WO2019158087A1

WO2019158087A1 - Self-cleaning control method for air conditioner

Info

Publication number: WO2019158087A1
Application number: PCT/CN2019/074970
Authority: WO
Inventors: 许文明; 王飞
Original assignee: 青岛海尔空调器有限总公司
Priority date: 2018-02-14
Filing date: 2019-02-13
Publication date: 2019-08-22
Also published as: CN108131801B; CN108131801A

Abstract

The present invention relates to the technical field of air conditioners, and aims to solve a problem in the prior art in which an air conditioner performs determination based on a single condition, namely a current value of a fan in an indoor unit, and as a result is likely to frequently perform self-cleaning operations due to erroneous determination. Provided is a self-cleaning control method for an air conditioner comprising an indoor unit, comprising: when the air conditioner is performing a cooling operation, acquiring a temperature of a coil in the indoor unit and a dew point temperature of air; acquiring multiple current values of a fan in the indoor unit within a preset time period; performing calculation to obtain an average value of the multiple current values of the fan in the indoor unit; and determining, according to the temperature of the coil in the indoor unit, the dew point temperature of air and the average value, whether to cause the indoor unit to perform a self-cleaning operation. The present invention enables an air conditioner to perform self-cleaning operations under reasonable conditions both when there is condensation and when there is not condensation, and can prevent the air conditioner from wasting energy.

Description

Self-cleaning control method for air conditioner

Technical field

The invention belongs to the technical field of air conditioners, and in particular provides a self-cleaning control method for an air conditioner.

Background technique

The air conditioner is a device capable of cooling/heating indoors. As time goes by, the dust on the indoor unit and the outdoor unit of the air conditioner will gradually increase, and the accumulation of ash will breed a large amount of bacteria, especially indoors. When the air flows through the indoor unit, it will carry a lot of dust and bacteria, so it is necessary to clean the air conditioner in time.

In the prior art, the cleaning method of the air conditioner includes manual cleaning and self-cleaning of the air conditioner. It is time-consuming and labor-intensive to use manual cleaning. It is necessary to disassemble and clean the various components of the air conditioner, and the components need to be re-cleaned after the cleaning is completed. Assembled. Therefore, many air conditioners of the present invention have adopted a self-cleaning method. For example, a method of self-cleaning control of an air conditioner is disclosed in the patent of CN107525209A. Specifically, the control method includes detecting the current operation mode of the air conditioner. The current operating mode of the air conditioner is the uncooled mode, and the air conditioner is adjusted to the cooling mode; the speed of the motor of the indoor unit fan of the air conditioner and the first current value of the motor at the speed are detected; the first current of the motor at the speed is detected The value is compared with the first preset current value at the rotational speed. If the first current value is less than or equal to the first preset current value, the self-cleaning mode of the air conditioner is turned on, and the self-cleaning process of the indoor heat exchanger is performed. That is to say, in the above patent, it is determined whether the self-cleaning of the indoor unit is performed by the fan current of the indoor unit. However, during the cooling operation of the air conditioner, the indoor opportunity of the air conditioner generates condensation, and the indoor unit The condensation will affect the fan current of the indoor unit, that is, the indoor unit condensation will reduce the fan current of the indoor unit. Therefore, if the single-condition of the indoor unit fan current is judged, the current reduction of the indoor unit cannot be determined. Whether it is due to the condensation of the air conditioner or the ash formation of the air conditioner. If the air conditioner is only caused by the condensation of the indoor unit, the fan current of the indoor unit is lowered, then the indoor unit may be unashed. The air conditioner still cleans the indoor unit, which causes waste of energy. From this, it can be seen that the self-cleaning mode is frequently performed by the air conditioner due to the single condition of the fan current of the indoor unit of the air conditioner.

Therefore, there is a need in the art for a new self-cleaning control method for an air conditioner to solve the above problems.

Summary of the invention

In order to solve the above problems in the prior art, in order to solve the problem that the existing air conditioner passes the single condition of the indoor unit fan current, it is easy to cause the air conditioner to frequently perform the self-cleaning mode due to misjudgment, and the present invention provides a use. In the self-cleaning control method of the air conditioner, the air conditioner includes an indoor unit, and the self-cleaning control method includes: acquiring the coil temperature of the indoor unit and the dew point temperature of the air during the cooling operation of the air conditioner; acquiring the indoor unit within the preset time The plurality of fan current values; calculating an average value of the plurality of fan current values of the indoor unit; determining whether to perform the self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value.

