WO2024082752A1

WO2024082752A1 - Air conditioner and control method therefor

Info

Publication number: WO2024082752A1
Application number: PCT/CN2023/109190
Authority: WO
Inventors: 张乃伟; 黄罡; 李伟; 孟相宏; 赵江龙
Original assignee: 青岛海尔空调器有限总公司; 青岛海尔空调电子有限公司; 海尔智家股份有限公司
Priority date: 2022-10-17
Filing date: 2023-07-25
Publication date: 2024-04-25
Also published as: CN115875835A

Abstract

An air conditioner and a control method therefor. The air conditioner comprises: a housing provided with an air outlet; an air deflector, which is rotatably arranged at the air outlet; and a stepping electric motor, which is configured to drive the air deflector to rotate. The control method comprises the following steps: receiving an air conditioner turn-off instruction; controlling a stepping electric motor to drive an air deflector from the current angle to a preset reference angle; and controlling the stepping electric motor to drive the air deflector from the reference angle to a closing angle. The present invention solves the problem of an air deflector not being closed in place.

Description

Air conditioner and control method thereof

Technical Field

The present invention relates to the technical field of air conditioning, and in particular to an air conditioner and a control method thereof.

Background technique

The air outlet of the air conditioner is usually provided with an air guide plate for guiding the air outlet direction, and the air guide plate is driven by a stepper motor. When the air conditioner is turned off, the air guide plate rotates to a closed angle to cover the air outlet.

After the air conditioner has been running for a long time, due to factors such as its own gravity, user's manual operation, etc., the air guide plate often does not close properly, affecting the appearance of the air conditioner.

Therefore, how to reasonably solve the problem of closing the air guide plate of the air conditioner has become an urgent problem to be solved in the air conditioning field.

Summary of the invention

The purpose of the present invention is to solve at least one of the above-mentioned defects in the prior art and to provide an air conditioner and a control method thereof which can solve the problem that the air guide plate is not closed properly.

In one aspect, the present invention provides a control method for an air conditioner, the air conditioner comprising a housing having an air outlet, an air guide plate rotatably disposed at the air outlet, and a stepping motor for driving the air guide plate to rotate, the control method comprising the following steps:

Receive air conditioner shutdown command;

Controlling the stepper motor to drive the air guide plate from a current angle to a preset reference angle;

The stepping motor is controlled to drive the air guide plate from the reference angle to a closing angle.

Optionally, the step of “controlling the stepper motor to drive the air guide plate from the reference angle to the closing angle” includes:

Obtaining the pre-stored first step number required for the stepping motor to drive the air guide plate from the reference angle to the closing angle;

The stepping motor is controlled to run in a closing direction with the first step.

Optionally, the control method further includes:

Counting the number of air conditioner shutdown commands received;

When the count accumulates to a first preset number of times, at the time of shutdown, the step after obtaining the pre-stored number of closing steps required for the stepper motor to drive the air guide plate from the reference angle to the closing angle is: controlling the stepper motor to move toward the closing angle with the sum of the first number of steps and the preset first calibration number of steps. Direction of operation.

Optionally, the air conditioner includes a stopper configured to: block the air guide plate when the air guide plate rotates to the reference angle; and

The step of controlling the stepper motor to drive the air guide plate from the current angle to a preset reference angle includes: controlling the stepper motor to rotate toward the reference angle until the air guide plate touches the stopper.

Optionally, the reference angle is a limit opening angle of the air guide plate.

Optionally, the step of “controlling the stepper motor to drive the air guide plate from a current angle to a preset reference angle” includes:

Obtaining the pre-stored first step number required for the stepper motor to drive the air guide plate from the reference angle to the closed angle, and the opening step number operated by the stepper motor to drive the air guide plate to rotate from the closed angle to the current angle when the air conditioner is turned on this time;

The stepping motor is controlled to operate to the reference angle by the difference between the first step number and the opening step number.

Optionally, the control method further includes:

Counting the number of air conditioner shutdown commands received;

When the count accumulates to a second preset number of times, during the shutdown process, the step after "obtaining the pre-stored first number of steps required for the stepper motor to drive the air guide plate from the reference angle to the closed angle, and the number of opening steps required for the stepper motor to drive the air guide plate to rotate from the closed angle to the current angle when the air conditioner is turned on this time" is: controlling the stepper motor to operate to the reference angle by subtracting the first number of opening steps from the number of opening steps plus the preset second calibration step number.

Optionally, the rotation speed of the stepper motor toward the reference angle is lower than the rotation speed toward the closing angle.

In another aspect, the present invention provides an air conditioner comprising:

A housing having an air outlet;

An air guide plate rotatably mounted at the air outlet;

A stepping motor, used for driving the air guide plate to rotate in a controlled manner; and

A controller comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, it is used to implement the air conditioner control method according to any one of the above items.

Optionally, the wind deflector includes a connecting arm and a wind deflector body, wherein the connecting arm is fixed to the The air deflector body is rotatably mounted on the connecting arm; and

The connecting arm is provided with a blocking portion, which is configured to block the air guide plate when the air guide plate rotates to the reference angle.

In the air conditioner and control method thereof of the present invention, when the air conditioner is turned off and the air guide plate needs to be closed, the stepper motor is first controlled to drive the air guide plate to a preset reference angle, and then rotated from the reference angle to the closing angle. Since the position of the reference angle is fixed, the number of first steps required from the reference angle to the closing angle is fixed, so the stepper motor only needs to be operated for the first step toward the closing angle to stay at the closing angle, thereby solving the problem of the air guide plate not being tightly closed.

Furthermore, in the air conditioner and control method thereof of the present invention, taking into account the possibility of loss of steps during multiple operations of the stepper motor, when the air conditioner is shut down a cumulative number of times reaching a first preset number, a calibration is performed to cause the stepper motor to operate in the closing direction from a reference angle with the sum of the first number of steps and the preset first calibration number of steps, to ensure that the air guide plate can be better closed in place during this and subsequent shutdowns.

Furthermore, in the air conditioner and control method thereof of the present invention, the number of steps taken when the air guide plate is opened is pre-stored, and when the air conditioner is turned off, the stepper motor is controlled to operate to the reference angle by the difference between the first number of steps and the number of opening steps. In addition, to avoid the stepper motor from losing steps when operating multiple times, when the air conditioner is turned off for a cumulative number of times reaching a second preset number of times, a calibration is performed, and the stepper motor is controlled to operate to the reference angle by the first number of steps minus the number of opening steps plus the preset second calibration number of steps, so as to ensure that the air guide plate can correctly operate to the reference angle during this and subsequent shutdowns.

Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

FIG1 is a schematic diagram of an air conditioner according to an embodiment of the present invention;

FIG2 is a schematic block diagram of an air conditioner according to an embodiment of the present invention;

FIG3 is a schematic diagram of a method for controlling an air conditioner according to an embodiment of the present invention;

FIG4 is a flow chart of a method for controlling an air conditioner according to an embodiment of the present invention;

FIG5 is a flow chart of a control method further improved according to the embodiment shown in FIG4 ;

FIG. 6 is a flowchart of a method for controlling an air conditioner according to another embodiment of the present invention.

Detailed ways

The following describes the air conditioner and its control method according to an embodiment of the present invention with reference to FIGS. 1 to 6. The flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the system, method and computer program product according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram may represent a module, a program segment or a part of an instruction, and the module, a program segment or a part of an instruction contains one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the box may also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they may sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and/or flowchart, and the combination of boxes in the block diagram and/or flowchart, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions. It should be noted that the logic and/or steps represented in the flowchart or described in other ways herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or equipment (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or equipment and execute instructions), or used in combination with these instruction execution systems, devices or equipment.

The flow chart provided by the present embodiment is not intended to indicate that the operation of the method will be performed in any particular order, or that all operations of the method are included in all every case. In addition, the method may include additional operations. Within the scope of the technical thinking provided by the present embodiment method, additional changes may be made to the above method.

1 is a schematic diagram of an air conditioner according to an embodiment of the present invention; FIG. 2 is a schematic block diagram of an air conditioner according to an embodiment of the present invention; and FIG. 3 is a schematic diagram of a control method of an air conditioner according to an embodiment of the present invention.

The present invention provides a method for controlling an air conditioner. The air conditioner of the embodiment of the present invention can be a wall-mounted air conditioner, a vertical air conditioner, a window air conditioner, a patio air conditioner or other forms of air conditioners. FIG1 shows an embodiment of a wall-mounted air conditioner.

As shown in FIG1 , the air conditioner of the embodiment of the present invention comprises a housing 10 having an air outlet 12, an air guide plate 50 rotatably disposed at the air outlet 12, and a stepper motor 60 for driving the air guide plate 50 to rotate. The air outlet 12 is used to send out the air supply airflow produced by the air conditioner to adjust the indoor air. The air supply airflow can specifically be a cold airflow, a hot airflow, a fresh airflow, a purified airflow, and the like. When the air conditioner is turned off, the air guide plate 50 is at a closed angle to block the air outlet 12 and prevent dust and impurities from entering. When the air conditioner is turned on, the stepper motor 60 drives the air guide plate 50 to open to guide the air flow of the air outlet 12 and change the direction of the air flow.

As shown in FIG. 1 to FIG. 3 , the air conditioner control method according to the embodiment of the present invention may generally include the following steps:

Step S302: receiving an air conditioner shutdown instruction.

The user can send a shutdown command to the air conditioner controller through a remote control, a control panel, a wireless control terminal, etc. After receiving the shutdown command, the controller will shut down the air conditioner, specifically including shutting down electrical components such as the compressor, and also closing the air guide plate 50, that is, driving the air guide plate 50 to a closing angle.

Step S304: controlling the stepper motor 60 to drive the air guide plate 50 from the current angle to a preset reference angle.

In this step, the reference angle is a preset fixed angle.

Step S306 : controlling the stepper motor 60 to drive the air guide plate 50 from the reference angle to the closing angle, thereby completing the closing process of the air guide plate 50 .

In the description of the embodiments of the present invention, for the sake of simplicity, “reference angle”, “closing angle”, “current angle”, etc. are not only used to indicate the position of the air guide plate 50 , but can also be used to describe the corresponding state of the stepper motor 60 .

When a conventional air conditioner is turned off, a stepper motor is used to directly drive the air guide plate from the current angle to the closed angle. After the air conditioner has been running for a long time, the position of the air guide plate during the opening period may change unexpectedly due to its own gravity, manual manipulation by the user, stepper motor step loss, and other factors. When the air conditioner is turned off, it is not easy for the stepper motor to accurately drive it to the closed position, resulting in an incomplete closing, which affects the appearance of the air conditioner.

In the control method of the embodiment of the present invention, when the air conditioner needs to be shut down and the air guide plate 50 needs to be closed, the stepper motor 60 is first controlled to drive the air guide plate 50 to a preset reference angle, and then rotated from the reference angle to the closing angle. In this way, even if the position of the air guide plate 50 changes unexpectedly during the air conditioner is turned on, it will not affect the subsequent closing process, and the stepper motor 60 can more easily drive the air guide plate 50 to the closing angle accurately.

In some embodiments, the aforementioned reference angle can be used as the limit opening angle of the air guide plate 50, as shown in FIG1. That is, when the air guide plate 50 rotates from the closing angle to the opening direction and reaches the reference angle, it cannot continue to rotate to open. At this time, the air outlet 12 is opened to the maximum extent and the air outlet is smoothest, so it is called the limit opening angle. The moving direction is positive rotation, and when the air guide plate 50 is in any air guide position, it is positive rotation when it rotates toward the reference angle, which makes the control of the stepper motor 60 simpler. Moreover, when the air guide plate 50 rotates to the reference angle (the limit opening angle), it cannot continue to rotate toward the opening direction, which also enables it to find and stay at the reference angle more accurately.

In some embodiments, referring to FIG. 1 , the air conditioner includes a stopper 521. The stopper 521 is configured to block the air guide plate 50 when the air guide plate 50 rotates to a reference angle, so that the air guide plate 50 cannot continue to rotate. Step S304 (the step of controlling the stepper motor 60 to drive the air guide plate 50 from the current angle to a preset reference angle) includes: controlling the stepper motor 60 to rotate toward the reference angle until the air guide plate 50 touches the stopper 521. Specifically, a sensing device such as a contact sensor can be provided to detect the contact between the air guide plate 50 and the stopper 521.

In some optional embodiments, the air conditioner can achieve higher technical effects by further optimizing and configuring the above steps. The control method of the air conditioner of this embodiment is described in detail below in combination with the introduction of an optional execution process of this embodiment. This embodiment is only an example of the execution process. During the specific implementation, the execution order and operating conditions of some steps can be modified according to the specific implementation requirements.

FIG. 4 is a flow chart of a method for controlling an air conditioner according to an embodiment of the present invention.

As shown in FIG. 4 , in a preferred embodiment of the present invention, the air conditioner control method sequentially performs the following steps:

Step S402: receiving an air conditioner shutdown instruction.

Step S404: controlling the stepper motor 60 to drive the air guide plate 50 from the current angle to a preset reference angle.

Step S406: Obtain the pre-stored first step number required for the stepper motor 60 to drive the air guide plate 50 from the reference angle to the closing angle.

Step S408: Control the stepper motor 60 to rotate in the closing direction at the first step. The first step is just enough to make the air guide plate 50 reach the closing angle accurately.

In this embodiment, step S406 and step S408 constitute detailed steps of the aforementioned step of “controlling the stepper motor 60 to drive the air guide plate 50 from the reference angle to the closing angle”.

In this embodiment, since the number of first steps from the reference angle to the closing angle is fixed, the stepper motor 60 only needs to run the first number of times toward the closing angle to stay at the closing angle, making the closing control more precise, thereby solving the problem of the air guide plate 50 not being closed tightly.

FIG. 5 is a flow chart of a control method further improved according to the embodiment shown in FIG. 4 .

As shown in FIG5 , in a preferred embodiment of the present invention, the air conditioner control method sequentially performs the following steps:

Step S502: receiving the air conditioner shutdown command, counting the received air conditioner shutdown commands, that is, recording the number of shutdowns of this shutdown. The shutdown of the air conditioner after the first power-on operation can be recorded as the first shutdown, as the starting point of counting; or the shutdown of the air conditioner after the first operation after a long-term (for example, one or two months) shutdown can be recorded as the first shutdown, as the starting point of counting.

Step S504: controlling the stepper motor 60 to drive the air guide plate 50 from the current angle to a preset reference angle.

Step S506: Determine whether the count accumulation reaches a first preset number of times. If yes, execute step S508; if no, execute step S512.

Step S508: Obtain the pre-stored first step number required for the stepper motor 60 to drive the air guide plate 50 from the reference angle to the closing angle.

Step S510: Control the stepper motor 60 to rotate in the closing direction at the sum of the first step number and the preset first calibration step number.

In this embodiment, in order to avoid the stepper motor 60 from losing steps when operating multiple times, a calibration is performed when the air conditioner is shut down a cumulatively for a first preset number of times, so that the stepper motor 60 runs in the closing direction from the reference angle with the sum of the first step number and the preset first calibration step number, to ensure that the air guide plate 50 can be better closed in place during this and subsequent shutdowns.

For example, the first preset number of times can be set to n times, and the first calibration step number can be set to a step. When the air conditioner is shut down for the nth time, the stepper motor 60 is rotated toward the closing angle by a step, and a calibration is completed. Of course, when the air conditioner is shut down for the n+1th, n+2th, and 2n-1th times, the stepper motor 60 is still shut down according to the first number of times, and a calibration is performed again when the air conditioner is shut down for the 2nth time, and so on. In short, a calibration is performed every time the air conditioner is shut down for the N*nth time (N is a positive integer).

The air conditioners of different models can be tested to confirm the relationship between the number of shutdowns and the closing effect (the degree of lax closing) of the air guide plate 50, so as to reasonably determine the value of the first preset number of times. In addition, the reasonable value of the first calibration step number can be reasonably determined according to the degree of lax closing when the air conditioner is shut down before the first preset number of times.

Step S512: Obtain the pre-stored first step number required for the stepper motor 60 to drive the air guide plate 50 from the reference angle to the closing angle.

Step S514: Control the stepping motor 60 to rotate in the closing direction at the first step.

Since it is determined in step S506 that the count accumulation has not reached the first preset number of times, no calibration is required, and thus the stepping motor 60 is still controlled to be turned off according to the first number of times.

As shown in FIG. 6 , in some embodiments, the step of “controlling the stepper motor 60 to drive the air guide plate 50 from the current angle to the preset reference angle” is further refined. Specifically, the control method includes the following steps:

Step S602: receiving an air conditioner shutdown instruction.

Step S604: Obtain the number of first steps required for the pre-stored stepper motor 60 to drive the air guide plate 50 from the reference angle (extreme opening angle) to the closing angle, as well as the number of opening steps required for the stepper motor 60 to drive the air guide plate 50 from the closing angle to the current angle when the air conditioner is turned on this time.

Step S606: Control the stepping motor 60 to rotate to a reference angle by the difference between the first step number and the opening step number.

The number of steps required for the stepper motor 60 to drive the air guide plate 50 from the closing angle to the reference angle, that is, the limit opening angle, is equal to the first step number. Therefore, the first step number minus the aforementioned opening step number is the number of steps required for the stepper motor 60 to drive the air guide plate 50 from the current angle to the reference angle.

Furthermore, the received air conditioner shutdown instructions can be counted. When the count accumulates to a second preset number of times, during the shutdown process, the step after step S604 (that is, the alternative step of step S606) is: controlling the stepper motor 60 to run to a reference angle with the first number of steps minus the opening number of steps plus the preset second calibration number of steps.

In this embodiment, in order to avoid the stepping motor 60 from losing steps when the air conditioner is shut down for more than 10 times, a calibration is performed when the air conditioner is shut down for a cumulative second preset number of times. For example, the second preset number of times can be set to m times, and the second calibration step number can be set to b steps. When the air conditioner is shut down for the mth time, the stepping motor 60 is rotated toward the reference angle by b steps, and a calibration is completed. Of course, no calibration is performed during the subsequent m+1th, m+2th, and 2m-1th shutdowns, and another calibration is performed at the 2mth shutdown, and so on. In short, a calibration is performed every N*mth (N is a positive integer)th shutdown.

The air conditioners of different models can be tested to confirm the relationship between the number of shutdowns and the closing effect of the air guide plate 50 (failure to accurately reach the reference angle), so as to reasonably determine the value of the second preset number of times. In addition, the reasonable value of the second calibration step number can be determined based on the inaccuracy of the last shutdown at the second preset number of times.

In some embodiments, since the air guide plate 50 will hit the stopper when it rotates to the reference angle, its rotation speed is slightly lowered to reduce noise. The rotation speed n1 of the stepper motor 60 rotating toward the reference angle can be made smaller than the rotation speed n2 of the stepper motor 60 rotating toward the closing angle, for example, 0.3≤n1/n2≤0.4, so as to reduce noise and speed up the closing speed.

Another aspect of the present invention provides an air conditioner.

As shown in FIG. 1 and FIG. 2 , the air conditioner according to the embodiment of the present invention may generally include a housing 10 , an air guide plate 50 , a stepping motor 60 , and a controller 800 .

The housing 10 is provided with an air outlet 12, and the air outlet 12 is used to send out the air supply airflow produced by the air conditioner, which can be specifically a cold air flow, a hot air flow, a fresh air flow, a purified air flow, etc., for regulating the indoor air. The air conditioner can be composed of an evaporator, a condenser, a compressor, a throttling device and other necessary components to form a vapor compression refrigeration cycle system, so as to output cold air/hot air through a fan to achieve cooling and heating of the indoor environment. For example, for a wall-mounted air conditioner, it includes an indoor unit and an outdoor unit located indoors and outdoors, respectively. The aforementioned housing is the housing of the indoor unit, and an evaporator and a fan are arranged in the housing. The condenser, the compressor and other necessary components are components of the outdoor unit.

The air guide plate 50 is rotatably mounted at the air outlet 12. When the air conditioner is turned off, the air guide plate 50 is at a closed angle to block the air outlet 12 and prevent external dust and impurities. After the air conditioner is turned on, the stepper motor 60 drives the air guide plate 50 to open to guide the air flow of the air outlet 12 and change the direction of the air flow. The stepper motor 60 is used to drive the air guide plate 50 to rotate in a controlled manner. The stepper motor 60 can be installed in the housing 10.

The controller 800 includes a processor 810 and a memory 820 . The memory 820 stores a computer program 821 . When the computer program 821 is executed by the processor 810 , it is used to implement the air conditioner control method according to any embodiment of the present invention.

The processor 810 in this embodiment may be a central processing unit (CPU), or a digital processing unit (DSP), etc. The memory 820 is used to store the program executed by the processor 810. The memory 820 may be any medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 820 may also be a combination of various memories 820. Since the computer program 821 implements the various processes of the above method embodiment when executed by the processor 810, and can achieve the same technical effect, it will not be repeated here to avoid repetition.

In some embodiments, the air deflector 50 includes a connecting arm 52 and an air deflector body 51, wherein the connecting arm 52 is fixed to the housing 10, and the air deflector body 51 is rotatably mounted on the connecting arm 52. A blocking portion 521 is provided on the connecting arm 52, which is configured to block the air deflector 50 when the air deflector 50 rotates to a reference angle.

By now, those skilled in the art should recognize that although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can be directly determined or derived based on the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be understood and deemed to cover all such other variations or modifications.

Claims

A control method for an air conditioner, the air conditioner comprising a housing having an air outlet, an air guide plate rotatably arranged at the air outlet, and a stepping motor for driving the air guide plate to rotate, the control method comprising the following steps:

Receive air conditioner shutdown command;

Controlling the stepper motor to drive the air guide plate from a current angle to a preset reference angle;

The stepping motor is controlled to drive the air guide plate from the reference angle to a closing angle.
According to the control method of claim 1, the step of "controlling the stepper motor to drive the air guide plate from the reference angle to the closing angle" comprises:

Obtaining the pre-stored first step number required for the stepping motor to drive the air guide plate from the reference angle to the closing angle;

The stepping motor is controlled to run in a closing direction with the first step.
The control method according to claim 2, further comprising:

Counting the number of air conditioner shutdown commands received;

When the count accumulates to a first preset number of times, during the shutdown, the step after "obtaining the pre-stored number of closing steps required for the stepper motor to drive the air guide plate from the reference angle to the closing angle" is: controlling the stepper motor to operate in the closing direction with the sum of the first number of steps and the preset first calibration number of steps.
The control method according to any one of claims 1 to 3, wherein

The air conditioner includes a stopper configured to: block the air guide plate when the air guide plate rotates to the reference angle; and

The step of controlling the stepper motor to drive the air guide plate from the current angle to a preset reference angle includes: controlling the stepper motor to rotate toward the reference angle until the air guide plate touches the stopper.
The control method according to any one of claims 1 to 3, wherein

The reference angle is the limit opening angle of the air guide plate.
According to the control method of claim 5, the step of "controlling the stepper motor to drive the air guide plate from the current angle to a preset reference angle" comprises:

Obtaining the pre-stored first step number required for the stepper motor to drive the air guide plate from the reference angle to the closed angle, and the opening step number operated by the stepper motor to drive the air guide plate to rotate from the closed angle to the current angle when the air conditioner is turned on this time;

The stepping motor is controlled to operate to the reference angle by the difference between the first step number and the opening step number.
The control method according to claim 6, further comprising:

Counting the number of air conditioner shutdown commands received;

When the count accumulates to a second preset number of times, during the shutdown process, the step after "obtaining the pre-stored first number of steps required for the stepper motor to drive the air guide plate from the reference angle to the closed angle, and the number of opening steps required for the stepper motor to drive the air guide plate to rotate from the closed angle to the current angle when the air conditioner is turned on this time" is: controlling the stepper motor to operate to the reference angle by subtracting the first number of opening steps from the number of opening steps plus the preset second calibration step number.
The control method according to any one of claims 1 to 3, wherein

The rotation speed of the stepping motor when rotating toward the reference angle is lower than the rotation speed when rotating toward the closing angle.
An air conditioner, comprising:

A housing having an air outlet;

An air guide plate rotatably mounted at the air outlet;

A stepping motor, used for driving the air guide plate to rotate in a controlled manner; and

A controller comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the computer program is used to implement the control method of the air conditioner according to any one of claims 1 to 8.
The air conditioner according to claim 9, wherein

The wind deflector comprises a connecting arm and a wind deflector body, wherein the connecting arm is fixed to the housing, and the wind deflector body is rotatably mounted on the connecting arm; and

The connecting arm is provided with a blocking portion, which is configured to: when the air guide plate rotates to the reference Angle blocks the wind deflector.