CN114811929A - Air conditioner indoor unit, control method and air conditioner - Google Patents
Air conditioner indoor unit, control method and air conditioner Download PDFInfo
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- CN114811929A CN114811929A CN202210410811.3A CN202210410811A CN114811929A CN 114811929 A CN114811929 A CN 114811929A CN 202210410811 A CN202210410811 A CN 202210410811A CN 114811929 A CN114811929 A CN 114811929A
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- 230000008569 process Effects 0.000 claims description 4
- 239000002699 waste material Substances 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner indoor unit, a control method and an air conditioner.A variable torque device is arranged on a motor output shaft or a guide plate rotating shaft, when a guide plate is driven by a motor to rotate, the motor applies force to the variable torque device, and the variable torque device is stressed and twisted; the torque of the torque-variable devices is different in size due to different rotation angles of the motors; the controller obtains a guide plate target angle and a motor actual current value; obtaining a motor target current value corresponding to the guide plate target angle according to a preset corresponding relation between the guide plate angle and the motor current value; if the actual current value of the motor is not equal to the target current value of the motor, the motor drives the guide plate to continue rotating; if the actual current value of the motor is equal to the target current value of the motor, the motor and the guide plate stop rotating; therefore, the guide plate can be accurately controlled to rotate without generating the step sound, the problem of long-time guide plate resetting action is not generated, the electric energy waste is avoided, and the problem of easily generating the step sound is solved.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to an air conditioner indoor unit, a control method and an air conditioner.
Background
The indoor machine of the existing air conditioner has guide plates and swing blades in various forms, and the guide plates are driven by a stepping motor to control the angles and the positions of the guide plates so as to realize the change of indoor wind directions. Due to the characteristics of the stepping motor, the guide plate needs to be reset every time the machine is started or stopped, and the position of the guide plate is accurate and does not deviate. But also lead to step motor drive baffle when reseing simultaneously, produce the mistake tone problem, especially heterotypic baffle that appears now, super large baffle isotructure needs bigger step motor drive, and longer mistake step time ensures that the baffle resets, leads to the air conditioner to appear longer baffle when switching on and shutting down and resets latency to and the mistake tone problem.
Aiming at the technical problem, the guide plate can be completely reset through the reasonable design of the step number of the stepping motor, and excessive step sound cannot be generated at the same time. The reset step number of the stepping motor set in the system is a fixed value, and the position of the guide plate cannot be directly judged in the actual operation process of the stepping motor. Referring to fig. 1 to 3, the indoor unit of the air conditioner comprises an indoor heat exchanger 1, an electric auxiliary heating device 2, a cross-flow fan 3, a stepping motor 4, a guide plate 5, a shell 6 and the like, wherein the shell 6 is provided with an air outlet 6-1; the stepping motor 4 drives the guide plate 5 to rotate so as to open or shield the air outlet 6-1. Fig. 1 shows the guiding plate 5 at a fully open angle a, fig. 2 shows the guiding plate 5 at a fully closed angle C, and fig. 3 shows the guiding plate 5 at an intermediate angle B.
Assuming that the operation of the stepper motor 4 for 1000 steps is required to move the flipper 5 from the angle a to the angle C position under normal conditions, a number of steps of 1100 steps or more is typically set in the system to ensure that the flipper 5 is fully reset. Therefore, the step-out sound is generated in 100 steps. Assuming angle B as the neutral position, i.e., angle B to angle C, normally 500 steps are required. If the guide plate 5 is just at the position when the air conditioner is powered off accidentally, the guide plate 5 needs the stepping motor 4 to run for 1100 steps when being powered on again, and at this time, 600 steps of time are required to be reset in an over-step mode, so that extra power waste and over-step sound problems are caused.
