CN112577155B

CN112577155B - Control method of air conditioner, air conditioner and computer readable storage medium

Info

Publication number: CN112577155B
Application number: CN201910926110.3A
Authority: CN
Inventors: 牛成珂
Original assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2022-12-16
Anticipated expiration: 2039-09-27
Also published as: CN112577155A

Abstract

The application discloses a control method of an air conditioner, the air conditioner and a computer readable storage medium. The control method of the air conditioner comprises the following steps: and judging whether to execute the anti-frost mode or not according to the currently acquired temperature value and the temperature value acquired last time, and judging the running states of the compressor and the indoor side fan according to the temperature value acquired in the anti-frost mode. In the embodiment of the application, because according to the relation of the front and rear temperature values, the compressor and the indoor side fan are correspondingly controlled, the purposes of inhibiting the frosting of the indoor side evaporator and avoiding a large amount of liquid refrigerants to return to the compressor through the indoor side evaporator are achieved, and the operation reliability of the air conditioner and the use experience of a user are effectively improved.

Description

Control method of air conditioner, air conditioner and computer readable storage medium

Technical Field

The present disclosure relates to the field of air conditioners, and more particularly, to a method for controlling an air conditioner, an operation control device for an air conditioner, and a computer readable storage medium.

Background

When the indoor unit of the air conditioner is in a refrigeration mode, if the evaporator or the filter screen is dirty and blocked, the air outlet volume is reduced due to blocking of the air duct, under the condition, the heat exchange efficiency of the indoor unit and indoor air is poor, the evaporation effect of the evaporator in the indoor unit is poor, incomplete evaporation of liquid refrigerants in the evaporator is achieved, frosting of the evaporator due to the fact that the temperature of the evaporator is too low is prone to happening, the frosting of the evaporator is serious, the evaporation effect of the evaporator is poor, incomplete evaporation of more liquid refrigerants is achieved, the operation reliability of the evaporator is affected, a large amount of liquid refrigerants return to the compressor through the evaporator to damage the compressor, and the use experience of users is affected.

Disclosure of Invention

The present application is directed to solving, at least in part, one of the technical problems in the related art. Therefore, the application provides a control method of an air conditioner, an operation control device of the air conditioner, the air conditioner and a computer readable storage medium, which can improve the operation reliability of the air conditioner so as to improve the use experience of a user.

In a first aspect, an embodiment of the present application provides a method for controlling an air conditioner, including:

acquiring a temperature value of an indoor evaporator at intervals of a preset time period;

if the temperature value is currently acquired within a frost prevention temperature interval, and the temperature value is acquired last time and is greater than the upper limit value of the frost prevention temperature interval, executing a frost prevention mode, if the temperature value is acquired in the frost prevention mode and is within the frost prevention temperature interval, controlling the compressor to operate for a set time and then suspending operation, and controlling the indoor side fan to operate continuously.

According to the control method of the air conditioner, the temperature value of the indoor side evaporator is obtained at intervals of the preset time period, whether the anti-frost mode is executed or not is judged by combining the currently obtained temperature value and the temperature value obtained last time, after the anti-frost mode is executed, the subsequent processing operation is executed according to the temperature interval where the subsequently obtained temperature value is located, for example, if the temperature value obtained in the anti-frost mode is still in the anti-frost temperature interval, it is stated that the current anti-frost mode does not have enough capacity to inhibit frosting of the indoor side evaporator, therefore, the compressor is controlled to run for the set time and then is suspended, and the indoor side fan is controlled to run continuously. The compressor can make the air conditioner pause the refrigeration mode in pause operation to can restrain the indoor side evaporimeter and frosting, combine the continuous operation of indoor side fan, can improve the heat exchange of evaporimeter and air through the mode of air convection, improve the evaporation effect of the inside liquid refrigerant of indoor side evaporimeter, avoid appearing a large amount of liquid refrigerants and return to the compressor through the indoor side evaporimeter and lead to damaging the compressor, thereby can improve the operational reliability of air conditioner. In addition, before the compressor is operated in a pause mode, the compressor is firstly controlled to operate for a set time, so that the air conditioner can provide cold air for a user within a certain time before the compressor is operated in the pause mode, the use requirement of the user is met, discomfort of the user caused by directly stopping the compressor is avoided, and the use experience of the user can be improved.

Optionally, in an embodiment of the application, if the currently obtained temperature value is in an anti-frost temperature interval and the previously obtained temperature value is greater than an upper limit value of the anti-frost temperature interval, executing an anti-frost mode, if the temperature value obtained in the anti-frost mode is in the anti-frost temperature interval, controlling the compressor to operate for a set time and then to suspend operation, and controlling the indoor side fan to operate continuously, includes:

if the currently acquired temperature value is not greater than a first frost prevention threshold value and is greater than a second frost prevention threshold value, and the previously acquired temperature value is greater than the first frost prevention threshold value, controlling the compressor to reduce the working frequency to operate;

and if the compressor is controlled to reduce the working frequency to operate, the subsequently acquired temperature value is not greater than the first frost prevention threshold value and is not greater than the second frost prevention threshold value, the compressor is controlled to pause for a second time period every time the compressor operates for the first time period, and the indoor side fan is controlled to continuously operate.

Optionally, in an embodiment of the present application, the method further includes:

if the compressor is controlled to operate at a reduced working frequency, the temperature value acquired for the first time is not greater than a second frost prevention threshold and is greater than a third frost prevention threshold, and an indoor fan is controlled to increase the rotating speed and operate continuously;

in the process of controlling the indoor side fan to increase the rotating speed and continuously operate, one of the following operations is executed according to the subsequently acquired temperature value:

if the temperature value is not greater than the first frost prevention threshold value and is greater than the second frost prevention threshold value, controlling the compressor to pause for a second time length every time the compressor operates for the first time length;

and if the temperature value is not greater than the second frost prevention threshold and is greater than a third frost prevention threshold, controlling the compressor to operate for a third time and then suspending operation.

if the currently acquired temperature value is not greater than the second frost prevention threshold value and is greater than a third frost prevention threshold value, and the previously acquired temperature value is greater than the first frost prevention threshold value, controlling an indoor side fan to increase the rotating speed to operate;

after the indoor fan is controlled to operate at a higher rotating speed, one of the following operations is executed according to the subsequently acquired temperature value:

if the temperature value is not greater than the first frost prevention threshold value and is greater than the second frost prevention threshold value, controlling the compressor to operate at a reduced working frequency, if the temperature value is not greater than the first frost prevention threshold value and is greater than the second frost prevention threshold value after the compressor is controlled to operate at the reduced working frequency, controlling the compressor to pause for a second time period every first time period of operation, and controlling the indoor side fan to operate continuously;

if the temperature value all is not greater than the second frost prevention threshold value and is greater than the third frost prevention threshold value, control compressor reduction operating frequency operation, if control compressor reduction operating frequency operation back, the temperature value still is not greater than the second frost prevention threshold value and is greater than the third frost prevention threshold value, and the long back pause operation of time of control compressor operation third, and the continuous operation of control room inside fan.

if the currently acquired temperature value is not greater than the second frost prevention threshold value and is greater than a third frost prevention threshold value, and the previously acquired temperature value is greater than the first frost prevention threshold value, controlling the compressor to reduce the working frequency to operate, and controlling the indoor side fan to increase the rotating speed to operate;

after the compressor is controlled to operate at a reduced working frequency and the indoor side fan is controlled to operate at a raised rotating speed, one of the following operations is executed according to the subsequently acquired temperature value:

if the temperature value is not greater than the first frost prevention threshold value and is not greater than the second frost prevention threshold value, controlling the compressor to pause for a second time period every time the compressor operates for the first time period, and controlling the indoor side fan to operate continuously;

and if the temperature value is not greater than the second frost prevention threshold value and is greater than the third frost prevention threshold value, controlling the compressor to operate for a third time and then to pause, and controlling the indoor side fan to operate continuously.

Optionally, in an embodiment of the present application, in the process of controlling the compressor to pause for the second time period every time the compressor is operated for the first time period, if the temperature value is greater than the first frost prevention threshold, the compressor is controlled to operate at the original operating frequency.

Optionally, in an embodiment of the present application, after the compressor is controlled to operate for the third time period and then the compressor is suspended, if the temperature value is greater than the first frost prevention threshold, the compressor is controlled to operate at the original operating frequency.

Optionally, in an embodiment of the present application, in the process of controlling the compressor to pause for the second time period every time the first time period is operated, if the indoor side fan continues to operate for the fourth time period, the indoor side fan is controlled to operate at the original rotation speed.

and if the compressor is controlled to operate at the reduced working frequency, the subsequently acquired temperature value is greater than the first frost prevention threshold value, and the compressor is controlled to operate at the original working frequency.

and if the indoor side fan is controlled to operate at the increased rotating speed, the subsequently acquired temperature value is smaller than a third frost prevention threshold value, the compressor is controlled to stop operating, and the indoor side fan is controlled to operate continuously.

and if the currently acquired temperature value is smaller than the lower limit value of the frost prevention temperature interval, controlling the compressor to stop running and controlling the indoor side fan to continuously run.

Optionally, in an embodiment of the present application, the controlling of the compressor to stop operating is performed, and in a process of controlling an indoor side fan to continuously operate, if the temperature value is greater than a first frost prevention threshold, the compressor is controlled to operate at an original operating frequency.

and if the currently acquired temperature value is greater than the upper limit value of the frost prevention temperature interval, controlling the air conditioner to operate according to the original set parameters.

In a second aspect, an embodiment of the present application provides an operation control device for an air conditioner, including at least one control processor and a memory for communication connection with the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform the control method of the air conditioner as described above.