In the preferred technical solution of the self-cleaning control method described above, the step of "determining whether to perform the self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value" includes: if the coil temperature of the indoor unit Below the dew point temperature of the air, the rate of change of the average value with respect to the standard current value is compared with the first preset value; based on the comparison result, it is determined whether the self-cleaning mode is performed on the indoor unit.

In a preferred technical solution of the self-cleaning control method described above, the step of “determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result” includes: if the rate of change of the average value with respect to the standard current value is greater than the first preset value, Perform self-cleaning mode on the indoor unit.

In a preferred technical solution of the self-cleaning control method described above, the step of “determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result” further includes: if the average rate of change with respect to the standard current value is not greater than the first preset value , the self-cleaning mode is not performed on the indoor unit.

In the preferred technical solution of the self-cleaning control method described above, the step of "determining whether to perform the self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value" includes: if the coil temperature of the indoor unit If the dew point temperature is greater than or equal to the air, the rate of change of the average value with respect to the standard current value is compared with the second preset value; and according to the comparison result, it is determined whether the self-cleaning mode is performed on the indoor unit.

In a preferred technical solution of the above self-cleaning control method, the step of “determining whether to perform a self-cleaning mode on the indoor unit according to the comparison result” includes: if the rate of change of the average value with respect to the standard current value is greater than the second preset value, Perform self-cleaning mode on the indoor unit.

In a preferred technical solution of the above self-cleaning control method, the step of “determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result” further includes: if the average rate of change with respect to the standard current value is not greater than the second preset value , the self-cleaning mode is not performed on the indoor unit.

In the preferred technical solution of the self-cleaning control method described above, the step of "determining whether to perform the self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value" includes: if the coil temperature of the indoor unit Less than the dew point temperature of the air, the average value of the average of three consecutive preset times is compared with the first preset value; if the average of three consecutive preset times is relative to the standard current value If the rate of change is greater than the first preset value, performing a self-cleaning mode on the indoor unit; if at least one of the average values of the average of the three preset time periods relative to the standard current value is not greater than the first preset value , the self-cleaning mode is not performed on the indoor unit, and the change rate of the average value of the next three consecutive preset time periods with respect to the standard current value is continuously compared with the first preset value, and then according to the comparison result, it is determined whether The indoor unit performs a self-cleaning mode.

In the preferred technical solution of the self-cleaning control method described above, the step of "determining whether to perform the self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value" includes: if the coil temperature of the indoor unit If the dew point temperature is greater than or equal to the air, the rate of change of the average of the three preset time periods relative to the standard current value is compared with the second preset value; if the average value of the three consecutive preset times is relative to the standard If the rate of change of the current value is greater than the second preset value, the self-cleaning mode is performed on the indoor unit; if at least one of the average rate of the three consecutive preset times relative to the standard current value is not greater than the second pre-preparation If the value is set, the self-cleaning mode is not performed on the indoor unit, and the average value of the average of the next three consecutive preset time periods is compared with the second preset value of the standard current value, and then judged according to the comparison result. Whether to perform self-cleaning mode on the indoor unit.

In a preferred embodiment of the self-cleaning control method described above, the self-cleaning control method further includes: performing a self-cleaning mode on the indoor unit if the running time of the air conditioner reaches a set time.

