CN113405231B

CN113405231B - Self-cleaning sterilization control method and device for air conditioner, air conditioner and storage medium

Info

Publication number: CN113405231B
Application number: CN202110710795.5A
Authority: CN
Inventors: 王军; 张素珍; 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: CN113405231A

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 increased to a second preset rotation speed, a compressor to be operated at a preset frequency and with a maximum opening degree of an electronic expansion valve, thereby jointly increasing an evaporation pressure and 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, improving user experience, and when the high-temperature sterilization mode is switched to the high-temperature sterilization mode for high-temperature sterilization, obtaining a temperature value of an indoor heat exchanger, and adjusting one or more of an on or off state of an outdoor ac motor, a rotation speed of the indoor motor, and a frequency of the compressor 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 high-temperature sterilization, the on-off state of the outdoor alternating current motor and the rotating speed of the indoor motor are 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 yes, the air conditioner is controlled to enter a self-cleaning mode, the air conditioner is controlled to refrigerate in the self-cleaning mode, 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 quickly frost, the indoor motor is controlled to be increased to a second preset rotating speed to operate when a frost-formation exit condition is met 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 operates at a 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, the outdoor alternating current motor is controlled to be started, the indoor motor is controlled to operate at a third preset rotating speed, the compressor operates at the preset frequency, the electronic expansion valve operates at a preset initial opening degree, a temperature value of the indoor heat exchanger is obtained after the outdoor alternating current motor operates for a first preset time, one or more of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, in the adjusting process, the priority for adjusting the on or off state of the outdoor alternating current motor is the highest, and the priority for adjusting the frequency of the compressor is the lowest.

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 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, moisture is evaporated quickly, the indoor cleaning effect is influenced, the compressor is controlled to operate at the preset frequency and the maximum opening degree of the electronic expansion valve, so that the evaporation pressure is increased together, the condensation pressure is reduced, the pressure of the refrigerating system is reduced, 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 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 run at a third preset rotating speed and a compressor to run at a preset frequency, acquiring a temperature value of an indoor heat exchanger after running for a first preset time, and adjusting one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor according to a priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, controlling the frequency of the compressor to be at or above the lowest frequency during high-temperature sterilization, and correspondingly controlling the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor, 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 an on or off state of the outdoor ac motor, a rotational speed of the indoor motor, and a 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 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 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 closed, and controlling the outdoor alternating current motor to be started again until 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 closed again until the temperature value of the indoor heat exchanger is larger 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, the adjusting one or more of an on or off state of the outdoor ac motor, a rotational speed of the indoor motor, and a frequency of the compressor according to the temperature value of the indoor heat exchanger includes: if the temperature value of the indoor heat exchanger is smaller than a first preset sterilization temperature value, controlling the outdoor alternating current motor to be kept started so as to correspondingly increase the temperature value of the indoor heat exchanger; after the outdoor alternating current motor is kept started for a second preset time, if the temperature value of the indoor heat exchanger is always smaller than the first preset sterilization temperature value, the indoor motor is controlled to gradually reduce the rotating speed according to a preset step length on the basis of the third preset rotating speed so as to correspondingly increase the temperature value of the indoor heat exchanger.

In some embodiments, after the controlling the indoor motor to gradually decrease the rotation speed by a preset step based on the third preset rotation speed, the method further includes: in the process of reducing the rotating speed of the indoor motor, if the temperature value of the indoor heat exchanger is increased to be greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value, and the rotating speed of the indoor motor is greater than or equal to the minimum rotating speed threshold value of the indoor motor at the moment, the indoor motor is controlled to operate according to the rotating speed of the indoor motor at the moment.

In some embodiments, in reducing the rotation speed of the indoor motor, the method further includes: and if the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value and the rotating speed of the indoor motor is reduced to the lowest rotating speed threshold value of the indoor motor at the moment, controlling the compressor to successively increase the frequency according to preset frequency increment on the basis of the preset 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 the second preset sterilization temperature value.

In some embodiments, in the sterilization mode, further comprising: and if the time accumulated by the indoor heat exchanger with the temperature value larger than the first preset sterilization temperature value reaches a third 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 proposes a self-cleaning sterilization control device of 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 firstly enter a self-cleaning mode when the current environment meets a preset condition, controlling the air conditioner to refrigerate in the self-cleaning mode, controlling an indoor motor to stop or operate at a rotating speed lower than a first preset rotating speed so as to enable an indoor heat exchanger to quickly frost, controlling the indoor motor to be increased to a second preset rotating speed to operate when a frosting exit condition is met so as to enable the temperature of the indoor heat exchanger to be maintained in a preset temperature range, and simultaneously controlling an air deflector to be in a set position, a compressor to be at a preset frequency and an electronic expansion valve to be at a maximum opening degree 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, and controlling the air conditioner to be switched to a sterilization mode, wherein the sterilization mode 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 of the air conditioner runs at a third preset rotating speed, a compressor runs at the preset frequency, the electronic expansion valve runs at a preset initial opening degree, a temperature value of an indoor heat exchanger is obtained after the air conditioner runs for a first preset time, one or more of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, in the adjusting process, the priority for adjusting the on or off state of the outdoor alternating current motor is the highest, and the priority for adjusting the frequency of the compressor is the lowest.

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 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 too high, moisture is evaporated quickly, the indoor cleaning effect is influenced, the compressor is controlled to operate at the 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 temperature of the outdoor environment 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 run at a third preset rotating speed and a compressor to run at a preset frequency, acquiring a temperature value of an indoor heat exchanger after running for a first preset time, and adjusting one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor according to a priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, controlling the frequency of the compressor to be at or above the lowest frequency during high-temperature sterilization, and correspondingly controlling the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor, 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 provided by 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 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 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, the moisture is evaporated quickly, the indoor cleaning effect is influenced, the compressor is controlled to operate at the preset frequency and the electronic expansion valve at the maximum opening degree, the evaporation pressure is increased together, the condensation pressure is reduced, the pressure is reduced for 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 run at a third preset rotating speed and a compressor to run at a preset frequency, acquiring a temperature value of an indoor heat exchanger after running for a first preset time, and adjusting one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor according to a priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, controlling the frequency of the compressor to be at or above the lowest frequency during high-temperature sterilization, and correspondingly controlling the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor, 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 fourth aspect of the present invention proposes a computer-readable storage medium having 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 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 an outdoor alternating current motor of the air conditioner, the rotating speed of the indoor motor and the frequency of the compressor are controlled 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 the high-temperature sterilization in summer, and the problems of driving out-of-step shutdown and overhigh condensation pressure caused by the low-frequency running of the compressor are avoided, so that 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 into a self-cleaning mode, under the self-cleaning mode, the air conditioner is controlled to refrigerate, 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 quitting is met, the indoor motor is controlled to be increased 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 operates at a preset frequency and the electronic expansion valve operates at a maximum opening degree, and 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, the air conditioner is controlled to switch to a sterilization mode, wherein under the sterilization mode, the air conditioner comprises the following steps: the air conditioner is controlled to heat, the air deflector is kept at a set position, meanwhile, the outdoor alternating current motor is controlled to be started, the indoor motor runs at a third preset rotating speed, the compressor runs at a preset frequency, the electronic expansion valve runs at a preset initial opening degree, after the air conditioner runs for a first preset time, a temperature value of the indoor heat exchanger is obtained, one or more of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, in the adjusting process, the priority for adjusting the on or off state of the outdoor alternating current motor is the highest, and the priority for adjusting the frequency of the compressor is the lowest.

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 controlled to be in a 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 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 an unadjustable rotation speed and only has 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 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 of the indoor motor is increased to a low windshield rotating speed r _ L which is 800rpm, the compressor is operated at a preset frequency, for example, the lowest frequency of high-temperature sterilization in summer, 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 preset frequency of the compressor is the lowest frequency of high-temperature sterilization in summer, for example, recorded as F _ low, and is greater than the minimum frequency of the air conditioner during normal heating, and when the compressor operates at the preset frequency F _ low, the reliable operation of the compressor at a heavy load low frequency can be satisfied, and the minimum reliable operation frequency corresponding to the maximum condensing force specified by the compressor can be satisfied. Therefore, in the high-temperature sterilization process of the air conditioner, the preset frequency F _ low of the compressor is always controlled to be above the lowest frequency 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.

In order to satisfy the problems of reliability of the compressor and prevention of step-out of driving, the operation frequency of the compressor is defined to be operated at the lowest frequency F _ low of the summer pasteurization, and initially remains unchanged, may be increased if necessary, but cannot be decreased.

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 on-off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the temperature value Tc of the indoor heat exchanger and the priority sequence, so that the rotating speed of the indoor motor and the frequency of the compressor can run at normal frequency or rotating speed, the problems of driving step-out shutdown and overhigh condensation pressure due to low-frequency running of the compressor are avoided, the temperature of the indoor heat exchanger is guaranteed to meet the sterilization temperature requirement, and meanwhile, 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, the rotation speed of the indoor 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, a rotational speed of the indoor motor, and a frequency of the compressor based on the temperature value of the indoor heat exchanger includes: if the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value, controlling the outdoor alternating current motor to be kept started so as to correspondingly increase the temperature value of the indoor heat exchanger; after the outdoor alternating current motor is kept started for the second preset time, if the temperature value of the indoor heat exchanger is always smaller than the first preset sterilization temperature value, the indoor motor is controlled to gradually reduce the rotating speed according to the preset step length on the basis of the third preset rotating speed so as to correspondingly increase the temperature value of the indoor heat exchanger.

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 ensured, at this time, the temperature value Tc of the indoor heat exchanger needs to be increased, so that the temperature value Tc of the indoor heat exchanger is between the 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 within a sterilization temperature range, at this time, one or more of the on or off state of the outdoor ac motor, the rotation speed of the indoor motor, and the frequency of the compressor needs to be sequentially adjusted according to the priority order of the on or off state of the outdoor ac motor, the rotation speed of the indoor motor, and the frequency of the compressor, since the priority of adjusting the on or off state of the outdoor ac motor is highest, when the temperature value Tc of the indoor heat exchanger is less than the first preset sterilization temperature value Tc1, the on or off state of the outdoor ac motor is adjusted first.

Specifically, when the temperature value Tc of the indoor heat exchanger is less than the first preset sterilization temperature value Tc1, the outdoor ac motor is controlled to be kept ON, for example, the outdoor ac motor is controlled to be in an ON state, so as to correspondingly increase the temperature value Tc of the indoor heat exchanger, and in the process of keeping the outdoor ac motor ON, the temperature value Tc of the indoor heat exchanger needs to be periodically obtained with a preset time as a period, for example, every 5s, the temperature value Tc of the indoor heat exchanger is obtained again, for example, after a plurality of 5s, the temperature value Tc of the indoor heat exchanger is 53 ℃, and has no rising trend, and the outdoor ac motor is kept ON for the second preset time, it is considered that the temperature value Tc of the indoor heat exchanger cannot be increased to be between the first preset sterilization temperature value Tc1 and the second preset sterilization temperature value 2, that is, the temperature is increased to the sterilization temperature range, at this time, according to the priority adjustment sequence, the rotating speed of the indoor motor needs to be adjusted, and when the rotating speed of the indoor motor is adjusted, the indoor motor is controlled to gradually reduce the rotating speed according to the preset step length on the basis of the third preset rotating speed so as to correspondingly increase the temperature value Tc of the indoor heat exchanger. By comparing the temperature value Tc of the indoor heat exchanger with the first preset sterilization temperature value Tc1, when the temperature value Tc of the indoor heat exchanger is smaller than the first preset sterilization temperature value Tc1, the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor are adjusted according to the priority adjustment sequence, so that the temperature value Tc of the indoor heat exchanger is increased to enable the temperature value Tc of the indoor heat exchanger to rise to the sterilization temperature interval.

In some embodiments, after the controlling the indoor motor to gradually decrease the rotation speed according to the preset step based on the third preset rotation speed, the method further includes: in the process of reducing the rotating speed of the indoor motor, if the temperature value of the indoor heat exchanger is increased to be greater than or equal to a first preset sterilization temperature value and less than a second preset sterilization temperature value, and the rotating speed of the indoor motor is greater than or equal to the lowest rotating speed threshold value of the indoor motor at the moment, the indoor motor is controlled to operate according to the rotating speed of the indoor motor at the moment.

For example, in the process of reducing the rotation speed of the indoor motor, the indoor motor needs to be controlled to gradually reduce the rotation speed according to a preset step length based on a third preset rotation speed threshold value to increase the temperature value Tc of the indoor heat exchanger, for example, the preset step length is, for example, denoted as Δ r, at this time, the indoor motor is controlled to gradually reduce the rotation speed of the indoor motor according to the preset step length Δ r based on the low windshield rotation speed r (0) -r _ L-800 rpm, that is, r (1) -r (0-800-100-700-rpm, r (2) -r (1-100-700-600-rpm, and so on, the rotation speed of the indoor motor is gradually reduced according to r (n +1) -r (n) - Δ r. In the process of reducing the rotating speed of the indoor motor, the temperature Tc of the indoor heat exchanger needs to be obtained, if the temperature value Tc of the indoor heat exchanger is increased to be greater than or equal to a first preset sterilization temperature value Tc1 and smaller than a second preset sterilization temperature value Tc2, and the rotating speed of the indoor motor is greater than or equal to the minimum rotating speed threshold of the indoor motor at the moment, namely, the minimum reliable running rotating speed of the indoor motor, the rotating speed of the indoor motor is adjusted after the outdoor alternating current motor is controlled to be kept started, so that the outdoor alternating current motor and the indoor motor are jointly adjusted, the temperature value Tc of the indoor heat exchanger can be increased to a sterilization temperature interval, at the moment, the rotating speed of the indoor motor does not need to be continuously reduced, the indoor motor is controlled to run at the rotating speed at the moment, and the temperature value Tc of the indoor heat exchanger is maintained in the sterilization temperature interval. In other words, if the temperature value Tc of the indoor heat exchanger is always smaller than the first preset sterilization temperature value Tc1 and the outdoor ac motor is always kept on, the rotation speed of the indoor motor is controlled to decrease to increase the temperature value Tc of the indoor heat exchanger, i.e., r (n +1) ═ r (n) — Δ r, where r (0) ═ r _ L, and the minimum value of r (n +1) is the minimum rotation speed rmin of reliable operation, i.e., the minimum rotation speed threshold of the indoor motor.

In some embodiments, in reducing the rotation speed of the indoor motor, the method further includes: if the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value and the rotating speed of the indoor motor is reduced to the lowest rotating speed threshold value of the indoor motor at the moment, controlling the compressor to increase the frequency gradually according to the preset frequency increment on the basis of the preset 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 the second preset sterilization temperature value.

For example, in the process of reducing the rotation speed of the indoor motor, if the temperature value Tc of the indoor heat exchanger is always smaller than the first preset sterilization temperature value Tc1, and there is no obvious trend of rising, and the rotation speed of the indoor motor has been reduced to the minimum rotation speed threshold of the indoor motor at this time, for example, the rotation speed of the indoor motor has been reduced to r ═ 400rpm, which is the minimum reliable operation rotation speed of the indoor motor, it is considered that the temperature value Tc of the indoor heat exchanger cannot be increased to the sterilization temperature interval by controlling the outdoor ac motor to start and reduce the rotation speed of the indoor motor, and at this time, according to the priority adjustment sequence, the frequency of the compressor needs to be adjusted, so that the temperature value Tc of the indoor heat exchanger rises to the sterilization temperature interval.

Further, the outdoor ac motor is kept turned on, and the rotation speed of the indoor motor is reduced to the minimum rotation speed threshold of the indoor motor, at this time, the temperature value Tc of the indoor heat exchanger is still less than the first preset sterilization temperature value Tc1, the compressor is controlled to increase the frequency successively according to a preset frequency increment based on the preset frequency, for example, the compressor is controlled to increase the frequency successively according to the preset frequency increment based on F (0) ═ F _ low, that is, F (1) ═ F (0) +5 ═ 35+5 ═ 40Hz, and the compressor is controlled to increase the temperature value Tc of the indoor heat exchanger successively according to F (n +1) ═ F (n) () Δ F, so as to increase the temperature value Tc of the indoor heat exchanger until the temperature value Tc of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value Tc1 and less than the second preset sterilization temperature value Tc 2. 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 smaller than the first preset sterilization temperature value Tc1, the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the priority adjusting sequence, so that the temperature value Tc of the indoor heat exchanger is in a sterilization temperature range, the sterilization effect of the air conditioner is ensured, the operating frequency of the compressor is considered, the compressor frequency is not too low to cause shutdown, and the operation reliability of the compressor and the high-temperature sterilization reliability of the air conditioner during high-temperature sterilization are improved. In other words, if the outdoor ac motor is kept on and the rotation speed of the indoor motor has decreased to the minimum rotation speed threshold rmin, and at this time, the temperature value Tc of the indoor heat exchanger is still less than the first preset sterilization temperature value Tc1, the frequency of the compressor is controlled to increase, for example, the frequency of the compressor is increased successively according to F (n +1) ═ F (n) + Δ F, so as to increase the temperature value Tc of the indoor heat exchanger until the temperature value Tc of the indoor heat exchanger is greater than or equal to the first preset sterilization temperature value Tc1 and less than the second preset sterilization temperature value Tc2, that is, Tc1 is less than Tc < Tc2, so as to maintain the temperature value Tc of the indoor heat exchanger within the sterilization temperature interval. Wherein F (0) ═ F _ low.

In some embodiments, adjusting one or more of an on or off state of the outdoor ac motor, a rotational speed of the indoor 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 outdoor alternating current motor to be closed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

Specifically, the temperature value Tc of the indoor heat exchanger is greater than the second preset sterilization temperature threshold value Tc2, for example, Tc is 61 ℃ > 60 ℃, then the temperature value Tc of the indoor heat exchanger is considered to be high, at this time, the outdoor ac motor is controlled to be turned OFF, for example, the outdoor ac motor is controlled to be in an OFF state, so that the condensation temperature is rapidly reduced, at this time, the temperature value Tc of the indoor heat exchanger must be reduced to be smaller than the first preset sterilization temperature value Tc1, thereby avoiding that the temperature value Tc of the indoor heat exchanger is always greater than the second preset sterilization temperature threshold value Tc2, and improving the control of the temperature value Tc of the indoor heat exchanger.

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 until 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 until 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 cycle, for example, the outdoor ac motor is in the ON state in the previous detection cycle, the outdoor ac motor is kept in the ON state in the current cycle, and the outdoor ac motor is kept in the OFF state in the previous detection cycle.

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 a third 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, that is, the time that Tc is greater than or equal to Tc1 is accumulated, when the accumulated time reaches a third 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 the high-temperature self-cleaning sterilization control of the 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 33 ℃, 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 to the maximum opening degree by 500 steps from the current opening degree. And when the outdoor heat exchange temperature difference delta Tout is less than or equal to delta T which is equal to 3 ℃, entering a 3 rd stage, namely a high-temperature sterilization stage, controlling the air conditioner to heat, setting the temperature Ts which is equal to 50 ℃, and controlling the four-way valve to change direction. Meanwhile, the initial rotating speed of the indoor motor is stopped, the rotating speed of the indoor motor gradually increases to a low wind gear rotating speed r (0) ═ r _ L ═ 800rpm, and the air deflector is in a direct blowing prevention position. The outdoor ac motor is initially in the ON state, and the initial frequency of the compressor is F _ low ═ 35 Hz. And after the four-way valve is reversed for 2min, the temperature value Tc of the indoor heat exchanger is 58 ℃, and the ON state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are kept unchanged in a high-temperature sterilization temperature interval. After a plurality of the indoor heat exchangers are carried out for 5s, the temperature value Tc of the indoor heat exchanger is greater than 60 ℃ for the first time, and the outdoor alternating current motor is controlled to be in an OFF state; after a plurality of cycles, if Tc is between 57 ℃ and 60 ℃, keeping the outdoor alternating current motor in an OFF state, and if Tc is less than 56 ℃, keeping the outdoor alternating current motor 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 to the maximum opening degree by 500 steps from the current opening degree. And when the outdoor heat exchange temperature difference delta Tout is less than or equal to delta T which is equal to 3 ℃, entering a 3 rd stage, namely a high-temperature sterilization stage, controlling the air conditioner to heat, setting the temperature Ts which is equal to 50 ℃, and controlling the four-way valve to change direction. Meanwhile, the initial rotating speed of the indoor motor is stopped, the rotating speed of the indoor motor gradually increases to a low wind gear rotating speed r (0) ═ r _ L ═ 800rpm, and the air deflector is in a direct blowing prevention position. The outdoor alternating current motor is initially in an ON state, and the initial frequency of the compressor is F _ low ═ 35 Hz. And after the four-way valve is reversed for 2min, the temperature value Tc of the indoor heat exchanger is 52 ℃, and the ON state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are kept unchanged. After a plurality of detection cycles, for example, after a plurality of 5s, the temperature value Tc of the indoor heat exchanger is always less than 56 ℃ and Tc has no trend of rising, the rotation speed of the indoor motor is controlled to be reduced, r (1) -r (0) -100-800-700 rpm, the temperature value Tc of the indoor heat exchanger is increased, after a plurality of detection cycles, Tc-58 ℃ meets the temperature of the high-temperature sterilization zone, and the rotation speed of the indoor motor is r (n +1) -500 rpm. In the subsequent detection period, if the temperature value Tc of the indoor heat exchanger is always maintained between 57 ℃ and 60 ℃, the rotating speed of the indoor motor is kept unchanged at 500 rpm. 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 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 to the maximum opening degree by 500 steps from the current opening degree. And when the outdoor heat exchange temperature difference delta Tout is less than or equal to delta T which is equal to 3 ℃, entering a 3 rd stage, namely a high-temperature sterilization stage, controlling the air conditioner to heat, setting the temperature Ts which is equal to 50 ℃, and controlling the four-way valve to change direction. Meanwhile, the initial rotating speed of the indoor motor is stopped, the rotating speed of the indoor motor gradually increases to a low wind gear rotating speed r (0) ═ r _ L ═ 800rpm, and the air deflector is in a direct blowing prevention position. The outdoor alternating current motor is initially in an ON state, and the initial frequency of the compressor is F (0) ═ F _ low ═ 35 Hz. And after the four-way valve is reversed for 2min, the temperature value Tc of the indoor heat exchanger is 50 ℃, the outdoor alternating current motor is kept in an ON state, and the rotating speed of the indoor motor and the frequency of the compressor are kept unchanged. After 10s, the temperature value Tc of the indoor heat exchanger is 50 ℃, and R (2) is R (1) +50 is 650+50 is 700 rpm; after several test cycles, Tc is 52 ℃ < 56 ℃, when R (n +1) is 900rpm, which is already high R _ H. In a new detection period, Tc is 52 ℃ < 56 ℃, the indoor motor is controlled to be lowered, r (1) ═ r (0) -100-. And controlling the frequency of the compressor to rise in a subsequent new detection period, namely F (1) + F (0) + 5) + 35+5 to 40Hz, and adjusting the frequency once per period until the temperature value Tc of the indoor heat exchanger is controlled to be between 57 and 60 ℃. 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 first when a current environment meets a preset condition, control the air conditioner to refrigerate in the self-cleaning mode, and control the indoor motor to stop or operate at a rotation speed lower than a first preset rotation speed so as to quickly frost the indoor heat exchanger, and control the indoor motor to increase to a second preset rotation speed to operate when a frost exit condition is met, so as to maintain a temperature of the indoor heat exchanger within a preset temperature range, and at the same time, control the air deflector to be in a set position, control the compressor to operate at a preset frequency and at a maximum opening degree with the electronic expansion valve, and control the air conditioner to switch to a sterilization mode until a difference between a temperature value of the outdoor heat exchanger and an outdoor environment temperature value is smaller than a preset difference, wherein in the sterilization mode, the air conditioner comprises: controlling the air conditioner to heat, keeping the air deflector at the set position, simultaneously controlling an outdoor alternating current motor of the air conditioner to be started, an indoor motor to run at a third preset rotating speed, a compressor to run at a preset frequency and an electronic expansion valve to run at a preset initial opening degree, obtaining a temperature value of an indoor heat exchanger after running for a first preset time, and adjusting one or more of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor according to the temperature value of the indoor heat exchanger, wherein in the adjusting process, the priority for adjusting the on or off state of the outdoor alternating current motor is the highest, and the priority for adjusting the frequency of the compressor is the lowest.