Disclosure of Invention
The invention provides an air conditioner indoor unit, which solves the problem that the step-out sound is easy to occur.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
an indoor unit of an air conditioner, comprising:
a housing having an air outlet;
the rotating shaft of the guide plate is rotationally connected with the shell;
the output shaft of the motor is connected with the rotating shaft of the guide plate;
the torque changing device is connected with an output shaft of the motor or a rotating shaft of the guide plate; when the rotation angle of the motor or the guide plate is changed, the torque of the torque-variable device is also changed;
a controller configured to:
acquiring a guide plate target angle and an actual current value of a motor; obtaining a motor target current value corresponding to the guide plate target angle according to a preset corresponding relation between the guide plate angle and the motor current value;
if the actual current value of the motor is not equal to the target current value of the motor, the motor drives the guide plate to continue rotating;
and if the actual current value of the motor is equal to the target current value of the motor, stopping the rotation of the motor and the guide plate.
In some embodiments of the present application, the torque converter is a torque spring, the torque spring is sleeved on the output shaft of the motor, one end of the torque spring is connected to the output shaft of the motor, and the other end of the torque spring is connected to the housing.
In some embodiments of this application, the torque converter is torque spring, torque spring cover is established in the pivot of baffle, torque spring's one end with the pivot of baffle is connected, torque spring's the other end with the casing is connected.
In some embodiments of the present application, the torque converter is a spring coupled to an output shaft of the motor.
In some embodiments of the present application, the torque converter is a spring, and the spring is connected to the rotating shaft of the guide plate.
In some embodiments of the present application, the torque converter comprises a cam and a spring; one end of the elastic sheet is connected with the shell, and the other end of the elastic sheet is abutted against the outer contour surface of the cam; and the shaft of the cam is connected with the output shaft of the motor or the rotating shaft of the guide plate.
A control method of an air conditioner indoor unit is characterized in that a torque-variable device is arranged on an output shaft of a motor of the air conditioner indoor unit or a rotating shaft of a guide plate;
the control method comprises the following steps:
acquiring a guide plate target angle and an actual current value of a motor; obtaining a motor target current value corresponding to the guide plate target angle according to a preset corresponding relation between the guide plate angle and the motor current value;
judging whether the actual current value of the motor is equal to the target current value of the motor or not;
if the actual current value of the motor is not equal to the target current value of the motor, the motor drives the guide plate to continue rotating;
and if the actual current value of the motor is equal to the target current value of the motor, stopping the rotation of the motor and the guide plate.
In some embodiments of the present application, the relationship between the guide plate angle and the motor current value is a mapping table or a relationship curve.
In some embodiments of the present application, when the corresponding relationship between the guide plate angle and the motor current value is preset, in the process of rotating the guide plate from the minimum angle to the maximum angle by the motor driving, the rotation angle and the motor current value of the guide plate are recorded once every time the set step length is increased for the rotation angle of the guide plate, so as to form a corresponding table of the guide plate angle and the motor current value.
An air conditioner comprises the air conditioner indoor unit.
Compared with the prior art, the invention has the advantages and positive effects that: according to the air conditioner indoor unit, the control method and the air conditioner, the variable torque device is arranged on the output shaft of the motor or the rotating shaft of the guide plate, when the motor drives the guide plate to rotate, the force is applied to the variable torque device, and the variable torque device is stressed and twisted; the torque of the torque-variable devices is different in size due to different rotation angles of the motors; the controller obtains a guide plate target angle and a motor actual current value; obtaining a motor target current value corresponding to the guide plate target angle according to a preset corresponding relation between the guide plate angle and the motor current value; if the actual current value of the motor is not equal to the target current value of the motor, the motor drives the guide plate to continue rotating; if the actual current value of the motor is equal to the target current value of the motor, the motor and the guide plate stop rotating; therefore, the guide plate can be accurately controlled to rotate without generating the step sound, the problem of long-time guide plate resetting action is not generated, the electric energy waste is avoided, and the problem of easily generating the step sound is solved.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of the guide plate of the indoor unit of an air conditioner when the guide plate is fully opened;
FIG. 2 is a schematic view of the guide plate of the indoor unit of the air conditioner when the guide plate is completely closed;
FIG. 3 is a schematic view of the guide plate of the indoor unit of the air conditioner in a half-opened state;
fig. 4 is a schematic structural diagram of an embodiment of an indoor unit of an air conditioner in accordance with the present invention;
fig. 5 is a flowchart illustrating an embodiment of a method for controlling an indoor unit of an air conditioner according to the present invention;
fig. 6 is a flowchart illustrating a method for controlling an indoor unit of an air conditioner according to another embodiment of the present invention.
