CN103967839B - Axial-flow leaf and there is its air conditioner - Google Patents
Axial-flow leaf and there is its air conditioner Download PDFInfo
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- CN103967839B CN103967839B CN201310037338.XA CN201310037338A CN103967839B CN 103967839 B CN103967839 B CN 103967839B CN 201310037338 A CN201310037338 A CN 201310037338A CN 103967839 B CN103967839 B CN 103967839B
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Abstract
The invention discloses a kind of axial-flow leaf, the blade comprising wheel hub and be connected with wheel hub, the bend section that blade comprises tilting section along the cross section of equal proportion cutting plane and is connected with tilting section, wherein: equal proportion cutting plane is the face at the phase equal proportion point line place of multi-section circular arc blade being the center of circle with hub centre; Tilting section tilts to the lee face of blade from the joint of itself and wheel hub, and each point of its end is positioned at the first setting range to the distance Ra of the center of wheel hub; Bend section bends to the windward side of blade from the end of tilting section, and radius of curvature δ bend section being positioned at hub centre the same each point being circumferentially the center of circle is positioned at the second setting range.This axial-flow leaf can improve the efficiency of equipment, the noise produced when reducing fan operation.The invention also discloses a kind of air conditioner with above-mentioned axial-flow leaf.
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, and the efficiency especially for air-conditioning equipment requires higher.Blower fan system is as one of the important process part of air-conditioning equipment, and the efficiency of its performance on air-conditioning equipment has larger impact.
Axial-flow leaf in existing blower fan system is generally approximate plane structure, has larger drag losses during this kind of blade working, makes the efficiency of blower fan lower, causes the efficiency of air-conditioning equipment lower.On the other hand, when having the blower fan work of above-mentioned blade, turbulent air flow flows through blade wall, due to viscous effect, producing wall airspeed is the boundary layer of 0, will change air current flow direction under positive pressure gradient, produce and flow backwards, then occur boundary layer separation, occur vortex shedding; And leaf top and baffle liner exist certain gap, occur leading edge leaf top vortex shedding, and whirlpool constantly produces and disappearance meeting consumed energy, occurs leakage loss; In addition, noise during above-mentioned blower fan work is also larger.The problems referred to above have in the equipment of axial-flow leaf at other and exist equally.
Therefore, how to improve the efficiency of equipment, become the technical barrier that those skilled in the art are 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 comprising wheel hub and be connected with described wheel hub, the bend section that described blade comprises tilting section along the cross section of equal proportion cutting plane and is connected with described tilting section, wherein:
Described equal proportion cutting plane is with the face at the phase equal proportion point line place of the described hub centre multi-section circular arc that is 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 each point of its end is positioned at the first setting range to the distance Ra of the center of described wheel hub, and its curvature is (0 ~ 5)/Ra;
Described bend section bends to the windward side of described blade from the end of described tilting section, and described bend section is positioned at is positioned at the second setting range with the radius of curvature δ of the described hub centre same each point circumferentially that is the center of circle.
Preferably, in above-mentioned axial-flow leaf, 0.5≤(Ra-Rh)/(R-Rh) < 1, wherein, R is the radius of described blade, and Rh is the radius of 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, described bend section is positioned at the radius of curvature δ of the described hub centre same each point circumferentially that is the center of circle equal.
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 the axis of described straight line and described wheel hub meets 25 °≤α≤80 °.
Preferably, in above-mentioned axial-flow leaf, each point of the end of described tilting section is equal to the distance Ra 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 curved bend trisection.
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, the bend section that blade in axial-flow leaf provided by the invention comprises tilting section along the cross section of equal proportion cutting plane and is connected with tilting section, 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 Ra of the center of wheel hub, and its curvature is (0 ~ 5)/Ra; Bend section bends to the windward side of blade from the end of tilting section, and radius of curvature δ bend section being positioned at hub centre the same each point being circumferentially the center of circle is positioned at the second setting range.The structure tool of this blade has greatly improved, and drag losses during fan operation is reduced to some extent, and then improves the efficiency of blower fan, significantly improve the efficiency of equipment.
In addition, the phenomenon of the vortex shedding occurred when above-mentioned blade effectively can alleviate fan operation, leading edge leaf top vortex shedding and leading edge Ye Ding whirlpool leakage loss, the noise produced when simultaneously can reduce fan operation largely.