It can be understood by those skilled in the art that in the preferred technical solution of the present invention, when the air conditioner is in the cooling operation, it is first determined whether the indoor unit generates condensation, and if the indoor unit generates condensation, the plurality of fan currents of the indoor unit are used. The rate of change of the average value relative to the standard current value is compared with the first preset value, and according to the comparison result, it is determined whether the self-cleaning mode is performed on the indoor unit; if the indoor unit does not generate condensation, the plurality of fans of the indoor unit are The rate of change of the average value of the current value with respect to the standard current value is compared with a second preset value, and based on the comparison result, it is determined whether the self-cleaning mode is performed on the indoor unit. In practical applications, since the condensation current causes the fan current of the indoor unit to decrease, the first preset value is set higher than the second preset value, so that when the indoor unit of the air conditioner generates condensation, the The average value of the current values of the plurality of fan currents of the indoor unit is compared with a slightly higher preset value with respect to the rate of change of the standard current value. Through such an arrangement, the air conditioner can enable the air conditioner to perform the self-cleaning mode under reasonable conditions, whether the condensation is generated or the condensation is not generated, that is, the coil temperature of the indoor unit through the introduction of the air conditioner. And the judgment condition of the dew point temperature of the air can avoid the situation in which the air conditioner is erroneously judged to be the ash of the air conditioner due to condensation of the indoor unit, and the self-cleaning mode is frequently executed to waste energy.

Further, when condensation occurs in the indoor unit of the air conditioner, the average value of the current values of the plurality of fan currents in the three consecutive preset time periods may be compared with the first preset value, if The comparison results of the three preset times satisfy the conditions, so that the air conditioner performs the self-cleaning mode. With such a control method, it is possible to further reduce the possibility of misjudgment of the air conditioner, and the air conditioner does not frequently execute the self-cleaning mode due to misjudgment.

Further, when the indoor unit of the air conditioner does not condense, the average value of the current values of the plurality of fan currents in the three consecutive preset time periods may be compared with the second preset value. If the comparison result of the three preset times meets the conditions, the air conditioner is caused to perform the self-cleaning mode. With such a control method, it is possible to further reduce the possibility of misjudgment of the air conditioner, and the air conditioner does not frequently perform the self-cleaning mode due to misjudgment.

In addition, based on the above two control modes, the present invention further provides a control mode for determining whether to execute the self-cleaning mode by whether the running time of the air conditioner reaches a set time, and by using such a control method, the present invention is used. The indoor unit coil temperature sensor for detecting the coil temperature of the indoor unit and the air dew point temperature sensor for detecting the dew point temperature of the air are malfunctioning/damaged, and when the fan current of the indoor unit is detected to be malfunctioning, the operation of the air conditioner can still be performed. The time is used to judge the timing of entering the self-cleaning mode, and it is avoided that the air conditioner cannot perform the self-cleaning mode by the first and second control modes, and the self-cleaning mode is not performed.

DRAWINGS

Figure 1 is a flow chart of the self-cleaning control method of the present invention;

Figure 2 is a flow chart of an embodiment of the self-cleaning control method of the present invention;

Fig. 3 is a schematic block diagram of an air conditioner of the present invention.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the scope of the present invention. For example, although the present invention has been described in connection with an indoor unit of an air conditioner, since the indoor unit and the outdoor unit of the air conditioner are of a symmetrical structure, the principle of the present invention is equally applicable to an outdoor unit during heating operation of the air conditioner. Self-cleaning, at this time, the fan current of the indoor unit in the judgment condition is replaced with the fan current of the outdoor unit, and the coil temperature of the indoor unit is replaced with the coil temperature of the outdoor unit.

The prior art air conditioner based on the background art judges that the air conditioner is frequently subjected to the self-cleaning mode due to misjudgment by judging the single condition of the indoor unit fan current. The invention provides a self-cleaning control method for an air conditioner, which aims to enable the air conditioner to perform a self-cleaning mode under reasonable conditions, thereby avoiding the occurrence of air conditioner ashing due to condensation of the indoor unit due to condensation of the indoor unit. Frequent execution of the self-cleaning mode results in wasted energy.

Specifically, the air conditioner of the present invention includes an indoor unit. As shown in FIG. 1 , the self-cleaning control method of the present invention includes: Step S102, acquiring a coil temperature of the indoor unit and a dew point temperature of the air during the air conditioner cooling operation; Step S104: acquiring a plurality of fan current values of the indoor unit in a preset time; and step S106, calculating an average value of the plurality of fan current values of the indoor unit; and step S108, according to the coil temperature of the indoor unit, the dew point temperature of the air, and an average The value determines whether the self-cleaning mode is performed on the indoor unit. Wherein, the coil temperature of the indoor unit can be obtained by the indoor unit coil temperature sensor, and the dew point temperature of the air is obtained by the air dew point temperature sensor. It should be noted that the fan current of the indoor unit can directly reflect the degree of ashing of the air conditioner, because the load of the fan is determined at a certain speed, and the load of the fan increases at the same speed, correspondingly, the fan current Decrease, this means that the wind resistance of the fan increases, that is to say, the ash on the indoor unit, and the more serious the ash is, the smaller the fan current is. Therefore, the degree of ash of the indoor unit of the air conditioner can be fully judged by the current of the fan. .