The operation control device of the air conditioner of the embodiment of the application acquires the temperature value of the indoor side evaporator through the interval preset time period, and combines the currently acquired temperature value and the temperature value acquired last time, judge whether to execute the anti-frost mode, after the anti-frost mode is executed, execute subsequent processing operation according to the temperature interval where the subsequently acquired temperature value is located, for example, if the temperature value acquired under the anti-frost mode is still in the anti-frost temperature interval, it is stated that the current anti-frost mode does not have enough capacity to restrain the frosting of the indoor side evaporator, therefore, the compressor is controlled to operate for a set time and then to pause, and the indoor side fan is controlled to operate continuously. The compressor can make the air conditioner pause the refrigeration mode in pause operation to can restrain the indoor side evaporimeter and frosting, combine the continuous operation of indoor side fan, can improve the heat exchange of evaporimeter and air through the mode of air convection, improve the evaporation effect of the inside liquid refrigerant of indoor side evaporimeter, avoid appearing a large amount of liquid refrigerants and return to the compressor through the indoor side evaporimeter and lead to damaging the compressor, thereby can improve the operational reliability of air conditioner. In addition, before the compressor of pause operation, control compressor operation earlier and set for duration for the air conditioner can also provide cold air to the user in a certain time before the pause operation, with satisfy user's use needs, avoid because directly stop the compressor and lead to the user to appear uncomfortable and feel, thereby can improve user's use and experience.

In a third aspect, an embodiment of the present application provides an air conditioner, including an indoor side evaporator, a compressor, an indoor side fan, a temperature sensor, and the operation control device as described above, where the temperature sensor is disposed in the indoor side evaporator, and the operation control device is electrically connected to the compressor, the indoor side fan, and the temperature sensor, respectively.

The air conditioner provided by the embodiment of the application acquires the temperature value of the indoor side evaporator at intervals of a preset time period, and judges whether the frost prevention mode is executed or not by combining the currently acquired temperature value and the temperature value acquired last time, and executes subsequent processing operation according to the temperature interval where the subsequently acquired temperature value is located after the frost prevention mode is executed. The compressor can make the air conditioner pause the refrigeration mode in pause operation to can restrain the indoor side evaporimeter and frosting, combine the continuous operation of indoor side fan, can improve the heat exchange of evaporimeter and air through the mode of air convection, improve the evaporation effect of the inside liquid refrigerant of indoor side evaporimeter, avoid appearing a large amount of liquid refrigerants and return to the compressor through the indoor side evaporimeter and lead to damaging the compressor, thereby can improve the operational reliability of air conditioner. In addition, before the compressor is operated in a pause mode, the compressor is firstly controlled to operate for a set time, so that the air conditioner can provide cold air for a user within a certain time before the compressor is operated in the pause mode, the use requirement of the user is met, discomfort of the user caused by directly stopping the compressor is avoided, and the use experience of the user can be improved.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the control method described above.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the present application.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention.

Fig. 1 is a schematic view of an operation control apparatus of an air conditioner according to an embodiment of the present application;

fig. 2 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present disclosure;

fig. 3 is a flowchart of a control method of an air conditioner according to another embodiment of the present disclosure;

fig. 4 is a flowchart of a control method of an air conditioner according to another embodiment of the present disclosure;

fig. 5 is a flowchart of a control method of an air conditioner according to another embodiment of the present disclosure;

fig. 6 is a flowchart of a control method of an air conditioner according to another embodiment of the present disclosure;

fig. 7 is a flowchart of a control method of an air conditioner according to another embodiment of the present disclosure;

fig. 8 is a flowchart of a control method of an air conditioner according to another embodiment of the present disclosure;

fig. 9 is a flowchart of a control method of an air conditioner according to another embodiment of the present application;

fig. 10 is a flowchart of a control method of an air conditioner according to another embodiment of the present disclosure;

fig. 11 is a flowchart of a control method of an air conditioner according to another embodiment of the present application;

fig. 12 is a flowchart of a control method of an air conditioner according to another embodiment of the present disclosure;

fig. 13 is a schematic diagram of an air conditioner according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that although functional block divisions are provided in the system drawings and logical orders are shown in the flowcharts, in some cases, the steps shown and described may be performed in different orders than the block divisions in the systems or in the flowcharts. The terms first, second and the like in the description and in the claims, and the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

At present, when the air conditioner indoor set is in the refrigeration mode, if dirty stifled takes place for evaporimeter or filter screen, can make the air output diminish because block the wind channel, under this condition, the heat exchange efficiency of indoor set and room air can worsen, thereby lead to the evaporation effect variation of evaporimeter in the indoor set, make liquid refrigerant evaporation incomplete in the evaporimeter, consequently appear easily because the evaporimeter temperature is low and lead to the evaporimeter to frost, and along with the evaporation frost is more serious, the evaporation effect of evaporimeter can become worse, consequently can lead to more liquid refrigerant evaporation incomplete, the operational reliability of evaporimeter has not only been influenced, still can lead to a large amount of liquid refrigerant to get back to the compressor through the evaporimeter and damage the compressor, thereby influence user's use and experience.

Based on this, the application provides a control method of an air conditioner, an operation control device of the air conditioner, the air conditioner and a computer readable storage medium, the temperature value of an indoor side evaporator is obtained at intervals of a preset time period, and whether a frost prevention mode is executed is judged by combining the currently obtained temperature value and the temperature value obtained at the previous time.

The embodiments of the present application will be further explained with reference to the drawings.

As shown in fig. 1, fig. 1 is a schematic diagram of an operation control device of an air conditioner according to an embodiment of the present application.

The operation control device of the embodiment of the application can be a device which is arranged inside the air conditioner or a device which is arranged outside the air conditioner; when the air conditioner includes an outdoor unit and an indoor unit, the operation control device may be disposed inside the outdoor unit or inside the indoor unit.

As shown in fig. 1, the operation control device 100 includes: one or more control processors 101 and memories 102, one control processor 101 and one memory 102 being illustrated in fig. 1.

The control processor 101 and the memory 102 may be connected by a bus or other means, and fig. 1 illustrates the connection by a bus as an example.

The memory 102, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer-executable programs. Further, the memory 102 may include high speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 102 may optionally include memory located remotely from the control processor 101, which may be connected to the operation control device 100 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Those skilled in the art will appreciate that the configuration of the apparatus shown in FIG. 1 does not constitute a limitation of the operation control apparatus 100, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.

In the operation control device 100 shown in fig. 1, the control processor 101 may be configured to call up a control program of the air conditioner stored in the memory 102, and perform the following steps:

and if the temperature value obtained at present is in the frost prevention temperature interval and the temperature value obtained at the previous time is greater than the upper limit value of the frost prevention temperature interval, executing the frost prevention mode, and if the temperature values obtained in the frost prevention mode are all in the frost prevention temperature interval, controlling the compressor to operate for a set time and then to suspend, and controlling the indoor side fan to operate continuously.

Further, still include:

And further, executing to control the compressor to stop running, and controlling the compressor to run at the original working frequency if the temperature value is greater than the first frost prevention threshold value in the process of controlling the indoor side fan to run continuously.

Further, still include:

Based on the hardware configuration of the operation control device 100, various embodiments of the control method of the air conditioner of the present application are proposed.

Referring to fig. 2, fig. 2 is a flowchart illustrating a control method of an air conditioner according to an embodiment of the present application, the control method including, but not limited to, the following steps:

and S100, acquiring a temperature value of the indoor side evaporator at intervals of a preset time period.

In an embodiment, the preset time period is not limited, and may be a default time period set when the product is shipped from a factory, or may be a time period set by a user, for example, the preset time period may be set to 2 minutes, or may be set to 5 minutes. Further, as will be understood by those skilled in the art, an indoor side evaporator refers to an evaporator inside the air conditioner facing indoors. When the air conditioner is a window air conditioner, the indoor side evaporator is an evaporator facing to the indoor side in the window air conditioner; when the air conditioner comprises an indoor unit and an outdoor unit, the indoor side evaporator is an evaporator inside the indoor unit. It can be understood that, when the temperature value of the indoor side evaporator is acquired at intervals of the preset time period, the temperature value can be acquired by installing a temperature sensor on the indoor side evaporator.

In an embodiment, the obtaining of the temperature value of the indoor side evaporator is not limited to obtaining the temperature value of a specific position of the indoor side evaporator, for example, the temperature value of a refrigerant inlet of the indoor side evaporator may be obtained, the temperature value of a middle portion of the indoor side evaporator may also be obtained, and the temperature value of a refrigerant outlet of the indoor side evaporator may also be obtained. In order to accurately obtain the overall temperature condition of the indoor side evaporator, the temperature value of the middle part of the indoor side evaporator can be selected and obtained. In addition, the temperature value of the indoor side evaporator can be confirmed in a number of different ways: for example, a plurality of sets of temperature values may be obtained each time, and the mode of the plurality of sets of temperature values is the temperature value of the indoor side evaporator; for another example, a plurality of sets of temperature values may be obtained each time, and an average value of the plurality of sets of temperature values is a temperature value of the indoor-side evaporator.

And S200, if the currently acquired temperature value is in the frost prevention temperature interval and the previously acquired temperature value is greater than the upper limit value of the frost prevention temperature interval, executing a frost prevention mode, if the temperature values acquired in the frost prevention mode are all in the frost prevention temperature interval, controlling the compressor to operate for a set time and then to suspend operation, and controlling the indoor side fan to operate continuously.

