CN203051219U - Novel axial fan used for air-conditioner outdoor unit - Google Patents
Novel axial fan used for air-conditioner outdoor unit Download PDFInfo
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- CN203051219U CN203051219U CN 201320013606 CN201320013606U CN203051219U CN 203051219 U CN203051219 U CN 203051219U CN 201320013606 CN201320013606 CN 201320013606 CN 201320013606 U CN201320013606 U CN 201320013606U CN 203051219 U CN203051219 U CN 203051219U
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- trailing edge
- axial fan
- conditioner outdoor
- fan
- flabellum
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Abstract
The utility model provides a novel axial fan used for an air-conditioner outdoor unit. The novel axial fan used for the air-conditioner outdoor unit comprises a hub and at least two fan blades which are arranged on the hub. The novel axial fan used for the air-conditioner outdoor unit is characterized in that the tail edge of each fan blade is provided with a small tail edge guide vane which extends backwards. Due to the adoption of the structure of arranging the small tail edge guide vane which extends backwards on the tail edge of the fan blade, wake impact between the fan blades and the fixed downstream components is effectively reduced, flow losses are reduced, and energy conservation is benefited. Meanwhile, a flowing distance of airflow on the fan blades changes, paces of vortex shedding are different, therefore noises which are radiated outwards by noise sources on the surfaces of the fixed downstream components produce phase differences, a goal of reducing the noises is achieved, aerodynamic performance of the fan blades is also improved, and the problems that when an existing axial fan runs, jet flow wake impacts the fixed downstream components, the existing axial fan is not in favor of energy consumption, and the noises are loud are effectively solved.
Description
Technical field
The utility model relates to field of air conditioning, particularly the novel axial fan of a kind of air conditioner outdoor machine.
Background technique
Present air conditioner outdoor machine axial fan as shown in Figure 5, comprises wheel hub 1 ＇, is positioned at flabellum 2 ＇ on wheel hub 1 ＇, and flabellum 2 ＇ comprise leading edge 3 ＇, pressure side, suction surface 5 ＇ and trailing edge 6 ＇.And the flabellum trailing edge is continually varying arc transition shape structure.Air-flow is through the flabellum leading edge, acting by the flabellum blade face, flow out from the trailing edge position, this flabellum deficiency in use is: (1) pressure side airspeed height, and the suction surface airspeed is low, and the difference of both flow velocitys has caused the jet tail, this tail is to the downstream fixed element, as grid, caused impact, be unfavorable for energy-conservation; (2) blade trailing edge has produced vortex and has come off, and vortex shedding frequency makes fixed element surface, flabellum downstream produce strong alternate pulsation along the radially-arranged conformity of flabellum, thereby has produced strong interaction noise.
Summary of the invention
The purpose of this utility model is at above-mentioned existing problems and deficiency, provides a kind of and both can effectively improve the flabellum aeroperformance, can effectively reduce the fan aerodynamic noise again and reduce whole loss, and use the novel axial fan of energy-conservation air conditioner outdoor machine.
The technical solution of the utility model is achieved in that
The novel axial fan of air conditioner outdoor machine described in the utility model comprises wheel hub, is positioned at least two flabellums on the wheel hub, is characterized in that the trailing edge of described flabellum is provided with the little stator of the trailing edge that extends back.
For making the passage even variation near flabellum outer rim and the formation of the little stator of trailing edge outer end, to be conducive to the reaching equally distributed purpose of outlet velocity in this zone, the little stator of above-mentioned trailing edge is pre-large post-small contraction-like blade structure, and the outer rim of this blade does in the arc-shaped or oblique line shape structure, lining edge are made rectilinear structure.Because the little stator of trailing edge outer end makes arc transition or oblique line shape, and in edge make rectilinear structure, make the little stator of whole trailing edge be contraction structure at flow direction, also be conducive to reduce the little stator of trailing edge to the viscosity loss of air-flow.
For make the utility model can reach reduce noise and improve the purpose of flabellum aeroperformance in, simple in structure again, process simple and easyly, the trailing edge of the little stator of above-mentioned trailing edge is made rectilinear structure.
The particular location that is arranged on the flabellum trailing edge as for the little stator of trailing edge can come to decide as required.When the little stator of trailing edge is positioned on the flabellum trailing edge diverse location, though vortex shedding frequency is still consistent, but the little stator of trailing edge has changed the flabellum trailing edge vortex shedding time difference, thereby played the effect of phase modulation, make the noise source on fixed element surface, downstream produce phase difference to extraradial noise, reach the effect of offsetting part acoustic energy, reach the purpose that reduces noise.Be the scope in the tail whirlpool that further reduces axial fan, the radially perpendicular distance of the outer end of above-mentioned flabellum trailing edge and hub axis is greater than the outer rim of the little stator of trailing edge and the radially perpendicular distance of hub axis.Because the little stator of trailing edge shifts near certain distance inwards from the flabellum outer end, make the pressure side high velocity air increase energy to zone, tail whirlpool, thereby reach the scope that reduces the tail whirlpool and the purpose that reduces aerodynamic noise.
The wherein radially perpendicular distance R of the trailing edge outer end of the little stator of above-mentioned trailing edge and hub axis and flabellum D outer diameter
2Between ratio range be: R/D
2=0.3 ~ 1.0.Leading edge width B 1 and the flabellum D outer diameter of the little stator of above-mentioned trailing edge
2Ratio range be: B1/D
2=0.01 ~ 0.2; The trailing edge width B 2 of the little stator of described trailing edge with the ratio range of flabellum D outer diameter 2 is: B2/D
2=0.005 ~ 0.2.Inner end width L and the flabellum D outer diameter of the little stator of above-mentioned trailing edge
2Ratio range be: L/D
2=0.01 ~ 0.2.
The utility model is because the little guide vane structure of trailing edge that adopts the flabellum trailing edge setting at axial fan to extend back makes that the tail impact between flabellum and the downstream fixed element makes moderate progress, reduced flow losses, be conducive to energy-conservation; On the other hand, when air-flow produces vortex shedding at the flabellum trailing edge, the little stator of trailing edge that increases makes the mobile distance of air-flow on flabellum that variation take place, the step of vortex shedding also produces difference, be being out of step of vortex shedding frequency, thereby make the noise source on fixed element surface, downstream produce phase difference (briefly the little guide vane structure of Xin Zeng trailing edge has played the effect of conenser) to extraradial noise, reach the effect of offsetting part acoustic energy, thereby reach the purpose that reduces noise, simultaneously also improve the flabellum aeroperformance, the jet tail impacts to the downstream fixed element when having solved existing axial fan operation effectively, be unfavorable for energy-conservation and problem such as noise is big.And the utility model is simple in structure, processing is simple and easy, can be widely used in various chambers and transfers.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is the utility model one embodiment's structural representation.
Fig. 2 is the side view of flabellum among Fig. 1.
Fig. 3 is another embodiment's of the utility model structural representation.
Fig. 4 is the side view of flabellum among Fig. 3.
Fig. 5 is the structural representation of existing axial fan.
Embodiment
As Fig. 1-shown in Figure 4, the novel axial fan of air conditioner outdoor machine described in the utility model, comprise wheel hub 1, be positioned at least two flabellums 2 on the wheel hub 1, each flabellum 2 comprises leading edge 3, pressure side 4, suction surface 5 and trailing edge 6, overall noise when moving in order effectively to reduce, the trailing edge 6 of described flabellum 2 is provided with the little stator 7 of the trailing edge that extends back.Owing to adopt such structure, make the tail impact between flabellum 2 and the downstream fixed element make moderate progress, thereby flow losses have been reduced, on the other hand, little stator 7 structures of trailing edge have played the effect of conenser, because air-flow produces vortex shedding at flabellum 2 trailing edges 6 places, increased the little stator 7 of trailing edge, make the variation that the mobile distance of air-flow on flabellum 2 takes place, the step of vortex shedding also produces difference, thereby has played the effect of phase modulation, makes the noise source on fixed element surface, downstream produce phase difference to extraradial noise, reach the effect of offsetting part acoustic energy, to reach the purpose that reduces noise.The preferred version of the little stator 7 of above-mentioned trailing edge is one-body molded with flabellum 2.Little stator 7 thickness of above-mentioned trailing edge are general identical with flabellum 2 trailing edges 6 thickness.Because flabellum 2 is in running, suction surface 5 unavoidably will produce flow separation, because the differential pressure action between pressure side 4 and the suction surface 5, flabellum 2 outer rims will produce the gap eddy current, this gap eddy current mixes with suction surface 5 separated flows, because the whirlpool, gap is low speed flow, the effect in whirlpool, gap will make suction surface 5 separated regions increase, cause the zone, tail whirlpool near flabellum 2 outer fringe positions to increase, thereby caused loss and noise.In order further to reduce this tail whirlpool, as Fig. 1-shown in Figure 4, the utility model adopts the little stator 7 of trailing edge as pre-large post-small contraction-like blade structure, and the outer rim of this blade does in the arc-shaped or oblique line shape structure, lining edge are made rectilinear structure.Because arc transition or oblique line shape are made in the little stator of trailing edge 7 outer ends, and 7 li edge of the little stator of trailing edge are made rectilinear structure, on flow direction, stator is shaped as contraction structure, arrange the passage even variation that can make on the one hand near flabellum 2 outer rims and the formation of the little stator of trailing edge 7 outer ends like this, be conducive to reach the equally distributed purpose of outlet velocity in this zone, on the other hand, whole stator is contraction structure at flow direction, is conducive to reduce the viscosity loss of 7 pairs of air-flows of the little stator of trailing edge.Can according to circumstances decide as for the particular location that the little stator 7 of trailing edge is arranged on flabellum 2 trailing edges 6.When the little stator 7 of trailing edge is positioned on flabellum 2 trailing edges 6 diverse location, though vortex shedding frequency is still consistent, but the little stator 7 of trailing edge has changed the 2 trailing edge vortex shedding time differences of flabellum, thereby played the effect of phase modulation, make the noise source on fixed element surface, downstream produce phase difference to extraradial noise, play the effect of offsetting part acoustic energy, reach the purpose that reduces noise.Shown in Fig. 1-2, the little stator 7 of above-mentioned trailing edge can be directly arranged in the place, outer end of flabellum 2 trailing edges, and little stator 7 outer rims of trailing edge and flabellum 2 outer rims connected and formed continually varying arc transition shape structure this moment; In order further to reduce tail whirlpool scope, as Fig. 3-shown in Figure 4, the radially perpendicular distance of the outer end of above-mentioned flabellum trailing edge 7 and wheel hub 1 axis is greater than the outer rim of the little stator 7 of trailing edge and the radially perpendicular distance of wheel hub 1 axis.That is to say little stator 7 structures of trailing edge are arranged on flabellum 2 trailing edges near the position of outer end that namely the shift-in certain distance inwards from the outer end makes pressure side 4 high velocity airs increase energy to zone, tail whirlpool, thereby reduces the scope in tail whirlpool.For make the utility model can reach reduce noise and improve the purpose of flabellum aeroperformance in, simple in structure again, process simple and easyly, the trailing edge of the little stator 7 of above-mentioned trailing edge is made rectilinear structure.Wherein, the size of the little stator 7 of above-mentioned trailing edge on axial fan is: the trailing edge outer end of the little stator 7 of trailing edge and wheel hub 1 radial axis perpendicular distance R and fan D outer diameter
2Between ratio range be: R/D
2=0.3 ~ 1.0.Preferred value is R/D
2=0.5 ~ 0.8.Leading edge width B 1 and the fan D outer diameter of the little stator 7 of above-mentioned trailing edge
2Ratio range be: B1/D
2=0.01 ~ 0.2; The trailing edge width B 2 of the little stator 7 of described trailing edge with the ratio range of fan D outer diameter 2 is: B2/D
2=0.005 ~ 0.2.Inner end width L and the fan D outer diameter of the little stator 7 of above-mentioned trailing edge
2Ratio range be: L/D
2=0.01 ~ 0.2.Wherein the preferred value of above-mentioned each ratio range is: B1/D
2=0.03 ~ 0.12, B2/D
2=0.01 ~ 0.09.L/D
2=0.06~0.16。
The little stator 7 of trailing edge in the utility model has improved the impact between flabellum 2 and the downstream fixed element, make flabellum 2 trailing edge vortex shedding frequencies produce phase difference simultaneously, played the purpose that reduces noise, improves the flabellum aeroperformance, and the utility model is simple in structure, process simple and easyly, can be widely used in various chambers and transfer.
Table 1 provides the laboratory data of prior art and the utility model technology (new technology), and new technology has adopted R/D
2=0.8, B1/D
2=0.075, B2/D
2=0.07, L/D
2The little guide vane structure of=0.082 trailing edge.
The experiment of table 1 prior art and new technology relatively
| Scheme | Noise (dB) | Air quantity (m 3/h) | Rotating speed (r/min) | Power (W) |
| Prior art | 50.6 | 1613 | 904 | 49 |
| New technology | 48.5 | 1630 | 890 | 50 |
As can be seen from the above table, new technology is conducive to reduce noise and improves air quantity.
Although the utility model is to describe with reference to specific embodiment, this description and not meaning that is construed as limiting the utility model.With reference to description of the present utility model, other of the disclosed embodiments change, and all can expect for those skilled in the art, and this variation should belong in the affiliated claim institute restricted portion.
