CONTROL METHOD AND CONTROL DEVICE, AND AIR CONDITIONER FOR DELAYED SHUTDOWN OF INDOOR AIR CONDITIONING FANS

Description

CROSS REFERENCE TO A RELATED APPLICATION

The application claims the benefit of China. patent application No. 202411035598.8 filed Jul. 30, 2024, the contents of which are hereby incorporated in their entirety.

BACKGROUND

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

When an air conditioner is working in a cooling mode or a dehumidification mode, water vapor in the air comes into contact with an indoor heat exchanger having a lower temperature, liquefies to form condensed water, and adheres to a coil of the indoor heat exchanger. At present, a coil of an indoor heat exchanger of an air conditioner is a copper tube in many cases. Condensed water will corrode the copper tube under certain conditions, and the corrosion develops irregularly in different directions, leaving corrosion pinholes like an ant nest on a surface of a wall of the copper tube, which is referred to as ant-nest corrosion. When the ant-nest corrosion develops to a certain extent, the wall of the copper tube may be penetrated to cause refrigerant leakage, which brings a challenge to a safe operation of the air conditioner.

In the related art, in order to delay occurrence of the ant-nest corrosion, when an air conditioner is shut down, an indoor fan is controlled to continue to operate for a fixed duration to reduce condensed water adhering to a coil of a heat exchanger after the air conditioner is shut down. However, this control method does not take into account a specific situation when the air conditioner is shut down, cannot ensure that the condensed water adhering to the coil of the heat exchanger is sufficiently blown dry, and cannot sufficiently utilize a residual cooling capacity of the coil of the heat exchanger after the air conditioner is shut down.

SUMMARY

An object of this application is to provide a control method and control device for delayed shutdown 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 existing in the related art can be resolved or alleviated.

This application provides a control method for delayed shutdown of an indoor fan of an air conditioner, the air conditioner including the indoor fan, an indoor heat exchanger, and a compressor, the control method including: an air conditioner operation mode determination step of determining whether the air conditioner is working in a predetermined mode; a temperature detection and calculation step of acquiring an indoor ambient temperature and a coil temperature of the indoor heat exchanger in real time according to a determination result of the air conditioner operation mode determination step, and calculating a temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger; an indoor fan delayed operation duration presetting step of assigning a preset delayed operation duration N1 of the indoor fan according to a calculation result obtained in the temperature detection and calculation step; an indoor fan current current value acquisition step of acquiring a current current value of the indoor fan; an indoor fan delayed operation duration setting step of generating, when the compressor stops operating, a post-shutdown delayed operation duration N of the indoor fan according to the current current value of the indoor fan acquired in the indoor fan current current value acquisition step and the preset delayed operation duration N1 assigned in the indoor fan delayed operation duration presetting step; a temperature difference comparison step of continuing acquiring the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger in real time after the air conditioner stops operating, and comparing the temperature difference with a set value; an indoor fan shutdown instruction generation step of generating a shutdown instruction for the indoor fan according to a comparison result of the temperature difference comparison step; and an indoor fan shutdown instruction execution step of controlling the indoor fan to continue operating for the post-shutdown delayed operation duration N, and then stopping operation of the indoor fan.

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

In one or more embodiments, in the temperature detection and calculation step, when the compressor receives the shutdown instruction, an average temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger during a predetermined period before receiving the shutdown instruction is calculated.

In one or more embodiments, if the current current value of the indoor fan is greater than or equal to a preset current value, the preset delayed operation duration N1 is used as the post-shutdown delayed operation duration N, and if the current current value of the indoor fan is less than the preset current value, a predetermined duration N2 is added to the preset delayed operation duration N1, and the obtained duration is used as the post-shutdown delayed operation duration N.

In one or more embodiments, if the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger is less than the set value, the shutdown instruction for the indoor fan is generated.

In one or more embodiments, the preset delayed operation duration N1 satisfies the following mathematical relationship,

N ⁢ 1 = C T a + D ,

where T_a represents the average temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger during the predetermined period, and C and D represent fixed preset values.

In one or more embodiments, the predetermined duration N2 satisfies the following mathematical relationship,

N ⁢ 2 = C T a + E ,

where T_a represents the average temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger during the predetermined period, and C and E represent fixed preset values.

In one or more embodiments, before the indoor fan shutdown instruction execution step, the indoor fan continues operating at a rotation speed when the compressor stops operating.

In one or more embodiments of this application further provides a control device for delayed shutdown of an indoor fan of an air conditioner, the control device including: an air conditioner operation mode determination module configured to determine whether the air conditioner is working in a predetermined mode; a temperature detection and calculation module configured to acquire an indoor ambient temperature and a coil temperature of the indoor heat exchanger in real time according to a determination result of the air conditioner operation mode determination module, and calculate a temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger; an indoor fan delayed operation duration presetting module configured to assign a preset delayed operation duration N1 of the indoor fan according to a calculation result obtained by the temperature detection and calculation module; an indoor fan current current value acquisition module configured to acquire a current current value of the indoor fan; an indoor fan delayed operation duration setting module configured to generate, when the compressor stops operating, a post-shutdown delayed operation duration N of the indoor fan according to the current current value of the indoor fan acquired by the indoor fan current current value acquisition module and the preset delayed operation duration N1 assigned by the indoor fan delayed operation duration presetting module; a temperature difference comparison module configured to continue acquiring the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger in real time after the air conditioner stops operating, and compare the temperature difference with a set value; an indoor fan shutdown instruction generation module configured to generate a shutdown instruction for the indoor fan according to a comparison result of the temperature difference comparison module; and an indoor fan shutdown instruction execution module configured to control the indoor fan to continue operating for the post-shutdown delayed operation duration N, and then stop operation of the indoor fan.

In one or more embodiments of this 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 for delayed shutdown of an indoor fan of an air conditioner or includes the above control device for delayed shutdown of the indoor fan of the air conditioner.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a schematic diagram of steps executed in a control method for delayed shutdown of an indoor fan of an air conditioner in an embodiment of this application.

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

FIG. 3 is a flowchart of the control method for delayed shutdown of the indoor fan of the air conditioner in some embodiments of this application.

FIG. 4 is a schematic diagram of modules in a control device for delayed shutdown of an indoor fan of an air conditioner in an embodiment of this application.

REFERENCE NUMERALS

air conditioner operation mode determination step S1, temperature detection and calculation step S2, indoor fan delayed operation duration presetting step S3, indoor fan current current value acquisition step S4, indoor fan delayed operation duration setting step S5, temperature difference comparison step S6, indoor fan shutdown instruction generation step S7, indoor fan shutdown instruction execution step S8, indoor fan 1, indoor heat exchanger 2, compressor 3, memory 4, control device 5, air conditioner operation mode determination module 51, temperature detection and calculation module 52, indoor fan delayed operation duration presetting module 53, indoor fan current current value acquisition module 54, indoor fan delayed operation duration setting module 55, temperature difference comparison module 56, indoor fan shutdown instruction generation module 57, indoor fan shutdown instruction execution module 58.

DETAILED DESCRIPTION OF THE DISCLOSURE

It should be noted that working principles, features, advantages, and the like of a refrigeration apparatus according to this 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 this application.

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

The present embodiment provides a control method for delayed shutdown of an indoor fan of an air conditioner. When the air conditioner is shut down under a condition that the air conditioner is operating in a cooling mode or a dehumidification mode, the indoor fan is controlled to extend an operation time corresponding to a difference between an indoor ambient temperature and a coil temperature of an indoor heat exchanger in a case of shutdown and a current current value of the indoor fan, so that condensed water adhering to a coil of the indoor heat exchanger is blown dry or reduced to a certain extent, and a residual cooling capacity of the indoor heat exchanger is utilized, thereby improving a working efficiency of the air conditioner.

FIG. 1 is a schematic diagram of steps executed in the control method for delayed shutdown of an indoor fan of an air conditioner in some embodiments of this application. Referring to FIG. 1, the control method for delayed shutdown of an indoor fan of an air conditioner according to the present embodiment includes: an air conditioner operation mode determination step S1, a temperature detection and calculation step S2, an indoor fan delayed operation duration presetting step S3, an indoor fan current current value acquisition step S4, an indoor fan delayed operation duration setting step S5, a temperature difference comparison step S6, an indoor fan shutdown instruction generation step S7, and an indoor fan shutdown instruction execution step S8.

