CONTROL METHOD OF INDOOR FAN OF AIR CONDITIONER, CONTROL DEVICE AND AIR CONDITIONER

Description

PRIORITY STATEMENT

This application claims benefit of Chinese Patent Application No. 202411119719.7, filed Aug. 14, 2024, and all the benefits accruing therefrom under 35 U.S.C. § 119, the contents of which in their entirety are herein incorporated by reference.

BACKGROUND

This application relates to a field of a control method and a control device of an indoor fan of an air conditioner, and an air conditioner using the control method or including the control device.

SUMMARY

An object of the present application is to provide a control method and a control device of an indoor fan of an air conditioner, and an air conditioner using the control method or including the control device, so that some problems in the related art can be resolved or alleviated.

The present application provides a control method of an indoor fan of an air conditioner, and the control method is applicable to an air conditioner including a compressor, an indoor heat exchanger, and the indoor fan. The control method according to the present application, including: an air conditioner operation mode determination step of determining whether the air conditioner is working in a predetermined mode; a compressor working state detection step of detecting in real time and recording a current working state of the compressor; an indoor heat exchanger coil temperature detection step of detecting in real time and recording a coil temperature T_z of the indoor heat exchanger; an indoor return air temperature detection step of detecting an indoor return air temperature T₁ in real time; an indoor return air temperature comparison step of comparing the indoor return air temperature T₁ detected in real time with an air conditioner set target temperature T_S; an indoor fan reverse instruction generation step of generating an indoor fan reverse instruction based on a detection result in the compressor working state detection step, the coil temperature T_z of the indoor heat exchanger, and a comparison result in the indoor return air temperature comparison step; and an indoor fan reverse instruction execution step of executing, by the indoor fan, an indoor fan reverse operation based on the indoor fan reverse instruction.

In one or more embodiments, in the indoor fan reverse instruction generation step, an indoor fan reverse instruction for instructing the indoor fan to operate in reverse at different rotational speeds is generated based on different coil temperatures T_z of the indoor heat exchanger.

In one or more embodiments, in the indoor fan reverse instruction execution step, when the coil temperature T_z of the indoor heat exchanger is higher than a first set temperature T₀ but lower than a second set temperature T₂₁, the indoor fan is controlled to operate in reverse at a first set rotational speed; when the coil temperature T_z of the indoor heat exchanger is higher than the second set temperature T₂₁ but lower than a third set temperature T₂₂, the indoor fan is controlled to operate in reverse at a second set rotational speed; and when the coil temperature T_z of the indoor heat exchanger is higher than the third set temperature T₂₂ but lower than a fourth set temperature T₂, the indoor fan is controlled to operate in reverse at a third set rotational speed.

In one or more embodiments, the first set rotational speed is less than the second set rotational speed, and less than the third set rotational speed.

In one or more embodiments, the first set temperature T₀ is a fixed preset value; and the fourth set temperature T₂ is the coil temperature T_z of the indoor heat exchanger when the indoor return air temperature T₁ is less than or equal to the air conditioner set target temperature T_S.

In one or more embodiments, the second set temperature T₂₁ and the third set temperature T₂₂ are obtained by interpolation between the first set temperature T₀ and the fourth set temperature T₂.

In one or more embodiments, the predetermined mode is that the air conditioner operates in a cooling mode.

In one or more embodiments, the control method further including: an electrostatic dust removal mode operation step, in which an electrostatic dust removal mode is operated after the indoor fan reverse instruction is generated in the indoor fan reverse instruction generation step.

In one or more embodiments, the control method further including: an indoor fan reverse exit instruction step of instructing the indoor fan to exit reverse when the indoor return air temperature T₁ and the air conditioner set target temperature T_S satisfy a numerical relational expression T₁−T_S≥n, in which n is a fixed preset value.

In another aspect, the present application further provides a control device of an indoor fan of an air conditioner, the control device further including: an air conditioner operation mode determination module configured to determine whether the air conditioner is working in a predetermined mode; a compressor working state detection module configured to detect in real time and record a current working state of a compressor; an indoor heat exchanger coil temperature detection module configured to detect in real time and record a coil temperature T_z of an indoor heat exchanger; an indoor return air temperature detection module configured to detect an indoor return air temperature T₁ in real time; an indoor return air temperature comparison module configured to compare the indoor return air temperature T₁ detected in real time with an air conditioner set target temperature T_S; an indoor fan reverse instruction generation module configured to generate an indoor fan reverse instruction based on a comparison result of the compressor working state detection module, the coil temperature T_z of the indoor heat exchanger, and a comparison result of the indoor return air temperature comparison module; and an indoor fan reverse instruction execution module configured to execute, by the indoor fan, an indoor fan reverse operation based on the indoor fan reverse instruction.

