CN113864976B

CN113864976B - Indoor unit control method and device, air conditioning system and storage medium

Info

Publication number: CN113864976B
Application number: CN202111165715.9A
Authority: CN
Inventors: 付兆强; 王明明; 霍军亚; 梁国强
Original assignee: GD Midea Air Conditioning Equipment Co Ltd; Foshan Shunde Midea Electric Science and Technology Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Foshan Shunde Midea Electric Science and Technology Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-09-20
Anticipated expiration: 2041-09-30
Also published as: CN113864976A

Abstract

The invention provides an indoor unit control method, an indoor unit control device, an air conditioning system and a storage medium, wherein the method comprises the following steps: responding to a wind guide adjusting instruction, acquiring a target rotating speed of the fan, and determining a first power of the fan and a first driving angle of the motor according to a first corresponding relation; when the driving angle of the motor is stabilized at a first driving angle and the stable operation of the fan at the target rotating speed exceeds a first preset time, keeping the rotating speed of the fan unchanged, adjusting the driving angle of the motor for multiple times, and determining a second driving angle; determining a second power of the fan corresponding to the second driving angle; determining the maximum value of the first power and the second powers as the target power of the fan; determining a target driving angle of a motor corresponding to the target power, and controlling the motor to run to the target driving angle; and controlling the motor to return to the initial position according to the target driving angle. The invention can make the motor return to the initial position accurately, and can be applied to the technical field of air conditioners.

Description

Indoor unit control method and device, air conditioning system and storage medium

Technical Field

The invention relates to the technical field of air conditioners, in particular to an indoor unit control method and device, an air conditioner system and a storage medium.

Background

In the running process of the air conditioner, the air guide component on the indoor unit is controlled by the motor to move, and the wind direction of the air blown by the indoor unit is controlled by different opening degrees of the air guide component, so that the aim of homogenizing the indoor temperature is fulfilled. When the air conditioner is turned off, the motor needs to run reversely, so that the air guide component is restored to the initial position.

In the related art, the motor can be ensured to be restored to the initial position by providing a fixed compensation value, however, if the rotation angle of the motor is accurate, after the air guide component is restored to the initial position, the motor still rotates reversely according to the fixed compensation value, the stepping motor is easy to generate heat, the power consumption of the stepping motor is increased, and the mechanical structure related to the air guide component is excessively stressed, so that the service life of the mechanical structure is influenced.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides an indoor unit control method, an indoor unit control device, an air conditioning system and a storage medium, which can enable a motor to accurately reversely rotate and return to an initial position.

On one hand, the embodiment of the application provides a control method of an indoor unit, the indoor unit comprises a fan, a motor and an air guide component, wherein the motor is used for controlling the opening degree of the air guide component through an output driving angle; the control method comprises the following steps: responding to a wind guide adjusting instruction, and acquiring a target rotating speed of the fan; determining a first power of the fan and a first driving angle of the motor according to the target rotating speed and a preset first corresponding relation; controlling the motor to be driven to the first driving angle from an initial position and the fan to operate at the target rotating speed; the motor keeps the first driving angle, and after the fan runs for a first preset time at the target rotating speed, the driving angle of the motor is adjusted for multiple times, so that a plurality of second driving angles are obtained; determining a plurality of second powers of the fan corresponding to the plurality of second driving angles; selecting one of the first power and the plurality of second powers as a target power; controlling the motor to operate to a target driving angle of the motor corresponding to the target power; and controlling the motor to return to the initial position according to the target driving angle.

Optionally, the control method further includes: and responding to a starting instruction or a shutdown instruction, and determining the air guide adjusting instruction.

Optionally, the obtaining a target rotation speed of the fan in response to the wind guide adjustment instruction includes: responding to the air guide adjusting instruction, and acquiring a first parameter of the indoor unit; determining a target rotating speed of the fan according to the first parameter and a preset second corresponding relation; wherein the first parameter includes at least one of a set temperature and a set wind speed of the indoor unit.

Optionally, the adjusting the driving angle of the motor for a plurality of times and determining a plurality of second driving angles includes: adjusting the driving angle of the motor for multiple times according to a preset adjusting step length to determine a plurality of second driving angles; and the second driving angle is the sum of the current driving angle of the motor and the adjusting step length.

Optionally, the determining a plurality of second powers of the fan corresponding to a plurality of the second driving angles includes: after each adjustment, acquiring the operation data of the fan corresponding to the current second driving angle; determining the second power according to the operating data; and the operation data is the operation parameters of the fan.

Optionally, the operational data comprises a torque and a mechanical speed of the wind turbine; or the operation data comprises direct-axis voltage, quadrature-axis voltage, direct-axis current and quadrature-axis current of the fan; or the operation data comprises a U-phase voltage, a V-phase voltage, a W-phase voltage, a U-phase current, a V-phase current and a W-phase current of the fan.

Optionally, the control method further includes: when the adjusting times are larger than a preset first threshold value, stopping adjusting the driving angle of the motor; or when the difference value between the second driving angle and the first driving angle is greater than or equal to a preset second threshold value, stopping adjusting the driving angle of the motor.

Optionally, the control method further includes: and updating the first corresponding relation according to the target rotating speed, the target power and the target driving angle.

Optionally, the control method further includes: when the motor runs to the target driving angle, periodically acquiring the running data according to a preset detection period, and calculating third power of the fan according to the running data; and when the difference value between two third powers corresponding to any adjacent detection periods is greater than a preset third threshold value, generating the air guide adjusting instruction.

On the other hand, the embodiment of the application provides an indoor unit control device, the indoor unit includes fan, motor and wind-guiding part, the motor is used for through the drive angle control of output the aperture of wind-guiding part, controlling means includes: the first module is used for responding to a wind guide adjusting instruction and acquiring a target rotating speed of the fan; the second module is used for determining a first power of the fan and a first driving angle of the motor according to the target rotating speed and a preset first corresponding relation; the third module is used for controlling the motor to be driven to the first driving angle from an initial position and controlling the fan to run at the target rotating speed; the fourth module is used for keeping the first driving angle by the motor, and regulating the driving angle of the motor for multiple times after the fan operates at the target rotating speed for a first preset time so as to obtain multiple second driving angles; a fifth module, configured to determine a plurality of second powers of the fan corresponding to a plurality of the second driving angles; a sixth module, configured to select one of the first power and the plurality of second powers as a target power; the seventh module is used for controlling the motor to operate to a target driving angle of the motor corresponding to the target power; and the eighth module is used for controlling the motor to return to the initial position according to the target driving angle.

On the other hand, an embodiment of the present application provides a control apparatus, including: at least one processor; at least one memory for storing at least one program; when at least one program is executed by at least one processor, the at least one processor is enabled to realize the indoor unit control method.

On the other hand, the embodiment of the application provides an air conditioning system, which comprises the indoor unit.

In another aspect, an embodiment of the present application provides a computer storage medium, in which a program executable by a processor is stored, and when the program is executed by the processor, the program is used to implement the indoor unit control method as described above.

The control method of the indoor unit of the embodiment of the invention has the following beneficial effects: responding to a wind guide adjusting instruction, acquiring a target rotating speed of the fan, and determining a first power of the fan and a first driving angle of the motor according to a first corresponding relation; controlling a motor to drive to a first driving angle from an initial position, and controlling a fan to operate at a target rotating speed; the motor keeps the first driving angle, and after the fan runs for a first preset time at the target rotating speed, the driving angle of the motor is adjusted for multiple times to obtain a second driving angle; determining a second power of the fan corresponding to the second driving angle; selecting one of the first power and the plurality of second powers as a target power of the fan; determining a target driving angle of a motor corresponding to the target power, and controlling the motor to run to the target driving angle; and controlling the motor to return to the initial position according to the target driving angle. The invention can make the motor return to the initial position accurately, reduce the probability of heating caused by the excessive reverse rotation of the motor, thereby reducing the power consumption of the motor; and the condition that the mechanical structure related to the air guide component is excessively stressed can be reduced, and the service life of the air guide component is effectively prolonged. In addition, the invention does not need to add other hardware structures and has lower cost. The invention is widely applied to the technical field of air conditioners.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention, and do not constitute a limitation thereof.

Fig. 1 is a schematic view of an indoor unit according to some embodiments of the present invention;

fig. 2 is a flowchart illustrating steps of an indoor unit control method according to some embodiments of the present invention;

FIG. 3 is a flowchart of steps for obtaining a target rotational speed of a wind turbine according to some embodiments of the present disclosure;

FIG. 4 is a flowchart illustrating steps for adjusting the motor back to a target drive angle according to some embodiments of the present invention;

fig. 5 is a schematic view of an indoor unit control apparatus according to some embodiments of the present invention;

fig. 6 is a schematic diagram of a control device according to some embodiments of the present invention.

Detailed Description

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

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

In the operation process of the air conditioner, when the air conditioner is closed, the motor for controlling the air guide part needs to rotate reversely and return to the initial position, so that the air guide part is closed, and dust is reduced from entering the air conditioner. In order to save cost, a stepping motor without rotation angle feedback is generally used for driving the air guiding component. However, due to the failure of the motor, the aging and dirt of the mechanical structure connecting the air guiding component, the user touching the air guiding component, and the like, the motor may rotate reversely by a preset angle, but the air guiding component cannot be completely closed.

In the related art, the problem is solved by providing a fixed compensation value, namely, on the basis of a preset air guide angle, when the air guide part needs to be closed, the motor is enabled to rotate reversely by a fixed angle, so that the success rate of returning the motor to the initial position is improved. For example, the angle of the motor which is turned on every time is 0 ° to 120 °, if the motor is turned on 120 °, a difference value of 5 ° is set as a fixed compensation value, and the motor is forced to rotate reversely by 125 ° when the air guiding part is turned off, thereby ensuring that the motor can always return to the initial position.

However, on the one hand, the fixed compensation value may not always satisfy the requirement that the motor completely returns to the initial position, because as an uncompensated stepping motor, the stepping motor driving the air guiding component cannot accurately obtain the currently output driving angle, and when the fixed compensation value is set too small, the air guiding component may not be completely closed.

On the other hand, if the driving angle output by the motor accurately corresponds to the opening of the air guide component, after the air guide component is restored to the initial position, the motor still continues to rotate reversely according to the fixed compensation value, so that the stepping motor is easy to generate heat, the power consumption of the stepping motor is increased, and the mechanical structure related to the air guide component is excessively stressed, and the service life of the mechanical structure is influenced.

Based on this, the embodiment of the application provides an indoor unit control method, an indoor unit control device, an air conditioning system and a storage medium, and the implementation process of the method is as follows: according to the method, the corresponding accurate driving angle under the current fan rotating speed and the fan power is determined according to the relationship among the fan rotating speed, the fan power and the motor driving angle, and when the air guide part needs to be closed by the motor in a reverse rotation mode, the motor can be accurately returned to the initial position, the probability of heating of the motor due to the excessive reverse rotation is reduced, and therefore the power consumption of the motor is reduced; and the condition that the mechanical structure related to the air guide component is excessively stressed can be reduced, and the service life of the air guide component is effectively prolonged. In addition, the invention does not need to add other hardware structures and has lower cost. The invention is widely applied to the technical field of air conditioners.

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

Referring to fig. 1, fig. 1 is a schematic view of an indoor unit 100 according to some embodiments of the present invention, where the indoor unit includes a fan 110, a motor 120, and a wind guide member 130. The motor 120 is used for controlling the opening degree of the wind guide member 130 by the output driving angle.

