CN104763689B - Machine head for bladeless fan and bladeless fan with the machine head - Google Patents
Machine head for bladeless fan and bladeless fan with the machine head Download PDFInfo
- Publication number
- CN104763689B CN104763689B CN201510152123.1A CN201510152123A CN104763689B CN 104763689 B CN104763689 B CN 104763689B CN 201510152123 A CN201510152123 A CN 201510152123A CN 104763689 B CN104763689 B CN 104763689B
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- China
- Prior art keywords
- air channel
- head
- bladeless fan
- path wall
- wind path
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Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a machine head for a bladeless fan. The machine head for the bladeless fan comprises a central cavity and multiple air channel cavities; the central cavity can receive the high pressure air flow; multiple air channel cavities communicate with the central cavity and are distributed along the circumferential direction of the central cavity; the air channel cavities are outwards extended from the central cavity; each air channel cavity comprises a first air channel wall and a second air channel wall; the first air channel wall is hollowed along the direction away from the second air channel wall so as to form a first arc face; the second air channel wall is hollowed along the direction away from the first air channel wall so as to form a second arc face; the intersection place of the first arc face and the second arc face forms a first end and a second end opposite to the first end, and the first end is closed; each air channel cavity forms a nozzle passing through the first air channel wall and the second air channel wall at the second end. The invention further discloses the bladeless fan with the machine head. Because multiple air channel cavities distributed along the circumferential direction of the central cavity are formed, the bladeless fan can generate the wind in larger range.
Description
Technical field
The present invention relates to bladeless fan field, more particularly, to a kind of head for bladeless fan and with the head
Bladeless fan.
Background technology
The head of the bladeless fan of prior art is generally the cavity body structure of ring-type, and the radiation scope of the wind of generation is limited.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art.For this purpose, the present invention needs offer one
Plant the head for bladeless fan.
The present invention it is also required to provide a kind of bladeless fan with the head.
According to the head for bladeless fan of better embodiment of the present invention, including central cavity and multiple air channel chambers
Body.The central cavity can house high pressure draught.Multiple air channel cavitys are connected with the central cavity and along the center
The circumferencial direction distribution of cavity, the air channel cavity stretch out from the central cavity.Each described air channel cavity includes
One wind path wall and the second wind path wall, first wind path wall are formed with the first arc along the direction away from second wind path wall is recessed
Shape face, second wind path wall are formed with the second arcwall face, first arc along the direction away from first wind path wall is recessed
Shape face is formed with first end and second end relative with the first end, first end seal with the second arcwall face intersection
Close.Each described air channel cavity is formed through the spray of first wind path wall and second wind path wall at second end
Mouth.Each described air channel cavity includes that at least two radially arrange at second end and are spaced apart first wind
The distance piece of road wall and second wind path wall.
The head for bladeless fan of better embodiment of the present invention, it is multiple along the central cavity due to being formed with
The air channel cavity of circumferencial direction distribution, can produce the wind of more large radiation scope.
In some embodiments, the central cavity is inwardly concaved and is formed with conical guide face.
In some embodiments, the air channel cavity is in aerofoil profile, and each described air channel cavity is along the central cavity
Extend radially outwardly.
In some embodiments, the plurality of air channel cavity is angularly distributed.
In some embodiments, the width of the nozzle is 1mm~5mm.
In some embodiments, the width of the nozzle is 1mm~1.5mm.
In some embodiments, in the circumferential cross-section of the head, first arcwall face is the first camber line, described
Second arcwall face be the second camber line, the first end be first end point, second end be the second end points, the first end point with
The double-pointed line is 10 °~35 ° with the angle of first camber line.
According to the bladeless fan of better embodiment of the present invention, including described in dynamical system and any of the above-described embodiment
For the head of bladeless fan.The dynamical system is used to produce high pressure draught.The head is connected with the dynamical system, is used
The high pressure draught is sprayed in receiving and passing through the nozzle.
In some embodiments, the bladeless fan also includes pedestal and connects the ventilation of the pedestal and the head
Pipe, the ventilation duct pass through hollow ball chain connection so that the head can pitch rotation with the head and the pedestal.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the description with reference to accompanying drawings below to embodiment
Substantially with it is easy to understand, wherein:
Fig. 1 is the stereogram of the head for bladeless fan according to better embodiment of the present invention.
