CN103967839A - Axial flow fan blade and air conditioner with same - Google Patents
Axial flow fan blade and air conditioner with same Download PDFInfo
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- CN103967839A CN103967839A CN201310037338.XA CN201310037338A CN103967839A CN 103967839 A CN103967839 A CN 103967839A CN 201310037338 A CN201310037338 A CN 201310037338A CN 103967839 A CN103967839 A CN 103967839A
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- 238000005452 bending Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 238000004378 air conditioning Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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Abstract
The invention discloses an axial flow fan blade, which comprises a hub and a blade connected with the hub, wherein the cross section of the blade along an equal-proportion section plane comprises an inclined section and a bending section connected with the inclined section, wherein: the equal-proportion section is a plane on which the connecting lines of the same equal-proportion points of a plurality of sections of circular arcs on the blade with the center of the hub as the center of a circle are located; the inclined section inclines from the connection part of the inclined section and the hub to the leeward side of the blade, and the distance Ra from each point at the tail end of the inclined section to the center of the hub is within a first set range; the bending section bends from the tail end of the inclined section to the windward side of the blade, and the curvature radius delta of each point, which is positioned on the same circumference and takes the center of the hub as the center of a circle, on the bending section is positioned in a second set range. The axial flow fan blade can improve the energy efficiency of equipment and reduce noise generated when a fan operates. The invention also discloses an air conditioner with the axial flow fan blade.
Description
Technical field
The present invention relates to Fan Equipment technical field, particularly a kind of axial-flow leaf.The invention still further relates to a kind of air conditioner with above-mentioned axial-flow leaf.
Background technique
Be becoming tight instantly in energy day, people are more and more higher for the requirement of product efficiency, especially require higher for the efficiency of air-conditioning equipment.Blower fan system is as one of important process part of air-conditioning equipment, and its performance has larger impact to the efficiency of air-conditioning equipment.
Axial-flow leaf in existing blower fan system is generally approximate plane structure, has larger drag losses when this kind of blade working, makes the efficiency of blower fan lower, causes the efficiency of air-conditioning equipment lower.On the other hand, there is blower fan when work of above-mentioned blade, the turbulent air flow blade wall of flowing through, due to viscous effect, produce the boundary layer that wall airspeed is 0, under positive pressure gradient, will change air current flow direction, produce and flow backwards, then occur boundary layer separation, occur vortex shedding; And leaf pushes up and baffle liner exists certain gap, occurs leading edge leaf top vortex shedding, and whirlpool constantly produces and the meeting consumed energy that disappears, and occurs leakage loss; In addition, noise when above-mentioned blower fan is worked is also larger.The problems referred to above have in the equipment of axial-flow leaf and exist equally at other.
Therefore, how to improve the efficiency of equipment, become those skilled in the art's technical barrier urgently to be resolved hurrily.
Summary of the invention
The object of this invention is to provide a kind of axial-flow leaf, this axial-flow leaf can improve the efficiency of equipment.Another object of the present invention is to provide a kind of air conditioner with above-mentioned axial blade.
In order to realize above-mentioned first object, the invention provides following technological scheme:
A kind of axial-flow leaf, the blade that comprises wheel hub and be connected with described wheel hub, described blade comprises tilting section and the bend section being connected with described tilting section along the cross section of equal proportion cutting plane, wherein:
Described equal proportion cutting plane is the face at the identical equal proportion point line place of the multi-section circular arc taking described wheel hub center as the center of circle on described blade;
Described tilting section tilts to the lee face of described blade from the joint of itself and described wheel hub, and the each point of its end is positioned at the first setting range to the distance R a of the center of described wheel hub, and its curvature is (0～5)/Ra;
Described bend section is the bending of the windward side to described blade from the end of described tilting section, and the radius of curvature δ that is positioned at the each point on the same circumference taking described wheel hub center as the center of circle on described bend section is positioned at the second setting range.
Preferably, in above-mentioned axial-flow leaf, 0.5≤(Ra-Rh)/(R-Rh) < 1, wherein, the radius that R is described blade, the radius that Rh is described wheel hub.
Preferably, in above-mentioned axial-flow leaf, 0.5Ra≤δ≤0.75Ra.
Preferably, in above-mentioned axial-flow leaf, the ratio of the kink height L of described bend section and the radius R of described blade is: 0 < L/R≤0.25.
Preferably, in above-mentioned axial-flow leaf, the radius of curvature δ that is positioned at the each point on the same circumference taking described wheel hub center as the center of circle on described bend section equates.
Preferably, in above-mentioned axial-flow leaf, the windward side of described tilting section is straight line along the cutting line of described equal proportion cutting plane, and the angle α between described straight line and the axis of described wheel hub meets 25 °≤α≤80 °.
Preferably, in above-mentioned axial-flow leaf, the each point of the end of described tilting section is equal to the distance R a of the center of described wheel hub.
Preferably, in above-mentioned axial-flow leaf, 0.6≤(Ra-Rh)/(R-Rh)≤0.9.
Preferably, in above-mentioned axial-flow leaf, 0.05≤L/R≤0.15.
Preferably, in above-mentioned axial-flow leaf, described bend section is arc bend section.
Preferably, in above-mentioned axial-flow leaf, described bend section is made up of two or more planar sections, and the slope of each described planar section is not etc.
Preferably, in above-mentioned axial-flow leaf, described bend section is made up of two or more arc unit, and the curvature of each described arc unit is not etc.
In technique scheme, blade in axial-flow leaf provided by the invention comprises tilting section and the bend section being connected with tilting section along the cross section of equal proportion cutting plane, tilting section tilts to the lee face of blade from the joint of itself and wheel hub, the each point of its end is positioned at the first setting range to the distance R a of the center of wheel hub, and its curvature is (0～5)/Ra; Bend section is the bending of the windward side to blade from the end of tilting section, and the radius of curvature δ that is positioned at the each point on the same circumference taking wheel hub center as the center of circle on bend section is positioned at the second setting range.The structure tool of this blade has greatly improved, and the drag losses while making fan operation reduces to some extent, and then has improved the efficiency of blower fan, has significantly improved the efficiency of equipment.
In addition, the phenomenon of vortex shedding, leading edge leaf top vortex shedding and leading edge Ye Ding whirlpool leakage loss that above-mentioned blade occurs can effectively alleviate fan operation time, the noise producing can reduce fan operation largely time simultaneously.
In order to realize above-mentioned second object, the present invention also provides a kind of air conditioner, comprises axial-flow leaf, and described axial-flow leaf is the axial-flow leaf described in above-mentioned any one.Because above-mentioned axial-flow leaf has above-mentioned technique effect, the air conditioner with this axial-flow leaf also should have corresponding technique effect.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, to the accompanying drawing of required use in the embodiment of the present invention or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the first axial-flow leaf that Fig. 1 provides for the embodiment of the present invention;
The parameter indexing figure of the first axial-flow leaf that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 is that the A-A of Fig. 2 is to sectional view;
The structural representation of the second axial-flow leaf that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the third axial-flow leaf that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Core of the present invention is to provide a kind of axial-flow leaf, and this axial-flow leaf can improve the efficiency of equipment.Another core of the present invention is to provide a kind of air conditioner with above-mentioned axial blade.
In order to make those skilled in the art understand better technological scheme provided by the invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As Figure 1-3, the blade 12 that the axial-flow leaf that the embodiment of the present invention provides comprises wheel hub 11 and is connected with wheel hub 11, this blade 12 comprises tilting section 121 and the bend section 122 being connected with this tilting section 121 along the cross section of equal proportion cutting plane, this equal proportion cutting plane is the face at the identical equal proportion point line place of the multi-section circular arc taking wheel hub 11 center as the center of circle on blade 12, as shown in Figure 2, locate, certainly, also can be at 1/3 and locate or other for 1/2 that this equal proportion point is each section of circular arc.In Fig. 1, a place is root of blade, and b is vane tip, and c is blade inlet edge, and d is blade trailing edge.
Tilting section 121 tilts to the lee face of blade 12 from the joint of itself and wheel hub 11, its curvature is (0～5)/Ra, this curvature range is the curvature of the tilting section 121 under same equal proportion cutting plane, the curvature of the part being covered by multiple tilting sections 121 on blade is controlled in the reasonable scope, to ensure the groundwork state of blade, the each point of tilting section 121 ends is positioned at the first setting range to the distance R a of the center of wheel hub 11, this first setting range is set according to actual conditions, generally the domain of walker of this Ra is less, roughly be positioned on the same circumference taking wheel hub 11 as the center of circle with the each point that ensures tilting section 121 ends.In the time that the curvature of tilting section 121 is 0, characterizing this tilting section 121 is straight line, and this tilting section 121 of the next sign of other curvature is small curve curve.
Bend section 122 bends to the windward side of blade 12 from the end of tilting section 121, and the radius of curvature δ that is positioned at the each point on the same circumference taking wheel hub 11 center as the center of circle on bend section 122 is positioned at the second setting range, this second setting range is also set according to actual conditions, and generally the domain of walker of this δ is less, with ensure whole bend section 122 from blade inlet edge c the bending trend to blade trailing edge d roughly the same, and bend section 122 is roughly circular-arc.
Inventor is gained enlightenment by the birds shape that wing launches in the time hovering and glide, and thus the structure of blade 12 is carried out to above-mentioned improvement, find through many experiments, drag losses when this blade 12 makes fan operation reduces to some extent, and then improved the efficiency of blower fan, significantly improve the efficiency of equipment.
In addition, the phenomenon of vortex shedding, leading edge leaf top vortex shedding and leading edge Ye Ding whirlpool leakage loss that above-mentioned blade 12 occurs can effectively alleviate fan operation time, the noise producing can reduce fan operation largely time simultaneously.
In order to optimize above-mentioned technique effect, in the axial-flow leaf that the embodiment of the present invention provides, the each point of tilting section 121 ends meets the following conditions to the distance R a of the center of wheel hub 11: 0.5≤(Ra-Rh)/(R-Rh) < 1, wherein, R is the radius (this radius refers to that the outer rim of vane tip b is to the distance of the center of wheel hub 11) of blade 12, and Rh is the radius of wheel hub 11.In preferred version, above-mentioned radius of curvature δ meets the following conditions: 0.5Ra≤δ≤0.75Ra.Vertical distance between the end of bend section 122 and the elongation line of tilting section 121 is designated as to the kink height L of bend section 122, in the time that the ratio of the radius R of this kink height L and blade 12 meets 0 < L/R≤0.25, above-mentioned technique effect will be more obvious.
Further, in technological scheme, as shown in Figures 2 and 3, the windward side of tilting section 121 is straight line along the cutting line radially of blade 12, and any point on this straight line is positioned at equation
On f (x)=-kx, wherein, k is the slope of this straight line, and the angle α between the axis of this straight line and wheel hub 11 meets 25 °≤α≤80 °, tilting section 121 is tending towards constant with respect to the inclination alpha of wheel hub 11, and the value control at this inclination angle within the specific limits, to ensure that tilting section 121 and bend section 122 have better synergy, for the efficiency of equipment provides larger space.
Particularly, in embodiment 1, get α=77 °, (Ra-Rh)/(R-Rh)=0.8, radius of curvature δ=0.7Ra, L=0.15R, in embodiment 2, get α=80 °, (Ra-Rh)/(R-Rh)=0.64, radius of curvature δ=0.65Ra, L=0.15R, in embodiment 3, get α=64 °, (Ra-Rh)/(R-Rh)=0.64, radius of curvature δ=0.5Ra, L=0.05R, obtains following laboratory data:
The test data when axial-flow leaf that table one, the embodiment of the present invention provide moves and of the prior art
Test data contrast 1 when axial-flow leaf operation
| Scheme | Air quantity (m 3/h) | Power (w) noise (dB (A)) |
| Axial-flow leaf of the prior art | 5559.8 | 174.555.5 |
| Axial-flow leaf in embodiment 1 | 5535.4 | 154.355.0 |
| Axial-flow leaf in embodiment 2 | 5544.1 | 148.954.8 |
| Axial-flow leaf in embodiment 3 | 5572.3 | 155.254.0 |
Known according to above-mentioned data, compared with axial-flow leaf of the prior art, after the axial-flow leaf operation that the embodiment of the present invention provides, required power reduces greatly, represents that this axial-flow leaf has significantly improved the efficiency of equipment.In addition, the noise producing when this axial-flow leaf moves also decreases.
Further in technological scheme, the radius of curvature δ that is positioned at the each point on the same circumference taking wheel hub 11 center as the center of circle on bend section 122 equates, improve by a larger margin the efficiency of equipment with this, simultaneously, further reduce the probability that occurs vortex shedding, leading edge leaf top vortex shedding and leading edge Ye Ding whirlpool leakage loss phenomenon, the noise also can make fan operation time is less.Similarly, the each point of the end of tilting section 121 is equal to the distance R a of the center of wheel hub 11, and the each point of tilting section 121 ends is all positioned on the same circumference taking wheel hub 11 as the center of circle, to reach same effect.
In actual tests process, inventor finds by value test repeatedly, when tilting section 121 end each points to the distance R a of the center of wheel hub 11 meet 0.6≤(Ra-Rh)/(R-Rh)≤0.9 time, the efficiency of equipment has lifting by a larger margin equally, the vortex shedding, leading edge leaf top vortex shedding and the leading edge Ye Ding whirlpool leakage loss phenomenon that while further having alleviated fan operation, have occurred, and the noise tonequality of blower fan has improvement greatly.Similarly, the ratio of the radius R of the kink height L of bend section 122 and blade 12 meets 0.05≤L/R≤0.15 o'clock, also can reach above-mentioned effect.
In embodiment 4, the curvature of getting tilting section 121 is 1/Ra, tilting section 121 end each points are to the distance R a of the center of wheel hub 11 (Ra-Rh)/(R-Rh)=0.64 that satisfies condition, radius of curvature δ=the 0.65Ra of bend section 122, and the kink height L=0.15R of bend section 122, test data when test data when this axial-flow leaf operation and axial-flow leaf of the prior art operation contrasts as following table two:
The test data when axial-flow leaf that table two, the embodiment of the present invention provide moves and of the prior art
Test data contrast 2 when axial-flow leaf operation
Known according to above-mentioned data, compared with axial-flow leaf of the prior art, the postrun air quantity of axial-flow leaf that the embodiment of the present invention provides significantly promotes, and required power reduces greatly, represents that this axial-flow leaf has improved the efficiency of equipment more significantly.The range of decrease of the noise producing when in addition, this axial-flow leaf moves is also larger.
As in Figure 3-5, in above-mentioned each scheme, bend section 122 specifically can be arc bend section; Can be formed by two or more planar sections, and the slope of each planar section is not etc., to ensure that bend section 122 is roughly arcuation yet; Can be formed by two or more arc unit, and the curvature of each arc unit is not etc., also must ensure that bend section 122 is roughly arcuation yet; Also can adopt planar section to mix the mode that forms bend section 122 with arc unit.Certainly, bend section 122 also can adopt other forms, herein this is not restricted, and while specifically selection, can be in conjunction with the specific constructive form of the selecting factors bend section 122 such as efficiency requirement, noise requirements of the processability of blade, equipment.
The air conditioner that the embodiment of the present invention provides comprises housing and is arranged at the axial-flow leaf in housing, and this axial-flow leaf is the described axial-flow leaf of above-mentioned arbitrary scheme.Because above-mentioned axial-flow leaf has above-mentioned technique effect, the air conditioner with this axial-flow leaf also should have corresponding technique effect, repeats no more herein.
Above axial-flow leaf provided by the present invention and the air conditioner with it are described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (13)
1. an axial-flow leaf, the blade that comprises wheel hub and be connected with described wheel hub, is characterized in that, described blade comprises tilting section and the bend section being connected with described tilting section along the cross section of equal proportion cutting plane, wherein:
Described equal proportion cutting plane is the face at the identical equal proportion point line place of the multi-section circular arc taking described wheel hub center as the center of circle on described blade;
Described tilting section tilts to the lee face of described blade from the joint of itself and described wheel hub, and the each point of its end is positioned at the first setting range to the distance R a of the center of described wheel hub, and its curvature is (0～5)/Ra;
Described bend section is the bending of the windward side to described blade from the end of described tilting section, and the radius of curvature δ that is positioned at the each point on the same circumference taking described wheel hub center as the center of circle on described bend section is positioned at the second setting range.
2. according to axial-flow leaf claimed in claim 1, it is characterized in that, 0.5≤(Ra-Rh)/(R-Rh) < 1, wherein, the radius that R is described blade, the radius that Rh is described wheel hub.
3. according to axial-flow leaf claimed in claim 1, it is characterized in that 0.5Ra≤δ≤0.75Ra.
4. according to axial-flow leaf claimed in claim 1, it is characterized in that, the ratio of the kink height L of described bend section and the radius R of described blade is: 0 < L/R≤0.25.
5. according to axial-flow leaf claimed in claim 1, it is characterized in that, the radius of curvature δ that is positioned at the each point on the same circumference taking described wheel hub center as the center of circle on described bend section equates.
6. according to axial-flow leaf claimed in claim 1, it is characterized in that, the windward side of described tilting section is straight line along the cutting line of described equal proportion cutting plane, and the angle α between described straight line and the axis of described wheel hub meets 25 °≤α≤80 °.
7. according to the axial-flow leaf described in any one in claim 1-6, it is characterized in that, the each point of the end of described tilting section is equal to the distance R a of the center of described wheel hub.
8. according to axial-flow leaf claimed in claim 2, it is characterized in that 0.6≤(Ra-Rh)/(R-Rh)≤0.9.
9. according to axial-flow leaf claimed in claim 4, it is characterized in that 0.05≤L/R≤0.15.
10. according to the axial-flow leaf described in any one in claim 1,2,3,4,5,6,8 and 9, it is characterized in that, described bend section is arc bend section.
11. according to the axial-flow leaf described in any one in claim 1,2,3,4,5,6,8 and 9, it is characterized in that, described bend section is made up of two or more planar sections, and the slope of each described planar section is not etc.
12. according to the axial-flow leaf described in any one in claim 1,2,3,4,5,6,8 and 9, it is characterized in that, described bend section is made up of two or more arc unit, and the curvature of each described arc unit is not etc.
13. 1 kinds of air conditioners, comprise axial-flow leaf, it is characterized in that, described axial-flow leaf is the axial-flow leaf as described in claim 1-12 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310037338.XA CN103967839B (en) | 2013-01-30 | 2013-01-30 | Axial flow fan blade and air conditioner with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310037338.XA CN103967839B (en) | 2013-01-30 | 2013-01-30 | Axial flow fan blade and air conditioner with same |
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| Publication Number | Publication Date |
|---|---|
| CN103967839A true CN103967839A (en) | 2014-08-06 |
| CN103967839B CN103967839B (en) | 2016-03-16 |
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| CN201310037338.XA Active CN103967839B (en) | 2013-01-30 | 2013-01-30 | Axial flow fan blade and air conditioner with same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240317A (en) * | 2015-10-28 | 2016-01-13 | 佛山市富士宝电器科技股份有限公司 | Fan blade |
| CN108507017A (en) * | 2018-03-15 | 2018-09-07 | 珠海格力电器股份有限公司 | Fan blade structure and air conditioner with same |
| CN111946667A (en) * | 2020-07-28 | 2020-11-17 | 东风马勒热***有限公司 | Fan with bent blades |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007024004A (en) * | 2005-07-21 | 2007-02-01 | Daikin Ind Ltd | Axial fan |
| CN101149062A (en) * | 2007-11-09 | 2008-03-26 | 北京航空航天大学 | Wheel hub shaping method for improving end area blocking |
| CN101835990A (en) * | 2007-10-25 | 2010-09-15 | Lg电子株式会社 | Fan |
| CN203114733U (en) * | 2013-01-30 | 2013-08-07 | 珠海格力电器股份有限公司 | Axial flow fan blade and air conditioner with same |
-
2013
- 2013-01-30 CN CN201310037338.XA patent/CN103967839B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007024004A (en) * | 2005-07-21 | 2007-02-01 | Daikin Ind Ltd | Axial fan |
| CN101835990A (en) * | 2007-10-25 | 2010-09-15 | Lg电子株式会社 | Fan |
| CN101149062A (en) * | 2007-11-09 | 2008-03-26 | 北京航空航天大学 | Wheel hub shaping method for improving end area blocking |
| CN203114733U (en) * | 2013-01-30 | 2013-08-07 | 珠海格力电器股份有限公司 | Axial flow fan blade and air conditioner with same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240317A (en) * | 2015-10-28 | 2016-01-13 | 佛山市富士宝电器科技股份有限公司 | Fan blade |
| CN108507017A (en) * | 2018-03-15 | 2018-09-07 | 珠海格力电器股份有限公司 | Fan blade structure and air conditioner with same |
| CN111946667A (en) * | 2020-07-28 | 2020-11-17 | 东风马勒热***有限公司 | Fan with bent blades |
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| Publication number | Publication date |
|---|---|
| CN103967839B (en) | 2016-03-16 |
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