FIG. 2 is a schematic diagram of modules of the air conditioner in some embodiments of this application. Referring to FIG. 2, the air conditioner designed in some embodiments includes: an indoor fan 1, an indoor heat exchanger 2, a compressor 3, a memory 4, and a control device 5.

In some embodiments of this application, when the air conditioner starts to operate, the air conditioner operation mode determination step S1 is executed to detect a current operation mode of the air conditioner. If it is detected that the air conditioner is currently operating in a cooling mode or a dehumidification mode, the temperature detection and calculation step S2 is executed to acquire an indoor ambient temperature and a coil temperature of the indoor heat exchanger 2 in real time, and calculate a temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2. After the calculation, the indoor fan delayed operation duration presetting step S3 is executed to assign a preset delayed operation duration N1 of the indoor fan 1 according to a temperature difference value obtained in the temperature detection and calculation step S2.

In this case, the preset delayed operation duration N1 only needs to be associated with the temperature difference value obtained in the temperature detection and calculation step S2. Regarding the preset delayed operation duration N1, according to different models and different working conditions of the air conditioner, a test can be conducted a plurality of times to pre-establish a correlation between the preset delayed operation duration N1 and the above temperature difference value, that is, the preset delayed operation duration N1 can be assigned according to the measured temperature difference value.

Generally speaking, in the cooling mode or the dehumidification mode, the larger the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger, the lower the indoor ambient humidity, and the less the condensed water appears on a coil surface of the indoor heat exchanger 2, and the preset delayed operation duration N1 to be assigned can be shorter. The smaller the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2, the larger the indoor ambient humidity, and the more condensed water appears on the coil surface of the indoor heat exchanger 2, and the preset delayed operation duration N1 to be assigned needs to be longer.

Preferably, as an example, the preset delayed operation duration N1 can be assigned 10 s to 30 s when the temperature difference is large, and 30 s to 50 s when the temperature difference is small.

At the same time, the indoor fan current current value acquisition step S4 is executed to acquire a current current value of the indoor fan 1 in real time and record the current current value. When the air conditioner receives a shutdown instruction to stop operating, the indoor fan delayed operation duration setting step S5 is executed to generate a post-shutdown delayed operation duration N of the indoor fan 1 in consideration of the preset delayed operation duration N1 of the indoor fan 1 assigned in the indoor fan delayed operation duration presetting step S3, and the current current value of the indoor fan 1 acquired in the indoor fan current current value acquisition step S4 (that is, the current current value of the indoor fan 1 when the air conditioner receives the shutdown instruction).

If the current current value of the indoor fan 1 is high and higher than a predetermined current value, it is determined that a current rotation speed of the indoor fan 1 is high and an output air volume is large. In this case, the condensed water adhering to the coil of the indoor heat exchanger 2 can be blown dry in a short post-shutdown delayed operation duration N of the indoor fan 1. When the current current value of the indoor fan 1 is low and lower than a predetermined current value, it is determined that the current rotation speed of the indoor fan 1 is low and the output air volume is small. In this case, it is necessary to set a long post-shutdown delayed operation duration N of the indoor fan 1 to blow dry the condensed water adhering to the coil of the indoor heat exchanger 2.

The specific predetermined current value, the post-shutdown delayed operation duration N when the current current value is higher than the predetermined current value, and the post-shutdown delayed operation duration N when the current current value is lower than the predetermined current value can be pre-tabulated and set according to specific models of the air conditioner. As long as different post-shutdown delayed operation durations N can be selected according to a current value of the indoor fan 1, all contents belong to the protection scope of this application.

When the air conditioner is shut down, the compressor 3 stops operating as the air conditioner receives the shutdown instruction, and a refrigerant stops circulating. In this case, the indoor fan 1 is not shut down, but controls the indoor fan 1 to continue operating for the post-shutdown delayed operation duration N after the air conditioner stops operating. On the one hand, the residual cooling capacity of the indoor heat exchanger 2 is utilized during the operation of the indoor fan 1, so that waste of the residual cooling capacity is avoided and user comfort is improved. On the other hand, the post-shutdown delayed operation duration N of the indoor fan 1 which continues operating after the air conditioner stops operating is determined according to the temperature difference value between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 measured in real time at the time of shutdown (that is, according to a difference in indoor ambient humidities) and the current current value of the indoor fan 1 when the air conditioner receives the shutdown instruction. In this way, the post-shutdown delayed operation duration N of the indoor fan 1 which continues operating after the air conditioner stops operating can be determined based on an amount of condensed water generated on the coil of the indoor heat exchange and a current air volume of the indoor fan 1 at the time of shutdown, so that the condensed water adhering to the coil of the indoor heat exchanger 2 can be blown dry more accurately or further reduced according to actual working conditions of the air conditioner, occurrence of ant-nest corrosion can be delayed, and a service life of the air conditioner can be extended.

After the air conditioner stops operating, the indoor fan 1 is controlled to continue operating for the post-shutdown delayed operation duration N, and the temperature difference comparison step S6 is executed, that is, the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 is continued to be obtained in real time, and compared with a predetermined set value. If the temperature difference is greater than the set value, the indoor fan 1 is controlled to continue operating, and the temperature difference comparison step S6 is repeated. If the temperature difference is less than or equal to the set value, it is determined that the condensed water does not continue to be generated according to the temperature difference between the current indoor ambient temperature and the coil temperature of the indoor heat exchanger 2, and the condensed water adhering to the coil of the indoor heat exchanger 2 has been reduced to a certain extent, and then the indoor fan shutdown instruction generation step S7 is executed, that is, the shutdown instruction for the indoor fan 1 is generated. After the shutdown instruction for the indoor fan is generated and transmitted, in the indoor fan shutdown instruction execution step S8, the indoor fan 1 is still controlled to continue operating for the post-shutdown delayed operation duration N, and continue blowing dry the residual condensed water that may adheres to the coil of the indoor heat exchanger 2, so that it is avoided that the condensed water that is not completely blown dry causes corrosion to the coil of the indoor heat exchanger 2 when the coil temperature of the indoor heat exchanger 2 is close to the indoor ambient temperature. After the indoor fan 1 continues operating for the post-shutdown delayed operation duration N, the indoor fan 1 is controlled to stop operating.

Therefore, according to one or more embodiments of this application, when the air conditioner is shut down, not only magnitude of the indoor ambient humidity (that is, the amount of condensed water that may be generated) estimated based on the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 and the current air volume of the indoor fan 1 at the time of shutdown are considered, but also a current temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 when the indoor fan 1 is maintained in operation (that is, whether there is a possibility of continuing generating the condensed water) and other comprehensive factors are considered to determine a duration required for continuous operation of the indoor fan 1. Therefore, according to the actual working conditions of the air conditioner, it can be further ensured that the condensed water adhering to the coil of the indoor heat exchanger 2 is blown dry, the occurrence of ant-nest corrosion can be prevented, and the service life of the air conditioner can be extended.

As one of preferred embodiments of this application, the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 calculated in the temperature detection and calculation step S2 is an average temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 in a predetermined period before receiving the shutdown instruction. For example, the temperature difference may be an average temperature difference for 5 or 10 consecutive minutes before receiving the shutdown instruction.

According to the above embodiment, the preset delayed operation duration N1 of the indoor fan 1 and the post-shutdown delayed operation duration N of the indoor fan 1 are assigned by the average temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 in the predetermined period before receiving the shutdown instruction, so that the following situations are avoided: the temperatures cannot be accurately detected in real time due to external interference or fluctuations, the obtained temperature difference is inconsistent with the actual temperature difference value, and accordingly, the preset delayed operation duration N1 of the indoor fan 1 and the post-shutdown delayed operation duration N of the indoor fan 1 do not satisfy actual operating conditions, and as a result, if the delayed operation durations are too long, the user experience is affected, or if the delayed operation durations are too short, the condensed water adhering to the coil of the indoor heat exchanger 2 cannot be completely blown dry, so that the condensed water corrodes the coil of the indoor heat exchanger 2.

FIG. 3 is a flowchart of the control method for delayed shutdown of the indoor fan 1 of the air conditioner in some embodiments of this application. Referring to FIG. 3, it is preferably that in the indoor fan delayed operation duration setting step S5, when the air conditioner stops operating, if the current current value of the indoor fan 1 is greater than or equal to the preset current value, it is determined that the indoor fan 1 is currently operating in a high wind speed. In this case, the rotation speed of the indoor fan 1 is high and the output air volume is large. The preset delayed operation duration N1 is used as the post-shutdown delayed operation duration N, so that the residual cooling capacity in the indoor heat exchanger 2 can be sufficiently utilized and the condensed water adhering to the coil of the indoor heat exchanger 2 can be blown dry. If the current current value of the indoor fan 1 is less than the preset current value, it is determined that the indoor fan 1 is currently operating in a slow wind speed. In this case, the rotation speed of the indoor fan 1 is low and the output air volume is small. A predetermined duration N2 is added to the preset delayed operation duration N1, and the obtained duration is used as the post-shutdown delayed operation duration N. The long post-shutdown delayed operation duration N can achieve that the residual cooling capacity in the indoor heat exchanger 2 can be sufficiently utilized and the condensed water adhering to the coil of the indoor heat exchanger 2 can be blown dry.

Preferably, in the indoor fan shutdown instruction generation step S7, if the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 is less than the set value, the shutdown instruction for the indoor fan 1 is generated.

By the above method, if the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 is less than the set value, it is determined that the condensed water does not continue to be generated under the temperature difference between the current indoor ambient temperature and the coil temperature of the indoor heat exchanger 2, and the condensed water adhering to the coil of the indoor heat exchanger 2 has been reduced to a certain extent. After the indoor fan 1 is controlled to continue operating for the post-shutdown delayed operation duration N, the residual cooling capacity in the indoor heat exchanger 2 can be sufficiently utilized, and the condensed water adhering to the coil of the indoor heat exchanger 2 can be blown dry.

Here, the set value may be preferably 1° C. to 4° C., but there is no absolute limit, and the set value can be flexibly set in advance according to operating conditions of different models of air conditioners, the speed of the indoor fan 1, and the like.

Preferably, the preset delayed operation duration N1 satisfies the following mathematical relationship,

N ⁢ 1 = C T a + D ,

where T_a represents the average temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 in a predetermined period, and C and D represent fixed preset values.

Preferably, the predetermined duration N2 satisfies the following mathematical relationship,

N ⁢ 2 = C T a + E ,

where T_a represents the average temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 in a predetermined period, and C and E represent fixed preset values.

In the above method, the preset delayed operation duration N1 and the predetermined duration N2 are calculated by the average temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 in the predetermined period. By setting different preset delayed operation durations N1 and predetermined durations N2 according to the average temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 in the predetermined period, the following situations are avoided: the preset delayed operation duration N1 of the indoor fan 1 and the post-shutdown delayed operation duration N of the indoor fan 1 do not satisfy the actual operating conditions, and as a result, if the delayed operation durations are too long, the user experience are affected, or if the delayed operation durations are too short, the condensed water adhering to the coil of the indoor heat exchanger 2 cannot be completely blown dry, so that the condensed water corrodes the coil of the indoor heat exchanger 2.

Here, the fixed preset value C is preferably 30 to 70, the fixed preset value D is preferably 20 to 40, and the fixed preset value E is preferably 10 to 30. Although the above fixed preset values C, D, and E are preferred in this application, this application is not limited, and different value ranges of the fixed preset values C, D, and E are set according to the operating conditions of different models of air conditioners, the rotation speeds of different indoor fans 1, and the indoor ambient temperatures and indoor ambient humidities in different regions, which are all included in the protection scope of this application.

Preferably, before the indoor fan shutdown instruction execution step S8, the indoor fan 1 continues operating at a rotation speed when the compressor 3 stops operating.

According to the above method, the post-shutdown delayed operation duration N of the indoor fan 1 is obtained by the current current value of the indoor fan 1 when the compressor 3 stops operating, and the indoor fan 1 is controlled to continue operating at the rotation speed when the compressor 3 stops operating, so that when the compressor 3 stops operating, there is no need to adjust the rotation speed of the indoor fan 1, and the rotation speed corresponds to the post-shutdown delayed operation duration N of the indoor fan 1, so that it is avoided that the rotation speed of the indoor fan 1 is suddenly changed, or the user comfort is reduced due to operating at a high speed for a long time, or the cooling capacity of the indoor heat exchanger 2 is not sufficiently utilized due to operating at a low speed for a short time, or the condensed water adhering to the coil of the indoor heat exchanger 2 is not completely blown dry, causing the coil corrosion.