Fig. 2 is the enlarged diagram of the II parts of the head for bladeless fan of Fig. 1.
Fig. 3 is the floor map of the head for bladeless fan according to better embodiment of the present invention.
Fig. 4 is that another embodiment plane of the head for bladeless fan according to better embodiment of the present invention is illustrated
Figure.
Fig. 5 is the schematic cross-section of the head for bladeless fan along V-V of Fig. 4.
Fig. 6 is the schematic cross-section of the head for bladeless fan along VI-VI of Fig. 5.
Fig. 7 is the floor map of the bladeless fan according to better embodiment of the present invention.
Fig. 8 is the schematic cross-section along VIII-VIII of the bladeless fan of Fig. 7.
Fig. 9 is the enlarged diagram of the IX parts of the bladeless fan of Fig. 8.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " center ", " longitudinal direction ", " horizontal ", " length ", " width
Degree ", " thickness ", " go up ", " under ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " bottom ", " interior ", " outward ", "
Clockwise the orientation or position relationship of the instruction such as ", " counterclockwise " be based on orientation shown in the drawings or position relationship, merely to
Be easy to description the present invention and simplify description, rather than indicate or imply indication device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second " are only
For descriptive purposes, and it is not intended that indicating or implying relative importance or the implicit number for indicating indicated technical characteristic
Amount.Thus, define " first ", the feature of " second " can be expressed or implicitly include one or more spy
Levy.In describing the invention, " multiple " are meant that two or more, unless otherwise expressly limited specifically.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected.Can
Being to be mechanically connected, or electrically connect.Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can be with
Above-mentioned term concrete meaning in the present invention is understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature its " going up " or it " under "
The first and second feature directly contacts can be included, it is also possible to be not directly contact including the first and second features but by it
Between other characterisation contact.And, fisrt feature second feature " on ", " top " and " above " include that first is special
Levy directly over second feature and oblique upper, or fisrt feature level height is merely representative of higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and it is " following " including fisrt feature directly over second feature and oblique upper, or be merely representative of
Fisrt feature level height is less than second feature.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the present invention.For letter
Change disclosure of the invention, hereinafter the part and setting of specific examples are described.Certainly, they are only merely illustrative, and
Purpose does not lie in the restriction present invention.Additionally, the present invention can in different examples repeat reference numerals and/or reference letter, this
It is the relation between itself not indicating discussed various embodiments and/or arranging for purposes of simplicity and clarity to plant repetition.
Additionally, the invention provides various specific technique and material example, but those of ordinary skill in the art will be appreciated that
To the application and/or the use of other materials of other techniques.
Fig. 1 to Fig. 3 is referred to, the head 10 for bladeless fan of better embodiment of the present invention includes central cavity 12
And multiple air channel cavitys 14.Central cavity 12 can house high pressure draught.Multiple air channel cavitys 14 are connected with central cavity 12 and edge
The circumferencial direction distribution of central cavity 12, air channel cavity 14 stretch out from central cavity 12.Each air channel cavity 14 includes
One wind path wall 14a and the second wind path wall 14b, the first wind path wall 14a are formed with the along the direction away from the second wind path wall 14b is recessed
One arcwall face 14c, the second wind path wall 14b are formed with the second arcwall face 14d along the direction away from the first wind path wall 14a is recessed, the
One arcwall face 14c is formed with first end 14e and the second end 14f relative with first end 14e with the second arcwall face 14d intersections,
First end 14e is closed.Each air channel cavity 14 is formed through the first wind path wall 14a and the second wind path wall at the second end 14f
The nozzle 14g of 14b.
The head 10 for bladeless fan of better embodiment of the present invention is multiple along central cavity 12 due to being formed with
The air channel cavity 14 of circumferencial direction distribution, can produce the wind of more large radiation scope.
Specifically, central cavity 12 is in hollow cylindrical shape substantially, can house high pressure draught in central cavity 12.
Specifically, the substantially rectangular shape of air channel cavity 14, multiple air channel cavitys 14 in centered on central cavity 12 to four
The floral leaf formula arrangement of week scattering, wherein, multiple air channel cavitys 14 are angularly arranged.Air channel cavity 14 connect with central cavity 12 with
The high pressure draught in central cavity 12 is flowed in air channel cavity 14.