In an embodiment, the frost prevention temperature interval may be appropriately adjusted according to the current use environment, the use condition of the air conditioner, and the like, for example, the frost prevention temperature interval may be between 0 degree and 6 degrees, that is, if the temperature value of the indoor side evaporator is greater than 6 degrees, the indoor side evaporator will not be frosted; if the temperature value of the indoor side evaporator is between 0 and 6 degrees, the indoor side evaporator may frost at any time; if the temperature value of the indoor side evaporator is less than 0 degrees, the indoor side evaporator may be frosted. Therefore, necessary preconditions can be provided for subsequent accurate processing by judging whether the acquired temperature value is in the frost prevention temperature interval.

In an embodiment, if the currently acquired temperature value is within the anti-frost temperature range and the previously acquired temperature value is greater than the upper limit value of the anti-frost temperature range, the anti-frost mode is executed, so that the abnormal condition of the air conditioner can be avoided. The last temperature value of acquireing is greater than the upper limit value of frost prevention temperature interval, when explaining the last temperature value of acquireing, the air conditioner is in normal operating condition, if the temperature value of current acquireing is in frost prevention temperature interval, the condition of cooling has appeared in the indoor side evaporimeter of the air conditioner that has explained to be in normal operating condition, and the temperature value is in frost prevention temperature interval, indoor side evaporimeter probably frosts at any time, under this kind of condition, just carry out the frost prevention mode, thereby can be effectual, the frost is frosted to the indoor side evaporimeter of the pertinence suppression. If the air conditioner has already executed the anti-frost mode when the temperature value was obtained last time, and the air conditioner is triggered again to execute the anti-frost mode when the temperature value was obtained at present, an operation error may be caused on the control logic, which easily causes an abnormal problem of the air conditioner. Therefore, by combining the temperature interval in which the currently acquired temperature value is judged and the temperature interval in which the previously acquired temperature value is judged, the subsequent operation can be accurately executed, and the abnormality of the air conditioner caused by the control logic error is avoided.

In an embodiment, the anti-frost mode may have a plurality of different embodiments, and the different embodiments may be correspondingly adopted according to the type and the use condition of the air conditioner. For example, the frost prevention mode may be a compressor down-conversion operation, and the compressor down-conversion operation may reduce a flow rate of a liquid refrigerant inside the evaporator, so as to avoid incomplete evaporation of the liquid refrigerant, thereby avoiding frosting due to an excessively low temperature of the evaporator. If the frost prevention mode is the operation of increasing the rotating speed of the fan, the operation of increasing the rotating speed of the fan can accelerate the air flow on the surface of the evaporator, so that the heat exchange between the evaporator and the air can be improved, the temperature of the evaporator can be increased, and the frosting caused by the over-low temperature of the evaporator is avoided. For another example, the frost prevention mode may be a down-conversion operation of the compressor and an operation of the fan at a higher rotation speed, and the compressor and the fan are matched to better inhibit the evaporator from frosting. In this embodiment, if the temperature values obtained in the frost prevention mode are all within the frost prevention temperature range, it is described that the current frost prevention mode does not have enough capacity to suppress frosting of the indoor side evaporator, and in order to effectively suppress frosting of the indoor side evaporator, the operation of the compressor is controlled to be suspended for a set time, and the indoor side fan is controlled to continuously operate. The compressor of pause operation can make the air conditioner pause refrigeration mode, avoid the refrigerant to reduce the temperature of indoor side evaporimeter, thereby can restrain indoor side evaporimeter frosting, in addition, combine the continuous operation of indoor side fan, can improve the heat exchange of evaporimeter and air through the mode of air convection, improve the inside liquid refrigerant's of indoor side evaporimeter evaporation effect, avoid appearing a large amount of liquid refrigerants and return to the compressor and lead to damaging the compressor through indoor side evaporimeter, thereby can improve the operational reliability of air conditioner. In addition, before the compressor of pause operation, control compressor operation earlier and set for duration for the air conditioner can also provide cold air to the user in a certain time before the pause operation, with satisfy user's use needs, avoid because directly stop the compressor and lead to the user to appear uncomfortable and feel, thereby can improve user's use and experience. In addition, before the operation of the compressor is suspended, the set time length of the operation of the compressor may be a default time length set when the product is shipped from a factory, or may also be a time length set by a user.

Therefore, in an embodiment of the control method of the air conditioner as shown in fig. 2, the temperature value of the indoor side evaporator is obtained at intervals of a preset time period, and the currently obtained temperature value and the temperature value obtained last time are combined to determine whether to execute the anti-frost mode, and after the anti-frost mode is executed, the subsequent processing operation is executed according to the temperature interval where the subsequently obtained temperature value is located. If the temperature value obtained in the frost prevention mode is still in the frost prevention temperature interval, it is indicated that the current frost prevention mode does not have enough capacity to inhibit frosting of the indoor side evaporator, so that the compressor is controlled to operate for a set time period and then is suspended, and the indoor side fan is controlled to operate continuously. The pause running compressor can make the air conditioner pause the refrigeration mode to can restrain the indoor side evaporimeter and frosting, combine the continuous operation of indoor side fan, can improve the heat exchange of evaporimeter and air through the mode of air convection, improve the inside liquid refrigerant's of indoor side evaporimeter evaporation effect, avoid appearing a large amount of liquid refrigerants and return to the compressor and lead to damaging the compressor through the indoor side evaporimeter, thereby can improve the operational reliability of air conditioner. In addition, before the compressor of pause operation, control compressor operation earlier and set for duration for the air conditioner can also provide cold air to the user in a certain time before the pause operation, with satisfy user's use needs, avoid because directly stop the compressor and lead to the user to appear uncomfortable and feel, thereby can improve user's use and experience.

Another embodiment of the present application further provides a control method of an air conditioner, as shown in fig. 3, fig. 3 is a schematic diagram of an embodiment of a detailed flow of step S200 in fig. 2, where the step S200 includes but is not limited to:

step S210, if the currently acquired temperature value is not greater than a first frost prevention threshold value and is greater than a second frost prevention threshold value, and the previously acquired temperature value is greater than the first frost prevention threshold value, controlling the compressor to reduce the working frequency to operate;

and step S211, if the compressor is controlled to operate at the reduced working frequency, the subsequently acquired temperature values are not greater than the first frost prevention threshold value and are not greater than the second frost prevention threshold value, the compressor is controlled to pause for a second time period every time the compressor operates for the first time period, and the indoor side fan is controlled to continuously operate.

In one embodiment, the first frost prevention threshold is an upper limit value of the frost prevention temperature interval; the second frost prevention threshold may be a middle value or a lower limit value of the frost prevention temperature range, and may be selected according to an actual use condition. The temperature value obtained last time is larger than the first frost prevention threshold value, namely the temperature value obtained last time is larger than the upper limit value of the frost prevention temperature interval, and the air conditioner is in a normal operation state when the temperature value is obtained last time. If the temperature value of acquireing at present is not more than first frost prevention threshold value and is greater than the second frost prevention threshold value, it states that the temperature value of acquireing at present is in the frost prevention temperature interval, has explained the condition of cooling has appeared in the indoor side evaporimeter of the air conditioner that is in normal operating condition to the temperature value is in the frost prevention temperature interval, and indoor side evaporimeter probably frosts at any time, under this condition, control compressor reduces the operating frequency operation, carries out the frost prevention mode promptly, thereby can be effectual, the frost formation of indoor side evaporimeter of pertinence suppression. The temperature value of the indoor side evaporator is acquired at intervals of a preset time period, so that the judging mechanism can accurately control the air conditioner to execute the anti-frost mode, and the situation that the air conditioner is repeatedly triggered to execute the anti-frost mode under the condition that the temperature value acquired at the current time and the temperature value acquired at the current time are both between the first anti-frost threshold and the second anti-frost threshold can be effectively avoided.

In one embodiment, after the compressor is controlled to operate at a reduced operating frequency, i.e., after the anti-frost mode is performed, the temperature of the indoor side evaporator may be increased, but may also be maintained or decreased. If the temperature rises, the indoor side evaporator cannot frost; if the temperature is maintained, the indoor side evaporator is likely to frost; if the temperature drops, the indoor evaporator may frost. For different temperature conditions, different subsequent operations are required to be performed for corresponding processing, and therefore, after the compressor is controlled to operate at a reduced operating frequency, different operations are required to be correspondingly performed according to subsequently acquired temperature values. If the subsequently acquired temperature value is not greater than the first frost prevention threshold value and is greater than the second frost prevention threshold value, the frost prevention mode does not have enough capacity to inhibit the indoor side evaporator from frosting, the indoor side evaporator can frosting at any time, in order to avoid the situation, the compressor is controlled to be temporarily stopped for the first time period and operated for the second time period, and the indoor side fan is controlled to be continuously operated. When the first time length pause operation second of control compressor every operation, can make the compressor interval operation, avoid the compressor to move always and lead to the continuous incomplete evaporation of liquid refrigerant, avoid the liquid refrigerant to the continuous cooling of indoor side evaporator and lead to the indoor side evaporator frosting, in addition, combine the continuous operation of indoor side fan, can improve the heat exchange efficiency of indoor side evaporator and air through the mode of air convection, improve the evaporation effect of the inside liquid refrigerant of indoor side evaporator, avoid appearing a large amount of liquid refrigerants and return to the compressor through the indoor side evaporator and lead to damaging the compressor, thereby can improve the operational reliability of air conditioner. In addition, the compressor is operated at intervals, so that the compressor is operated for the first time interval and is suspended for the second time interval every time, the air conditioner can be kept to provide cold air for a user under the condition of ensuring that frosting is inhibited, the use requirement of the user is met, the user is prevented from being uncomfortable due to the fact that the compressor is directly stopped, and the use experience of the user can be improved. In this embodiment, the first duration and the second duration are not limited to fixed durations, and the first duration and the second duration may be default durations set by a product when the product leaves a factory, or durations set by a user. Under general conditions, the first time length is longer than the second time length, so that the air conditioner can be guaranteed to have enough time to run and refrigerate, the use experience of a user can be met, and the air conditioner can have time to pause refrigeration to inhibit the indoor side evaporator from frosting.

To illustrate by a specific example, assuming that the first anti-frost threshold is set to 6 degrees, the second anti-frost threshold is set to 2 degrees, the temperature value obtained last time is 7 degrees, and the temperature value obtained currently is 4 degrees, then, when the temperature value of the indoor side evaporator is obtained last time, the air conditioner is in a normal operation state, and when the temperature value of the indoor side evaporator is obtained currently, it is detected that the temperature value of the indoor side evaporator falls from 7 degrees to 4 degrees and is between the first anti-frost threshold and the second anti-frost threshold, at this time, the air conditioner is switched from the normal operation state to the anti-frost mode. In this case, the compressor is operated at a reduced operating frequency, and the frost formation of the indoor side evaporator is suppressed by appropriately reducing the cooling capacity of the air conditioner. After the compressor reduces the operating frequency and operates, if the temperature value of the indoor side evaporator that follow-up acquireed all fluctuates between 2 degrees to 6 degrees, that is to say under the present circumstances, just by reducing the operating frequency of compressor and not enough restraining indoor side evaporator frosting, indoor side evaporator probably frosts at any time, at this moment, control compressor operation 1 hour pause operation 5 minutes of every, and the indoor side fan lasts the operation, at this moment, the air conditioner can keep providing cold air for the user in 1 hour, in order to guarantee user's use experience, and after the compressor operation 1 hour, the air conditioner pauses refrigeration 5 minutes, make indoor side evaporator time heat up thereby restrain frosting. The compressor is operated at certain time intervals, so that the operation reliability of the air conditioner can be improved, and the use experience of a user can be improved.

Therefore, in an embodiment of the control method shown in fig. 3, the compressor and the indoor side fan can be correspondingly controlled according to the relationship between the front and rear temperature values, so that the compressor can operate at a certain time interval, thereby achieving the purposes of suppressing frosting of the indoor side evaporator, avoiding a large amount of liquid refrigerant from returning to the compressor through the indoor side evaporator, and effectively improving the operation reliability of the air conditioner and the user experience.

Another embodiment of the present application further provides a control method of an air conditioner, as shown in fig. 4, where fig. 4 is a schematic diagram of another embodiment of a detailed flow of step S200 in fig. 2, and the embodiment shown in fig. 4 is different from the embodiment shown in fig. 3 in that: after the compressor is controlled to operate at the reduced working frequency, the subsequently acquired temperature values are different, so that the executed subsequent operations are different. In this embodiment, the step S200 includes, but is not limited to:

step S212, if the compressor is controlled to operate at a reduced working frequency, the temperature value acquired for the first time is not greater than a second frost prevention threshold and is greater than a third frost prevention threshold, and the indoor side fan is controlled to increase the rotating speed and operate continuously;

and S213, controlling the indoor side fan to increase the rotating speed and continuously operate, and controlling the compressor to pause for a second time length every time the compressor operates for the first time length if the temperature value is not greater than the first frost prevention threshold and is greater than the second frost prevention threshold.

In an embodiment, after the compressor is controlled to operate at the reduced operating frequency, that is, after the anti-frost mode is executed, the temperature value obtained for the first time is not greater than the second anti-frost threshold and is greater than the third anti-frost threshold, which indicates that the temperature of the indoor side evaporator still decreases after the compressor is controlled to operate at the reduced operating frequency, that is, the current anti-frost mode does not have enough capacity to suppress frosting of the indoor side evaporator, and in order to ensure the capability of suppressing frosting of the indoor side evaporator, the indoor side fan is controlled to increase the rotation speed and operate continuously. The control room inner side fan increases the rotational speed and continuously operates, can increase the mobility of air to can improve the heat exchange efficiency of indoor side evaporator and air, thereby further improve the evaporation effect of the inside liquid refrigerant of indoor side evaporator, avoid appearing a large amount of liquid refrigerants and return the compressor through indoor side evaporator and lead to damaging the compressor, thereby can improve the operational reliability of air conditioner. When the indoor side fan is controlled to increase the rotating speed and continuously operate, the temperature of the indoor side evaporator may still be increased, maintained or reduced, and in order to effectively inhibit frosting of the indoor side evaporator, a subsequent temperature value needs to be further monitored, so that in the process of controlling the indoor side fan to increase the rotating speed and continuously operate, if the temperature value is not greater than a first frost prevention threshold and is greater than a second frost prevention threshold, the compressor is controlled to pause for a second time period every first time period of operation. After the indoor side fan is controlled to increase the rotating speed and continuously operate, the obtained temperature value is not greater than the first frost prevention threshold value and is greater than the second frost prevention threshold value, the condition that the temperature of the indoor side evaporator is increased is explained, namely, the operation of the compressor at the reduced working frequency and the operation of the indoor side fan at the increased rotating speed and continuously operate are combined, the evaporation effect of liquid refrigerant in the indoor side evaporator can be improved, however, the temperature of the indoor side evaporator is still in the frost prevention temperature range, in order to avoid the condition that the indoor side evaporator is likely to frost, the compressor is further controlled to pause for a second time length every time when the compressor operates for the first time length, therefore, the operation of the compressor at the reduced working frequency, the operation of the indoor side fan at the increased rotating speed and continuously operate and the operation of the compressor at intervals, the frosting of the indoor side evaporator can be effectively inhibited, and the phenomenon that a large amount of liquid refrigerant returns to the compressor through the indoor side evaporator to cause damage to the compressor can be avoided, and the operation reliability of the air conditioner is effectively improved. In addition, the compressor is operated at intervals, so that the compressor is operated for the first time interval and is suspended for the second time interval every time, the air conditioner can be kept to provide cold air for a user under the condition of ensuring that frosting is inhibited, the use requirement of the user is met, the user is prevented from being uncomfortable due to the fact that the compressor is directly stopped, and the use experience of the user can be improved.

To illustrate by a specific example, assuming that the first frost prevention threshold is set to 6 degrees, the second frost prevention threshold is set to 2 degrees, the third frost prevention threshold is set to 0 degree, the temperature value obtained last time is 7 degrees, and the temperature value obtained currently is 4 degrees, then, when the temperature value of the indoor side evaporator is obtained last time, the air conditioner is in a normal operation state, and when the temperature value of the indoor side evaporator is obtained currently, it is detected that the temperature value of the indoor side evaporator falls from 7 degrees to 4 degrees, and is between the first frost prevention threshold and the second frost prevention threshold, at this time, the air conditioner is switched to the frost prevention mode from the normal operation state. In this case, the compressor is operated at a reduced operating frequency, and the indoor-side evaporator is suppressed from frosting by appropriately reducing the cooling capacity of the air conditioner. After the compressor reduces the operating frequency operation, the temperature value that obtains for the first time is 1 degree, and the temperature value of indoor side evaporimeter falls 1 degree from 4 degrees promptly, is in between second frost prevention threshold value and the third frost prevention threshold value, at this moment, in order to avoid indoor side evaporimeter frosting, the control room inside fan improves the rotational speed and continuously operates, combines the improvement rotational speed and the continuously operating of the reduction operating frequency operation of compressor and indoor side fan, restraines indoor side evaporimeter frosting. And in the process of controlling the indoor side fan to increase the rotating speed and continuously operate, the temperature value obtained subsequently fluctuates between 2 and 6 degrees, namely the temperature of the indoor side evaporator is increased, but still within the frost prevention temperature interval, which indicates that the frost inhibition capacity of the indoor side evaporator is improved, but the possibility of frost inhibition cannot be completely separated, therefore, the compressor is controlled to operate for 5 minutes in a suspension manner every 1 hour, at the moment, the air conditioner can keep providing cold air for a user within 1 hour, so as to ensure the use experience of the user, and after the compressor operates for 1 hour, the air conditioner suspends refrigeration for 5 minutes, so that the indoor side evaporator has time to increase the temperature so as to inhibit frost formation. The compressor is operated at certain time intervals, so that the operation reliability of the air conditioner can be improved, and the use experience of a user can be improved.

Therefore, in an embodiment of the control method shown in fig. 4, the compressor and the indoor side fan can be correspondingly controlled according to a relationship between the front and rear temperature values, so that the compressor can operate at a certain time interval, and the indoor side fan can increase the rotating speed and continuously operate, thereby achieving the purposes of suppressing the frosting of the indoor side evaporator and avoiding a large amount of liquid refrigerant from returning to the compressor through the indoor side evaporator, and effectively improving the operation reliability of the air conditioner and the user experience.

Another embodiment of the present application further provides a control method of an air conditioner, as shown in fig. 5, fig. 5 is a schematic diagram of another embodiment of a detailed flow of step S200 in fig. 2, and the embodiment shown in fig. 5 is different from the embodiment shown in fig. 4 in that: in the process of controlling the indoor side fan to increase the rotating speed and continuously operate, the subsequently obtained temperature values are different, so that the executed subsequent operation is different. In this embodiment, the step S200 includes, but is not limited to:

and S214, controlling the indoor side fan to increase the rotating speed and continuously operate, and if the temperature value is not more than the second frost prevention threshold and is more than a third frost prevention threshold, controlling the compressor to operate for a third time and then suspending operation.

