CN100350348C - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
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- CN100350348C CN100350348C CNB200410038446XA CN200410038446A CN100350348C CN 100350348 C CN100350348 C CN 100350348C CN B200410038446X A CNB200410038446X A CN B200410038446XA CN 200410038446 A CN200410038446 A CN 200410038446A CN 100350348 C CN100350348 C CN 100350348C
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- side plate
- type side
- centrifugal fan
- lip
- whirlpool type
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Abstract
The present invention relates to a centrifugal fan which is suitable for a portable electronic device. A vortex-type side plate of a shell body of the centrifugal fan forms a shape of a tongue mouth, and the vortex-type side plate in the position in the shape of a tongue mouth is not parallel to a shaft of vanes of the fan. Thus, when wake flow generated by the rotation of the vanes of the fan impacts the surface of the vortex-type side plate in the position in the shape of a tongue mouth, the noise of the centrifugal fan can be reduced.
Description
Technical field
The present invention relates to a kind of centrifugal fan (Centrifugal Fan), the air spots of whirlpool type side plate that particularly relates to a kind of tongue degree of lip-rounding shape place is capable of the centrifugal fan of fan blade axle.
Background technology
Generally speaking, portable electric appts, especially notebook (Note Book PersonalComputer) in order to bring into play maximum usefulness, need radiating module and carry out efficiently radiates heat.If heat accumulation can't dissipate immediately at device interior the time, will make the electronic component can't operate as normal, even make entire equipment work undesired, especially therefore computer system more can crash.Yet notebook is for the market demand in response to mobile, and casing inside can't reserve enough natural convection spaces.Because HFS has faced suitable bottleneck on the execution heat dissipation design, so heat dissipating module of notebook computer dispels the heat towards producing forced convertion with centrifugal fan gradually.
Please refer to Fig. 1, it is the three-dimensional structure diagram that illustrates existing centrifugal fan.This centrifugal fan 10 is to be applicable to portable electron device, notebook for example, and this centrifugal fan 10 comprises housing 11 and fan blade 31 at least.Whirlpool type shell 11 has whirlpool type side plate 13 and base plate 15, and housing 11 limits cavity 17 and air outlet 19, and wherein cavity 17 forms whirlpool type runners 21 with air outlet 19, and the whirlpool type side plate 13 of a side at air outlet 19 places then becomes tongue degree of lip-rounding shape 23.Fan blade 31 is that Z-axis 33 is located on the base plate 15 of cavity 17, and fan blade 31 is parallel to axle 33.When fan blade 31 was rotated, the horizontal direction air-flow 25 that fan blade 31 is driven produced dynamic pressures and static pressure and air-flow 25 is sent via whirlpool type runner 21.Existing air outlet 19 places utilize the curve surface gradual-enlargement pipeline of constant cross-section, the surface 16 that is the whirlpool type side plate 13 at tongue degree of lip-rounding shape 23 places is parallel to axle 33, just surface 16 is 90 ° with the angle of base plate 15, make gas flow and produce dynamic pressure and static pressure, gas just has enough dynamic pressures and static pressure to resist external drag, reaches the effect of heat radiation.
Please refer to Fig. 2, it is to illustrate the wake flow impact of existing centrifugal fan generation in the synoptic diagram of the whirlpool type side plate at tongue degree of lip-rounding shape place.During the surface 16 of the whirlpool type side plate 13 at wake flow (Wake Flow) 35 bump tongue degree of lip-rounding shapes 23 places that fan blade 31 produces, each shock point 41 can be considered the pronunciation source that produces narrow frequency noise (Narrow Band Noise) 43, because the surface 16 of the whirlpool type side plate 13 at tongue degree of lip-rounding shape 23 places is to be parallel to axle 33, according to the superposition principle of ripple, will produce the narrow frequency noise 43 of good amplitude 45 and fixed frequency (BladePass Frequency).In case need to improve heat dissipation, certainly will to increase air quantity and wind speed, yet when rotating speed increases and improve flow, but obtain high-frequency noise spectrum, make level of noise high more.
In view of above-mentioned, need the whirlpool type side plate that improves tongue degree of lip-rounding shape place badly, to solve the noise problem that centrifugal fan causes.
Summary of the invention
One of purpose of the present invention is to disclose a kind of centrifugal fan, be applicable to portable electron device, the whirlpool type side plate of this centrifugal fan housing becomes tongue degree of lip-rounding shape, and the surface of the whirlpool type side plate of tongue degree of lip-rounding shape is curved surface and the axle that is not parallel to fan blade, therefore when the whirlpool type side plate at the wake flow impact tongue degree of lip-rounding shape place that the fan blade rotation is produced surperficial, can reduce the noise of fan.
The above-mentioned purpose according to the present invention, a kind of centrifugal fan is proposed, this centrifugal fan is applicable to portable electron device, and this centrifugal fan comprises at least: housing, this housing has base plate and whirlpool type side plate, whirlpool type side plate is arranged on the base plate and limits cavity and air outlet, and becomes tongue degree of lip-rounding shape at the whirlpool type side plate of at least one side of this air outlet; And fan blade, fan blade is located on the base plate of cavity; Wherein the whirlpool type side plate at tongue degree of lip-rounding shape place is the axle that is not parallel to fan blade.
According to a preferred embodiment of the present invention, above-mentioned portable electron device is a notebook.
According to a preferred embodiment of the present invention, the surface of the whirlpool type side plate at above-mentioned tongue degree of lip-rounding shape place is arc surface, inclined-plane or have arc surface concurrently and the inclined-plane for example.
Centrifugal fan of the present invention is on the surface of the whirlpool type side plate at tongue degree of lip-rounding shape place, and is not only easy to process for curved surface and be not parallel to the axle of fan blade, more improves the noise problem that centrifugal fan causes.
Description of drawings
Fig. 1 is the three-dimensional structure diagram of existing centrifugal fan;
Fig. 2 is the synoptic diagram of the wake flow impact of existing centrifugal fan generation at the whirlpool type side plate at tongue degree of lip-rounding shape place;
Fig. 3 is the three-dimensional structure diagram of the centrifugal fan of a preferred embodiment of the present invention;
Fig. 4 is that the wake flow impact that produces of the centrifugal fan of a preferred embodiment of the present invention is in the synoptic diagram of the whirlpool type side plate at tongue degree of lip-rounding shape place;
Fig. 5 is the three-dimensional structure diagram of the centrifugal fan of another preferred embodiment of the present invention; And
Fig. 6 is the three-dimensional structure diagram of the centrifugal fan of the another preferred embodiment of the present invention.
Embodiment
Please refer to Fig. 3, it is the three-dimensional structure diagram that illustrates according to the centrifugal fan of a preferred embodiment of the present invention.This centrifugal fan 100 is applicable to portable electron device, notebook for example, and this centrifugal fan 100 comprises housing 111 and fan blade 131 at least.Housing 111 has whirlpool type side plate 113 and base plate 115, and housing 111 limits cavity 117 and air outlet 119, and wherein cavity 117 forms whirlpool type runners 121 with air outlet 119, and the whirlpool type side plate 113 of at least one side of air outlet 119 then becomes tongue degree of lip-rounding shape 123.Fan blade 131 is that axle 133 is located on the base plate 115 of cavity 117, and axle 133 is being preferable perpendicular to base plate 115.When fan blade 131 was rotated, the horizontal direction air-flow 125 that fan blade 131 is driven produced dynamic pressures and static pressure and air-flow 125 is sent via whirlpool type runner 121.Simultaneously, when fan blade 131 is rotated the surperficial 116a of whirlpool type side plate 113 at wake flow 135 bump tongue degree of lip-rounding shapes 123 places that produced, air outlet of the present invention 119 places utilize the not curve surface gradual-enlargement pipeline of uniform section, the surperficial 116a that is the whirlpool type side plate 113 at tongue degree of lip-rounding shape 123 places is not parallel to axle 133, not only strengthen outside the air outlet 119, more can reduce noise.
Please refer to Fig. 4, it is to illustrate the wake flow impact that produces according to the centrifugal fan of a preferred embodiment of the present invention in the synoptic diagram of the whirlpool type side plate at tongue degree of lip-rounding shape place.During the surperficial 116a of the whirlpool type side plate 113 at wake flow 135 bump tongue degree of lip-rounding shapes 123 places that fan blade 131 produces, each shock point 141 can be considered the pronunciation source that produces narrow frequency noise 143, because surperficial 116a is not parallel to axle 133, make the asynchronism(-nization) that each pronunciation source produces, so the pronunciation sound wave that cause in the source of different time domain is overlapping, its amplitude 145 can reduce significantly, and the intensity of promptly narrow frequency noise 143 reduces.
What deserves to be mentioned is that the present invention compares with existing whirlpool type side plate, the surface of the whirlpool type side plate at tongue degree of lip-rounding shape of the present invention place is not vertical with base plate.For example, referring again to Fig. 4, the surperficial 116a of the whirlpool type side plate 113 at tongue degree of lip-rounding shape of the present invention 123 places and the angle of base plate are θ, and wherein the θ value can for example be greater than 0 ° and less than 90 °, also can for example be greater than 90 ° and less than 180 °.In addition, the surperficial 116a of the whirlpool type side plate 113 at tongue degree of lip-rounding shape of the present invention 123 places also can curved design, for example convex surface 116b, concave curved surface 116c, inclined-plane or with arc surface and inclined-plane etc.Refer again to Fig. 3, it illustrates the three-dimensional structure diagram according to the centrifugal fan of a preferred embodiment of the present invention, and wherein surperficial 116a is a flat incline plane.Please refer to Fig. 5, it illustrates the three-dimensional structure diagram of the centrifugal fan of another preferred embodiment according to the present invention, and wherein surperficial 116b is a convex surface.Please refer to Fig. 6, it illustrates the three-dimensional structure diagram of the centrifugal fan of another preferred embodiment according to the present invention, and wherein surperficial 116c is a concave curved surface.Yet the present invention is not limited to corner dimension or its surface morphology of above-mentioned surface and base plate, anyly be familiar with this operator and can utilize other modes when understanding, and look actual demand and adjust the angle of surface of the present invention and surface level, or make up different surface morphology to constitute the surface, so do not give unnecessary details in addition at this.
In sum, but the surface of the whirlpool type side plate 115 at tongue degree of lip-rounding shape of the present invention 123 places except that the amplitude 145 of noise-decreasing, strengthen the air outlet 119, the degree of wake flow 135 skewness after the impact is reduced, obtain the noise that wideband comparatively distributes, allow the user feel preferable sound quality.
By the invention described above preferred embodiment as can be known, use centrifugal fan of the present invention, its advantage is the surface of this centrifugal fan at the whirlpool type side plate at tongue degree of lip-rounding shape place, for curved surface and be not parallel to fan blade the axle, therefore when the whirlpool type side plate at the wake flow impact tongue degree of lip-rounding shape place that the fan blade rotation is produced surperficial, can reduce the noise of fan.
Though disclosed the present invention in conjunction with above preferred embodiment; yet it is not in order to limiting the present invention, anyly is 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, so protection scope of the present invention should be with being as the criterion that claim was defined.
Claims (15)
1. a centrifugal fan is used for a portable electron device, and this centrifugal fan comprises at least:
One housing, this housing comprises at least:
One base plate; And
One whirlpool type side plate, this whirlpool type side plate is arranged on this base plate and limits a cavity and an air outlet, and becomes tongue degree of lip-rounding shape at this whirlpool type side plate of at least one side of this air outlet; And
One fan blade, this fan blade are located on this base plate of this cavity;
Wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place is this axle that is not parallel to this fan blade.
2. centrifugal fan as claimed in claim 1, wherein this portable electron device is a notebook.
3. centrifugal fan as claimed in claim 1, wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place has a surface, and this surface is to be selected from a group that is made up of the combination of a convex surface, a concave curved surface, an inclined-plane and above-mentioned each face thereof.
4. centrifugal fan as claimed in claim 1, wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place has a surface, and this surface is the combination on a convex surface and an inclined-plane.
5. centrifugal fan as claimed in claim 1, wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place has a surface, and this surface is the combination on a concave curved surface and an inclined-plane.
6. the housing of a centrifugal fan is used for a portable electron device, and this housing comprises at least:
One base plate; And
One whirlpool type side plate, this whirlpool type side plate are to be arranged on this base plate and to limit a cavity and an air outlet, and become tongue degree of lip-rounding shape at this whirlpool type side plate of at least one side of this air outlet, and wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place is to be not orthogonal to this base plate.
7. the housing of centrifugal fan as claimed in claim 6, wherein this portable electron device is a notebook.
8. the housing of centrifugal fan as claimed in claim 6, wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place has a surface, and this surface is to be selected from a group that is made up of the combination of a convex surface, a concave curved surface, an inclined-plane and above-mentioned each face thereof.
9. the housing of centrifugal fan as claimed in claim 6, wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place has a surface, and this surface is the combination on a convex surface and an inclined-plane.
10. the housing of centrifugal fan as claimed in claim 6, wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place has a surface, and this surface is the combination on a concave curved surface and an inclined-plane.
11. a centrifugal fan is used for a portable electron device, this centrifugal fan comprises at least:
One housing, this housing comprises at least:
One base plate; And
One whirlpool type side plate, this whirlpool type side plate are to be arranged on this base plate and to limit a cavity and an air outlet, and become tongue degree of lip-rounding shape at this whirlpool type side plate of at least one side of this air outlet, and wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place is to be not orthogonal to this base plate; And
One fan blade, this fan blade are that Z-axis is located on this base plate of this cavity.
12. centrifugal fan as claimed in claim 11, wherein this portable electron device is a notebook.
13. centrifugal fan as claimed in claim 11, wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place has a surface, and this surface is to be selected from a group that is made up of the combination of a convex surface, a concave curved surface, an inclined-plane and above-mentioned each face thereof.
14. centrifugal fan as claimed in claim 11, wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place has a surface, and this surface is the combination on a convex surface and an inclined-plane.
15. centrifugal fan as claimed in claim 11, wherein this whirlpool type side plate at this tongue degree of lip-rounding shape place has a surface, and this surface is the combination on a concave curved surface and an inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410038446XA CN100350348C (en) | 2004-04-26 | 2004-04-26 | Centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410038446XA CN100350348C (en) | 2004-04-26 | 2004-04-26 | Centrifugal fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1690918A CN1690918A (en) | 2005-11-02 |
| CN100350348C true CN100350348C (en) | 2007-11-21 |
Family
ID=35346396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410038446XA Expired - Fee Related CN100350348C (en) | 2004-04-26 | 2004-04-26 | Centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100350348C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI385308B (en) * | 2007-12-31 | 2013-02-11 | Foxconn Tech Co Ltd | Centrifugal blower |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649845B (en) * | 2008-08-13 | 2013-02-20 | 富准精密工业(深圳)有限公司 | Centrifugal fan |
| CN101725573B (en) | 2008-10-13 | 2013-04-24 | 富准精密工业(深圳)有限公司 | Centrifugal fan |
| TWI465010B (en) * | 2010-04-21 | 2014-12-11 | Foxconn Tech Co Ltd | Centrifugal fan |
| JP5629505B2 (en) * | 2010-06-25 | 2014-11-19 | 山洋電気株式会社 | Centrifugal fan |
| TWI458892B (en) * | 2012-01-31 | 2014-11-01 | Quanta Comp Inc | Centrifugal fan |
| CN110219828B (en) * | 2019-05-21 | 2021-06-01 | 海信（广东）空调有限公司 | Volute of centrifugal fan, centrifugal fan and electrical apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2461243Y (en) * | 2000-12-22 | 2001-11-21 | 神达电脑股份有限公司 | Card circuit board heat sink |
| DE10214508A1 (en) * | 2001-07-17 | 2003-02-13 | Delta Electronics Inc | Improved heat dissipation device |
| CN1435575A (en) * | 2002-01-29 | 2003-08-13 | 株式会社东芝 | Centrifugel fan unit with vortex chamber and electronic device provided with same |
-
2004
- 2004-04-26 CN CNB200410038446XA patent/CN100350348C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2461243Y (en) * | 2000-12-22 | 2001-11-21 | 神达电脑股份有限公司 | Card circuit board heat sink |
| DE10214508A1 (en) * | 2001-07-17 | 2003-02-13 | Delta Electronics Inc | Improved heat dissipation device |
| CN1435575A (en) * | 2002-01-29 | 2003-08-13 | 株式会社东芝 | Centrifugel fan unit with vortex chamber and electronic device provided with same |
| TW558614B (en) * | 2002-01-29 | 2003-10-21 | Toshiba Corp | Centrifugal blower unit having swirl chamber, and electronic apparatus equipped with centrifugal blower unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI385308B (en) * | 2007-12-31 | 2013-02-11 | Foxconn Tech Co Ltd | Centrifugal blower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1690918A (en) | 2005-11-02 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071121 Termination date: 20160426 |