CN201517513U - Axial-flow fan and outdoor unit of air conditioner with same - Google Patents
Axial-flow fan and outdoor unit of air conditioner with same Download PDFInfo
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- CN201517513U CN201517513U CN2009203102872U CN200920310287U CN201517513U CN 201517513 U CN201517513 U CN 201517513U CN 2009203102872 U CN2009203102872 U CN 2009203102872U CN 200920310287 U CN200920310287 U CN 200920310287U CN 201517513 U CN201517513 U CN 201517513U
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- axial fan
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Abstract
The utility model provides an axial-flow fan and an outdoor unit of an air conditioner with the same, solving the problems in the prior art that the wideband noise is high and the efficiency is low. The axial-flow fan comprises a plurality of blades and is characterized in that a depression group formed by a plurality of depressions is arranged at the back face of each blade. The depression group arranged at the suction surface (non-load surface) of the blade has two principal effects: 1, reducing the thickness of a boundary layer of the suction surface and weakening the whorl noise; and 2, accurately controlling the turning point of the boundary layer and decreasing the fall off intensity of the tail whorl by the distribution of the depressions, thus reducing the noise.
Description
Technical field
The utility model relates to and belongs to air-conditioning and refrigeration engineering technical field, and specifically, what relate to is a kind of axial fan of new structure, and this axial fan is configured on the air conditioner outdoor machine usually.
Background technique
The important performance indexes of the axial fan of existing air conditioner outdoor machine is the noise size.In axial fan, although the noise of subsonic velocity axial-flow blower mainly is made up of sound source of the dipole, the difference owing to working condition can also be subdivided into the different origin causes of formation.Generally the frequency spectrum characteristic by noise can be divided into broadband noise and discrete noise, and is wherein closely related for the eddy current that produces in broadband noise and the air flows.The vacuum side of blade surface of existing axial fan is the plane, and vacuum side of blade also can be called suction surface.Because the viscous effect of gas when gas stream is crossed blade suction surface (unsupported face), is close to the surface and is formed boundary layer.As when flowing through blade surface, the suction surface of blade and pressure side all can form boundary layer.And because the fluid particles'motions characteristic is in boundary layer and outside the boundary layer, far different.Because the existence of velocity gradient will form the micro cyclone that a lot of rotation speeds do not wait in the boundary layer.So can be referred to as attached backset bed again.These disorderly vortexs cause the pulsation of blade surface pressure, and attached face is thickeied gradually on suction surface especially, and vortex strengthens thereupon, cause big noise.
From behavior of boundary layer, be the laminar flow boundary layer the last period, and back one section is turbulent boundary layer, and the position that the mesosphere flows to the turbulent flow conversion is called the boundary layer turning point.Laminar flow boundary layer surface friction drag is little, vortex a little less than; The turbulent flow bed thickness, surface friction drag is big, and vortex is stronger, therefore wishes that whole blade keeps laminar condition as far as possible.But excessive laminar flow does not still change when twisting through blade trailing edge, will cause stronger trailing vortex to come off and forms the trailing vortex noise that comes off, and therefore correct control is to make laminar flow change turbulent condition immediately into before near trailing edge, to reduce the trailing vortex intensity that comes off.
Summary of the invention
The utility model provides a kind of axial fan and the air conditioner outdoor machine of this fan has been installed, and it can solve problems such as the high and efficient of broadband noise that prior art exists is low.
In order to reach the purpose that solves the problems of the technologies described above, the technical solution of the utility model is that a kind of axial fan comprises a plurality of blades, it is characterized in that: each described vacuum side of blade has the pit group who is formed by a plurality of pits.
In the technical solution of the utility model, also have following technical characteristics: described pit group arranges that zone distance is: from the root 5-15mm scope apart from described blade, outwards extend to the distance apart from described blade radius 0.50-0.85.
In the technical solution of the utility model, also have following technical characteristics: described pit group edge is 7.5-12.5mm apart from the front and rear edges distance range of described blade.
In the technical solution of the utility model, also have following technical characteristics: each described pit diameter scope is 3～7mm, depth bounds 0.75～1.25mm.
In the technical solution of the utility model, also have following technical characteristics: adjacent described pit centres is 15～20mm apart from scope.
In the technical solution of the utility model, also have following technical characteristics: the blade inlet edge end of each described blade is formed with the triangle small leaf, and described blade and described triangle small leaf are integral type.
In the technical solution of the utility model, also have following technical characteristics: the triangle bottom side length scope of each described triangle small leaf is 0.15～0.30 of a blade radius.
In the technical solution of the utility model, also have following technical characteristics: the side size range of each described triangle small leaf is 0.20～0.40 of a blade periphery arc length.
In the technical solution of the utility model, also have following technical characteristics: the triangle drift angle angular range of each described triangle small leaf is 25 °～32 °.
A kind of air conditioner outdoor machine is equipped with above-mentioned any described axial fan of technological scheme.
Axial fan of the present utility model is provided with the pit group at blade suction surface (unsupported face), and its effect mainly contains 2 points: 1) reduce the thickness of suction surface boundary layer, weaken the whirlpool noise.2) by the distribution of pit, correctly control the boundary layer turning point, reduce the trailing vortex intensity that comes off, thereby reduce noise.
Blade employing triangle small leaf structure can be so that adjacent two blade pitghs be big from change, like this can be so that the turbulent flow that fan suction surface air produces breaks away from blade easily and goes, reduce the influence that turns over the blade incoming flow to follow-up simultaneously, make the turbulence scale of each blade incoming flow reduce, Da Pian air-flow comes off and the stall phenomenon be difficult to take place like this, thereby improves static pressure, reduces noise, raises the efficiency.Hence one can see that, and this fan reduces broadband noise by the fan blade shape is improved, and improve fan efficiency.
This shows, use axial fan of the present utility model can well reduce the noise of air conditioner outdoor machine.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described in detail.
Fig. 1 is the rear view of the novel axial fan of this reality;
Fig. 2 is the front perspective view of the novel axial fan of this reality;
1, axial fan; 2, blade; 2-1, triangle small leaf; 2-2, blade inlet edge; 2-3, trailing edge; 3, pit group; 3-1, pit; The drift angle of α, triangle small leaf; The triangle length of side of a, triangle small leaf; The triangle base of b, triangle small leaf; C, pit group arrange zone distance; L, blade periphery arc length.
Embodiment
Referring to Fig. 1, at the back side of axial fan 1, also can be called suction surface, be furnished with the pit group 3 who forms by pit 3-1.Described pit group 3 arranges that zone distance is: from the root 5～15mm scope apart from described blade, outwards extend to the distance apart from described blade radius 0.50～0.85.In the present embodiment, from the root 10mm scope apart from described blade, the pit group arranges that zone distance c is a blade radius 0.75.Blade 2 radiuses are that the axle center of axial fan 1 is to blade 2 outer peripheral ultimate ranges.Each described pit 3-1 diameter range is 3～7mm, depth bounds 0.75～1.25mm.In the present embodiment, described pit 3-1 diameter is 5mm, and the degree of depth is 1mm.Adjacent described pit centres is 15～20mm apart from scope, and evenly arranges.
Described pit group 3 edges are 7.5～12.5mm apart from described blade inlet edge 2-2 and trailing edge 2-3 distance range.
Referring to Fig. 2, axial fan 1 is for turning clockwise.The blade inlet edge 2-2 end of each described blade 2 is formed with the triangle small leaf 2-1 towards sense of rotation, the position is set as shown in Figure 2.Described blade 2 and described triangle small leaf 2-1 are integral type.The triangle bottom side length b scope of each described triangle small leaf 2-1 is 0.15～0.30 of a blade radius.The length of side a scope of each described triangle small leaf is 0.20～0.40 of a blade periphery arc length.The triangle drift angle angle [alpha] scope of each described triangle small leaf is 25 °～32 °.
Pit group 3 on each blade 2 forms two above pit groups 3 in can be between the setting area as required, can be blank spaces between the pit group 3, also can realize reducing the purpose of noise.
The above, it only is preferred embodiment of the present utility model, be not to be the restriction of the utility model being made other form, 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.But every technical solutions of the utility model content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection domain of technical solutions of the utility model according to technical spirit of the present utility model.
Claims (10)
1. an axial fan comprises a plurality of blades, it is characterized in that: each described vacuum side of blade has the pit group who is formed by a plurality of pits.
2. a kind of axial fan according to claim 1 is characterized in that, described pit group arranges that zone distance is: from the root 5～15mm scope apart from described blade, outwards extend to the distance apart from described blade radius 0.50～0.85.
3. a kind of axial fan according to claim 2 is characterized in that: described pit group edge is 7.5～12.5mm apart from the front and rear edges distance range of described blade.
4. a kind of axial fan according to claim 1 is characterized in that: each described pit diameter scope is 3～7mm, depth bounds 0.75～1.25mm.
5. a kind of axial fan according to claim 4 is characterized in that: adjacent described pit centres is 15～20mm apart from scope.
6. a kind of axial fan according to claim 1 is characterized in that: the blade inlet edge end of each described blade is formed with the triangle small leaf, and described blade and described triangle small leaf are integral type.
7. a kind of axial fan according to claim 6 is characterized in that: the triangle bottom side length scope of each described triangle small leaf is 0.15～0.30 of a blade radius.
8. a kind of axial fan according to claim 7 is characterized in that: the side size range of each described triangle small leaf is 0.20～0.40 of a blade periphery arc length.
9. a kind of axial fan according to claim 6 is characterized in that: the triangle drift angle angular range of each described triangle small leaf is 25 °～32 °.
10. an air conditioner outdoor machine is characterized in that: above-mentioned any described axial fan of claim is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203102872U CN201517513U (en) | 2009-09-14 | 2009-09-14 | Axial-flow fan and outdoor unit of air conditioner with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203102872U CN201517513U (en) | 2009-09-14 | 2009-09-14 | Axial-flow fan and outdoor unit of air conditioner with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201517513U true CN201517513U (en) | 2010-06-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203102872U Expired - Lifetime CN201517513U (en) | 2009-09-14 | 2009-09-14 | Axial-flow fan and outdoor unit of air conditioner with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201517513U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777419A (en) * | 2012-07-31 | 2012-11-14 | 苏州市伦琴工业设计有限公司 | Energy-saving fan blade |
| CN103122872A (en) * | 2011-11-21 | 2013-05-29 | 珠海格力电器股份有限公司 | Axial flow fan |
| CN103511340A (en) * | 2012-06-28 | 2014-01-15 | 珠海格力电器股份有限公司 | Axial-flow fan and air conditioner comprising axial-flow fan |
| CN103629156A (en) * | 2013-11-28 | 2014-03-12 | 浙江亿利达风机股份有限公司 | Low-noise and efficient cooling axial flow fan of central air conditioner outdoor unit |
| CN106545521A (en) * | 2017-01-16 | 2017-03-29 | 江苏汇创机电科技股份有限公司 | A kind of brshless DC motor noise reduction impeller |
| CN108431428A (en) * | 2015-11-16 | 2018-08-21 | 雷姆控股有限公司 | For the low noise of axial flow blower and rotor and efficient blade and the axial flow blower including the blade or rotor |
| 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 |
| CN111523220A (en) * | 2020-04-17 | 2020-08-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Fan and compressor rotating-static interference broadband noise rapid prediction method considering flow influence |
-
2009
- 2009-09-14 CN CN2009203102872U patent/CN201517513U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122872A (en) * | 2011-11-21 | 2013-05-29 | 珠海格力电器股份有限公司 | Axial flow fan |
| CN103122872B (en) * | 2011-11-21 | 2016-02-10 | 珠海格力电器股份有限公司 | Axial fan |
| CN103511340A (en) * | 2012-06-28 | 2014-01-15 | 珠海格力电器股份有限公司 | Axial-flow fan and air conditioner comprising axial-flow fan |
| CN103511340B (en) * | 2012-06-28 | 2016-03-02 | 珠海格力电器股份有限公司 | Axial-flow leaf and comprise the air-conditioning of this axial-flow leaf |
| CN102777419A (en) * | 2012-07-31 | 2012-11-14 | 苏州市伦琴工业设计有限公司 | Energy-saving fan blade |
| CN103629156A (en) * | 2013-11-28 | 2014-03-12 | 浙江亿利达风机股份有限公司 | Low-noise and efficient cooling axial flow fan of central air conditioner outdoor unit |
| CN103629156B (en) * | 2013-11-28 | 2015-10-28 | 浙江亿利达风机股份有限公司 | A kind of central air conditioner outdoor unit but axial-flow blower of low-noise high-efficiency |
| CN108431428A (en) * | 2015-11-16 | 2018-08-21 | 雷姆控股有限公司 | For the low noise of axial flow blower and rotor and efficient blade and the axial flow blower including the blade or rotor |
| CN106545521A (en) * | 2017-01-16 | 2017-03-29 | 江苏汇创机电科技股份有限公司 | A kind of brshless DC motor noise reduction impeller |
| CN106545521B (en) * | 2017-01-16 | 2019-01-25 | 江苏汇创机电科技股份有限公司 | A kind of brshless DC motor noise reduction impeller |
| 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 |
| CN111523220A (en) * | 2020-04-17 | 2020-08-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Fan and compressor rotating-static interference broadband noise rapid prediction method considering flow influence |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: QINGDAO GUO'EN TECHNOLOGY CO., LTD. Free format text: FORMER NAME: QINGDAO GON TECHNOLOGY DEVELOPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: No. 2 Road 266109 Shandong city of Qingdao province Chengyang Jihongtan Qingda Industrial Park Patentee after: Qingdao Guoen Science & Technology Co., Ltd. Address before: No. 2 Road 266109 Shandong city of Qingdao province Chengyang Jihongtan Qingda Industrial Park Patentee before: Qingdao Gon Technology Development Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100630 |