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, the compressor is controlled to operate at the maximum opening degree at the preset frequency and the electronic expansion valve, so as to increase the evaporation pressure, reduce the condensation pressure and reduce the pressure of the refrigeration system until 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, controlling the air conditioner to switch to a sterilization mode, realizing non-stop switching between a self-cleaning mode and the sterilization mode, and reducing the total time of the continuous self-cleaning high-temperature sterilization function, thereby reducing invalid waiting time of a user, 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 frequency, acquiring a temperature value of the indoor heat exchanger after the air conditioner is operated for the first preset time, and adjusting one of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor according to a priority sequence, so that the temperature value of the indoor heat exchanger can meet the temperature requirement of high-temperature sterilization, controlling the frequency of the compressor to be at or above the lowest frequency during high-temperature sterilization, and correspondingly controlling the on or off state of the outdoor alternating current motor and the rotating speed of the indoor motor, 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 a first preset sterilization temperature value, control the outdoor ac motor to be kept on, so as to correspondingly increase the temperature value of the indoor heat exchanger; after the outdoor alternating current motor is kept started for the second preset time, when the temperature value of the indoor heat exchanger is always smaller than the first preset sterilization temperature value, the indoor motor is controlled to gradually reduce the rotating speed according to the preset step length on the basis of the third preset rotating speed so as to correspondingly increase the temperature value of the indoor heat exchanger.

In some embodiments, the control module 21 is further configured to, in the process of reducing the rotation speed of the indoor motor, when the temperature value of the indoor heat exchanger is increased to be greater than or equal to a first preset sterilization temperature value and smaller than a second preset sterilization temperature value, and the rotation speed of the indoor motor is greater than or equal to a minimum rotation speed threshold of the indoor motor at this time, control the indoor motor to operate according to the rotation speed of the indoor motor at this time.

In some embodiments, the control module 21 is further configured to, when the temperature value of the indoor heat exchanger is less than the first preset sterilization temperature value and the rotation speed of the indoor motor is reduced to the minimum rotation speed threshold of the indoor motor at this time, control the compressor to increase the frequency one by one based on the preset frequency according to the preset frequency increment 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 the second preset sterilization temperature value, control the outdoor ac motor to be turned off to correspondingly lower 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 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, 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 a third 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, that is, the time that Tc is greater than or equal to Tc1 is accumulated, when the accumulated time reaches a third 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 self-cleaning 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 details are not repeated here in order to reduce redundancy.

