CN105222268A - Air ducting and apply its household electrical appliance - Google Patents
Air ducting and apply its household electrical appliance Download PDFInfo
- Publication number
- CN105222268A CN105222268A CN201510579513.7A CN201510579513A CN105222268A CN 105222268 A CN105222268 A CN 105222268A CN 201510579513 A CN201510579513 A CN 201510579513A CN 105222268 A CN105222268 A CN 105222268A
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- China
- Prior art keywords
- stepper motor
- metal
- inductance sensor
- channel parts
- air
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Classifications
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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
- 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
- F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
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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
- F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
- F24F2013/1433—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means with electric motors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air ducting and apply its household electrical appliance.The present invention utilizes the tooth slot structure of metal-toothed channel parts driven by stepper motors to detect the motion state of stepper motor relative to the distance change of inductance sensor when moving, thus can carry out accurate detection and control to the motion of air guide structure.
Description
Technical field
The present invention relates to field of household appliance control, be specifically related to a kind of air ducting and apply its household electrical appliance.
Background technology
Have in the household electrical appliance of air blowing function existing, such as, air-conditioning, air cooler, air purifier etc., air ducting is driven by stepper motor usually, and prior art carries out opened loop control for stepper motor, after giving stepper motor output drive signal, air guide structure actual motion state is unknown, and this is unfavorable for accurately controlling air guide structure.
Summary of the invention
In view of this, the invention provides a kind of air ducting and apply its household electrical appliance, to carry out detection and control to the motion state of air guide structure.
First aspect, provides a kind of air ducting, comprising:
Air guide structure;
Stepper motor, moves for driving described air guide structure;
Metal-toothed channel parts, rotates by described driving stepper motor, and described metal-toothed channel parts has vertically or the radial tooth slot structure extended;
Inductance sensor, be oppositely arranged with described tooth slot structure end, or be oppositely arranged with the side of described tooth slot structure, described side is parallel with the tangent line of the rotation direction of described tooth slot structure;
Inductance detection circuit, is connected with described inductance sensor, and obtain distance signal for the state change detecting described inductance sensor, described distance signal is for characterizing the distance of described inductance sensor to the surface of described metal-toothed channel parts;
Controller, for obtaining the motion state of described stepper motor according to described distance signal, and controls described stepper motor according to described motion state.
Preferably, described controller controls described stepper motor when motion state stepper motor being detected and the drive singal sent are not corresponding and quits work.
Preferably, described controller controls described stepper motor and quits work when the cycle of described distance signal exceeds scheduled time threshold value.
Preferably, the rotating speed of described controller stepper motor according to the computation of Period of described distance signal.
Preferably, described inductance sensor comprises:
Input port;
Coil and resistance, be connected in series between described input port;
Electric capacity, is connected between described input port.
Preferably, described metal-toothed channel parts is a part for the transmission system of air guide structure described in described driving stepper motor.
Second aspect, provides a kind of household electrical appliance, comprises blower fan, air outlet and air ducting;
Wherein, described air ducting is arranged near described air outlet, and described air ducting comprises:
Air guide structure;
Stepper motor, moves for driving described air guide structure;
Metal-toothed channel parts, rotates by described driving stepper motor, and described metal-toothed channel parts has vertically or the radial tooth slot structure extended;
Inductance sensor, be oppositely arranged with described tooth slot structure end, or be oppositely arranged with the side of described tooth slot structure, described side is parallel with the tangent line of the rotation direction of described tooth slot structure;
Inductance detection circuit, is connected with described inductance sensor, and obtain distance signal for the state change detecting described inductance sensor, described distance signal is for characterizing the distance of described inductance sensor to the surface of described metal-toothed channel parts;
Controller, for obtaining the motion state of described stepper motor according to described distance signal, and controls described stepper motor according to described motion state.
Preferably, described controller controls described stepper motor when motion state stepper motor being detected and the drive singal sent are not corresponding and quits work.
Preferably, described controller controls described stepper motor and quits work when the cycle of described distance signal exceeds scheduled time threshold value.
Preferably, the rotating speed of described controller stepper motor according to the computation of Period of described distance signal.
Preferably, described inductance sensor comprises:
Input port;
Coil and resistance, be connected in series between described input port;
Electric capacity, is connected between described input port.
Preferably, described metal-toothed channel parts is a part for the transmission system of air guide structure described in described driving stepper motor.
The embodiment of the present invention utilizes the tooth slot structure of metal-toothed channel parts driven by stepper motors to detect the motion state of stepper motor relative to the distance change of inductance sensor when moving, thus can carry out accurate detection and control to the motion of air guide structure.
Accompanying drawing explanation
By referring to the description of accompanying drawing to the embodiment of the present invention, above-mentioned and other objects, features and advantages of the present invention will be more clear, in the accompanying drawings:
Fig. 1 a is the schematic diagram of the air ducting of the embodiment of the present invention;
Fig. 1 b is the schematic diagram of the metal-toothed channel parts of the air ducting of the embodiment of the present invention and the set-up mode of inductance sensor;
Fig. 2 is the circuit diagram of the inductance sensor of the embodiment of the present invention;
Fig. 3 is the signal output waveform figure of the inductance detection circuit of the air ducting of the embodiment of the present invention;
Fig. 4 is the signal output waveform figure of inductance detection circuit when air ducting is abnormal of the air ducting of the embodiment of the present invention;
Fig. 5 is the schematic diagram of the metal-toothed channel parts of the air ducting of the embodiment of the present invention and the another kind of set-up mode of inductance sensor;
Fig. 6 is the schematic diagram of the metal-toothed channel parts of the air ducting of the embodiment of the present invention and another set-up mode of inductance sensor;
Fig. 7 is the schematic diagram of the metal-toothed channel parts of the air ducting of the embodiment of the present invention and another set-up mode of inductance sensor;
Fig. 8 is the schematic diagram of the household electrical appliance of the embodiment of the present invention.
Detailed description of the invention
Based on embodiment, present invention is described below, but the present invention is not restricted to these embodiments.In hereafter details of the present invention being described, detailedly describe some specific detail sections.Do not have the description of these detail sections can understand the present invention completely for a person skilled in the art yet.In order to avoid obscuring essence of the present invention, known method, process, flow process, element and circuit do not describe in detail.
In addition, it should be understood by one skilled in the art that the accompanying drawing provided at this is all for illustrative purposes, and accompanying drawing is not necessarily drawn in proportion.
Meanwhile, should be appreciated that in the following description, " circuit " refers to the galvanic circle connected and composed by electrical connection or electromagnetism by least one element or electronic circuit.When " being connected to " another element when claiming element or circuit or claiming element/circuit " to be connected to " between two nodes, it can be directly couple or be connected to another element or can there is intermediary element, the connection between element can be physically, in logic or its combine.On the contrary, " be directly coupled to " when claiming element or " being directly connected to " another element time, mean that both do not exist intermediary element.
Unless the context clearly requires otherwise, similar words such as " comprising ", " comprising " otherwise in whole description and claims should be interpreted as the implication that comprises instead of exclusive or exhaustive implication; That is, be the implication of " including but not limited to ".
In describing the invention, it is to be appreciated that term " first ", " second " etc. are only for describing object, and instruction or hint relative importance can not be interpreted as.In addition, in describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
The air ducting of the embodiment of the present invention is applicable to the various household electrical appliance with air blowing function, such as air-conditioning, air cooler, air purifier etc.The air ducting that this kind of household electrical appliance comprise blower fan, air outlet and are arranged near air outlet.
Fig. 1 a is the schematic diagram of the air ducting of the embodiment of the present invention.Fig. 1 b is the metal-toothed channel parts of the air ducting of the embodiment of the present invention and the set-up mode schematic diagram of inductance sensor.
As seen in figure la and lb, air ducting comprises air guide structure 11, stepper motor 12, metal-toothed channel parts 13, inductance sensor 14, inductance detection circuit 15 and controller 16.
Wherein, air guide structure 11 is arranged near air outlet, and the motion along with air guide structure 11 can change the wind direction at air outlet place.
Air guide structure 11 can be that connected by connecting rod can up and down or the multiple guide vane of left-right rotation.Air guide structure 11 also can adopt other structure to realize.
Stepper motor 12 moves for driving air guide structure 11, thus carries out the adjustment of wind direction.
Metal-toothed channel parts 13 is made up of conductive metal material, and rotate by stepper motor 12 drives, in FIG, metal-toothed channel parts 13 is formed as ring-type, has the tooth slot structure 13a extended vertically.Metal-toothed channel parts 13 can be the parts arranged specially for carrying out motion state detection.Such as, the transmission system drives air guide structure 11 that stepper motor 12 is consisted of the first drive disk assembly, the second drive disk assembly and the 3rd drive disk assembly, meanwhile, stepper motor 12 is also by other drive disk assembly or directly drive metal-toothed channel parts 13 to move.Metal-toothed channel parts 13 also can be the part that stepper motor 12 drives in the transmission system of air guide structure 11.Such as, the transmission system drives air guide structure 11 that stepper motor 12 is consisted of the first drive disk assembly, the second drive disk assembly and teeth groove parts 13 moves.This can reduce the number of components of air ducting, saves cost and the volume shared by minimizing, and provides more design alternative.
In Figure 1b, inductance sensor 14 is oppositely arranged with the end of described tooth slot structure 13a.
Fig. 2 is the circuit diagram of the inductance sensor of the embodiment of the present invention.Described inductance sensor 14 comprises coil L, resistance R and electric capacity C.Wherein, coil L and resistance R is connected between two outputs of inductance sensor, and meanwhile, electric capacity C is connected in parallel between two outputs of inductance sensor.The introducing of electric capacity C can form an oscillating circuit with coil, thus reduces the energy consumption of inductance sensor.
Alternating current is by producing alternating magnetic field during coil.If a metal material, enters the magnetic field near coil, this will cause circulating current (eddy current) to appear at the surface of conductive material.The operating distance of these eddy current, the composition of size and metal material and its position in magnetic field relevant.These eddy current can produce oneself magnetic field, and it is contrary with original field coil.The system that metal material and coil form can be equivalent to thus and define a transformer, its coil is former limit, and eddy current is secondary simultaneously.Inductive between the two depends on Distance geometry shape.Therefore, the inductance (eddy current) of resistance and secondary, can change along with the distance of conductive material distance coil.Thus, the distance of metal material and coil can be obtained by the change detecting inductance in the case, distance can be carried out based on this principle and detect.
When metal-toothed channel parts 13 is rotated, move relative to inductance sensor 14 in the end of tooth slot structure 13a.When the teeth portion of tooth slot structure 13a is relative with inductance sensor 14, inductance sensor 14 is the first less distance to the distance of metal covering, and when the groove portion of tooth slot structure 13a is relative with inductance sensor 14, inductance sensor 14 is larger second distance to the distance of metal covering.Inductance sensor 14 constantly changes to the distance of the metal end face of tooth slot structure with tooth slot structure 13a motion.The change of this distance causes the change of the eddy current inductance of the coil L of inductance sensor 14.
Inductance detection circuit 15 is connected with inductance sensor 14, obtains distance signal for the state change detecting described inductance sensor.Described distance signal for characterize described inductance sensor to described metal-toothed channel parts 13 corresponding thereto part distance.Inductance detection circuit 15 can adopt various inductance-digital circuit to realize, the LDC1000 integrated circuit that such as TI company produces.
Particularly, inductance detection circuit 15 can the high-frequency alternating current of, changeable frequency (5k-5MHz) constant to inductance sensor 14 output amplitude, by changing the frequency of alternating current, the resonant frequency (impedance is minimum under this frequency, and electric current is maximum) making inductance sensor 14 that resonance occur can be obtained.Can calculate based on resonant frequency and obtain the inductance value of inductance sensor 14, and then according to table look-up or empirical equation obtains distance signal corresponding to this inductance value.
Thus, along with the rotation of metal-toothed channel parts 13, inductance detection circuit 15 detects that the distance that inductance sensor 14 outputs signal the end face of the tooth slot structure 13a with itself and metal-toothed channel parts changes thus exports the burst be made up of low and high level, as shown in Figure 3.
Controller 16 for calculating the motion state obtaining stepper motor 12 according to distance signal, and controls described stepper motor 12 according to described motion state.
Because metal-toothed channel parts 13 is by stepper motor 12 actuation movement, meanwhile, air guide structure 11 is also by stepper motor 12 actuation movement.Therefore, the movement velocity of metal-toothed channel parts 13 and the rotating speed of stepper motor 12 proportional, meanwhile, it can embody the motion state of stepper motor 12 and air guide structure 11.Described motion state can comprise the information such as the rotating speed of stepper motor 12, and whether stepper motor 12 information such as rotates.
