CN103511340A - Axial-flow fan and air conditioner comprising axial-flow fan - Google Patents
Axial-flow fan and air conditioner comprising axial-flow fan Download PDFInfo
- Publication number
- CN103511340A CN103511340A CN201210219879.XA CN201210219879A CN103511340A CN 103511340 A CN103511340 A CN 103511340A CN 201210219879 A CN201210219879 A CN 201210219879A CN 103511340 A CN103511340 A CN 103511340A
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- China
- Prior art keywords
- axial
- flow leaf
- groove
- blade
- described groove
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Abstract
The invention provides an axial-flow fan and an air conditioner comprising the axial-flow fan. The axial-flow fan comprises a hub and a plurality of blades arranged at the periphery of the hub in the axial direction, the blades are same in structure, and grooves are formed in the positions, close to the front edges, of the suction surfaces of the blades. According to the axial-flow fan and the air conditioner, the grooves are formed in the positions, close to the front edges, of the suction surfaces of the blades to enable the structures of the suction surfaces of the blades to be adjusted, the airflow flowing modes of the suction surfaces are further changed, the vortex generation and shedding modes are improved, and the aim of lowering noise is finally achieved.
Description
Technical field
The present invention relates to axial-flow blower technical field, in particular to a kind of axial-flow leaf and comprise the air-conditioning of this axial-flow leaf.
Background technique
Axial-flow leaf is the vitals in air conditioner outdoor machine, and its noise performance can directly have influence on the overall performance of air conditioner.Therefore, how, in the situation that guaranteeing air quantity, the noise that reduces axial-flow leaf has become a difficult problem in technical research field, air channel.
At present, axial-flow leaf, in operation process, in blade inlet edge suction surface surface, tends to produce whirlpool boundary layer separation, can produce eddy current simultaneously, along with coming off of whirlpool, just can produce corresponding whirlpool noise.So not only can cause the noise total value of axial-flow leaf to increase, and tonequality also can become poorer.
Summary of the invention
The present invention aims to provide a kind of axial-flow leaf and comprises the air-conditioning of this axial-flow leaf, with in the situation that guaranteeing air quantity, reduces the noise of axial-flow leaf.
To achieve these goals, according to an aspect of the present invention, provide a kind of axial-flow leaf, comprised wheel hub and the identical blade of a plurality of structures being arranged on vertically in wheel hub periphery, blade suction surface offers groove on the position near leading edge.
Further, the elongated slot that the bearing of trend that groove is the leading edge along blade suction surface extends.
Further, hub radius R
0with fan blade radius R
3ratio be 0.2≤R
0/ R
3≤ 0.3.
Further, the beeline R at groove distance wheel hub center
1with fan blade radius R
3ratio be 0.25≤R
1/ R
3≤ 0.5.
Further, the longest distance R at groove distance wheel hub center
2with fan blade radius R
3ratio be 0.5≤R
2/ R
3≤ 1.0.
Further, the A/F W of groove
1with the ratio of aerofoil profile chord length L be 0.05≤W
1/ L≤0.3.
Further, the front end towards blade inlet edge of groove to the circumferential distance d of blade inlet edge and the ratio of aerofoil profile chord length L be 0.1≤d/L≤0.5.
Further, the cross-sectional profiles of groove one of is following form: circular arc; Parabola shaped, or by straight line and/or curve, be connected in sequence linear.
Further, the cross section of groove is trapezoidal.
Further, the width W of slot opening end
1be greater than the width W of bottom surface
2, the acute angle becoming between the sidewall of groove and bottom surface is 90 ° of 10 °≤θ <.
Further, the height h of groove
1thickness h with blade with groove corresponding position
2ratio be 0 < h
1/ h
2≤ 0.4.
According to a further aspect in the invention, provide a kind of air-conditioning, had axial-flow leaf, axial-flow leaf is above-mentioned axial-flow leaf.
Axial-flow leaf of the present invention and comprise the air-conditioning of this axial-flow leaf, by offer groove near on the position of leading edge on blade suction surface, to adjust blade suction surface structure, and then changed suction surface air current flow mode, improve the generation of eddy current and the mode that comes off, and finally reached the object that reduces noise.
Accompanying drawing explanation
The Figure of description that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic diagram of the stereochemical structure of axial-flow leaf of the present invention;
Fig. 2 shows the schematic diagram of the top perspective structure of axial-flow leaf of the present invention;
Fig. 3 a shows the cross-sectional schematic of A-A as shown in Figure 2 of axial-flow leaf of the present invention;
Fig. 3 b shows the local enlarged diagram at the B place of axial-flow leaf as shown in Figure 3 a;
Fig. 4 shows the structural representation of the axial-flow leaf Leaf of axial-flow leaf of the present invention;
Fig. 5 shows the part of the axial-flow leaf Leaf of axial-flow leaf of the present invention and amplifies cross-sectional schematic;
Fig. 6 shows a certain structural representation of axial-flow leaf Leaf of axial-flow leaf of the present invention, wherein, shows two kinds of possible groove shapes; And
Fig. 7 shows another structural representation of axial-flow leaf of the present invention, wherein, shows the comparison structure of groove location.
Embodiment
Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
As shown in Figure 1, the invention provides a kind of axial-flow leaf, comprise wheel hub 20 and the identical blade 10 of a plurality of structures being arranged on vertically in wheel hub 20 peripheries, preferably, a plurality of blades 10 are arranged in wheel hub 20 peripheries equably.The present invention offers groove 11 on blade 10 positions of suction surface 12 near leading edge.Preferably, the elongated slot that the bearing of trend that groove 11 is the leading edge along blade 10 suction surfaces 12 extends.
As shown in Figure 2, A-A be take the rotating center circular arc drawn as the center of circle of fan blade to being depicted as, and the line between this circular arc and the frontier and rear of blade 10 is aerofoil profile chord length L.As shown in Figure 3 a and Figure 3 b shows, in axial-flow leaf of the present invention, the A/F W of groove 11
1be preferably 0.05≤W with the ratio of aerofoil profile chord length L
1/ L≤0.3.Groove 11 is preferably 0.1≤d/L≤0.5 with the ratio of aerofoil profile chord length L towards the front end of blade 10 leading edges to the circumferential distance d of blade 10 leading edges.As shown in Figure 4, in axial-flow leaf of the present invention, wheel hub 20 radius Rs
0with fan blade radius R
3ratio be preferably 0.2≤R
0/ R
3≤ 0.3, more electedly, R
0/ R
3=0.25.Groove 11 is apart from the beeline R at wheel hub 20 centers
1with fan blade radius R
3ratio be preferably 0.25≤R
1/ R
3≤ 0.5.Groove 11 is apart from the longest distance R at wheel hub 20 centers
2with fan blade radius R
3ratio be preferably 0.5≤R
2/ R
3≤ 1.0.
It is linear that the contour shape of the cross section of further groove 11 of the present invention can be connected in sequence by curve and/or straight line, for example, F shape as shown in Figure 5, trapezoidal D, taper E, rectangle G etc., also can be that single curve forms, such as circular arc C as shown in Figure 5, parabola shaped etc.Wherein trapezoidal D is preferably isosceles trapezoid, and preferably, the A/F W of trapezoidal D
1be greater than the width W of bottom surface
2, the acute angle becoming between the sidewall of groove 11 and bottom surface is 90 ° of 10 °≤θ <.As shown in Fig. 3 a and 3b, the height h of groove 11
1thickness h with blade 10 with groove 11 corresponding positions
2ratio be preferably 0 < h
1/ h
2≤ 0.4.Groove 11 longitudinal cross-section in the present invention can be crescent shape, the ring as shown in Q in Fig. 6, the shape being formed by connecting by many straight lines as shown in P in Fig. 6 or other shape.
Axial-flow leaf in the present invention, the concrete data in a certain embodiment are as shown in the table:
As shown above, the air quantity producing when axial-flow leaf of the present invention is 6304m
3/ h, the air quantity that axial-flow leaf of the prior art produces is 6178m
3during/h, the noise content of the two generation is close; The air quantity producing when axial-flow leaf of the present invention is 6160m
3/ h, the air quantity that axial-flow leaf of the prior art produces is 6178m
3during/h, the noise that the present invention produces is than few 1.07dB (A) in prior art, that is, axial-flow leaf of the present invention has the effect of good reduction noise with respect to prior art.
In addition, as shown above, when groove 11 position is arranged at as shown in S in Fig. 7 position, the production of its air quantity and noise is close with axial-flow leaf of the prior art, that is, and and when groove 11 is arranged at position shown in S, its effect that reduces noise is poor, therefore, the present invention preferably, is arranged on suction surface 12 groove 11 near on the position of leading edge.
The present invention also provides a kind of air-conditioning, has axial-flow blower, and axial-flow blower has axial-flow leaf, and this axial-flow leaf is above-mentioned axial-flow leaf.
From above description, can find out, axial-flow leaf in the present invention has been offered groove 11 near on the position of its leading edge on its blade 10 suction surfaces 12,, ensureing that blade 10 pressure side 13 molded line are constant in the situation that, by suction surface 12, to pressure side 13, caved in, thereby changed the type of flow of the air-flow of the fan blade of flowing through, producing method and the mode that comes off in fan blade suction surface 12 whirlpools have been improved, thereby improved blower fan efficiency, reduced the whirlpool noise of fan blade, and then reached the effect that reduces fan blade noise total value and fan blade power.Meanwhile, because groove 11 is realized by excision blade 10 materials, and then reached the effect that reduces fan blade cost.
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.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. an axial-flow leaf, comprise wheel hub (20) and the identical blade (10) of a plurality of structures being arranged on vertically in described wheel hub (20) periphery, it is characterized in that, described blade (10) suction surface (12) offers groove (11) near on the position of leading edge.
2. axial-flow leaf according to claim 1, is characterized in that, the elongated slot that the bearing of trend that described groove (11) is the leading edge along described blade (10) suction surface (12) extends.
3. axial-flow leaf according to claim 1, is characterized in that, described wheel hub (20) radius R
0with fan blade radius R
3ratio be 0.2≤R
0/ R
3≤ 0.3.
4. axial-flow leaf according to claim 1, is characterized in that, the beeline R at described groove (11) distance described wheel hub (20) center
1with fan blade radius R
3ratio be 0.25≤R
1/ R
3≤ 0.5.
5. according to the axial-flow leaf described in claim 1 or 4, it is characterized in that the longest distance R at described groove (11) distance described wheel hub (20) center
2with fan blade radius R
3ratio be 0.5≤R
2/ R
3≤ 1.0.
6. axial-flow leaf according to claim 1, is characterized in that, the A/F W of described groove (11)
1with the ratio of aerofoil profile chord length L be 0.05≤W
1/ L≤0.3.
7. axial-flow leaf according to claim 1, it is characterized in that, the front end towards described blade (10) leading edge of described groove (11) the extremely circumferential distance d of described blade (10) leading edge is 0.1≤d/L≤0.5 with the ratio of described aerofoil profile chord length L.
8. axial-flow leaf according to claim 1, is characterized in that, one of the cross-sectional profiles of described groove (11) is following form:
Circular arc;
Parabola shaped, or
What by straight line and/or curve, be connected in sequence is linear.
9. axial-flow leaf according to claim 8, is characterized in that, the cross section of described groove (11) is trapezoidal.
10. axial-flow leaf according to claim 9, is characterized in that, the width W of described groove (11) opening end
1be greater than the width W of bottom surface
2, the acute angle becoming between the sidewall of described groove (11) and bottom surface is 90 ° of 10 °≤θ <.
11. axial-flow leafs according to claim 1, is characterized in that, the height h of described groove (11)
1thickness h with described blade (10) with described groove (11) corresponding position
2ratio be 0 < h
1/ h
2≤ 0.4.
12. 1 kinds of air-conditionings, have axial-flow leaf, it is characterized in that, described axial-flow leaf is the axial-flow leaf described in any one in claim 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210219879.XA CN103511340B (en) | 2012-06-28 | 2012-06-28 | Axial-flow leaf and comprise the air-conditioning of this axial-flow leaf |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210219879.XA CN103511340B (en) | 2012-06-28 | 2012-06-28 | Axial-flow leaf and comprise the air-conditioning of this axial-flow leaf |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103511340A true CN103511340A (en) | 2014-01-15 |
| CN103511340B CN103511340B (en) | 2016-03-02 |
Family
ID=49894604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210219879.XA Active CN103511340B (en) | 2012-06-28 | 2012-06-28 | Axial-flow leaf and comprise the air-conditioning of this axial-flow leaf |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103511340B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020052220A1 (en) * | 2018-09-14 | 2020-03-19 | 广东美的制冷设备有限公司 | Axial flow fan and air conditioner |
| WO2020073478A1 (en) * | 2018-10-08 | 2020-04-16 | 中山市特斯拉克磁电科技有限公司 | Novel fan blade, tail fin and fan structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07158591A (en) * | 1993-12-09 | 1995-06-20 | Matsushita Electric Ind Co Ltd | Blower impeller |
| JPH0842497A (en) * | 1994-07-28 | 1996-02-13 | Matsushita Electric Ind Co Ltd | Impeller of axial flow blower |
| JPH08240197A (en) * | 1995-03-03 | 1996-09-17 | Daikin Ind Ltd | Axial-flow fan |
| CN2864168Y (en) * | 2005-12-26 | 2007-01-31 | 海信集团有限公司 | Tube-axial fan |
| CN201517513U (en) * | 2009-09-14 | 2010-06-30 | 青岛国恩科技发展有限公司 | Axial-flow fan and outdoor unit of air conditioner with same |
| CN202659571U (en) * | 2012-06-28 | 2013-01-09 | 珠海格力电器股份有限公司 | Axial-flow fan blade and air conditioner comprising axial-flow fan blades |
-
2012
- 2012-06-28 CN CN201210219879.XA patent/CN103511340B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07158591A (en) * | 1993-12-09 | 1995-06-20 | Matsushita Electric Ind Co Ltd | Blower impeller |
| JPH0842497A (en) * | 1994-07-28 | 1996-02-13 | Matsushita Electric Ind Co Ltd | Impeller of axial flow blower |
| JPH08240197A (en) * | 1995-03-03 | 1996-09-17 | Daikin Ind Ltd | Axial-flow fan |
| CN2864168Y (en) * | 2005-12-26 | 2007-01-31 | 海信集团有限公司 | Tube-axial fan |
| CN201517513U (en) * | 2009-09-14 | 2010-06-30 | 青岛国恩科技发展有限公司 | Axial-flow fan and outdoor unit of air conditioner with same |
| CN202659571U (en) * | 2012-06-28 | 2013-01-09 | 珠海格力电器股份有限公司 | Axial-flow fan blade and air conditioner comprising axial-flow fan blades |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020052220A1 (en) * | 2018-09-14 | 2020-03-19 | 广东美的制冷设备有限公司 | Axial flow fan and air conditioner |
| WO2020073478A1 (en) * | 2018-10-08 | 2020-04-16 | 中山市特斯拉克磁电科技有限公司 | Novel fan blade, tail fin and fan structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103511340B (en) | 2016-03-02 |
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| C14 | Grant of patent or utility model | ||
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