset initial frequency, after the air conditioner runs for the first preset time, the temperature value of an indoor heat exchanger is obtained, one or more of the frequency of the compressor and the on or off state of the outdoor alternating current motor are adjusted according to the priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, and the on or off state of the outdoor alternating current motor is correspondingly controlled, when guaranteeing high-temperature sterilization, the compressor can normally operate under indoor outer high temperature environment, avoids compressor low frequency operation to lead to the drive to step out and shut down to and the too high problem of condensing pressure, thereby, when not increasing the cost, the reliability of compressor operation and the reliability of air conditioner high-temperature sterilization when having improved high-temperature sterilization.

To achieve the above object, an embodiment of a third aspect of the present invention proposes an air conditioner including: the self-cleaning sterilization control device of the air conditioner of the embodiment; or a processor, a memory and a self-cleaning sterilization control program of the air conditioner stored on the memory and operable on the processor, the self-cleaning sterilization control program of the air conditioner, when executed by the processor, implementing the self-cleaning sterilization control method of the air conditioner as described in the above embodiments.

According to the air conditioner of the embodiment of the invention, when the current environment meets the preset condition, the air conditioner is controlled to enter a self-cleaning mode, in the self-cleaning mode, the indoor motor is controlled to stop running or run at the rotating speed lower than the first preset rotating speed, so that the indoor heat exchanger is frosted quickly, and when the condition of frost formation and exit is met, the indoor motor is controlled to be increased to the second preset rotating speed to run, so that the temperature value of the indoor heat exchanger is maintained in the preset temperature range, the temperature of the indoor heat exchanger is prevented from being overhigh, so that moisture is evaporated quickly, the indoor cleaning effect is influenced, the compressor is controlled to run at the first preset frequency and the electronic expansion valve at the maximum opening degree, so as to increase the evaporation pressure, reduce the condensation pressure and reduce the pressure of the refrigerating system, and when the difference value between the temperature value of the outdoor heat exchanger and the outdoor environment temperature is smaller than the preset difference value, the air conditioner is controlled to be switched to the sterilization mode, the method realizes non-stop switching between a self-cleaning mode and a sterilization mode, reduces the total time of the self-cleaning high-temperature sterilization function, thereby reducing invalid waiting time of users, improving user experience, and performing high-temperature sterilization in the sterilization mode, namely, controlling an outdoor alternating current motor of the air conditioner to be started, an indoor motor to be operated at a third preset rotating speed and a compressor to be operated at a preset initial frequency, acquiring the temperature value of an indoor heat exchanger after the indoor heat exchanger is operated for the first preset time, and adjusting one or more of the frequency of the compressor and the on or off state of the outdoor alternating current motor according to the priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, simultaneously controlling the initial frequency of the compressor to be more than the lowest frequency during high-temperature sterilization, correspondingly controlling the on or off state of the outdoor alternating current motor, and ensuring the high-temperature sterilization, the compressor can normally operate under indoor and outdoor high-temperature environments, the problems that the compressor is driven to stop in a step-out mode due to low-frequency operation and the condensing pressure is too high are solved, and therefore the cost is not increased, and the reliability of operation of the compressor and the reliability of high-temperature sterilization of the air conditioner during high-temperature sterilization are improved.

To achieve the above object, an embodiment of a fourth aspect of the present invention provides a computer-readable storage medium having a self-cleaning sterilization control program of an air conditioner stored thereon, which, when executed by a processor, implements the self-cleaning sterilization control method of the air conditioner as described in the above embodiment.

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.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a diagram illustrating the relationship between the condensing pressure and the operating frequency of a conventional air conditioner;

FIG. 2 is a flowchart of a self-cleaning sterilization control method of an air conditioner according to an embodiment of the present invention;

FIG. 3 is a schematic view illustrating a position of an air deflector during self-cleaning and high-temperature sterilization according to an embodiment of the present invention;

FIG. 4 is a graph illustrating a variation curve of the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger in the self-cleaning high-temperature sterilization mode according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a relationship between a rotation speed of an outdoor AC motor and a temperature value of an indoor heat exchanger according to an embodiment of the present invention;

fig. 6 is a block diagram of a self-cleaning sterilization control apparatus of an air conditioner according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

When the outdoor environment temperature is high, such as high temperature in summer, the temperature of the indoor heat exchanger is controlled to be above 56 ℃ for a period of time, such as 30 minutes and more, and the compressor is required to operate at a higher frequency, and the non-stop switching between the self-cleaning function and the high-temperature sterilization is also required, which is difficult to realize by using the conventional control method. The higher the outdoor environment temperature is, the more easily the driving step-out fault shutdown is triggered, and the problems of over-standard pressure of the refrigeration system and the like are caused, for example, the operation reliability and the electric control driving reliability of the refrigeration system are greatly examined in hot weather of more than 40 ℃. In view of the above, the method for controlling self-cleaning sterilization of an air conditioner according to an embodiment of the present invention needs to control the lowest frequency of the compressor to be 30Hz or higher in order to ensure the reliability of the operation of the compressor, and in consideration of the hysteresis of the control of the condensing temperature instead of the pressure and the reliability of the control, as shown in fig. 1. The minimum reliability operation frequency corresponding to the maximum condensing pressure of different compressors is different. And when the outdoor environment temperature is high, such as high temperature in summer, non-stop quick switching between the self-cleaning function and the high-temperature sterilization function is realized, when the air conditioner needs sterilization, the on-off state of the outdoor alternating current motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger and the priority sequence, the compressor is ensured to run at a high frequency during high-temperature sterilization in summer, the problems that the low-frequency running of the compressor causes the asynchronous driving and the shutdown, and the condensing pressure is overhigh are solved, and therefore the running reliability of the compressor and the high-temperature sterilization reliability of the air conditioner are improved.

The following describes a self-cleaning sterilization control method for an air conditioner according to an embodiment of the present invention.

The self-cleaning sterilization control method of an air conditioner according to an embodiment of the present invention will be described with reference to fig. 2, and as shown in fig. 2, the self-cleaning sterilization control method of an air conditioner according to an embodiment of the present invention includes at least steps S1 and S2.

Step S1, after receiving the self-cleaning sterilization instruction, judging whether the current environment meets the preset conditions, wherein the preset conditions include: the indoor ambient temperature is greater than or equal to a first temperature threshold, and the outdoor ambient temperature is greater than or equal to a second temperature threshold.

In an embodiment, the preset condition is that the indoor ambient temperature is greater than or equal to the first temperature threshold, and the outdoor ambient temperature is greater than or equal to the second temperature threshold, and the ambient temperature is considered to be higher, that is, the air conditioner is in a high-temperature environment, such as summer. After receiving the self-cleaning sterilization instruction, whether the current environment meets the preset condition needs to be judged, and therefore whether the current environment is a high-temperature environment is determined. Specifically, the indoor environment temperature is, for example, denoted as Tin, the outdoor environment temperature is, for example, denoted as Tout, the first temperature threshold is, for example, denoted as T1, the second temperature threshold is, for example, denoted as T2, and it is determined whether the current environment meets the preset conditions, that is, whether the indoor environment temperature Tin is greater than or equal to the first temperature threshold T1, for example, Tin ≧ T1, and the outdoor environment temperature Tout is greater than or equal to the second temperature threshold T2, for example, Tout ≧ T2; if the indoor ambient temperature Tin and the outdoor ambient temperature Tout are met at the same time, the indoor ambient temperature Tin and the outdoor ambient temperature Tout are considered to be higher, for example, the current environment is in a high-temperature environment in summer. Or, the current season may be located through an APP (application) terminal bound to the air conditioner, where the background is set in advance with respect to each season and the indoor ambient temperature Tin and the outdoor ambient temperature Tout corresponding to each season, for example, if it is determined that the current city is beijing and the current time is 7 months, it is determined that the current city is in summer, and the current indoor ambient temperature Tin and the current outdoor ambient temperature Tout meet the preset conditions.

For example, the user may send a self-cleaning sterilization command through, but not limited to, an air conditioner remote controller or a related key on an operation interface on the body of the air conditioner, after receiving the self-cleaning sterilization command, the air conditioner detects the indoor environment temperature Tin and the outdoor environment temperature Tout, and determines whether the current environment meets a preset condition, for example, the first temperature threshold T1 is 25 ℃, the second temperature threshold T2 is 24 ℃, when detecting that the indoor environment temperature Tin is 27 ℃ and the outdoor environment temperature Tout is 33 ℃, the indoor environment temperature Tin is considered to be greater than the first temperature threshold T1, and the outdoor environment temperature Tout is greater than the second temperature threshold T2, at this time, the current environment is considered to meet the preset condition, and the current environment temperature is higher, for example, in summer. Or after the air conditioner receives the self-cleaning sterilization instruction, the APP terminal is used for positioning the seasons of the current time, and if the current time is Beijing and July or August, the current environment is considered to meet the preset conditions, such as the high-temperature working condition in summer.

Step S2, if the current environment meets the preset condition, the air conditioner is controlled to enter a self-cleaning mode, wherein, in the self-cleaning mode, the air conditioner is controlled to refrigerate, and the indoor motor is controlled to stop or operate at a rotating speed lower than a first preset rotating speed, so that the indoor heat exchanger is frosted quickly, and when the condition of frost formation exit is met, the indoor motor is controlled to increase to a second preset rotating speed to operate, so that the temperature of the indoor heat exchanger is maintained in a preset temperature range, meanwhile, the air deflector is controlled to be in a set position, the compressor is controlled to operate at a first preset frequency and the electronic expansion valve is controlled to have a maximum opening, and the air conditioner is controlled to switch to a sterilization mode until the difference value between the temperature value of the outdoor heat exchanger and the temperature value of the outdoor environment is smaller than a preset difference value, wherein, in the sterilization mode, the method comprises the following steps: the air conditioner is controlled to heat, the air deflector is kept at a set position, meanwhile, an outdoor alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at a third preset rotating speed and at a preset initial frequency, after the air conditioner runs for a first preset time, a temperature value of an indoor heat exchanger is obtained, one or more of the on or off state of the outdoor alternating current motor and the frequency of the compressor is/are adjusted according to the temperature value of the indoor heat exchanger, and in the adjusting process, the priority for adjusting the frequency of the compressor is larger than the priority for adjusting the on or off state of the outdoor alternating current motor.

In the embodiment, when the current environment meets the preset condition, for example, when the temperature is high in summer, the air conditioner is controlled to enter the self-cleaning mode, and in the self-cleaning mode, the self-cleaning mode can be divided into two stages, wherein the first stage is a frosting stage of the indoor heat exchanger, and the second stage is a refrigerating system decompression stage before the defrosting water cleaning and dedusting, namely, the high-temperature sterilization mode. Specifically, after the air conditioner enters the self-cleaning mode, the air conditioner is controlled to refrigerate, and the indoor motor is controlled to stop, or the air conditioner is controlled to operate at an extremely low rotation speed, for example, at a low rotation speed of r ═ 20rpm, so that the temperature value of the indoor heat exchanger and the tube fins thereof is far lower than 0 ℃, and the frosting is fast. In other words, during the frosting phase, in order to produce frost or a larger amount of condensed water, the indoor fan is generally stopped or operated at a very low rotation speed, and the evaporation temperature is very low, even lower than-30 ℃, which corresponds to an evaporation pressure of 0.17MPa, which is much lower than that during normal cooling, for example lower than 0.95MPa, while at high outdoor temperatures, the outdoor condensation temperature is generally at 55 ℃, which corresponds to a condensation pressure of 3.3MPa or higher.

And when the condition of frost formation and exit is met, controlling the air conditioner to enter a second stage, namely a water defrosting stage, and under the stage, continuously controlling the air conditioner to operate a refrigeration mode, and simultaneously respectively controlling the rotating speed of the indoor motor, the position of the air deflector, the frequency of the compressor and the opening degree of the electronic expansion valve, so as to reduce the pressure of the refrigeration system and facilitate the switching of the high-temperature sterilization stage from the current stage. Specifically, after entering the defrosting water phase, the rotation speed of the indoor motor is controlled to be increased to a second preset rotation speed, for example, the indoor motor is controlled to be switched to a certain rotation speed from a stop state or an extremely low rotation speed, or switched to a low windshield rotation speed from a stop state or an extremely low rotation speed, for example, to be operated at a rotation speed of r _ L ═ 800rpm, and the rotation speed of the indoor motor is controlled to be increased, decreased or unchanged, so that the temperature of the indoor heat exchanger is maintained in a preset temperature range, for example, in a temperature range of 10 ℃ ± 5 ℃, thereby, while the evaporation pressure is increased, the frost is melted into water at a proper speed to flush dust on the indoor heat exchanger, and the temperature of the indoor heat exchanger is maintained in a preset temperature range, so that the problem that the moisture is rapidly evaporated due to an excessively high temperature of the indoor heat exchanger in the defrosting water phase can be prevented; meanwhile, the air deflector is controlled to be in a set position, for example, the air deflector is controlled to be in a direct blowing prevention position, and the air deflector is in the position shown in fig. 3, so that cold air is prevented from blowing to a user, and the comfort is improved; reducing the frequency of the compressor to a first preset frequency, for example, controlling the compressor to operate at the lowest frequency during high-temperature sterilization, so as to increase the evaporation pressure and reduce the condensation pressure; and increasing the opening degree of the electronic expansion valve from the current opening degree to the maximum opening degree, for example, 500 steps, to increase the refrigerant flow rate, to increase the evaporation pressure, and to decrease the condensation pressure; thereby collectively depressurizing the refrigeration system. And detecting a temperature value Tc of the outdoor heat exchanger, when a difference value between the temperature value Tc of the outdoor heat exchanger and the outdoor environment temperature Tout is recorded as delta Tout, and when the delta Tout is smaller than a preset difference value, for example, the delta Tout is smaller than 3 ℃, the condition of switching from the current stage to the high-temperature sterilization stage is considered to be met, at the moment, the air conditioner is controlled to be switched to the third stage, namely, the air conditioner is controlled to be switched to the sterilization mode to perform high-temperature sterilization, the four-way valve is controlled to be reversed, and the refrigeration mode is switched to the heating mode. It can be understood that, in the stage of defrosting water, the rotating speed of the indoor motor, the frequency of the compressor and the opening degree of the electronic expansion valve are controlled to improve the evaporation pressure and reduce the condensation pressure, so that the decompression of the refrigerating system is realized, the non-stop switching between the self-cleaning mode and the sterilization mode is realized, the total time of the self-cleaning high-temperature sterilization function is shortened, and the user experience is improved.