Therefore, controller 16 can obtain the rotating speed of metal-toothed channel parts 13 according to the computation of Period of distance signal, and and then according to the tooth of metal-toothed channel parts and stepper motor 12 than calculating the rotating speed obtaining stepper motor.
The present embodiment utilizes the tooth slot structure of metal-toothed channel parts driven by stepper motors to detect the motion state of stepper motor relative to the distance change of inductance sensor when moving, thus can carry out accurate detection and control to the motion of air guide structure.
Further, controller 16 can control described stepper motor 12 when motion state stepper motor 12 being detected and the drive singal sent are not corresponding and quits work.
Such as, when foreign matter stops air guide structure 11 to move, air guide structure 11, stepper motor 12 and metal-toothed channel parts 13 all stop operating, and now, as shown in Figure 4, it is continuously high level at time period t 1-t2 to the distance signal that inductance detection circuit 15 exports.Controller 16 can stop operating according to this signal acquisition stepper motor 12, output to that the drive singal of stepper motor 12 is not corresponding (is also if this motion state and controller 16 be current, this Time Controller 16 in fact control step motor is kept in motion) controller 16 can judge that current air guide structure breaks down, there is foreign matter, now, can quit work by control step motor 12, prevent from damaging air ducting.
Particularly, in a preferred embodiment, metal-toothed channel parts 13 is the drive disk assembly be directly connected with air guide structure.Metal-toothed channel parts 13, in the cambered surface of 180 degree, can make 90 teeth portion.According to the due rotating speed of stepper motor, sweep wind apparatus when running, the distance signal cycle (or frequency) can calculate according to such as under type:
When normally running, stepper motor pulse rotating speed can be 100 pulse/sec.
The step angle of stepper motor 12 is 7.5 degree/60 pulses, and teeth groove parts 13 are 1:7.5 with the rotating ratio of stepper motor 12.Thus, the step angle being converted to teeth groove parts is: 1 degree/60 pulses.And then, teeth groove component speed=(1 degree/60 pulse)/(100 pulse/sec)=1 degree/0.6 second.
Teeth groove parts 13 have 90 teeth portion on 180 degree, then the angle of each teeth portion is 180/90=2 degree/tooth; Namely travelling mechanism rotates 2 degree of generations pulse (high level and a low level); The cycle of each pulse is 2 degree × 0.6s=1.2 second.
According to as above calculating, when normally running, the distance signal that inductance detection circuit 15 exports there will be a low and high level for every 1.2 seconds and switches.Also namely, the cycle of distance signal is 1.2 seconds.
Also namely, the cycle of distance signal and the rotating speed of stepper motor have corresponding relation, easily obtain corresponding stepper motor rotating speed according to the cycle of distance signal.
Thus, at the invariablenes turning speed of motor under 100 pulse/sec prerequisites, if controller 16 detects that the cycle of the output signal (also namely, distance signal) of inductance detection circuit is about 1.2 seconds, then illustrate that air ducting normally runs.Otherwise, as shown in Figure 4, if the cycle of distance signal exceeds 1.2 seconds morely (consider that fit on exists certain space, when motor can be caused to rotate, travelling mechanism may also not rotate), higher than a predetermined threshold (such as higher than 2 seconds), as then illustrated, stepper motor fails normally to run, and transmission system or air guide structure are paused by foreign matter, occur stall.
Now, controller 16 can quit work by control step motor 12, thus prevents from damaging stepper motor.
Thus, the existence of foreign matter accurately can be detected, in time air ducting be protected.
Meanwhile, adopt inductance sensor to detect not by the impact of the environment parameters such as humidity, dust, light the metal-toothed channel parts of rotating, there is stronger stability, detect accurately.
Simultaneously, because the embodiment of the present invention changes based on the distance between metal-toothed channel parts and inductance sensor the detection carrying out motion state, this makes to have larger flexibility in the selection of metal-toothed channel parts with arranging of both relative positions, can provide multiple design alternative.
Fig. 5 is the schematic diagram of the metal-toothed channel parts of the air ducting of the embodiment of the present invention and the another kind of set-up mode of inductance sensor.
As shown in Figure 5, identical with Fig. 1 of metal-toothed channel parts 13, has the tooth slot structure 13a extended vertically.Unlike, inductance sensor 14 is oppositely arranged with the side of described tooth slot structure 13a, and described side is parallel or substantially parallel with the tangent line of the rotation direction of described tooth slot structure.Due to the side at tooth slot structure 13a, be metal in teeth portion, it is then hollow out in groove portion, therefore, when tooth slot structure 13a moves relative to inductance sensor 14, inductance sensor 14 also can have different states due to the switching of metal teeth portion and openwork part, thus the sequence making inductance detection circuit 15 export height to switch, realize the detection for motion state.
Thus, inductance sensor 14 can be arranged at the side of metal-toothed channel parts, adapt to different design needs.
Fig. 6 is the schematic diagram of the metal-toothed channel parts of the air ducting of the embodiment of the present invention and another set-up mode of inductance sensor.
As shown in Figure 6, metal-toothed channel parts 13 ' has the tooth slot structure 13a ' radially extended.Inductance sensor 14 is oppositely arranged with the end face of tooth slot structure 13a '.Thus, when metal-toothed channel parts 13 ' is rotated, inductance sensor 14 constantly changes to the distance of the metal end face of tooth slot structure with tooth slot structure 13a motion.This change makes the state of inductance sensor switch back and forth, thus makes inductance detection circuit 15 export the sequence of height switching, realizes the detection for motion state.
Thus, metal-toothed channel parts 13 ' can have different tooth slot structures, thus can adapt to different design needs.
Fig. 7 is the schematic diagram of the metal-toothed channel parts of the air ducting of the embodiment of the present invention and another set-up mode of inductance sensor.
As shown in Figure 7, metal-toothed channel parts 13 ' has the tooth slot structure 13a ' radially extended.Inductance sensor 14 is oppositely arranged with the side of described tooth slot structure 13a ', and described side is parallel or substantially parallel with the tangent line of the rotation direction of described tooth slot structure.Due to the side at tooth slot structure 13a ', be metal in teeth portion, it is then hollow out in groove portion, therefore, when tooth slot structure 13a ' moves relative to inductance sensor 14, inductance sensor 14 also can have different states due to the switching of metal teeth portion and openwork part, thus the sequence making inductance detection circuit 15 export height to switch, realize the detection for motion state.
Thus, inductance sensor 14 can be arranged at the side of metal-toothed channel parts, adapt to different design needs.
Fig. 8 is the schematic diagram of the household electrical appliance of the embodiment of the present invention.
As shown in Figure 8, described household electrical appliance can be any household electrical appliance with air blowing function, such as, and air-conditioning, air cooler, air purifier etc.Described household electrical appliance comprise air ducting 1, blower fan 2 and air outlet 3 described in above-mentioned any embodiment.It is inner that blower fan 2 is arranged on described household electrical appliance.Air ducting 1 is arranged near described air outlet 3, and the air guide structure of air ducting 1 is arranged on the wind direction that air outlet sentences air outlet is sent and regulates.
The household electrical appliance of the embodiment of the present invention can utilize the tooth slot structure of metal-toothed channel parts driven by stepper motors to detect the motion state of stepper motor relative to the distance change of inductance sensor when moving, thus can carry out accurate detection and control to air supply direction.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, to those skilled in the art, the present invention can have various change and change.All do within spirit of the present invention and principle any amendment, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. an air ducting, comprising:
Air guide structure;
Stepper motor, moves for driving described air guide structure;
Metal-toothed channel parts, rotates by described driving stepper motor, and described metal-toothed channel parts has vertically or the radial tooth slot structure extended;
Inductance sensor, be oppositely arranged with described tooth slot structure end, or be oppositely arranged with the side of described tooth slot structure, described side is parallel with the tangent line of the rotation direction of described tooth slot structure;
Inductance detection circuit, is connected with described inductance sensor, and obtain distance signal for the state change detecting described inductance sensor, described distance signal is for characterizing the distance of described inductance sensor to the surface of described metal-toothed channel parts;
Controller, for obtaining the motion state of described stepper motor according to described distance signal, and controls described stepper motor according to described motion state.
2. air ducting according to claim 1, is characterized in that, described controller controls described stepper motor when motion state stepper motor being detected and the drive singal sent are not corresponding and quits work.
3. air ducting according to claim 1, is characterized in that, described controller controls described stepper motor and quits work when the cycle of described distance signal exceeds scheduled time threshold value.
4. air ducting according to claim 1, is characterized in that, the rotating speed of described controller stepper motor according to the computation of Period of described distance signal.
5. the air ducting according to any one of claim 1-4, is characterized in that, described inductance sensor comprises:
Input port;
Coil and resistance, be connected in series between described input port;
Electric capacity, is connected between described input port.
6. the air ducting according to any one of claim 1-4, is characterized in that, described metal-toothed channel parts is a part for the transmission system of air guide structure described in described driving stepper motor.
7. household electrical appliance, comprise blower fan, air outlet and air ducting;
Wherein, described air ducting is arranged near described air outlet, and described air ducting comprises:
Air guide structure;
Stepper motor, moves for driving described air guide structure;
Metal-toothed channel parts, rotates by described driving stepper motor, and described metal-toothed channel parts has vertically or the radial tooth slot structure extended;
Inductance sensor, be oppositely arranged with described tooth slot structure end, or be oppositely arranged with the side of described tooth slot structure, described side is parallel with the tangent line of the rotation direction of described tooth slot structure;
Inductance detection circuit, is connected with described inductance sensor, and obtain distance signal for the state change detecting described inductance sensor, described distance signal is for characterizing the distance of described inductance sensor to the surface of described metal-toothed channel parts;
Controller, for obtaining the motion state of described stepper motor according to described distance signal, and controls described stepper motor according to described motion state.
8. household electrical appliance according to claim 7, is characterized in that, described controller controls described stepper motor when motion state stepper motor being detected and the drive singal sent are not corresponding and quits work.
9. household electrical appliance according to claim 7, is characterized in that, described controller controls described stepper motor and quits work when the cycle of described distance signal exceeds scheduled time threshold value.
10. household electrical appliance according to claim 7, is characterized in that, the rotating speed of described controller stepper motor according to the computation of Period of described distance signal.
11. household electrical appliance according to any one of claim 7-10, it is characterized in that, described inductance sensor comprises:
Input port;
Coil and resistance, be connected in series between described input port;
Electric capacity, is connected between described input port.
12. household electrical appliance according to any one of claim 7-10, it is characterized in that, described metal-toothed channel parts is a part for the transmission system of air guide structure described in described driving stepper motor.
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| CN201510579513.7A CN105222268B (en) | 2015-09-11 | 2015-09-11 | Air ducting and apply its household electrical appliance |
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| CN201510579513.7A CN105222268B (en) | 2015-09-11 | 2015-09-11 | Air ducting and apply its household electrical appliance |
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| CN105222268A true CN105222268A (en) | 2016-01-06 |
| CN105222268B CN105222268B (en) | 2018-09-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426747A (en) * | 2019-08-12 | 2019-11-08 | 珠海格力电器股份有限公司 | Detection method, detection device, air purifier, control method and storage medium |
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| JPH11112733A (en) * | 1997-09-29 | 1999-04-23 | Nec Corp | Light quantity adjusting mechanism of image reading device and its method |
| JP2007053857A (en) * | 2005-08-18 | 2007-03-01 | Ichikoh Ind Ltd | Actuator for vehicle lighting fixture |
| CN102455040A (en) * | 2010-10-26 | 2012-05-16 | 珠海格力电器股份有限公司 | Air conditioner |
| CN102997389A (en) * | 2011-09-15 | 2013-03-27 | 珠海格力电器股份有限公司 | Air-sweeping equipment, control method and device thereof, and air conditioner |
| CN203349454U (en) * | 2013-06-09 | 2013-12-18 | 广东美的制冷设备有限公司 | Angle feedback device, air conditioner rotating mechanism and air conditioner |
| CN104697141A (en) * | 2015-03-12 | 2015-06-10 | 广东美的制冷设备有限公司 | Air guide device and air conditioner indoor unit with same |
| CN204555232U (en) * | 2015-03-12 | 2015-08-12 | 广东美的制冷设备有限公司 | Air ducting and there is its air conditioner room unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110426747A (en) * | 2019-08-12 | 2019-11-08 | 珠海格力电器股份有限公司 | Detection method, detection device, air purifier, control method and storage medium |
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