In an embodiment, in step S214, in the process of controlling the indoor side fan to increase the rotation speed and continuously operate, if the temperature value is not greater than the second frost prevention threshold and is greater than the third frost prevention threshold, it is stated that increasing the rotation speed of the indoor side fan still cannot effectively suppress frosting of the indoor side evaporator under the condition that the operating frequency of the compressor is reduced, the temperature of the indoor side evaporator is in a reduced state, the probability of frosting of the indoor side evaporator is greatly increased, and at this time, to avoid frosting of the indoor side evaporator, the compressor is controlled to operate for the third duration and then to suspend operation. Because the temperature of the indoor side evaporator is lower at present, the temperature of the indoor side evaporator cannot be increased by the current treatment, and the operation of operating the compressor at intervals cannot play a role in effectively inhibiting frosting, the compressor is controlled to be operated for the third time and then is stopped, and the aim of preventing the frosting degree of the indoor side evaporator from being aggravated in the subsequent operation of the compressor is fulfilled by stopping the operation of the compressor. In addition, before the compressor is suspended, the air conditioner can be kept to provide cold air for a user, so that the use requirement of the user is met, the discomfort of the user caused by directly stopping the compressor is avoided, and the use experience of the user can be improved.

In an embodiment, since the temperature value of the indoor side evaporator is between the second frost prevention threshold and the third frost prevention threshold, and the indoor side evaporator at this time is lower in the frost inhibition capability than the indoor side evaporator at this time whose temperature value is between the first frost prevention threshold and the second frost prevention threshold, before the compressor is temporarily stopped, the third time period of the compressor operation is shorter than the first time period, and then the indoor side evaporator can be effectively inhibited from frosting. In the present embodiment, it is preferable that the third period of time is half the first period of time.

To illustrate by a specific example, assuming that the first frost prevention threshold is set to 6 degrees, the second frost prevention threshold is set to 2 degrees, the third frost prevention threshold is set to 0 degree, the temperature value obtained last time is 7 degrees, and the temperature value obtained currently is 4 degrees, then, when the temperature value of the indoor side evaporator is obtained last time, the air conditioner is in a normal operation state, and when the temperature value of the indoor side evaporator is obtained currently, it is detected that the temperature value of the indoor side evaporator falls from 7 degrees to 4 degrees, and is between the first frost prevention threshold and the second frost prevention threshold, at this time, the air conditioner is switched to the frost prevention mode from the normal operation state. In this case, the compressor is operated at a reduced operating frequency, and the indoor-side evaporator is suppressed from frosting by appropriately reducing the cooling capacity of the air conditioner. After the compressor reduces the operating frequency operation, the temperature value that obtains for the first time is 1 degree, and the temperature value of indoor side evaporimeter falls 1 degree from 4 degrees promptly, is in between second frost prevention threshold value and the third frost prevention threshold value, at this moment, in order to avoid indoor side evaporimeter frosting, the control room inside fan improves the rotational speed and continuously operates, combines the improvement rotational speed and the continuously operating of the reduction operating frequency operation of compressor and indoor side fan, restraines indoor side evaporimeter frosting. And in the process of controlling the indoor side fan to increase the rotating speed and continuously operate, the subsequently acquired temperature value is still kept to fluctuate between 0 and 2 degrees, namely, the temperature of the indoor side evaporator is reduced, which indicates that the indoor side evaporator in the current state does not have enough frosting inhibition capacity, so that the compressor is controlled to operate for 30 minutes and then to pause, at the moment, the air conditioner can keep providing cold air for the user within 30 minutes to ensure the use experience of the user, and when the compressor operates for 30 minutes, the air conditioner pauses to operate, so that the indoor side evaporator has time to heat up to inhibit frosting.

Therefore, in an embodiment of the control method as shown in fig. 5, the compressor and the indoor side fan can be correspondingly controlled according to a relationship between the front and rear temperature values, so that the compressor can be kept running for a certain time before the operation is suspended, and the indoor side fan can be rotated at a higher speed and run continuously, thereby achieving the purposes of suppressing the frosting of the indoor side evaporator and avoiding a large amount of liquid refrigerant from returning to the compressor through the indoor side evaporator, and effectively improving the running reliability of the air conditioner and the user experience.

Another embodiment of the present application further provides a control method of an air conditioner, as shown in fig. 6, fig. 6 is a schematic diagram of another embodiment of a detailed flow of step S200 in fig. 2, and the embodiment shown in fig. 6 is different from the embodiment shown in fig. 3 in that: the currently acquired temperature values are different, resulting in different subsequent operations being performed. In this embodiment, the step S200 includes, but is not limited to:

step S220, if the currently acquired temperature value is not greater than a second frost prevention threshold value and is greater than a third frost prevention threshold value, and the previously acquired temperature value is greater than a first frost prevention threshold value, controlling an indoor fan to increase the rotating speed to operate;

and step S221, after the indoor side fan is controlled to operate at the increased rotating speed, if the temperature value is not greater than the first frost prevention threshold value and is greater than the second frost prevention threshold value, the compressor is controlled to operate at the reduced working frequency, if the temperature value is not greater than the first frost prevention threshold value and is greater than the second frost prevention threshold value, the compressor is controlled to pause for a second time period every time the compressor operates for the first time period, and the indoor side fan is controlled to operate continuously.

In an embodiment, when the temperature value obtained last time is greater than the first frost prevention threshold, if the temperature value obtained last time is not greater than the second frost prevention threshold and is greater than the third frost prevention threshold, it indicates that the indoor side evaporator may frost at any time, and therefore, the indoor side fan is controlled to operate at a higher rotation speed, and the heat exchange efficiency between the indoor side evaporator and the air is improved by increasing the convection of the air, so as to achieve the purpose of suppressing the frosting of the indoor side evaporator.

In one embodiment, in step S221, a temperature value after the indoor side fan is controlled to operate at a higher rotation speed is detected, and the air conditioner is controlled to correspondingly perform a suitable processing operation according to the temperature value. After the indoor side fan of control improves the rotational speed operation, if the temperature value all is not greater than first frost prevention threshold value and is greater than the second frost prevention threshold value, explain after the rotational speed that improves indoor side fan, the temperature of indoor side evaporimeter has obtained the promotion, the effect of the suppression frost of certain degree has been played, nevertheless because the temperature of indoor side evaporimeter still is in the frost prevention temperature interval, the indoor side evaporimeter still has the possibility of frosting, in order to avoid the frost condition that indoor side evaporimeter probably appears, the control compressor reduces the operating frequency operation, in order to further improve the suppression frost formation ability of indoor side evaporimeter. After the compressor is controlled to operate at a reduced working frequency, the temperature value is still not greater than the first frost prevention threshold and is still not greater than the second frost prevention threshold, namely, the problem that the indoor side evaporator frosts still cannot be completely solved by combining the improvement of the rotating speed of the indoor side fan and the reduction of the working frequency of the compressor in the current state is solved, therefore, the compressor is controlled to be operated for the second time length when the compressor is operated for the first time length, the indoor side fan is controlled to operate continuously, the frosting inhibition capacity of the indoor side evaporator is further improved, the compressor is operated for the second time length when the compressor is operated for the first time length at intervals, under the condition that the frosting inhibition is guaranteed, the air conditioner is kept to provide cold air for a user, the use requirement of the user is met, discomfort of the user caused by directly stopping the compressor is avoided, and the use experience of the user can be improved.

To illustrate by a specific example, assuming that the first frost prevention threshold is set to 6 degrees, the second frost prevention threshold is set to 2 degrees, the third frost prevention threshold is set to 0 degree, the temperature value obtained last time is 7 degrees, and the temperature value obtained currently is 1 degree, then, when the temperature value of the indoor side evaporator is obtained last time, the air conditioner is in a normal operation state, and when the temperature value of the indoor side evaporator is obtained currently, it is detected that the temperature value of the indoor side evaporator falls from 7 degrees to 1 degree, and is between the second frost prevention threshold and the third frost prevention threshold, at this time, the air conditioner is switched to the frost prevention mode from the normal operation state. Under the condition, the indoor side fan is controlled to operate at a higher rotating speed, and the aim of inhibiting the indoor side evaporator from frosting is fulfilled by increasing the convection of air. After the rotating speed of the indoor side fan is increased, the obtained temperature value is 4 degrees, namely the temperature value of the indoor side evaporator is increased to 4 degrees from 1 degree and is located between the first frost prevention threshold value and the second frost prevention threshold value, the indoor side evaporator has the frosting inhibition capacity to a certain degree, and at the moment, the compressor is controlled to reduce the working frequency to operate so as to further improve the frosting inhibition capacity of the indoor side evaporator. After the compressor is controlled to operate at the reduced working frequency, the obtained temperature value fluctuates between 2 and 6 degrees, the compressor is controlled to pause for 5 minutes every 1 hour of operation, and the indoor side fan is controlled to continuously operate. At this time, the air conditioner can keep providing cool air for the user within 1 hour to ensure the user experience, and after the compressor operates for 1 hour, the air conditioner suspends the refrigeration for 5 minutes, so that the indoor side evaporator has time to heat up to suppress the frosting. The compressor is operated at certain time intervals, so that the operation reliability of the air conditioner can be improved, and the use experience of a user can be improved.

Therefore, in an embodiment of the control method as shown in fig. 6, the compressor and the indoor side fan can be correspondingly controlled according to a relationship between the front temperature value and the rear temperature value, so that the compressor can operate at a certain time interval, and the indoor side fan can increase the rotating speed and continuously operate, thereby achieving the purposes of inhibiting the indoor side evaporator from frosting and avoiding a large amount of liquid refrigerant from returning to the compressor through the indoor side evaporator, and effectively improving the operation reliability of the air conditioner and the use experience of a user.

Another embodiment of the present application further provides a control method of an air conditioner, as shown in fig. 7, fig. 7 is a schematic diagram of another embodiment of a detailed flow of step S200 in fig. 2, and the embodiment shown in fig. 7 is different from the embodiment shown in fig. 6 in that: after the fan in the control room is operated at a higher rotating speed, the obtained temperature values are different, and the subsequent operation executed is different. In this embodiment, the step S200 includes, but is not limited to:

step S222, after the indoor side fan is controlled to operate at the increased rotating speed, if the temperature value is not greater than the second frost prevention threshold value and is not greater than the third frost prevention threshold value, the compressor is controlled to operate at the reduced working frequency, if the compressor is controlled to operate at the reduced working frequency, the temperature value is not greater than the second frost prevention threshold value and is not greater than the third frost prevention threshold value, the compressor is controlled to operate for the third time period and then to pause, and the indoor side fan is controlled to operate continuously.

In an embodiment, in step S222, after the indoor side fan is controlled to operate at the increased rotation speed, if the temperature value is not greater than the second frost prevention threshold and not greater than the third frost prevention threshold, it is indicated that increasing the rotation speed of the indoor side fan only enables the temperature of the indoor side evaporator to be maintained in the current temperature range, and frosting of the indoor side evaporator cannot be effectively suppressed. After the control compressor reduces the operating frequency operation, the temperature value is still not greater than the second frost prevention threshold value and is greater than the third frost prevention threshold value, explained under current status, combine to improve the rotational speed of indoor side fan and reduce the operating frequency of compressor, the temperature that only can maintain indoor side evaporator can not produce too big jump fluctuation, can not solve the problem that indoor side evaporator frosted, in order to avoid the condition that indoor side evaporator frosted to appear, the long back pause operation of long back of control compressor operation third, and control indoor side fan continuous operation. The frosting degree of the indoor evaporator can be avoided aggravating in the subsequent operation by the compressor in the pause operation, and before the compressor is operated in the pause operation, the compressor is controlled to operate for the third time, the air conditioner can be kept to provide cold air for the user, the use requirement of the user is met, the user is prevented from being uncomfortable due to the fact that the compressor is directly stopped, and the use experience of the user can be improved.

To illustrate by a specific example, assuming that the first frost prevention threshold is set to 6 degrees, the second frost prevention threshold is set to 2 degrees, the third frost prevention threshold is set to 0 degree, the temperature value obtained last time is 7 degrees, and the temperature value obtained currently is 1 degree, then, when the temperature value of the indoor side evaporator is obtained last time, the air conditioner is in a normal operation state, and when the temperature value of the indoor side evaporator is obtained currently, it is detected that the temperature value of the indoor side evaporator falls from 7 degrees to 1 degree, and is between the second frost prevention threshold and the third frost prevention threshold, at this time, the air conditioner is switched to the frost prevention mode from the normal operation state. Under the condition, the indoor side fan is controlled to operate at a higher rotating speed, and the aim of inhibiting the indoor side evaporator from frosting is fulfilled by increasing the convection of air. After the rotating speed of the indoor side fan is increased, the obtained temperature value is 1.5 degrees, the temperature value of the indoor side evaporator is still between the second frost prevention threshold value and the third frost prevention threshold value, and at the moment, the compressor is controlled to reduce the working frequency to operate, so that the frosting inhibition capacity of the indoor side evaporator is improved. After the compressor is controlled to operate at the reduced working frequency, the obtained temperature value still fluctuates between 0 and 2 degrees, the compressor is controlled to operate for 30 minutes, then the operation is suspended, and the indoor side fan is controlled to operate continuously. At this time, the air conditioner can keep providing cool air for the user within 30 minutes to ensure the user experience, and after the compressor operates for 30 minutes, the air conditioner suspends operation so that the indoor side evaporator has time to heat up to suppress frosting.

Therefore, in an embodiment of the control method shown in fig. 7, the compressor and the indoor side fan can be correspondingly controlled according to a relationship between the front temperature value and the rear temperature value, so that the compressor can be kept running for a certain time before the operation is suspended, and the indoor side fan can be rotated at a higher speed and run continuously, thereby achieving the purposes of inhibiting the indoor side evaporator from frosting, avoiding a large amount of liquid refrigerant from returning to the compressor through the indoor side evaporator, and effectively improving the running reliability of the air conditioner and the use experience of a user.

Another embodiment of the present application further provides a control method of an air conditioner, as shown in fig. 8, where fig. 8 is a schematic diagram of another embodiment of a detailed flow of step S200 in fig. 2, and the embodiment shown in fig. 8 is different from the embodiment shown in fig. 6 in that: and when the currently acquired temperature value is between the second frost prevention threshold and the third frost prevention threshold, executing different subsequent operations. In this embodiment, the step S200 includes, but is not limited to:

step S230, if the currently acquired temperature value is not greater than the second frost prevention threshold value and is greater than a third frost prevention threshold value, and the previously acquired temperature value is greater than the first frost prevention threshold value, controlling the compressor to reduce the working frequency to operate, and controlling the indoor side fan to increase the rotating speed to operate;

and S231, after the compressor is controlled to operate at the reduced working frequency and the indoor side fan is controlled to operate at the increased rotating speed, if the temperature value is not greater than the first frost prevention threshold value and is not greater than the second frost prevention threshold value, the compressor is controlled to pause for a second time every time the compressor operates for the first time, and the indoor side fan is controlled to operate continuously.

In an embodiment, under the condition that the temperature value obtained last time is greater than the first frost prevention threshold, if the temperature value obtained at present is not greater than the second frost prevention threshold and is greater than the third frost prevention threshold, the compressor is controlled to reduce the working frequency to operate, the indoor side fan is controlled to increase the rotating speed to operate, and the heat exchange efficiency between the indoor side evaporator and the air is improved by reducing the refrigerating capacity of the air conditioner and increasing the convection of the air, so as to achieve the purpose of inhibiting the indoor side evaporator from frosting.

In an embodiment, after the compressor is controlled to operate at a reduced operating frequency and the indoor side fan is controlled to operate at an increased rotating speed, if the temperature value is not greater than the first frost prevention threshold and greater than the second frost prevention threshold, it is described that in the current state, the rotating speed of the indoor side fan is increased and the operating frequency of the compressor is reduced in a combined manner, although the temperature of the indoor side evaporator can be increased to a certain extent, the problem of frosting of the indoor side evaporator cannot be completely solved, therefore, the compressor is controlled to operate for the second time period when the compressor operates for the first time period, and the indoor side fan is controlled to operate continuously, so that the frosting inhibition capability of the indoor side evaporator is further increased, and the compressor is operated for the second time period when the compressor operates for the first time period when the compressor operates at intervals, under the condition that frosting inhibition is guaranteed, the air conditioner is kept to provide cold air to a user, the use requirement of the user is met, and discomfort of the user caused by directly stopping the compressor is avoided, so that the use experience of the user can be improved.

To illustrate by a specific example, assuming that the first frost prevention threshold is set to 6 degrees, the second frost prevention threshold is set to 2 degrees, the third frost prevention threshold is set to 0 degree, the temperature value obtained last time is 7 degrees, and the temperature value obtained currently is 1 degree, then, when the temperature value of the indoor side evaporator is obtained last time, the air conditioner is in a normal operation state, and when the temperature value of the indoor side evaporator is obtained currently, it is detected that the temperature value of the indoor side evaporator falls from 7 degrees to 1 degree, and is between the second frost prevention threshold and the third frost prevention threshold, at this time, the air conditioner is switched to the frost prevention mode from the normal operation state. In this case, the compressor is controlled to operate at a reduced operating frequency, and the indoor fan is controlled to operate at an increased rotational speed, thereby achieving the purpose of suppressing the frost formation of the indoor evaporator by reducing the cooling capacity of the air conditioner and increasing the convection of air. After the compressor is controlled to reduce the operating frequency operation and the indoor fan is controlled to improve the rotating speed operation, the obtained temperature value is 4 degrees, namely the temperature value of the indoor evaporator is increased to 4 degrees from 1 degree, the indoor evaporator is located between a first frost prevention threshold and a second frost prevention threshold, the indoor evaporator has the inhibition frosting capacity of a certain degree, but the problem that the indoor evaporator frosts cannot be completely solved, therefore, the compressor is controlled to be in pause operation for 5 minutes every 1 hour, and the indoor fan is controlled to continuously operate. At this time, the air conditioner can keep providing cool air for the user within 1 hour to ensure the user experience, and after the compressor runs for 1 hour, the air conditioner suspends the refrigeration for 5 minutes, so that the indoor side evaporator has time to heat up to inhibit the frosting. The compressor is operated at certain time intervals, so that the operation reliability of the air conditioner can be improved, and the use experience of a user can be improved.

Therefore, in an embodiment of the control method shown in fig. 8, the compressor and the indoor side fan can be correspondingly controlled according to a relationship between the front and rear temperature values, so that the compressor can operate at a certain time interval, and the indoor side fan can increase the rotation speed and continuously operate, thereby achieving the purposes of suppressing the frosting of the indoor side evaporator and avoiding a large amount of liquid refrigerant from returning to the compressor through the indoor side evaporator, and effectively improving the operation reliability of the air conditioner and the user experience.