Fig. 4 is a schematic diagram showing a variation curve of the temperature of the indoor heat exchanger and the temperature of the outdoor heat exchanger in the self-cleaning high-temperature sterilization mode according to an embodiment of the present invention. As can be seen from fig. 4, in the frosting stage, the temperature value of the outdoor heat exchanger is high, the temperature value of the indoor heat exchanger is low, when the frosting stage exits, and when the frosting water stage enters, the temperature value of the indoor heat exchanger is rapidly increased, and the temperature value of the outdoor heat exchanger is rapidly decreased, so as to reduce the pressure of the refrigeration system, prepare for switching the sterilization stage, and when the difference value between the temperature value of the outdoor heat exchanger and the outdoor environment temperature is smaller than the preset difference value, control the air conditioner to be switched from the frosting water stage to the sterilization stage, thereby realizing the non-stop switching of the self-cleaning mode and the sterilization mode, reducing the total running time of the self-cleaning sterilization stage, reducing the invalid waiting time of the user, and improving the user experience. And through reducing the pressure difference, the problems of compressor driving step-out shutdown fault, sliding block damage inside the four-way valve, impact noise and the like during reversing of the four-way valve can be prevented.

After the air conditioner enters the sterilization mode, the sterilization is essentially heating, so that the air conditioner operates in the heating mode in the sterilization mode, and when the indoor environment temperature is high in summer, in order to avoid the situation that the indoor environment temperature quickly reaches the set temperature of the air conditioner and the air conditioner is shut down due to the fact that the indoor environment temperature is too high, the set temperature Ts is set to be far larger than the upper limit temperature value of the settable temperature, for example, the upper limit value of the settable temperature is 32 ℃, and then the set temperature Ts is set to be 50 ℃. Meanwhile, the on or off state of the outdoor AC motor, the rotating speed of the indoor motor and the frequency of the compressor are correspondingly controlled.

It can be understood that when the sterilization function is started, the outdoor alternating current motor is started or closed, and the temperature of the indoor heat exchanger is reduced or increased along with the temperature; the rotating speed of the indoor motor is reduced, and the temperature of the indoor heat exchanger is increased along with the reduction of the rotating speed of the indoor motor; the frequency of the compressor decreases or increases, and the temperature of the indoor heat exchanger decreases or increases.

Specifically, the outdoor ac motor, such as a tap motor, has a rotation speed that cannot be adjusted and has only a fixed first gear rotation speed. The speed of the indoor motor is typically provided with three or more gear positions, such as a high damper speed, e.g. r _ H, a medium damper speed, e.g. r _ M, and a low damper speed, e.g. r _ L.

Taking the case that the indoor motor is provided with three gears as an example, the process of correspondingly controlling the on or off state of the outdoor ac motor, the rotating speed of the indoor motor and the frequency of the compressor after the air conditioner enters the sterilization mode will be described.

After the air conditioner is controlled to be switched to the sterilization mode, the air deflector is controlled to be continuously positioned at the direct blowing prevention position, for example, the air deflector is controlled to continuously keep the direct blowing prevention angle, hot air is prevented from being blown out in a high-temperature environment, and therefore the comfort of a user is improved. Meanwhile, the outdoor alternating current motor is controlled to be started, the indoor motor is controlled to be initially in a stop state, the indoor motor is controlled to be started as the temperature value Tc of the indoor heat exchanger is increased, the rotating speed of the indoor motor is increased to a third preset rotating speed, for example, the rotating speed r _ L of a low windshield is increased to 800rpm, the compressor is operated at an initial frequency, for example, F (0) is increased to 45Hz, and the electronic expansion valve is operated at a preset initial opening degree, for example, the electronic expansion valve is operated at 250 steps for a first preset time.

Specifically, the initial frequency of the compressor is, for example, denoted as F (0), and F (0) is 45Hz, it is understood that, in order to satisfy the reliability of the compressor, the initial frequency F (0) of the compressor is greater than the lowest frequency of the summer high-temperature sterilization, where, for example, denoted as F _ low, then F (0) > F _ low, and F _ low is greater than the minimum frequency of the air conditioner during normal heating. The lowest frequency F _ low of the high-temperature sterilization in summer can meet the reliable operation of the heavy load low frequency of the compressor and the minimum reliable operation frequency corresponding to the maximum condensing power specified by the compressor. Therefore, in the high-temperature sterilization process of the air conditioner, the initial frequency F (0) of the compressor is always controlled to be above the lowest frequency F _ low of the high-temperature sterilization in summer, and the reliability of the operation of the compressor during the high-temperature sterilization in summer can be ensured. The F _ low is a preset value, the F _ low values corresponding to different compressors are different, the F _ low is generally determined comprehensively by technical requirements in a specification of the compressor and a specific driving scheme of the air conditioner, and generally, the F _ low value is 35Hz at the minimum.

Further, after the operation for a first preset time, for example, 2 minutes, a temperature value of the indoor heat exchanger is obtained, for example, recorded as Tc. After the temperature value Tc of the indoor heat exchanger is obtained, one or more of the frequency of the compressor and the on or off state of the outdoor alternating current motor are adjusted according to the temperature value Tc of the indoor heat exchanger and the priority sequence, so that the frequency of the compressor and the outdoor alternating current motor can run at normal frequency and rotating speed, the problems of low-frequency running of the compressor, driving desynchronized shutdown and overhigh condensation pressure are avoided, the temperature of the indoor heat exchanger is guaranteed to meet the sterilization temperature requirement, and the running reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved.

In the embodiment of the present invention, an interval formed by an upper limit sterilization temperature value and a lower limit sterilization temperature value is defined as a sterilization temperature interval, the lower limit sterilization temperature value is, for example, a first preset sterilization temperature value, which is denoted as Tc1, and the upper limit sterilization temperature value is, for example, a second preset sterilization temperature value, which is denoted as Tc2, the temperature value Tc of the indoor heat exchanger is between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, and when, for example, Tc1 is not less than Tc < Tc2, the temperature value Tc of the indoor heat exchanger is considered to be in the sterilization temperature interval.

Specifically, the first predetermined sterilization temperature value Tc1 is determined by the minimum sterilization temperature, typically 56 ℃, the second predetermined sterilization temperature value Tc2 is determined by the maximum condensing pressure of the compressor specification, the condensing temperature corresponding to the maximum condensing pressure is 64 ℃, and the corresponding second predetermined sterilization temperature value Tc2 is, for example, 60 ℃. The adjustment process of the on/off state of the outdoor ac motor and the frequency of the compressor will be described below by taking the first predetermined sterilization temperature value Tc1 as 56 ℃ and the second predetermined sterilization temperature value Tc2 as 60 ℃.

In some embodiments, adjusting one or more of an on or off state of the outdoor ac motor and a frequency of the compressor based on the temperature value of the indoor heat exchanger includes: and if the temperature value of the indoor heat exchanger is less than the first preset sterilization temperature value, controlling the compressor to gradually increase the frequency based on the initial frequency according to the preset frequency adjustment quantity so as to correspondingly increase the temperature value of the indoor heat exchanger until the temperature value of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value.

For example, after the air conditioner operates for a first preset time, for example, after the air conditioner operates for 2 minutes, the temperature value Tc of the indoor heat exchanger is obtained, if the temperature value Tc of the indoor heat exchanger is 50 ℃, the temperature value Tc of the indoor heat exchanger is considered to be smaller than a first preset sterilization temperature value Tc1, that is, Tc is smaller than Tc1, the temperature value Tc of the indoor heat exchanger is considered to be lower, and the sterilization effect cannot be guaranteed.

Specifically, the compressor is controlled to increase the frequency successively by a preset frequency adjustment amount, for example, denoted as Δ F, based on the initial frequency F (0) being 45Hz, the frequency is increased successively by the preset frequency adjustment amount Δ F, for example, F (1) being F (0) +5 being 45+5 being 50Hz, F (2) being F (1) +5 being 50+5 being 55Hz, and so on, and the frequency of the compressor is increased successively by F (n +1) being F (n) + Δ F. In the process of increasing the frequency of the compressor, the temperature value Tc of the indoor heat exchanger needs to be periodically obtained with a preset time as a period, for example, the temperature value Tc of the indoor heat exchanger is obtained again every 5s, for example, after a plurality of periods, the temperature value Tc of the indoor heat exchanger is increased to be greater than or equal to the first preset sterilization temperature value Tc1 and less than the second preset sterilization temperature value Tc2, and the temperature value Tc of the indoor heat exchanger is always between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, for example, is always between 57 ℃ and 60 ℃, and then the frequency of the compressor is kept unchanged at this time, so that the temperature value Tc of the indoor heat exchanger is maintained within the sterilization temperature interval.

In some embodiments, adjusting one or more of an on or off state of the outdoor ac motor and a frequency of the compressor based on the temperature value of the indoor heat exchanger includes: and if the temperature value of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value, controlling the compressor to continuously run at the initial frequency so as to maintain the temperature value of the indoor heat exchanger.

In a specific embodiment, after the air conditioner operates for a first preset time, for example, after 2 minutes, a temperature value Tc of the indoor heat exchanger is obtained, and if the temperature value Tc of the indoor heat exchanger is greater than or equal to a first preset sterilization temperature value Tc1 and less than a second preset sterilization temperature value Tc2, for example, Tc1 ≦ Tc < Tc2, the temperature value Tc of the indoor heat exchanger is considered to be in a sterilization temperature interval, at this time, the compressor is controlled to operate continuously at an initial frequency, that is, the compressor is controlled to operate continuously at F (n +1) ═ F (n), for example, the compressor is controlled to operate continuously at an initial frequency F (0) ═ 45Hz, so that the temperature value Tc of the indoor heat exchanger is kept in the sterilization temperature interval, and thus, the sterilization effect of the air conditioner is ensured.

In some embodiments, adjusting one or more of an on or off state of the outdoor ac motor and a frequency of the compressor based on the temperature value of the indoor heat exchanger includes: and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value, controlling the compressor to gradually reduce the frequency according to the preset frequency regulating quantity on the basis of the initial frequency so as to correspondingly reduce the temperature value of the indoor heat exchanger.

For example, after the air conditioner is operated for a first preset time, for example, after the air conditioner is operated for 2 minutes, the temperature value Tc of the indoor heat exchanger is obtained, if the temperature value Tc of the indoor heat exchanger is 63 ℃ > 60 ℃, the temperature value Tc of the indoor heat exchanger is considered to be greater than a second preset sterilization temperature value Tc2, that is, Tc > Tc2, at this time, the temperature value Tc of the indoor heat exchanger is considered to be higher, the temperature value Tc of the indoor heat exchanger needs to be lowered, so that the temperature value Tc of the indoor heat exchanger is between a first preset sterilization temperature value Tc1 and a second preset sterilization temperature value Tc2, that is, the temperature value Tc of the indoor heat exchanger is in a sterilization temperature range, at this time, one or more of the on or off state of the outdoor ac motor and the frequency of the compressor are adjusted according to the priority adjustment sequence of the on or off state of the outdoor ac motor and the frequency of the compressor, and since the priority for adjusting the frequency of the compressor is highest, therefore, when the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature value Tc2, the frequency of the compressor is adjusted.

Specifically, the compressor is controlled to gradually decrease the frequency according to a preset frequency adjustment amount, which is Δ F, based on the initial frequency F (0) being 45Hz, and gradually decrease the frequency of the compressor according to the preset frequency adjustment amount, which is Δ F, for example, F (1) F (0) -5 being 45-5 being 40Hz, and so on, so as to decrease the temperature value Tc of the indoor heat exchanger according to F (n +1) F (n) - Δ F.

Further, in the process of reducing the frequency of the compressor, the method further comprises the following steps: if the temperature value of the indoor heat exchanger is reduced to be greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, and the frequency of the compressor is greater than or equal to the lowest frequency threshold value of the compressor at the moment, controlling the compressor to operate according to the frequency of the compressor at the moment; and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the frequency of the compressor is reduced to the lowest frequency threshold value of the compressor at the moment, controlling the outdoor alternating current motor to be closed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

For example, in the process of reducing the frequency of the compressor, the temperature value Tc of the indoor heat exchanger needs to be periodically obtained by taking the preset time as a period, for example, every 5s, the temperature value Tc of the indoor heat exchanger is obtained, for example, after a plurality of 5s, if the temperature value Tc of the indoor heat exchanger is reduced to be greater than or equal to the first preset sterilization temperature value Tc1 and less than the second preset sterilization temperature value Tc2, and the frequency of the compressor is greater than or equal to the lowest frequency threshold of the compressor at this time, it is considered that the temperature value Tc of the indoor heat exchanger can be lowered to between the first preset sterilizing temperature value Tc1 and the second preset sterilizing temperature value Tc2 only by lowering the frequency of the compressor, that is, the temperature is decreased to the sterilization temperature interval, and at this time, the compressor is controlled to operate at the current frequency without continuously controlling the frequency of the compressor to be decreased, so that the temperature value Tc of the indoor heat exchanger is maintained within the sterilization temperature interval.

If the temperature value Tc of the indoor heat exchanger is still greater than the second preset sterilization temperature value Tc2, and there is no significant trend of decreasing, for example, the temperature value Tc of the indoor heat exchanger is 60 ℃, and the frequency of the compressor has been decreased to a lowest frequency threshold value of the compressor, for example, the frequency of the compressor has been decreased to F35 Hz, where the lowest frequency threshold value of the compressor is the lowest frequency F _ low during high-temperature sterilization in summer, at this time, it is considered that the temperature value Tc of the indoor heat exchanger cannot be decreased to the sterilization temperature range only by decreasing the frequency of the compressor, and at this time, according to the priority adjustment sequence, the on or off state of the outdoor ac motor needs to be adjusted to correspondingly decrease the temperature value of the indoor heat exchanger. By comparing the size relationship between the temperature value Tc of the indoor heat exchanger and the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, when the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature value Tc2, the frequency of the compressor and the on or off state of the outdoor alternating current motor are adjusted according to the priority adjustment sequence, and therefore the temperature value Tc of the indoor heat exchanger is reduced, and the temperature value Tc of the indoor heat exchanger is reduced to the sterilization temperature interval. In other words, due to the influence of high temperature in summer and the fact that the compressor must be operated at a relatively high frequency, when the frequency of the compressor is gradually decreased according to F (n +1) ═ F (n) — Δ F and has been decreased to the lowest frequency threshold F _ low of the compressor, if the temperature value Tc of the indoor heat exchanger is still greater than the second preset sterilization temperature value Tc2, which results in an excessive condensation temperature of the refrigeration system, it is necessary to control the outdoor ac motor to be turned OFF, for example, control the outdoor ac motor to be in an OFF state, and quickly decrease the condensation pressure, so as to quickly decrease the temperature value Tc of the indoor heat exchanger. When the outdoor alternating current motor is turned off, the evaporating pressure of the refrigerating system is rapidly reduced, and the condensing pressure is driven to be rapidly reduced.

In some embodiments, after controlling the outdoor ac motor to turn off, the method further includes: if the temperature value of the indoor heat exchanger is reduced to be larger than or equal to a first preset sterilization temperature value and smaller than a second preset sterilization temperature value, controlling the outdoor alternating current motor to be continuously turned off, and controlling the outdoor alternating current motor to be turned on again when the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value so as to correspondingly increase the temperature value of the indoor heat exchanger, and controlling the outdoor alternating current motor to be turned off when the temperature value of the indoor heat exchanger is larger than the second preset sterilization temperature value; the above processes are repeatedly executed to alternately control the outdoor alternating current motor to be turned on or turned off.

For example, after the outdoor ac motor is controlled to be turned off, the temperature value Tc of the indoor heat exchanger continues to be periodically obtained, if the temperature value Tc of the indoor heat exchanger is reduced to be greater than or equal to the first preset sterilization temperature value Tc1 and less than the second preset sterilization temperature value Tc2, for example, when the temperature value Tc of the indoor heat exchanger is 59 ℃, the outdoor ac motor is controlled to be continuously turned off until the temperature value Tc of the indoor heat exchanger is reduced to be less than the first preset sterilization temperature value Tc1, the outdoor ac motor is controlled to be turned on again to increase the temperature value Tc of the indoor heat exchanger, the outdoor ac motor is controlled to be turned off until the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature value Tc2, the above process is repeatedly performed, the outdoor ac motor is alternately controlled to be turned on or off, so that the temperature value Tc of the indoor heat exchanger is maintained between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, therefore, the sterilization effect of the air conditioner is ensured, the running frequency of the compressor is not influenced, the compressor is not too low to stop, and the running reliability of the compressor and the high-temperature sterilization reliability of the air conditioner are improved during high-temperature sterilization.

Specifically, as shown in fig. 5, it is a schematic diagram of the corresponding relationship between the on or off state of the outdoor ac motor and the temperature value of the indoor heat exchanger according to an embodiment of the present invention. As can be seen from fig. 5, when the outdoor ac motor is turned OFF, for example, in an OFF state, the condensing temperature is certainly lower than the first predetermined sterilization temperature value Tc1, but when the outdoor ac motor is turned ON, for example, in an ON state, the temperature value Tc of the indoor heat exchanger is increased rapidly, so as to reach the sterilization temperature range until the temperature value Tc of the indoor heat exchanger is greater than the second predetermined sterilization temperature value Tc2, for example, Tc > Tc 2. It will be appreciated that the outdoor ac motor is controlled to switch back and forth between the OFF state and the ON state, except that the period of time during which the outdoor ac motor is in the ON state and the OFF state is different. Therefore, when the temperature value Tc of the indoor heat exchanger is between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value Tc2, the outdoor ac motor is in the ON state or the OFF state, depending ON the state of the outdoor ac motor in the previous detection period, for example, the outdoor ac motor is in the ON state in the previous detection period, the outdoor ac motor is kept in the ON state in the current detection period, and the outdoor ac motor is kept in the OFF state in the previous detection period.

In some embodiments, in the sterilization mode, further comprising: and if the time accumulation that the temperature value of the indoor heat exchanger is greater than the first preset sterilization temperature value reaches the second preset time, controlling the air conditioner to exit the sterilization mode. Specifically, after the air conditioner enters the sterilization mode, the time that the temperature value Tc of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value Tc1 is counted, namely, the time that Tc is greater than or equal to Tc1 is accumulated, when the accumulated time reaches a second preset time, for example, 40 minutes, the sterilization time of the air conditioner in the sterilization mode is considered to meet the sterilization time requirement, and at the moment, the air conditioner is controlled to exit the sterilization mode. The problem that the air conditioner is not sufficiently sterilized due to too short sterilization time after the air conditioner enters the sterilization mode is solved, and therefore the sterilization effect of the air conditioner is guaranteed.

The following describes a high-temperature self-cleaning sterilization control process of an air conditioner by taking a specific embodiment as an example.

In the following examples, the relevant parameters are set as follows: the first temperature threshold T1 is 25 ℃, the second temperature threshold T2 is 24 ℃, the second preset sterilization temperature value Tc2 is 60 ℃, the first preset sterilization temperature value Tc1 is 56 ℃, the first preset time T1 is 2min, the difference Δ T between the temperature value of the outdoor heat exchanger and the outdoor environment temperature value is 3 ℃, the on or off state of the outdoor alternating current motor, the rotation speed of the indoor motor, the detection period T2 of the frequency of the compressor is 10s, the second preset time T3 is 40min, the set temperature Ts is 50 ℃, the preset frequency F _ low is 35Hz, the frequency increment Δ F is 5Hz, the third preset rotation speed R _ L is 600rpm, the first preset step Δ R is 50rpm, the fourth preset rotation speed R _ L is 800rpm, the second preset rotation speed R is 100rpm, the lowest rotation speed of the indoor motor is 400rpm, and the minimum opening speed v of the indoor motor is 250 rpm.

The first embodiment is as follows: the air conditioner receives a self-cleaning sterilization instruction, detects that the indoor environment temperature Tin is 27 ℃ and the outdoor environment temperature Tout is 42 ℃, determines that the current environment meets a preset condition, controls the air conditioner to enter a self-cleaning mode, performs a first stage, namely a frosting stage, controls the air conditioner to refrigerate, stops an indoor motor, and stops an indoor heat exchanger, when the frosting exit condition is met, the air conditioner enters a second stage, namely a frosting water stage, and simultaneously executes the following actions: a. switching the low wind gear r _ L of the indoor motor from the current rotating speed or the stop state to 800rpm, and controlling the rotating speed of the indoor motor to rise, fall or keep unchanged to enable the temperature value Tc of the indoor heat exchanger to be 10 +/-5 ℃; b. controlling the airflow guide mechanism to move to a direct blowing prevention position to prevent cold air from blowing to a user; c. the compressor reduces the frequency from the current frequency to a high-temperature sterilization stage F _ low which is 35 Hz; d. the opening degree of the electronic expansion valve is fully opened from the current opening degree to the maximum opening degree by 500 steps. And when the outdoor heat exchange temperature difference delta Tout is less than or equal to delta T which is equal to 3 ℃, entering the 3 rd stage, controlling the air conditioner to heat, setting the temperature to be 50 ℃, and controlling the four-way valve to change the direction. Meanwhile, the initial rotating speed of the indoor motor is stopped, the indoor motor gradually rises to the low wind gear rotating speed r (0) ═ r _ L ═ 800rpm along with the rising of the temperature value Tc of the indoor heat exchanger, and the air deflector is in the direct blowing prevention position. The outdoor AC motor is initially in the ON state, and the initial frequency of the compressor is F (0) ═ 45 Hz. After the four-way valve is reversed for 2min, the temperature value Tc of the indoor heat exchanger is 58 ℃, and the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are kept unchanged in the sterilization temperature interval. After a plurality of 10s, the temperature value Tc of the indoor heat exchanger is firstly larger than 60 ℃, and the frequency of the compressor is controlled to be reduced, namely F (n +1) ═ F (n) — delta F, and F (1) ═ F (0) -5 ═ 45-5 ═ 40 Hz; after a plurality of detection cycles, Tc is 62 ℃ and is more than 60 ℃, at the moment, F (n +1) is 35Hz and is F _ low, and the lowest frequency F _ low of summer high-temperature sterilization is reached, the outdoor alternating current motor is controlled to be in an OFF state, and the temperature value Tc of the indoor heat exchanger is rapidly reduced; and when the temperature value Tc of the indoor heat exchanger is less than 56 ℃, controlling the outdoor alternating current motor to be in an ON state. When the temperature value Tc of the indoor heat exchanger is more than 60 ℃ again, the outdoor alternating current motor is controlled to be in an OFF state. And the Tc is in an ON state or an OFF state between 57 ℃ and 60 ℃, depending ON the state of the outdoor alternating current motor in the last detection period. If the previous cycle is ON, the current cycle is kept in the ON state, and if the previous cycle is OFF, the current cycle is kept in the OFF state. And when the accumulated time of the temperature value Tc of the indoor heat exchanger is more than 56 ℃ for more than 40min, the self-cleaning high-temperature sterilization mode is exited.

Example two: the air conditioner receives a self-cleaning sterilization instruction, detects that the indoor environment temperature Tin is 26 ℃ and the outdoor environment temperature Tout is 30 ℃, determines that the current environment meets a preset condition, controls the air conditioner to enter a self-cleaning mode, performs a first stage, namely a frosting stage, controls the air conditioner to refrigerate, stops an indoor motor, and stops an indoor heat exchanger, when the frosting exit condition is met, the air conditioner enters a second stage, namely a frosting water stage, and simultaneously executes the following actions: a. switching the rotating speed of the indoor motor from the current rotating speed or a stopped state to a low wind gear r _ L of 800rpm, and controlling the rotating speed of the indoor motor to rise, fall or keep unchanged to enable the temperature value Tc of the indoor heat exchanger to be 10 +/-5 ℃; b. controlling the airflow guide mechanism to move to a direct blowing prevention position to prevent cold air from blowing to a user; c. the compressor reduces the frequency from the current frequency to a high-temperature sterilization stage F _ low which is 35 Hz; d. the opening degree of the electronic expansion valve is fully opened from the current opening degree to the maximum opening degree by 500 steps. And when the outdoor heat exchange temperature difference delta Tout is less than or equal to delta T which is equal to 3 ℃, entering the 3 rd stage, controlling the air conditioner to heat, setting the temperature to be 50 ℃, and controlling the four-way valve to change direction. Meanwhile, the initial rotating speed of the indoor motor is stopped, the indoor motor gradually rises to the low wind gear rotating speed r (0) ═ r _ L ═ 800rpm along with the rising of the temperature value Tc of the indoor heat exchanger, and the air deflector is in the direct blowing prevention position. The outdoor AC motor is initially in the ON state, and the initial frequency of the compressor is F (0) ═ 45 Hz. After the four-way valve is reversed for 2min, the temperature value Tc of the indoor heat exchanger is 58 ℃, and the outdoor alternating current motor, the rated rotation speed of the indoor motor and the frequency of the compressor are kept unchanged in the sterilization temperature interval. After a plurality of 10s, the temperature value Tc of the indoor heat exchanger is firstly larger than 60 ℃, and the frequency of the compressor is controlled to be reduced, namely F (n +1) ═ F (n) — delta F, and F (1) ═ F (0) -5 ═ 45-5 ═ 40 Hz; after a plurality of detection cycles, the temperature value Tc of the indoor heat exchanger is 58 ℃, at the moment, F (n +1) is 35Hz and F _ low, which is the lowest frequency F _ low of summer high-temperature sterilization, the temperature value Tc of the subsequent indoor heat exchanger is always maintained between 57 ℃ and 60 ℃, and then the lowest frequency F _ low of summer high-temperature sterilization is kept unchanged. And when the accumulated time of the temperature value Tc of the indoor heat exchanger is more than 56 ℃ for more than 40min, the self-cleaning high-temperature sterilization mode is exited.

Example three: the air conditioner receives a self-cleaning sterilization instruction, detects that the indoor environment temperature Tin is 25 ℃ and the outdoor environment temperature Tout is 25 ℃, determines that the current environment meets a preset condition, controls the air conditioner to enter a self-cleaning mode, performs a first stage, namely a frosting stage, controls the air conditioner to refrigerate, stops an indoor motor, and stops an indoor heat exchanger, when the frosting exit condition is met, the air conditioner enters a second stage, namely a frosting water stage, and simultaneously executes the following actions: a. switching the rotating speed of the indoor motor from the current rotating speed or a stopped state to a low wind gear r _ L of 800rpm, and controlling the rotating speed of the indoor motor to rise, fall or keep unchanged to enable the temperature value Tc of the indoor heat exchanger to be 10 +/-5 ℃; b. controlling the airflow guide mechanism to move to a direct blowing prevention position to prevent cold air from blowing to a user; c. the compressor reduces the frequency from the current frequency to a high-temperature sterilization stage F _ low which is 35 Hz; d. the opening degree of the electronic expansion valve is fully opened from the current opening degree to the maximum opening degree by 500 steps. And when the outdoor heat exchange temperature difference delta Tout is less than or equal to delta T which is equal to 3 ℃, entering the 3 rd stage, controlling the air conditioner to heat, setting the temperature to be 50 ℃, and controlling the four-way valve to change the direction. Meanwhile, the initial rotating speed of the indoor motor is stopped, the indoor motor gradually rises to the low wind gear rotating speed r (0) ═ r _ L ═ 800rpm along with the rising of the temperature value Tc of the indoor heat exchanger, and the air deflector is in the direct blowing prevention position. The outdoor AC motor is initially in the ON state, and the initial frequency of the compressor is F (0) ═ 45 Hz. After the four-way valve is reversed for 2min, the temperature value Tc of the indoor heat exchanger is 50 ℃, and the frequency of the compressor is controlled to rise, namely F (n +1) ═ F (n) + DeltaF, and F (1) ═ F (0) +5 ═ 45+5 ═ 50Hz for the first time. And (3) maintaining the temperature value Tc of the indoor heat exchanger between 57 ℃ and 60 ℃ until a plurality of periods, and keeping the frequency of the current compressor unchanged. And when the accumulated time of the temperature value Tc of the indoor heat exchanger is more than 56 ℃ for more than 40min, the self-cleaning high-temperature sterilization mode is exited.

A self-cleaning sterilization control apparatus of an air conditioner according to an embodiment of the second aspect of the present invention will be described with reference to fig. 6.

Fig. 6 is a block diagram of a self-cleaning sterilization control apparatus of an air conditioner according to an embodiment of the present invention. As shown in fig. 6, the self-cleaning sterilization control device 2 of the air conditioner according to the embodiment of the present invention includes a determination module 20 and a control module 21.

The determining module 20 is configured to determine whether the current environment meets a preset condition after receiving the self-cleaning sterilization instruction, where the preset condition includes: the indoor environment temperature is greater than or equal to a first temperature threshold, and the outdoor environment temperature is greater than or equal to a second temperature threshold; the control module 21 is configured to control the air conditioner to enter a self-cleaning mode when a current environment meets a preset condition, wherein in the self-cleaning mode, the air conditioner is controlled to refrigerate, and the indoor motor is controlled to stop or operate at a rotation speed lower than a first preset rotation speed, so that the indoor heat exchanger is rapidly frosted, and when a frosting exit condition is met, the indoor motor is controlled to increase to a second preset rotation speed to operate, so that the temperature of the indoor heat exchanger is maintained within a preset temperature range, and meanwhile, the air deflector is controlled to be in a set position, the compressor is controlled to operate at a first preset frequency and the electronic expansion valve is controlled to have a maximum opening degree, and until a difference value between a temperature value of the outdoor heat exchanger and an outdoor environment temperature value is smaller than a preset difference value, the air conditioner is controlled to switch to a sterilization mode, wherein in the sterilization mode, the air conditioner comprises: the air conditioner is controlled to heat, the air deflector is kept at a set position, meanwhile, an outdoor alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at a third preset rotating speed and at a preset initial frequency, after the air conditioner runs for a first preset time, a temperature value of an indoor heat exchanger is obtained, one or more of the on or off state of the outdoor alternating current motor and the frequency of the compressor is/are adjusted according to the temperature value of the indoor heat exchanger, and in the adjusting process, the priority for adjusting the frequency of the compressor is larger than the priority for adjusting the on or off state of the outdoor alternating current motor.

According to the self-cleaning sterilization control device 2 of the air conditioner of the embodiment of the invention, when the current environment meets the preset condition, the air conditioner is controlled to enter the self-cleaning mode, under the self-cleaning mode, the indoor motor is controlled to stop or operate at the rotating speed lower than the first preset rotating speed, so that the indoor heat exchanger is frosted quickly, and when the condition of frost formation and exit is met, the indoor motor is controlled to be increased to the second preset rotating speed to operate, so that the temperature value of the indoor heat exchanger is maintained in the preset temperature range, the temperature of the indoor heat exchanger is prevented from being overhigh, so that moisture is evaporated quickly, the indoor cleaning effect is influenced, and the compressor is controlled to operate at the first preset frequency and the electronic expansion valve at the maximum opening degree, so as to increase the evaporation pressure and reduce the condensation pressure, so as to reduce the pressure of the refrigeration system, until the difference value between the temperature value of the outdoor heat exchanger and the outdoor environment temperature is smaller than the preset difference value, the air conditioner is controlled to be switched to a sterilization mode, non-stop switching between the self-cleaning mode and the sterilization mode is realized, and the total duration of the self-cleaning high-temperature sterilization function is reduced, so that invalid waiting time of a user is reduced, user experience is improved, and high-temperature sterilization is carried out in the sterilization mode, namely, an outdoor alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at a third preset rotating speed and a compressor runs at a preset initial frequency, after the air conditioner runs for the first preset time, the temperature value of an indoor heat exchanger is obtained, one or more of the frequency of the compressor and the on or off state of the outdoor alternating current motor are adjusted according to the priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, meanwhile, the initial frequency of the compressor is controlled to be above the lowest frequency during high-temperature sterilization, and the on or off state of the outdoor alternating current motor is correspondingly controlled, when guaranteeing high-temperature sterilization, the compressor can normally operate under indoor outer high temperature environment, avoids compressor low frequency operation to lead to the drive to step out and shut down to and the too high problem of condensing pressure, thereby, when not increasing the cost, the reliability of compressor operation and the reliability of air conditioner high-temperature sterilization when having improved high-temperature sterilization.

In some embodiments, the control module 21 is specifically configured to, when the temperature value of the indoor heat exchanger is less than the first preset sterilization temperature value, control the compressor to gradually increase the frequency based on the initial frequency according to the preset frequency adjustment amount to correspondingly increase the temperature value of the indoor heat exchanger until the temperature value of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value.

In some embodiments, the control module 21 is specifically configured to, when the temperature value of the indoor heat exchanger is greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, control the compressor to continuously operate at the initial frequency to maintain the temperature value of the indoor heat exchanger.

In some embodiments, the control module 21 is specifically configured to, when the temperature value of the indoor heat exchanger is greater than a second preset sterilization temperature value, control the compressor to gradually decrease the frequency according to a preset frequency adjustment amount on the basis of the initial frequency, so as to correspondingly decrease the temperature value of the indoor heat exchanger.

In some embodiments, the control module 21 is further configured to, when the temperature value of the indoor heat exchanger is reduced to be greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, and the frequency of the compressor is greater than or equal to a lowest frequency threshold of the compressor at this time, control the compressor to operate according to the frequency of the compressor at this time; and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the frequency of the compressor is reduced to the lowest frequency threshold value of the compressor at the moment, controlling the outdoor alternating current motor to be closed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

In some embodiments, the control module 21 is further configured to, when the temperature value of the indoor heat exchanger is reduced to be greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, control the outdoor ac motor to be continuously turned off, until the temperature value of the indoor heat exchanger is less than the first preset sterilization temperature value, control the outdoor ac motor to be turned on again to correspondingly increase the temperature value of the indoor heat exchanger, and until the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value, control the outdoor ac motor to be turned off again; the above processes are repeatedly executed to alternately control the outdoor alternating current motor to be turned on or turned off.

In some embodiments, in the sterilization mode, the control module 21 is further configured to control the air conditioner to exit the sterilization mode when the accumulated time for detecting that the temperature value of the indoor heat exchanger is greater than the first preset sterilization temperature value reaches the second preset time.

Specifically, after the air conditioner enters the sterilization mode, the time that the temperature value Tc of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value Tc1 is counted, namely, the time that Tc is greater than or equal to Tc1 is accumulated, when the accumulated time reaches a second preset time, for example, 40 minutes, the sterilization time of the air conditioner in the sterilization mode is considered to meet the sterilization time requirement, and at the moment, the air conditioner is controlled to exit the sterilization mode. The problem that the air conditioner is not sufficiently sterilized due to too short sterilization time after the air conditioner enters the sterilization mode is solved, and therefore the sterilization effect of the air conditioner is guaranteed.

It should be noted that the specific implementation manner of the self-cleaning sterilization control device 2 of the air conditioner according to the embodiment of the present invention is similar to the specific implementation manner of the self-cleaning sterilization control method of the air conditioner according to any of the above embodiments of the present invention, and please refer to the description of the method part specifically, and the description is omitted here for reducing redundancy.