In another aspect, the present application further provides an air conditioner including: a memory and a control device, in which the control device executes any one of the above control methods of an indoor fan of an air conditioner.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a schematic diagram of steps executed in a control method of an indoor fan of an air conditioner in one or more embodiments of the present application;

FIG. 2 is a schematic diagram of modules of the air conditioner in some embodiments of the present application;

FIG. 3 is a schematic diagram of steps executed in a control method of an indoor fan of an air conditioner in one or more embodiments of the present application;

FIG. 4 is a schematic diagram of steps executed in a control method of an indoor fan of an air conditioner in one or more embodiments of the present application; and

FIG. 5 is a schematic diagram of modules in a control device of an indoor fan of an air conditioner in one or more embodiments of the present application.

Reference numerals: compressor 1, indoor heat exchanger 2, indoor fan 3, memory 4, control device 5, air conditioner operation mode determination module 51, indoor return air temperature detection module 52, indoor return air temperature comparison module 53, compressor working state detection module 54, indoor heat exchanger coil temperature detection module 55, indoor fan reverse instruction generation module 56, indoor fan reverse instruction execution module 57.

DETAILED DESCRIPTION OF THE DISCLOSURE

It should be noted that working principles, features, advantages, and the like of a refrigeration apparatus according to the present application will be explained below by way of embodiments. However, it should be understood that all descriptions are only given for exemplification and therefore these embodiments should not be understood as forming any limitation on the present application.

In addition, for any single technical feature described or implicit in some embodiments mentioned herein, or any single technical feature shown or implicit in the drawings, the present application still allows any combination or deletion between these technical features (or their equivalents) without any technical obstacles, thereby obtaining more other embodiments of the present application that may not be directly mentioned herein.

When an air conditioner works in a cooling mode, before a room where the air conditioner is located reaches a room set temperature, an indoor fan generally operates at a high rotational speed, and at this time, the indoor fan has a large air output volume, which facilitates heat exchange between an indoor heat exchanger and the indoor air, so that an indoor temperature can quickly reach the set temperature. When the indoor temperature reaches the set temperature, the air conditioner operates at this time to maintain the indoor temperature at the set temperature. When the indoor temperature reaches the set temperature, a frequency of a compressor and a rotational speed of the indoor fan are reduced. However, the rotational speed of the indoor fan cannot be reduced without limitation due to lubrication of bearing grease.

In the existing configurations, a low-air-speed air volume of the indoor fan cannot be made very small. When the indoor temperature reaches the set temperature, to prevent the indoor temperature from continuing to decrease, the compressor frequently starts and stops, which affects a service life of the compressor. Moreover, frequent starting and stopping of the compressor may cause large fluctuations in indoor temperature, giving people a feeling of hot and cold, resulting in poor user experience.

Furthermore, when the indoor temperature reaches the set temperature, even if the indoor fan operates at a relatively small rotational speed, direct airflow toward the user may still cause a localized sensation of “overcooling”, leading to a decrease in user comfort.

A control method and a control device of an indoor fan of an air conditioner, and an air conditioner using the control method or including the control device of the present disclosure aims to at least solve or alleviate some of these problems.

FIG. 1 is a schematic diagram of steps executed in a control method of an indoor fan of an air conditioner in one or more embodiments of the present application. As illustrated in FIG. 1, the control method of an indoor fan of an air conditioner according to this embodiment includes an air conditioner operation mode determination step S1, an indoor return air temperature detection step S2, an indoor return air temperature comparison step S3, a compressor working state detection step S4, an indoor heat exchanger coil temperature detection step S5, an indoor fan reverse instruction generation step S6, and an indoor fan reverse instruction execution step S7.

FIG. 2 is a schematic diagram of modules of the air conditioner in some embodiments of the present application. As illustrated in FIG. 2, an air conditioner 101 according to this embodiment includes a compressor 1, an indoor heat exchanger 2, an indoor fan 3, a memory 4, and a control device 5.

In some embodiments of the present application, when the air conditioner 101 is started to operate, the air conditioner operation mode determination step S1 is executed to detect a current operation mode of the air conditioner 101, and if it is detected that the current air conditioner 101 is currently operating in a cooling mode, the indoor return air temperature detection step S2 is executed to detect an indoor return air temperature T₁ in real time, and after the indoor return air temperature T₁ is obtained, the indoor return air temperature comparison step S3 is executed to compare the indoor return air temperature T₁ detected in real time with an air conditioner set target temperature T_S. When the indoor return air temperature T₁ is less than or equal to the air conditioner set target temperature T_S, the compressor working state detection step S4 is executed to detect in real time and record a current working state of the compressor 1. The indoor heat exchanger coil temperature detection step S5 is executed to detect in real time and record a coil temperature T_z of the indoor heat exchanger 2. A current operating condition of the air conditioner 101 is determined in combination with a comparison result in the indoor return air temperature comparison step S3 and the current working state of the compressor 1 detected in real time in the compressor working state detection step S4.

When it is determined that the air conditioner 101 enters an operation stage of maintaining an indoor set temperature, the indoor fan reverse instruction generation step S6 is executed, and an indoor fan reverse instruction is generated based on a detection result in the compressor working state detection step S4, the coil temperature T_z of the indoor heat exchanger 2, and the comparison result in the indoor return air temperature comparison step S3, and after the indoor fan reverse instruction is generated, the indoor fan reverse instruction execution step S7 is executed, and the indoor fan 3 is controlled to operate in reverse based on the indoor fan reverse instruction.

Specifically, when the comparison result in the indoor return air temperature comparison step S3 is that the indoor return air temperature T₁ is less than or equal to the air conditioner set target temperature T_S, and it is detected that the number of frequent start-stop times of the compressor 1 within a set time reaches or exceeds the set number of times in the compressor working state detection step S4, for example, the compressor 1 is detected to start and stop twice or more within half an hour, it is determined that the air conditioner 101 enters the operation stage of maintaining the indoor set temperature, and the indoor fan reverse instruction generation step S6 and the indoor fan reverse instruction execution step S7 are executed. In this way, the indoor fan 3 is controlled to operate in reverse based on the detection result in the compressor working state detection step S4, the coil temperature T_z of the indoor heat exchanger 2, and the comparison result in the indoor return air temperature comparison step S3.

Generally, an air volume output when the indoor fan 3 operates in reverse is significantly lower than a minimum air volume when the indoor fan 3 operates in forward. When the air conditioner 101 enters the operation stage of maintaining the indoor set temperature, while maintaining the compressor 1 working at a lowest frequency, there is no need to frequently start and stop the compressor 1. Instead, the indoor fan 3 is controlled to operate in reverse, and thus the output air volume of the indoor fan 3 is greatly lower than the air volume during the forward operation, that is, a cooling capacity output by the air conditioner 101 when the indoor fan 3 operates in reverse is significantly lower than a cooling capacity output by the air conditioner 101 when the indoor fan 3 operates in forward at a minimum rotational speed.

In the above manner, when the air conditioner 101 enters the operation stage of maintaining the indoor set temperature, the compressor 1 is controlled to continue to work at the lowest frequency, and at the same time, the indoor fan 3 operates in reverse to reduce the output of the cooling capacity by the air conditioner 101, thereby avoiding a need for the compressor 1 to stop operating to reduce the output of the cooling capacity when the indoor return air temperature T₁ is less than or equal to the air conditioner set target temperature T_S. If the compressor 1 needs to stop operating to reduce the output of the cooling capacity, and when factors such as indoor lighting, electrical appliances, and human body heat dissipation cause the indoor return air temperature T₁ to increase, which is higher than the air conditioner set target temperature T_S, the compressor 1 needs to be started again, causing the compressor 1 to frequently start and stop and affecting a service life of the compressor 1.

In some embodiments of the present application, when the indoor return air temperature T₁, that is, the indoor ambient temperature, is less than or equal to the air conditioner set target temperature T_S, the indoor fan 3 is controlled to operate in reverse, and thus the air conditioner 101 is continuously output with a lower cooling capacity while the compressor 1 is controlled to continue to operate, thereby avoiding a problem that a large indoor temperature fluctuation may be caused by frequent start-stop of the compressor 1, and user experience is affected.

At the same time, when the indoor return air temperature T₁, that is, the indoor ambient temperature, is low, the forward operation of indoor fan 3 may cause users to feel locally overcooled. By controlling the indoor fan 3 to operate in reverse, a problem of cold air directly blowing onto users, which affects comfort of air conditioner 101, is avoided.

