CN103486081B - Axial-flow fan blade, fan and air-conditioner outdoor unit - Google Patents

Axial-flow fan blade, fan and air-conditioner outdoor unit Download PDF

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Publication number
CN103486081B
CN103486081B CN201210191680.0A CN201210191680A CN103486081B CN 103486081 B CN103486081 B CN 103486081B CN 201210191680 A CN201210191680 A CN 201210191680A CN 103486081 B CN103486081 B CN 103486081B
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China
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axial
blade
bending section
section
radial cross
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CN103486081A (en
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肖彪
董术海
肖忠弟
余锐生
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The invention discloses an axial-flow fan blade, which comprises a hub capable of rotating around a central shaft, and a plurality of blades radially extended outwards from the hub and arranged around the central shaft, wherein each blade is provided with a pressure face, a suction surface, a front edge and a rear edge; each blade is provided with a blade body, and a bending part arranged on the outer edge of the blade body and extended to the rear edge from the front edge; and a shape of the radial cross section of each bending part is in a convex curvilinear shape relative to each suction surface. According to the axial-flow fan blade provided by the invention, under the conditions that the air pressure is constant and the diameter of each fan blade is not increased, the air volume of the axial-flow fan blade can be effectively improved, the noise can be reduced, the requirements of silence and environment protection of an air conditioner can be met, and in addition, the axial-flow fan blade has the advantages of simple structure and easiness in processing and manufacturing. Meanwhile, the invention also discloses a fan comprising the axial-flow fan blade and an air-conditioner outdoor unit.

Description

Axial-flow leaf, blower fan and air-conditioner outdoor unit
Technical field
The present invention relates to fan blade, more particularly to a kind of axial-flow leaf, and there is blower fan and the air-conditioner of this axial-flow leaf Off-premises station.
Background technology
Axial-flow leaf is commonly used in air-conditioner outdoor unit or other air regenerating devices, and the power for inputting motor turns Circulating for air, thus carry out forced-convection heat transfer.The quality of axial-flow leaf design, the cooling and warming to air conditioner Ability, Energy Efficiency Ratio, noise etc. have material impact.
Existing air-conditioner axial-flow leaf, its basic structure includes the circular hub with center of rotation and is distributed in wheel Several blades that hub periphery side are arranged radially, its Leaf has aerofoil, leading edge and trailing edge, and its trailing edge is slightly linear Shape.Rotated by Motor drive, air flows into from the leading edge of blade, flowed out by the trailing edge of blade after boosted by aerofoil.
Existing air-conditioner outdoor unit commonly uses low pressure axial-flow fan, its except requiring compact conformation, outside air quantity is big, low noise Sound is even more a critically important index.In order to improve the air quantity of axial-flow leaf, generally pass through to change the installation of axial-flow leaf blade The modes such as angle, blade shape, blade curved sweep angle degree and then the blade lift that increases, increase air-out wind speed, improve and stream flow field to reach To increase air quantity purpose.And in terms of fan blade noise, noise of axial flow fan is mainly aerodynamic noise, it is by two parts group Become: i.e. rotational noise and eddy current crack.Research shows, when rotational noise is fan blade rotation, its blade makees cycle movement, to sky Gas applies larger varying accelerated motion, causes air to produce larger pressure fluctuation, air particle is in the effect of cyclic force The larger impact noise of lower generation.And when rotating operating mode, air-flow enters fan blade runner and enters the gas angle of attack in centrifugal action and greatly Downstream impact fan blade leading edge caused by gas boundary layer separate and produce vortex and form eddy current crack.Additionally, it is this kind of There is larger pressure differential, this will lead to exit flow vortex and top between the pressure face of the blade of fan blade and suction surface Air-flow vortex, vortex and the collision of fan blade guiding device, next the blade air movement disorder simultaneously causing, thus produce larger Noise.In this two noise like of blower fan, rotational noise is proportional to 10 powers of the peripheral speed of impeller;Eddy current crack and impeller 6 powers (or 5 powers) of peripheral speed are proportional.
In order to reach the effect of fan blade Wind Volume, mute, all circles scientific worker has carried out substantial amounts of work and trial, Also obtain certain breakthrough, but problem yet suffers from.
Content of the invention
For above-mentioned state of the art, first technical problem to be solved by this invention is, provides a kind of structure Simply, the axial-flow leaf manufacturing and effectively reducing noise easy to process.
Second technical problem to be solved by this invention is, provides a kind of blower fan with above-mentioned axial-flow leaf.
3rd technical problem to be solved by this invention is, provides a kind of air conditioner chamber with above-mentioned axial-flow leaf Outer machine.
The present invention solves the technical scheme that adopted of above-mentioned first technical problem: a kind of axial-flow leaf, including can enclose The wheel hub that rotates around central shaft and extending radially outwardly and some blades around described central shaft arrangement from this wheel hub, each Described blade is respectively provided with pressure face, suction surface, leading edge and trailing edge, and each described blade all includes blade body and is arranged at this leaf Piece body peripheral edge and extended to the bending section of described trailing edge by described leading edge, the radial cross-sectional shape phase of described bending section It is in convex outer curve shape for described suction surface.
Wherein in an embodiment, by described leading edge to described trailing edge, the curvature of the radial cross-section of described bending section First change from small to big, more from large to small.
Wherein in an embodiment, the radial cross-section of described bending section maximum curvature is located at described bending section from described Leading edge starts any one place in 25~45% length.
Wherein in an embodiment, the curvature of the radial cross-section a of described bending section maximum curvature is ρ 1, described leading edge The curvature of the radial cross-section b of corresponding described bending section is ρ 2, the radial cross-section c of the corresponding described bending section of described trailing edge Curvature be ρ 3, and ρ 1: ρ 2: ρ 3=0.02~0.05: 0.001~0.01: 0.003~0.01.
Wherein in an embodiment, the curvature of the radial cross-section between radial cross-section b, a, c of described bending section With ρ 2, ρ 1 and the linear transition of ρ 3.
Wherein in an embodiment, the maximum gauge d1 of described bending section and the maximum gauge d2 of described blade body it Than for 0.70~0.95.
Wherein in an embodiment, described blade body is smoothly transitted by circular arc with described bending section.
Wherein in an embodiment, the maximum gauge d3 of described wheel hub with the ratio of the maximum gauge d1 of described bending section is 0.25~0.35.
The present invention solves the technical scheme that adopted of above-mentioned second technical problem: a kind of blower fan, it include motor and Above-mentioned axial-flow leaf.
The technical scheme that above-mentioned second technical problem of present invention solution is adopted is: a kind of air-conditioner outdoor unit, its bag Include above-mentioned blower fan.
Compared with prior art, axial-flow leaf provided by the present invention, its blade outer end portion is provided with bending section, bending section The pressure differential between the pressure face of blade and suction surface can be reduced so that air-flow is passed through pressure face and suction surface Juncture area, reduces the intensity that air stream is formed about being vortexed in blade neighboring, and then reduces vortex and fan blade water conservancy diversion dress Put collision and the disturbance to adjacent blades, and then lower the overall noise levels of fan blade.
Axial-flow leaf provided by the present invention, in the case that blast is constant and fan blade diameter does not increase, can effectively improve axle The air quantity of stream fan blade, and noise can be reduced, disclosure satisfy that the mute of air-conditioner and the requirement of environmental protection.In addition, institute of the present invention The axial-flow leaf providing also has the advantages that structure is simple, manufacture easy to process.
Brief description
Fig. 1 is the front schematic view of the axial-flow leaf in the one of embodiment of the present invention;
Fig. 2 is the axonometric schematic diagram of axial-flow leaf shown in Fig. 1;
Fig. 3 is the structural representation of the blade of axial-flow leaf shown in Fig. 1;
Fig. 4 is the axonometric schematic diagram in another direction of axial-flow leaf shown in Fig. 1.
Each in figure above, 10- wheel hub, 20- blade, 21- pressure face, 22- suction surface, 23- leading edge, 24- trailing edge, 25- leaf Piece body, 26- bending section.
Specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments the present invention is described in detail.It should be noted that not conflicting In the case of, the feature in following embodiment and embodiment can be mutually combined.
In the one of embodiment of the present invention, provide a kind of axial-flow leaf, as shown in Figure 1, 2, the axle stream wind of the present embodiment Leaf is three wings formula axial-flow leaf, it include can extending radially outwardly around the wheel hub 10 of central shaft rotation with from this wheel hub 10 and Around three blades 20 of described central shaft arrangement, three blades 20 in the range of 120 ° ± 5 ° equally or unequal-interval Distribution.Axial-flow leaf is made using synthetic resin or metal material, and each blade 20 is formed as with the outer peripheral face of wheel hub 10 Integrally.Preferably, the ratio of wheel hub 10 maximum gauge d3 and blade 20 maximum gauge (namely bending section maximum gauge) d1 is 0.25 ~0.35, preferably 0.28,0.30,0.32, so on the basis of ensureing blade structure intensity, blade 20 face can be increased again as far as possible Long-pending, reduce wheel hub 10 central backflow degree so that fan blade efficiency reaches highest.
Every blade 20 has pressure face 21, suction surface 22, leading edge 23 and trailing edge 24, and every blade 20 includes equal blade Body 25 and bending section 26, bending section 26 is arranged on the outer peripheral edge of blade body 25 and is extended to by described leading edge 23 described Trailing edge 24, and the radial cross-sectional shape of described bending section 26 is in convex outer curve shape with respect to suction surface 22.Bending section 26 is permissible Pressure differential between the pressure face of reduction blade and suction surface is so that air-flow is passed through the boundary of pressure face and suction surface Region, is reduced the intensity that air stream is formed about in blade neighboring being vortexed, and then reduces vortex and touched with fan blade guiding device Hit and the disturbance to adjacent blades, and then lower the overall noise levels of fan blade.
Preferably, described blade body 25 and described bending section 26 are smoothly transitted by circular arc.
Preferably, the ratio 0.70 of the maximum gauge d1 of the described bending section 26 and maximum gauge d2 of described blade body 25~ 0.95, preferably 0.75,0.80,0.85,0.90.The size of bending section 26 and blade body 25 adopts this scope, both permissible Lower the pressure differential between the pressure face 21 of blade 20 and suction surface 22, reduce air stream and be formed about in blade 20 neighboring The intensity of vortex, can avoid simultaneously again due to pressure face 21 static pressure low excessive.
Preferably, bending section 26 adopts variable curvature form, by blade 20 leading edge 23 to blade 20 trailing edge 24, bending section 26 The curvature of radial cross-section is first changed from small to big, more from large to small.As shown in Figure 3,4, for the ease of description, defined below: described The radial cross-section of bending section 26 maximum curvature is cross section a, the radial cross-section of the described bending section 26 corresponding to leading edge 23 For cross section b, the radial cross-section of the described bending section 26 corresponding to trailing edge 24 is cross section c.Preferably, cross section a is located at Described bending section 26 from leading edge 23 start 25~45% length in any one from.Preferably, cross section a, cross section b, transversal C corresponding curvature in face is respectively ρ 1, ρ 2, ρ 3, then ρ 1: ρ 2: ρ 3=(0.02~0.05): (0.001~0.01): (0.003~ 0.01) reach optimum efficiency, remaining crossover position curvature and ρ 1, ρ 2, the linear transition of ρ 3.Bending section 26 adopts variable curvature to design Afterwards, the pressure differential between the pressure face 21 of blade 20 and suction surface 22 can be reduced further, air-flow is passed through pressure Face 21 and the juncture area of suction surface 22, reduce the intensity that air stream is formed about in blade 20 neighboring being vortexed, and then subtract Little vortex and the collision of fan blade guiding device and the disturbance to adjacent blades 20, thus produce the noise reducing fan blade.
In another embodiment of the present invention, provide a kind of blower fan, it includes the axial-flow leaf in motor and above-described embodiment.
In another embodiment of the present invention, provide a kind of air-conditioner outdoor unit, it includes described blower fan.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present invention Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.

Claims (9)

1. a kind of axial-flow leaf, including can extend radially outwardly and around institute around the wheel hub of central shaft rotation and from this wheel hub State central shaft arrangement some blades, each described blade be respectively provided with pressure face, suction surface, leading edge and trailing edge it is characterised in that Each described blade all include blade body and be arranged at this blade body outer peripheral edge and by described leading edge extend to described after The bending section of edge, the radial cross-sectional shape of described bending section is in convex outer curve shape with respect to described suction surface, by described leading edge To described trailing edge, the curvature of the radial cross-section of described bending section is first changed from small to big, more from large to small.
2. axial-flow leaf according to claim 1 is it is characterised in that the radial cross-section position of described bending section maximum curvature In described bending section from described leading edge start in 25~45% length any one from.
3. axial-flow leaf according to claim 1 is it is characterised in that the radial cross-section a of described bending section maximum curvature Curvature be ρ 1, the curvature of the radial cross-section b of the corresponding described bending section of described leading edge is ρ 2, and described trailing edge is corresponding described The curvature of the radial cross-section c of bending section is ρ 3, and ρ 1: ρ 2: ρ 3=0.02~0.05: 0.001~0.01: 0.003~0.01.
4. axial-flow leaf according to claim 3 is it is characterised in that between radial cross-section b, a, c of described bending section The curvature of radial cross-section and ρ 2, ρ 1 and the linear transition of ρ 3.
5. axial-flow leaf according to claim 1 is it is characterised in that the maximum gauge d1 of described bending section and described blade The ratio of the maximum gauge d2 of body is 0.70~0.95.
6. axial-flow leaf according to claim 1 is it is characterised in that described blade body passes through circular arc with described bending section Smoothly transit.
7. axial-flow leaf as claimed in any of claims 1 to 6 is it is characterised in that the maximum gauge of described wheel hub The ratio of the d3 and maximum gauge d1 of described bending section is 0.25~0.35.
8. a kind of blower fan is it is characterised in that include motor and axial-flow leaf as claimed in any of claims 1 to 7 in one of claims.
9. a kind of air-conditioner outdoor unit is it is characterised in that include blower fan as claimed in claim 8.
CN201210191680.0A 2012-06-11 2012-06-11 Axial-flow fan blade, fan and air-conditioner outdoor unit Active CN103486081B (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104329276A (en) * 2014-11-28 2015-02-04 德清振达电气有限公司 Efficient mute axial flow fan
CN109538532A (en) * 2018-12-19 2019-03-29 珠海格力电器股份有限公司 Axial-flow leaf, air interchanger and air conditioner
WO2020155430A1 (en) * 2019-01-30 2020-08-06 广东美的制冷设备有限公司 Fan blade assembly, fan assembly, air duct component, and air conditioner
WO2021111582A1 (en) * 2019-12-05 2021-06-10 三菱電機株式会社 Axial flow fan, blowing device, and refrigeration cycle device
CN113638906A (en) * 2021-08-12 2021-11-12 珠海格力电器股份有限公司 Axial flow fan blade, axial flow fan and air conditioner

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CN1522343A (en) * 2002-02-28 2004-08-18 大金工业株式会社 Fan
CN101203680A (en) * 2005-07-21 2008-06-18 大金工业株式会社 Axial flow fan
CN202628612U (en) * 2012-06-11 2012-12-26 珠海格力电器股份有限公司 Axial flow fan blade, fan and air conditioner outdoor machine

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US5215441A (en) * 1991-11-07 1993-06-01 Carrier Corporation Air conditioner with condensate slinging fan
CN1522343A (en) * 2002-02-28 2004-08-18 大金工业株式会社 Fan
CN101203680A (en) * 2005-07-21 2008-06-18 大金工业株式会社 Axial flow fan
CN202628612U (en) * 2012-06-11 2012-12-26 珠海格力电器股份有限公司 Axial flow fan blade, fan and air conditioner outdoor machine

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