Reference numerals:
1. an indoor heat exchanger; 2. an electric auxiliary heating device; 3. a cross-flow fan;
4. a motor; 4-1, an output shaft;
5. a guide plate; 5-1, a guide plate main body; 5-2, connecting rod; 5-3, a rotating shaft;
6. a housing; 6-1 and an air outlet;
7. and a variable torque device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "upper," "lower," "front," "back," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
The invention provides an air conditioner indoor unit, a control method and an air conditioner, aiming at the technical problem that the conventional air conditioner indoor unit is easy to generate an over-step sound, and the over-step sound is prevented from being generated and electric energy waste is avoided. The following describes an air conditioner indoor unit, a control method and an air conditioner in detail with reference to the accompanying drawings.
Fig. 1, 2 and 3 are schematic diagrams of an air conditioner indoor unit, which respectively show a guide plate 5 of the air conditioner indoor unit at a fully open angle a, a fully closed angle C and an intermediate angle B. The motor rotates, and then drives the guide plate to rotate. In the present application, the motor is preferably a stepping motor so as to control the rotation of the motor. Of course, other motors can be selected according to actual requirements.
The first embodiment,
The air conditioner indoor unit of the present embodiment includes a housing 6, a guide plate 5, a motor 4, a torque converter 7, a controller, and the like, as shown in fig. 4.
And a housing 6 having an outlet 6-1.
And the rotating shaft 5-3 of the guide plate 5 is rotationally connected with the shell 6.
An output shaft 4-1 of the motor 4 is connected with a rotating shaft 5-3 of the guide plate; the motor 4 rotates to drive the guide plate 5 to rotate.
And the variable torque device 7 is connected with the output shaft 4-1 of the motor 4 or the rotating shaft 5-3 of the guide plate 5. When the rotation angle of the motor 4 or the guide plate 5 is changed, the torque of the torque converter 7 is also changed. The torque of the torque converter 7 is changed according to the change of the rotation angle of the motor 4 or the guide plate 5. The rotation angles of the motor 4 or the guide plate 5 are different, and the torque of the torque-variable device 7 is also different. The torque of the torque-variable device corresponds to the rotation angle of the motor 4 or the guide plate 5.
And the controller is used for controlling the rotation of the motor 4 and the operation of the whole air conditioner indoor unit.
The variable torque device is a device with different torque required under different rotation angles. The variable torque device can be connected with the guide plate 5 or directly connected with the stepping motor 4.
The stepping motor drives the guide plate to rotate, and the torque-changing device is simultaneously stressed and twisted. Because the torque of the torque-changing device is determined after being twisted and the torque is gradually increased, the driving force and the corresponding current required by the stepping motor to drive the guide plate to rotate are also gradually increased.
When the guide plate is driven to rotate by the stepping motor, different torques corresponding to the torque-variable devices at different rotation angles are different, and the currents are different due to the fact that the stepping motor needs to rotate at different angles, and therefore the real-time position of the guide plate can be directly judged by monitoring the current value of the motor. The corresponding relation between the angle of the guide plate and the current of the stepping motor is preset, and the actual angle of the guide plate can be judged by monitoring the real-time current value of the stepping motor.
Accordingly, the controller is configured to:
acquiring a guide plate target angle and an actual current value of a motor; obtaining a motor target current value corresponding to the guide plate target angle according to a preset corresponding relation between the guide plate angle and the motor current value;
if the actual current value of the motor is not equal to the target current value of the motor, the guide plate is not reached to the target angle, and the motor drives the guide plate to continue rotating;
if the actual current value of the motor is equal to the target current value of the motor, the guide plate reaches the target angle, the motor and the guide plate stop rotating, electric energy waste is avoided, and step noise is prevented from being generated.