In the embodiments of the present application, the wind turbine refers to a wind turbine assembly including, but not limited to, a wind turbine and a motor driving the wind turbine. In order to distinguish from the motor that drives the air guiding part in the embodiment of the present application, the motor that controls the fan is referred to as a driving motor in the embodiment of the present application. As shown in fig. 1, a wind rotor is denoted by reference numeral 140, and a driving motor of the wind rotor is denoted by reference numeral 150. Therefore, the rotation speed of the fan provided in the embodiment of the present application actually refers to the rotation speed of the wind wheel in the fan assembly; the fan power provided in the embodiment of the present application actually refers to the operating power of the driving motor of the wind wheel. Therefore, it should be noted that, in the embodiments of the present application, the "power of the fan", "power of the driving motor", and the like, refer to the operation power of the driving motor for driving the wind wheel in the fan to rotate.

In the embodiment of the present application, the specific type of the driving motor is not particularly limited, and the driving motor may be a servo motor, a stepping motor, or a permanent magnet synchronous motor.

In the embodiment of the application, the air guide component is arranged in the air duct or the air opening, and the air blown out by the air conditioner is guided by the air guide component through different opening degrees. It can be understood that some connected mechanical structures exist between the air guide component and the motor, and the motor outputs a rotation angle to drive the corresponding mechanical structure to move, so that the air guide component moves, and the aim of controlling the opening degree of the air guide component is fulfilled.

In some embodiments, the air guiding component can be an air guiding strip arranged at an air outlet of the air conditioner; in other embodiments, the air guide part can also be a valve plate of a check valve arranged in the air duct, and the air guide part is effectively closed, so that the condition that dust enters the air conditioner can be reduced.

In the embodiment of the application, the motor is used for driving the opening degree of the air guide part, the motor outputs different driving angles, and accordingly the air guide part can move to different opening degrees along with the driving angles, so that the effect of controlling the wind direction of blowing air of the air conditioner and enabling the indoor temperature to be uniform is achieved.

The motor in the present application refers to a feedback-free motor, and is, for example, a feedback-free stepping motor. Since the motor without feedback cannot know the current driving angle, the problems mentioned in the above may occur that the air guiding part cannot be completely closed and the stepping motor is excessively reversely rotated. Replacing the motor or adding other hardware structures can increase the manufacturing cost of the air conditioner. Therefore, the indoor unit control method is provided, the motor can be accurately reversely rotated to return to the initial position without adding other hardware structures, and cost is saved.

Referring to fig. 2, fig. 2 is a flowchart illustrating steps of an indoor unit control method according to some embodiments of the present invention, where the method is applied to the indoor unit shown in fig. 1, and the method includes, but is not limited to, steps S200 to S270:

s200, responding to a wind guide adjusting instruction, and acquiring a target rotating speed of the fan;

specifically, the air guide adjusting instruction is used for controlling the indoor unit to adjust the air guide component, namely, to adjust the driving angle of the motor. The target rotating speed refers to the rotating speed of the fan directly or indirectly set by a user. And the indoor unit responds to the acquired air guide adjusting instruction to acquire the target rotating speed of the fan.

In some embodiments, the invention provides a scheme for obtaining the target rotating speed of the fan according to the first parameter. Referring to fig. 3, fig. 3 is a flowchart illustrating steps of acquiring a target rotational speed of a fan according to some embodiments of the present invention, where the method includes, but is not limited to, the following steps S201 to S202:

s201, responding to an air guide adjusting instruction, and acquiring a first parameter of an indoor unit;

specifically, the first parameter includes at least one of a set temperature and a set wind speed of the indoor unit, and a user may set the temperature or the wind speed of the indoor unit through a remote controller, a control panel of the air conditioner, and other devices, for example, the user sets: the set temperature is 23 ℃, and the set wind speed is 1 wind. And responding to the air guide adjusting instruction, and acquiring at least one of the set temperature and the set wind speed of the indoor unit set by a user.

It will be appreciated that the first parameter may comprise, in addition to the set temperature and the set wind speed, other parameters that affect the speed of the fan, such as the mode of operation of the air conditioner, etc.

S202, determining a target rotating speed of the fan according to the first parameter and a preset second corresponding relation;

specifically, the second corresponding relationship represents a corresponding relationship between the first parameter and a target rotation speed of the fan. It is understood that the second corresponding relationship may be represented in a table form or a function form. Through the second corresponding relation stored in the indoor machine program or the parameter table, the target rotating speed of the fan can be determined according to the first parameter, and meanwhile, in order to achieve the first parameter set by the user, the fan can operate to the corresponding target rotating speed.

Through steps S201 to S202, the embodiment of the present application provides a scheme for determining a target rotation speed of a fan according to a first parameter of an indoor unit.

In some embodiments, the air guide adjusting instruction in the embodiments of the present application may be triggered by a user, and the user may use a remote controller to send the air guide adjusting instruction to the air conditioner by infrared; the air guide adjusting instruction can also be sent to the air conditioner by mobile terminals such as a mobile phone and the like through connection modes such as wifi and Bluetooth, and the air guide adjusting instruction can also be sent to the indoor unit through a control panel of the indoor unit.

In other embodiments, the air guide adjusting instruction may be triggered by the indoor unit, for example, after the indoor unit receives the power-on instruction, the air guide part needs to be opened to blow air, so that the indoor unit generates the air guide adjusting instruction in response to the power-on instruction. For another example, after receiving the shutdown instruction, the indoor unit needs to close the air guide component, and therefore, the indoor unit generates the air guide adjustment instruction in response to the shutdown instruction.

S210, determining a first power of a fan and a first driving angle of a motor according to the target rotating speed and a preset first corresponding relation;

specifically, the preset first corresponding relation refers to a corresponding relation between the target rotation speed and the first power and the first driving angle. It is understood that the first correspondence may be embodied in a table form or a functional form. Through the first corresponding relation pre-stored in the parameter table or program of the indoor unit, the corresponding first power and the first driving angle of the motor can be determined according to the target rotating speed.