Another embodiment of the present application further provides a control method of an air conditioner, as shown in fig. 9, where fig. 9 is a schematic diagram of another embodiment of a detailed flow of step S200 in fig. 2, and the embodiment shown in fig. 9 is different from the embodiment shown in fig. 8 in that: after the compressor is controlled to operate at a reduced working frequency and the indoor side fan is controlled to operate at a high rotating speed, the obtained temperature values are different, so that the subsequent operation is different. In this embodiment, the step S200 includes, but is not limited to:

step S230, if the currently acquired temperature value is not greater than the second frost prevention threshold value and is greater than a third frost prevention threshold value, and the previously acquired temperature value is greater than the first frost prevention threshold value, controlling the compressor to operate at a reduced working frequency, and controlling the indoor fan to operate at a raised rotating speed;

and step S232, after the compressor is controlled to operate at the reduced working frequency and the indoor fan is controlled to operate at the increased rotating speed, if the temperature value is not greater than the second frost prevention threshold value and is not greater than the third frost prevention threshold value, the compressor is controlled to operate for a third time and then to pause, and the indoor fan is controlled to operate continuously.

In an embodiment, in step S232, after the compressor is controlled to operate at the reduced operating frequency and the indoor fan is controlled to operate at the increased rotating speed, if the temperature value is not greater than the second frost prevention threshold and greater than the third frost prevention threshold, that is, it is described that in the current state, the rotating speed of the indoor fan is increased and the operating frequency of the compressor is reduced in combination, the temperature of the indoor evaporator can be maintained without too large jump fluctuation, the problem of frost formation of the indoor evaporator cannot be solved, in order to avoid the frost formation of the indoor evaporator, the compressor is controlled to operate for the third time and then to suspend operation, and the indoor fan is controlled to operate continuously. The frosting degree of the indoor evaporator can be avoided aggravating in the subsequent operation by the compressor in the pause operation, and before the compressor is operated in the pause operation, the compressor is controlled to operate for the third time, the air conditioner can be kept to provide cold air for the user, the use requirement of the user is met, the user is prevented from being uncomfortable due to the fact that the compressor is directly stopped, and the use experience of the user can be improved.

To illustrate by a specific example, assuming that the first frost prevention threshold is set to 6 degrees, the second frost prevention threshold is set to 2 degrees, the third frost prevention threshold is set to 0 degree, the temperature value obtained last time is 7 degrees, and the temperature value obtained currently is 1 degree, then, when the temperature value of the indoor side evaporator is obtained last time, the air conditioner is in a normal operation state, and when the temperature value of the indoor side evaporator is obtained currently, it is detected that the temperature value of the indoor side evaporator falls from 7 degrees to 1 degree, and is between the second frost prevention threshold and the third frost prevention threshold, at this time, the air conditioner is switched to the frost prevention mode from the normal operation state. Under the condition, the compressor is controlled to operate at a reduced working frequency, the indoor side fan is controlled to operate at a higher rotating speed, and the purpose of inhibiting the frosting of the indoor side evaporator is achieved by reducing the refrigerating capacity of the air conditioner and increasing the convection of air. After the compressor is controlled to reduce the operating frequency operation and control the indoor fan to improve the rotational speed operation, the temperature value of acquireing is 1.5 degrees, the temperature value of indoor side evaporimeter still is in between second frost prevention threshold value and the third frost prevention threshold value, the temperature of indoor side evaporimeter does not produce too big jump fluctuation promptly, indoor side evaporimeter still has great frosting risk, consequently, the operation of suspending after the control compressor operation 30 minutes, and the indoor fan of control continues the operation. At this time, the air conditioner can keep providing cool air for the user within 30 minutes to ensure the user experience, and after the compressor operates for 30 minutes, the air conditioner suspends operation so that the indoor side evaporator has time to heat up to suppress frosting.

Therefore, in an embodiment of the control method as shown in fig. 9, the compressor and the indoor side fan can be correspondingly controlled according to a relationship between the front and rear temperature values, so that the compressor can be kept running for a certain time before the operation is suspended, and the indoor side fan can be rotated at a higher speed and run continuously, thereby achieving the purposes of suppressing the frosting of the indoor side evaporator and avoiding a large amount of liquid refrigerant from returning to the compressor through the indoor side evaporator, and effectively improving the running reliability of the air conditioner and the user experience.

Another embodiment of the present application further provides a control method of an air conditioner, as shown in fig. 10, where the control method embodiment in fig. 10 is one of the following method steps of the control method embodiment in fig. 3, the control method embodiment in fig. 4, the control method embodiment in fig. 6, or the control method embodiment in fig. 8, and in this embodiment, the following method steps include, but are not limited to:

and step S300, in the process of controlling the compressor to pause for a second time period every time the compressor is operated for the first time period, if the temperature value is greater than a first frost prevention threshold value, controlling the compressor to operate at the original working frequency.

In an embodiment, during the process of controlling the compressor to pause for the second time period every first time period, as in the control method embodiment in fig. 3 or the control method embodiment in fig. 4 or the control method embodiment in fig. 6 or the control method embodiment in fig. 8, the compressor is in the state of operating at the reduced operating frequency, and during the process of operating the compressor for the first time period every second time period, if the temperature value is greater than the first frost prevention threshold value, it is said that the temperature of the indoor side evaporator is raised and is in the normal operating temperature range, in the current state, the problem of frosting does not occur in the indoor side evaporator, and therefore, the compressor is controlled to operate at the original operating frequency, the cooling capacity of the air conditioner is recovered, so as to meet the use needs of the user, and improve the use experience of the user.

Another embodiment of the present application further provides a control method of an air conditioner, as shown in fig. 11, the control method embodiment in fig. 11 is one of the following method steps of the control method embodiment in fig. 5, the control method embodiment in fig. 7, or the control method embodiment in fig. 9, and in this embodiment, the following method steps include but are not limited to:

and step S400, after the compressor is controlled to operate for the third time and then is suspended, if the temperature value is greater than the first frost prevention threshold value, the compressor is controlled to operate at the original working frequency.

In an embodiment, after the compressor is controlled to operate for the third time period and then to be operated in a pause state, the compressor is in the pause state, if the temperature value is greater than the first frost prevention threshold value, that is, when the compressor is operated in the pause state, the temperature of the indoor side evaporator is increased, and the indoor side evaporator is in a normal working temperature interval.

Another embodiment of the present application further provides a control method of an air conditioner, as shown in fig. 12, the control method embodiment in fig. 12 is one of the following method steps of the control method embodiment in fig. 4, the control method embodiment in fig. 6, or the control method embodiment in fig. 8, and in this embodiment, the following method steps include but are not limited to:

and S500, in the process of controlling the compressor to pause for a second time period when the compressor operates for the first time period, if the indoor side fan continuously operates for a fourth time period, controlling the indoor side fan to operate at the original rotating speed.

In an embodiment, during the process of controlling the compressor to operate for the second time period of the first time period of the pause operation, as in the control method embodiment in fig. 4 or the control method embodiment in fig. 6 or the control method embodiment in fig. 8, the indoor side fan is in the state of operating at the increased speed, and during the process of controlling the compressor to operate for the second time period of the first time period of the pause operation, the temperature of the indoor side evaporator is maintained between the first frost prevention threshold and the second frost prevention threshold, which indicates that the indoor side evaporator has a certain frost formation inhibition capability, and in this case, the indoor side evaporator has only a small possibility of frost formation, therefore, if the indoor side fan continues to operate for the fourth time period, the compressor still operates for the first time period every second time period, i.e., it indicates that the temperature of the indoor side evaporator is maintained in a relatively stable temperature interval, at this time, it is not necessary to maintain the indoor side fan to operate at the increased speed, and in order to reduce the power consumption, the indoor side fan may be controlled to operate at the original speed.

In an embodiment, the fourth duration is not limited to a fixed duration, and the fourth duration may be a default duration set by the product when the product leaves the factory, or a duration set by the user.

Another embodiment of the present application further provides a control method of an air conditioner, where after the indoor side fan is controlled to operate at a higher rotation speed, a subsequently obtained temperature value is smaller than a third frost prevention threshold, the compressor is controlled to stop operating, and the indoor side fan is controlled to operate continuously.

In an embodiment, if the indoor side fan is controlled to operate at a higher rotation speed, a subsequently acquired temperature value is smaller than a third frost prevention threshold value, which indicates that the current frost prevention treatment does not work, the temperature of the indoor side evaporator is already in a frosting temperature range, and the compressor is controlled to stop operating in order to avoid deepening the frosting degree of the indoor side evaporator. Although the compressor stop motion, nevertheless because the temperature of indoor side evaporimeter is lower, consequently still control indoor side fan and continue the operation, make indoor side fan can continue toward carrying cold wind outward in the definite time, in order to satisfy user's needs, simultaneously, make the air last convection current through indoor side fan, in order to improve the heat exchange efficiency of indoor side evaporimeter and air, thereby make the temperature of indoor side evaporimeter promote, realize the frost prevention to indoor side evaporimeter and handle.

Another embodiment of the present application further provides a control method of an air conditioner, wherein if a currently acquired temperature value is smaller than a lower limit value of a frost prevention temperature interval, the compressor is controlled to stop operating, and an indoor side fan is controlled to continuously operate.

In an embodiment, if the temperature value obtained last time is greater than the first frost prevention threshold value and the temperature value obtained at present is less than the lower limit value of the frost prevention temperature interval, it is indicated that the temperature of the indoor side evaporator is in a rapidly decreased state, if the temperature value is not processed in time, the indoor side evaporator is seriously frosted, and even a large amount of liquid refrigerant returns to the compressor through the indoor side evaporator to damage the compressor, so that the compressor is controlled to stop running. Although the compressor stop motion, nevertheless because the temperature of indoor side evaporimeter is lower, consequently still control indoor side fan and continue the operation, make indoor side fan can continue toward carrying cold wind outward in the definite time, in order to satisfy user's needs, simultaneously, make the air last convection current through indoor side fan, in order to improve the heat exchange efficiency of indoor side evaporimeter and air, thereby make the temperature of indoor side evaporimeter promote, realize the frost prevention to indoor side evaporimeter and handle.