An air conditioner according to an embodiment of a third aspect of the present invention is described below, including: the self-cleaning sterilization control device 2 of the air conditioner of any one of the above embodiments; alternatively, the air conditioner includes: the self-cleaning sterilization control program of the air conditioner realizes the self-cleaning sterilization control method of the air conditioner of any one of the above embodiments when being executed by the processor.

In this embodiment, when the air conditioner performs sterilization, a specific implementation manner of the air conditioner is similar to that of the self-cleaning sterilization control device 2 of the air conditioner according to any of the above embodiments of the present invention, and please refer to the description of the self-cleaning sterilization control device 2 of the air conditioner specifically, and in order to reduce redundancy, it is not described herein again.

A computer-readable storage medium according to a fourth embodiment of the present invention is described below, the computer-readable storage medium having a self-cleaning sterilization control program of an air conditioner stored thereon, the self-cleaning sterilization control program of the air conditioner, when executed by a processor, implementing the self-cleaning sterilization control method of the air conditioner according to any one of the above-described embodiments.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A self-cleaning sterilization control method of an air conditioner is characterized by comprising the following steps:

after receiving a self-cleaning sterilization instruction, judging whether the current environment meets a preset condition, wherein the preset condition comprises the following steps: the indoor environment temperature is greater than or equal to a first temperature threshold, and the outdoor environment temperature is greater than or equal to a second temperature threshold;

if so, controlling the air conditioner to enter a self-cleaning mode, wherein in the self-cleaning mode, the air conditioner is controlled to refrigerate, an indoor motor is controlled to stop or operate at a rotating speed lower than a first preset rotating speed so as to quickly frost an indoor heat exchanger, and when a frost-formation exit condition is met, the indoor motor is controlled to be increased to a second preset rotating speed so as to operate so as to maintain the temperature of the indoor heat exchanger within a preset temperature range, meanwhile, an air deflector is controlled to be in a set position, a compressor is controlled to operate at a first preset frequency and an electronic expansion valve at a maximum opening degree, and the air conditioner is controlled to be switched to a sterilization mode until a difference value between a temperature value of an outdoor heat exchanger and an outdoor environment temperature value is smaller than a preset difference value, wherein in the sterilization mode, the air conditioner comprises:

the air conditioner is controlled to heat, the air deflector is kept at the set position, meanwhile, an outdoor alternating current motor of the air conditioner is controlled to be started, an indoor motor runs at a third preset rotating speed and at a preset initial frequency, after the air conditioner runs for a first preset time, a temperature value of an indoor heat exchanger is obtained, one or more of the on or off state of the outdoor alternating current motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, and in the adjusting process, the priority for adjusting the frequency of the compressor is larger than the priority for adjusting the on or off state of the outdoor alternating current motor.

2. The self-cleaning sterilization control method of an air conditioner according to claim 1, wherein the adjusting one or more of the on or off state of the outdoor ac motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger includes:

and if the temperature value of the indoor heat exchanger is smaller than a first preset sterilization temperature value, controlling the compressor to gradually increase the frequency according to a preset frequency adjustment amount on the basis of the initial frequency so as to correspondingly increase the temperature value of the indoor heat exchanger until the temperature value of the indoor heat exchanger is larger than or equal to the first preset sterilization temperature value and smaller than a second preset sterilization temperature value.

3. The self-cleaning sterilization control method of an air conditioner according to claim 1, wherein the adjusting one or more of the on or off state of the outdoor ac motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger includes:

and if the temperature value of the indoor heat exchanger is greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, controlling the compressor to continuously run at the initial frequency so as to maintain the temperature value of the indoor heat exchanger.

4. The self-cleaning sterilization control method of an air conditioner according to claim 1, wherein the adjusting one or more of the on or off state of the outdoor ac motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger includes:

and if the temperature value of the indoor heat exchanger is greater than a second preset sterilization temperature value, controlling the compressor to gradually reduce the frequency according to a preset frequency regulating quantity on the basis of the initial frequency so as to correspondingly reduce the temperature value of the indoor heat exchanger.

5. The self-cleaning sterilization control method of an air conditioner according to claim 4, further comprising, in reducing the frequency of the compressor:

if the temperature value of the indoor heat exchanger is reduced to be greater than or equal to a first preset sterilization temperature value and smaller than a second preset sterilization temperature value, and the frequency of the compressor is greater than or equal to the lowest frequency threshold value of the compressor at the moment, controlling the compressor to operate according to the frequency of the compressor at the moment; and if the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value and the frequency of the compressor is reduced to the lowest frequency threshold value of the compressor at the moment, controlling the outdoor alternating current motor to be closed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

6. The self-cleaning sterilization control method of an air conditioner according to claim 5, further comprising, after controlling the outdoor AC motor to be turned off:

if the temperature value of the indoor heat exchanger is reduced to be greater than or equal to the first preset sterilization temperature value and smaller than the second preset sterilization temperature value, controlling the outdoor alternating current motor to be continuously turned off, and controlling the outdoor alternating current motor to be turned on again when the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value so as to correspondingly increase the temperature value of the indoor heat exchanger, and controlling the outdoor alternating current motor to be turned off again when the temperature value of the indoor heat exchanger is greater than the second preset sterilization temperature value; the above process is repeatedly executed to alternately control the outdoor alternating current motor to be turned on or turned off.

7. The self-cleaning sterilization control method of an air conditioner according to any one of claims 1 to 6, further comprising, in the sterilization mode:

and if the time accumulated by the temperature value of the indoor heat exchanger being greater than the first preset sterilization temperature value reaches a second preset time, controlling the air conditioner to exit the sterilization mode.

8. A self-cleaning sterilization control device of an air conditioner is characterized by comprising:

the judging module is used for judging whether the current environment meets a preset condition after receiving the self-cleaning sterilization instruction, wherein the preset condition comprises the following steps: the indoor environment temperature is greater than or equal to a first temperature threshold, and the outdoor environment temperature is greater than or equal to a second temperature threshold;

the control module is used for controlling the air conditioner to enter a self-cleaning mode when the current environment meets a preset condition, wherein in the self-cleaning mode, the air conditioner is controlled to refrigerate, an indoor motor is controlled to stop or operate at a rotating speed lower than a first preset rotating speed so as to enable an indoor heat exchanger to be frosted quickly, and when a frosting exit condition is met, the indoor motor is controlled to be increased to a second preset rotating speed so as to enable the temperature of the indoor heat exchanger to be maintained in a preset temperature range, meanwhile, an air deflector is controlled to be in a set position, a compressor is controlled to be in a first preset frequency and an electronic expansion valve is controlled to be in a maximum opening degree, and the air conditioner is controlled to be switched to a sterilization mode until a difference value between a temperature value of an outdoor heat exchanger and a temperature value of the outdoor environment is smaller than a preset difference value, wherein in the sterilization mode, the air conditioner comprises:

9. An air conditioner, comprising:

a self-cleaning sterilization control device of an air conditioner as set forth in claim 8; or

A processor, a memory, and a self-cleaning sterilization control program of an air conditioner stored on the memory and executable on the processor, the self-cleaning sterilization control program of the air conditioner implementing the self-cleaning sterilization control method of the air conditioner as claimed in any one of claims 1 to 7 when executed by the processor.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a self-cleaning sterilization control program of an air conditioner, which when executed by a processor implements the self-cleaning sterilization control method of an air conditioner according to any one of claims 1 to 7.