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 yes, the air conditioner is controlled to enter a self-cleaning mode, the air conditioner is controlled to refrigerate in the self-cleaning mode, 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 quickly frost, the indoor motor is controlled to be increased to a second preset rotating speed to operate when a frost-formation exit condition is met 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 operates at a 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, the outdoor alternating current motor is controlled to be started, the indoor motor is controlled to operate at a third preset rotating speed, the compressor operates at the preset frequency, the electronic expansion valve operates at a preset initial opening degree, a temperature value of the indoor heat exchanger is obtained after the outdoor alternating current motor operates for a first preset time, one or more of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, in the adjusting process, the priority for adjusting the on or off state of the outdoor alternating current motor is the highest, and the priority for adjusting the frequency of the compressor is the lowest.

2. The self-cleaning sterilization control method of an air conditioner according to claim 1, wherein said adjusting one or more of an on or off state of the outdoor ac motor, a rotation speed of the indoor motor, and a frequency of the compressor according to 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 outdoor alternating current motor to be closed so as to correspondingly reduce the temperature value of the indoor heat exchanger.

3. The self-cleaning sterilization control method of an air conditioner according to claim 2, 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 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 closed, and controlling the outdoor alternating current motor to be started again until 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 closed again until the temperature value of the indoor heat exchanger is larger 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.

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

if the temperature value of the indoor heat exchanger is smaller than a first preset sterilization temperature value, controlling the outdoor alternating current motor to be kept started so as to correspondingly increase the temperature value of the indoor heat exchanger;

after the outdoor alternating current motor is kept started for a second preset time, if the temperature value of the indoor heat exchanger is always smaller than the first preset sterilization temperature value, the indoor motor is controlled to gradually reduce the rotating speed according to a preset step length on the basis of the third preset rotating speed so as to correspondingly increase the temperature value of the indoor heat exchanger.

5. The self-cleaning sterilization control method of an air conditioner as claimed in claim 4, wherein said controlling said indoor motor to gradually decrease the rotation speed according to a preset step length based on said third preset rotation speed further comprises:

in the process of reducing the rotating speed of the indoor motor, if the temperature value of the indoor heat exchanger is increased to be greater than or equal to the first preset sterilization temperature value and less than the second preset sterilization temperature value, and the rotating speed of the indoor motor is greater than or equal to the minimum rotating speed threshold value of the indoor motor at the moment, the indoor motor is controlled to operate according to the rotating speed of the indoor motor at the moment.

6. The self-cleaning sterilization control method of an air conditioner according to claim 5, further comprising, in the process of reducing the rotation speed of the indoor motor:

and if the temperature value of the indoor heat exchanger is smaller than the first preset sterilization temperature value and the rotating speed of the indoor motor is reduced to the lowest rotating speed threshold value of the indoor motor at the moment, controlling the compressor to successively increase the frequency according to preset frequency increment on the basis of the preset 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 the second preset sterilization temperature value.

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 indoor heat exchanger with the temperature value larger than the first preset sterilization temperature value reaches a third 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 firstly enter a self-cleaning mode when the current environment meets a preset condition, controlling the air conditioner to refrigerate in the self-cleaning mode, controlling an indoor motor to stop or operate at a rotating speed lower than a first preset rotating speed so as to enable an indoor heat exchanger to quickly frost, controlling the indoor motor to be increased to a second preset rotating speed to operate when a frosting exit condition is met, so as to enable the temperature of the indoor heat exchanger to be maintained in a preset temperature range, and simultaneously controlling an air deflector to be in a set position, a compressor to be at a preset frequency and an electronic expansion valve to be at a maximum opening degree 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, and controlling the air conditioner to be switched to a sterilization mode, wherein the sterilization mode 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 of the air conditioner runs at a third preset rotating speed, a compressor runs at the preset frequency, the electronic expansion valve runs at a preset initial opening degree, a temperature value of an indoor heat exchanger is obtained after the air conditioner runs for a first preset time, one or more of the on or off state of the outdoor alternating current motor, the rotating speed of the indoor motor and the frequency of the compressor are adjusted according to the temperature value of the indoor heat exchanger, in the adjusting process, the priority for adjusting the on or off state of the outdoor alternating current motor is the highest, and the priority for adjusting the frequency of the compressor is the lowest.

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.