Another embodiment of the present application further provides a control method of an air conditioner, which is implemented to control a compressor to stop operating, and control the compressor to operate at an original operating frequency if a temperature value is greater than a first frost prevention threshold value in a process of controlling an indoor side fan to operate continuously.

In an embodiment, when the temperature of indoor side evaporimeter is low excessively, in order to avoid deepening the frosting of indoor side evaporimeter or prevent that indoor side evaporimeter frosting, control compressor stall, and control indoor side fan continuously operates, after the compressor stall, and at the in-process of indoor side fan continuously operation, if the temperature value is greater than first frost prevention threshold value, explain the stall compressor and keep indoor side fan continuously operating can play good frost prevention effect, the temperature of indoor side evaporimeter consequently obtains promoting, and the temperature of indoor side evaporimeter has promoted normal operating temperature interval, so, in order to guarantee user's use needs, the control compressor is with former operating frequency operation, guarantee the normal refrigeration effect of air conditioner, thereby improve user's use experience.

Another embodiment of the present application further provides a control method of an air conditioner, where if a currently acquired temperature value is greater than an upper limit value of a frost prevention temperature interval, the air conditioner is controlled to operate according to an original set parameter.

In an embodiment, if the temperature value obtained last time is greater than the first frost prevention threshold value and the temperature value obtained currently is greater than the upper limit value of the frost prevention temperature interval, that is, the temperature value obtained currently is also greater than the first frost prevention threshold value, it is indicated that the temperature of the indoor side evaporator does not fall into the frost prevention temperature interval and the current indoor side evaporator does not frost, so that the air conditioner is controlled to operate according to the original set parameters to ensure the use requirements of users. Furthermore, as will be appreciated by those skilled in the art, the air conditioner operates according to original setting parameters, which include, but are not limited to, one or more of a temperature setting parameter, a wind speed setting parameter, an operation time setting parameter, an air outlet direction setting parameter, and an operation mode setting parameter, and the original setting parameters represent the user's preference when using the air conditioner.

Referring to fig. 13, another embodiment of the present application further provides an air conditioner, the air conditioner 200 includes an indoor side evaporator 201, a compressor 202, an indoor side fan 203, a temperature sensor 204, and the operation control device 100 as in any of the above embodiments, the temperature sensor 204 is disposed on the indoor side evaporator 201, and the operation control device 100 is electrically connected to the compressor 202, the indoor side fan 203, and the temperature sensor 204, respectively.

In one embodiment, the temperature sensor 204 may be attached to different locations of the indoor side evaporator 201. For example, the temperature sensor 204 may be attached to the refrigerant inlet of the indoor side evaporator 201; for another example, the temperature sensor 204 may be attached to the middle of the indoor side evaporator 201; for another example, the temperature sensor 204 may be attached to the refrigerant outlet of the indoor side evaporator 201. In addition, the number of the temperature sensors 204 may be one or more, and the specific number is not limited. When the number of the temperature sensors 204 is one, the temperature sensor 204 is preferably attached to the middle of the indoor side evaporator 201, so that the temperature value obtained by the temperature sensor 204 can be relatively close to the overall temperature of the indoor side evaporator 201. When the number of the temperature sensors 204 is plural, the plural temperature sensors 204 may be attached to different positions of the indoor side evaporator 201, and therefore, the plural temperature sensors 204 can simultaneously acquire plural temperature values, and then the current temperature value of the indoor side evaporator 201 may be determined according to a mode, an average value, a maximum value, a minimum value, or the like of the plural temperature values.

Since the air conditioner 200 in this embodiment has the operation control device 100 in any of the embodiments, the air conditioner 200 in this embodiment has the hardware structure of the operation control device 100 in the embodiments, and the control processor 101 in the operation control device 100 can call the control program of the air conditioner stored in the memory 102 to implement the control method for the air conditioner 200.

Furthermore, an embodiment of the present application also provides a computer-readable storage medium storing computer-executable instructions, which are executed by one or more control processors, for example, by one control processor 101 in fig. 1, and can cause the one or more control processors 101 to execute the control method of the air conditioner in the above-described method embodiment, for example, execute the above-described method steps S100 to S200 in fig. 2, the method steps S210 to S211 in fig. 3, the method steps S210 to S213 in fig. 4, the method steps S210 to S214 in fig. 5, the method steps S220 to S221 in fig. 6, the method steps S220 to S222 in fig. 7, the method steps S230 to S231 in fig. 8, and the method steps S230 to S232 in fig. 9.

The above described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the claims.

Claims

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

if the temperature value obtained at present is in the frost prevention temperature interval and the temperature value obtained at the previous time is greater than the upper limit value of the frost prevention temperature interval, executing a frost prevention mode, if the temperature values obtained in the frost prevention mode are all in the frost prevention temperature interval, controlling the compressor to operate for a set time and then to suspend operation, and controlling the indoor side fan to operate continuously;

wherein, if the present temperature value that acquires is in the frost prevention temperature interval, and the last time acquisition the temperature value is greater than the upper limit value of frost prevention temperature interval, carries out the frost prevention mode, if acquire under the frost prevention mode the temperature value all is in the frost prevention temperature interval, control compressor operation pause operation after setting for duration, and the control room inside fan continuously operates, include:

if the temperature value obtained currently is not greater than a first frost prevention threshold value and is greater than a second frost prevention threshold value, and the temperature value obtained last time is greater than the first frost prevention threshold value, controlling the compressor to reduce the working frequency to operate;

after the indoor side fan is controlled to operate at a rotating speed, one of the following operations is executed according to the subsequently acquired temperature value:

if the temperature value is not greater than the first frost prevention threshold value and is greater than the second frost prevention threshold value, controlling the compressor to operate at a reduced working frequency, if the temperature value is not greater than the first frost prevention threshold value and is greater than the second frost prevention threshold value after the compressor is controlled to operate at the reduced working frequency, controlling the compressor to pause for a second time every time the compressor operates for the first time, and controlling the indoor side fan to operate continuously;

if the temperature value is not greater than the second frost prevention threshold value and is greater than a third frost prevention threshold value, controlling the compressor to reduce the working frequency to operate, if the temperature value is not greater than the second frost prevention threshold value and is greater than the third frost prevention threshold value after the compressor is controlled to reduce the working frequency to operate, controlling the compressor to operate for a third time and then suspending operation, and controlling the indoor side fan to operate continuously;

wherein the third duration is shorter than the first duration.

2. The control method according to claim 1, wherein if the currently obtained temperature value is not greater than a first frost prevention threshold and is greater than a second frost prevention threshold, and the previously obtained temperature value is greater than the first frost prevention threshold, after the compressor is controlled to operate at the reduced operating frequency, if the currently obtained temperature value is in a frost prevention temperature interval and the previously obtained temperature value is greater than an upper limit value of the frost prevention temperature interval, the frost prevention mode is executed, if the temperature values obtained in the frost prevention mode are all in the frost prevention temperature interval, the compressor is controlled to operate for a set time period and then to suspend operation, and the indoor side fan is controlled to operate continuously, further comprising:

3. The control method according to claim 2, wherein if the currently obtained temperature value is not greater than a first frost prevention threshold and is greater than a second frost prevention threshold, and the previously obtained temperature value is greater than the first frost prevention threshold, after controlling the compressor to operate at the reduced operating frequency, the control method further comprises:

in the process of controlling the indoor fan to increase the rotating speed and continuously operate, one of the following operations is executed according to the subsequently acquired temperature value:

4. The control method according to claim 1, wherein the performing a frost prevention mode if the currently acquired temperature value is within a frost prevention temperature range and the previously acquired temperature value is greater than an upper limit value of the frost prevention temperature range, and controlling the compressor to stop operating after a set time period and controlling the indoor side fan to continuously operate if the temperature values acquired in the frost prevention mode are within the frost prevention temperature range includes:

if the currently acquired temperature value is not greater than a second frost prevention threshold value and is greater than a third frost prevention threshold value, and the previously acquired temperature value is greater than a first frost prevention threshold value, controlling the compressor to operate at a reduced working frequency, and controlling the indoor fan to operate at a raised rotating speed;

after the compressor is controlled to operate at a reduced working frequency and the indoor fan is controlled to operate at a raised rotating speed, one of the following operations is executed according to the subsequently acquired temperature value:

and if the temperature value is not greater than the second frost prevention threshold value and is not greater than the third frost prevention threshold value, controlling the compressor to operate for a third time and then to pause, and controlling the indoor side fan to operate continuously.

5. The control method according to any one of claims 2 to 4, wherein in the process of controlling the compressor to pause for the second time period every first time period, if the temperature value is greater than the first frost prevention threshold value, the compressor is controlled to operate at the original operating frequency.

6. The control method according to any one of claims 3 to 4, wherein after the compressor is controlled to operate for the third time period and then the operation is suspended, if the temperature value is greater than the first frost prevention threshold value, the compressor is controlled to operate at the original operating frequency.

7. The control method according to any one of claims 3 to 4, wherein during the process of controlling the compressor to pause for the second time period every first time period, if the indoor side fan continues to operate for the fourth time period, the indoor side fan is controlled to operate at the original rotation speed.

8. An operation control device of an air conditioner is characterized by comprising at least one control processor and a memory which is in communication connection with the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform the control method of any one of claims 1 to 7.

9. An air conditioner, comprising an indoor side evaporator, a compressor, an indoor side fan, a temperature sensor and the operation control device according to claim 8, wherein the temperature sensor is disposed in the indoor side evaporator, and the operation control device is electrically connected to the compressor, the indoor side fan and the temperature sensor, respectively.

10. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the control method according to any one of claims 1 to 7.