Steps S202 to S206 in Fig. 2 correspond to steps S102 to S106 in Fig. 1.

Preferably, as shown in FIG. 2, the step S108 (shown in FIG. 1) of "determining whether to perform the self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value" includes: step S208, Determining whether the coil temperature of the indoor unit is less than the dew point temperature of the air; in step S210, if the coil temperature of the indoor unit is less than the dew point temperature of the air, comparing the rate of change of the average value with the standard current value with the first preset value; Based on the comparison result, it is judged whether or not the self-cleaning mode is performed on the indoor unit. The step of "determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result" includes: if the rate of change of the average value with respect to the standard current value is greater than the first preset value, performing a self-cleaning mode on the indoor unit (step S212); If the rate of change of the average value with respect to the standard current value is not greater than the first preset value, the self-cleaning mode is not performed on the indoor unit (step S230). It should be noted that, in the technical description of the present invention, "do not perform the self-cleaning mode" can be understood as not performing the self-cleaning mode immediately, that is, delaying the execution of the self-cleaning mode. In this way, firstly, by comparing the coil temperature of the indoor unit with the dew point temperature of the air, it is determined whether or not the indoor unit of the air conditioner has condensation. When the coil temperature of the indoor unit is lower than the dew point temperature of the air, the air is in the air. The water vapor will be pre-cooled on the indoor unit to generate condensation. Due to the condensation, the fan current of the indoor unit of the air conditioner will be lowered to some extent, so the specific value of the first preset value can be set lower. For example, when the first preset value is set to 0.2, that is, when the average value of the plurality of fan current values is greater than 0.2 with respect to the standard current value, the air conditioner performs the self-cleaning mode on the indoor unit. Certainly, the first preset value may also be other values, and a person skilled in the art may flexibly set a specific value of the first preset value in an actual application, as long as the demarcation point determined by the first preset value can be determined in the indoor unit. Whether the indoor unit is ashed in the case where condensation occurs.

Preferably, as a variation of the above embodiment, the step of "determining whether to perform the self-cleaning mode to the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value" includes: if the coil temperature of the indoor unit Less than the dew point temperature of the air, the average value of the average of three consecutive preset times is compared with the first preset value; if the average of three consecutive preset times is relative to the standard current value If the rate of change is greater than the first preset value, performing a self-cleaning mode on the indoor unit; if at least one of the average values of the average of the three preset time periods relative to the standard current value is not greater than the first preset value , the self-cleaning mode is not performed on the indoor unit, and the change rate of the average value of the next three consecutive preset time periods with respect to the standard current value is continuously compared with the first preset value, and then according to the comparison result, it is determined whether The indoor unit performs a self-cleaning mode. By such a control method, the air conditioner judges whether or not the operation of executing the self-cleaning mode is more accurate, and further avoids the occurrence of erroneous judgment of the air conditioner, resulting in frequent occurrence of self-cleaning.

