CN203420934U - Axial flow fan and air conditioner - Google Patents
Axial flow fan and air conditioner Download PDFInfo
- Publication number
- CN203420934U CN203420934U CN201320549838.7U CN201320549838U CN203420934U CN 203420934 U CN203420934 U CN 203420934U CN 201320549838 U CN201320549838 U CN 201320549838U CN 203420934 U CN203420934 U CN 203420934U
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- axial fan
- blade
- wheel hub
- trailing edge
- fan according
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Abstract
The utility model provides an axial flow fan. By the aid of the axial flow fan, problems of loud pneumatic noise and easiness in cracking of junctions of blades and the outer edge of a hub in the prior art can be solved. The technical scheme includes that the axial flow fan comprises a hub and a plurality of blades. A pit is formed at the rear edge of each blade and faces the front edge of the blade. Compared with the prior art, the axial flow fan has the advantages that noise can be reduced by 2-3 decibels as shown by experimental determination, so that the purpose of reducing the noise of an air conditioner on the basis of increase of a blowing rate can be achieved, the strength of the fan can be improved, and the problem of easiness in cracking of junctions of the outer edge of the hub can be solved.
Description
Technical field
The utility model relates to the fan in household electric appliance, specifically, relates to a kind of architecture advances of axial flow fan for air conditioner.
Background technique
In air conditioner outdoor machine, adopt axial fan to carry out forced-convection heat transfer.Outdoor unit noise size is to evaluate the important indicator of heat pump performance, and the aerodynamic noise of axial fan is the key factor that affects outdoor unit noise.Outdoor unit generally rotates by motor driving shaft flow fan.Air flows into from the leading edge of blade, after blade place is boosted, from trailing edge, blows out.
Existing axial fan, exist following problem: 1, its blade and wheel hub outer rim intersection that imports side towards air is generally smooth smooth whole curved surface, when running up, fan is prone to cracking or damaging problem, and blade and wheel hub outer rim intersection form obvious height difference, easily produce larger noise.2, on blade, towards the trailing edge of blade rotary opposite direction, be generally lineal shape or round and smooth arc line shaped.This kind of structure be smooth air effectively, forms eddy current or turbulent flow on blade towards the trailing edge place of blade rotary opposite direction simultaneously, thereby produces larger noise.
Summary of the invention
The utility model provides a kind of axial fan, and it can solve the problem that the large and blade of aerodynamic noise that prior art exists and wheel hub outer rim intersection easily produce cracking.
In order to solve the problems of the technologies described above, the technical solution of the utility model is that a kind of axial fan, comprises wheel hub and a plurality of blade, is formed with to blade inlet edge direction and caves on each trailing edge.
Described depression is V-shaped.
Described depression is triangular in shape.
The bottom angle α scope of described triangular shaped recess is 30 °-120 °.
The depth bounds 6-17mm of described triangular shaped recess.
At each trailing edge and wheel hub intersection, be formed with projection.
Described projection outside is tangent with the outer rim of wheel hub, and described convex top is substantially concordant with the top of wheel hub, and intersect with blade described projection bottom.
Described projection is triangular hill, and triangle base is wheel hub rim, and leg-of-mutton top angle is towards trailing edge.
Described projection is hollow-core construction, and its end face is uncovered.
, include the technological scheme of above-mentioned axial fan.
Axial fan of the present utility model is designed with two place's triangular structures on each blade, specific as follows:
The first place is positioned at trailing edge and wheel hub outer rim intersection, and this three-legged structure is protruding structure, and its outside is tangent with the outer rim of wheel hub, and its top is substantially concordant with the top of wheel hub, and intersect with blade its bottom.This projection three-legged structure not only can effectively be strengthened blade and wheel hub outer rim intersection, prevent from occurring when this is in fan and runs up cracking or damaging problem, the more important thing is and can effectively prevent the vortex of air and turbulent generation, thereby steady and dredging flow, when increasing air quantity, reduced the aerodynamic noise at this place.
The second place is positioned on blade near the trailing edge of blade rotary opposite direction.This three-legged structure, from the trailing edge of blade to leading edge direction depression, is positioned near the excircle of trailing edge.This place's three-legged structure can be eliminated eddy current or the turbulent flow that air-flow forms at trailing edge, changes air-flow in the velocity distribution at this place, thereby reduces the aerodynamic noise at this place.
The utility model compared with prior art has the following advantages and good effect:
1, through measuring, show, above-mentioned two place's design improvement, with respect to prior art, reduce noise 2-3 decibel, thereby realize, have reached the object that reduces air-conditioning noise on the basis that increases air quantity.
2, improved the intensity of fan, prevented that wheel hub outer rim intersection from easily producing the problem of cracking.
Accompanying drawing explanation
Fig. 1 is a kind of axial fan plan view of the utility model;
Fig. 2 is a kind of axial fan plan view of the utility model;
Fig. 3 is a kind of axial fan stereogram of the utility model;
1, wheel hub; 1-1, wheel hub axis hole; 2, blade; 2-1, blade inlet edge; 2-2, trailing edge; 2-3, depression; 2-4, projection; 2-5 blade outward edge; α is the bottom angle of depression; Z, axial fan.
Embodiment
Below in conjunction with drawings and Examples the utility model, be described in detail.
Referring to Fig. 1, Fig. 2 and Fig. 3, in order to reduce and reduce air-flow vortex and the turbulent phenomenon at blade 2 places, on each trailing edge 2-3, be formed with to blade inlet edge 2-1 direction depression 2-3.The position of described depression 2-3 is near blade outward edge 2-5 place.In the present embodiment, 2-3 is triangular in shape for depression, and bottom angle α scope is 30 °-120 °, and in an embodiment, bottom angle α is 65 °.The depth bounds 6-17mm of depression 2-3, in an embodiment, the degree of depth of depression 2-3 is 10mm.
In order to improve the intensity of wheel hub 1 and blade 2 intersections and to reduce noise, on the blade 2 of each trailing edge 2-2 and wheel hub 1 intersection, be formed with protruding 2-4.Described protruding 2-4 outside is tangent with the outer rim of wheel hub 1, and described protruding 2-4 top is substantially concordant with the top of wheel hub 1, and described protruding 2-4 intersects with blade 2 bottom.
In the present embodiment, described protruding 2-4 is triangular hill, and triangle base is wheel hub 1 edge, and leg-of-mutton top angle is towards trailing edge 2-2.Described protruding 2-4 is hollow-core construction, and its end face can be uncovered.
As variation, the end face of protruding 2-4 also can seal.
This triangle protruding structure not only can effectively be strengthened blade and wheel hub outer rim intersection, prevent from occurring when this is in fan and runs up cracking or damaging problem, the more important thing is steady and dredging flow effectively, when increasing air quantity, reduce the aerodynamic noise at this place.
The main design improvement of the utility model is positioned on blade near the trailing edge of blade rotary opposite direction.The depression of this triangle depression 2-3 structure from the trailing edge of blade to leading edge direction, is generally positioned near the excircle of blade.By the triangle of specified structure form, and the optimal design such as bottom angle α and triangle degree of depth, this triangle sunk structure can be eliminated eddy current or the turbulent flow that air-flow forms at trailing edge, changes air-flow in the velocity distribution at this place, thereby reduces the aerodynamic noise at this place.
Our experiments show that, under same blade dimensions (diameter), identical voltage conditions, if in the suitable situation of noise, the utlity model has higher air output, higher rotating speed, lower power.Can meet in the use the energy-saving and cost-reducing object of air conditioner product.
The above, be only preferred embodiment of the present utility model, is not the utility model to be done to the restriction of other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.All technical solutions of the utility model contents that do not depart from, any simple modification, equivalent variations and the remodeling above embodiment done according to technical spirit of the present utility model, still belong to the protection domain of technical solutions of the utility model.
Claims (10)
1. an axial fan, comprises wheel hub and a plurality of blade, it is characterized in that: on each trailing edge, be formed with to the depression of blade inlet edge direction.
2. a kind of axial fan according to claim 1, is characterized in that: described depression is V-shaped.
3. a kind of axial fan according to claim 1, is characterized in that: described depression is triangular in shape.
4. a kind of axial fan according to claim 3, is characterized in that: the bottom angle α scope of described triangular shaped recess is 30 °-120 °.
5. a kind of axial fan according to claim 4, is characterized in that: the depth bounds 6-17mm of described triangular shaped recess.
6. according to a kind of axial fan described in any one claim in claim 1 to 5, it is characterized in that: at each trailing edge and wheel hub intersection, be formed with projection.
7. a kind of axial fan according to claim 6, is characterized in that: described projection outside is tangent with the outer rim of wheel hub, and described convex top is substantially concordant with the top of wheel hub, and intersect with blade described projection bottom.
8. a kind of axial fan according to claim 6, is characterized in that: described projection is triangular hill, and triangle base is wheel hub rim, and leg-of-mutton top angle is towards trailing edge.
9. a kind of axial fan according to claim 6, is characterized in that: described projection is hollow-core construction, and its end face is uncovered.
10. an air conditioner, comprises the axial fan described in any one claim in claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320549838.7U CN203420934U (en) | 2013-09-05 | 2013-09-05 | Axial flow fan and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320549838.7U CN203420934U (en) | 2013-09-05 | 2013-09-05 | Axial flow fan and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203420934U true CN203420934U (en) | 2014-02-05 |
Family
ID=50020033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320549838.7U Expired - Lifetime CN203420934U (en) | 2013-09-05 | 2013-09-05 | Axial flow fan and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203420934U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018228066A1 (en) * | 2017-06-16 | 2018-12-20 | 广东美的制冷设备有限公司 | Axial flow wind turbine and air-conditioner |
| CN111271319A (en) * | 2019-01-07 | 2020-06-12 | 奥克斯空调股份有限公司 | Axial flow fan blade and air conditioner |
| WO2021233482A1 (en) * | 2020-12-18 | 2021-11-25 | 青岛海尔空调电子有限公司 | Axial-flow impeller, and axial-flow fan and air conditioner having same |
| CN114165478A (en) * | 2021-11-04 | 2022-03-11 | 华中科技大学 | Bionic axial flow fan blade and modification method thereof |
-
2013
- 2013-09-05 CN CN201320549838.7U patent/CN203420934U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018228066A1 (en) * | 2017-06-16 | 2018-12-20 | 广东美的制冷设备有限公司 | Axial flow wind turbine and air-conditioner |
| CN111271319A (en) * | 2019-01-07 | 2020-06-12 | 奥克斯空调股份有限公司 | Axial flow fan blade and air conditioner |
| WO2021233482A1 (en) * | 2020-12-18 | 2021-11-25 | 青岛海尔空调电子有限公司 | Axial-flow impeller, and axial-flow fan and air conditioner having same |
| CN114645871A (en) * | 2020-12-18 | 2022-06-21 | 青岛海尔空调电子有限公司 | Axial-flow impeller, axial-flow fan with same and air conditioner |
| CN114165478A (en) * | 2021-11-04 | 2022-03-11 | 华中科技大学 | Bionic axial flow fan blade and modification method thereof |
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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: 20140205 |