In order to realize above-mentioned second object, present invention also offers a kind of air conditioner, comprising axial-flow leaf, 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.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in the embodiment of the present invention or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
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 technological scheme provided by the invention better, 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, the bend section 122 that this blade 12 comprises tilting section 121 along the cross section of equal proportion cutting plane and is connected with this tilting section 121, this equal proportion cutting plane is with the face at the phase equal proportion point line place of the center of wheel hub 11 multi-section circular arc that is the center of circle on blade 12, as shown in Figure 2, this equal proportion point is 1/2 place of each section of circular arc, certainly, also can be 1/3 place or other.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 that blade is covered by multiple tilting section 121 then controls in the reasonable scope, to ensure the groundwork state of blade, the each point of tilting section 121 end is positioned at the first setting range to the distance Ra of the center of wheel hub 11, this first setting range sets according to actual conditions, generally the domain of walker of this Ra is less, circumferentially same to ensure each point of tilting section 121 end to be roughly positioned at wheel hub 11 be the center of circle.When the curvature of tilting section 121 is 0, namely characterizing this tilting section 121 is straight line, and then characterizing this tilting section 121 under 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 bend section 122 is positioned at is positioned at the second setting range with the radius of curvature δ of the center of the wheel hub 11 same each point circumferentially that is the center of circle, this second setting range also sets according to actual conditions, and generally the domain of walker of this δ is less, to ensure that whole bend section 122 is roughly the same from the bending trend of blade inlet edge c to blade trailing edge d, and bend section 122 is roughly arc-shaped.
Inventor is gained enlightenment by the birds shape that wing launches when hovering and glide, and thus above-mentioned improvement has been carried out to the structure of blade 12, find through many experiments, this blade 12 makes drag losses during fan operation reduce to some extent, and then improve the efficiency of blower fan, significantly improve the efficiency of equipment.
In addition, the phenomenon of the vortex shedding occurred when above-mentioned blade 12 effectively can alleviate fan operation, leading edge leaf top vortex shedding and leading edge Ye Ding whirlpool leakage loss, the noise produced when simultaneously can reduce fan operation largely.
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 end meets the following conditions to the distance Ra of the center of wheel hub 11: 0.5≤(Ra-Rh)/(R-Rh) < 1, wherein, R is the radius (this radius refers to the distance of the outer rim of vane tip b to 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 the kink height L of bend section 122, when 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 of the radial direction 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 relative to the inclination alpha of wheel hub 11, and the value at this inclination angle controls 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, α=77 ° are got, (Ra-Rh)/(R-Rh)=0.8, radius of curvature δ=0.7Ra, L=0.15R, in example 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:
Test data when axial-flow leaf that table one, the embodiment of the present invention provide runs and of the prior art
Test data contrast 1 when axial-flow leaf runs
| 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 |
According to above-mentioned data, compared with axial-flow leaf of the prior art, after the axial-flow leaf that the embodiment of the present invention provides runs, required power reduces greatly, namely represents that this axial-flow leaf significantly improves the efficiency of equipment.In addition, the noise produced when this axial-flow leaf runs also decreases.
In further technological scheme, bend section 122 is positioned at the radius of curvature δ of the center of the wheel hub 11 same each point circumferentially that is the center of circle equal, the efficiency of equipment is improved by a larger margin with this, simultaneously, there is the probability of vortex shedding, leading edge leaf top vortex shedding and leading edge Ye Ding whirlpool leakage loss phenomenon in further reduction, noise during fan operation also can be made less.Similarly, each point of the end of tilting section 121 is equal to the distance Ra of the center of wheel hub 11, and namely each point of tilting section 121 end is all positioned at wheel hub 11, and to be the center of circle circumferentially same, to reach same effect.
In actual tests process, inventor is found by value test repeatedly, when tilting section 121 end each point to the center of wheel hub 11 distance Ra meet 0.6≤(Ra-Rh)/(R-Rh)≤0.9 time, the efficiency of equipment has lifting by a larger margin equally, the vortex shedding occurred when alleviating fan operation further, leading edge leaf top vortex shedding and leading edge Ye Ding whirlpool leakage loss phenomenon, and the noise tonequality of blower fan has and improves greatly.Similarly, when the ratio of the kink height L of bend section 122 and the radius R of blade 12 meets 0.05≤L/R≤0.15, also above-mentioned effect can be reached.
In embodiment 4, the curvature of getting tilting section 121 is 1/Ra, tilting section 121 end each point to satisfy condition (Ra-Rh)/(R-Rh)=0.64 to the distance Ra of the center of wheel hub 11, 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 runs and axial-flow leaf of the prior art run contrasts as following table two:
Test data when axial-flow leaf that table two, the embodiment of the present invention provide runs and of the prior art
Test data contrast 2 when axial-flow leaf runs
According to above-mentioned data, compared with axial-flow leaf of the prior art, the postrun air quantity of the axial-flow leaf that the embodiment of the present invention provides significantly promotes, and required power reduces greatly, namely represents that this axial-flow leaf more considerably improves the efficiency of equipment.In addition, the range of decrease of the noise produced when this axial-flow leaf runs is also larger.
As in Figure 3-5, in above-mentioned each scheme, bend section 122 specifically can be curved bend trisection; Can be made up of 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 made up of 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; Planar section also can be adopted to mix with arc unit the mode forming bend section 122.Of course, bend section 122 also can adopt other forms, is not restricted herein to this, when specifically selecting, and can 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, the axial-flow leaf of this axial-flow leaf described by above-mentioned either a program.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.Apply specific case herein to set forth principle of the present invention and mode of execution, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.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 improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (13)
1. an axial-flow leaf, the blade comprising wheel hub and be connected with described wheel hub, is characterized in that, the bend section that described blade comprises tilting section along the cross section of equal proportion cutting plane and is connected with described tilting section, wherein:
Described equal proportion cutting plane is with the face at the phase equal proportion point line place of the described hub centre multi-section circular arc that is 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 each point of its end is positioned at the first setting range to the distance Ra of the center of described wheel hub, and its curvature is (0 ~ 5)/Ra;
Described bend section bends to the windward side of described blade from the end of described tilting section, and described bend section is positioned at is positioned at the second setting range with the radius of curvature δ of the described hub centre same each point circumferentially that is the center of circle.
2. according to axial-flow leaf according to claim 1, it is characterized in that, 0.5≤(Ra-Rh)/(R-Rh) < 1, wherein, R is the radius of described blade, and Rh is the radius of described wheel hub.
3. according to axial-flow leaf according to claim 1, it is characterized in that, 0.5Ra≤δ≤0.75Ra.
4. according to axial-flow leaf according to 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 according to claim 1, it is characterized in that, described bend section is positioned at the radius of curvature δ of the described hub centre same each point circumferentially that is the center of circle equal.
6. according to axial-flow leaf according to 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 the axis of described straight line and described wheel hub meets 25 °≤α≤80 °.
7. according to the axial-flow leaf according to any one of claim 1-6, it is characterized in that, each point of the end of described tilting section is equal to the distance Ra of the center of described wheel hub.
8. according to axial-flow leaf according to claim 2, it is characterized in that, 0.6≤(Ra-Rh)/(R-Rh)≤0.9.
9. according to axial-flow leaf according to claim 4, it is characterized in that, 0.05≤L/R≤0.15.
10. according to the axial-flow leaf according to any one of claim 1,2,3,4,5,6,8 and 9, it is characterized in that, described bend section is curved bend trisection.
11. according to the axial-flow leaf according to any one of claim 1,2,3,4,5,6,8 and 9, and 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 according to any one of claim 1,2,3,4,5,6,8 and 9, 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 any one of claim 1-12.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310037338.XA CN103967839B (en) | 2013-01-30 | 2013-01-30 | Axial-flow leaf and there is its air conditioner |
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| CN201310037338.XA CN103967839B (en) | 2013-01-30 | 2013-01-30 | Axial-flow leaf and there is its air conditioner |
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| CN103967839A CN103967839A (en) | 2014-08-06 |
| CN103967839B true CN103967839B (en) | 2016-03-16 |
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Families Citing this family (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 |
| CN108507017B (en) * | 2018-03-15 | 2023-07-14 | 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 and air conditioner with axial-flow fan |
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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 and air conditioner with axial-flow fan |
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