CN103835992B - Diffusion bleed type flabellum and blade rack - Google Patents
Diffusion bleed type flabellum and blade rack Download PDFInfo
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- CN103835992B CN103835992B CN201410062824.1A CN201410062824A CN103835992B CN 103835992 B CN103835992 B CN 103835992B CN 201410062824 A CN201410062824 A CN 201410062824A CN 103835992 B CN103835992 B CN 103835992B
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Abstract
The invention provides a kind of diffusion bleed type flabellum and blade rack。Wherein, diffusion bleed type flabellum is the flabellum of 5 vane types, and diffusion bleed type flabellum adopts the data parameters such as blade root curve, blade tip curve, leading edge curve, trailing edge curve, wheel hub and flabellum external diameter to design。Flabellum provided by the invention, its flabellum external diameter is little, air quantity big, the noise of generation is little；The spoon of blade structure of design, can be changed the wind direction of the wind that flabellum blows out into diffused by focus type；It addition, be the blade of progressive thickness by the blade design of uniform thickness, it is possible to decrease deflection during blade working；And, it is turbulent flow at blade tip place that flabellum rotates seasonal epidemic pathogens stream, it is possible to decrease flabellum noise。Provided by the invention with diffusion bleed type flabellum with the use of blade rack, can effectively increase the exhaust air rate of flabellum, and make the wind that flabellum is discharged spread to surrounding better, can make flabellum that the radiating effect of the electric elements of upper and lower and left and right directions layout is better。
Description
Technical field
The present invention relates to field of household appliances, more specifically, relate to a kind of spread bleed type flabellum and a kind of and described diffusion bleed type flabellum with the use of blade rack。
Background technology
Along with people's living standard improves, the microwave oven of Wind Volume low noise is the current urgent needss of people。The design of the flabellum on microwave oven needs while meeting heat sinking function, by noise control standing in scope people。
As it is shown in figure 1, microwave oven includes: U plate 100 ', top board 101 ', back plate 102 ', base plate 103 ', magnetron 104 ', waveguide 105 ', unidirectional current source plate, fan component (including motor, flabellum and blade rack) 107 ', frequency converter assembly (including converter and converter IGBT) 108 ', wind scooper 109 ' etc.。Waveguide is welded on outside U plate, and magnetron is fixed by screws on waveguide, and frequency converter assembly is arranged on base plate。Magnetron and frequency converter assembly self can generate heat in the course of the work, and these heats are dispelled the heat by flabellum assembly。
The wind direction of the wind of the flabellum blowout of prior art is difficult to realize magnetron separately positioned up and down and transformer device are fully dispelled the heat simultaneously。Flabellum (flabellums of 4 vane types) easily caused by resonance, causes flabellum to rock when rotating, and produces noise, and causes that wind direction is unstable, reduces flabellum heat dispersion。Its concrete reason includes: the flabellum of design selects the mode increasing external diameter to increase air quantity (external diameter is for 124m), the curved design of the blade relatively simple curve of single radian (leading edge curve, trailing edge curve, blade root curve and the blade tip curve are), additionally, the thickness homogeneous (for 1mm) of the blade of design, the flabellum of this kind of structure operationally can produce very big aerodynamic noise, and microwave oven has a strong impact on daily life in use and produces to use detest sense。
Summary of the invention
It is contemplated that at least solve one of technical problem of existence in prior art。
For this, the invention provides a kind of diffusion bleed type flabellum, its flabellum external diameter is little, air quantity big, the noise that produces is little；The spoon of blade structure of design, can be changed the wind direction of the wind that flabellum blows out into diffused by focus type；It addition, be the blade of progressive thickness by the blade design of uniform thickness, it is possible to decrease deflection during blade working；And, it is turbulent flow at blade tip place that flabellum rotates seasonal epidemic pathogens stream, it is possible to decrease flabellum noise。
The embodiment of first aspect present invention provides a kind of diffusion bleed type flabellum, described flabellum is the flabellum of 5 vane types, the blade root curve of described blade, being projected as 18.0a～19.0amm, be projected as 17.0a～18.0amm in the plane being perpendicular to flabellum axis on flabellum axis direction；The blade tip curve of described blade, being projected as 29.0a～31.0amm, be projected as 54.0a～55.0amm in the plane being perpendicular to flabellum axis on flabellum axis direction；The leading edge curve of described blade, its length is 42.0a～44.0amm, maximum camber is 2.8a～3.2amm；The trailing edge curve of described blade, its length is 39.0a～41.0amm, maximum camber is 1.2a～1.6amm；The projection in the plane being perpendicular to flabellum axis of the described flabellum, distance between the projection of the blade root curve of its blade described in adjacent two is 4.5a～5.5amm, distance between the projection of leaf slightly curve is 20.5a～21.5amm, on the leading edge curve closed on, on the leading edge length of curve position of 0.9 times of blade tip side and trailing edge curve, distance between the projection of the trailing edge length of curve position of 0.9 times of blade tip side is 9.5a～10.5amm, and the distance between the leading edge curve at rear side of blade described in adjacent two and the projection of the trailing edge curve in front side is gradually increased to blade tip by blade root；The thickness of the edge of described blade be 2.0a～3.0amm, trailing edge place thickness be 0.4a～0.8amm；The external diameter of described flabellum is 115a～117amm, and the hub outside diameter of described flabellum is 35.6a～37.5amm；Wherein, a is more than 0。
Flabellum provided by the invention, its flabellum external diameter is little, air quantity big, the noise of generation is little；The spoon of blade structure of design, can be changed the wind direction of the wind that flabellum blows out into diffused by focus type；It addition, be the blade of progressive thickness by the blade design of uniform thickness, it is possible to decrease deflection during blade working；And, it is turbulent flow at blade tip place that flabellum rotates seasonal epidemic pathogens stream, it is possible to decrease flabellum noise。
Compared with other flabellums that provided by the invention diffusion bleed type flabellum is identical with the number of blade, outer blade diameter is equivalently-sized, the air quantity to the wind of (or left and right) direction blowout up and down can be increased, be more conducive to the electric elements to (or left and right) direction is arranged up and down and dispel the heat。
According to one embodiment of present invention, the hub height of described flabellum is 22.0a～24.0amm, and described blade root curve is positioned in the outside wall surface of described wheel hub near one end of the inlet side of described flabellum；The wind of flabellum blowout can be played guide effect when flabellum is dried by the wheel hub of this structure, accelerates flabellum and the electric elements that (or left and right) direction is arranged up and down are dispelled the heat。
According to one embodiment of present invention, the thickness of described blade is gradually reduced to trailing edge place from the edge of described blade, and the curved surface that can make blade is smoother, to reduce the impact to air-flow and obstruction, increases blowing amount。
According to one embodiment of present invention, the blade tip curve of described blade be positioned at on the face of cylinder of described flabellum axis coaxle so that the surface area of blade is bigger, thus increasing the exhaust air rate of flabellum。
According to one embodiment of present invention, the maximum camber of described blade root curve, described blade tip curve, described leading edge curve and described trailing edge curve is respectively positioned on the middle part of curve。
According to one embodiment of present invention, described wheel hub is the hollow circular cylinder of the inlet side opening towards described flabellum, and described cylindrical sidewall thickness is 1.8a～2.2amm, and the thickness of wheel hub is designed as 1.8a～2.2amm can meet the requirement of wheel hub intensity。
According to one embodiment of present invention, described cylindrical inwall being provided with positioning bar, the driving axle of motor be may be installed in cylindrical opening and positioned by positioning bar, and positioning bar also can improve cylindrical bulk strength。
According to one embodiment of present invention, a is 1 or 0.8, selects the fan blade size that above-mentioned two parameter is made less, and meets the cooling requirements of microwave oven, can be preferably applied on microwave oven。
The embodiment of second aspect present invention provides a kind of blade rack, for being used in combination with the diffusion bleed type flabellum described in any of the above-described embodiment, beeline between air-ducting ring and the blade tip of described flabellum of described blade rack is 2.0a～4.0amm, and wherein, a is more than 0。
The support of flabellum provided by the invention, beeline between air-ducting ring and blade tip is designed as 2.0a～4.0amm and with diffusion bleed type with the use of, can effectively increase the exhaust air rate of flabellum, and make the wind that flabellum is discharged spread to surrounding better, can make flabellum that the radiating effect of the electric elements that (or left and right) direction is arranged up and down is better。
According to one embodiment of present invention, the top board of described blade rack offering air inlet, described air inlet is positioned at the inlet side of described blade rack, to increase the intake of flabellum inlet side。
In sum, flabellum provided by the invention, its flabellum external diameter is little, air quantity big, the noise of generation is little；The spoon of blade structure of design, can be changed the wind direction of the wind that flabellum blows out into diffused by focus type；It addition, be the blade of progressive thickness by the blade design of uniform thickness, it is possible to decrease deflection during blade working；And, it is turbulent flow at blade tip place that flabellum rotates seasonal epidemic pathogens stream, it is possible to decrease fan noise。
The additional aspect of the present invention and advantage will become apparent upon in description below part, or recognized by the practice of the present invention。
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 is the structural representation of related art microwave oven one embodiment；
Fig. 2 is the structural representation of diffusion bleed type flabellum of the present invention；
Fig. 3 is the structural representation that diffusion bleed type flabellum Leaf shown in Fig. 2 is connected with wheel hub；
Fig. 4 is the main TV structure schematic diagram of diffusion bleed type flabellum shown in Fig. 2；
Fig. 5 is the decomposition texture schematic diagram of flabellum, blade rack and motor。
Wherein, in Fig. 1, corresponding relation between accompanying drawing labelling and component names is:
100 ' U plates, 101 ' top boards, 102 ' back plate, 103 ' base plates, 104 ' magnetrons, 105 ' waveguides, 107 ' fan components, 108 ' frequency converter assemblies, 109 ' wind scoopers。
In Fig. 2 to Fig. 5, the corresponding relation between accompanying drawing labelling and component names is:
1 blade, 11 blade root curves, 12 blade tip curves, 13 leading edge curves, 14 trailing edge curves, 2 wheel hubs, 21 positioning bars, 3 flabellum axis, 4 blade racks, 41 air-ducting ring, 42 top boards, 43 air inlets, 5 motors。
Detailed description of the invention
In order to be more clearly understood that the above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail。It should be noted that when not conflicting, embodiments herein and the feature in embodiment can be mutually combined。
Elaborate a lot of detail in the following description so that fully understanding the present invention, but, the present invention can also adopt other to be different from mode described here to implement, and therefore, protection scope of the present invention is by the restriction of following public specific embodiment。
Diffusion bleed type flabellum provided by the invention, as shown in Figures 2 to 5, described flabellum is the flabellum of 5 vane types, the blade root curve 11 of described blade 1, being projected as 18.0a～19.0amm, be projected as 17.0a～18.0amm in the plane being perpendicular to flabellum axis 3 on flabellum axis 3 direction；The blade tip curve 12 of described blade 1, being projected as 29.0a～31.0amm, be projected as 54.0a～55.0amm in the plane being perpendicular to flabellum axis 3 on flabellum axis 3 direction；The leading edge curve 13 of described blade 1, its length is 42.0a～44.0amm, maximum camber is 2.8a～3.2amm；The trailing edge curve 14 of described blade 1, its length is 39.0a～41.0amm, maximum camber is 1.2a～1.6amm；The projection in the plane being perpendicular to flabellum axis 3 of the described flabellum, distance C between the projection of the blade root curve 11 of its blade 1 described in adjacent two is 4.5a～5.5amm, distance D between the projection of leaf slightly curve is 20.5a～21.5amm, on the leading edge curve 13 closed on, in the leading edge curve 13 extension position place of 0.9 times of blade tip side and trailing edge curve 14, distance E between the projection at the trailing edge curve 14 extension position place of 0.9 times of blade tip side is 9.5a～10.5amm, and the distance between the leading edge curve 13 at rear side of blade 1 described in adjacent two and the projection of the trailing edge curve 14 in front side is gradually increased to blade tip by blade root；The thickness of the edge of described blade 1 be 2.0a～3.0amm, trailing edge place thickness be 0.4a～0.8amm；The external diameter of described flabellum is 115a～117amm, and wheel hub 2 external diameter of described flabellum is 35.6a～37.5amm；Wherein, a is more than 0。
Flabellum provided by the invention, its flabellum external diameter is little, air quantity big, the noise of generation is little；Blade 1 curved-surface structure of design, can be changed the wind direction of the wind that flabellum blows out into diffused by focus type；It addition, the blade 1 of uniform thickness to be designed as the blade 1 of progressive thickness, it is possible to decrease deflection when blade 1 works；And, it is turbulent flow at blade tip place that flabellum rotates seasonal epidemic pathogens stream, it is possible to decrease flabellum noise。
Compared with other flabellums that diffusion bleed type flabellum provided by the invention is identical with blade 1 number, blade 1 outside dimension is identical, the air quantity to the wind of (or left and right) direction blowout up and down can be increased, be more conducive to the electric elements to (or left and right) direction is arranged up and down and dispel the heat。
In one embodiment of the present of invention, as shown in Fig. 2, Fig. 3 and Fig. 5, the wheel hub 2 of described flabellum is highly 22.0a～24.0amm, and described blade root curve 11 is positioned in the outside wall surface of described wheel hub 2 near one end of the inlet side of described flabellum；The wind of flabellum blowout can be played guide effect when flabellum is dried by the wheel hub 2 of this structure, accelerates flabellum and the electric elements that (or left and right) direction is arranged up and down are dispelled the heat。
Preferably, the thickness of described blade 1 is gradually reduced to trailing edge place from the edge of described blade 1, and the curved surface that can make blade 1 is smoother, to reduce the impact to air-flow and obstruction, increases blowing amount。
Further, as shown in Figure 4, the blade tip curve 12 of described blade 1 is positioned on the face of cylinder coaxial with described flabellum axis 3 so that the surface area of blade 1 is bigger, thus increasing the exhaust air rate of flabellum。
Further, the maximum camber of described blade root curve 11, described blade tip curve 12, described leading edge curve 13 and described trailing edge curve 14 is respectively positioned on the middle part of curve。
Wherein, as in figure 2 it is shown, the hollow circular cylinder that described wheel hub 2 is the inlet side opening towards described flabellum, and described cylindrical sidewall thickness is 1.8a～2.2amm, and the thickness of wheel hub 2 is designed as 1.8a～2.2amm can meet the requirement of wheel hub 2 intensity。
And, described cylindrical inwall is provided with positioning bar 21, the driving axle of motor 5 be may be installed in cylindrical opening and positioned by positioning bar 21, and positioning bar 21 also can improve cylindrical bulk strength。
In one embodiment of the present of invention, a is 1 or 0.8, selects the fan blade size that above-mentioned two parameter is made less, and meets the cooling requirements of microwave oven, can be preferably applied on microwave oven。
Present invention also offers a kind of blade rack, as it is shown in figure 5, for being used in combination with the diffusion bleed type flabellum described in any of the above-described embodiment, the beeline between air-ducting ring 41 and the blade tip of described flabellum of described blade rack 4 is 2.0a～4.0amm, wherein, a is more than 0。
The support of flabellum provided by the invention, beeline between air-ducting ring 41 and blade tip is designed as 2.0a～4.0amm and with diffusion bleed type with the use of, can effectively increase the exhaust air rate of flabellum, and make the wind that flabellum is discharged spread to surrounding better, can make flabellum that the radiating effect of the electric elements that (or left and right) direction is arranged up and down is better。
In one embodiment of the present of invention, the top board 42 of described blade rack 4 offering air inlet 43, described air inlet 43 is positioned at the inlet side of described blade rack 4, to increase the intake of flabellum inlet side。
When a is 1, adopt the diffusion bleed type flabellum of the present invention and the microwave oven of blade rack and the correction data adopting traditional flabellum and blade rack to carry out testing following (wherein, choose the flabellum of identical blade quantity and external diameter specification and select the blade rack of identical air-ducting ring internal diameter):
Wherein, filling 1000ML water, microwave heating 30 minutes in microwave cavity body, magnetron leeward side center carries out boring 1.7mm, transformator and anode of magnetron are carried out temperature survey by Usage data collection device and K type thermocouple。
Transformator microwave oven temperature rise test comparison is as follows:
Frequency-conversion microwave oven temperature rise test comparison:
By above test result, carrying out temperature rise test comparison analysis for transformation microwave oven and frequency-conversion microwave oven, it can be seen that under same rotational speed, the microwave oven radiating effect of the present invention compared with prior art all has improvement in various degree。
When a is 1, adopt the diffusion bleed type flabellum of the present invention and the microwave oven of blade rack and the correction data adopting traditional flabellum and blade rack to carry out testing following (wherein, choose the flabellum of identical blade quantity and external diameter specification and select the blade rack of identical air-ducting ring internal diameter):
Wherein, in semi-anechoic room, fill 1000ML water, microwave heating in microwave cavity body, according to GB, adopt 5 points (front, back, left, right, up, 5 orientation) to carry out noise-measuring。
Frequency-conversion microwave oven noise test comparison
| Flabellum kind | Flabellum installation rotating speed | Noise/dB |
| Prior art flabellum | 2300 | 60 |
| Flabellum of the present invention | 2300 | 56.6 |
When a is 0.8, adopt the diffusion bleed type flabellum of the present invention and the microwave oven of blade rack and the correction data adopting traditional flabellum and blade rack to carry out testing following (wherein, choose the flabellum of identical blade quantity and external diameter specification and select the blade rack of identical air-ducting ring internal diameter):
Wherein, filling 1000ML water, microwave heating 30 minutes in microwave cavity body, magnetron leeward side center carries out boring 1.7mm, transformator and anode of magnetron are carried out temperature survey by Usage data collection device and K type thermocouple。
Transformator microwave oven temperature rise test comparison is as follows:
Frequency-conversion microwave oven temperature rise test comparison:
By above test result, carrying out temperature rise test comparison analysis for transformation microwave oven and frequency-conversion microwave oven, it can be seen that under same rotational speed, the microwave oven radiating effect of the present invention compared with prior art all has improvement in various degree。
When a is 0.8, adopt the diffusion bleed type flabellum of the present invention and the microwave oven of blade rack and the correction data adopting traditional flabellum and blade rack to carry out testing following (wherein, choose the flabellum of identical blade quantity and external diameter specification and select the blade rack of identical air-ducting ring internal diameter):
Wherein, in semi-anechoic room, fill 1000ML water, microwave heating in microwave cavity body, according to GB, adopt 5 points (front, back, left, right, up, 5 orientation) to carry out noise-measuring。
Frequency-conversion microwave oven noise test comparison
| Flabellum kind | Flabellum installation rotating speed | Noise/dB |
| Prior art flabellum | 2400 | 60.8 |
| Flabellum of the present invention | 2400 | 57.5 |
The motor driving flabellum in experiment all adopts identical direct current generator, and rotor diameter is 30mm, input voltage 12V, electric current 0.35A, is fixed on the blade rack shown in Fig. 5。
When a is other numerical value, the size of the flabellum of the present invention and the air-ducting ring of blade rack is proportional increase and reduces, and the air-out mode of flabellum and blade rack will not change, therefore when a takes other numerical value, the flabellum identical with prior art Leaf quantity and external diameter specification and the identical blade rack of air-ducting ring internal diameter are likewise supplied with above-mentioned beneficial effect, do not repeat them here。
In sum, flabellum provided by the invention, its flabellum external diameter is little, air quantity big, the noise of generation is little；The spoon of blade structure of design, can be changed the wind direction of the wind that flabellum blows out into diffused by focus type；It addition, be the blade of progressive thickness by the blade design of uniform thickness, it is possible to decrease deflection during blade working；And, it is turbulent flow at blade tip place that flabellum rotates seasonal epidemic pathogens stream, it is possible to decrease fan noise。
In the description of this specification, specific features, structure, material or feature that the description of term " embodiment " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention。In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example。And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example。
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations。All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention。
Claims (10)
1. a diffusion bleed type flabellum, described flabellum is the flabellum of 5 vane types, it is characterised in that
The blade root curve of described blade, being projected as 18.0a～19.0amm, be projected as 17.0a～18.0amm in the plane being perpendicular to flabellum axis on flabellum axis direction；
The blade tip curve of described blade, being projected as 29.0a～31.0amm, be projected as 54.0a～55.0amm in the plane being perpendicular to flabellum axis on flabellum axis direction；
The leading edge curve of described blade, its length is 42.0a～44.0amm, maximum camber is 2.8a～3.2amm；
The trailing edge curve of described blade, its length is 39.0a～41.0amm, maximum camber is 1.2a～1.6amm；
The projection in the plane being perpendicular to flabellum axis of the described flabellum, distance between the projection of the blade root curve of its blade described in adjacent two is 4.5a～5.5amm, distance between the projection of leaf slightly curve is 20.5a～21.5amm, on the leading edge curve closed on, on the leading edge length of curve position of 0.9 times of blade tip side and trailing edge curve, distance between the projection of the trailing edge length of curve position of 0.9 times of blade tip side is 9.5a～10.5amm, and the distance between the leading edge curve at rear side of blade described in adjacent two and the projection of the trailing edge curve in front side is gradually increased to blade tip by blade root；
The thickness of the edge of described blade be 2.0a～3.0amm, trailing edge place thickness be 0.4a～0.8amm；
The external diameter of described flabellum is 115a～117amm, and the hub outside diameter of described flabellum is 35.6a～37.5amm；
Wherein, a is coefficient, and a is more than 0。
2. diffusion bleed type flabellum according to claim 1, it is characterised in that
The hub height of described flabellum is 22.0a～24.0amm, and described blade root curve is positioned in the outside wall surface of described wheel hub near one end of the inlet side of described flabellum。
3. diffusion bleed type flabellum according to claim 2, it is characterised in that
The thickness of described blade is gradually reduced to trailing edge place from the edge of described blade。
4. diffusion bleed type flabellum according to claim 2, it is characterised in that
The blade tip curve of described blade be positioned at on the face of cylinder of described flabellum axis coaxle。
5. diffusion bleed type flabellum according to claim 2, it is characterised in that
The maximum camber of described blade root curve, described blade tip curve, described leading edge curve and described trailing edge curve is respectively positioned on the middle part of curve。
6. diffusion bleed type flabellum according to claim 2, it is characterised in that
Described wheel hub is the hollow circular cylinder of the inlet side opening towards described flabellum, and described cylindrical sidewall thickness is 1.8a～2.2amm。
7. diffusion bleed type flabellum according to claim 6, it is characterised in that
Described cylindrical inwall is provided with positioning bar。
8. diffusion bleed type flabellum according to any one of claim 1 to 7, it is characterised in that
A is 1 or 0.8。
9. a blade rack, for being used in combination with the diffusion bleed type flabellum according to any one of such as claim 1 to 8, it is characterised in that
Beeline between air-ducting ring and the blade tip of described flabellum of described blade rack is 2.0a～4.0amm。
10. blade rack according to claim 9, it is characterised in that
Offering air inlet on the top board of described blade rack, described air inlet is positioned at the inlet side of described blade rack。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410062824.1A CN103835992B (en) | 2014-02-24 | 2014-02-24 | Diffusion bleed type flabellum and blade rack |
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| CN201410062824.1A CN103835992B (en) | 2014-02-24 | 2014-02-24 | Diffusion bleed type flabellum and blade rack |
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| CN103835992B true CN103835992B (en) | 2016-06-22 |
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| CN106499650A (en) * | 2016-11-22 | 2017-03-15 | 广东美的厨房电器制造有限公司 | The radiator fan of microwave oven and the microwave oven with which |
| CN108167222B (en) * | 2017-12-06 | 2019-10-22 | 九阳股份有限公司 | A kind of cooking apparatus quiet fan |
| CN109099009A (en) * | 2018-10-24 | 2018-12-28 | 美的集团股份有限公司 | Axial-flow windwheel, air-conditioner outdoor unit and air conditioner |
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| KR100820856B1 (en) * | 2003-03-05 | 2008-04-11 | 한라공조주식회사 | Axial flow fan |
| CN2625621Y (en) * | 2003-04-01 | 2004-07-14 | 中国科学院工程热物理研究所 | Axial ventilator impeller with antecurvature blade |
| JP5259919B2 (en) * | 2005-07-21 | 2013-08-07 | ダイキン工業株式会社 | Axial fan |
| CN201159203Y (en) * | 2008-05-18 | 2008-12-03 | 威海克莱特菲尔风机有限公司 | Low noise axial fan blade |
| CN203756596U (en) * | 2014-02-24 | 2014-08-06 | 广东美的厨房电器制造有限公司 | Diffusion-blowing-type fan blade and fan blade support |
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