CN104088812B - Axial-flow fan - Google Patents
Axial-flow fan Download PDFInfo
- Publication number
- CN104088812B CN104088812B CN201310110298.7A CN201310110298A CN104088812B CN 104088812 B CN104088812 B CN 104088812B CN 201310110298 A CN201310110298 A CN 201310110298A CN 104088812 B CN104088812 B CN 104088812B
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- CN
- China
- Prior art keywords
- blade
- fan
- root
- body structure
- lamellar body
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
- A47L5/36—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back
- A47L5/362—Suction cleaners with hose between nozzle and casing; Suction cleaners for fixing on staircases; Suction cleaners for carrying on the back of the horizontal type, e.g. canister or sledge type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
Abstract
The invention discloses an axial-flow fan which comprises a plurality of blades which are circumferentially arranged apart and a rotary shaft part which is configured in the rotary center of the blades and provided with a shaft hole used for mounting a motor shaft, wherein connecting piece body structures which are used for connecting the root parts of the blades to the rotary shaft part and are connected with one another are arranged at the root parts of the blades; each connecting piece body structure is in a V shape distorted from the air suction side to the air blowing side of the fan, the V-shaped opening part faces to the air blowing side, and the extension line of the V ridge part of the V shape passes through the shaft center of the rotary shaft part and the root part of the front edge of each blade; the blades, the connecting piece body structures and the rotary shaft part are integrated. Therefore, the strength of the connecting piece body structures and the whole fan connecting part is enhanced and the air discharge effect of the central region of the fan is improved.
Description
Technical field
The present invention relates to aerofoil fan, more specifically, being a kind of aerofoil fan without hub-type.
Background technology
Refer to Fig. 1 and Fig. 2, Fig. 1 and Fig. 2 depict a kind of traditional axial flow fan structure, the aerofoil fan substantially by
Two parts composition, fan blade 1 and fan hub 2, fan blade 1 is arranged at an angle the side of wheel hub 2 with mode
Face, the center of wheel hub 2 is that motor installs axis hole 3.Wheel hub 2 is generally pylindrical, and its volume is larger, and materials'use amount is high, its diameter
It is referred to as hub ratio with the ratio of outer diameter fan, general value is 0.3 to 0.4 or so.It is limited by conventional axial-flow fan structure design
Limit and fan intensity is required, wheel hub 2 is always indispensable in aerofoil fan (being especially molded aerofoil fan) design
A part.Because the diameter of fan hub 2 is too small, blade can be caused to install, and root of blade intensity can not meet operation and want
Ask, easily rupture.But this conventional aerofoil fan, in rotating operation, wheel hub is not air-out, and hub diameter is got over
Greatly, the uniformity and air output of the air-out of fan entirety are all also bigger by being affected.And due to the presence of wheel hub so that wind
The overall materials of fan and weight are greatly increased, and not only make fan rotation need to consume more energy, and make the fan
Cost also greatly improve.
For this purpose, in the patents such as CN201391482, a kind of fan without hub-type is inventors herein proposed, the fan is by wind
Fan leaf with the aerofoil shape connecting portion formed by blade airfoil continuous transition by being connected so that one between each fan blade
Shaping.This fan for cancelling wheel hub, not only increases effective wind outlet area of whole fan so that air-out efficiency is greatly improved,
Reduce the materials of product using unitary design simultaneously, reduce cost of manufacture.
However, mention in the patent fan but there is a problem of it is as follows：
First：Connecting portion between each blade is designed to from blade to postpone being blown for accompanying rotation of being formed
Connecting portion be the thin-walled shape wing planar structure seamlessly transitted from blade airfoil, high speed rotate when blade easily shake, shadow
The stability of fan running is rung, and the air drag that blade is born can be bigger, and its connecting portion has the wind that stress is easily snapped off
Danger,.
And in order to consider ease when making mould and the conveniency when fan stacks amplifier, connecting portion
Middle part increases plane transition, more exacerbates the risk that connecting portion fractures.
Second：Because blade and connecting portion are integrally formed thin wall profile, connecting portion is relatively flat transition,
Projected area of the centre connecting portion in plane vertically with fan axis does not have great reduction, the negative effect brought
Fruit be the air-out efficiency of the impact to central wind, i.e. connecting portion compared with traditional aerofoil fan, lifted little.
Therefore, for the aerofoil fan of above-mentioned unitary design, it is necessary to a kind of new improvement project is proposed, to overcome
The problem that the aerofoil fan is present.
The content of the invention
In view of this, the present invention proposes a kind of axle stream wind without wheel hub that can improve connecting portion intensity of structure optimization
Fan.
A kind of aerofoil fan that purpose of the invention is proposed, including：
Multiple blades, it is provided separately in the circumferential；Rotation axle portion, it is configured in the pivot of above-mentioned multiple blades,
With for installing the axis hole of motor shaft；Wherein, the root position of each blade is provided with and for root of blade to be connected to rotation axle portion
The connection lamellar body structure for going up and being connected with each other, the connection lamellar body structure of each blade is from fan air draught side toward the distortion of blowing side
V-arrangement, V-arrangement opening connects lamellar body structure forming V-shape towards fan blowing side, makes fan by the connected shape of multiple connection lamellar body structures
Into connecting portion it is less in the projection in the plane of rotation axis；
The blade has：Positioned at the leading edge of direction of rotation side, and positioned at the trailing edge of direction of rotation opposition side, the first blade
Leading edge root forms V spines with the line in axle center；The axle center and blade inlet edge of the extension line of the V spines by rotation axle portion
Root；Multiple blades, connection lamellar body structure and rotation axle portion are integrally formed.
Preferably, the connection of the connection lamellar body structure and corresponding root of blade is the transition of discontinuous tangent line.
Preferably, the root of the above-mentioned leading edge of the first blade in above-mentioned blade, and rotation axle portion and with above-mentioned first
The root connection of the above-mentioned trailing edge of the second adjacent blade of blade, the connection lamellar body structure is formed as：With blade inlet edge
Root is close to rotation axle portion, and the connection lamellar body structure is simultaneously prolonged to the first trailing edge root and the second trailing edge root
Stretch.
Preferably, from leading edge, backward edge gradually successively decreases the thickness of each blade.
Preferably, the blade includes thickness rib, and the thickness rib is located at the blade inlet edge and the company
The upside of the junction of contact pin body structure.
Preferably, the described number of blade is 2-3 pieces.
Preferably, when the described number of blade is 2, the line of two blade inlet edge roots passes through the axle center of rotation axle portion.
Above-mentioned aerofoil fan, compared with prior art, with following technical advantage：
First：First blade inlet edge root of fan, and rotation axle portion and second leaf adjacent with above-mentioned first blade
The above-mentioned trailing edge root connection of piece, above-mentioned connecting portion is formed as：With blade inlet edge root to rotation axle portion it is close, the company
Contact pin body structure simultaneously extends to the first trailing edge root and the second trailing edge root, and the connection lamellar body structure is by fan
The V-arrangement that air draught side distorts toward blowing side, the first blade inlet edge root forms the V spines with the line in axle center.Enhance and rotation
The connection of shaft.The intensity of fan connecting part has very big lifting.
Second：The connection lamellar body structure forming V-shape of transitional function is played to each fan blade, fan is made by multiple connections
The connecting portion that lamellar body structure is connected to form is less in the projection in the plane of rotation axis, reduces fan center region
Closure area, improve the air output and air-out efficiency of whole fan.
3rd：By each fan blade design into the thin structure of leading edge thickness trailing edge so that fan, can when high speed rotates
Ensure the stability of blade, so as to improve the utilization rate of electrical of fan, while making connecting portion further obtain with the intensity of blade
To lifting.
4th：On the premise of based on second point advantage, connecting portion is designed to into discontinuous cutting with the junction of fan blade
The transition of line, makes the connection lamellar body structure of each root of blade V-shaped, on the premise of bonding strength, reduces the use of connecting portion
Material, reduces the cost of manufacture of fan.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the top view of existing aerofoil fan；
Fig. 2 is the side view of existing aerofoil fan；
Fig. 3 is the top view of aerofoil fan of the present invention；
Fig. 4 is the side view of the A directions of arrow in Fig. 3；
Fig. 5 is the side view of the B directions of arrow in Fig. 3；
Fig. 6 is the wind speed profile figure of the aerofoil fan with aerofoil fan of the prior art of the present invention.
Specific embodiment
Just as known from prior art, in existing aerofoil fan, for the aerofoil fan for having hub type, wheel hub by
Affected by wheel hub size in no air-out effect, therefore its air-out efficiency, and the materials of wheel hub also improve axle stream wind
The production cost of fan.For the improvement to this kind of fan, the design of wheel hub is eliminated, it is proposed that a kind of integrally formed axle stream wind
Fan.But the existing aerofoil fan without hub-type, because its junction and the connecting portion in the middle of fan blade are flat from blade
The thin-walled shape airfoil structure for crossing is slipped over, due to cancelling wheel hub so that connecting portion is with the less bonding strength for rotating axle portion significantly
Decline, the thin wing of this fan is designed and causes fan easily to occur shake in rotary course, increased stress and fracture risk.And
And due to continuous wing planar structure, the air-out effect of fan center position is limited.
Therefore, the present invention has made improvement to the existing fan without hub type, it is proposed that a kind of new aerofoil fan.Should
Aerofoil fan includes 2 blades, and it is provided separately in the circumferential；Rotation axle portion, it is configured in the rotation of above-mentioned 2 blades
The heart, with for installing the axis hole of motor shaft；Wherein, the root position of each blade is provided with and for root of blade to be connected to rotation
On shaft and the connection lamellar body structure that is connected with each other, the connection lamellar body structure of each blade is from fan air draught side toward blowing
The V-arrangement of wind side distortion, V-arrangement opening portion is formed at blowing side, and the extension line of the V spines of the V-arrangement passes through the axle center of rotation axle portion
And the root of blade inlet edge, described multiple blades, connection lamellar body structure and rotation axle portion are integrally formed.
Each blade has：It is front positioned at the leading edge 221 of direction of rotation side, and positioned at the trailing edge 222 of direction of rotation opposition side
Edge 221 has the arc curve to direction of rotation indent, and trailing edge 222 has the cambered outwards arc of negative side to direction of rotation bent
Line；The root of the above-mentioned leading edge 221 of the first blade in above-mentioned blade, and rotation axle portion and adjacent with above-mentioned first blade
The root connection of the above-mentioned trailing edge 222 of the second blade, the connection lamellar body structure is formed as：With the root of blade inlet edge 221
It is close to rotation axle portion, it is described to connect lamellar body structure 21 and to the root of the first trailing edge 222 and the second trailing edge 222
Portion extends, described to connect the V-arrangement that lamellar body structure 21 is distorted from fan air draught side toward blowing side, the first blade inlet edge root and axle center
Line formed V-arrangement V spines 212.It is to be herein pointed out connecting drawing for lamellar body structure 21 for different fan blade
Point, it is to be divided on variation tendency identical direction according to the shape of connection lamellar body structure.And so-called connection lamellar body knot
The V-arrangement of structure, takes from from blade inlet edge root to two intersecting extended surfaces that rotation axle portion extends the general shape to be formed of having a common boundary.
I.e. in the side of the V spines 212, connect lamellar body structure and the variation tendency distorted toward blowing side is presented, in the another of V spines 212
Side, connects lamellar body structure and the variation tendency distorted toward blowing side is equally presented.But as the bisector on geometric meaning, also may be used
Being divided with the center line of whole aerofoil fan, consequently, it is possible to defining for connecting portion, then be by several residing for it
Depending on what position.
Connection lamellar body structure 21 is designed to into the V-arrangement toward the distortion of blowing side, so, the first blade in above-mentioned blade
Above-mentioned leading edge root, and rotation axle portion and second blade adjacent with above-mentioned first blade above-mentioned trailing edge root connect
Connect, the intensity of the connecting portion of fan connection lamellar body structure and its connected whole fan has very big lifting, while connecting lamellar body knot
V-arrangement is constituted, makes fan in the connecting portion being connected to form by multiple connection lamellar body structures in the plane of rotation axis
Projection is less, reduces the closure area in fan center region, improves the air output and air-out efficiency of whole fan, compares
Originally from the smooth continuous design of blade, the connection lamellar body structure 21 of this structure has higher air-out efficiency.
Further, design blade 22 when, by the thickness of each blade 22 from leading edge 221 to trailing edge 222 gradually
Successively decrease.I.e. leading edge 221 is the most thick part of whole blade 22, and trailing edge 222 is then the most thin part of completeblade 22.So set
Meter, so as to strengthen the stability of fan running.
Further, the junction of connection lamellar body structure 21 and corresponding blade 22 is the transition formation V of discontinuous tangent line
Shape, in the case of equality strength, it is possible to make material more reduce.
The thickness of leading edge 221 from be connected the intersection of lamellar body structure 21 and successively decrease to tip successively.Before each fan blade
Edge be a blunt curved surface, the centre of the blunt curved surface to both sides dimpling, to reduce windage.
Axis hole 23 is provided with the axis of rotation of whole fan, the axis hole 23 is that fan is attached on motor.Should
Rotation axle portion protrudes from connection lamellar body structure 21, motor axle portion is matched somebody with somebody with the axis hole interference of fan rotation axis portion by snap-in structure
Close.Fig. 6 is referred to, Fig. 6 is the wind speed profile figure of the aerofoil fan with aerofoil fan of the prior art of the present invention.As schemed
Show, wherein Fig. 6 A are the wind speed profile figure of the aerofoil fan of the present invention, it can clearly be seen that in the present invention, the central part of fan
The area in Wei Difeng areas is less, and its air-out effect will be substantially better than the air-out effect of the fan of the prior art in Fig. 6 B.
In sum, the connection lamellar body structure of aerofoil fan proposed by the present invention, just each blade is designed to along air draught
Side improves the intensity of connection lamellar body structure and intensity and the air-out of whole fan connecting part toward the v-shaped structure of blowing side distortion
Effect, in addition in the present invention, the comparison that the leading edge of fan blade is designed is thick, according to the bionic principle of dragonfly, can subtract
Shake in few fan rotation, reduces the noise in fan motion.And be designed to connecting portion and the junction of fan blade non-
The transition of continuous tangent line, that is, ensure that the bond strength of junction, and the materials of aerofoil fan are reduced again, reduce the axle stream wind
The cost of manufacture of fan.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (7)
1. a kind of aerofoil fan, it is characterised in that include：
Multiple blades, it is provided separately in the circumferential；Rotation axle portion, it is configured in the pivot of above-mentioned multiple blades, has
For installing the axis hole of motor shaft；Wherein, the root position of each blade is provided with and root of blade is connected in rotation axle portion simultaneously
The connection lamellar body structure being connected with each other, the connection lamellar body structure of each blade is the V-arrangement from fan air draught side toward the distortion of blowing side,
V-arrangement opening connects lamellar body structure forming V-shape towards fan blowing side, makes fan connect what lamellar body structures were connected to form by multiple
Connecting portion is less in the projection in the plane of rotation axis；
The blade has：Positioned at the leading edge of direction of rotation side, and positioned at the trailing edge of direction of rotation opposition side, the first blade inlet edge
Root forms V spines with the line in axle center；The extension line of the V spines is by the axle center of rotation axle portion and the root of blade inlet edge
Portion；Multiple blades, connection lamellar body structure and rotation axle portion are integrally formed.
2. aerofoil fan according to claim 1, it is characterised in that the root of blade of each blade and its described connection sheet
The connection of body structure is the transition of discontinuous tangent line.
3. aerofoil fan according to claim 1, it is characterised in that the above-mentioned leading edge of the first blade in above-mentioned blade
Root, and the root connection of the above-mentioned trailing edge of rotation axle portion and second blade adjacent with above-mentioned first blade, the connection
Lamellar body structure is formed as：With the root of blade inlet edge it is close to rotation axle portion, the connection lamellar body structure and to the first blade
Trailing edge root and the second trailing edge root extend.
4. aerofoil fan as claimed in claim 3, it is characterised in that：Backward edge is gradually from leading edge for the thickness of each blade
Successively decrease.
5. aerofoil fan as claimed in claim 3, it is characterised in that：The blade includes thickness rib, and the thickness adds
Strong portion is located at the upside of the blade inlet edge and the junction of the connection lamellar body structure.
6. aerofoil fan as claimed in claim 1, it is characterised in that the described number of blade is 2-3 pieces.
7. aerofoil fan as claimed in claim 6, it is characterised in that when the described number of blade is 2, two blade inlet edge roots
The axle center that the line in portion passes through rotation axle portion.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310110298.7A CN104088812B (en) | 2013-04-01 | 2013-04-01 | Axial-flow fan |
| KR1020140038807A KR102171874B1 (en) | 2013-04-01 | 2014-04-01 | Cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310110298.7A CN104088812B (en) | 2013-04-01 | 2013-04-01 | Axial-flow fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104088812A CN104088812A (en) | 2014-10-08 |
| CN104088812B true CN104088812B (en) | 2017-05-17 |
Family
ID=51636556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310110298.7A Active CN104088812B (en) | 2013-04-01 | 2013-04-01 | Axial-flow fan |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR102171874B1 (en) |
| CN (1) | CN104088812B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2015413794B2 (en) * | 2015-11-02 | 2019-05-09 | Mitsubishi Electric Corporation | Fan, outdoor unit, and refrigeration cycle apparatus |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6383496U (en) * | 1986-11-19 | 1988-06-01 | ||
| US6702552B1 (en) * | 1999-11-25 | 2004-03-09 | Jayden David Harman | Impeller having blade(s) conforming to the golden section of a logarithmic curve |
| JP3801855B2 (en) | 2000-11-07 | 2006-07-26 | 株式会社日立製作所 | Electric blower and vacuum cleaner provided with the same |
| US6719541B2 (en) | 2002-04-30 | 2004-04-13 | Northland/Scott Fetzer Company | Fan assembly with application to vacuum cleaners |
| JP4467952B2 (en) * | 2003-11-10 | 2010-05-26 | 東芝キヤリア株式会社 | Propeller fan, outdoor unit for air conditioner using this |
| JP5600877B2 (en) * | 2009-02-06 | 2014-10-08 | パナソニック株式会社 | Electric blower |
| JP4798640B2 (en) * | 2009-09-11 | 2011-10-19 | シャープ株式会社 | Propeller fan, molding die and fluid feeder |
| JP2011080427A (en) | 2009-10-08 | 2011-04-21 | Panasonic Corp | Electric blower and vacuum cleaner using the same |
| US20120186036A1 (en) | 2011-01-25 | 2012-07-26 | Kegg Steven W | Diffuser for a vacuum cleaner motor-fan assembly |
| CN202091255U (en) * | 2011-06-14 | 2011-12-28 | 珠海格力电器股份有限公司 | Axial fan |
| KR102017918B1 (en) | 2011-10-13 | 2019-09-03 | 악티에볼라겟 엘렉트로룩스 | Vacuum cleaner |
-
2013
- 2013-04-01 CN CN201310110298.7A patent/CN104088812B/en active Active
-
2014
- 2014-04-01 KR KR1020140038807A patent/KR102171874B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CN104088812A (en) | 2014-10-08 |
| KR20140119660A (en) | 2014-10-10 |
| KR102171874B1 (en) | 2020-10-29 |
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