Preferably, as shown in FIG. 2, the step of "determining whether to perform the self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value" includes: step S220, if the coil temperature of the indoor unit If the dew point temperature is greater than or equal to the air, the rate of change of the average value with respect to the standard current value is compared with the second preset value; and according to the comparison result, it is determined whether the self-cleaning mode is performed on the indoor unit. The step of determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result includes: if the rate of change of the average value with respect to the standard current value is greater than the second preset value, performing a self-cleaning mode on the indoor unit (step S222); If the rate of change of the average value with respect to the standard current value is not greater than the second preset value, the self-cleaning mode is not performed on the indoor unit (step S230). In this way, firstly, by comparing the coil temperature of the indoor unit with the dew point temperature of the air, it is determined whether or not the indoor unit of the air conditioner has condensation. When the coil temperature of the indoor unit is not less than the dew point temperature of the air, the air conditioner No condensation will occur on the indoor unit, and the fan current of the indoor unit will not be affected by condensation. Therefore, the specific value of the second preset value can be set to be slightly lower, for example, the second preset value is set to 0.1, that is, When the average value of the current values of the plurality of fans is greater than 0.1 with respect to the standard current value, the air conditioner performs the self-cleaning mode on the indoor unit. Certainly, the second preset value may also be other values, and a person skilled in the art may flexibly set a specific value of the second preset value in an actual application, as long as the demarcation point determined by the second preset value can be determined in the indoor unit. Whether the indoor unit is ashed without condensation. In addition, in order to influence the influence of condensation on the fan current of the indoor unit when the indoor unit generates condensation, the first preset value should always be set higher than the second preset value.

Preferably, as a variation of the above embodiment, the step of "determining whether to perform the self-cleaning mode to the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value" includes: if the coil temperature of the indoor unit If the dew point temperature is greater than or equal to the air, the rate of change of the average of the three preset time periods relative to the standard current value is compared with the second preset value; if the average value of the three consecutive preset times is relative to the standard If the rate of change of the current value is greater than the second preset value, the self-cleaning mode is performed on the indoor unit; if at least one of the average rate of the three consecutive preset times relative to the standard current value is not greater than the second pre-preparation If the value is set, the self-cleaning mode is not performed on the indoor unit, and the average value of the average of the next three consecutive preset time periods is compared with the second preset value of the standard current value, and then judged according to the comparison result. Whether to perform self-cleaning mode on the indoor unit. By such a control method, the air conditioner judges whether or not the operation of executing the self-cleaning mode is more accurate, and further avoids the occurrence of erroneous judgment of the air conditioner, resulting in frequent occurrence of self-cleaning.

In the embodiment of the present invention, the standard current value can be measured before the air conditioner is shipped from the factory, that is, the air conditioner is in a completely clean state, the air conditioner is operated under standard working conditions, and the air conditioner is operated in a standard working condition. , the standard current value corresponding to the fan of the indoor unit at different speeds is determined. In addition, the standard current value may also be an average value calculated based on the obtained plurality of fan current values of the indoor unit during the first preset time of the air conditioner cooling operation. For example, obtain the current value of multiple fan currents on the first day of the month of the current month, and calculate the average value, which is used as the standard current value, and each day thereafter (that is, the preset time at this time is in days) The current values of multiple fans are obtained internally, and the average value is calculated. The average value calculated every day is compared with the standard current value. When the average value of the day is higher than the standard current value, the rate of change is greater than the preset value. In the case of the value, the self-cleaning mode is performed on the indoor unit of the air conditioner on that day. Certainly, the preset time is not limited to a daily time, and may be a quarterly, an annual, or an arbitrarily set period of time. A person skilled in the art may flexibly set the duration of the preset time in an actual application, as long as the setting is performed. The average value calculated by the plurality of fan current values in the predetermined preset time can be compared with the standard current value, so that the air conditioner can perform the self-cleaning mode on the indoor unit.

Preferably, the self-cleaning control method of the present invention further comprises: performing a self-cleaning mode on the indoor unit if the running time of the air conditioner reaches a set time. The setting time can be set experimentally by a person skilled in the art, and the setting time can also be set by an empirical method, as long as the demarcation point determined by the set time can enable the air conditioner to perform the self-cleaning mode. . For example, the set time can be 10h (hours), that is, when the running time of the air conditioner reaches 10h, the air conditioner automatically performs the self-cleaning mode immediately.

Referring to FIG. 3, the present invention also provides an air conditioner 100 including an indoor unit 120 and an outdoor unit 110. The indoor unit 120 is provided with a fan 122 and its current detecting device 121 and a heat exchanger 124 (which includes a coil) and a coil temperature sensor 123. In addition, the indoor unit 120 also has a dew point temperature sensor 125 for detecting the air dew point temperature. The air conditioner 100 can adopt the self-cleaning control method described in any of the above embodiments, so that the air conditioner can perform the self-cleaning mode under reasonable conditions whether the air conditioner generates condensation or does not generate condensation. To avoid the waste of energy in the air conditioner.

