CN102562618B - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
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- CN102562618B CN102562618B CN201010588209.6A CN201010588209A CN102562618B CN 102562618 B CN102562618 B CN 102562618B CN 201010588209 A CN201010588209 A CN 201010588209A CN 102562618 B CN102562618 B CN 102562618B
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- centrifugal fan
- anallobar
- fan
- projective structure
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Abstract
The invention discloses a centrifugal fan, which comprises a shell. A surrounding portion and an air inlet portion are arranged on a first surface of the shell, and the surrounding portion surrounds the air inlet portion. The total area of the surrounding portion and the air inlet portion is equal to the projection area of blades, which are projected to the first surface, of the fan, and a protruded structure is arranged on the surface of the surrounding portion. Accordingly, the centrifugal fan can resolve the problem of overflow, so that characteristics of the centrifugal fan are improved.
Description
Technical field
The present invention relates to a kind of fan assembly, and particularly relate to a kind of centrifugal fan device.
Background technique
Centrifugal fan and axial center type fan difference are that centrifugal fan inlet air and exhaust outlet be not on same axis.Conventionally centrifugal fan utilizes the wind inlet of the upper and lower both sides of fan blade to suck after gas, sends distinguished and admirablely by being positioned at the exhaust outlet of sidepiece, reaches the object of air draught and air-supply.
But due to the design characteristics of centrifugal fan, have sub-fraction at the gas of fan internal flow and go out from wind inlet overflow.Special in the anallobar of fan, because anallobar can produce higher hydrodynamic pressure, gas is flowed out from the gap between blade and upper and lower covers, cause the blast of last exhaust outlet to reduce, affect the characteristic of centrifugal fan.
Therefore how improving the design of centrifugal fan, is one of important problem for improving overflow phenomena raising fan duty.
Summary of the invention
Therefore, the invention provides a kind of centrifugal fan, it comprises housing and fan blade.Housing comprises first surface and runner wall.First surface has around portion and air part, around portion around air part.Runner wall defines cavity and exhaust outlet, and the runner wall of exhaust outlet one side becomes tongue.Fan blade is located on cavity.Wherein, equal fan blade around the gross area of portion and air part and be projected to the area of contour of first surface, and there is a projective structure around the surface of portion.
According to one embodiment of the invention, projective structure is arranged at the surface around portion in the anallobar of centrifugal fan.And projective structure comprises multiple protruding parts.
According to another embodiment of the present invention, projective structure is multiple arcuation fins, around air part setting.
According to further embodiment of this invention, projective structure is multiple whirlpool arm fins, arranges along fan blade sense of rotation.
According to yet another embodiment of the invention, projective structure is male member, and male member has an inclined-plane towards runner wall.
Another aspect of the present invention is that a kind of centrifugal fan is being provided, and comprises housing and fan blade.Housing comprises first surface and runner wall.First surface has around portion and air part, around portion around air part.Runner wall defines cavity and exhaust outlet, and the runner wall of exhaust outlet one side becomes tongue.Fan blade is located on cavity.Wherein, equal fan blade and be projected to the area of contour of first surface around the gross area of portion and air part, there are multiple cutting zones around the surface of portion, and the mean roughness difference of at least two cutting zones wherein.
According to one embodiment of the invention, around portion's point centered by the rotating center of fan blade, be divided into eight cutting zones, wherein the difference of the mean roughness of at least two cutting zones is greater than 1.6 μ m.
The present invention also provides a kind of centrifugal fan, comprises housing and fan blade.Housing comprises first surface and runner wall.First surface has around portion and air part, around portion around air part.Runner wall defines cavity and exhaust outlet, and the runner wall of exhaust outlet one side becomes tongue.Fan blade is located on cavity.Wherein, equal fan blade and be projected to the area of contour of first surface around the gross area of portion and air part, there is pressure structure around the surface of portion around the surface of portion, in order to reduce the air leakage phenomena of anallobar of this centrifugal fan.
According to one embodiment of the invention, the angular range of the anallobar of centrifugal fan be the terminal from tongue to runner wall angular range 2/3rds.
The region of various embodiments of the present invention in fan blade projection in housing and surround air part in portion, be provided with special construction, make fan blade revolve can be through two or more surface roughnesses or the variation of structural design while turning around.Thus, gas can pass through different structures in anallobar and the reduced-pressure zone of centrifugal fan, reduces the probability that gas flows out from wind inlet in anallobar, and reduces the flow resistance of exhaust outlet, and then improves the characteristic of fan.
Brief description of the drawings
For above and other object of the present invention, feature, advantage and embodiment can be become apparent, appended the description of the drawings is as follows:
Fig. 1 is a kind of centrifugal fan decomposing schematic representation of an embodiment of the present invention;
Fig. 2 is that the one of an embodiment of the present invention is around portion's cutting zone schematic diagram;
A kind of anallobar schematic diagram that Fig. 3 A and Fig. 3 B are an embodiment of the present invention;
Fig. 4 is a kind of projective structure schematic diagram of an embodiment of the present invention;
Fig. 5 is a kind of projective structure schematic diagram of an embodiment of the present invention;
Fig. 6 is a kind of projective structure schematic diagram of an embodiment of the present invention;
Fig. 7 is a kind of projective structure schematic diagram of an embodiment of the present invention;
Fig. 8 A is a kind of projective structure schematic diagram of an embodiment of the present invention;
Fig. 8 B is the generalized section of AA along the line in Fig. 8 A.
Primary component symbol description
100: centrifugal fan
110: housing
112: upper shell
114: lower shell body
116: runner wall
118: bottom surface
120: air part
122: center plate
124: rib
126: wind inlet
128: wind inlet
130: around portion
140: tongue
150: fan blade
152: projective structure
154: motor
160: projective structure
162: the first inclined-planes
164: the second inclined-planes
170: projective structure
180: projective structure
190: projective structure
192: inclined-plane
194: pressurization space
210: terminal
220: exhaust outlet
222: cavity
310: blade
Embodiment
Various embodiments of the present invention fan blade projection in the area of housing and surround air part on portion region, be provided with special construction, reduce thus the probability that gas flows out from wind inlet in anallobar, and reduce the flow resistance of exhaust outlet, and then improve the characteristic of fan.
Please refer to Fig. 1, a kind of centrifugal fan decomposing schematic representation of an embodiment of the present invention.Centrifugal fan 100 comprises housing 110, fan blade 150.Housing 110 is made up of upper shell 112 and lower shell body 114.In the present embodiment, first surface means the bottom surface 118 of lower shell body 114.In other embodiments, first surface also can be upper shell 112 and has the face of air part 128.Lower shell body 114 has bottom surface 118 and runner wall 116.Bottom surface 118 has around portion 130 and air part 120.Around portion 130 around air part 120.In the present embodiment, air part 120 has rib 124 and center plate 122, and defines wind inlet 126 by rib 124 and center plate 122, and rib 124 and center plate 122 more can increase the intensity of lower shell body 114.
Runner wall 116 defines cavity 222 and exhaust outlet 220.The runner wall 116 of at least one side of exhaust outlet is arranged to tongue 140 (male member of runner inner wall).Fan blade 150 is located on center plate 122, and fan blade 150 drives by motor 154, can, in the interior rotation of cavity 222, produce distinguished and admirable.Wherein, the total size being added around portion 130 and air part 120 can equal fan blade 150 and project to the drop shadow spread of bottom surface 118.In other words the drop shadow spread that, projects to bottom surface around portion 130 for fan blade 150 deducts the part of air part 120.And there is special construction around the surface of portion 130, be for example projective structure 152 in the present embodiment.
This special construction can have the roughness local different with other.That is, can define multiple cutting zones around the surface of portion 130, and on average degree of making value (Ra) difference slightly of at least two cutting zones wherein.Please refer to Fig. 2, its one that illustrates an embodiment of the present invention is around portion's cutting zone schematic diagram.Around portion 130 point centered by the rotating center I of fan blade, be divided into eight cutting zones (A～H), the difference of the mean roughness of at least two cutting zones is greater than 1.6 μ m.Thus, in the time that blade rotary one encloses, can change through two kinds of different surfaces, and then affect the mobile resistance of fluid, different fluid resistance demands is provided, improve the characteristic of centrifugal fan.
The gas flow (gas is along the mobile path of cavity) of general centrifugal fan can be divided into anallobar and wind outlet area according to function.For example, when special construction (projective structure), and while being arranged at anallobar, can reduce the probability that gas is gone out from wind inlet overflow in anallobar.
And the definition mode of anallobar and wind outlet area, referring to Fig. 3 A and Fig. 3 B.Fig. 3 A is a kind of anallobar schematic diagram of centrifugal fan.Fig. 3 B is the anallobar schematic diagram of another kind of centrifugal fan.Wherein, taking tongue 140 as starting point, along the runner wall 116 of flabellum sense of rotation until exhaust outlet 220 (terminal 210 of runner wall) order as angle A.Angle B is ordered into A/3 (1/3rd A), the angle C B angle of ining succession, and be A/3 (1/3rd A).Therefore, angle B adds 2/3 (2/3rds) that upper angle C is angle A.Runner within the scope of definition angle B is the first anallobar, and the runner within the scope of definition angle C is the second anallobar, and the scope of angle D is defined as wind outlet area.
For example, in the time that special construction (projective structure) is arranged at anallobar, can increase in anallobar, gas flow goes out the resistance of wind inlet, reduces the probability that gas flows out from wind inlet in anallobar.And special construction preferably arranges scope at the second anallobar.
Therefore various embodiments of the present invention in centrifugal fan by special construction be arranged at anallobar in portion, in order to reduce the air leakage phenomena of anallobar of centrifugal fan.In addition, though each embodiment is arranged at special construction on the bottom surface of lower shell body, also can be arranged on and be positioned on the face that upper shell is relative with bottom surface, and the drop shadow spread that the scope arranging also projects to upper shell for fan blade deduct air part in portion.What is more, can be according under the considering of demand and cost, by special construction be arranged on simultaneously upper shell and lower shell body in portion.
Please refer to Fig. 4, is a kind of projective structure schematic diagram according to an embodiment of the present invention.Projective structure 152 can be the micro-structure (being highly less than the surface structure of 0.3 centimetre) that multiple protruding parts form, or small-sized surface structure (being highly less than the surface structure of 1 centimetre).And the shape of protruding part can be the round bump of rule or irregular distribution, as shown in the A figure in Fig. 4, or be the bumping square of rule or irregular distribution, as shown in the B figure in Fig. 4, or be the wedge shaped projection of rule or irregular distribution, as shown in the C figure in Fig. 4.
Then please refer to Fig. 5, this kind of projective structure schematic diagram.Projective structure 160 is projection, and is provided with the first inclined-plane 162 and the second inclined-plane 164 in the sense of rotation of blade.Can allow thus blade in the time rotating, allow blade and 118Jian gap, bottom surface change to some extent, and then change fluid resistance, reduce the probability that gas flows out from wind inlet in anallobar.
Please refer to Fig. 6, this is a kind of projective structure schematic diagram.Projective structure 170 is multiple arcuation fins, along air part 120 periphery settings, and then changes fluid resistance, reduces the probability that gas flows out from wind inlet in anallobar.
Please refer to Fig. 7, this kind of projective structure schematic diagram.Projective structure 180 is multiple whirlpool arm fins, arranges along fan blade sense of rotation, makes gas flow through herein time, can flow and near runner wall 116, reduce the probability that gas flows out from wind inlet in anallobar along whirlpool arm fin.
Then referring to Fig. 8 A and Fig. 8 B.Fig. 8 A is a kind of projective structure schematic diagram.Fig. 8 B is in Fig. 8 A, the generalized section of AA along the line.Wherein Fig. 8 B also illustrates blade, to know the start relation that represents this embodiment.
In this embodiment, projective structure 190 is male member, and male member has the inclined-plane 192 towards runner wall.Thus, when blade 310 is through herein time, gas is more easily limited in the pressurization space 194 that inclined-plane 192 and blade 310 form, and has reduced the probability that gas flows out from wind inlet in anallobar.
In addition, directly moulding together in the time that housing is made of each above-mentioned example structure, or make with other follow-up preparation processs such as pasting, adhere to.
The region of various embodiments of the present invention in fan blade projection in housing and surround air part in portion, be provided with special construction, make fan blade revolve can be through two or more surface roughnesses or the variation of structural design while turning around.Thus, gas can pass through different structures in anallobar and the reduced-pressure zone of centrifugal fan, reduces the probability that gas flows out from wind inlet in anallobar, and reduces the flow resistance of exhaust outlet, and then improves the characteristic of fan.
Although disclosed the present invention in conjunction with above mode of execution; but it is not in order to limit the present invention; anyly be familiar with this operator; without departing from the spirit and scope of the present invention; can be used for a variety of modifications and variations, therefore protection scope of the present invention should with enclose claim was defined is as the criterion.
Claims (1)
1. a centrifugal fan comprises:
Housing, comprises:
First surface, has around portion and air part, should be around portion around this air part;
Runner wall, defines a cavity and an exhaust outlet, and this runner wall of at least one side of this exhaust outlet becomes a tongue; And
Fan blade, is located on this cavity;
Wherein, should equal this fan blade and be projected to around the gross area of portion and this air part the area of contour of this first surface, should there is a projective structure around the surface of portion, this projective structure be arranged in the anallobar of this centrifugal fan should be around surface of portion, this projective structure is structure or the surface structure being made up of multiple protruding parts, and wherein those protruding parts are circular, square or wedge shaped projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010588209.6A CN102562618B (en) | 2010-12-14 | 2010-12-14 | Centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010588209.6A CN102562618B (en) | 2010-12-14 | 2010-12-14 | Centrifugal fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102562618A CN102562618A (en) | 2012-07-11 |
| CN102562618B true CN102562618B (en) | 2014-12-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010588209.6A Active CN102562618B (en) | 2010-12-14 | 2010-12-14 | Centrifugal fan |
Country Status (1)
| Country | Link |
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| CN (1) | CN102562618B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI632301B (en) * | 2017-04-12 | 2018-08-11 | 建準電機工業股份有限公司 | Air-exhausting structure of a ventilation fan |
| CN111594486A (en) * | 2019-02-20 | 2020-08-28 | 华为技术有限公司 | Centrifugal fan and terminal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6821088B2 (en) * | 2001-03-16 | 2004-11-23 | Denso Corporation | Centrifugal blower having noise-reduction structure |
| CN101187379A (en) * | 2006-11-17 | 2008-05-28 | 富准精密工业(深圳)有限公司 | Centrifugal fan, heat radiation device possessing the centrifugal fan and electronic device using the heat radiation device |
| CN201176966Y (en) * | 2008-03-17 | 2009-01-07 | 建凖电机工业股份有限公司 | Blowing fan supercharging device |
| CN101413515A (en) * | 2007-10-19 | 2009-04-22 | 富准精密工业(深圳)有限公司 | Centrifugal fan |
| CN101639083A (en) * | 2008-07-30 | 2010-02-03 | 富准精密工业(深圳)有限公司 | Centrifugal radiator fan and fan frame thereof |
| CN101392762B (en) * | 2007-09-21 | 2012-08-22 | 富准精密工业(深圳)有限公司 | Centrifugal fan |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010084701A (en) * | 2008-10-01 | 2010-04-15 | Daikin Ind Ltd | Blowing device |
-
2010
- 2010-12-14 CN CN201010588209.6A patent/CN102562618B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6821088B2 (en) * | 2001-03-16 | 2004-11-23 | Denso Corporation | Centrifugal blower having noise-reduction structure |
| CN101187379A (en) * | 2006-11-17 | 2008-05-28 | 富准精密工业(深圳)有限公司 | Centrifugal fan, heat radiation device possessing the centrifugal fan and electronic device using the heat radiation device |
| CN101392762B (en) * | 2007-09-21 | 2012-08-22 | 富准精密工业(深圳)有限公司 | Centrifugal fan |
| CN101413515A (en) * | 2007-10-19 | 2009-04-22 | 富准精密工业(深圳)有限公司 | Centrifugal fan |
| CN201176966Y (en) * | 2008-03-17 | 2009-01-07 | 建凖电机工业股份有限公司 | Blowing fan supercharging device |
| CN101639083A (en) * | 2008-07-30 | 2010-02-03 | 富准精密工业(深圳)有限公司 | Centrifugal radiator fan and fan frame thereof |
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| Publication number | Publication date |
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| CN102562618A (en) | 2012-07-11 |
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