CN110905843A - Electric fan - Google Patents
Electric fan Download PDFInfo
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- CN110905843A CN110905843A CN201911260618.0A CN201911260618A CN110905843A CN 110905843 A CN110905843 A CN 110905843A CN 201911260618 A CN201911260618 A CN 201911260618A CN 110905843 A CN110905843 A CN 110905843A
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- electric fan
- detection sensor
- machine head
- mounting disc
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- 238000001514 detection method Methods 0.000 claims abstract description 88
- 230000000903 blocking effect Effects 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
- F04D25/10—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air
- F04D25/105—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air by changing rotor axis direction, e.g. oscillating fans
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention provides an electric fan, comprising: a base; the machine head is rotatably arranged on the base through a rotating shaft; the mounting disc is arranged on the rotating shaft, a plurality of light blocking sheets are arranged on the mounting disc in a protruding mode, the lengths L of the light blocking sheets in the circumferential direction of the mounting disc are different, and the light blocking sheets correspond to different angle positions of the machine head in the rotating direction of the machine head; the photoelectric detection sensor is provided with a detection area, and is switched on and sends a switching-on signal to the outside in the process that each light barrier rotates to pass through the detection area; and the processor is connected with the photoelectric detection sensor and acquires the angle position of the handpiece according to the position of the light blocking sheet. The invention solves the problems that the electric fan with the 360-degree rotating machine head in the prior art is complex in structure, a conductive ring is usually used for supplying power to the machine head so as to control the rotating angle of the electric fan, and meanwhile, a specific angle detection sensor is used for monitoring the position of the machine head in real time, so that the whole processing and manufacturing cost is high and the economical efficiency is poor.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to an improved structure of an electric fan.
Background
The machine head of a common electric fan on the market rotates to sweep the wind at a fixed angle, and the machine head is limited on the rotating path of the machine head, so that the machine head rotates left and right within a set angle range to sweep the wind.
In order to improve the practicability of the electric fan and enable the electric fan to have a wider-angle wind sweeping surface, the electric fan in the prior art can rotate 360 degrees to sweep wind, the electric fan is complex in structure, a conductive ring is usually used for supplying power to the machine head to control the rotating angle of the electric fan, and meanwhile, a specific angle detection sensor is used for monitoring the position of the machine head in real time, so that the overall processing and manufacturing cost of the electric fan is greatly improved, and the electric fan is not beneficial to improving the economy.
Disclosure of Invention
The invention mainly aims to provide an electric fan, which aims to solve the problems that the electric fan with a 360-degree rotating machine head in the prior art is complex in structure, a conductive ring is usually used for supplying power to the machine head so as to control the rotating angle of the electric fan, and meanwhile, a specific angle detection sensor is used for monitoring the position of the machine head in real time, so that the whole processing and manufacturing cost is high and the economical efficiency is poor.
In order to achieve the above object, according to one aspect of the present invention, there is provided an electric fan including: a base; the machine head is rotatably arranged on the base through a rotating shaft; the mounting disc is arranged on the rotating shaft along the radial plane of the rotating shaft, a plurality of light blocking sheets are arranged on the mounting disc in a protruding mode and are arranged around the circumferential direction of the mounting disc at intervals, a light transmission gap is formed between every two adjacent light blocking sheets, the length L of each light blocking sheet in the circumferential direction of the mounting disc is different, and each light blocking sheet corresponds to different angle positions of the machine head in the rotating direction of the machine head; the photoelectric detection sensor is arranged opposite to the mounting disc along the axial direction of the mounting disc, the photoelectric detection sensor is provided with a detection area, an annular path formed by a plurality of light blocking sheets passes through the detection area, and the photoelectric detection sensor is conducted and sends a conducting signal outwards in the process that each light-transmitting gap passes through the detection area; and the processor is connected with the photoelectric detection sensor and used for receiving and processing the conduction signals, calibrating the light barrier passing through the detection area according to the duration of the received two adjacent conduction signals, and acquiring the angle position of the handpiece according to the position of the light barrier.
Further, the lengths L of the plurality of light-blocking sheets sequentially increase or sequentially decrease in the circumferential direction of the mounting plate.
Further, along the circumferential direction of the mounting disc, the lengths L of the light blocking sheets are gradually increased or gradually decreased according to an arithmetic progression.
Furthermore, the tolerance of the arithmetic progression is not less than 1mm and not more than 10 mm.
Furthermore, the electric fan also comprises a motor, the motor is in driving connection with the rotating shaft, and the central angle A corresponding to one light blocking sheet with the smallest length in the plurality of light blocking sheets is larger than or equal to the step angle of the motor.
Further, the stepping angle of the motor is greater than or equal to 0.75 ° and less than or equal to 10 °.
Further, the photoelectric detection sensor comprises a light emitting end and a light receiving end, the light emitting end and the light receiving end are respectively located on two sides of the detection area, and when the light receiving end receives light emitted by the light emitting end, the photoelectric detection sensor generates a conduction signal.
Furthermore, an emitting gap and a receiving gap which are oppositely arranged are formed on the photoelectric detection sensor, the light emitting end emits light to the light receiving end through the emitting gap, and the light receiving end receives the light through the receiving gap.
Further, the widths of the emission slit and the reception slit are smaller than the length of the one of the plurality of light-blocking sheets having the smallest length.
Furthermore, the number of the light blocking sheets is more than or equal to 2 and less than or equal to 20.
Further, the photoelectric detection sensor is an infrared correlation photoelectric sensor.
According to another aspect of the present invention, there is provided an electric fan including: a base; the machine head is rotatably arranged on the base through a rotating shaft; the mounting disc is arranged on the rotating shaft along the radial plane of the rotating shaft, a plurality of light reflecting sheets are arranged on the mounting disc in a protruding mode and are arranged around the circumferential direction of the mounting disc at intervals, a gap is formed between every two adjacent light reflecting sheets, the length L of each light reflecting sheet in the circumferential direction of the mounting disc is different, and each light reflecting sheet corresponds to different angle positions of the machine head in the rotating direction of the machine head; the photoelectric detection sensor is provided with a light emitting end and a light receiving end which are arranged opposite to the reflecting sheet in the radial direction of the mounting disc, light emitted by the light emitting end is received by the light receiving end after being reflected by the reflecting sheet, and the photoelectric detection sensor is conducted and sends a conducting signal outwards; and the processor is connected with the photoelectric detection sensor and used for receiving and processing the conduction signals, calibrating the reflector passing through the detection area according to the duration of the received two adjacent conduction signals, and acquiring the angle position of the handpiece according to the position of the reflector.
Further, the photoelectric detection sensor is a reflection type photoelectric sensor.
By applying the technical scheme of the invention, the electric fan is structurally improved, and the detection function of the rotating position of the machine head is realized in a mode that the photoelectric detection sensor and the processor are matched with the mounting plate arranged on the rotating shaft, so that the effect of accurately detecting the position of the machine head in real time is achieved, the rotating angle of the machine head is favorably controlled, the performance of the electric fan is improved on the premise of avoiding greatly improving the overall cost of the electric fan, and the practicability of the electric fan is improved.
Specifically, a plurality of light blocking sheets which are arranged around the circumferential direction of the mounting disc at intervals are arranged on the mounting disc in a protruding mode, so that a light transmission gap is formed between every two adjacent light blocking sheets, the lengths L of the light blocking sheets along the circumferential direction of the mounting disc are different, and the light blocking sheets correspond to different angle positions of the machine head in the rotating direction of the machine head; and then, utilizing a conducting signal which is sent by the photoelectric detection sensor and contains the time length of each light barrier rotating to pass through the detection area of the photoelectric detection sensor, utilizing the processor to calibrate the light barrier passing through the detection area according to the time length of the received two adjacent conducting signals, and acquiring the angle position of the handpiece according to the position of the light barrier. Therefore, the photoelectric detection sensor and the processor are matched with the mounting disc with a specific structure, so that the accurate detection of the position of the machine head of the electric fan can be ensured, the rotation angle of the machine head can be controlled, and the practicability of the electric fan is improved; and the structural complexity of the electric fan cannot be greatly increased, the use of an angle detection sensor with high price and complex structure is avoided, the overall cost of the electric fan is controlled, and the economical efficiency of the electric fan is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic top view of a mounting plate according to an alternative embodiment of the invention;
fig. 2 is a front view schematically showing a mounting plate of an electric fan and a position relation of a photoelectric detection sensor according to a first embodiment of the invention;
FIG. 3 is a schematic top view showing the position relationship between the light blocking plate and the photoelectric detection sensor of the mounting plate of the electric fan in FIG. 2;
fig. 4 is a schematic front view showing a relation between a mounting plate of an electric fan and a position of a photoelectric detection sensor according to a second embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. mounting a disc; 11. a light blocking sheet; 12. a light-transmitting gap; 13. a light-reflecting sheet; 20. a photoelectric detection sensor; 100. detecting a region; 21. a light emitting end; 22. a light receiving end; 23. an emission slit; 24. a receiving slot.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an electric fan, aiming at solving the problems that in the prior art, the electric fan with a 360-degree rotating machine head is complex in structure, a conductive ring is usually used for supplying power to the machine head so as to control the rotating angle of the electric fan, and meanwhile, a specific angle detection sensor is used for monitoring the position of the machine head in real time, so that the overall processing and manufacturing cost is high and the economical efficiency is poor.
Example one
As shown in fig. 1 to 3, the electric fan includes a base, a machine head, a mounting plate 10, a photoelectric detection sensor 20 and a processor, wherein the machine head is rotatably disposed on the base through a rotating shaft, the mounting plate 10 is disposed on the rotating shaft along a radial plane of the rotating shaft, a plurality of light-blocking sheets 11 are disposed on the mounting plate 10 at intervals in the circumferential direction of the mounting plate 10, a light-transmitting gap 12 is formed between two adjacent light-blocking sheets 11, the length L of each light-blocking sheet 11 in the circumferential direction of the mounting plate 10 is different, each light-blocking sheet 11 corresponds to different angular positions of the machine head in the rotating direction thereof, the photoelectric detection sensor 20 is disposed opposite to the mounting plate 10 in the axial direction of the mounting plate 10, the photoelectric detection sensor 20 has a detection area 100, an annular path formed by the plurality of light-blocking sheets 11 passes through the detection area 100, and the photoelectric detection sensor 20 is turned on during the process that each, and sending out a conducting signal; the processor is connected to the photoelectric detection sensor 20 and configured to receive and process the conduction signal, calibrate the light barrier 11 passing through the detection area 100 according to the duration of the two received conduction signals, and obtain the angle position of the handpiece according to the position of the light barrier 11.
Through carrying out configuration amendment to the electric fan to photoelectric detection sensor 20 and the mode that the treater cooperation set up mounting disc 10 in the pivot realize the detection function to the turned position of aircraft nose, thereby reached the effect of accurate real-time detection aircraft nose's position, and then be favorable to controlling the turned angle of aircraft nose, under the prerequisite of avoiding promoting electric fan overall cost by a wide margin, promoted the performance of electric fan, improved the practicality of electric fan.
Specifically, a plurality of light blocking sheets 11 arranged around the circumferential direction of the mounting disc 10 at intervals are arranged on the mounting disc 10 in a protruding manner, so that a light transmission gap 12 is formed between two adjacent light blocking sheets 11, the lengths L of the light blocking sheets 11 in the circumferential direction of the mounting disc 10 are different, and the light blocking sheets 11 correspond to different angle positions of the handpiece in the rotation direction of the handpiece; and then, by using the conduction signals which are sent by the photoelectric detection sensor 20 and contain the time length of each light barrier 11 rotating to pass through the detection area 100, the processor is used for calibrating the light barrier 11 passing through the detection area 100 according to the time length of the two received conduction signals which are adjacent to each other, and the angle position of the machine head is obtained according to the position of the light barrier 11. In this way, the photoelectric detection sensor 20 and the processor are matched with the mounting plate 10 with a specific structure, so that not only can the accurate detection of the position of the machine head of the electric fan be ensured, but also the rotation angle of the machine head can be controlled, and the practicability of the electric fan is improved; and the structural complexity of the electric fan cannot be greatly increased, the use of an angle detection sensor with high price and complex structure is avoided, the overall cost of the electric fan is controlled, and the economical efficiency of the electric fan is ensured.
As shown in fig. 1, in order to make the acquired on interval duration of the photodetection sensor 20 regular and reduce the detection difficulty of the detection portion, the lengths L of the plurality of light-blocking sheets 11 are sequentially increased or sequentially decreased along the circumferential direction of the mounting plate 10.
Preferably, the lengths L of the plurality of light-blocking sheets 11 are gradually increased or gradually decreased in an arithmetic progression along the circumferential direction of the mounting plate 10. In this way, regular setting of the plurality of light blocking sheets 11 is facilitated, so that the aesthetic appearance of the mounting disc 10 is ensured, and the detection accuracy of the photoelectric detection sensor 20 on each light blocking sheet 11 is improved.
In order to make the mounting plate 10 suitable for being mounted on rotating shafts with different diameters of electric fans of different models, the tolerance of the arithmetic progression is optionally greater than or equal to 1mm and less than or equal to 10 mm.
It should be noted that, the electric fan further includes a motor, the motor is connected with the rotating shaft in a driving manner, and a central angle a corresponding to one light blocking sheet 11 with the smallest length among the plurality of light blocking sheets 11 is greater than or equal to a step angle of the motor. In this way, it is advantageous to improve the accuracy of the detection of the different angular positions of the handpiece in its direction of rotation.
Optionally, the step angle of the motor is greater than or equal to 0.75 ° and less than or equal to 10 °.
As shown in fig. 2 and 3, the photo sensor 20 includes a light emitting end 21 and a light receiving end 22, the light emitting end 21 and the light receiving end 22 are respectively located at two sides of the detection area 100, and when the light receiving end 22 receives the light emitted from the light emitting end 21, the photo sensor 20 generates a turn-on signal.
In order to ensure that the light emitted from the photo detection sensor 20 has excellent light-gathering characteristics, and thus ensure the stability of the on-signal generated by the photo detection sensor 20, the photo detection sensor 20 is formed with an emitting slit 23 and a receiving slit 24 which are oppositely arranged, the light emitting end 21 emits light to the light receiving end 22 through the emitting slit 23, and the light receiving end 22 receives light through the receiving slit 24.
Note that the widths of the emission slit 23 and the reception slit 24 are smaller than the length of the one light-blocking sheet 11 having the smallest length among the plurality of light-blocking sheets 11. In this way, it can be ensured that the light emitted from the light emitting end 21 can be effectively stopped when each light barrier 11 passes through the detection area 100, so that the light receiving end 22 is in the non-conducting state, and by detecting the duration that the light receiving end 22 continuously does not receive the light, i.e. the duration in the non-conducting state, and corresponding to the position of each light barrier 11, in the process that each light barrier 11 rotates at a constant speed to pass through the detection area 100, the angular position of the handpiece can be reliably obtained.
Optionally, the number of the light-blocking sheets 11 is greater than or equal to 2 and less than or equal to 20.
In the present embodiment, the photodetection sensor 20 is an infrared correlation photosensor.
Example two
As shown in fig. 4, in this embodiment, the electric fan includes a base, a machine head, a mounting plate 10, a photoelectric detection sensor 20 and a processor, the machine head is rotatably disposed on the base through a rotating shaft, the mounting plate 10 is disposed on the rotating shaft along a radial plane of the rotating shaft, a plurality of light-reflecting sheets 13 are protruded on the mounting plate 10 and are disposed at intervals around a circumference of the mounting plate 10, a gap is formed between two adjacent light-reflecting sheets 13, lengths L of the light-reflecting sheets 13 along the circumference of the mounting plate 10 are different, and the light-reflecting sheets 13 correspond to different angular positions of the machine head in a rotating direction thereof, the photoelectric detection sensor 20 has a light-emitting end 21 and a light-receiving end 22 disposed opposite to the light-reflecting sheets 13 in the radial direction of the mounting plate 10, light emitted from the light-emitting end 21 is received by the light-receiving end 22 after being reflected by the light-reflecting sheets 13, the photoelectric, the processor is connected with the photoelectric detection sensor 20 and used for receiving and processing the conduction signals, the processor calibrates the reflector 13 passing through the detection area 100 according to the duration of the received two adjacent conduction signals, and acquires the angle position of the handpiece according to the position of the reflector 13.
This embodiment is similar to the principle of detecting the angular position of the head of the electric fan of the first embodiment, except that the photodetection sensor 20 is a reflective photosensor. What the protruding setting is the reflector plate 13 on mounting disc 10, and reflector plate 13 is used for the light that the reflection of light emission end 21 sent, and light receiving end 22 and light emission end 21 lie in the same side of reflector plate 13 to ensure that light receiving end 22 switches on after receiving light.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. An electric fan, comprising:
a base;
the machine head is rotatably arranged on the base through a rotating shaft;
the mounting disc (10) is arranged on the rotating shaft along the radial plane of the rotating shaft, a plurality of light blocking sheets (11) which are arranged around the mounting disc (10) at intervals are arranged on the mounting disc (10) in a protruding mode, a light transmission gap (12) is formed between every two adjacent light blocking sheets (11), the length L of each light blocking sheet (11) in the circumferential direction of the mounting disc (10) is different, and each light blocking sheet (11) corresponds to different angle positions of the machine head in the rotating direction of the machine head;
the photoelectric detection sensor (20), the photoelectric detection sensor (20) is arranged opposite to the mounting disc (10) along the axial direction of the mounting disc (10), the photoelectric detection sensor (20) is provided with a detection area (100), a plurality of light blocking sheets (11) are arranged in an annular path to pass through the detection area (100), and in the process that each light transmission gap (12) passes through the detection area (100), the photoelectric detection sensor (20) is conducted and sends a conducting signal outwards;
the processor is connected with the photoelectric detection sensor (20) and used for receiving and processing the conduction signals, the processor calibrates the light blocking sheet (11) passing through the detection area (100) according to the time length of the received two adjacent conduction signals, and obtains the angle position of the machine head according to the position of the light blocking sheet (11).
2. The electric fan according to claim 1, wherein the length L of the plurality of light-blocking blades (11) increases sequentially or decreases sequentially in the circumferential direction of the mounting plate (10).
3. The electric fan according to claim 2, wherein the length L of the plurality of light-blocking sheets (11) is gradually increased or decreased in an arithmetic progression along the circumferential direction of the mounting plate (10).
4. The electric fan according to claim 3, wherein the tolerance of the series of equal differences is greater than or equal to 1mm and less than or equal to 10 mm.
5. The electric fan according to claim 1, further comprising a motor drivingly connected to the shaft, wherein a central angle a of a circle corresponding to one of the plurality of light-blocking sheets (11) having a smallest length is greater than or equal to a step angle of the motor.
6. The electric fan as claimed in claim 5, wherein the step angle of the motor is 0.75 ° or more and 10 ° or less.
7. The electric fan according to claim 1, characterized in that the photoelectric detection sensor (20) comprises a light emitting end (21) and a light receiving end (22), the light emitting end (21) and the light receiving end (22) are respectively located at two sides of the detection area (100), and the photoelectric detection sensor (20) generates the on signal when the light receiving end (22) receives the light emitted from the light emitting end (21).
8. The electric fan as claimed in claim 7, wherein the photoelectric detection sensor (20) is formed with an emission slit (23) and a receiving slit (24) which are oppositely arranged, the light emission end (21) emits light to the light receiving end (22) through the emission slit (23), and the light receiving end (22) receives the light through the receiving slit (24).
9. The electric fan according to claim 8, characterized in that the width of the emission slit (23) and the receiving slit (24) is smaller than the length of the one of the light-blocking sheets (11) having the smallest length among the plurality of light-blocking sheets (11).
10. The electric fan according to claim 1, wherein the number of the light-blocking sheets (11) is greater than or equal to 2 and less than or equal to 20.
11. The electric fan according to claim 1, characterized in that the photodetection sensor (20) is an infrared correlation photosensor.
12. An electric fan, comprising:
a base;
the machine head is rotatably arranged on the base through a rotating shaft;
the mounting disc (10) is arranged on the rotating shaft along a radial plane of the rotating shaft, a plurality of light reflecting sheets (13) which are arranged around the mounting disc (10) at intervals are arranged on the mounting disc (10) in a protruding mode, a gap is formed between every two adjacent light reflecting sheets (13), the length L of each light reflecting sheet (13) in the circumferential direction of the mounting disc (10) is different, and each light reflecting sheet (13) corresponds to different angle positions of the machine head in the rotating direction of the machine head;
the photoelectric detection sensor (20) is provided with a light emitting end (21) and a light receiving end (22) which are arranged opposite to the reflector (13) in the radial direction of the mounting disc (10), light emitted by the light emitting end (21) is reflected by the reflector (13) and then received by the light receiving end (22), and the photoelectric detection sensor (20) is conducted and sends a conducting signal outwards;
the processor is connected with the photoelectric detection sensor (20) and used for receiving and processing the conduction signals, the processor marks the reflector (13) passing through the detection area (100) according to the duration of the received two adjacent conduction signals, and the angle position of the machine head is obtained according to the position of the reflector (13).
13. The electric fan according to claim 12, characterized in that the photoelectric detection sensor (20) is a reflective photoelectric sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911260618.0A CN110905843A (en) | 2019-12-10 | 2019-12-10 | Electric fan |
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| CN201911260618.0A CN110905843A (en) | 2019-12-10 | 2019-12-10 | Electric fan |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847889A (en) * | 2021-01-29 | 2021-12-28 | 上海西门子开关有限公司 | Device, method and system for measuring angle of connecting arm of main shaft of circuit breaker |
| CN114893426A (en) * | 2022-06-24 | 2022-08-12 | 珠海格力电器股份有限公司 | Oscillating fan and control method thereof |
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2019
- 2019-12-10 CN CN201911260618.0A patent/CN110905843A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847889A (en) * | 2021-01-29 | 2021-12-28 | 上海西门子开关有限公司 | Device, method and system for measuring angle of connecting arm of main shaft of circuit breaker |
| CN114893426A (en) * | 2022-06-24 | 2022-08-12 | 珠海格力电器股份有限公司 | Oscillating fan and control method thereof |
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