Heretofore, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings, but it is obvious to those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments. Those skilled in the art can make equivalent changes or substitutions to the related technical features without departing from the principles of the present invention, and the technical solutions after the modifications or replacements fall within the scope of the present invention.

Claims

A self-cleaning control method for an air conditioner, the air conditioner comprising an indoor unit, wherein the self-cleaning control method comprises:

Obtaining a coil temperature of the indoor unit and a dew point temperature of the air during the cooling operation of the air conditioner;

Obtaining a plurality of fan current values of the indoor unit in a preset time;

Calculating an average value of the plurality of fan current values of the indoor unit;

Whether or not the self-cleaning mode is performed on the indoor unit is determined according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value.
The self-cleaning control method according to claim 1, wherein "determining whether to perform a self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value The steps include:

If the coil temperature of the indoor unit is less than a dew point temperature of the air, comparing a rate of change of the average value with respect to a standard current value with a first preset value;

Based on the comparison result, it is judged whether or not the self-cleaning mode is performed on the indoor unit.
The self-cleaning control method according to claim 2, wherein the step of "determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result" comprises:

If the rate of change of the average value relative to the standard current value is greater than the first predetermined value, performing a self-cleaning mode on the indoor unit.
The self-cleaning control method according to claim 3, wherein the step of: determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result further comprises:

If the rate of change of the average value with respect to the standard current value is not greater than the first predetermined value, the self-cleaning mode is not performed on the indoor unit.
The self-cleaning control method according to claim 4, wherein "determining whether to perform a self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value The steps include:

If the coil temperature of the indoor unit is greater than or equal to a dew point temperature of the air, comparing a rate of change of the average value with respect to a standard current value with a second preset value;

Based on the comparison result, it is judged whether or not the self-cleaning mode is performed on the indoor unit.
The self-cleaning control method according to claim 5, wherein the step of "determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result" comprises:

If the rate of change of the average value relative to the standard current value is greater than the second predetermined value, performing a self-cleaning mode on the indoor unit.
The self-cleaning control method according to claim 6, wherein the step of: determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result further comprises:

If the rate of change of the average value with respect to the standard current value is not greater than the second predetermined value, the self-cleaning mode is not performed on the indoor unit.
The self-cleaning control method according to claim 1, wherein "determining whether to perform a self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value The steps include:

If the coil temperature of the indoor unit is less than the dew point temperature of the air, comparing the rate of change of the average value with respect to the standard current value for three consecutive preset times with a first preset value;

Performing a self-cleaning mode on the indoor unit if the rate of change of the average value with respect to the standard current value is greater than the first preset value for three consecutive preset times;

If at least one of the average values of the average values of the three preset time periods with respect to the standard current value is not greater than the first preset value, the self-cleaning mode is not performed on the indoor unit, and the next step is continued The rate of change of the average value with respect to the standard current value for three consecutive preset time periods is compared with the first preset value, and then, based on the comparison result, it is determined whether the self-cleaning mode is performed on the indoor unit.
The self-cleaning control method according to claim 1, wherein "determining whether to perform a self-cleaning mode on the indoor unit according to the coil temperature of the indoor unit, the dew point temperature of the air, and the average value The steps include:

If the coil temperature of the indoor unit is greater than or equal to the dew point temperature of the air, comparing the rate of change of the average value with respect to the standard current value for three consecutive preset times with a second preset value;

Performing a self-cleaning mode on the indoor unit if the rate of change of the average value with respect to the standard current value is greater than the second preset value for three consecutive preset times;

If at least one of the average values of the average values for the three preset time periods is not greater than the second preset value, the self-cleaning mode is not performed on the indoor unit, and the next step is continued The rate of change of the average value with respect to the standard current value for three consecutive preset time periods is compared with the second preset value, and then, based on the comparison result, it is determined whether the self-cleaning mode is performed on the indoor unit.
The self-cleaning control method according to any one of claims 1 to 9, wherein the self-cleaning control method further comprises:

If the running time of the air conditioner reaches a set time, a self-cleaning mode is performed on the indoor unit.