Fig. 4 is referred to, specifically, nozzle 14g is opened in the front end of air channel cavity 14, and nozzle 14g is slot-shaped in strip.Receive
The high pressure draught being dissolved in air channel cavity 14 can outwards spray from nozzle 14g and roll up the air around inhaling and form wind.Multiple nozzles
14g arranges in the floral leaf formula to surrounding scattering centered on central cavity 12.
Fig. 5 is referred to, in the present embodiment, when being used with normal attitude for the head 10 of bladeless fan, center cavity
12 user oriented one end of body inwardly concaves and is formed with conical guide face 120.
Thus, the high pressure draught entered in central cavity 12 flows to each wind through the water conservancy diversion of conical guide face 120
In road cavity 14.
In the present embodiment, air channel cavity 14 be in aerofoil profile, each air channel cavity 14 along central cavity 12 radially outward
Extend.
Thus, the air-out radiation scope of head 10 is wider.
Fig. 6 is referred to, in the present embodiment, multiple air channel cavitys 14 are angularly distributed.Preferably, air channel cavity 14
Number is 6, and accordingly the number of nozzle 14g is also 6.Quantity of the radical length of air channel cavity 14 according to air channel cavity 14
It is determined that, the radical length of the number more multiple duct cavity 14 of air channel cavity 14 is shorter, otherwise longer.It is appreciated that air channel cavity
14 number is not limited to present embodiment, can make a change depending on demand in other embodiments.
Thus, the scope for the wind of the generation of head 10 of bladeless fan is wider, air quantity and wind speed are larger, and air-out is uniform.
The head 10 of bladeless fan as shown in Figure 6 along the section of VI-VI, wherein, the longitudinal section of central cavity 12 is basic
Rounded, the longitudinal section of air channel cavity 14 is substantially rectangular.
The cross section of air channel cavity 14 is in the wide ellipse in the narrow centre in two substantially, is closed, second at first end 14e
The nozzle 14g of the first wind path wall 14a and the second wind path wall 14b is formed through at the 14f of end.
Thus, more high pressure draught can be housed to increase the air quantity and wind speed of head 10 in air channel cavity 14.
In the present embodiment, the respective independent jets of multiple nozzle 14g, the width range of nozzle 14g is 1mm~5mm.It is excellent
Selection of land, the width range of nozzle 14g is 1mm~1.5mm.
So, it is ensured that 10 energy air-out effect of head is good.
In the present embodiment, each air channel cavity 14 includes that at least two radially arrange at the second end 14f
And it is spaced apart the distance piece 140 of the first wind path wall 14a and the second wind path wall 14b.Preferably, each air channel cavity 14 is provided with
The number of distance piece 140 is 5, and distance piece 140 is equidistantly distributed, and is provided with the nozzle 14g of distance piece 140 in grid-like.Spray
The inner surface of mouth 14g is connected with the first arcwall face 14c with the second arcwall face 14d, the wall without the need for guiding is provided with nozzle 14g again
Face, air directly from injection in nozzle 14g can reduce gas-flow resistance so as to reduce the noise of head 10.
Thus, distance piece 140 enables 10 uniform air-out of head, and increase the wind speed of head 10.
In the present embodiment, in the circumferential cross-section of head 10, the first arcwall face 14c be the first camber line, the second arc
Face 14d is the second camber line, and first end 14e is first end point, and the second end 14f is the second end points, and first end point is double-pointed with the
The angle of line and the first camber line is 10 °~35 °.Preferably, first end point and double-pointed line and the folder of the first camber line
Angle is 21 °.
Thus, by regulating and controlling the radian of the first arcwall face 14c and the second arcwall face 14d to ensure the wind speed and wind of head 10
The noise of head 10 is reduced while amount.
Specifically, the central cavity 12 of head 10 is communicated with the first ventilation duct 18 to be passed through high pressure draught.Alternatively, first
Ventilation duct 18 includes bending pipe portion and vertical pipe portion.The rear end of one end and the central cavity 12 of bending pipe portion dorsad user connects,
The other end of bending pipe portion is connected with vertical pipe portion.Alternatively, the first ventilation duct 18 be in vertical tubulose and with 12 bottom of central cavity
Portion connects.
Thus, the first ventilation duct 18 includes the part vertically placed to coordinate the head 10 realized for bladeless fan all the time
Pitching motion.
According to the bladeless fan 100 of better embodiment of the present invention, including dynamical system and any of the above-described embodiment
For the head 10 of bladeless fan.Dynamical system is used to produce high pressure draught.Head 10 is connected with dynamical system, for receiving simultaneously
High pressure draught is sprayed by nozzle.
Fig. 7 to Fig. 9 is referred to, in the present embodiment, bladeless fan 100 is also included for producing the cylinder of high pressure draught
Shape pedestal 102 and the second ventilation duct 104.The connection of second ventilation duct 104 pedestal 102 and head 10, the second ventilation duct 104 and head
10 and pedestal 102 is connected by hollow spherical hinge 106 so that head 10 can pitch rotation.Wherein, contain by leaf in pedestal 102
Wheel, the motor apparatus for driving impeller generation high pressure draught and the dynamical system for guiding the diffuser of high pressure draught to constitute
System.
Specifically, the second ventilation duct 104 is connected by hollow spherical hinge 106 with the first ventilation duct 18.Hollow spherical hinge 106
It is tightly connected with the second ventilation duct 104, hollow spherical hinge 106 is included perpendicular to the first ventilation duct 18 and the second ventilation duct 104
The rotating shaft 108 of axial direction is so that head 10 108 rotations can realize pitching motion around the shaft.Hollow spherical hinge 106 includes interior hollow ball
Hinge 106a and external hollow spherical hinge 106b, interior hollow spherical hinge 106a are socketed in external hollow spherical hinge 106b, and rotating shaft 108 connects
Interior hollow spherical hinge 106a and external hollow spherical hinge 106b is met, interior hollow spherical hinge 106a is fixedly connected with the first ventilation duct 18,
Interior hollow spherical hinge 106a is formed with the chamber connected with the second ventilation duct 104 with the first ventilation duct 18 with external hollow spherical hinge 106b
Body.
The bladeless fan 100 of better embodiment of the present invention possesses the dual-use function enjoyed the cool with drying, due to head 10
Air channel cavity 14 is arranged in floral leaf formula, can produce the wind of more large radiation scope, enjoy the cool and drying effect is good, good looking appearance.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically enforcement
The description of mode ", " example ", " specific example ", or " some examples " etc. mean with reference to embodiment or example describe it is concrete
Feature, structure, material or feature are contained at least one embodiment or example of the present invention.In this manual, it is right
The schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, knot
Structure, material or feature can be combined in one or more any embodiment or example in an appropriate manner.
While embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that:
These embodiments can be carried out in the case of principle and objective without departing from the present invention with various changes, modification, replacement and become
Type, the scope of the present invention are limited by claim and its equivalent.
Claims (9)
1. a kind of head for bladeless fan, it is characterised in that include:
The central cavity of high pressure draught can be housed;And
Connect with the central cavity and along the central cavity circumferencial direction be distributed multiple air channel cavitys, the air channel chamber
Body stretches out from the central cavity, and each described air channel cavity includes:
First wind path wall and the second wind path wall, first wind path wall are formed with along the direction away from second wind path wall is recessed
First arcwall face, second wind path wall are formed with the second arcwall face along the direction away from first wind path wall is recessed, described
First arcwall face and the second arcwall face intersection are formed with first end and second end relative with the first end, and described
Close one end;
Each described air channel cavity is formed through first wind path wall and second wind path wall at second end
Nozzle;
Each described air channel cavity includes that at least two radially arrange at second end and are spaced apart described first
The distance piece of wind path wall and second wind path wall.
2. the head for bladeless fan according to claim 1, it is characterised in that the central cavity inwardly concaves shape
Into there is conical guide face.
3. the head for bladeless fan according to claim 1, it is characterised in that the air channel cavity is in aerofoil profile, often
Individual air channel cavity the extending radially outwardly along the central cavity.
4. the head for bladeless fan according to claim 3, it is characterised in that the plurality of air channel cavity is angularly
Distribution.
5. the head for bladeless fan according to claim 1, it is characterised in that the width of the nozzle be 1mm~
5mm。
6. the head for bladeless fan according to claim 1, it is characterised in that the width of the nozzle be 1mm~
1.5mm。
7. the head for bladeless fan according to claim 1, it is characterised in that in the circumferential cross-section of the head
In, first arcwall face be the first camber line, second arcwall face be the second camber line, the first end be first end point, institute
The second end is stated for the second end points, the first end point is 10 ° with the angle of first camber line with the double-pointed line
~35 °.
8. a kind of bladeless fan, it is characterised in that include:
Dynamical system, for producing high pressure draught;And
The head for bladeless fan as described in claim 1~7 any one;The head is connected with the dynamical system
Connect, for receiving and spraying the high pressure draught by the nozzle.
9. bladeless fan according to claim 8, it is characterised in that the bladeless fan also includes that pedestal and connection are described
The ventilation duct of pedestal and the head, the ventilation duct and the head and the pedestal are by hollow ball chain connection so that institute
Stating head can pitch rotation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201510152123.1A CN104763689B (en) | 2015-03-31 | 2015-03-31 | Machine head for bladeless fan and bladeless fan with the machine head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201510152123.1A CN104763689B (en) | 2015-03-31 | 2015-03-31 | Machine head for bladeless fan and bladeless fan with the machine head |
Publications (2)
Publication Number | Publication Date |
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CN104763689A CN104763689A (en) | 2015-07-08 |
CN104763689B true CN104763689B (en) | 2017-03-22 |
Family
ID=53645710
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CN201510152123.1A Active CN104763689B (en) | 2015-03-31 | 2015-03-31 | Machine head for bladeless fan and bladeless fan with the machine head |
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CN (1) | CN104763689B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2018035704A (en) * | 2016-08-30 | 2018-03-08 | パナソニックIpマネジメント株式会社 | Air blower and air blower with air cleaning function |
JP6954096B2 (en) * | 2017-12-22 | 2021-10-27 | パナソニックIpマネジメント株式会社 | Blower and blower with air purifying function |
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CN102465932A (en) * | 2010-11-02 | 2012-05-23 | 戴森技术有限公司 | A fan assembly |
CN102808808A (en) * | 2011-06-02 | 2012-12-05 | 任文华 | Bladeless fan |
JP2013053528A (en) * | 2011-09-01 | 2013-03-21 | Panasonic Corp | Blowing device |
CN203067316U (en) * | 2012-12-07 | 2013-07-17 | 重庆市才诗科技发展中心 | Air storage pipe type ceiling fan without fan blade |
CN104061191A (en) * | 2013-03-18 | 2014-09-24 | 合肥科盛微电子科技有限公司 | Bladeless fan design method |
CN104358717A (en) * | 2014-11-07 | 2015-02-18 | 深圳市神州微动力科技有限公司 | Air compression type bladeless fan and airflow generating method of air compression type bladeless fan |
CN204532993U (en) * | 2015-03-31 | 2015-08-05 | 广东美的环境电器制造有限公司 | For without blade fan head and have described head without blade fan |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI433994B (en) * | 2011-01-25 | 2014-04-11 | Delta Electronics Inc | Fan assembly |
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2015
- 2015-03-31 CN CN201510152123.1A patent/CN104763689B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102465932A (en) * | 2010-11-02 | 2012-05-23 | 戴森技术有限公司 | A fan assembly |
CN102808808A (en) * | 2011-06-02 | 2012-12-05 | 任文华 | Bladeless fan |
JP2013053528A (en) * | 2011-09-01 | 2013-03-21 | Panasonic Corp | Blowing device |
CN203067316U (en) * | 2012-12-07 | 2013-07-17 | 重庆市才诗科技发展中心 | Air storage pipe type ceiling fan without fan blade |
CN104061191A (en) * | 2013-03-18 | 2014-09-24 | 合肥科盛微电子科技有限公司 | Bladeless fan design method |
CN104358717A (en) * | 2014-11-07 | 2015-02-18 | 深圳市神州微动力科技有限公司 | Air compression type bladeless fan and airflow generating method of air compression type bladeless fan |
CN204532993U (en) * | 2015-03-31 | 2015-08-05 | 广东美的环境电器制造有限公司 | For without blade fan head and have described head without blade fan |
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CN104763689A (en) | 2015-07-08 |
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