CN103511340B - Axial flow fan blade and air conditioner comprising same - Google Patents
Axial flow fan blade and air conditioner comprising same Download PDFInfo
- Publication number
- CN103511340B CN103511340B CN201210219879.XA CN201210219879A CN103511340B CN 103511340 B CN103511340 B CN 103511340B CN 201210219879 A CN201210219879 A CN 201210219879A CN 103511340 B CN103511340 B CN 103511340B
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- Prior art keywords
- axial
- flow leaf
- blade
- groove
- described groove
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- 238000004378 air conditioning Methods 0.000 claims description 7
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The invention provides an axial flow fan blade and an air conditioner comprising the same. The axial flow fan blade comprises a hub and a plurality of blades which are arranged on the periphery of the hub along the axial direction and have the same structure, and a groove is formed in the position, close to the front edge, of the suction surface of each blade. The invention sets a groove on the suction surface of the blade near the front edge to adjust the suction surface structure of the blade, thereby changing the air flow mode of the suction surface, improving the generation and falling mode of the vortex and finally achieving the purpose of reducing the noise.
Description
Technical field
The present invention relates to axial-flow blower technical field, in particular to a kind of axial-flow leaf and the air-conditioning comprising this axial-flow leaf.
Background technique
Axial-flow leaf is the vitals in air conditioner outdoor machine, and its noise performance directly can have influence on the overall performance of air conditioner.Therefore, how when ensureing air quantity, the noise reducing axial-flow leaf has become a difficult problem of air channel technical field of research.
At present, axial-flow leaf is in operation process, and edge suction surface surface in front of the blade, often produces whirlpool boundary layer separation, can produce eddy current simultaneously, along with coming off of whirlpool, just can produce corresponding vortical noise.The noise total value of axial-flow leaf so not only can be caused 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 when ensureing 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, comprise the blade that wheel hub is identical with the multiple structures be arranged on vertically in hub periphery, blade suction surface offers groove on the position of leading edge.
Further, groove is the elongated slot extended along the bearing of trend of the leading edge of blade suction surface.
Further, hub radius R
0with fan blade radius R
3ratio be 0.2≤R
0/ R
3≤ 0.3.
Further, the beeline R of groove distance hub centre
1with fan blade radius R
3ratio be 0.25≤R
1/ R
3≤ 0.5.
Further, the longest distance R of groove distance hub centre
2with fan blade radius R
3ratio be 0.5≤R
2/ R
3≤ 1.0.
Further, the A/F W of groove
1be 0.05≤W with the ratio of aerofoil profile chord length L
1/ L≤0.3.
Further, groove is 0.1≤d/L≤0.5 towards the front end of blade inlet edge to the circumferential distance d of blade inlet edge and the ratio of aerofoil profile chord length L.
Further, the cross-sectional profiles of groove is one of 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, between the sidewall of groove and bottom surface, formed acute angle is 10 °≤θ < 90 °.
Further, the height h of groove
1and the thickness h of 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, have 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 offering groove on blade suction surface on the position of leading edge, to adjust blade suction surface structure, and then change suction surface air current flow mode, improve the generation of eddy current and the mode that comes off, and finally reach the object reducing noise.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, 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 A-A cross-sectional schematic as shown in Figure 2 of axial-flow leaf of the present invention;
Fig. 3 b shows the close-up schematic view 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 partial enlargement cross-sectional schematic of the axial-flow leaf Leaf of axial-flow leaf of the present invention;
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
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
As shown in Figure 1, the invention provides a kind of axial-flow leaf, comprise the blade 10 that wheel hub 20 is identical with the multiple structures be arranged on vertically on wheel hub 20 periphery, preferably, multiple blade 10 is arranged on wheel hub 20 periphery equably.The present invention offers groove 11 at blade 10 suction surface 12 on the position of leading edge.Preferably, the elongated slot that extends for the bearing of trend of the leading edge along blade 10 suction surface 12 of groove 11.
As shown in Figure 2, A-A is to being depicted as with the circular arc of the rotating center of fan blade drawn by the center of circle, and the line between the frontier and rear of this circular arc and 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
10.05≤W is preferably with the ratio of aerofoil profile chord length L
1/ L≤0.3.Groove 11 is preferably 0.1≤d/L≤0.5 towards the front end of blade 10 leading edge to the circumferential distance d of blade 10 leading edge and the ratio of aerofoil profile chord length L.As shown in Figure 4, in axial-flow leaf of the present invention, wheel hub 20 radius R
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 center
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 center
2with fan blade radius R
3ratio be preferably 0.5≤R
2/ R
3≤ 1.0.