In the air conditioner indoor unit of the embodiment, the torque-variable device is arranged on the output shaft of the motor or the rotating shaft of the guide plate, when the guide plate is driven by the motor to rotate, the force is applied to the torque-variable device, and the torque-variable device is stressed and twisted; the torque of the torque-variable device is different in size due to different rotation angles of the motors; the controller obtains a guide plate target angle and a motor actual current value; obtaining a motor target current value corresponding to the guide plate target angle according to a preset corresponding relation between the guide plate angle and the motor current value; if the actual current value of the motor is not equal to the target current value of the motor, the motor drives the guide plate to continue rotating; if the actual current value of the motor is equal to the target current value of the motor, the motor and the guide plate stop rotating; therefore, the guide plate can be accurately controlled to rotate without generating the step sound, the problem of long-time guide plate resetting action is not generated, the electric energy waste is avoided, and the problem of easily generating the step sound is solved.
In one embodiment of the present application, the torque converter 7 is a torque spring, the torque spring is sleeved on the output shaft 4-1 of the motor 4, one end of the torque spring is connected to the output shaft 4-1 of the motor 4, and the other end of the torque spring is connected to the housing 6. When the motor 4 rotates, a force is applied to the torque spring, the torque spring is twisted, so that the torque force of the torque spring is changed, and the current value required by the motor 4 to drive the guide plate 5 is also changed. The torque spring has low cost, light weight and convenient disassembly and assembly.
In one embodiment of the present application, the torque converter 7 is a torque spring, the torque spring is sleeved on the rotating shaft 5-3 of the guide plate 5, one end of the torque spring is connected with the rotating shaft 5-3 of the guide plate 5, and the other end of the torque spring is connected with the housing 6. When the motor 4 rotates, the guide plate 5 is driven to rotate, when the guide plate 5 rotates, the torque spring is applied with force, the torque spring is twisted, the torque force of the torque spring is changed, and the current value required by the motor 4 for driving the guide plate 5 is also changed. The torque spring has low cost, light weight and convenient disassembly and assembly.
In one embodiment of the present application, the torque converter 7 is a spring connected to the output shaft 4-1 of the motor 4. The spring is a coiled sheet steel strip. When the motor 4 rotates, force is applied to the spring to twist the spring, so that the torque force of the spring is changed, and the current value required by the motor 4 to drive the guide plate 5 is also changed. The clockwork spring is low in cost, light in weight and convenient to disassemble and assemble.
In one embodiment of the present application, the torque converter 7 is a spring, which is connected to the shaft 5-3 of the guide plate 5. The spring is a coiled sheet steel strip. When the motor 4 rotates, the guide plate 5 is driven to rotate, the guide plate 5 applies force to the spring when rotating, the spring is twisted, the torque force of the spring is changed, and the current value required by the motor 4 for driving the guide plate 5 is also changed. The clockwork spring is low in cost, light in weight and convenient to disassemble and assemble.
In one embodiment of the present application, the torque converter 7 includes a cam and a spring plate; one end of the elastic sheet is connected with the shell 6, and the other end of the elastic sheet is abutted against the outer contour surface of the cam; the shaft of the cam is connected with an output shaft 4-1 of the motor 4 or a rotating shaft 5-3 of the guide plate 5. Because the distance between the outer contour surface of the cam and the shaft of the cam is different, the force applied by the outer contour surface to the elastic sheet is different when the cam rotates.
When the shaft of the cam is connected with the output shaft 4-1 of the motor 4, the motor 4 rotates to drive the cam to rotate, the outer contour surface of the cam applies force to the elastic sheet, so that the torque force of the elastic sheet is changed, and the current value required by the motor 4 to drive the guide plate 5 is also changed. The cam and the elastic sheet have low cost and light weight, and are convenient to disassemble and assemble.