Claims (10)
1. the novel axial fan of air conditioner outdoor machine comprises wheel hub (1), is positioned at least two flabellums (2) on the wheel hub (1), it is characterized in that the trailing edge (6) of described flabellum (2) is provided with the little stator of the trailing edge that extends back (7).
2. the novel axial fan of air conditioner outdoor machine according to claim 1 is characterized in that the little stator of above-mentioned trailing edge (7) is pre-large post-small contraction-like blade structure, and the outer rim of this blade does in the arc-shaped or oblique line shape structure, lining edge are made rectilinear structure.
3. the novel axial fan of air conditioner outdoor machine according to claim 1 and 2 is characterized in that the trailing edge of the little stator of above-mentioned trailing edge (7) is made rectilinear structure.
4. the novel axial fan of air conditioner outdoor machine according to claim 1 is characterized in that the little stator of above-mentioned trailing edge (7) thickness is identical with flabellum (2) trailing edge (6) thickness.
5. the novel axial fan of air conditioner outdoor machine according to claim 1 is characterized in that the outer end of above-mentioned flabellum trailing edge (7) and the radially perpendicular distance of wheel hub (1) axis are greater than the outer rim of the little stator of trailing edge (7) and the radially perpendicular distance of wheel hub (1) axis.
6. the novel axial fan of air conditioner outdoor machine according to claim 1 is characterized in that the trailing edge outer end of the little stator of above-mentioned trailing edge (7) and radially perpendicular distance R and the fan D outer diameter of wheel hub (1) axis
2Between ratio range be: R/D
2=0.3 ~ 1.0.
7. the novel axial fan of air conditioner outdoor machine according to claim 1 is characterized in that the leading edge width B 1 and fan D outer diameter of the little stator of above-mentioned trailing edge (7)
2Ratio range be: B1/D
2=0.01 ~ 0.2; The trailing edge width B 2 of the little stator of described trailing edge (7) with the ratio range of fan D outer diameter 2 is: B2/D
2=0.005 ~ 0.2.
8. the novel axial fan of air conditioner outdoor machine according to claim 7 is characterized in that above-mentioned B1/D
2=0.03 ~ 0.12, B2/D
2=0.01 ~ 0.09.
9. the novel axial fan of air conditioner outdoor machine according to claim 1 is characterized in that inner end width L and the fan D outer diameter of the little stator of above-mentioned trailing edge (7)
2Ratio range be: L/D
2=0.01 ~ 0.2.
10. the novel axial fan of air conditioner outdoor machine according to claim 9 is characterized in that above-mentioned L/D
2=0.06 ~ 0.16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320013606 CN203051219U (en) | 2013-01-11 | 2013-01-11 | Novel axial fan used for air-conditioner outdoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320013606 CN203051219U (en) | 2013-01-11 | 2013-01-11 | Novel axial fan used for air-conditioner outdoor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051219U true CN203051219U (en) | 2013-07-10 |
Family
ID=48734177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320013606 Expired - Fee Related CN203051219U (en) | 2013-01-11 | 2013-01-11 | Novel axial fan used for air-conditioner outdoor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051219U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016401A (en) * | 2013-01-11 | 2013-04-03 | 广东顺威精密塑料股份有限公司 | Novel axial fan for air-conditioner outdoor unit |
| CN105927586A (en) * | 2016-06-03 | 2016-09-07 | 华中科技大学 | Modified open-type axial flow fan blade and modification method thereof |
| CN111271319A (en) * | 2019-01-07 | 2020-06-12 | 奥克斯空调股份有限公司 | Axial flow fan blade and air conditioner |
-
2013
- 2013-01-11 CN CN 201320013606 patent/CN203051219U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016401A (en) * | 2013-01-11 | 2013-04-03 | 广东顺威精密塑料股份有限公司 | Novel axial fan for air-conditioner outdoor unit |
| CN103016401B (en) * | 2013-01-11 | 2015-07-01 | 广东顺威精密塑料股份有限公司 | Novel axial fan for air-conditioner outdoor unit |
| CN105927586A (en) * | 2016-06-03 | 2016-09-07 | 华中科技大学 | Modified open-type axial flow fan blade and modification method thereof |
| CN105927586B (en) * | 2016-06-03 | 2018-05-11 | 华中科技大学 | The Start-stop control leaf and its modified method of a kind of remodeling |
| CN111271319A (en) * | 2019-01-07 | 2020-06-12 | 奥克斯空调股份有限公司 | Axial flow fan blade and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20210111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |