CN107045146B - Air conditioner and detection control device for moving part in air conditioner - Google Patents

Air conditioner and detection control device for moving part in air conditioner Download PDF

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Publication number
CN107045146B
CN107045146B CN201710405381.5A CN201710405381A CN107045146B CN 107045146 B CN107045146 B CN 107045146B CN 201710405381 A CN201710405381 A CN 201710405381A CN 107045146 B CN107045146 B CN 107045146B
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hall
magnetic
magnetic ring
detection
magnetic poles
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CN107045146A (en
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袁光
李洪涛
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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Priority to CN201710405381.5A priority Critical patent/CN107045146B/en
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Priority to PCT/CN2017/118012 priority patent/WO2018126909A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/40—Damper positions, e.g. open or closed

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The invention discloses an air conditioner and a detection control device of a moving part in the air conditioner, the device comprises: the magnetic ring is fixed on a driving part of the driving motion part, and a plurality of N magnetic poles and/or S magnetic poles are distributed on the detection surface of the magnetic ring at intervals; the magnetic ring comprises x Hall detection assemblies, a circuit board and a driving part, wherein the x Hall detection assemblies are arranged close to a detection surface of the magnetic ring, are staggered by a preset angle relative to the magnetic ring, are arranged on the circuit board, and are arranged at staggered linear distances on the circuit board according to the preset angle, the x Hall detection assemblies induce the magnetic pole change of the magnetic ring to correspondingly generate x paths of induction signals when the driving part drives the moving part to move, and x is an integer greater than 1; the control unit who links to each other with x hall detecting element, whether control unit judges the moving part according to x way induction signal and blocks to can effectively judge whether the moving part blocks, and can shorten check-out time through magnetic ring and a plurality of hall cooperation, promote detectivity.

Description

Air conditioner and detection control device for moving part in air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a detection control device for a moving part in an air conditioner and the air conditioner.
Background
The more and more the related air conditioners adopt a sliding switch door or other rotary motion devices, for example, the door panel is opened towards two sides or one side after the air conditioner is started, or a rotary component rotates to the position that the grille is aligned with the air outlet, and the door panel is closed or the rotary component rotates to the position that the baffle plate is aligned with the air outlet after the air conditioner is closed, so that the aesthetic degree of the product is greatly improved.
However, the power mechanism of the door panel is usually an open-loop control stepping motor, and the moment is large. If there is the foreign matter to block or close the in-process at the door plant and the in-process finger stretches in wherein carelessly, the control unit can not know and stall the motor, power unit is in interference state this moment to not only can cause the harm to the structure of product and electrical apparatus, if the finger presss from both sides wherein still can produce very big pain, seriously reduce the use of product and feel.
The door panel is monitored whether to be clamped or not by additionally arranging a grating strip on the door panel and additionally arranging a light-emitting tube and a light-receiving tube on two sides of the grating strip respectively, but the structure is complex and needs long detection time, and the door panel is detected whether to be clamped or not by utilizing the principle that an inductance value changes to cause impedance change of a parallel circuit after an inductor and a capacitor parallel resonant circuit clamps an obstacle, but the service life is limited and the detection function is likely to fail along with the increase of the operation time.
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, an object of the present invention is to provide a detection control device for moving parts in an air conditioner, which can solve the problem that the jamming cannot be detected accurately in time.
Another object of the present invention is to provide an air conditioner.
In order to achieve the above object, an aspect of the present invention provides a detection control apparatus for a moving part in an air conditioner, including: the magnetic ring is fixed on a driving part for driving the moving part, and a plurality of N magnetic poles and/or a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring at intervals; the detection device comprises x Hall detection assemblies matched with the magnetism of a magnetic pole on a detection surface of a magnetic ring, wherein the x Hall detection assemblies are fixedly arranged close to the detection surface of the magnetic ring, the x Hall detection assemblies are staggered relative to the magnetic ring by a preset angle, the x Hall detection assemblies are arranged on a circuit board of the air conditioner, the staggered linear distance of the x Hall detection assemblies on the circuit board is set according to the preset angle, the x Hall detection assemblies sense the magnetic pole change of the magnetic ring to correspondingly generate x-path sensing signals when the driving part drives the moving part to move, and x is an integer greater than 1; and the control unit is connected with the x Hall detection assemblies and judges whether the moving part is blocked or not according to the x paths of induction signals.
According to the detection control device for the moving part in the air conditioner, the magnetic pole change of the magnetic ring is induced by the x Hall detection assemblies when the driving part drives the moving part to move so as to correspondingly generate x-path induction signals, and then the control unit judges whether the moving part is blocked according to the x-path induction signals, so that whether the moving part is blocked can be effectively judged, corresponding measures can be taken to adjust the rotation of the motor in time, the damage to a mechanism is avoided, the detection time can be shortened through the magnetic ring and the plurality of Hall detection assemblies, and the detection sensitivity is improved. And the linear distance of staggering of x hall detection components on the circuit board is set through the preset angle, the hall detection components can be installed with high precision and small errors, and the device is small in occupied space, low in cost, convenient to install, long in service life, stable and reliable.
According to one embodiment of the invention, the Hall detection assembly is a patch type Hall detection element.
According to one embodiment of the invention, the detection surface of the magnetic ring is a peripheral side surface of the magnetic ring.
According to one embodiment of the invention, when x is an even number, the x hall detection assemblies are symmetrically arranged on two sides of a vertical line between the circuit board and the center of the magnetic ring; when x is an odd number, the (x +1)/2 th Hall detection assemblies are arranged opposite to a vertical line between the circuit board and the circle center of the magnetic ring, and the other (x-1) Hall detection assemblies are symmetrically arranged on two sides of the vertical line between the circuit board and the circle center of the magnetic ring.
According to an embodiment of the present invention, when x is an even number, a linear distance between the ith hall sensing element and the (i +1) th hall sensing element on the circuit board is obtained according to the following formula:
when i is less than x/2, L ═ R × tan ((x/2-i) × d + d/2) -R × tan ((x/2-i-1) × d + d/2);
when i is equal to x/2, L ═ 2R × tan (d/2);
when i is greater than x/2, L ═ R × tan ((i-x/2) × d + d/2) -R × tan ((i-x/2-1) × d + d/2);
wherein i is 1, 2, …, (x-1), L is a linear distance between the ith hall detection assembly and the (i +1) th hall detection assembly on the circuit board, R is a vertical distance between the circuit board and the center of the magnetic ring, and d is the preset angle.
According to one embodiment of the invention, when x is an odd number, the linear distance between the ith hall detection assembly and the (i +1) th hall detection assembly on the circuit board is obtained according to the following formula:
when i is less than (x +1)/2, L ═ R × tan (((x +1)/2-i) × d) -R × tan (((x +1)/2-i-1) × d);
when i is equal to or greater than (x +1)/2, L ═ R × tan ((i- (x +1)/2+1) × d) -R × tan ((i- (x +1)/2) × d);
wherein i is 1, 2, …, (x-1), L is a linear distance between the ith hall detection assembly and the (i +1) th hall detection assembly on the circuit board, R is a vertical distance between the circuit board and the center of the magnetic ring, and d is the preset angle.
According to one embodiment of the invention, when a plurality of N magnetic poles and a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring at intervals, the N magnetic poles and the S magnetic poles are arranged at intervals one by one; when a plurality of N magnetic poles are distributed on the detection surface of the magnetic ring, a first blank area is arranged between the adjacent N magnetic poles; when a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring, a second blank area is arranged between the adjacent S magnetic poles. .
According to an embodiment of the present invention, the preset angle includes a first preset angle, a second preset angle and a third preset angle, any two adjacent hall detection assemblies of the x hall detection assemblies are staggered by the third preset angle according to a sum of numbers of the N magnetic pole and the S magnetic pole, or any two adjacent hall detection assemblies of the x hall detection assemblies are staggered by the first preset angle according to a sum of numbers of the N magnetic pole and the first blank area, or any two adjacent hall detection assemblies of the x hall detection assemblies are staggered by the second preset angle according to a sum of numbers of the S magnetic pole and the second blank area.
According to an embodiment of the invention, the first, second and third preset angles are determined according to the following formulas:
d＝360°/s/x+n*2*360°/s
wherein d is the first preset angle, the second preset angle and the third preset angle, x is the number of the hall detection components, N is an integer, S is the sum of the number of the N magnetic poles and the number of the S magnetic poles when a plurality of N magnetic poles and a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring at intervals, is the sum of the number of the N magnetic poles and the number of the first blank area when a plurality of N magnetic poles are distributed on the detection surface of the magnetic ring at intervals, and is the sum of the number of the S magnetic poles and the number of the second blank area when a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring at intervals.
According to one embodiment of the invention, when a plurality of N magnetic poles and a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring, the width of each N magnetic pole is the same, and the width of each S magnetic pole is the same; or when a plurality of N magnetic poles are distributed on the detection surface of the magnetic ring at intervals, the width of each N magnetic pole is the same; or when a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring at intervals, the width of each S magnetic pole is the same.
According to one embodiment of the invention, the driving part comprises a driving motor, and the magnetic ring is fixed on a rotating component of the driving motor.
According to one embodiment of the invention, the rotating component of the drive motor is a transmission gear or a drive shaft.
According to one embodiment of the invention, the magnetic ring is provided with a fixing hole, and the magnetic ring is riveted with the driving part through the fixing hole.
According to one embodiment of the invention, when a plurality of N magnetic poles and a plurality of S magnetic poles are distributed on each layer of magnetic ring, the corresponding Hall detection assembly generates a first level when facing the N magnetic poles and generates a second level when facing the S magnetic poles; when the plurality of N magnetic poles are distributed on each layer of magnetic ring at intervals, the corresponding Hall detection assembly generates a first level when facing the N magnetic poles, and generates a second level when facing the first blank area; when the plurality of S magnetic poles are distributed on each layer of magnetic ring at intervals, the corresponding Hall detection assembly generates a first level when facing the S magnetic poles, and generates a second level when facing the second blank area.
According to an embodiment of the present invention, the x-path sensing signal constructs y level state combinations, y > x, and the control unit includes: a timer for starting timing when a combination of level states changes to time the duration of each of the y detection states; and the control chip is connected with the timer, and judges that the moving part is blocked when the duration of any combination of the level states is greater than a preset time threshold.
According to an embodiment of the present invention, the number y of the level state combinations is x times the number of level states of each of the sensing signals.
In order to achieve the above object, according to another embodiment of the present invention, an air conditioner is provided, which includes the above detection control device for moving parts in the air conditioner.
According to the air conditioner provided by the embodiment of the invention, through the detection control device of the moving part, whether the moving part is blocked or not can be effectively judged, the Hall detection assembly can be installed with high precision and small error, and the air conditioner is high in detection sensitivity, small in occupied space, low in cost, convenient to install, long in service life, stable and reliable.
Drawings
Fig. 1 is a block diagram schematically illustrating a detection control apparatus for a moving part in an air conditioner according to an embodiment of the present invention;
FIG. 2 is a top view of a magnetic ring according to one embodiment of the present invention;
FIG. 3 is a side view of FIG. 2 with the magnetic ring spaces filled with N and S poles in accordance with one embodiment of the present invention;
FIG. 4 is a side view of FIG. 2 with magnetic ring spaces filled with N poles and blank areas in accordance with another embodiment of the present invention;
FIG. 5 is a side view of FIG. 2 with the magnetic ring spaces filled with S poles and blank areas in accordance with yet another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a detection control device for moving parts in an air conditioner according to an embodiment of the present invention, wherein there are two hall detection assemblies;
fig. 7 is a schematic structural diagram of a detection control device for moving parts in an air conditioner according to an embodiment of the present invention, wherein there are three hall sensing assemblies;
fig. 8 is a schematic structural diagram of a detection control device for moving parts in an air conditioner according to an embodiment of the present invention, in which four hall sensing assemblies are provided;
FIG. 9 is a side view in the direction A of FIGS. 6, 7 and 8 according to one embodiment of the present invention;
FIG. 10 is a side view in the direction A of FIGS. 6, 7 and 8 according to another embodiment of the present invention;
FIG. 11 is a side view in the direction A of FIGS. 6, 7 and 8 according to yet another embodiment of the present invention;
fig. 12 is a block diagram schematically illustrating a detection control apparatus for a moving part in an air conditioner according to an embodiment of the present invention;
FIG. 13 is a waveform diagram of the sensing signal output by the Hall sensing assembly according to one embodiment of the present invention, wherein the moving part is not stuck;
FIG. 14 is a waveform diagram of the sensing signal output by the Hall sensing assembly according to one embodiment of the present invention, wherein the moving part is stuck at time t 1;
FIG. 15 is a circuit schematic of a Hall sensing assembly according to one embodiment of the invention;
fig. 16 is a schematic view of a door panel of an air conditioner according to an embodiment of the present invention;
fig. 17 is a schematic view of a mounting position of a motor according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Before describing an air conditioner and a detection control device and method for moving parts in the air conditioner according to an embodiment of the present invention, a door panel sticking detection technique in the related art will be briefly described.
The related art provides a sliding door detection control device, wherein a grating strip is additionally arranged on a door plate, a light emitting tube and a light receiving tube are respectively additionally arranged on two sides of the grating strip, a high-low level pulse feedback signal is generated by the interval light transmission of the grating strip when the door plate normally moves, and whether the door plate is clamped or not can be monitored by detecting the duration time of the high level or the low level.
The related art also proposes a sliding door detection control device, in which whether the door panel is stuck is detected by an impedance detection circuit, using the principle that an inductance value changes to cause a parallel circuit impedance change after an inductor and capacitor parallel resonance circuit clamps an obstacle.
For the detection control device in the first related art, the light emitting tube and the light receiving tube are respectively arranged on two sides of the grating, the structure is complex, the difficulty is high, and a certain gap is needed between the grating and the door panel. In addition, due to the adoption of the photoelectric principle, in order to avoid multiple factors such as ambient light interference, the light transmission and shading gaps of the grating cannot be too narrow, so that the duration time of high and low levels of feedback pulses is prolonged, the detection time of clamping stagnation is prolonged, the detection sensitivity is reduced, and pain can be sustained for a long time if fingers are clamped, so that the user cannot accept the feedback pulses.
For the detection control device in the second related art, the inductor used in the parallel circuit is a metal sheet with copper foil routing, the change of the inductance value is caused by the deformation of the metal sheet caused by an obstacle when the door panel is clamped, but the metal sheet is seriously extruded each time the door panel is closed, although the detection function is closed without the obstacle, the false detection cannot be caused, but the metal sheet is still seriously deformed, and the unrecoverable deformation or complete damage can be caused to the metal sheet after the detection control device is repeatedly closed, so that the service life of the device is limited, and the detection function is likely to fail after the operation time is prolonged. Moreover, the device is only suitable for a single-side door opening and closing device, cannot be used for a double-side door opening and closing device, is only suitable for clamping stagnation in the closing process, and cannot detect clamping stagnation in the opening process.
Based on this, the embodiment of the invention provides an air conditioner and a detection control device for a moving part in the air conditioner.
The following describes a detection control apparatus for a moving part in an air conditioner according to an embodiment of an aspect of the present invention with reference to fig. 1 to 17.
As shown in fig. 1 to 11, the detection control device for a moving part in an air conditioner according to an embodiment of the present invention includes: a magnetic ring 10, x hall detection assemblies 20 and a control unit 30.
The magnetic ring 10 is fixed on a driving part of a driving moving part, and a plurality of N magnetic poles and/or a plurality of S magnetic poles are distributed on a detection surface of the magnetic ring 10 at intervals. According to an embodiment of the present invention, when a plurality of N magnetic poles and a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring 10, the N magnetic poles and the S magnetic poles are arranged at intervals one by one; when a plurality of N magnetic poles are distributed on the detection surface of the magnetic ring 10, a first blank area is arranged between the adjacent N magnetic poles; when a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring 10, a second blank area is provided between adjacent S magnetic poles. That is, when the magnetic ring 10 is filled with the N magnetic poles and the S magnetic poles at intervals, the N magnetic poles and the S magnetic poles are distributed at intervals on the detection surface of the magnetic ring 10, that is, the arrangement rule on the magnetic ring 10 is N magnetic poles-S magnetic poles-N magnetic poles-S magnetic poles, and the magnetic ring 10 is a bipolar magnetic ring; when the magnetic ring 10 is filled with N magnetic poles at intervals, the N magnetic poles and the first blank areas are distributed on the detection surface of the magnetic ring 10 at intervals, that is, the arrangement rule on the magnetic ring 10 is N magnetic poles-first blank areas-N magnetic poles-first blank areas, and then the magnetic ring 10 is a unipolar magnetic ring; when the magnetic ring 10 is filled with the S magnetic poles at intervals, the S magnetic poles and the second blank areas are distributed at intervals on the detection surface of the magnetic ring 10, that is, the arrangement rule on the magnetic ring 10 is S magnetic pole-second blank area-S magnetic pole-second blank area, and at this time, the magnetic ring 10 is a unipolar magnetic ring. The blank area comprises a first blank area or a second blank area without any magnetism, namely a nonmagnetic area.
The x hall detection assemblies 20 are matched with the magnetism of the magnetic poles on the detection surface of the magnetic ring 10, the detection surface of the x hall detection assemblies 20 is fixedly arranged close to the magnetic ring 10, it should be noted that the x hall detection assemblies 20 can be arranged corresponding to the detection surface of the magnetic ring 10, and the x hall detection assemblies 20 can be close to the magnetic ring 10 but are not contacted, and the magnetic field induction range of the magnetic ring 10 is only required.
The x hall detection assemblies 20 are staggered by a preset angle relative to the magnetic ring 10, the x hall detection assemblies 20 are arranged on a circuit board 60 of the air conditioner, and the staggered linear distance of the x hall detection assemblies 20 on the circuit board 60 is set according to the preset angle. That is to say, every two adjacent hall detection assemblies 20 are staggered by a preset angle, and when x hall detection assemblies 20 are arranged on the circuit board 60, the linear distance between every two adjacent hall detection assemblies 20 can be set according to the preset angle, so that every two adjacent hall detection assemblies 20 are staggered by the preset angle relative to the magnetic ring 10.
The x Hall detection assemblies 20 induce the magnetic pole change of the magnetic ring 10 when the driving part drives the moving part to move so as to correspondingly generate x induction signals, wherein x is an integer greater than 1. The control unit 30 is connected with the x hall detection assemblies 20, and the control unit 30 judges whether the moving part is stuck according to the x-path sensing signals.
Specifically, taking the example that a plurality of N magnetic poles and a plurality of S magnetic poles are distributed at intervals on the detection surface of the magnetic ring 10 as an example, when the driving part drives the moving part to move, the magnetic ring 10 moves along with the driving part, and the x hall detection assemblies 20 are fixed, the N magnetic pole and the S magnetic pole on the detection surface of the magnetic ring 10 sequentially pass through each hall detection assembly 20, the x hall detection assemblies 20 sense the change of the magnetic poles of the magnetic ring 10 to output x sensing signals such as high and low level pulse sequences, when the driving part moves according to a preset speed, the x sensing signals output by the x hall detection assemblies 20 will conform to a corresponding rule, and when the driving part stops moving, the magnetic poles sensed by the x hall detection assemblies 20 will remain unchanged, the x sensing signals will not conform to the corresponding rule, so that the control unit 30 determines the state of the moving part according to the x sensing signals, such as whether the moving part is stuck or not, or whether the driving part is locked.
It should be understood that the case that the N magnetic poles and the first blank area are alternately filled on the detection surface of the magnetic ring 10, or the case that the S magnetic poles and the second blank area are alternately filled on the detection surface of the magnetic ring 10 is similar to the case that the N magnetic poles and the S magnetic poles are alternately filled on the detection surface of the magnetic ring 10, and the description thereof is omitted.
According to one embodiment of the invention, the driving part may comprise a driving motor, and the magnetic ring 10 is fixed on a rotating component of the driving motor. That is, when the driving motor drives the moving part to move, the magnetic ring 10 rotates with the rotating component of the driving motor.
According to an embodiment of the present invention, the driving motor may be a stepping motor, the stepping motor may be controlled in an open loop, and the control unit 30 may detect whether the stepping motor is locked or not through the structure of the magnetic ring 10 and the plurality of hall sensing assemblies 20, so as to prevent the stepping motor from being continuously in an interference state, and from adversely affecting the operation of the motor itself and the product.
According to one embodiment of the invention, the rotating component of the drive motor is a transmission gear or a drive shaft. That is, the magnetic ring 10 may be fixed to a driving gear or a driving shaft of a driving motor so that the magnetic ring 10 rotates when the driving motor rotates.
It should be noted that, when the driving motor drives the moving part, if a plurality of transmission gears are disposed between the driving motor and the moving part, the magnetic ring 10 is preferably fixed on the transmission gear near the moving part.
Specifically, as shown in fig. 2, a fixing hole 101 is formed on the magnetic ring 10, for example, a fixing hole 101 is formed in the center of the magnetic ring 10, and the magnetic ring 10 is riveted with a driving component, such as a rotating component of a driving motor, through the fixing hole 101, so as to rotate synchronously with the driving component. That is, the magnetic ring 10 may be riveted with a transmission gear or a driving shaft of a driving motor through the fixing hole 101. In addition, the magnetic ring 10 can also be directly made as one part with the transmission gear, thereby saving materials, space and cost and simplifying installation.
Also, according to an embodiment of the present invention, a Circuit Board 60 (e.g., a PCB) may be fixed on the air conditioner body. That is to say, the hall sensing assemblies 20 are all fixed on the PCB and fixed on the air conditioner body through the PCB, and the hall sensing assemblies 20 are located at one side of the magnetic ring 10, close to the sensing surface of the magnetic ring 10 but not in contact, and within the range of the magnetic field sensing. Therefore, the design enables the whole installation to be more convenient and fast, and the problem of wiring can be avoided.
Further, according to an embodiment of the present invention, as shown in fig. 2 to 5, a plurality of N poles and/or a plurality of S poles are arranged in an equal width manner. That is, when the detecting surface of the magnetic ring 10 is filled with the N magnetic poles and the S magnetic poles at intervals, the width of each N magnetic pole is equal and the width of each S magnetic pole is equal; when the detection surface of the magnetic ring 10 is filled with the N magnetic poles and the first blank area at intervals, the width of each N magnetic pole is equal; when the detection surface of the magnetic ring 10 is filled with the S magnetic pole and the second blank area at intervals, the width of each S magnetic pole is equal.
It should be noted that the width of the N magnetic pole and/or the S magnetic pole is as narrow as possible under the premise of ensuring the magnetic field strength, for example, 1 to 2mm can be achieved, and the magnetic field strength is required to be determined according to the hall sensing parameters of the hall sensing assembly 20.
Specifically, when the N-pole and the first blank region (or the S-pole and the second blank region) are filled at intervals on the detection surface of the magnetic ring 10, a magnetic region angle of the N-pole or the S-pole may be (pi + arcsin (X/a) + arcsin (Y/a))/p according to a formula λ, where λ is the magnetic region angle of the N-pole or the S-pole, a is a maximum magnetic density of the N-pole or the S-pole, X is an operating point of the hall detection assembly, Y is a release point of the hall detection assembly, and p is the number of the N-pole or the S-pole, and accordingly, a region angle θ of the first blank region or the second blank region may be set according to a formula θ 2 pi/p- λ. In other embodiments, the angle of the N-pole magnetic region, which is a magnetic region, may be approximately equal to the angle of the first blank region, or the angle of the S-pole magnetic region, which is a magnetic region, may be approximately equal to the angle of the second blank region.
According to one embodiment of the present invention, the x hall sensing assemblies 20 can be matched with the magnetic poles on the sensing surface of the magnetic ring 10 for corresponding magnetic arrangement. For example, when the detection surface of the magnetic ring 10 is filled with N magnetic poles and S magnetic poles at intervals, the x hall detection assemblies 20 may be bipolar hall elements, and the bipolar hall elements may respectively sense the N magnetic poles and the S magnetic poles to generate different signals when sensing different magnetic poles; for another example, when the detection surface of the magnetic ring 10 is filled with N magnetic poles and first blank regions at intervals or filled with S magnetic poles and second blank regions at intervals, the x hall detection assemblies 20 may be unipolar hall elements, and the unipolar hall elements may sense the matched magnetic poles to generate sensing signals when sensing the matched magnetic poles, that is, the selection type of the unipolar hall elements is matched with the unipolar magnetic ring, if the unipolar magnetic ring 10 is an N-pole type, the unipolar hall is also selected as an N-pole type, and if the unipolar magnetic ring is an S-pole type, the unipolar hall is also selected as an S-pole type.
In addition, the number of the N magnetic poles and/or the S magnetic poles is related to the size of the magnetic ring 10, and the larger the size of the magnetic ring 10 is, the larger the total number of the N magnetic poles or the S magnetic poles is, and the higher the detection sensitivity is.
According to one embodiment of the present invention, as shown in fig. 2-5, the detection surface of the magnetic ring 10 may be a peripheral side surface of the magnetic ring. That is, the magnetic ring 10 may adopt a side magnetizing form, as shown in fig. 3, the N magnetic pole and the S magnetic pole may be spaced to fill the periphery of the magnetic ring 10; as shown in fig. 4, the N magnetic pole and the blank area can be filled at intervals around the magnetic ring 10; as shown in fig. 5, the magnetic ring 10 may be filled with S poles and empty areas at intervals. Wherein, fig. 2 is a front view of the magnetic ring 10. Therefore, a side magnetizing mode is adopted, so that a strong magnetic field intensity can be ensured, and the Hall detection assembly can sense the magnetic field without being close to the magnetic ring 10.
According to an embodiment of the present invention, as shown in fig. 6 to 11, the hall sensing component 20 may be a chip type hall sensing element, that is, the hall sensing component 20, such as a hall element, may be in a chip type package form, wherein, as shown in fig. 6 to 11, the chip type hall sensing component 20 may be matched with the side magnetized magnetic ring 10. Therefore, the patch type Hall detection assembly can realize high-precision and small-error accurate positioning, so that detection errors can be reduced, automatic assembly can be facilitated by the patch type Hall detection assembly, and the assembly speed is increased.
According to an embodiment of the present invention, as shown in fig. 6 and 7, when x is an even number, x hall sensing elements 20 are symmetrically arranged on two sides of a vertical line between the circuit board 60 and the center of the magnetic ring 10, that is, when the number of the hall sensing elements 20 is an even number, a midpoint of a connecting line of the two hall sensing elements 20 at the two ends is located from the center of the magnetic ring 10 to a vertical point of the circuit board 60, such as a PCB board.
As shown in fig. 8, when x is an odd number, the (x +1)/2 th hall sensing elements are disposed opposite to a vertical line between the circuit board 60 and the center of the magnetic ring 10, and the remaining (x-1) hall sensing elements are symmetrically arranged at both sides of the vertical line between the circuit board 60 and the center of the magnetic ring 10. That is, when the number of the hall sensing assemblies 20 is odd, the middle hall sensing assembly 20 is located at a point from the center of the magnetic ring 10 to the perpendicular point of the circuit board 60, such as a PCB board.
Fig. 9 is a side view of fig. 6, 7 and 8 in a direction a when the magnetic ring 10 is filled with the N magnetic poles and the S magnetic poles at intervals, fig. 10 is a side view of fig. 6, 7 and 8 in a direction a when the magnetic ring 10 is filled with the N magnetic poles and the blank regions at intervals, and fig. 11 is a side view of fig. 6, 7 and 8 in a direction a when the magnetic ring 10 is filled with the S magnetic poles and the blank regions at intervals. That is, fig. 6, 7, and 8 are side views in the a direction.
According to an embodiment of the present invention, when x is an even number, a linear distance between the ith hall sensing element and the (i +1) th hall sensing element on the circuit board 60 is obtained according to the following formula:
when i is less than x/2, L ═ R × tan ((x/2-i) × d + d/2) -R × tan ((x/2-i-1) × d + d/2);
when i is equal to x/2, L ═ 2R × tan (d/2);
when i is greater than x/2, L ═ R × tan ((i-x/2) × d + d/2) -R × tan ((i-x/2-1) × d + d/2);
wherein i is 1, 2, …, (x-1), L is the linear distance between the ith hall detection assembly and the (i +1) th hall detection assembly on the circuit board 60, R is the vertical distance between the circuit board 60 and the center of the magnetic ring 10, and d is a preset angle.
And when x is an odd number, the linear distance between the ith Hall detection assembly and the (i +1) th Hall detection assembly on the circuit board is obtained according to the following formula:
when i is less than (x +1)/2, L ═ R × tan (((x +1)/2-i) × d) -R × tan (((x +1)/2-i-1) × d);
when i is equal to or greater than (x +1)/2, L ═ R × tan ((i- (x +1)/2+1) × d) -R × tan ((i- (x +1)/2) × d);
wherein i is 1, 2, …, (x-1), L is the linear distance between the ith hall detection assembly and the (i +1) th hall detection assembly on the circuit board 60, R is the vertical distance between the circuit board 60 and the center of the magnetic ring 10, and d is a preset angle.
It should be noted that, the order of arranging the x hall sensing assemblies 20 on the circuit board 60 may be from left to right or from right to left, which is the 1 st hall sensing assembly 20 to the xth hall sensing assembly 20 in turn.
Particularly, the PCB is a straight plate, which cannot be matched with the radian of the magnetic ring 10, so that the preset angle can be converted into the linear distance of the x hall detection assemblies 20 on the PCB according to the staggered preset angle of the x hall detection assemblies 20 and the number of the hall detection assemblies 20.
For example, as shown in fig. 6, there may be two hall sensing elements 20, and a linear distance between the two hall sensing elements 20 and the PCB after conversion is 2R × tan (d/2), where L is a linear distance between the two hall sensing elements 20 and the PCB is offset from the center of the magnetic ring 10, and R is a vertical distance between the PCB and the center of the magnetic ring 10.
For another example, as shown in fig. 7, there may be three hall sensing elements 20, and the linear distance between the three hall sensing elements 20 converted on the PCB is L ═ R × tan (d), that is, the distance between the first hall sensing element 20A from the left and the second hall sensing element 20B from the middle is L ═ R × tan (d), and the distance between the second hall sensing element 20B from the middle and the third hall sensing element 20C from the right is L ═ R × tan (d).
For another example, as shown in fig. 8, four hall sensing elements 20 may be provided, and the linear distance between the four hall sensing elements 20 converted on the PCB is L1-2R × tan (d/2), and L2-R × tan (d × 3/2) -L1/2. Wherein, L1 is the staggered distance of two hall detecting element in the middle of, and L2 is the staggered distance of two hall detecting element in both sides apart from the middle hall detecting element that closes on. That is, the first hall sensor element from the left is shifted from the second hall sensor element to the middle by L2 ═ R × tan (d × 3/2) — R × tan (d/2), the second hall sensor element from the middle is shifted from the third hall sensor element to the middle by L1 ═ 2R × tan (d/2), and the third hall sensor element from the middle is shifted from the fourth hall sensor element to the right by L2 ═ R × tan (d × 3/2) — R × tan (d/2).
Further, according to an embodiment of the present invention, the preset angle includes a first preset angle, a second preset angle and a third preset angle, any two adjacent hall sensing assemblies 20 in the x hall sensing assemblies 20 are staggered by the third preset angle according to the sum of the numbers of the N magnetic pole and the S magnetic pole, or any two adjacent hall sensing assemblies 20 in the x hall sensing assemblies 20 are staggered by the first preset angle according to the sum of the numbers of the N magnetic pole and the first blank area, or any two adjacent hall sensing assemblies 20 in the x hall sensing assemblies 20 are staggered by the second preset angle according to the sum of the numbers of the S magnetic pole and the second blank area. That is, when a plurality of N magnetic poles and a plurality of S magnetic poles are distributed at intervals on the detection surface of the magnetic ring 10, the x hall detection assemblies 20 are staggered by a third preset angle according to the sum of the numbers of the N magnetic poles and the S magnetic poles; when a plurality of N magnetic poles are distributed on the detection surface of the magnetic ring 10 at intervals, the x Hall detection assemblies 20 are staggered by a first preset angle according to the sum of the number of the N magnetic poles and the number of the first blank areas; when a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring 10 at intervals, the x hall detection assemblies 20 are staggered by a second preset angle according to the sum of the number of the S magnetic poles and the second blank area. Specifically, two adjacent hall sensing assemblies 20 may be staggered by a preset angle.
That is to say, the x hall sensing assemblies 20 may be distributed in a staggered manner, taking the example that a plurality of N magnetic poles and a plurality of S magnetic poles are distributed on the sensing surface of the magnetic ring 10 at intervals, the x hall sensing assemblies 20 may match the total number of N magnetic poles and S magnetic poles of the magnetic ring 10 and the width of each magnetic pole is staggered by a preset angle, so that the x sensing signals output by the x hall sensing assemblies 20 are sequentially staggered by a preset phase angle, thereby enhancing the sensing sensitivity by times. As shown in fig. 7, taking three hall detecting elements 20 as an example, a preset angle is staggered between the left hall detecting element 20A and the middle hall detecting element 20B, and a preset angle is also staggered between the middle hall detecting element 20B and the right hall detecting element 20C, and taking clockwise rotation of the magnetic ring 10 as an example, the sensing signal output by the middle hall detecting element 20B lags behind the preset phase angle of the left hall detecting element 20A, and the sensing signal output by the right hall detecting element 20C lags behind the preset phase angle of the middle hall detecting element 20B.
Specifically, the first preset angle, the second preset angle and the third preset angle may be determined according to the following formulas:
d＝360°/s/x+n*2*360°/s
wherein d is a first preset angle, a second preset angle and a third preset angle, x is the number of hall detection components, N is an integer, S is the sum of the number of N magnetic poles and the number of S magnetic poles when a plurality of N magnetic poles and a plurality of S magnetic poles are distributed at intervals on the detection surface of the magnetic ring 10, is the sum of the number of N magnetic poles and the number of first blank areas when a plurality of N magnetic poles are distributed at intervals on the detection surface of the magnetic ring 10, and is the sum of the number of S magnetic poles and the number of second blank areas when a plurality of S magnetic poles are distributed at intervals on the detection surface of the magnetic ring 10.
It should be noted that S is the total number of magnetic poles on the magnetic ring 10, i.e. the sum of the numbers of the N magnetic pole and the S magnetic pole, or the sum of the numbers of the N magnetic pole and the first blank area, or the sum of the numbers of the S magnetic pole and the second blank area. n is any integer, and the specific value is determined as long as the hall sensing elements 20 do not interfere with each other in the arrangement space.
Specifically, taking the total number S of the N magnetic poles and the S magnetic poles of the magnetic ring 10 as 24, the number x of the hall detection assemblies 20 as 3 as an example, N is 1, and d obtained by calculating the preset angle is 35 °, that is, two adjacent hall detection assemblies 20 are staggered by 35 °. More specifically, as shown in fig. 7, the left hall sensing element 20A is staggered by 35 ° from the middle hall sensing element 20B, and the middle hall sensing element 20B is also staggered by 35 ° from the right hall sensing element 20C, accordingly, when the magnetic ring 10 rotates clockwise, the sensing signal output by the middle hall sensing element 20B lags by 60 ° with respect to the sensing signal output by the left hall sensing element 20A, and the sensing signal output by the right hall sensing element 20C lags by 60 ° with respect to the sensing signal output by the middle hall sensing element 20B.
Further, according to an embodiment of the present invention, as shown in fig. 2 to 5, the plurality of N magnetic poles and/or the plurality of S magnetic poles on each layer of the magnetic ring 10 are arranged in an equal width manner. That is, when a plurality of N magnetic poles and a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring 10, the width of each N magnetic pole is the same and the width of each S magnetic pole is the same; or when a plurality of N magnetic poles are distributed on the detection surface of the magnetic ring 10 at intervals, the width of each N magnetic pole is the same; or when a plurality of S magnetic poles are distributed at intervals on the detection surface of the magnetic ring 10, the width of each S magnetic pole is the same.
It should be noted that the width of the N magnetic pole and/or the S magnetic pole is as narrow as possible under the premise of ensuring the magnetic field strength, for example, 1 to 2mm can be achieved, and the magnetic field strength is required to be determined according to the hall sensing parameters of the hall sensing assembly 20.
Specifically, when the magnetic ring 10 is filled with the N-pole and the first blank region (or the S-pole and the second blank region) at intervals, the magnetic region angle of the N-pole or the S-pole may be set according to a formula λ ═ pi + arcsin (X/a) + arcsin (Y/a))/p, where λ is the magnetic region angle of the N-pole or the S-pole, a is the maximum magnetic density of the N-pole or the S-pole, X is an operating point of the hall sensing assembly, Y is a release point of the hall sensing assembly, D is the length of the magnetic ring 10 along the moving direction of the moving part, and p is the number of the N-pole or the S-pole, i.e., the logarithm of the N-pole and the first blank region or the logarithm of the S-pole and the second blank region, and accordingly, the region angle D2 of the blank region may be set according to a formula θ ═ 2 pi/p- λ. In addition, according to a specific example of the present invention, the angle of the magnetic region, i.e., the N-pole magnetic region, and the angle of the first blank region may be approximately equal, or the angle of the magnetic region, i.e., the S-pole magnetic region, and the angle of the second blank region may be approximately equal.
In addition, it should be understood that the number of N and/or S poles is related to the size of the magnetic ring 10, and the larger the size of the magnetic ring 10, the greater the total number of poles, and the higher the detection sensitivity.
According to one embodiment of the present invention, each hall sensing assembly 20 may generate a corresponding sensing signal according to the sensed magnetic pole type.
For example, when the magnetic ring 10 has a plurality of N poles and a plurality of S poles spaced apart from each other, each hall sensing element 20 generates a first level when it faces the N poles and a second level when it faces the S poles. It should be noted that the first level may be a high level and the second level may be a low level, or the first level may be a low level and the second level may be a high level, and the level state may be specifically determined according to the type of the hall sensing assembly 20. Thus, when the N magnetic pole and the S magnetic pole on the magnetic ring alternately pass through each hall sensing assembly 20, each hall sensing assembly 20 will output a stable high-low level pulse sequence, and thus, the periods of the x high-low level pulse sequences output by the x hall sensing assemblies 20 are fixed and the same, and the duty ratio is 50%.
For another example, when the magnetic ring 10 has a plurality of N poles and first blank regions spaced apart from each other, each hall sensing element 20 generates a first level when facing the N poles and a second level when facing the first blank regions. Thus, when the N magnetic pole and the first blank area on the magnetic ring 10 alternately pass through each hall sensing assembly 20, each hall sensing assembly 20 will output a stable high-low level pulse sequence, and thus, the periods of the x high-low level pulse sequences output by the x hall sensing assemblies 20 are fixed and the same, and the duty ratio is 50%.
For another example, when the magnetic ring 10 has a plurality of S magnetic poles and second blank regions spaced apart from each other, each hall sensing element 20 generates a first level when facing the S magnetic pole and a second level when facing the second blank region. Thus, when the magnetic ring 10 passes through each hall sensing assembly 20 alternately with the S magnetic pole and the second blank area, each hall sensing assembly 20 will output a stable high-low level pulse sequence, and thus, the periods of the x high-low level pulse sequences output by the x hall sensing assemblies 20 are fixed and the same, and the duty ratio is 50%.
Therefore, the N magnetic pole and/or the S magnetic pole on the magnetic ring 10 can be very dense (the width of the magnetic pole can be 1-2mm), the sensitivity is high, and the frequency of feedback pulse can be improved, so that the detection time is shortened, and the detection sensitivity is improved. And based on the Hall effect, the method is stable and reliable, has low interference, stable pulse waveform and rapid high and low level jump.
According to one embodiment of the present invention, the x-way sensing signal constructs y level state combinations, y > x. According to an embodiment of the present invention, the number y of the level state combinations is x times the number of the level states of each sensing signal, that is, y is 2 x.
As shown in fig. 12, the control unit 30 includes: a timer 301 and a control chip 302.
Wherein the timer 301 is configured to start timing when any one of the y level state combinations occurs, so as to time the duration of each of the y level state combinations; the control chip 302 is connected with the timer 301, the control chip 302 is further connected with the x hall detection assemblies 20, and the control chip 302 judges that the moving part is jammed when the duration time of any combination of the level states is greater than a preset time threshold value.
That is to say, the total number of the magnetic poles of the x hall detection assemblies 20 matching the magnetic ring 10 and the width of each magnetic pole are staggered by a preset angle, that is, the x paths of sensing signals output by the x hall detection assemblies 20 are sequentially staggered by a preset phase angle, so that different level state combinations can be formed at the same time. The control chip 302 can determine whether the driving motor is locked by detecting whether the duration time of each level state combination exceeds a preset time threshold, and then determine whether the moving part is blocked. Therefore, the detection time can be further shortened in multiples by adopting the staggered distribution of the multiple Hall detection components, and the effect of reducing the detection time in multiples can be achieved.
Specifically, taking the example that a plurality of N magnetic poles and a plurality of S magnetic poles are distributed at intervals on the magnetic ring 10 as an example, when the driving component drives the moving component to move, for example, the driving motor rotates, the rotating component of the driving motor drives the magnetic ring 10 to rotate synchronously, the x hall detecting components 20 are fixed, the N magnetic poles and the S magnetic poles on the magnetic ring 10 alternately pass through the x hall detecting components 20, and the x hall detecting components 20 respectively generate high and low level pulse sequences with duty ratio of 50%.
Two adjacent hall sensing assemblies 20 are staggered by a predetermined angle according to the formula d ═ 360 °/s/x + n × 2 × 360 °/s, and accordingly, two adjacent hall sensing assemblies 20 can obtain waveforms with a phase angle of 180 °/x. Therefore, one period in each waveform can be equally divided into 2x level state combinations, the duration tn of each level state combination is 1/x of the duration of the high level state or the low level state of any signal, namely tn is 1/r/p/2/x, wherein r is the rotating speed of the magnetic ring 10, and p is the number of the N magnetic poles or the S magnetic poles, when the magnetic ring 10 is arranged on the transmission gear, the rotating speed of the magnetic ring 10 can be calculated according to the rotating speed of the driving motor and the gear transmission ratio, and when the driving motor is a stepping motor and the magnetic ring is arranged on the driving shaft, the rotating speed of the magnetic ring 10 can be calculated according to the step angle and the driving pulse period. Therefore, the detection time can be further shortened by times by adopting the staggered distribution of the plurality of Hall detection components, for example, the detection time can be shortened by times by using more or less Hall sensors.
As shown in fig. 13, taking x as 3 and d as 35 ° as an example, three hall sensing elements 20 can output three waveforms each delayed by 60 ° in phase angle, that is, the output waveform of the hall sensing element 20B lags behind the output waveform of the hall sensing element 20A by 60 °, and the output sense signal of the hall sensing element 20C lags behind the output waveform of the hall sensing element 20B by 60 °. Thus, one period in each waveform can be equally divided into six level state combinations, namely, 100, 110, 111, 011, 001 and 000, wherein 1 represents high level and 0 represents low level, and the duration tn of each level state combination is 1/3 of the duration of the high level or low level state of any one signal, and tn is 1/r/p/3, wherein r is the rotation speed of the magnetic ring 10, so that the detection sensitivity is improved by three times.
When the driving motor is locked and stops rotating, that is, the moving component is stuck, the magnetic pole corresponding to each hall sensing assembly 20 does not change any more, so the output level of each hall sensing assembly 20 will be continuously at a high level or continuously at a low level. As shown in fig. 14, the driving motor is locked at time t1 and is recovered at time t2, tn is the duration of each level state combination when no locked rotation occurs, td is a preset time threshold, when locked rotation occurs, the three-way waveform maintains the current level state, and when the duration is greater than td, it is determined that locked rotation occurs in the motor, and it is further determined that the moving component is blocked. The preset time threshold td is k × tn, and the value range of k is 1-4, preferably 1.5.
As described above, the detection process for detecting whether the moving part is stuck according to the embodiment of the present invention is as follows:
when the driving part drives the moving part to move, the control chip 302 starts a detection function and controls the timer 301 to start timing, the control chip 302 can collect sensing signals output by the x hall detection assemblies 20, when high and low level jump occurs to any path of sensing signal, the control timer 301 is cleared, the control chip 302 can judge whether the timing value of the timer 301 is greater than a preset time threshold td, if the timing value of the timer 301 is greater than the preset time threshold td, the driving motor is judged to be locked, so that the moving part is judged to be blocked, and the control chip 302 outputs a locked-rotor protection signal to execute motor protection action, for example, the driving motor is controlled to stop rotating or reversely rotate; if the timing value of the timer 301 is less than or equal to the preset time threshold td, it is determined that the motor is not locked, and further it is determined that the moving component is not jammed, and the control chip 302 can control the driving motor to continue to rotate forward.
It should be understood that the embodiment in which the detection surface of the magnetic ring 10 is alternately filled with the N magnetic poles and the first blank regions, and the detection surface of the magnetic ring 10 is alternately filled with the S magnetic poles and the first blank regions is substantially the same as the previous embodiment in which the detection surface of the magnetic ring 10 is alternately filled with the N magnetic poles and the S magnetic poles, except that when the magnetic ring 10 is alternately filled with the N magnetic poles and the first blank regions, the N magnetic poles and the first blank regions alternately pass through the corresponding hall sensing assemblies 20, and when the magnetic ring 10 is alternately filled with the S magnetic poles and the second blank regions, the S magnetic poles and the second blank regions alternately pass through the corresponding hall sensing assemblies 20, and will not be described in detail herein.
In addition, according to an embodiment of the present invention, as shown in fig. 15, the power supply terminals of the x hall sensing assemblies 20 are all connected to a preset power supply VCC, for example, +5V, through a first resistor R1, the ground terminals of the x hall sensing assemblies 20 are grounded, and a first capacitor C1 is connected between the power supply terminals and the ground terminals of the x hall sensing assemblies 20 in parallel, wherein the sensing terminal of each hall sensing assembly 20 senses a magnetic pole change of the magnetic ring, and the output terminal of each hall sensing assembly 20 outputs a corresponding sensing signal.
Further, as shown in fig. 15, the detection control device for the moving part in the air conditioner further includes x output circuits 40, the x output circuits 40 are connected to the output ends of the x hall sensing assemblies 20 in a one-to-one correspondence, and each output circuit 40 includes: the second resistor R2 and the third resistor R3, the second resistor R2 and the third resistor R3 are connected in series, one end of the second resistor R2 and one end of the third resistor R3 which are connected in series are connected with a preset power VCC, the other end of the second resistor R2 and the other end of the third resistor R3 which are connected in series are connected with the control unit 30, namely the control chip 302, a node is arranged between the second resistor R2 and the third resistor R3 which are connected in series, and the node is connected with the output end of the corresponding Hall detection assembly 20.
The second resistor R2 is a pull-up resistor, and the third resistor R3 is a current-limiting resistor.
That is, each hall sensing element 20 can supply 5V power, so that each hall sensing element 20 can output a high-low level pulse sequence with an amplitude of 5V, each high-low level pulse sequence is provided to the control unit 30 through a corresponding output circuit, the control unit 30 can time the duration of the level state combination of the x high-low level pulse sequences, and determine whether the moving component is jammed by comparing the time with the preset time threshold.
Further, according to an embodiment of the present invention, as shown in fig. 16 and 17, the moving part may be a door panel 300 of an air conditioner, the door panel 300 being a slidable door panel; the driving part 100, for example, a driving motor, may drive the door panel 300. Specifically, the cabinet of the air conditioner is provided with a slidable door panel 300, when the air conditioner is started, the control device of the air conditioner can drive the door panel 300 to be opened through the motor 100, and when the air conditioner is closed, the control device of the air conditioner can drive the door panel 300 to be closed through the motor 100, so that the attractiveness of the product is improved. When the number of the door panel 300 is one, the door panel 300 can be opened to one side; when the door panel 300 is two, the door panel 300 can be opened to both sides.
The detection control device for the moving part in the air conditioner according to the embodiment of the present invention may detect whether the driving part 100 is locked or not, so as to determine whether the door panel 300 is stuck, for example, meets an obstacle. Specifically, when the door panel 300 moves in the door opening direction or the door closing direction, the driving component 100, such as a rotating component of a driving motor, drives the magnetic ring 10 to rotate synchronously, the N magnetic pole and the S magnetic pole on the magnetic ring alternately pass through the x hall detection components, the x hall detection components respectively output stable high and low level pulse sequences, and the duty ratio is 50%.
When the door panel 300 is stuck, for example, a foreign object is stuck on the door panel 300 or a finger is accidentally extended in the door panel, the driving part 100 stops moving, the magnetic pole corresponding to each hall sensor assembly does not change any more, and the output level of each hall sensor assembly is continuously at a high level or continuously at a low level. The control unit 30 may determine whether the driving member 100 is locked by detecting whether the duration of each level state combination exceeds a preset time threshold, and further determine whether the door panel 300 is stuck, for example, meets an obstacle.
From this, whether can effectively detect door plant 300 and meet the barrier to shorten check-out time, can obtain the jamming information of door plant fast, do slight touching can detect the effect of jamming, thereby in time take corresponding tactics to adjust the motion of door plant, avoid causing the damage to the mechanism, improved user and used the experience satisfaction simultaneously. And can shorten check-out time through magnetic ring and many hall detecting element, promote detectivity, prevent to cause the injury for the user for example clip finger etc. promote user's experience.
In summary, according to the detection control device for the moving part in the air conditioner provided by the embodiment of the invention, the x hall detection assemblies induce the magnetic pole change of the magnetic ring when the driving part drives the moving part to move so as to generate the x-path induction signal correspondingly, and then the control unit judges whether the moving part is blocked according to the x-path induction signal, so that whether the moving part is blocked can be effectively judged, corresponding measures can be taken in time to adjust the rotation of the motor, the damage to the mechanism is avoided, the detection time can be shortened through the magnetic ring and the plurality of hall detection assemblies, and the detection sensitivity is improved. And the linear distance of staggering of x hall detection components on the circuit board is set through the preset angle, the hall detection components can be installed with high precision and small errors, and the device is small in occupied space, low in cost, convenient to install, long in service life, stable and reliable.
In another aspect, the present invention provides an air conditioner, which includes the detection control device for the moving parts in the air conditioner.
According to the air conditioner provided by the embodiment of the invention, through the detection control device of the moving part, whether the moving part is blocked or not can be effectively judged, the Hall detection assembly can be installed with high precision and small error, and the air conditioner is high in detection sensitivity, small in occupied space, low in cost, convenient to install, long in service life, stable and reliable.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (14)

1. A detection control apparatus for a moving part in an air conditioner, comprising:
the magnetic ring is fixed on a driving part for driving the moving part, and a plurality of N magnetic poles or a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring at intervals;
the detection device comprises x Hall detection assemblies matched with the magnetism of a magnetic pole on a detection surface of a magnetic ring, wherein the x Hall detection assemblies are fixedly arranged close to the detection surface of the magnetic ring, the x Hall detection assemblies are staggered by a preset angle relative to the magnetic ring, the x Hall detection assemblies are arranged on a circuit board of the air conditioner, the staggered linear distance of the x Hall detection assemblies on the circuit board is set according to the preset angle, the x Hall detection assemblies sense the magnetic pole change of the magnetic ring to correspondingly generate x-path sensing signals when the driving part drives the moving part to move, and x is an integer greater than 1;
the control unit is connected with the x Hall detection assemblies and judges whether the moving part is blocked or not according to the x paths of induction signals;
when x is an even number, the x Hall detection assemblies are symmetrically arranged on two sides of a vertical line between the circuit board and the circle center of the magnetic ring; when x is an odd number, the (x +1)/2 th Hall detection assemblies are arranged opposite to a vertical line between the circuit board and the circle center of the magnetic ring, and the rest (x-1) Hall detection assemblies are symmetrically arranged on two sides of the vertical line between the circuit board and the circle center of the magnetic ring; wherein, only one vertical line exists between the circuit board and the circle center of the magnetic ring;
when a plurality of N magnetic poles are distributed on the detection surface of the magnetic ring, a first blank area is arranged between the adjacent N magnetic poles; when a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring, a second blank area is arranged between the adjacent S magnetic poles, wherein the width of the N magnetic pole or the S magnetic pole on the magnetic ring is 1-2 mm;
the preset angle comprises a first preset angle and a second preset angle, wherein x adjacent Hall detection assemblies in the Hall detection assemblies stagger the first preset angle according to the sum of the number of the N magnetic pole and the number of the first blank area, or x adjacent Hall detection assemblies in the Hall detection assemblies stagger the second preset angle according to the sum of the number of the S magnetic pole and the number of the second blank area.
2. The detecting and controlling device for the moving parts in the air conditioner according to claim 1, wherein the hall detecting component is a patch type hall detecting element.
3. The detecting and controlling device for the moving parts in the air conditioner as claimed in claim 2, wherein the detecting surface of the magnetic ring is a peripheral side surface of the magnetic ring.
4. The detecting and controlling device of the moving part in the air conditioner according to claim 1, wherein when x is an even number, the straight line distance between the ith hall sensing element and the (i +1) th hall sensing element on the circuit board is obtained according to the following formula:
when i is less than x/2, L ═ R × tan ((x/2-i) × d + d/2) -R × tan ((x/2-i-1) × d + d/2);
when i is equal to x/2, L ═ 2R × tan (d/2);
when i is greater than x/2, L ═ R × tan ((i-x/2) × d + d/2) -R × tan ((i-x/2-1) × d + d/2);
wherein i is 1, 2, …, (x-1), L is a linear distance between the ith hall detection assembly and the (i +1) th hall detection assembly on the circuit board, R is a vertical distance between the circuit board and the center of the magnetic ring, and d is the preset angle.
5. The detecting and controlling device of the moving part in the air conditioner according to claim 1, wherein when x is an odd number, the straight line distance between the ith hall sensing element and the (i +1) th hall sensing element on the circuit board is obtained according to the following formula:
when i is less than (x +1)/2, L ═ R × tan (((x +1)/2-i) × d) -R × tan (((x +1)/2-i-1) × d);
when i is equal to or greater than (x +1)/2, L ═ R × tan ((i- (x +1)/2+1) × d) -R × tan ((i- (x +1)/2) × d);
wherein i is 1, 2, …, (x-1), L is a linear distance between the ith hall detection assembly and the (i +1) th hall detection assembly on the circuit board, R is a vertical distance between the circuit board and the center of the magnetic ring, and d is the preset angle.
6. The apparatus for controlling detection of a moving part in an air conditioner according to claim 1, wherein the first and second preset angles are determined according to the following formulas:
d＝360°/s/x+n*2*360°/s
wherein d is the first preset angle and the second preset angle, x is the number of the hall detection assemblies, N is an integer, and S is the sum of the number of the N magnetic poles and the first blank area when a plurality of N magnetic poles are distributed on the detection surface of the magnetic ring at intervals, or the sum of the number of the S magnetic poles and the second blank area when a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring at intervals.
7. The apparatus for controlling detection of a moving part in an air conditioner according to claim 6,
when a plurality of N magnetic poles are distributed on the detection surface of the magnetic ring at intervals, the width of each N magnetic pole is the same; or
When a plurality of S magnetic poles are distributed on the detection surface of the magnetic ring at intervals, the width of each S magnetic pole is the same.
8. The apparatus as claimed in claim 1, wherein the driving unit comprises a driving motor, and the magnetic ring is fixed to a rotating member of the driving motor.
9. The apparatus for detecting and controlling a moving part of an air conditioner according to claim 8, wherein the rotating member of the driving motor is a transmission gear or a driving shaft.
10. The apparatus as claimed in claim 1, wherein the magnetic ring has a fixing hole, and the magnetic ring is riveted to the driving member through the fixing hole.
11. The apparatus for controlling detection of a moving part in an air conditioner according to claim 1,
when the plurality of N magnetic poles are distributed on each layer of magnetic ring at intervals, the corresponding Hall detection assembly generates a first level when facing the N magnetic poles, and generates a second level when facing the first blank area;
when the plurality of S magnetic poles are distributed on each layer of magnetic ring at intervals, the corresponding Hall detection assembly generates a first level when facing the S magnetic poles, and generates a second level when facing the second blank area.
12. The apparatus of claim 11, wherein the x-path sensing signal is configured to have y level state combinations, y > x, and the control unit comprises:
a timer for starting timing when a combination of level states changes to time the duration of each of the y detection states;
and the control chip is connected with the timer, and judges that the moving part is blocked when the duration of any combination of the level states is greater than a preset time threshold.
13. The apparatus of claim 12, wherein the number y of the level state combinations is x times the number of the level states of each of the sensing signals.
14. An air conditioner characterized by comprising a detection control device of a moving part in the air conditioner according to any one of claims 1 to 13.
CN201710405381.5A 2017-01-05 2017-05-31 Air conditioner and detection control device for moving part in air conditioner Active CN107045146B (en)

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