When the shaft of the cam is connected with the rotating shaft 5-3 of the guide plate 5, the motor 4 rotates to drive the guide plate 5 to rotate, the guide plate 5 drives the cam to rotate, the outer contour surface of the cam applies force to the elastic sheet, so that the torque force of the elastic sheet is changed, and the current value required by the motor 4 to drive the guide plate 5 is also changed. The cam and the elastic sheet have low cost and light weight, and are convenient to disassemble and assemble.
In the present embodiment, the guide plate 5 includes a guide plate main body 5-1, two connecting rods 5-2, and two rotating shafts 5-3, as shown in FIG. 4; two ends of the guide plate main body 5-1 in the length direction are respectively provided with a connecting rod 5-2, and the connecting rods 5-2 are fixedly connected with the rotating shafts 5-3.
For example, referring to fig. 4, the guide plate 5 includes a left link, a right link, a left rotation shaft, and a right rotation shaft; the left connecting rod is fixed at the left end of the guide plate main body 5-1, and the right connecting rod is fixed at the right end of the guide plate main body 5-1; the left rotating shaft is fixedly connected with the left connecting rod, and the right rotating shaft is fixedly connected with the right connecting rod. The left rotating shaft is rotatably connected with the shell 6, and the right rotating shaft is rotatably connected with the shell 6. The stepping motor 4 is fixedly connected with the right rotating shaft and drives the right rotating shaft to rotate, and then the right connecting rod, the guide plate main body, the left connecting rod and the left rotating shaft are driven to rotate, so that the whole guide plate 5 rotates.
In this embodiment, the torque converter is disposed on the stepping motor or the guide plate shaft. The problem that the guide plate can be accurately controlled to rotate without generating step sound or resetting the guide plate for a long time by monitoring the current of the stepping motor and matching with a torque-variable device is solved.
The air conditioner indoor unit of the embodiment is combined with the stepping motor through the torque-variable device, so that when the stepping motor drives the guide plate, current values generated at different angles are determined, the real-time position of the guide plate can be determined, and the guide plate is accurately controlled to reset or act.
Example II,
Based on the design of the air conditioner indoor unit of the first embodiment, the second embodiment provides a control method of the air conditioner indoor unit.
A torque-changing device is arranged on an output shaft of a motor of an indoor unit of the air conditioner or a rotating shaft of a guide plate; the rotation angles of the motor or the guide plate are different, and the torque of the torque-variable device is different.
The method for controlling the indoor unit of the air conditioner in the embodiment mainly comprises the following steps, which are shown in fig. 5.
Step S1: and acquiring a guide plate target angle and an actual current value of the motor.
And the controller receives the control command and analyzes the guide plate target angle according to the control command.
And the actual current value of the motor is monitored in real time through a current sensor.
Step S2: and obtaining a motor target current value corresponding to the guide plate target angle according to the preset corresponding relation between the guide plate angle and the motor current value.
Step S3: and judging whether the actual current value of the motor is equal to the target current value of the motor.
If the actual current value of the motor is not equal to the target current value of the motor, which indicates that the guide plate has not reached the target angle, step S4 is executed: the motor drives the guide plate to continue rotating.
If the actual current value of the motor is equal to the target current value of the motor, which indicates that the guide plate reaches the target angle, step S5 is executed: the motor and the guide plate stop rotating, so that the electric energy waste is avoided, and the generation of step noise is prevented.
In the control method of the air conditioner indoor unit, the torque-changing device is arranged on the output shaft of the motor or the rotating shaft of the guide plate, when the motor drives the guide plate to rotate, the force is applied to the torque-changing device, and the torque-changing device is stressed and twisted; the torque of the torque-variable devices is different in size due to different rotation angles of the motors; acquiring a guide plate target angle and an actual current value of a motor; obtaining a motor target current value corresponding to the guide plate target angle according to a preset corresponding relation between the guide plate angle and the motor current value; if the actual current value of the motor is not equal to the target current value of the motor, the motor drives the guide plate to continue rotating; if the actual current value of the motor is equal to the target current value of the motor, the motor and the guide plate stop rotating; therefore, the guide plate can be accurately controlled to rotate without generating the step sound, the problem of long-time guide plate resetting action is not generated, the electric energy waste is avoided, and the problem of easily generating the step sound is solved.
In an embodiment of the present application, the corresponding relationship between the angle of the guide plate and the current value of the motor is a corresponding table or a corresponding curve, which is convenient for query. The corresponding relation between the angle of the guide plate and the current value of the motor is stored in a storage module of the indoor unit of the air conditioner so as to be convenient for timely query.
Through a corresponding table or a relation curve of the guide plate angle and the motor current value, the motor target current value corresponding to the guide plate target angle can be simply, conveniently, directly and quickly obtained, and the guide plate actual angle corresponding to the motor actual current value can also be conveniently obtained.
In an embodiment of the present application, when the corresponding relationship between the guide plate angle and the motor current value is preset, in the process of rotating the guide plate from the minimum angle to the maximum angle by the motor, the rotation angle of the guide plate and the motor current value are recorded once every time the rotation angle of the guide plate increases by a set step length, so as to form a corresponding table of the guide plate angle and the motor current value, as shown in table 1. Through the steps, the more accurate guide plate angle and the motor current value can be obtained, so that a more accurate corresponding table is formed and stored.
The guide plate rotates in a range from an angle C to an angle A, the angle C to the angle A are averagely divided on the assumption that the minimum angle of the guide plate is C and the maximum angle of the guide plate is A, and each angle corresponds to a current value.
For example, angle C is 0 °, angle A is 60 °, and the step size is set to 10 °. When the angle of the guide plate is 0 degree, the current value of the stepping motor is recorded to be 0.3A; the rotation angle of the guide plate is increased by 10 degrees, namely the angle of the guide plate is 10 degrees, and the current value of the stepping motor is recorded to be 0.4 ampere; the rotation angle of the guide plate is increased by 10 degrees, namely the angle of the guide plate is 20 degrees, and the current value of the stepping motor is recorded to be 0.5 ampere; … …, respectively; the rotation angle of the guide plate is increased by 10 degrees, namely the angle of the guide plate is 60 degrees, and the current value of the stepping motor is recorded to be 0.9 ampere.
TABLE 1 guide angle and stepping motor current corresponding table
| Angle of guide plate | Current/ampere of step motor |
| 0° | 0.3 |
| 10° | 0.4 |
| 20° | 0.5 |
| 30° | 0.6 |
| 40° | 0.7 |
| 50° | 0.8 |
| 60° | 0.9 |
And fitting a relation curve according to the corresponding table. The relational formula can also be obtained from the relational curve.
Hereinafter, the principle of the control method of the indoor unit of the air conditioner according to the present application will be described in detail with reference to an exemplary embodiment.
And presetting a corresponding table or curve of the guide plate angle and the motor current value. And setting a guide plate target angle by a user, and obtaining a motor target current value H corresponding to the guide plate target angle by inquiring the corresponding table. The actual current value P of the stepping motor is monitored.
The preset conditions are as follows: the motor actual current value P is equal to the motor target current value H.
When the monitored actual current value P of the motor is equal to the target current value H of the motor, the preset condition is met, and the guide plate reaches the target position set by a user.
And when the actual current value P of the motor is monitored to be less than H or more than H, the preset condition is not met.
Referring to fig. 6, the guide plate is driven by the stepping motor to act, the actual current value P of the stepping motor is monitored, a preset mapping table is inquired, and the real-time angle of the guide plate is obtained. Judging whether a preset condition is met; if the preset condition is not met, the stepping motor drives the guide plate to continue to act; if the preset conditions are met, the guide plate reaches the target angle, the motor stops rotating, and the guide plate stops rotating.
Example III,
Based on the design of the air conditioner indoor unit of the first embodiment, the third embodiment provides an air conditioner comprising the air conditioner indoor unit.
By adopting the air conditioner indoor unit, the guide plate can be accurately controlled to rotate without generating the step sound, the problem of long-time guide plate resetting action is also avoided, the electric energy waste is avoided, and the problem of easily generating the step sound is solved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. An indoor unit of an air conditioner, characterized in that: the method comprises the following steps:
a housing having an air outlet;
the rotating shaft of the guide plate is rotationally connected with the shell;
the output shaft of the motor is connected with the rotating shaft of the guide plate;
the torque changing device is connected with an output shaft of the motor or a rotating shaft of the guide plate; when the rotation angle of the motor or the guide plate is changed, the torque of the torque-variable device is also changed;
a controller configured to:
acquiring a guide plate target angle and an actual current value of a motor; obtaining a motor target current value corresponding to the guide plate target angle according to a preset corresponding relation between the guide plate angle and the motor current value;
if the actual current value of the motor is not equal to the target current value of the motor, the motor drives the guide plate to continue rotating;
and if the actual current value of the motor is equal to the target current value of the motor, stopping the rotation of the motor and the guide plate.
2. An indoor unit for an air conditioner according to claim 1, wherein: the torque-variable device is a torque spring, the torque spring is sleeved on an output shaft of the motor, one end of the torque spring is connected with the output shaft of the motor, and the other end of the torque spring is connected with the shell.
3. An indoor unit for an air conditioner according to claim 1, wherein: the torque-variable device is a torque spring, the torque spring is sleeved on the rotating shaft of the guide plate, one end of the torque spring is connected with the rotating shaft of the guide plate, and the other end of the torque spring is connected with the shell.
4. An indoor unit for an air conditioner according to claim 1, wherein: the torque-changing device is a spiral spring, and the spiral spring is connected with an output shaft of the motor.
5. An indoor unit for an air conditioner according to claim 1, wherein: the torque-changing device is a spiral spring, and the spiral spring is connected with a rotating shaft of the guide plate.
6. An indoor unit for an air conditioner according to claim 1, wherein: the torque-changing device comprises a cam and an elastic sheet; one end of the elastic sheet is connected with the shell, and the other end of the elastic sheet is abutted against the outer contour surface of the cam; and the shaft of the cam is connected with the output shaft of the motor or the rotating shaft of the guide plate.
7. A control method of an indoor unit of an air conditioner is characterized by comprising the following steps: a torque-changing device is arranged on an output shaft of a motor of the indoor unit of the air conditioner or a rotating shaft of a guide plate;
the control method comprises the following steps:
acquiring a guide plate target angle and an actual current value of a motor; obtaining a motor target current value corresponding to the guide plate target angle according to a preset corresponding relation between the guide plate angle and the motor current value;
judging whether the actual current value of the motor is equal to the target current value of the motor or not;
if the actual current value of the motor is not equal to the target current value of the motor, the motor drives the guide plate to continue rotating;
and if the actual current value of the motor is equal to the target current value of the motor, stopping the rotation of the motor and the guide plate.
8. The control method according to claim 7, characterized in that: the corresponding relation between the guide plate angle and the motor current value is a corresponding table or a corresponding relation curve.
9. The control method according to claim 8, characterized in that: when the corresponding relation between the guide plate angle and the motor current value is preset, in the process that the motor drives the guide plate to rotate from the minimum angle to the maximum angle, the rotating angle of the guide plate and the motor current value are recorded once when the set step length is increased for the rotating angle of the guide plate, and a corresponding table of the guide plate angle and the motor current value is formed.
10. An air conditioner, characterized in that: comprising an air conditioner indoor unit as claimed in any one of claims 1 to 6.
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| CN202210410811.3A CN114811929A (en) | 2022-04-19 | 2022-04-19 | Air conditioner indoor unit, control method and air conditioner |
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| CN202210410811.3A CN114811929A (en) | 2022-04-19 | 2022-04-19 | Air conditioner indoor unit, control method and air conditioner |
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