CN207093453U - Axial-flow leaf and there is its blower fan and air-conditioner outdoor unit - Google Patents
Axial-flow leaf and there is its blower fan and air-conditioner outdoor unit Download PDFInfo
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- CN207093453U CN207093453U CN201720671980.7U CN201720671980U CN207093453U CN 207093453 U CN207093453 U CN 207093453U CN 201720671980 U CN201720671980 U CN 201720671980U CN 207093453 U CN207093453 U CN 207093453U
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- flow leaf
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Abstract
It the utility model is related to a kind of axial-flow leaf and there is its blower fan and air-conditioner outdoor unit, axial-flow leaf includes central axle sleeve (1) and the circumferential multiple blades (2) being distributed on central axle sleeve (1) periphery wall, each blade (2) is respectively provided with suction surface (3) and pressure face (4), it is characterised in that：A cowling panel (5) is equipped with suction surface (3) at described each blade (2) trailing edge, there are gap (6) between the cowling panel (5) and blade (2), the gap (6) of cowling panel (5) edge is more than the gap (6) at cowling panel (5) trailing edge；Blower fan includes motor and above-mentioned axial-flow leaf；Air-conditioner outdoor unit includes above-mentioned blower fan.The utility model has the advantages that：It is simple in construction, it is easily manufactured, and be not only able to improve rectification effect, and can effectively reduce eddy current crack.
Description
Technical field
It the utility model is related to fan blade, specifically a kind of axial-flow leaf and there is its blower fan and air-conditioner outdoor unit.
Background technology
Air-conditioner outdoor unit is generally using axial-flow leaf as its thermal component, and at present, existing axial-flow leaf typically wraps
Include central axle sleeve and the circumferential multiple blades being distributed on central axle sleeve periphery wall.Axial-flow leaf can produce whirlpool in rotary course
Flow noise, main cause be axial-flow leaf when rotated, larger pressure differential be present between the pressure face and suction surface of blade, from
And when the air-flow for flowing through blade pressure surface and the air-flow for flowing through blade suction surface cross at the trailing edge of blade, pressure face high pressure
Air-flow flows toward low pressure, produces backflow so that the air-flow at the trailing edge of blade produces air-flow vortex, and then causes eddy current crack
Generation.Axial-flow leaf on the market obtains certain effect in terms of eddy current crack is reduced at present, but these axle stream wind
Caused eddy current crack is still larger when rotated for leaf.
Utility model content
First technical problem to be solved in the utility model be to provide it is a kind of simple in construction, it is easily manufactured, and not only can
Rectification effect is enough improved, and can effectively reduce the axial-flow leaf of eddy current crack.
Second technical problem to be solved in the utility model is to provide a kind of blower fan with above-mentioned axial-flow leaf.
3rd technical problem to be solved in the utility model is to provide a kind of air conditioner chamber with above-mentioned axial-flow leaf
Outer machine.
To solve first technical problem, the utility model provides a kind of axial-flow leaf of following structure：Including center
Axle sleeve and the circumferential multiple blades being distributed on central axle sleeve periphery wall, each blade are respectively provided with suction surface and pressure face, wherein,
A cowling panel is equipped with the suction surface of each blade trailing edge, there is gap, cowling panel leading edge between cowling panel and blade
The gap at place is more than the gap at cowling panel trailing edge.
Axial-flow leaf described in the utility model, wherein, the bending curvature of cowling panel and the bending curvature of blade trailing edge
It is identical.
Axial-flow leaf described in the utility model, wherein, cowling panel is connected on blade by least one support column.
Axial-flow leaf described in the utility model, wherein, cowling panel, blade and the support for connecting cowling panel and blade
Post is integral.
Axial-flow leaf described in the utility model, wherein, cowling panel is evenly equipped with multiple on the surface of blade suction surface
Blind hole.
Axial-flow leaf described in the utility model, wherein, the depth of blind hole is the 2/5~3/5 of rectification plate thickness.
Axial-flow leaf described in the utility model, wherein, the width of cowling panel is 5~20mm.
Axial-flow leaf described in the utility model, wherein, the thickness of cowling panel is 2~5mm.
Axial-flow leaf described in the utility model, wherein, the distance in gap is 6~7.5mm.
Axial-flow leaf described in the utility model, wherein, the edge of cowling panel facilitates the filleted transition of gap air intake.
To solve second technical problem, the utility model provides a kind of blower fan of following structure：Including motor and upper
The axial-flow leaf stated.
To solve the 3rd technical problem, the utility model provides a kind of air-conditioner outdoor unit of following structure：Including
Above-mentioned blower fan.
After said structure, compared with prior art, the utility model has advantages below：After cowling panel is set, when
Plate can be rectified by flowing through when the air-flow of blade suction surface reaches blade trailing edge is separated into two layers up and down, due to cowling panel edge
Gap be more than gap at cowling panel trailing edge, therefore the air-flow flowed through from lower floor's (gap location i.e. between cowling panel and blade)
Through can be compressed during gap, so that its pressure increases, and then when itself and trailing edge of the air-flow in blade for flowing through blade pressure surface
When place crosses, the pressure differential at trailing edge can be reduced, prevents pressure face air-flow from being flowed back toward suction surface, so as to alleviate blade tail significantly
Vortex at edge, reach the purpose for reducing eddy current crack；In addition, the air-flow meeting flowed through from upper strata (i.e. cowling panel suction surface side)
Gentle outflow after rectified plate rectification, so as to improve the speed of air-flow and flow direction, is effectively reduced because air-flow and fan blade are led
Stream device (generally referring to kuppe) collides and causes the situation of next blade air movement disorder to occur, and reduces the fan blade cycle
Property rotational noise while make air-out gentler smooth, heightened the rectification effect of axial-flow leaf；Moreover, the utility model institute
The axial-flow leaf stated is only to add rectification harden structure on each blade in the structure of original fan blade, thus need not pair
Original fan blade is retrofited, not only simple in construction, and easily manufactured.
Brief description of the drawings
Fig. 1 is the stereochemical structure appearance schematic diagram of axial-flow leaf described in the utility model；
Fig. 2 is the enlarged drawing of part A in Fig. 1.
Embodiment
To the utility model axial-flow leaf and there is its blower fan and air conditioner with reference to the accompanying drawings and detailed description
Outdoor unit is described in further detail.
As depicted in figs. 1 and 2, the utility model provides a kind of axial-flow leaf, including central axle sleeve 1 is distributed on circumferential
Multiple blades 2 on the periphery wall of central axle sleeve 1, each blade 2 are respectively provided with suction surface 3 and pressure face 4, at each trailing edge of blade 2
Suction surface 3 on be equipped with a cowling panel 5, there is gap 6, the gap 6 of the edge of cowling panel 5 between cowling panel 5 and blade 2
More than the gap 6 at the trailing edge of cowling panel 5；The bending curvature of cowling panel 5 is identical with the bending curvature at the trailing edge of blade 2, so not
But the design of cowling panel 5 can be greatly facilitated, and can also further improve the rectification effect of whole axial-flow leaf and reduce whirlpool
Flow noise effect；Cowling panel 5 is connected on blade 2 by least one support column 7, and the effect one of support column 7 is to be used to connect
Cowling panel 5 and blade 2 are connect, another is the structural strength for ensureing cowling panel 5, it is not produced in axial-flow leaf rotary course
Raw deformation, so as to ensure the rectification effect of whole axial-flow leaf and reduce eddy current crack effect, the number of support column 7 can be according to whole
Depending on the length of flowing plate 5, if blade 2 is smaller, cowling panel 5 is shorter, the number of support column 7 can be only one, Ruo Dangye
When piece 2 is larger, cowling panel 5 is longer, the number of support column 7 can accordingly increase to two, three or more, and all supports
Post 7 is preferably uniformly distributed on the length direction of cowling panel 5；Cowling panel 5, blade 2 and the branch for connecting cowling panel 5 and blade 2
Dagger 7 is integral, so that without using other fixed structures again between cowling panel 5, blade 2 and support column 7, so as to big
The big design and manufacture for being easy to axial-flow leaf described in the utility model；Cowling panel 5 is on the surface of the suction surface 3 of blade 2
Multiple blind holes 8 are evenly equipped with, so as to add the roughness of cowling panel 5, so when axial-flow leaf rotates, can be produced at blind hole 8
Turbulent flow, the airflow field of axial-flow leaf is changed at cowling panel 5, it is too fast and produce boundary layer to effectively prevent air velocity
Separation, and by by the rotational noise frequency dispersion of relatively-stationary axial-flow leaf originally into broader wavelength coverage, and axle stream
Energy entrained by fan blade dominant frequency is then further weakened, and then effectively reduces the rotational noise of axial-flow leaf；The depth of blind hole 8
Spend for the 2/5~3/5 of the thickness of cowling panel 5, preferably 1/2, when cowling panel 5 is thicker, the depth of blind hole 8 can suitably reduce, and
When cowling panel 5 is relatively thin, the depth of blind hole 8 can suitably increase, the purpose for the arrangement is that in order to ensure that the depth of blind hole 8 will not be too
It is shallow, so as to ensure that axial-flow leaf reduces the effect of rotational noise；5~20mm of width of cowling panel 5, preferably 6mm, 12mm,
18mm, the width of cowling panel 5 select this scope, and axial-flow leaf can be made to reach the purpose for reducing eddy current crack, and can also
Ensure the rectified action of cowling panel 5, and in the width selection of cowling panel 5, then it is the width of cowling panel 5 when blade 2 is larger
Also should be larger, and when blade 2 is smaller, the width of cowling panel 5 also should be smaller；The thickness of cowling panel 5 is 2~5mm, is preferably
2.5mm, 3.5mm, 4.5mm, the thickness of cowling panel 5 select this scope, in order to ensure the structural strength of cowling panel 5,
It is set not produce deformation in axial-flow leaf rotary course, so as to ensure the rectification effect of whole axial-flow leaf and reduce to be vortexed
Noise effects, and in the thickness selection of cowling panel 5, then it is when blade 2 is larger, the thickness of cowling panel 5 also should be larger, and works as
When blade 2 is smaller, the thickness of cowling panel 5 also should be smaller；The distance in gap 6 is 6~7.5mm, preferably 6.2mm, 6.7mm,
7.2mm, the distance in gap 6 select this scope, axial-flow leaf can be made to reach the purpose for reducing eddy current crack, and can also protect
The rectified action of cowling panel 5 is demonstrate,proved, and in the distance selection in gap 6, be then when blade 2 is larger, the distance in gap 6 also should be compared with
Greatly, and when blade 2 is smaller, the distance in gap 6 also should be smaller；The edge of cowling panel 5 facilitates the chamfered transition of the air intake of gap 6
Section 9, the setting of filleted transition 9 can aid in cowling panel 5 and the air-flow for flowing through the suction surface 3 of blade 2 be increasingly introducing into seam
In gap 6, and then the pressure differential at the trailing edge of blade 2 can be further reduced, prevent the air-flow of 2 pressure face of blade 4 from being flowed back toward suction surface,
So as to alleviate the vortex at the trailing edge of blade 2 significantly, reach the purpose for reducing eddy current crack.
The utility model additionally provides a kind of blower fan, and it includes the axial-flow leaf in motor and above-described embodiment.
The utility model additionally provides a kind of air-conditioner outdoor unit, and it includes the blower fan in embodiment.
Embodiment above is only that preferred embodiment of the present utility model is described, not to the utility model
Scope be defined, on the premise of the utility model design spirit is not departed from, those of ordinary skill in the art are to this practicality
The various modifications and improvement that new technical scheme is made, the protection domain of the utility model claims book determination all should be fallen into
It is interior.
Suction surface air-flow is set to be separated into two layers by the effect of cowling panel, inferior airflow is increased pressure by by gap S, from
And reduce with the pressure difference of pressure face, prevent pressure suction surface cross at trailing edge due to pressure difference it is excessive caused by vortex come off noise；
Upper strata air-flow acts on by cowling panel, improves speed and the direction of air-flow, reduces crossing for different directions air-flow, makes air-out more flat
It is slow smooth.To sum up, the air-flow at suction surface trailing edge is separated two layers by cowling panel, handed over after lower floor's supercharging with pressure face air-flow
Converge, gentle outflow after the progress rectification of upper strata air-flow, so as to improve the noise of fan blade.By verification experimental verification, noise reduces 1.5dB
(A)。
Pressure difference at pressure face and suction surface trailing edge, controlled vortex flow noise are reduced by cowling panel bottom gap S；It is simultaneously whole
Flowing plate top planes to back pressure face air-flow carry out rectification, reduce trailing edge because air velocity direction differ caused by influence each other, from
And play a part of reducing the eddy current crack of axial-flow leaf trailing edge.
Main cause be axial-flow leaf when rotated, larger pressure differential be present between the pressure face and suction surface of blade,
So that when the air-flow for flowing through blade pressure surface and the air-flow for flowing through blade suction surface cross at the trailing edge of blade, the tail of blade
Air-flow at edge can produce air-flow vortex, and then cause the generation of eddy current crack.Axial-flow leaf on the market is reducing whirlpool at present
The aspect of flow noise obtains certain effect, but caused eddy current crack is still larger when rotated for these axial-flow leafs.
Claims (12)
1. a kind of axial-flow leaf, including central axle sleeve (1) and the circumferential multiple blades being distributed on central axle sleeve (1) periphery wall
(2), each blade (2) is respectively provided with suction surface (3) and pressure face (4), it is characterised in that：Described each blade (2) trailing edge
A cowling panel (5) is equipped with the suction surface (3) at place, there are gap (6) between the cowling panel (5) and blade (2), it is described
The gap (6) of cowling panel (5) edge is more than the gap (6) at cowling panel (5) trailing edge.
2. axial-flow leaf according to claim 1, it is characterised in that：The bending curvature of the cowling panel (5) and blade (2)
Bending curvature at trailing edge is identical.
3. axial-flow leaf according to claim 1, it is characterised in that：The cowling panel (5) passes through at least one support column
(7) it is connected on blade (2).
4. axial-flow leaf according to claim 1, it is characterised in that：The cowling panel (5), blade (2) and for connecting
The support column (7) of cowling panel (5) and blade (2) is integral.
5. axial-flow leaf according to claim 1, it is characterised in that：The cowling panel (5) is backwards to blade (2) suction surface
(3) multiple blind holes (8) are evenly equipped with surface.
6. axial-flow leaf according to claim 5, it is characterised in that：The depth of the blind hole (8) is cowling panel (5) thickness
2/5~3/5.
7. axial-flow leaf according to claim 1, it is characterised in that：The width of the cowling panel (5) is 5~20mm.
8. axial-flow leaf according to claim 1, it is characterised in that：The thickness of the cowling panel (5) is 2~5mm.
9. axial-flow leaf according to claim 1, it is characterised in that：The distance of the gap (6) is 6~7.5mm.
10. axial-flow leaf according to claim 1, it is characterised in that：The edge of the cowling panel (5) facilitates gap
(6) filleted transition (9) of air intake.
A kind of 11. blower fan, it is characterised in that：Including the axial-flow leaf described in any one in motor and claim 1 to 10.
A kind of 12. air-conditioner outdoor unit, it is characterised in that：Including the blower fan described in claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720671980.7U CN207093453U (en) | 2017-06-09 | 2017-06-09 | Axial-flow leaf and there is its blower fan and air-conditioner outdoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720671980.7U CN207093453U (en) | 2017-06-09 | 2017-06-09 | Axial-flow leaf and there is its blower fan and air-conditioner outdoor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207093453U true CN207093453U (en) | 2018-03-13 |
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ID=61552259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720671980.7U Active CN207093453U (en) | 2017-06-09 | 2017-06-09 | Axial-flow leaf and there is its blower fan and air-conditioner outdoor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207093453U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355424A (en) * | 2017-06-09 | 2017-11-17 | 奥克斯空调股份有限公司 | Axial-flow leaf and there is its blower fan and air-conditioner outdoor unit |
-
2017
- 2017-06-09 CN CN201720671980.7U patent/CN207093453U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355424A (en) * | 2017-06-09 | 2017-11-17 | 奥克斯空调股份有限公司 | Axial-flow leaf and there is its blower fan and air-conditioner outdoor unit |
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