The contour shape of the cross section of further groove 11 of the present invention can by curve and/or straight line be connected in sequence linear, such as, F shape as shown in Figure 5, trapezoidal D, taper E, rectangle G etc., also can be that single curve is formed, 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, between the sidewall of groove 11 and bottom surface, formed acute angle is 10 °≤θ < 90 °.As best shown in figures 3 a and 3b, the height h of groove 11
1and the thickness h of blade 10 with groove 11 corresponding position
2ratio be preferably 0 < h
1/ h
2≤ 0.4.The longitudinal cross-section of the groove 11 in the present invention can be crescent shape, the ring as shown in Q in Fig. 6, the shape be 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 produced 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 two noise content produced is close; The air quantity produced 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, few 1.07dB (A) in the noise ratio prior art that the present invention produces, that is, axial-flow leaf of the present invention has the effect reducing noise preferably relative to prior art.
In addition, as shown above, when the position of groove 11 to be arranged in as Fig. 7 shown in S during position, the production of its air quantity and noise is close with axial-flow leaf of the prior art, that is, when groove 11 is arranged at position shown in S, its effect reducing noise is poor, therefore, groove 11 preferably, is arranged on the position of close leading edge on suction surface 12 by the present invention.
Present invention also offers a kind of air-conditioning, have axial-flow blower, 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 offered groove 11 on its blade 10 suction surface 12 on the position of its leading edge, namely, when ensureing that blade 10 pressure side 13 molded line is constant, caved in pressure side 13 by suction surface 12, thus change the type of flow of the air-flow flowing through fan blade, improve the producing method in fan blade suction surface 12 whirlpool and the mode that comes off, thus improve the efficiency of blower fan, reduce the whirlpool noise of fan blade, and then reach the effect reducing fan blade noise total value and fan blade power.Meanwhile, because groove 11 is realized by excision blade 10 material, and then the effect reducing fan blade cost is reached.
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 amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an axial-flow leaf, comprise the blade (10) that wheel hub (20) is identical with the multiple structures be arranged on vertically on described wheel hub (20) periphery, it is characterized in that, described blade (10) suction surface (12) offers groove (11) on the position of leading edge, the elongated slot that described groove (11) extends for the bearing of trend of the leading edge along described blade (10) suction surface (12), the front end towards described blade (10) leading edge of described groove (11) is 0.1≤d/L≤0.5 to the circumferential distance d of described blade (10) leading edge with the ratio of aerofoil profile chord length L.
2. 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.
3. axial-flow leaf according to claim 1, is characterized in that, described groove (11) is apart from the beeline R at described wheel hub (20) center
1with fan blade radius R
3ratio be 0.25≤R
1/ R
3≤ 0.5.
4. the axial-flow leaf according to claim 1 or 3, is characterized in that, described groove (11) is apart from the longest distance R at described wheel hub (20) center
2with fan blade radius R
3ratio be 0.5≤R
2/ R
3≤ 1.0.
5. axial-flow leaf according to claim 1, is characterized in that, the A/F W of described groove (11)
1be 0.05≤W with the ratio of aerofoil profile chord length L
1/ L≤0.3.
6. axial-flow leaf according to claim 1, is characterized in that, the cross-sectional profiles of described groove (11) is one of following form:
Circular arc;
Parabola shaped, or
By straight line and/or curve be connected in sequence linear.
7. axial-flow leaf according to claim 6, is characterized in that, the cross section of described groove (11) is trapezoidal.
8. axial-flow leaf according to claim 7, is characterized in that, the width W of described groove (11) opening end
1be greater than the width W of bottom surface
2, between the sidewall of described groove (11) and bottom surface, formed acute angle is 10 °≤θ < 90 °.
9. axial-flow leaf according to claim 1, is characterized in that, the height h of described groove (11)
1and the thickness h of described blade (10) with described groove (11) corresponding position
2ratio be 0 < h
1/ h
2≤ 0.4.
10. an air-conditioning, has axial-flow leaf, it is characterized in that, the axial-flow leaf of described axial-flow leaf according to any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210219879.XA CN103511340B (en) | 2012-06-28 | 2012-06-28 | Axial flow fan blade and air conditioner comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210219879.XA CN103511340B (en) | 2012-06-28 | 2012-06-28 | Axial flow fan blade and air conditioner comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103511340A CN103511340A (en) | 2014-01-15 |
| CN103511340B true 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 fan blade and air conditioner comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103511340B (en) |
Families Citing this family (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 |
| CN111005895A (en) * | 2018-10-08 | 2020-04-14 | 中山市特斯拉克磁电科技有限公司 | A new type of fan blade, tail and fan structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 same |
Family Cites Families (3)
| 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 fan |
-
2012
- 2012-06-28 CN CN201210219879.XA patent/CN103511340B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103511340A (en) | 2014-01-15 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |