CN107355424A - 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
- Publication number
- CN107355424A CN107355424A CN201710431930.6A CN201710431930A CN107355424A CN 107355424 A CN107355424 A CN 107355424A CN 201710431930 A CN201710431930 A CN 201710431930A CN 107355424 A CN107355424 A CN 107355424A
- Authority
- CN
- China
- Prior art keywords
- cowling panel
- axial
- blade
- flow leaf
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates 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.It is an advantage of the invention 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
The present invention relates 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.
The content of the invention
The invention solves first technical problem be to provide it is a kind of simple in construction, it is easily manufactured, and be not only able to carry
High rectification effect, and can effectively reduce the axial-flow leaf of eddy current crack.
The invention solves second technical problem be to provide a kind of blower fan with above-mentioned axial-flow leaf.
The invention solves the 3rd technical problem be to provide outside a kind of air conditioner chamber with above-mentioned axial-flow leaf
Machine.
To solve first technical problem, the invention provides a kind of axial-flow leaf of following structure：Including central axle sleeve
With the circumferential multiple blades being distributed on central axle sleeve periphery wall, each blade is respectively provided with suction surface and pressure face, wherein, each
A cowling panel is equipped with the suction surface of blade trailing edge, there is gap between cowling panel and blade, cowling panel edge
Gap is more than the gap at cowling panel trailing edge.
Axial-flow leaf of the present invention, wherein, the bending curvature of cowling panel is identical with the bending curvature of blade trailing edge.
Axial-flow leaf of the present invention, wherein, cowling panel is connected on blade by least one support column.
Axial-flow leaf of the present invention, wherein, cowling panel, blade and the support column for connecting cowling panel and blade are
One is overall.
Axial-flow leaf of the present invention, wherein, cowling panel is evenly equipped with multiple blind holes on the surface of blade suction surface.
Axial-flow leaf of the present invention, wherein, the depth of blind hole is the 2/5~3/5 of rectification plate thickness.
Axial-flow leaf of the present invention, wherein, the width of cowling panel is 5~20mm.
Axial-flow leaf of the present invention, wherein, the thickness of cowling panel is 2~5mm.
Axial-flow leaf of the present invention, wherein, the distance in gap is 6~7.5mm.
Axial-flow leaf of the present invention, wherein, the edge of cowling panel facilitates the filleted transition of gap air intake.
To solve second technical problem, the invention provides a kind of blower fan of following structure：Including motor and above-mentioned
Axial-flow leaf.
To solve the 3rd technical problem, the invention provides a kind of air-conditioner outdoor unit of following structure：Including above-mentioned
Blower fan.
After said structure, compared with prior art, the present invention has advantages below：After setting cowling panel, when flowing through
The air-flow of blade suction surface can be rectified plate and be separated into two layers up and down when reaching blade trailing edge, due between cowling panel edge
Gap is more than the gap at cowling panel trailing edge, therefore between the air-flow warp flowed through from lower floor's (gap location i.e. between cowling panel and blade)
It can be compressed during gap, so that its pressure increases, and then when it is handed over the air-flow for flowing through blade pressure surface at the trailing edge of blade
During remittance, 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 trailing edge significantly
Vortex, reach reduce eddy current crack purpose；In addition, the air-flow flowed through from upper strata (i.e. cowling panel suction surface side) can be through whole
Gentle outflow after flowing plate rectification, so as to improve the speed of air-flow and flow direction, it is effectively reduced because air-flow and fan blade water conservancy diversion fill
Put and (generally refer to kuppe) collision and cause the situation of next blade air movement disorder to occur, it is periodic to reduce fan blade
Make air-out gentler smooth while rotational noise, heighten the rectification effect of axial-flow leaf；Moreover, axle stream of the present invention
Fan blade is only to add rectification harden structure on each blade in the structure of original fan blade, therefore need not be to original fan blade
Retrofited, it is 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 of the present invention；
Fig. 2 is the enlarged drawing of part A in Fig. 1.
Embodiment
With reference to the accompanying drawings and detailed description to axial-flow leaf of the present invention and outside the blower fan with it and air conditioner chamber
Machine is described in further detail.
As depicted in figs. 1 and 2, the invention provides a kind of axial-flow leaf, including central axle sleeve 1 to be distributed on center with circumferential
Multiple blades 2 on the periphery wall of axle sleeve 1, each blade 2 are respectively provided with suction surface 3 and pressure face 4, the suction at each trailing edge of blade 2
A cowling panel 5 is equipped with power face 3, there is gap 6 between cowling panel 5 and blade 2, the gap 6 of the edge of cowling panel 5 is more than
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 only can
The design of cowling panel 5 is enough greatly facilitated, and can also further improve the rectification effect of whole axial-flow leaf and reduce vortex and make an uproar
Sound effective value；Cowling panel 5 is connected on blade 2 by least one support column 7, and the effect one of support column 7 is whole for connecting
Flowing plate 5 and blade 2, another is the structural strength for ensureing cowling panel 5, it is not produced shape in axial-flow leaf rotary course
Become, 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 cowling panel
Depending on 5 length, if blade 2 is smaller, cowling panel 5 is shorter, the number of support column 7 can be only one, if when blade 2 compared with
Greatly, when cowling panel 5 is longer, the number of support column 7 can accordingly increase to two, three or more, and all support columns 7 are most
Fortunately it is uniformly distributed on the length direction of cowling panel 5；Cowling panel 5, blade 2 and the support column 7 for connecting cowling panel 5 and blade 2
It is integral, so that without using other fixed structures again between cowling panel 5, blade 2 and support column 7, so as to defecate
In the design and manufacture of axial-flow leaf of the present invention；Cowling panel 5 is evenly equipped with more on the surface of the suction surface 3 of blade 2
Individual blind hole 8, so as to add the roughness of cowling panel 5, so when axial-flow leaf rotates, meeting turbulization, makes axle at blind hole 8
The airflow field of stream fan blade changes at cowling panel 5, and it is too fast and produce boundary layer separation to effectively prevent air velocity, and will
By the rotational noise frequency dispersion of relatively-stationary axial-flow leaf originally into broader wavelength coverage, and axial-flow leaf dominant frequency institute
The energy of carrying is then further weakened, and then effectively reduces the rotational noise of axial-flow leaf；The depth of blind hole 8 is cowling panel
The 2/5~3/5 of 5 thickness, preferably 1/2, when cowling panel 5 is thicker, the depth of blind hole 8 can suitably reduce, and when cowling panel 5 compared with
Bao Shi, 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 shallow, so as to ensure
Axial-flow leaf reduces the effect of rotational noise；5~20mm of width of cowling panel 5, preferably 6mm, 12mm, 18mm, cowling panel 5
Width selects this scope, axial-flow leaf can be made to reach the purpose for reducing eddy current crack, and also ensure the whole of cowling panel 5
Stream acts on, and in the width selection of cowling panel 5, then it is when blade 2 is larger, the width of cowling panel 5 also should be larger, and works as leaf
When piece 2 is smaller, the width of cowling panel 5 also should be smaller；The thickness of cowling panel 5 is 2~5mm, 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, make it will not be in axle
Deformation is produced in stream fan blade rotary course, so as to ensure the rectification effect of whole axial-flow leaf and reduce eddy current crack effect, and
Then it is that the thickness of cowling panel 5 also should be larger when blade 2 is larger in the thickness selection of cowling panel 5, and when blade 2 is smaller
When, 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, gap 6
Distance select this scope, axial-flow leaf can be made to reach the purpose for reducing eddy current crack, and also ensure cowling panel 5
Rectified action, and in the distance selection in gap 6, then it is when blade 2 is larger, the distance in gap 6 also should be larger, and works as blade
2 it is smaller when, the distance in gap 6 also should be smaller；The edge of cowling panel 5 facilitates the filleted transition 9 of the air intake of gap 6, chamfering mistake
The setting for crossing section 9 can aid in cowling panel 5 air-flow for flowing through the suction surface 3 of blade 2 be increasingly introducing into gap 6, and then
The pressure differential at the trailing edge of blade 2 can be further reduced, prevents the air-flow of 2 pressure face of blade 4 from being flowed back toward suction surface, so as to significantly slow
The vortex at the trailing edge of blade 2 is solved, reaches the purpose for reducing eddy current crack.
Present invention also offers a kind of blower fan, and it includes the axial-flow leaf in motor and above-described embodiment.
Present invention also offers a kind of air-conditioner outdoor unit, and it includes the blower fan in embodiment.
Embodiment above is only that the preferred embodiment of the present invention is described, and not the scope of the present invention is entered
Row limits, and on the premise of design spirit of the present invention is not departed from, those of ordinary skill in the art make to technical scheme
The various modifications gone out and improvement, it all should fall into the protection domain of claims of the present invention determination.
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 |
|---|---|---|---|
| CN201710431930.6A CN107355424B (en) | 2017-06-09 | 2017-06-09 | Axial flow fan blade and fan and air conditioner outdoor unit with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710431930.6A CN107355424B (en) | 2017-06-09 | 2017-06-09 | Axial flow fan blade and fan and air conditioner outdoor unit with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107355424A true CN107355424A (en) | 2017-11-17 |
| CN107355424B CN107355424B (en) | 2023-07-25 |
Family
ID=60273773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710431930.6A Active CN107355424B (en) | 2017-06-09 | 2017-06-09 | Axial flow fan blade and fan and air conditioner outdoor unit with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107355424B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236729A (en) * | 2018-09-28 | 2019-01-18 | 广州合众富华节能环保科技有限公司 | A kind of water impeller |
| TWI650488B (en) * | 2018-06-25 | 2019-02-11 | 行政院原子能委員會核能研究所 | Noise-reduction device for wind turbine and the wind turbine applied thereof |
| CN109958641A (en) * | 2019-05-08 | 2019-07-02 | 中山宜必思科技有限公司 | A kind of axial flow blower structure of high-efficient low-noise |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02157496A (en) * | 1988-12-09 | 1990-06-18 | Daikin Ind Ltd | Blower |
| JPH05141394A (en) * | 1991-11-18 | 1993-06-08 | Matsushita Seiko Co Ltd | Axial flow fan |
| JPH07269493A (en) * | 1994-03-31 | 1995-10-17 | Matsushita Seiko Co Ltd | Axial fan for joint use of intake and exhaust |
| JP2004011423A (en) * | 2002-06-03 | 2004-01-15 | Daikin Ind Ltd | Air flow control structure of air blowing section |
| DE102008040698A1 (en) * | 2008-07-24 | 2010-01-28 | Robert Bosch Gmbh | Fan i.e. axial flow fan, for use as ventilator for cooling electronic device i.e. personal computer, has fan blades whose front edges point in rotational direction of fan wheel, and slat separated from front edge of fan blade by air gap |
| CN102828996A (en) * | 2011-06-14 | 2012-12-19 | 珠海格力电器股份有限公司 | Axial fan |
| CN106593952A (en) * | 2017-01-12 | 2017-04-26 | 珠海格力电器股份有限公司 | Axial flow fan blade and fan and air conditioner outdoor unit with same |
| CN207093453U (en) * | 2017-06-09 | 2018-03-13 | 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 CN201710431930.6A patent/CN107355424B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02157496A (en) * | 1988-12-09 | 1990-06-18 | Daikin Ind Ltd | Blower |
| JPH05141394A (en) * | 1991-11-18 | 1993-06-08 | Matsushita Seiko Co Ltd | Axial flow fan |
| JPH07269493A (en) * | 1994-03-31 | 1995-10-17 | Matsushita Seiko Co Ltd | Axial fan for joint use of intake and exhaust |
| JP2004011423A (en) * | 2002-06-03 | 2004-01-15 | Daikin Ind Ltd | Air flow control structure of air blowing section |
| DE102008040698A1 (en) * | 2008-07-24 | 2010-01-28 | Robert Bosch Gmbh | Fan i.e. axial flow fan, for use as ventilator for cooling electronic device i.e. personal computer, has fan blades whose front edges point in rotational direction of fan wheel, and slat separated from front edge of fan blade by air gap |
| CN102828996A (en) * | 2011-06-14 | 2012-12-19 | 珠海格力电器股份有限公司 | Axial fan |
| CN106593952A (en) * | 2017-01-12 | 2017-04-26 | 珠海格力电器股份有限公司 | Axial flow fan blade and fan and air conditioner outdoor unit with same |
| CN207093453U (en) * | 2017-06-09 | 2018-03-13 | 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI650488B (en) * | 2018-06-25 | 2019-02-11 | 行政院原子能委員會核能研究所 | Noise-reduction device for wind turbine and the wind turbine applied thereof |
| CN109236729A (en) * | 2018-09-28 | 2019-01-18 | 广州合众富华节能环保科技有限公司 | A kind of water impeller |
| CN109958641A (en) * | 2019-05-08 | 2019-07-02 | 中山宜必思科技有限公司 | A kind of axial flow blower structure of high-efficient low-noise |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107355424B (en) | 2023-07-25 |
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