Elements denoted by the same names and symbols as those in the control device 5 for delayed shutdown of the indoor fan 1 of the air conditioner in a second embodiment of this application and the control method for delayed shutdown of the indoor fan 1 of the air conditioner in the one or more embodiments of this application represent identical components, and descriptions thereof are omitted here.

FIG. 4 is a schematic diagram of the control device 5 for delayed shutdown of the indoor fan 1 of the air conditioner in some embodiments of this application. Referring to FIG. 4, the control device 5 for delayed shutdown of the indoor fan 1 of the air conditioner according to some embodiments includes: an air conditioner operation mode determination module 51, a temperature detection and calculation module 52, an indoor fan delayed operation duration presetting module 53, an indoor fan current current value acquisition module 54, an indoor fan delayed operation duration setting module 55, a temperature difference comparison module 56, an indoor fan shutdown instruction generation module 57, and an indoor fan shutdown instruction execution module 58.

In some embodiments of this application, when the air conditioner starts to operate, the air conditioner operation mode determination module 51 detects a current operation mode of the air conditioner. If it is detected that the air conditioner is currently operating in a cooling mode or a dehumidification mode, the temperature detection and calculation module 52 acquires an indoor ambient temperature and a coil temperature of the indoor heat exchanger 2 in real time, and calculate a temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2. After the calculation, the indoor fan delayed operation duration presetting module 53 assigns the preset delayed operation duration N1 of the indoor fan according to the temperature difference value obtained by the temperature detection and calculation module 52.

At the same time, the indoor fan current current value acquisition module 54 acquires a current current value of the indoor fan 1 in real time and records the current current value. When the air conditioner receives a shutdown instruction to stop operating, the indoor fan delayed operation duration setting module 55 generates the post-shutdown delayed operation duration N of the indoor fan 1 in consideration of the preset delayed operation duration N1 of the indoor fan 1 assigned by the indoor fan delayed operation duration presetting module 53, and the current current value of the indoor fan 1 acquired in the indoor fan current current value acquisition module 54 (that is, the current current value of the indoor fan 1 when the air conditioner receives the shutdown instruction).

After the air conditioner stops operating, the indoor fan 1 is controlled to continue operating for the post-shutdown delayed operation duration N, and the temperature difference comparison module 56 is executed, that is, the temperature difference between the indoor ambient temperature and the coil temperature of the indoor heat exchanger 2 is continued to be obtained in real time, and compared with a predetermined set value. If the temperature difference is greater than the set value, the indoor fan 1 is controlled to continue operating, and the temperature difference comparison module 56 is repeatedly executed. If the temperature difference is less than or equal to the set value, it is determined that the condensed water does not continue to be generated according to the temperature difference between the current indoor ambient temperature and the coil temperature of the indoor heat exchanger 2, and the condensed water adhering to the coil of the indoor heat exchanger 2 has been reduced to a certain extent, and then the indoor fan shutdown instruction generation module 57 is executed, that is, the shutdown instruction for the indoor fan 1 is generated. After the shutdown instruction 1 for the indoor fan is generated and transmitted, in the indoor fan shutdown instruction execution module 58, the indoor fan 1 is still controlled to continue to operate for the post-shutdown delayed operation duration N, and continue to blow dry the residual condensed water that may adheres to the coil of the indoor heat exchanger 2, so that it is avoided that the condensed water that is not completely blown dry causes corrosion to the coil of the indoor heat exchanger 2 when the coil temperature of the indoor heat exchanger 2 is close to the indoor ambient temperature. After the indoor fan 1 continues operating for the post-shutdown delayed operation duration N, the indoor fan 1 is controlled to stop operating.

In some embodiments, the air conditioner operation mode determination module 51 controls and executes the air conditioner operation mode determination step S1, the temperature detection and calculation module 52 controls and executes the temperature detection and calculation step S2, the indoor fan delayed operation duration presetting module 53 controls and executes the indoor fan delayed operation duration presetting step S3, the indoor fan current current value acquisition module 54 controls and executes the indoor fan current current value acquisition step S4, the indoor fan delayed operation duration setting module 55 controls and executes the indoor fan delayed operation duration setting step S5, the temperature difference comparison module 56 controls and executes the temperature difference comparison step S6, the indoor fan shutdown instruction generation module 57 controls and executes the indoor fan shutdown instruction generation step S7, and the indoor fan shutdown instruction execution module 58 controls and executes the indoor fan shutdown instruction execution step S8.

However, the above execution mode is merely an optional execution mode provided in some embodiments, and does not limit the modules for controlling the steps, and a plurality of steps may be integrated into one module to execute or one step may be executed by a plurality of modules without particular limitations.

An embodiment of this application further provides an air conditioner including the memory 4 and the control device 5, in which the control device 5 executes any one of the above control methods for delayed shutdown of the indoor fan 1 of the air conditioner.

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

It should be understood that the description and the drawings are not intended to limit the invention to the particular form disclosed, but to the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention as defined by the appended claims. Further modifications and alternative embodiments of various aspects of the invention will be apparent to those skilled in the art in view of this description. Accordingly, this description and the drawings are to be construed as illustrative only and are for the purpose of teaching those skilled in the art the general manner of carrying out the invention. It is to be understood that the forms of the invention shown and described herein are to be taken as examples of embodiments. Elements and materials may be substituted for those illustrated and described herein, parts and processes may be reversed or omitted, and certain features of the invention may be utilized independently, all as would be apparent to one skilled in the art after having the benefit of this description of the invention. Changes may be made in the elements described herein without departing from the spirit and scope of the invention as described in the following claims. Headings used herein are for organizational purposes only and are not meant to be used to limit the scope of the description.

As used throughout this application, the word “may” is used in a permissive sense (i.e., meaning having the potential to), rather than the mandatory sense (i.e., meaning must). The words “include”, “including”, and “includes” and the like mean including, but not limited to. As used herein, the statement that two or more parts or components are “coupled” shall mean that the parts are joined or operate together either directly or indirectly, i.e., through one or more intermediate parts or components, so long as a link occurs. As used herein, “directly coupled” means that two elements are directly in contact with each other. As used herein, “fixedly coupled” or “fixed” means that two components are coupled so as to move as one while maintaining a constant orientation relative to each other. As used throughout this application, the singular forms “a,” “an,” and “the” include plural referents unless the content explicitly indicates otherwise. Thus, for example, reference to “an element” or “a element” includes a combination of two or more elements, notwithstanding use of other terms and phrases for one or more elements, such as “one or more.” The term “or” is, unless indicated otherwise, non-exclusive, i.e., encompassing both “and” and “or.” Terms describing conditional relationships, e.g., “in response to X, Y,” “upon X, Y,”, “if X, Y,” “when X, Y,” and the like, encompass causal relationships in which the antecedent is a necessary causal condition, the antecedent is a sufficient causal condition, or the antecedent is a contributory causal condition of the consequent, e.g., “state X occurs upon condition Y obtaining” is generic to “X occurs solely upon Y” and “X occurs upon Y and Z.” Such conditional relationships are not limited to consequences that instantly follow the antecedent obtaining, as some consequences may be delayed, and in conditional statements, antecedents are connected to their consequents, e.g., the antecedent is relevant to the likelihood of the consequent occurring. Further, unless otherwise indicated, statements that one value or action is “based on” another condition or value encompass both instances in which the condition or value is the sole factor and instances in which the condition or value is one factor among a plurality of factors. Unless otherwise indicated, statements that “each” instance of some collection have some property should not be read to exclude cases where some otherwise identical or similar members of a larger collection do not have the property, i.e., each does not necessarily mean each and every. Unless specifically stated otherwise, as apparent from the discussion, it is appreciated that throughout this specification discussions utilizing terms such as “processing,” “computing,” “calculating,” “determining” or the like refer to actions or processes of a specific apparatus, such as a special purpose computer or a similar special purpose electronic processing/computing device.

While the present disclosure has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the essential scope thereof. For example, it is to be understood that the present disclosure contemplates that, to the extent possible, one or more features of any embodiment can be combined with one or more features of any other embodiment. Therefore, it is intended that the present disclosure not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this present disclosure, but that the present disclosure will include all embodiments falling within the scope of the claims.