CN204239301U - Fan - Google Patents
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- CN204239301U CN204239301U CN201420734612.9U CN201420734612U CN204239301U CN 204239301 U CN204239301 U CN 204239301U CN 201420734612 U CN201420734612 U CN 201420734612U CN 204239301 U CN204239301 U CN 204239301U
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Abstract
The utility model discloses a kind of fan, fan comprises: chassis; Lower pillar stand, lower pillar stand is located on chassis; Upper pillar stand, upper pillar stand is located on lower pillar stand rotationally and the rotation axis of upper pillar stand is vertically directed; Shake the head driving mechanism in left and right, left and right driving mechanism of shaking the head is connected to drive upper pillar stand to rotate relative to lower pillar stand respectively with lower pillar stand with upper pillar stand; Fan head support, fan head support to be located on upper pillar stand and to rotate with upper pillar stand; Fan head, fan head be located at rotationally fan head support on and fan head rotation axis directed in the horizontal direction; To shake the head up and down driving mechanism, shake the head up and down driving mechanism respectively with fan head with fan head support and be connected and fan head rotate relative to fanning head support to drive; Panning angle controller, panning angle controller driving mechanism of shaking the head with left and right is respectively connected with driving mechanism of shaking the head up and down.Can realize up and down and hunt according to the fan of the utility model embodiment, have that swaying angle is adjustable, blowing range large, steadily reliable, advantages of simple structure and simple of shaking the head.
Description
Technical field
The utility model relates to electrical equipment manufacturing technology field, in particular to a kind of fan.
Background technique
Fan in correlation technique, generally only provide fan head left and right yaw motion, pitching movement can only move fan head by hand, and can provide the fan of composite oscillating, and panning angle is non-adjustable, and panning angle is very little.
Model utility content
The utility model is intended to solve one of above-mentioned technical problem in correlation technique at least to a certain extent.For this reason, the utility model proposes a kind of fan, this fan can realize up and down and hunt, has that swaying angle is adjustable, blowing range large, steadily reliable, advantages of simple structure and simple of shaking the head.
For achieving the above object, a kind of fan of proposition of the present utility model, described fan comprises: chassis; Lower pillar stand, described lower pillar stand is located on described chassis; Upper pillar stand, described upper pillar stand is located on described lower pillar stand rotationally, and the rotation axis of described upper pillar stand is vertically directed; Shake the head driving mechanism in left and right, described left and right driving mechanism of shaking the head is connected with described lower pillar stand with described upper pillar stand to drive described upper pillar stand to rotate relative to described lower pillar stand respectively; Fan head support, described fan head support is located on described upper pillar stand, and described fan head support rotates with described upper pillar stand; Fan head, described fan head is located on described fan head support rotationally, and the rotation axis of described fan head is directed in the horizontal direction; Shake the head up and down driving mechanism, described driving mechanism of shaking the head up and down is connected with described fan head support with described fan head to drive described fan head to rotate relative to described fan head support respectively; Panning angle controller, described panning angle controller driving mechanism of shaking the head with described left and right is respectively connected with described driving mechanism of shaking the head up and down.
According to fan of the present utility model, can realize up and down and hunt, have that swaying angle is adjustable, blowing range large, steadily reliable, advantages of simple structure and simple of shaking the head.
In addition, following additional technical characteristics can also be had according to fan of the present utility model:
Described left and right driving mechanism of shaking the head comprises: left and right head-shaking motor, and described left and right head-shaking motor is located in described upper pillar stand and described lower pillar stand, and described panning angle controller is connected with described left and right head-shaking motor; Shake the head driving gear in left and right, shake the head driving gear and described left and right head-shaking motor of described left and right is in transmission connection; Shake the head driven gear in left and right, described left and right shake the head that driven gear is located in described upper pillar stand and described lower pillar stand another on, and shake the head in described left and right, driven gear and described left and right driving gear of shaking the head engages.
The shake the head outer diameter of driving gear of described left and right is less than described left and right and shakes the head the outer diameter of driven gear.
Described upper pillar stand is provided with left and right and shakes the head support, and described left and right head-shaking motor is located at described left and right and shakes the head on support, and described left and right driven gear of shaking the head is set on described lower pillar stand.
Described left and right support of shaking the head is provided with two spacing block sets, and two described spacing block sets are positioned at described left and right and shake the head the outside of driven gear, and two described spacing block sets described left and right shake the head driven gear radial direction on relatively.
Described driving mechanism of shaking the head up and down comprises: head-shaking motor up and down, and described upper and lower head-shaking motor is located in described fan head and described fan head support, and described panning angle controller is connected with described upper and lower head-shaking motor; Shake the head up and down driving gear, described driving gear and the described upper and lower head-shaking motor of shaking the head up and down is in transmission connection; Shake the head up and down driving gear, described driving gear of shaking the head up and down is located on described in described fan head and described fan head support, and described driving gear of shaking the head up and down engages with described driving gear of shaking the head up and down; Shake the head up and down driven gear, described driven gear of shaking the head up and down is located on another in described fan head and described fan head support, and described driven gear of shaking the head up and down engages with described driving gear of shaking the head up and down.
Described outer diameter of shaking the head driving gear is up and down less than the outer diameter of described driving gear of shaking the head up and down, and described outer diameter of shaking the head driving gear is up and down less than the outer diameter of described driven gear of shaking the head up and down.
Described fan head comprises: support of shaking the head up and down, described bracket-rotatable of shaking the head up and down is located on described fan head support dynamicly, and the rotation axis of described support of shaking the head up and down is directed in the horizontal direction, described upper and lower head-shaking motor and described driving gear of shaking the head up and down are located at described shaking the head up and down on support, and described driven gear of shaking the head up and down is located on described fan head support; Blade motor, described blade motor is located at described shaking the head up and down on support; Fan blade, described fan blade is connected with described blade motor transmission.
Described support of shaking the head up and down is that opening is in the horizontal direction towards the U-shaped support away from described fan blade.
Described fan head support is opening up U-shaped support.
Accompanying drawing explanation
Fig. 1 is the structural representation of the fan according to the utility model embodiment.
Fig. 2 is the partial structurtes schematic diagram of the fan according to the utility model embodiment.
Fig. 3 is the partial structurtes schematic diagram of the fan according to the utility model embodiment.
Reference character: fan 1, chassis 100, lower pillar stand 200, upper pillar stand 300, shake the head support 310 in left and right, spacing block set 320, shake the head driving mechanism 400 in left and right, left and right head-shaking motor 410, shake the head driving gear 420 in left and right, shake the head driven gear 430 in left and right, fan head support 500, fan 600, to shake the head up and down support 610, spacing preiection 611, blade motor 620, fan blade 630, to shake the head up and down driving mechanism 700, upper and lower head-shaking motor 710, to shake the head up and down driving gear 720, to shake the head up and down driving gear 730, to shake the head up and down driven gear 740.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Below with reference to the accompanying drawings fan 1 according to the utility model embodiment is described.
As shown in Figure 1-Figure 3, comprise chassis 100 according to the fan 1 of the utility model embodiment, driving mechanism 400 is shaken the head in lower pillar stand 200, upper pillar stand 300, left and right, fan head support 500, fan 600, to shake the head driving mechanism 700 and panning angle controller (not shown) up and down, above-below direction is as shown in the arrow A in Fig. 1-Fig. 3.
Lower pillar stand 200 is located on chassis 100.Upper pillar stand 300 is located on lower pillar stand 200 rotationally, and the rotation axis of upper pillar stand 300 is vertically directed.Left and right driving mechanism 400 of shaking the head is connected to drive upper pillar stand 300 to rotate relative to lower pillar stand 200 with upper pillar stand 300 respectively with lower pillar stand 200.Fan head support 500 is located on upper pillar stand 300, and rotates with upper pillar stand 300.Fan 600 is located on fan head support 500 rotationally, and the rotation axis of fan 600 is directed in the horizontal direction.Shake the head up and down driving mechanism 700 respectively with fan 600 with fan head support 500 and be connected and fan 600 rotate relative to fanning head support 500 to drive.Described panning angle controller driving mechanism 400 of shaking the head with left and right is respectively connected with driving mechanism 700 of shaking the head up and down.
According to the fan 1 of the utility model embodiment, by upper pillar stand 300 is located on lower pillar stand 200 rotationally, and left and right is set shakes the head driving mechanism 400, fan 600 can be made can to shake the head at left and right directions with upper pillar stand 300, left and right directions can be realized to make fan 1 and shake the head.By fan 600 being located at rotationally on fan head support 500, and driving mechanism 700 of shaking the head up and down is set, fan 600 can be made can to shake at above-below direction, above-below direction can be realized to make fan 1 to shake the head, thus fan 1 not only can be shaken the head but also can shake the head left and right up and down, thus realize multi-angle air-supply on a large scale, improve the practicability of fan 1.
And, by arranging described panning angle controller, left and right can be controlled respectively by panning angle controller to shake the head driving mechanism 400 and driving mechanism 700 of shaking the head up and down, to shake the head the angle of shaking the head with left and right to control to fan about 600, thus the panning angle realizing fan 1 be adjustable, such as, when using as air circulation fan, wind direction can be tuned up, when using people, blowing range can be regulated, to improve the practicability of fan 1 further according to number.
In addition, be located between upper pillar stand 300 and lower pillar stand 200 by driving mechanism 400 of being shaken the head in left and right, it is more steady when fan about 600 not only can be made to shake the head, and because shake the head up and down driving mechanism 700 and left and right driving mechanism 400 of shaking the head is distant, driving mechanism 700 and left and right driving mechanism 400 of shaking the head of can avoiding on the one hand shaking the head up and down disturbs mutually, thus ensure the operational reliability of fan 1, so that simplify the structure of fan 1, structural design and the manufacture of fan 1 can be convenient on the other hand.
Therefore, can realize up and down and hunt according to the fan 1 of the utility model embodiment, have that swaying angle is adjustable, blowing range large, steadily reliable, advantages of simple structure and simple of shaking the head.
Below with reference to the accompanying drawings fan 1 according to the utility model specific embodiment is described.
In specific embodiments more of the present utility model, as shown in Figure 1-Figure 3, comprise chassis 100 according to the fan 1 of the utility model embodiment, driving mechanism 400 is shaken the head in lower pillar stand 200, upper pillar stand 300, left and right, fan head support 500, fan 600, to shake the head driving mechanism 700 and described panning angle controller up and down.Particularly, the scope of shaking the head up and down of fan 1 can be 105 degree, the left and right scope of shaking the head can be 180 degree.
As shown in Figure 2, shake the head driven gear 430 in left and right driving gear 420 of shaking the head that driving mechanism 400 can comprise left and right head-shaking motor 410, shake the head in left and right and left and right.
Left and right head-shaking motor 410 can be located in upper pillar stand 300 and lower pillar stand 200, and described panning angle controller can be connected with left and right head-shaking motor 410, by controlling the angle that rocks from side to side turning to regulation fan head 600 of left and right head-shaking motor 410.Left and right driving gear 420 of shaking the head can be in transmission connection with left and right head-shaking motor 410.Left and right shake the head that driven gear 430 can be located in upper pillar stand 300 and lower pillar stand 200 another on, and shake the head in left and right, driven gear 430 can engage with left and right driving gear 420 of shaking the head.Left and right head-shaking motor 410 can be utilized thus to drive left and right to shake the head driving gear 420, and drive left and right to shake the head driven gear 430 by left and right the shake the head engagement of driven gear 430 of driving gear 420 and left and right of shaking the head, thus drive upper pillar stand 300 to rotate, to ensure that driving mechanism 400 is shaken the head to a fan 600 driving effect rocked from side to side in left and right.
Advantageously, as shown in Figure 2, the shake the head outer diameter of driving gear 420 of left and right can be less than left and right and to shake the head the outer diameter of driven gear 430.The shake the head rotating speed of driven gear 430 of left and right can be made thus to be less than left and right and to shake the head the rotating speed of driving gear 420, thus the rotating speed of the upper pillar stand 300 that slows down, improve torsion when upper pillar stand 300 rotates, fan about 1 is shaken the head more steady.
Particularly, as depicted in figs. 1 and 2, upper pillar stand 300 can be provided with left and right and to shake the head support 310, left and right head-shaking motor 410 can be located at left and right and shake the head on support 310, and left and right driven gear 430 of shaking the head can be set on lower pillar stand 200.Thus not only can the installation of driven gear 430 so that shake the head in left and right head-shaking motor 410 and left and right, and can prevent left and right head-shaking motor 410 and upper pillar stand 300 from relative movement occurring, thus it is more reliable and more stable that fan about 1 is shaken the head.
Wherein, as shown in Figure 2, shake the head and support 310 can be provided with two spacing block sets, 320, two spacing block sets 320 and can be positioned at left and right and to shake the head the outside of driven gear 430 in left and right, and two spacing block sets 320 can left and right shake the head driven gear 430 radial direction on relatively.The maximum rotation angle that two spacing block sets 320 can be utilized thus to limit fan about 1 shake the head, thus prevent fan 1 rotation angle excessive and affect user and use.In addition, two spacing block sets 320 the coaxality that can also ensure upper pillar stand 300 and lower pillar stand 200 is set.
Fig. 1-Fig. 3 shows the fan 1 according to the utility model concrete example.As shown in figures 1 and 3, driving mechanism 700 of shaking the head up and down can comprise upper and lower head-shaking motor 710, up and down shake the head driving gear 720, to shake the head driving gear 730 and driven gear 740 of shaking the head up and down up and down.
Upper and lower head-shaking motor 710 can be located in fan 600 and fan head support 500, and described panning angle controller can be connected with upper and lower head-shaking motor 710, by controlling the angle that fluctuates turning to regulation fan head 600 of upper and lower head-shaking motor 710.Driving gear 720 of shaking the head up and down can be in transmission connection with upper and lower head-shaking motor 710.Driving gear 730 of shaking the head up and down can be located on described in fan 600 and fan head support 500, and driving gear 730 of shaking the head up and down can engage with driving gear 720 of shaking the head up and down.Driven gear 740 of shaking the head up and down can be located on another in fan 600 and fan head support 500, and driven gear 740 of shaking the head up and down can engage with driving gear 730 of shaking the head up and down.Upper and lower head-shaking motor 710 can be utilized thus to drive driving gear 720 of shaking the head up and down, and drive driven gear 740 of shaking the head up and down to rotate by driving gear 730 of shaking the head up and down, thus drive fan 600 rotation, ensure that upper and lower head-shaking motor 710 is to a fan 600 driving effect fluctuated.
Advantageously, as shown in Figure 3, the outer diameter of driving gear 720 of shaking the head up and down can be less than the outer diameter of driving gear 730 of shaking the head up and down, and the outer diameter of driving gear 730 of shaking the head up and down can be less than the outer diameter of driven gear 740 of shaking the head up and down.The rotating speed of driven gear 740 of can making thus to shake the head up and down is less than the rotating speed of driving gear 730 of shaking the head up and down, the rotating speed of driving gear 730 of shaking the head up and down is less than the rotating speed of driving gear 720 of shaking the head up and down, thus the rotational velocity of the fan 600 that slows down, improve torsion when fan 600 rotates, more steady to make fan about 1 shake the head.
Particularly, as shown in Figure 3, shake the head up and down support 610 outer surface on can be provided with spacing preiection 611.Can utilize thus spacing preiection 611 limit fan about 600 maximum angle of shaking the head, thus prevent fan 1 about panning angle excessive affect user use.
Alternatively, as shown in Figures 2 and 3, left and right shake the head driven gear 430 and shake the head up and down driven gear 740 can be partial gear, in other words, left and right driven gear 430 of shaking the head only can be provided with tooth on the surface of driving gear 420 of shaking the head towards left and right, and driven gear 740 of shaking the head up and down only can be provided with tooth on the surface towards driving gear 730 of shaking the head up and down.Thus not only can the manufacture of driven gear 430 and driven gear 740 of shaking the head up and down so that shake the head in left and right, save processing and cost of material, and fan 1 panning angle can be prevented further excessive and affect user's use, space can be saved in addition to be convenient to structural design further.
Fig. 1 and Fig. 3 shows the fan 1 according to the utility model specific embodiment.As shown in figures 1 and 3, fan 600 can comprise support 610 of shaking the head up and down, blade motor 620 and fan blade 630.Support 610 of shaking the head up and down can be located on fan head support 500 rotationally, and the rotation axis of support 610 of shaking the head up and down can be directed in the horizontal direction, upper and lower head-shaking motor 710 and driving gear 730 of shaking the head up and down can be located at shakes the head on support 610 up and down, and driven gear 740 of shaking the head up and down can be located on fan head support 500.Blade motor 620 can be located at shakes the head on support 610 up and down.Fan blade 630 can be connected with blade motor 620 transmission.Thus not only can so that the installation of blade motor 620 and fan blade 630, and can so that fan 600 is installed in rotation on fan head support 500.
Particularly, as shown in figures 1 and 3, shaking the head support 610 up and down can for opening be in the horizontal direction towards the U-shaped support away from fan blade 630.Thus not only can so that the installation of blade motor 620 and fan blade 630, and can so that the maintenance of blade motor 620.
Alternatively, as shown in figures 1 and 3, fanning head support 500 can be opening up U-shaped support.Fan 600 can be realized thus to be located at rotationally on fan head support 500, and structure is simple, easy processing, is convenient to fan 600 about and rocks from side to side.
According to the fan 1 of the utility model embodiment other form and operation be all known for those of ordinary skills, be not described in detail here.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.In addition, the different embodiment described in this specification or example can carry out engaging and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (10)
1. a fan, is characterized in that, comprising:
Chassis;
Lower pillar stand, described lower pillar stand is located on described chassis;
Upper pillar stand, described upper pillar stand is located on described lower pillar stand rotationally and the rotation axis of described upper pillar stand is vertically directed;
Shake the head driving mechanism in left and right, described left and right driving mechanism of shaking the head is connected with described lower pillar stand with described upper pillar stand to drive described upper pillar stand to rotate relative to described lower pillar stand respectively;
Fan head support, described fan head support to be located on described upper pillar stand and to rotate with described upper pillar stand;
Fan head, described fan head is located on described fan head support rotationally and the rotation axis of described fan head is directed in the horizontal direction;
Shake the head up and down driving mechanism, described driving mechanism of shaking the head up and down is connected with described fan head support with described fan head to drive described fan head to rotate relative to described fan head support respectively;
Panning angle controller, described panning angle controller driving mechanism of shaking the head with described left and right is respectively connected with described driving mechanism of shaking the head up and down.
2. fan according to claim 1, is characterized in that, described left and right driving mechanism of shaking the head comprises:
Left and right head-shaking motor, described left and right head-shaking motor is located in described upper pillar stand and described lower pillar stand, and described panning angle controller is connected with described left and right head-shaking motor;
Shake the head driving gear in left and right, shake the head driving gear and described left and right head-shaking motor of described left and right is in transmission connection;
Shake the head driven gear in left and right, described left and right shake the head that driven gear is located in described upper pillar stand and described lower pillar stand another on and engage with described left and right driving gear of shaking the head.
3. fan according to claim 2, is characterized in that, the shake the head outer diameter of driving gear of described left and right is less than described left and right and shakes the head the outer diameter of driven gear.
4. fan according to claim 2, is characterized in that, described upper pillar stand is provided with left and right and shakes the head support, and described left and right head-shaking motor is located at described left and right and shakes the head on support, and described left and right driven gear of shaking the head is set on described lower pillar stand.
5. fan according to claim 4, is characterized in that, described left and right support of shaking the head is provided with two spacing block sets, two described spacing block sets be positioned at described left and right shake the head driven gear outside and described left and right shake the head driven gear radial direction on relatively.
6. the fan according to any one of claim 1-5, is characterized in that, described driving mechanism of shaking the head up and down comprises:
Upper and lower head-shaking motor, described upper and lower head-shaking motor is located in described fan head and described fan head support, and described panning angle controller is connected with described upper and lower head-shaking motor;
Shake the head up and down driving gear, described driving gear and the described upper and lower head-shaking motor of shaking the head up and down is in transmission connection;
To shake the head up and down driving gear, described driving gear of shaking the head up and down be located in described fan head and described fan head support described one upper and engage with described driving gear of shaking the head up and down;
Shake the head up and down driven gear, described driven gear of shaking the head up and down is located in described fan head and described fan head support on another and engages with described driving gear of shaking the head up and down.
7. fan according to claim 6, it is characterized in that, described outer diameter of shaking the head driving gear is up and down less than the outer diameter of described driving gear of shaking the head up and down, and described outer diameter of shaking the head driving gear is up and down less than the outer diameter of described driven gear of shaking the head up and down.
8. fan according to claim 6, is characterized in that, described fan head comprises:
To shake the head up and down support, described bracket-rotatable of shaking the head up and down is located on described fan head support with moving and the rotation axis of described support of shaking the head up and down is directed in the horizontal direction, described upper and lower head-shaking motor and described driving gear of shaking the head up and down are located at described shaking the head up and down on support, and described driven gear of shaking the head up and down is located on described fan head support;
Blade motor, described blade motor is located at described shaking the head up and down on support;
Fan blade, described fan blade is connected with described blade motor transmission.
9. fan according to claim 8, is characterized in that, described support of shaking the head up and down is that opening is in the horizontal direction towards the U-shaped support away from described fan blade.
10. fan according to claim 1, is characterized in that, described fan head support is opening up U-shaped support.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420734612.9U CN204239301U (en) | 2014-11-27 | 2014-11-27 | Fan |
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| CN201420734612.9U CN204239301U (en) | 2014-11-27 | 2014-11-27 | Fan |
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| CN112949347A (en) * | 2019-11-26 | 2021-06-11 | 佛山市云米电器科技有限公司 | Fan adjusting method based on human body posture, fan and storage medium |
| CN113236592A (en) * | 2021-06-08 | 2021-08-10 | 工奇精密工业(澳门)有限公司 | Fan and working method thereof |
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| CN105570167A (en) * | 2015-09-02 | 2016-05-11 | 广东美的环境电器制造有限公司 | Shaking mechanism of household appliance and household appliance |
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