The first power is the maximum power of a driving motor of the fan in the process of stable operation of the fan at the target rotating speed. The first driving angle is a motor driving angle corresponding to a driving motor of the fan reaching the maximum power when the fan stably operates at the target wind speed. Wherein, the stable operation means that the time length of the fan operating at the target rotating speed exceeds a first preset time length,

in other embodiments, the first power may also be the minimum power of the driving motor during the stable operation of the fan at the target rotation speed, and in the subsequent step S240, the minimum value of the first power and the plurality of second powers is selected as the target power of the fan.

From the above, the embodiments of the present application intend to explain that: generally, through a plurality of tests, the corresponding relationship between different rotating speeds of the fan and the maximum power or the minimum power of the fan can be determined, so as to determine the corresponding relationship between the rotating speed of the fan, the power of the fan and the driving angle of the motor, namely determine the first corresponding relationship in the embodiment of the application. When the target power is selected in the following step S240, the type of the first power should be used as a basis for selection, that is, when the first power is the maximum power corresponding to the target rotational speed of the fan, the maximum value should be used as a basis, and the maximum value should be selected from the first power and the plurality of second powers as the target power; similarly, when the first power is the minimum power corresponding to the target rotating speed of the fan, the minimum value is selected from the first power and the plurality of second powers to serve as the target power.

For convenience of explanation, in the embodiment of the present application, a maximum power corresponding to a target rotation speed is uniformly described as an example.

When the indoor unit obtains the target rotating speed, the motor is controlled to move to the corresponding driving angle according to the first corresponding relation, and in the closing process of the air guide component, the motor reversely rotates according to the driving angle to close the air guide component.

However, when the wind guide part is touched manually, the motor cannot return to the initial position completely after reversing the corresponding driving angle in the closing process of the wind guide part, that is, the wind guide part cannot be closed completely. When the air guide component is driven to be opened according to the target rotating speed next time, the motor starts to move at a position with a certain angle difference from the initial position, so that the opening degree of the air guide component is inaccurate, and the air guide effect is influenced.

Therefore, in this step, first power and a first driving angle corresponding to the target rotation speed are determined according to the first correspondence stored in the indoor unit, and the first power and the first driving angle are checked in the subsequent steps.

S220, controlling the motor to be driven to the first driving angle and controlling the fan to run at the target rotating speed;

specifically, it is mentioned in the above, if the wind guiding adjustment instruction can be triggered by a start instruction, the target rotation speed of the fan is determined in step S200, and after the first driving angle of the motor is determined in step S210, the motor is controlled to be driven from the initial position to the first driving angle, the rotation speed of the fan is controlled to be increased to the target rotation speed, and the fan is controlled to operate at the target rotation speed.

It can be understood that when the air guide adjusting instruction is triggered by the shutdown instruction, if the motor has moved to the first driving angle, the current driving angle of the motor is maintained unchanged; and if the fan stably runs at the target rotating speed, maintaining the current target rotating speed of the fan unchanged.

S230, the motor keeps the first driving angle, and after the fan runs at the target rotating speed for a first preset time, the driving angle of the motor is adjusted for multiple times, so that multiple second driving angles are obtained;

specifically, the first preset time period refers to a time period required for the rotation speed of the fan to reach a stable state, that is, when the time period for the fan to operate at the target rotation speed exceeds the first preset time period, it may be considered that the fan is operating at the target rotation speed stably.

It is understood that the period of time that the fan is operated at the target speed is calculated from the moment the fan reaches the target speed.

The motor operates according to the first driving angle obtained in step S210, and stops rotating when rotating to the first driving angle, and maintains the first driving angle.

When the angle of the motor is a first driving angle and the fan runs at the target rotating speed for a first preset time, the driving angle of the motor is adjusted for multiple times under the condition that the rotating speed of the fan is kept unchanged, and a plurality of different driving angles are obtained and are called as second driving angles.

In some embodiments, the motor driving the wind-directing component may be a non-feedback stepper motor. The step motor is a motor which converts an electric pulse signal into corresponding angular displacement or linear displacement, and the rotating speed of the step motor can be controlled by inputting pulses with different frequencies, namely the angular displacement generated by the step motor in each forward or backward movement.

Therefore, when the motor is a stepping motor without feedback, the angular displacement with fixed size generated by the motor moving forward or backward each time can be called as an adjustment step length, and the driving angle of the motor can be changed for multiple times according to the preset adjustment step length, namely the sum of the current driving angle of the motor and the adjustment step length is determined as a second driving angle.

Since the adjustment step length refers to the fixed angular displacement moved by the motor in each adjustment, the adjustment step length may be a positive value or a negative value. When the adjusting step length is a positive value, the motor advances one adjusting step length on the basis of the current driving angle; and when the adjusting step length is a negative value, the motor retreats by one adjusting step length on the basis of the current driving angle.

That is, each time the motor is adjusted, the motor increases or decreases by one adjustment step based on the current driving angle, thereby obtaining a new driving angle. In this step, under the condition of keeping the rotating speed of the fan unchanged, a plurality of second driving angles can be obtained through multiple times of adjustment of the motor.

Through the above, the embodiment of the application provides that the driving angle of the motor can be adjusted for multiple times, that is, the opening degree of the air guide part is periodically adjusted, but in the actual use process of the air conditioner, if the time of the adjusting process is too long, a certain influence is caused on the air blowing effect of the air conditioner, and the effect of quickly and uniformly adjusting the indoor temperature is difficult to achieve. On the other hand, the error between the real wind guiding angle of the motor corresponding to the maximum power (the first power) of the fan and the first driving angle is generally not too large, so that if the total adjusting amplitude is too large, that is, the difference between the first driving angle and the maximum second driving angle is too large, some unnecessary power loss is also caused.

Thus, the adjustment process can be controlled by setting certain adjustment conditions, which when met, stop adjusting the drive angle of the motor and start the subsequent processing steps.

In some embodiments, the adjustment condition may be that the number of adjustments reaches a preset first threshold. The adjusting times can refer to the unidirectional adjusting times of the motor and the total adjusting times of the motor. For example, it is mentioned above that the motor in the embodiment of the present application may be a stepping motor without feedback, and take a common two-four-phase hybrid stepping motor as an example, the stepping angle of the stepping motor is 1.8 °, that is, the adjustment step of each adjustment is 1.8 °, and in the four-phase eight-beat operation mode, the motor adjusts once and rotates 0.9 ° after receiving one pulse signal, the first threshold may be set to 20, and when the number of times the motor is adjusted in the same direction reaches 20 times, it indicates that the motor is adjusted in the direction by 18 ° with respect to the first driving angle, the driving angle adjustment of the motor in the direction may be stopped, and then the adjustment in the opposite direction is performed or subsequent calculation processing is performed.

In other embodiments, the adjustment condition may be that a difference between the second driving angle and the first driving angle is greater than or equal to a preset second threshold. Still taking the two-four phase hybrid stepping motor with a step angle of 1.8 ° mentioned above as an example, for example, if the second threshold is set to 20 °, when the number of times of adjustment of the motor in the same direction reaches 23 times, the difference between the maximum second driving angle in the direction and the first driving angle is 20.7 °, which is greater than the preset 20 °, the adjustment of the driving angle in the direction is stopped, and then the adjustment in the opposite direction or the subsequent calculation processing is performed.

Through the embodiment, the process that the motor can be restricted to adjust the driving angle according to the preset adjusting condition is provided, the power consumption is reduced, and the process of wind guide adjustment is accelerated.

S240, determining a plurality of second powers of the fan corresponding to the second driving angles;

specifically, according to a plurality of different second driving angles, a plurality of different powers of the corresponding fans are respectively calculated, and the powers are referred to as second powers.

It can be understood that, under the condition that the fan maintains the current target rotating speed, the different driving angles of the motor can enable the wind guide angle to be maintained at different opening degrees, so that certain influence is generated on the power of the fan, that is, the power of the fan is changed. Therefore, after the motor driving angle is adjusted each time, the second power of the fan corresponding to the current second driving angle needs to be calculated.

In some embodiments, the second power may be calculated from operational data of the wind turbine. The operation data refers to data which changes constantly when the fan operates. In the above, it is mentioned that the motor for driving the wind wheel in the wind turbine to rotate is called a driving motor, and the embodiment of the present application is not limited to a specific type of the driving motor, unlike the motor for driving the air guiding component to move in the embodiment of the present application. Thus, for different drive motors, different operational data may be acquired to calculate the second power.

For example, when the driving motor is a stepping motor, the operation data includes the torque and the mechanical speed of the fan, i.e., the torque and the mechanical speed of the driving motor, the second power is represented by P, the torque is represented by τ, and the mechanical speed is represented by ω, then the following formula holds:

P＝τ*ω。

for another example, when the driving motor is a permanent magnet synchronous motor, the operation data packet is transmittedThe direct-axis voltage, quadrature-axis voltage, direct-axis current and quadrature-axis current of the fan, namely the direct-axis voltage, quadrature-axis voltage, direct-axis current and quadrature-axis current of the driving motor, the second power is represented by P, and the direct-axis voltage is represented by U _d Indicating, for quadrature voltage, U _q Indicating, direct current by i _d Indicating, for quadrature currents i _q This means that the following holds:

for another example, when the driving motor is a servo motor, the operation data includes a U-phase voltage, a V-phase voltage, a W-phase voltage, a U-phase current, a V-phase current, and a W-phase current of the fan, that is, the U-phase voltage, the V-phase voltage, the W-phase voltage, the U-phase current, the V-phase current, and the W-phase current of the driving motor, the second power is represented by P, and the U-phase voltage is represented by U-phase voltage _u U for representing V phase voltage _v U for W phase voltage _w Indicating, U-phase current using I _u Indicating, for V-phase current I _v Indicating that W-phase current is by I _w This means that the following holds:

P＝U _u *I _u +U _v *I _v +U _w *I _w 。

through the above, the embodiment of the application provides a scheme for determining the second power through the operation data of the fan.

S250, selecting one of the first power and the second powers as a target power;

specifically, in the step S210, it is mentioned that, when the first power in the stored first corresponding relationship is the maximum power corresponding to the rotational speed of the fan, in this step, the target power is the maximum fan power of the fan at the current target rotational speed; and when the first power is the minimum power corresponding to the rotating speed of the fan, the target power is the minimum fan power of the fan at the current target rotating speed. For convenience of explanation, in the embodiment of the present application, the target power is taken as the maximum fan power of the fan at the current target rotation speed as an example for explanation.

In this step, the plurality of second powers obtained by calculation in step S240 are compared with the first power determined in step S210, and when the first power is the maximum value, that is, the first power is greater than all the second powers, it indicates that the maximum operating power of the fan is the first power at the target rotation speed, and the first power is taken as the target power in the embodiment of the present application.

When any one second power is larger than the first power, the following is stated: due to the fact that the air guide part is touched manually, the motor is in fault connection with the air guide part and the mechanical structure of the motor is aged and dirty, and the like, the driving angle of the motor in operation has errors, and therefore the fan cannot operate at the maximum operation power when the motor operates to the driving angle corresponding to the maximum operation power of the fan at the target rotating speed. In this case, the maximum operating power of the fan has changed, and therefore, the maximum value of all the second powers is taken as the new target power.

S260, controlling the motor to run to a target driving angle of the motor corresponding to the target power;

specifically, in the above step S210, the first power corresponds to the first driving angle. Therefore, when it is determined that the target power is the first power through the above step S250, it may be determined that the target driving angle corresponding to the target power is the first driving angle.

In step S240, the correspondence relationship between the second power and the second driving angle is described. Therefore, when it is determined that the target power is the largest one of the second powers through the above step S250, it may be determined that the target driving angle is the second driving angle corresponding to the largest second power.

It should be noted that, in the process of adjusting the driving angle of the motor for multiple times, different second driving angles may correspond to the same second power, and the reason for this may be that the angular displacement of the motor for each adjustment is relatively small, and the influence on the second power of the motor is not obvious; or the two different second driving angles are symmetrical relative to the first driving angle, so that the influence of the different driving angles on the fan power is the same.

Therefore, when different second driving angles correspond to the same second power, different selection rules can be preset to determine one of the second driving angles as the target driving angle. For example, the second driving angle closest to the first driving angle may be set as the target driving angle, and the angular displacement amount of the motor driving angle may be reduced. Alternatively, the second driving angle closest to the initial position of the motor may be selected as the target driving angle, and the angular displacement of the motor driving angle may be reduced when the air guide member is closed.

And when the target driving angle of the motor corresponding to the target power of the fan at the current target rotating speed of the fan is determined, controlling the motor to operate to the target driving angle.

It can be understood that if the target driving angle of the motor is the first driving angle, the motor is controlled to return to the first driving angle; and if the target driving angle is any second driving angle, controlling the motor to operate to the second driving angle.

After the motor is operated to a target driving angle, the fan can be stably operated at the maximum target power at the current target rotation speed.

S270, controlling the motor to return to the initial position according to the target driving angle;

in particular, the motor should be reversed back to the initial position when full closure of the air guiding components is required. In the above steps S200 to S260, the motor is already controlled to operate to the target driving angle in the embodiment of the present application, so that in this step, the motor can accurately operate to the initial position by reversing the target driving angle, so that the air guiding component is completely closed, and dust is prevented from entering the indoor unit.

Through steps S200 to S270, an embodiment of the present application provides an indoor unit control method, where first, a first power of a fan and a first driving angle of a corresponding motor may be determined according to a target rotation speed of the fan through a first corresponding relationship stored in an indoor unit, when the driving angle of the motor is the first driving angle and the fan stably operates at the target rotation speed, the driving angle of the motor is adjusted multiple times and second powers corresponding to different second driving angles are calculated under the condition that the rotation speed of the fan is not changed, and whether the first power is the maximum operating power of the fan at a current target rotation speed is checked by comparing the first power with the multiple second powers. When the first power is larger than all the second powers, determining that the target driving angle is the first driving angle; and if any second power is larger than the first power, determining a second driving angle corresponding to the second power with the maximum target driving angle. And controlling the motor to run to a target driving angle, and when the air guide part needs to be closed, controlling the motor to reversely rotate to the target driving angle so as to accurately return to the initial position. The control method for the indoor unit, provided by the embodiment of the application, can enable the motor to accurately return to the initial position on the premise of not increasing a hardware structure, reduces the situations of motor heating and power consumption increase caused by excessive motor reversal, reduces the abnormal stress situation of a mechanical structure between the air guide part and the motor, and is beneficial to prolonging the service life of the mechanical structure. The invention has low cost and can be widely applied to the technical field of air conditioners.

In some embodiments, according to the above steps S200 to S260, it is already determined that the maximum power of the fan corresponding to the current target rotation speed of the fan is the target power, and the target driving angle corresponding to the target power is determined, so that the first corresponding relationship stored in the indoor unit can be updated according to the target power and the target driving angle, and when the air guiding component is opened or closed next time, the motor can operate to the accurate driving angle, and can also accurately reverse to the initial position.

Moreover, according to the above-mentioned contents, if the first corresponding relationship is updated according to the determined target power and the target driving angle after each air guiding adjustment instruction, a periodic air guiding adjustment instruction may also be set, for example, a power-on instruction or a power-off instruction every 10 times is set to trigger one air guiding adjustment instruction, and the number of times of detection is reduced under the condition that the fan power and the motor driving angle corresponding to the target rotation speed of the fan are ensured to be correct as much as possible, which is beneficial to reducing the loss of the mechanical structure connecting the air guiding component and the motor by adjusting the motor driving angle for many times.

Through the above embodiments, the present application provides a control method for an indoor unit, by which a true maximum power (i.e., a target power) of a fan at a current target rotation speed and a corresponding target driving angle can be determined, and after a shutdown instruction is received, a motor is reversed with the target driving angle as a reference, so that the motor is accurately returned to an initial position. However, it is also mentioned above that the reason why the motor in the embodiment of the present application is inaccurate in the air guiding angle is that the motor used in many air conditioners is a stepping motor without feedback, and the motor cannot obtain the current driving angle, so that the air guiding angle is easily mistaken because the air guiding component is touched by a person. After the target driving angle is determined according to the above content, if the air guide part is touched manually again, the motor still cannot return to the initial position accurately.

Based on the above problem, the embodiment of the present application further provides a scheme for checking whether the wind guide component is manually touched after the motor runs to the target driving angle, and if the wind guide component is manually touched, adjusting the motor back to the target driving angle. In the above, it is mentioned that, under the condition of maintaining the current rotation speed of the fan, the change of the driving angle of the motor (i.e. the change of the opening degree of the air guiding component) affects the real-time power of the driving motor in the fan, and the power can be obtained by calculation according to the operation data of the fan. That is, when the wind guide part is considered to touch, the opening degree of the wind guide part changes, and the change is reflected on the real-time power of the fan to a certain extent.

Referring to fig. 4, fig. 4 is a flowchart illustrating steps of adjusting the motor back to the target driving angle according to some embodiments of the present invention. The method includes, but is not limited to, steps S400-S410:

s400, when the motor runs to a target driving angle, periodically acquiring running data according to a preset detection period, and calculating third power of the fan according to the running data;

specifically, according to the steps S200 to S270 in the above description, the motor is controlled to operate to the calculated target driving angle, and then the indoor unit starts to periodically acquire the operation data of the fan according to a preset detection period, that is, as mentioned in the step S230, the operation data of the driving motor in the fan, that is, the operation parameters of the driving motor, and selects different calculation methods according to different types of driving motors, and calculates the real-time power of the fan according to the operation data, and these powers are referred to as third power.

S410, when the difference value between two third powers corresponding to any adjacent detection periods is larger than a preset third threshold value, generating a wind guide adjusting instruction;

specifically, it is mentioned in the above that, if the motor has been operated to the target driving angle and the fan is stably operated at the current target rotation speed, the third power of the fan should be kept unchanged or fluctuate little in an ideal state. However, if the air guide member is touched by a person, the opening degree of the air guide member is suddenly changed, thereby affecting the third power of the fan. Therefore, the two third powers corresponding to the adjacent detection periods are compared, and if the difference value between the two third powers is greater than the preset third threshold value, that is, it is explained that the real-time power of the fan changes due to the sudden change of the opening degree of the air guiding component, so that it can be determined that the current driving angle of the motor deviates from the target driving angle to some extent and needs to be readjusted.

As mentioned above, in the embodiment of the present invention, the motor for driving the air guiding component is a low-cost and feedback-free stepping motor, so that although it is known that the driving angle of the motor is manually changed, the angle difference between the current driving angle and the target driving angle cannot be accurately obtained, and therefore, when the difference between two third powers corresponding to any two adjacent detection periods is greater than the preset third threshold, the air guiding adjustment instruction is regenerated, and according to the above steps S200 to S260, the target driving angle is determined again, and the motor is controlled to return to the correct target driving angle.

It should be noted that there is not necessarily a linear influence between the opening of the air guiding component and the real-time power of the fan, but the influence of the opening change of the air guiding component on the real-time power of the fan can be determined through a large number of experiments, and the corresponding relationship is stored in the indoor unit, so as to implement the above steps S400 to S410.

Through steps S400 to S410, the embodiment of the present application further provides a scheme for determining whether to readjust the driving angle of the motor according to the real-time power change in the adjacent detection period of the fan, so as to more effectively ensure that the motor can accurately operate to the target driving angle, and can accurately rotate back to the initial position according to the target driving angle, the motor does not generate less energy to cause the wind guide component to be incompletely closed, and does not generate more energy to cause the motor to generate heat excessively and cause abnormal stress on the mechanical structure, which is beneficial to prolonging the service lives of the motor and the mechanical structure connecting the wind guide component.

In summary, by combining one or more of the above embodiments, the present invention provides an indoor unit control method, which first generates a wind guiding adjustment instruction in response to a power-on instruction or a power-off instruction; responding to the air guide adjusting instruction, acquiring a first parameter of the indoor unit, and acquiring a target rotating speed of the fan according to the first parameter and the second corresponding relation; determining a first power of a fan and a first driving angle of a motor according to the target rotating speed and a first corresponding relation stored in the indoor unit; when the driving angle of the motor is stabilized at a first driving angle and the stable operation of the fan at the target rotating speed exceeds a first preset time, keeping the rotating speed of the fan unchanged, adjusting the driving angle of the motor for multiple times according to a preset adjusting step length, and determining a second driving angle; calculating to obtain a second power of the fan corresponding to the second driving angle by obtaining the operation data of the fan at the second driving angle; when the adjusting condition is met, determining that the maximum value of the first power and the second power is the target power of the fan, and determining a target driving angle of the motor corresponding to the target power; controlling the motor to operate to a target driving angle; updating the first corresponding relation according to the target power and the target driving angle; after the motor runs to a target driving angle, periodically acquiring running data of the fan and calculating fourth power, and determining whether the air guide component is manually touched according to a difference value between adjacent fourth power so as to determine whether an air guide adjusting instruction needs to be generated again; and controlling the motor to return to the initial position according to the target driving angle. The invention can make the motor return to the initial position accurately, reduce the probability of the motor heating, thus reduce the power consumption of the motor; and the condition that the mechanical structure related to the air guide component is excessively stressed can be reduced, and the service life of the air guide component is effectively prolonged. After the motor runs to a target driving angle, whether the air guide component is touched manually or not can be determined according to the change of the real-time power of the fan, and the motor can be kept at the target driving angle as far as possible. The invention does not need to add other hardware structures, has lower cost and can be widely applied to the technical field of air conditioners.

Referring to fig. 5, fig. 5 is a schematic view of an indoor unit control device according to some embodiments of the present invention, which can be applied to the indoor unit shown in fig. 1, where the device 500 includes a first module 510, a second module 520, a third module 530, a fourth module 540, a fifth module 550, a sixth module 560, a seventh module 570, and an eighth module 580. The first module is used for responding to the air guide adjusting instruction and acquiring the target rotating speed of the fan; the second module is used for determining a first power of the fan and a first driving angle of the motor according to the target rotating speed and a preset first corresponding relation; the third module is used for adjusting the driving angle of the motor for multiple times and determining a plurality of second driving angles after the driving angle of the motor is the first driving angle and the fan runs at the target rotating speed for a first preset time; the fourth module is used for determining a plurality of second powers of the fan corresponding to a plurality of second driving angles; a fifth module for determining a maximum of the first power and the plurality of second powers as a target power; the sixth module is used for determining a target driving angle of the motor corresponding to the target power; the seventh module is used for controlling the motor to operate to a target driving angle; the eighth module is used for controlling the motor to return to the initial position according to the target driving angle.

In addition, an embodiment of the present invention further provides a control apparatus, referring to fig. 6, fig. 6 is a schematic diagram of a control apparatus according to some embodiments of the present invention, where the control apparatus 600 includes at least one processor 610, and further includes at least one memory 620 for storing at least one program; one processor and one memory are exemplified in fig. 6.

The processor and memory may be connected by a bus or other means, such as by a bus in FIG. 6.

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

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

In addition, an embodiment of the present invention further provides an air conditioning system, where the air conditioning system includes an outdoor unit as shown in fig. 1, and the indoor unit is equipped with a control device of the indoor unit provided in the embodiment of the present invention, and may be used to execute a control method of the indoor unit provided in the embodiment of the present invention.

The embodiment of the invention also discloses a computer storage medium, wherein a program executable by a processor is stored, and the program executable by the processor is used for realizing the indoor unit control method provided by the invention when being executed by the processor.

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

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.

Claims

1. The indoor unit control method is characterized in that the indoor unit comprises a fan, a motor and an air guide component, wherein the motor is used for controlling the opening of the air guide component through an output driving angle; the control method comprises the following steps:

responding to a wind guide adjusting instruction, and acquiring a target rotating speed of the fan;

determining a first power of the fan and a first driving angle of the motor according to the target rotating speed and a preset first corresponding relation; the first power is the maximum power or the minimum power of a driving motor of the fan in the process that the fan stably runs at the target rotating speed;

controlling the motor to drive to the first driving angle and the fan to operate at the target rotating speed;

the motor keeps the first driving angle, and after the fan runs for a first preset time at the target rotating speed, the driving angle of the motor is adjusted for multiple times, so that a plurality of second driving angles are obtained; the first preset time is the time required for the rotating speed of the fan to reach a stable state;

determining a plurality of second powers of the fan corresponding to the plurality of second driving angles;

selecting one of the first power and the plurality of second powers as a target power; when the first power is the maximum power corresponding to the rotating speed of the fan, the target power is the maximum fan power of the fan at the current target rotating speed; when the first power is the minimum power corresponding to the rotating speed of the fan, the target power is the minimum fan power of the fan at the current target rotating speed;

controlling the motor to operate to a target driving angle of the motor corresponding to the target power;

and controlling the motor to return to the initial position according to the target driving angle.

2. The indoor unit control method according to claim 1, further comprising:

and responding to a starting instruction or a shutdown instruction, and determining the air guide adjusting instruction.

3. The indoor unit control method according to claim 1, wherein the obtaining of the target rotation speed of the fan in response to the air guide adjustment command includes:

responding to the air guide adjusting instruction, and acquiring a first parameter of the indoor unit;

determining a target rotating speed of the fan according to the first parameter and a preset second corresponding relation;

wherein the first parameter includes at least one of a set temperature and a set wind speed of the indoor unit.

4. The indoor unit control method according to claim 1, wherein the adjusting the driving angle of the motor a plurality of times and determining a plurality of second driving angles includes:

adjusting the driving angle of the motor for multiple times according to a preset adjusting step length to determine a plurality of second driving angles;

and the second driving angle is the sum of the current driving angle of the motor and the adjusting step length.

5. The indoor unit control method according to claim 1, wherein the determining a plurality of second powers of the fan corresponding to a plurality of the second driving angles includes:

after each adjustment, acquiring the operation data of the fan corresponding to the current second driving angle;

determining the second power according to the operating data;

and the operation data is the operation parameters of the fan.

6. The indoor unit control method according to claim 5, wherein,

the operational data includes a torque and a mechanical speed of the fan;

or the operation data comprises direct-axis voltage, quadrature-axis voltage, direct-axis current and quadrature-axis current of the fan;

or the operation data comprises a U-phase voltage, a V-phase voltage, a W-phase voltage, a U-phase current, a V-phase current and a W-phase current of the fan.

7. The indoor unit control method according to claim 1, wherein the selecting one of the first power and the plurality of second powers as a target power includes:

determining a maximum value of the first power and a plurality of the second powers as the target power.

8. The indoor unit control method according to claim 1, further comprising:

when the adjusting times are larger than a preset first threshold value, stopping adjusting the driving angle of the motor;

or when the difference value between the second driving angle and the first driving angle is greater than or equal to a preset second threshold value, stopping adjusting the driving angle of the motor.

9. The indoor unit control method according to claim 1, wherein the control method further comprises:

and updating the first corresponding relation according to the target rotating speed, the target power and the target driving angle.

10. The indoor unit control method according to claim 5, further comprising:

when the motor runs to the target driving angle, periodically acquiring the running data according to a preset detection period, and calculating third power of the fan according to the running data;

and when the difference value between two third powers corresponding to any adjacent detection periods is greater than a preset third threshold value, generating the air guide adjusting instruction.

11. The utility model provides an indoor unit controlling means, its characterized in that, indoor unit includes fan, motor and wind-guiding part, the motor is used for through the drive angle control of output the aperture of wind-guiding part, controlling means includes:

the first module is used for responding to a wind guide adjusting instruction and acquiring a target rotating speed of the fan;

the second module is used for determining a first power of the fan and a first driving angle of the motor according to the target rotating speed and a preset first corresponding relation; the first power is the maximum power or the minimum power of a driving motor of the fan in the process that the fan stably runs at the target rotating speed;

the third module is used for controlling the motor to be driven to the first driving angle from an initial position and controlling the fan to run at the target rotating speed;

the fourth module is used for keeping the first driving angle by the motor, and regulating the driving angle of the motor for multiple times after the fan operates at the target rotating speed for a first preset time so as to obtain multiple second driving angles; the first preset time is the time required for the rotating speed of the fan to reach a stable state;

a fifth module, configured to determine a plurality of second powers of the fan corresponding to a plurality of the second driving angles;

a sixth module, configured to select one of the first power and the plurality of second powers as a target power; when the first power is the maximum power corresponding to the rotating speed of the fan, the target power is the maximum fan power of the fan at the current target rotating speed; when the first power is the minimum power corresponding to the rotating speed of the fan, the target power is the minimum fan power of the fan at the current target rotating speed;

the seventh module is used for controlling the motor to operate to a target driving angle of the motor corresponding to the target power;

and the eighth module is used for controlling the motor to return to the initial position according to the target driving angle.

12. A control device, comprising:

at least one processor;

at least one memory for storing at least one program;

when at least one of the programs is executed by at least one of the processors, the at least one of the processors is enabled to implement the indoor unit control method according to any one of claims 1 to 10.

13. An air conditioning system characterized by comprising an indoor unit according to any one of claims 1 to 10.

14. A computer storage medium in which a program executable by a processor is stored, wherein the program executable by the processor is used for implementing the indoor unit control method according to any one of claims 1 to 10 when executed by the processor.