Although in some embodiments of the present application, it is comprehensively determined that the air conditioner 101 enters the operation stage of maintaining the indoor set temperature based on the comparison result in the indoor return air temperature comparison step S3 and the detection result in the compressor working state detection step S4 in which it is detected that the number of frequent start-stop times of the compressor 1 within the set time reaches or exceeds the set number of times, the present application is not limited thereto. Settings that the air conditioner 101 enters the operation stage of maintaining the indoor set temperature is comprehensively determined based solely on the comparison result in the indoor return air temperature comparison step S3, solely based on the operating condition of compressor 1, or based on other parameters are all included within the scope of the present application.

Further, in some embodiments of the present application, an example in which the indoor return air temperature T₁, that is, the indoor ambient temperature, is less than or equal to the air conditioner set target temperature T_S is used for description. However, the present application is not limited thereto. When a difference between the indoor return air temperature T₁ and the air conditioner set target temperature T_S reaches a predetermined threshold, for example, when the predetermined threshold is 1.0° C. or 0.5° C., the indoor fan reverse instruction generation step S6 and the indoor fan reverse instruction execution step S7 are executed, which also fall within the protection scope of the present application.

Alternatively, a time to reach the air conditioner set target temperature T_S is predicted based on a time variation curve of the indoor return air temperature T₁, and accordingly, the indoor fan reverse instruction generation step S6 and the indoor fan reverse instruction execution step S7 are executed, which also falls within the protection scope of the present application.

In some embodiments, the indoor fan reverse instruction generation step S6, an indoor fan reverse instruction for instructing the indoor fan 3 to operate in reverse at different rotational speeds is generated based on different coil temperatures T_z of the indoor heat exchanger 2.

Considering that when the coil temperature T_z of the indoor heat exchanger 2 is different, the cooling capacity output by the air conditioner 101 is also different. To further meet the cooling capacity required when the air conditioner 101 enters the operation stage of maintaining the indoor set temperature, and avoid the indoor return air temperature T₁ continuing to decrease due to excessive output cooling capacity, when the indoor return air temperature T₁ is less than or equal to the set target temperature T_S of the air conditioner 101, the coil temperature T_z of the indoor heat exchanger 2 is set to a fourth set temperature T₂, and a first set temperature T₀ is set to a fixed preset value, for example, 0° C. A second set temperature T₂₁ and a third set temperature T₂₂ are obtained by interpolation calculation between the first set temperature T₀ and the fourth set temperature T₂. The first set temperature T₀ is lower than the second set temperature T₂₁ and lower than the third set temperature T₂₂ and lower than the fourth set temperature T₂.

In some embodiments of the present application, when the coil temperature T_z of the indoor heat exchanger 2 is higher than the first set temperature T₀ but lower than the second set temperature T₂₁, the indoor fan 3 is controlled to operate in reverse at a first set rotational speed; when the coil temperature T_z of the indoor heat exchanger 2 is higher than the second set temperature T₂₁ but lower than the third set temperature T₂₂, the indoor fan 3 is controlled to operate in reverse at a second set rotational speed; when the coil temperature T_z of the indoor heat exchanger 2 is higher than the third set temperature T₂₂ but lower than the fourth set temperature T₂, the indoor fan 3 is controlled to operate in reverse at a third set rotational speed.

According to different operating conditions of the air conditioner 101, the compressor 1, and an evaporator, the reverse rotational speed of the indoor fan 3 is flexibly set. Any setting that controls the cooling capacity output by the air conditioner 101 to meet the cooling capacity required in the operating stage of maintaining the indoor set temperature shall be included in the protection scope of the present application. In some embodiments, the first set rotational speed is less than the second set rotational speed, and less than the third set rotational speed.

In the above manner, when it is determined that the air conditioner 101 enters the operation stage of maintaining the indoor set temperature, the coil temperature T_z of the indoor heat exchanger 2 detected in real time in the indoor heat exchanger coil temperature detection step S5 is compared with the first set temperature T₀, the second set temperature T₂₁, the third set temperature T₂₂, and the fourth set temperature T₂. If a comparison result is that the coil temperature T_z of the indoor heat exchanger 2 is higher than the first set temperature T₀ but lower than the second set temperature T₂₁, a coil temperature of the indoor heat exchanger 2 is extremely low in this case, and only a very small air volume is required to meet a cooling capacity demand for the operation stage of maintaining the indoor set temperature of the air conditioner 101, and thus the indoor fan 3 is controlled to operate in reverse at the first set rotational speed.

If the comparison result is that the coil temperature T_z of the indoor heat exchanger 2 is higher than the second set temperature T₂₁ but lower than the third set temperature T₂₂, the coil temperature of the indoor heat exchanger 2 is low in this case, and an air volume slightly greater than an output air volume when the indoor fan 3 operates in reverse at the first set rotational speed is required to meet the cooling capacity demand for the operation stage of maintaining the indoor set temperature of the air conditioner 101, and thus the indoor fan 3 is controlled to operate in reverse at the second set rotational speed.

If the comparison result is that the coil temperature T_z of the indoor heat exchanger 2 is higher than the third set temperature T₂₂ but lower than the fourth set temperature T₂, the coil temperature of the indoor heat exchanger 2 is high in this case, and a larger output air volume is required to meet the cooling capacity demand for the operation stage of maintaining the indoor set temperature of the air conditioner 101, and thus the indoor fan 3 is controlled to operate in reverse at the third set rotational speed.

The indoor fan 3 is controlled to operate in reverse at different rotational speeds based on different coil temperatures T_z of the indoor heat exchanger 2, and it is fully considered that when the coil temperature T_z of the indoor heat exchanger 2 is different, the cooling capacity output by the air conditioner 101 is different. This avoids a problem that when the coil temperature T_z of the indoor heat exchanger 2 is extremely low, the indoor fan 3 is still controlled to operate in reverse at a relatively high rotational speed, resulting in a relatively large output air volume and high output cooling capacity, and the indoor return air temperature T₁ continues to decrease, or when the coil temperature T_z of the indoor heat exchanger 2 is relatively high, the indoor fan 3 is controlled to operate in reverse at a relatively low rotational speed, resulting in a relatively small output air volume and low output cooling capacity, which cannot meet the indoor cooling load, and the indoor return air temperature T₁, that is, the indoor ambient temperature, rises, affecting thermal comfort of the user.

Although the fixed preset value is used as the first set temperature T₀ in some embodiments, the present application is not limited thereto, and setting different first set temperatures T₀ based on different operating conditions of the air conditioner 101, different ambient temperatures and humidity conditions of a region where the air conditioner 101 is located, and the like shall be included in the protection scope of the present application.

Further, although the second set temperature T₂₁ and the third set temperature T₂₂ are obtained by interpolation calculation between the first set temperature T₀ and the fourth set temperature T₂ in some embodiments, the present application is not limited thereto, and settings of the second set temperature T₂₁ and the third set temperature T₂₂ obtained by other means such as equal division should also be included in the protection scope of the present application.

FIG. 3 is a schematic diagram of steps executed in the control method of an indoor fan of an air conditioner in one or more embodiments of the present application. As illustrated in FIG. 3, the control method of an indoor fan of an air conditioner in some embodiments further includes an electrostatic dust removal mode operation step S8.

When the indoor fan 3 operates in forward, the air sucked into an interior of the air conditioner 101 by the indoor fan 3 may contain impurities such as dust. The dust is attached to the interior of the air conditioner 101 through filtering of a filter screen, thereby avoiding the air blown out by the air conditioner 101 from containing impurities such as dust and affecting the user experience. When the indoor fan 3 is controlled to operate in reverse, to avoid the dust attached to the interior of the air conditioner 101 from being carried out of the air conditioner 101 due to the indoor fan 3 operating in reverse, the electrostatic dust removal mode operation step S8 is executed, and after the indoor fan reverse instruction is generated in the indoor fan reverse instruction generation step S6, an electrostatic dust removal mode is operated.

In the above manner, when the indoor fan 3 operates in reverse, the electrostatic dust removal mode is operated, and an electrostatic field is used to ionize gas, and thus the impurities such as dust carried out by the indoor fan 3 operating in reverse are charged and attached onto the electrode, thereby avoiding the problem that the dust attached to the filter screen or the interior of the air conditioner 101 is blown indoors due to the indoor fan 3 operating in reverse, which affects the user experience.

Although in some embodiments, the indoor fan 3 is prevented from operating in reverse and blowing dust indoors in the form of electrostatic dust removal, the present application is not limited thereto, and setting for achieving a purpose of dust removal in other forms shall be included in the protection scope of the present application.

FIG. 4 is a schematic diagram of steps executed in the control method of an indoor fan of an air conditioner in one or more embodiments of the present application. As illustrated in FIG. 4, the control method of an indoor fan of an air conditioner in some embodiments further includes an indoor fan reverse exit instruction step S9.

In consideration of changes in factors such as internal and external disturbances that may lead to an increase in the indoor cooling load, it is set that, when the indoor return air temperature T₁ and the air conditioner set target temperature T_S satisfy a predetermined numerical relational expression T₁−T_S≥n, the indoor fan reverse exit instruction step S9 is executed, and the indoor fan 3 is to instructed to exit operating in reverse, and preferably, n is a fixed preset value.

When the air conditioner 101 operates in the operation stage of maintaining the indoor set temperature, the indoor fan 3 is controlled to operate in reverse, and in this case, the cooling capacity output by the air conditioner 101 is low, which can meet the cooling load of maintaining the indoor set temperature, avoid the output cooling capacity from being too high or too low to greatly affect the indoor ambient temperature, and reduce thermal comfort of the user. By setting that when the indoor return air temperature T₁ and the air conditioner set target temperature T_S satisfy the numerical relational expression T₁−T_S≥n, the indoor fan reverse exit instruction step S9 is executed, and the indoor fan 3 is instructed to exit operating in reverse, which avoids a problem that when the indoor cooling load increases due to changes in factors such as internal and external disturbances, the air conditioner 101 cannot adjust the operation mode in time, resulting in reduced indoor thermal comfort, and optimizes the user experience.

Different values of n can be flexibly set based on different models and powers of the air conditioner 101, as long as the operation mode of the air conditioner 101 can be quickly changed when the indoor cooling load changes, settings that can avoid the indoor ambient temperature from rising and affecting the indoor thermal comfort are all included in the protection scope of the present application. Preferably, in some embodiments, n is 2° C.

FIG. 5 is a schematic diagram of modules in a control device of an indoor fan of an air conditioner in one or more embodiments of the present application. As illustrated in FIG. 5, the control device 5 of the indoor fan of the air conditioner according to this embodiment includes an air conditioner operation mode determination module 51, an indoor return air temperature detection module 52, an indoor return air temperature comparison module 53, a compressor working state detection module 54, an indoor heat exchanger coil temperature detection module 55, an indoor fan reverse instruction generation module 56, and an indoor fan reverse instruction execution module 57.

In some embodiments of the present application, when the air conditioner 101 is started to operate, the air conditioner operation mode determination module 51 detects a current operation mode of the air conditioner 101, and if it is detected that the air conditioner 101 is currently operating in the cooling mode, the indoor return air temperature detection module 52 detects the indoor return air temperature T₁ in real time, and after the indoor return air temperature T₁ is obtained, the indoor return air temperature comparison module 53 compares the indoor return air temperature T₁ detected in real time with the air conditioner set target temperature T_S.

Meanwhile, the compressor working state detection module 54 detects in real time and records the current working state of the compressor 1. The indoor heat exchanger coil temperature detection module 55 detects in real time and records the coil temperature T_z of the indoor heat exchanger 2. Further, in combination with a comparison result of the indoor return air temperature comparison module 53 and a current working state of the compressor 1 detected in real time by the compressor working state detection module 54, the current operation stage of the air conditioner 101 is determined.

When it is determined that the air conditioner 101 enters the operation stage of maintaining the indoor set temperature, the indoor fan reverse instruction generation module 56 generates an indoor fan reverse instruction based on a detection result of the compressor working state detection module 54, the coil temperature T_z of the indoor heat exchanger, and the comparison result of the indoor return air temperature comparison module 53, and after the indoor fan reverse instruction is generated, the indoor fan reverse instruction execution module 57 controls the indoor fan 3 to operate in reverse, in response to the indoor fan reverse instruction.

Specifically, in some embodiments, the air conditioner operation mode determination module 51 controls execution of the air conditioner operation mode determination step S1. Similarly, the indoor return air temperature detection module 52 controls execution of the indoor return air temperature detection step S2, the indoor return air temperature comparison module 53 controls execution of the indoor return air temperature comparison step S3, the compressor working state detection module 54 controls execution of the compressor working state detection step S4, the indoor heat exchanger coil temperature detection module 55 controls execution of the indoor heat exchanger coil temperature detection step S5, the indoor fan reverse instruction generation module 56 controls execution of the indoor fan reverse instruction generation step S6, and the indoor fan reverse instruction execution module 57 controls execution of the indoor fan reverse instruction execution step S7.

One or more embodiments of the present application further provides an air conditioner 101 including the memory 4 and the control device 5, in which the control device 5 executes any one of the above control methods of an indoor fan of an air conditioner.

The above embodiments are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.