CN203023122U - Electric fan blade - Google Patents
Electric fan blade Download PDFInfo
- Publication number
- CN203023122U CN203023122U CN 201220721848 CN201220721848U CN203023122U CN 203023122 U CN203023122 U CN 203023122U CN 201220721848 CN201220721848 CN 201220721848 CN 201220721848 U CN201220721848 U CN 201220721848U CN 203023122 U CN203023122 U CN 203023122U
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- blade
- straight line
- wheel hub
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- point
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Abstract
The utility model discloses an electric fan blade which comprises a cylindrical hub and more than one vanes, wherein the radius of the cylindrical surface of the hub is r; the connecting line of the middle points of wing chords of the vanes is a curve L1; the connecting line between the middle point of a vane root wing chord of each vane and the central point o of the hub is a straight line L2; the connecting line between the middle point of the wing chord of a circle, which is sectioned by the vanes, is concentric with but different from the hub and has a radius of R, and the central point o of the hub is a straight line L3; an included angle A1 between the straight line L2 and the straight line L3 is named as a vane net bending angle; the connecting line between the first intersection point a intersected by the cylindrical surface with a radius of R and the edge of the vane and the central point o of the hub is set as a straight line L4; a tangent line of the edge of the vane taking the first intersection point as a tangent point is a straight line L5; an included angle A2 between the straight line L4 and the straight line L5 is named as a guide margin bending angle; and an included angle Q between the rotating plane of the blade and the wing chord of a circle, which is sectioned by the vanes, is concentric with but different from the hub and has a radius of R, is named as a vane installing angle. According to the electric fan blade disclosed by the utility model, through preferable A1, A2 and Q values, the purposes of improving the air quantity and the air speed and reducing the noise are achieved.
Description
Technical field
The utility model relates to a kind of fan blade, particularly a kind of electric fan blade with five blades and circular hub one.
Background technique
On at present domestic and international household electrical appliances market, common stand fan rotating speed is commonly 1100-1300rpm, and air quantity is commonly 50-65m
3/ min keeps when improving air quantity that energy consumption is constant or to reduce energy consumption be the industry target always.Air quantity and noise are one of electric fan main performance index, especially under certain conditions require that air quantity is large and noise is low, and the size of the selection of the clean bending angle of blade, guide margin bending angle noise when directly affecting fan work, blade angle plays a major role to the gas compression performance, and existing fan is when selecting these parameters, all fail to accomplish the coupling of optimal parameter so that fail to reach best air quantity during fan work and noise large.
The model utility content
In order to overcome the deficiencies in the prior art, the utility model provides a kind of electric fan blade simple in structure, reasonable in design, and its air quantity is large, noise is little, and the utility model realizes that the technological scheme that above-mentioned purpose adopts is:
A kind of electric fan blade comprises cylindrical bosses and a slice with upper blade, and described blade extends radially outward from wheel hub, and the blade root of described blade is arranged on the cylndrical surface of described wheel hub;
The cylndrical surface radius of described wheel hub is r; If the cylndrical surface radius concentric with the wheel hub cylndrical surface is R; The line of each wing chord mid point of described blade is curve L1; The line of the blade root wing chord mid point of described blade and wheel hub central point o is straight line L2; The line of the wing chord mid point of the different circles that blade cut is concentric from wheel hub, radius is R and wheel hub central point o is straight line L3;
Included angle A 1 between described straight line L2 and straight line L 3 is called the clean bending angle of blade;
If the first point of intersection a that described radius is the cylndrical surface of R and described blade edge to intersect and the line of wheel hub central point o are straight line L4;
Tangent line take described the first point of intersection as the described blade edge at point of contact is straight line L5;
The included angle A 2 of described straight line L4 and described straight line L5 is called the guide margin bending angle;
The angle Q of the wing chord of the different circles that the plane of rotation of described fan blade is concentric from described blade cut and wheel hub, radius is R is called blade angle;
When r/R equals 0.3 ± 0.04,0.4 ± 0.04,0.5 ± 0.04,0.6 ± 0.04,0.7 ± 0.04,0.8 ± 0.04,0.9 ± 0.04,1.0 o'clock, the clean bending angle A1 of blade should be 12 °～15 ° mutually, 7 °～10 °, 3 °～6 °, 1 °～3 °, 1 °～3 °, 0 °～1 ° ,-0.5 °～1 ° ,-0.5 °～0.5 °;
Guide margin bending angle A2 should be 47 °～50 ° mutually, and 29 °～32 °, 24 °～27 °, 22 °～25 °, 22 °～25 °, 22 °～25 °, 21 °～24 °, 21 °～24 °;
Blade angle Q should be 11 °～14 ° mutually, and 17 °～20 °, 18 °～21 °, 18 °～21 °, 18 °～21 °, 18 °～21 °, 18 °～21 °, 18 °～21 °.
More preferably, when r/R equals 0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0 o'clock,
The clean bending angle A1 of blade should be 13.87 ° mutually, and 8.31 °, 4.29 °, 2.12 °, 1.84 °, 0.31 ° ,-0.06 °, 0 °.
More preferably, when r/R equals 0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0 o'clock, guide margin bending angle A2 should be 48.4 ° mutually, and 30.65 °, 25.34 °, 23.39 °, 23.3 °, 23.29 °, 22.74 °, 22.24 °.
More preferably, when r/R equals 0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0 o'clock, blade angle Q should be 12.36 ° mutually, and 18.58 °, 19.74 °, 19.83 °, 19.55 °, 19.23 °, 19 °, 18.86 °.
More preferably, described blade is moulding or metalwork.
More preferably, described fan blade comprises cylindrical bosses and equally distributed five blades, and described five blades and wheel hub are injected into one.
The beneficial effects of the utility model are:
Electric fan blade of the present utility model by the parameter matching of the best, makes fan can reach best air quantity due to the structure that adopts the clean bending angle of preferred blade, guide margin bending angle, blade angle when work; Improve the air-supply efficient of fan blade, and then improved the Energy Efficiency Ratio of electric fan product.
Description of drawings
Fig. 1 is the structural representation of facing of the utility model electric fan blade;
Fig. 2 is the left view of Fig. 1.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, electric fan blade of the present utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
See figures.1.and.2, electric fan blade one embodiment of the present utility model comprises that cylindrical bosses 1 and a slice are with upper blade 2, preferably, the quantity of blade 2 is five, five blades 2 all are evenly distributed on all sides of wheel hub 1, five blades 2 extend radially outward certain radius from wheel hub 1, and the blade root of blade 2 is distributed on the cylndrical surface of wheel hub 1; Wheel hub 1 is arranged on motor by attachment hole, and is connected with motor shaft;
The cylndrical surface radius of wheel hub 1 is r; If the cylndrical surface radius concentric with wheel hub 1 cylndrical surface is R, wherein, R〉r; The line of each wing chord mid point of blade is curve L1; The line of the blade root wing chord mid point of blade and wheel hub central point o is straight line L2; The line of the wing chord mid point of the different circles that blade 2 cuts are concentric from wheel hub 1, radius is R and wheel hub 1 central point o is straight line L 3; Included angle A 1 between straight line L2 and straight line L3 is called the clean bending angle of blade; If the first point of intersection a that radius is the cylndrical surface of R and described blade edge to intersect and the line of wheel hub 1 central point o are straight line L4; Tangent line take the first point of intersection a as the blade edge at point of contact is straight line L5; The included angle A 2 of straight line L4 and straight line L5 is called the guide margin bending angle; The angle Q of the wing chord of the different circles that the plane of rotation of fan blade is concentric with wheel hub 1 from blade 2 cuts, radius is R is called blade angle;
When r/R equals 0.3 ± 0.04,0.4 ± 0.04,0.5 ± 0.04,0.6 ± 0.04,0.7 ± 0.04,0.8 ± 0.04,0.9 ± 0.04,1.0 o'clock, the clean bending angle A1 of blade should be 12 °～15 ° mutually, 7 °～10 °, 3 °～6 °, 1 °～3 °, 1 °～3 °, 0 °～1 ° ,-0.5 °～1 ° ,-0.5 °～0.5 °;
Guide margin bending angle A2 should be 47 °～50 ° mutually, and 29 °～32 °, 24 °～27 °, 22 °～25 °, 22 °～25 °, 22 °～25 °, 21 °～24 °, 21 °～24 °;
Blade angle Q should be 11 °～14 ° mutually, and 17 °～20 °, 18 °～21 °, 18 °～21 °, 18 °～21 °, 18 °～21 °, 18 °～21 °, 18 °～21 °.
Preferably, as a kind of embodiment, when r/R equals 0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0 o'clock,
The clean bending angle A1 of blade should be 13.87 ° mutually, and 8.31 °, 4.29 °, 2.12 °, 1.84 °, 0.31 ° ,-0.06 °, 0 °;
Guide margin bending angle A2 should be 48.4 ° mutually, and 30.65 °, 25.34 °, 23.39 °, 23.3 °, 23.29 °, 22.74 °, 22.24 °;
Blade angle Q should be 12.36 ° mutually, and 18.58 °, 19.74 °, 19.83 °, 19.55 °, 19.23 °, 19 °, 18.86 °.
Above-mentioned blade 2 is moulding or metalwork; Preferably, five blades 2 and wheel hub 1 are injected into one.
Determine the size of noise due to the clean bending angle A1 of blade, guide margin bending angle A2, blade angle Q works to the gas compression performance and namely determines air quantity, the size of wind speed, therefore, by above-mentioned preferred A1, A2, Q value, can reach and both improve air quantity and wind speed, reduce again the purpose of noise.
The above embodiment has only expressed several mode of execution of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (6)
1. an electric fan blade, comprise that cylindrical bosses and a slice with upper blade, is characterized in that, described blade extends radially outward from wheel hub, and the blade root of described blade is arranged on the cylndrical surface of described wheel hub;
The cylndrical surface radius of described wheel hub is r; If the cylndrical surface radius concentric with the wheel hub cylndrical surface is R; The line of each wing chord mid point of described blade is curve L1; The line of the blade root wing chord mid point of described blade and wheel hub central point o is straight line L2; The line of the wing chord mid point of the different circles that blade cut is concentric from wheel hub, radius is R and wheel hub central point o is straight line L3;
Included angle A 1 between described straight line L2 and straight line L3 is called the clean bending angle of blade;
If the first point of intersection a that described radius is the cylndrical surface of R and described blade edge to intersect and the line of wheel hub central point o are straight line L4;
Tangent line take described the first point of intersection as the described blade edge at point of contact is straight line L5;
The included angle A 2 of described straight line L4 and described straight line L5 is called the guide margin bending angle;
The angle Q of the wing chord of the different circles that the plane of rotation of described fan blade is concentric from described blade cut and wheel hub, radius is R is called blade angle;
When r/R equals 0.3 ± 0.04,0.4 ± 0.04,0.5 ± 0.04,0.6 ± 0.04,0.7 ± 0.04,0.8 ± 0.04,0.9 ± 0.04,1.0 o'clock,
The clean bending angle A1 of blade should be 12 °～15 ° mutually, and 7 °～10 °, 3 °～6 °, 1 °～3 °, 1 °～3 °, 0 °～1 ° ,-0.5 °～1 ° ,-0.5 °～0.5 °;
Guide margin bending angle A2 should be 47 °～50 ° mutually, and 29 °～32 °, 24 °～27 °, 22 °～25 °, 22 °～25 °, 22 °～25 °, 21 °～24 °, 21 °～24 °;
Blade angle Q should be 11 °～14 ° mutually, and 17 °～20 °, 18 °～21 °, 18 °～21 °, 18 °～21 °, 18 °～21 °, 18 °～21 °, 18 °～21 °.
2. electric fan blade according to claim 1 is characterized in that:
When r/R equals 0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0 o'clock, the clean bending angle A1 of blade should be 13.87 ° mutually, and 8.31 °, 4.29 °, 2.12 °, 1.84 °, 0.31 ° ,-0.06 °, 0 °.
3. electric fan blade according to claim 1 is characterized in that:
When r/R equals 0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0 o'clock, guide margin bending angle A2 should be 48.4 ° mutually, and 30.65 °, 25.34 °, 23.39 °, 23.3 °, 23.29 °, 22.74 °, 22.24 °.
4. electric fan blade according to claim 1 is characterized in that:
When r/R equals 0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0 o'clock, blade angle Q should be 12.36 ° mutually, and 18.58 °, 19.74 °, 19.83 °, 19.55 °, 19.23 °, 19 °, 18.86 °.
5. any one described electric fan blade according to claim 1 to 4 is characterized in that:
Described blade is moulding or metalwork.
6. any one described electric fan blade according to claim 1 to 4 is characterized in that:
Comprise cylindrical bosses and equally distributed five blades, described five blades and wheel hub are injected into one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220721848 CN203023122U (en) | 2012-12-24 | 2012-12-24 | Electric fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220721848 CN203023122U (en) | 2012-12-24 | 2012-12-24 | Electric fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203023122U true CN203023122U (en) | 2013-06-26 |
Family
ID=48647111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220721848 Expired - Lifetime CN203023122U (en) | 2012-12-24 | 2012-12-24 | Electric fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203023122U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108980107A (en) * | 2018-08-09 | 2018-12-11 | 浙江大学 | A kind of bionical fan vane |
-
2012
- 2012-12-24 CN CN 201220721848 patent/CN203023122U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108980107A (en) * | 2018-08-09 | 2018-12-11 | 浙江大学 | A kind of bionical fan vane |
| CN108980107B (en) * | 2018-08-09 | 2024-04-12 | 浙江大学 | Bionic fan blade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |