CN101105180B - Heat-radiating fan - Google Patents
Heat-radiating fan Download PDFInfo
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- CN101105180B CN101105180B CN 200610103084 CN200610103084A CN101105180B CN 101105180 B CN101105180 B CN 101105180B CN 200610103084 CN200610103084 CN 200610103084 CN 200610103084 A CN200610103084 A CN 200610103084A CN 101105180 B CN101105180 B CN 101105180B
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- rotor
- radiation
- moving vane
- stator blade
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Abstract
The invention provides a heat dissipating fan, which comprises an outer frame; a first rotor with a transmission shaft and a plurality of moving vanes; a second rotor coupled with the first rotor and provided with a plurality of moving vanes; a pedestal equipped in the outer frame and used for supporting the fist and second rotors; and a plurality of stationary vanes equipped between the outer frame and substrate, wherein the back end of the stationary vane extends in the axis direction of the heat dissipating fan to increase the working ability of the second rotor.
Description
Technical field
The present invention relates to a kind of radiation fan, it improves the efficient of fan through the design optimization between the sound blade.
Background technique
Flourish along with electronic industry, when the electrical assembly heating value progressively increased, the method that in the past solved used heat with natural convection was not applied gradually and is used.At this moment, radiation fan provides excellent selection, thereby in the present electronic product, radiation fan has become an indispensable important document.
Existing general fan efficiency commonly used is being made great efforts the energy-conservation epoch and be between 15～30%, such efficient performance really can't be satisfactory; Especially inefficient fan; Convert used heat into after the energy loss, this used heat can be passed in the systematic environment, and such result can weaken the radiating effect of fan again; Thereby need the fan of bigger wattage again,, the energy forms a vicious circle undoubtedly on using.Existing fan as shown in Figure 1, it comprises a housing 10, a motor 12, a base 15 and a rotor, wherein this base 15 is connected with housing 10 through strut 14 and supports motor 12; Getting rid of on the used heat, the mode that exposes nothing more than the iron-clad 11 that adopts this rotor is in the hope of getting rid of used heat through the mode that increases the heat diffusion area that iron-clad exposes in the past.But this mode run into the more and more littler but characteristic demand of motor 12 higher in, tend to feel inadequate.
In addition, from the optimization viewpoint of fan, the optimum efficiency of the blade 13 of this rotor should be accomplished between 75～85% in theory; But the whole efficiency of existing electronic fan is about 15～30%; This efficient is deducted after the loss of moyor, and blade 13 efficient only are between 20～45%, and this and theoretical value difference are very big; From energy-conservation viewpoint, the real space that the improvement of needing is arranged of this type of fan.
Duty is event, and the present invention is to test and study and a spirit of working with perseverance through concentrated in view of the disappearance of existing technology, creates this case " radiation fan " eventually.Below for the brief description of this case.
Summary of the invention
Main purpose of the present invention is to provide a kind of radiation fan, through the aspect ratio of rotor blade and stator blade, and sound lobe numbers collocation and stator blade Airfoil Design and have optimized radiating efficiency.
According to a conception of the present invention, this radiation fan comprises a housing; One the first rotor has a transmission shaft and a plurality of moving vane; One second rotor couples with this first rotor, and has a plurality of moving vanes; One pedestal is arranged in this housing, in order to accept this first and second rotor; And a plurality of stator blades, be arranged between this housing and this pedestal, wherein the rearward end of this stator blade increases the acting ability of this second rotor along with the axial direction of this radiation fan extends.
Preferably, the rearward end of this stator blade accounts for 1/3 to 1/4 of whole stator blade length.And the front end of this stator blade is bent arc.
This second rotor is arranged at the leeward side of this first rotor, and wherein an end of this transmission shaft extends through the wheel hub end face of this second rotor and be affixed with it.This affixed mode is riveted, screw togather, bonding or equivalent way connect.This first rotor is to rotate with identical speed with this second rotor.
In addition, this radiation fan more comprises one first air-flow guiding cover, is arranged on a wherein side of this housing: and one second air-flow guiding cover, be arranged at the opposite side of this housing, and wherein this second air-flow guiding cover more comprises a plurality of stator blades, is arranged in it.This first air-flow guiding cover or this second air-flow guiding cover periphery are inclined external expanding shape or horn-like.This first air-flow guiding cover and this second air-flow guiding cover and this housing can through engage, riveted, screw togather, bonding or equivalent way make up.
This first rotor and second rotor comprise a wheel hub more respectively, and these a plurality of moving vanes are located on around this wheel hub, and wherein the wheel hub of this first rotor is coniform, bamboo hat shape or has skewed surface, and the moving vane of this first rotor be raise up skewed.The wheel hub inside of this second rotor then is the hollow cup-shaped.。Preferably, the wheel hub of this first rotor and this second rotor is formed with a plurality of radiation holes respectively, and when this radiation fan rotated, air communication was crossed this each radiation hole and this drive unit is produced the forced convection effect, and wherein the inwall of this radiation hole is skewed.
Preferably, the moving vane number of this first rotor and this second rotor is different.More preferably, the moving vane number of this first rotor is 9, and the moving vane number of this second rotor is 8 or 5.Perhaps, the moving vane number of this first rotor is 8, and the moving vane number of this second rotor is 9 or 5.And the number of this stator blade is 7.
Preferably, this first rotor and the moving vane height of this second rotor and the aspect ratio of this stator blade are 1: 1.1～1.4, and more preferably, its aspect ratio is 1: 1.6～2.2.
In addition, this housing more comprises a plurality of lugs, through the hole on this lug this radiation fan is fixed on the external system frame.
Moreover this radiation fan comprises a drive unit, is arranged in this pedestal and is accepted by this pedestal, in order to drive this first and second rotor.
According to another conception of the present invention, this radiation fan comprises a housing; One the first rotor has a transmission shaft and a plurality of moving vane; One second rotor couples with this first rotor, and has a plurality of moving vanes; One pedestal is arranged in this housing, in order to accept this first and second rotor; And a plurality of stator blades, be arranged between this housing and this pedestal, wherein this first rotor and the moving vane height of this second rotor and the aspect ratio of this stator blade are 1: 1.1～2.2.
The present invention must be through drawings as hereinafter and embodiment's detailed description, makes a more deep understanding.
Description of drawings
Fig. 1 is a kind of generalized section of existing fan;
Fig. 2 is the generalized section of first preferred embodiment of radiation fan of the present invention;
Fig. 3 A, Fig. 3 B and Fig. 3 C are the top view of the first rotor among Fig. 2, stator blade and second rotor.
Fig. 4 is the generalized section of moving vane of moving vane, stator blade and second rotor of the first rotor among Fig. 2;
Fig. 5 is the three-dimensional exploded view of second preferred embodiment of the present invention's radiation fan.
The primary component symbol description
11: iron-clad 12: motor
13: blade 14: strut
21: housing 22: pedestal
23,41: stator blade 24: the first rotor
25: drive unit 26: transmission shaft
Rotor 241,271 in 27: the second: wheel hub
242,272: radiation hole air-flow guiding in 3: the first cover
4: the second air-flow guiding covers 211: lug
243,273: moving vane
Embodiment
At first, see also Fig. 2, it shows first preferred embodiment of radiation fan of the present invention.This radiation fan comprises a housing 21; One pedestal 22 is arranged in this housing 21; A plurality of stator blades 23 are arranged between this pedestal 22 and this housing 21; One the first rotor 24; One drive unit 25 (for example motor) is arranged in this pedestal and is accepted by this pedestal 22; One transmission shaft 26; And one second rotor 27; Wherein this second rotor 27 is arranged at the rear end (that is leeward side) of this first rotor 24; One end of this transmission shaft 26 extends through wheel hub 271 end faces of this second rotor 27 and affixed with it, and wheel hub 271 inside of this second rotor 27 are the hollow cup-shaped.The affixed mode of this transmission shaft 26 and this second rotor 27 can riveted, screw togather, bonding or equivalent way are connected.Therefore, through this transmission shaft 26, this drive unit 25 can drive this first rotor 24 and this second rotor 27 simultaneously, can guarantee that this first rotor 24 rotates with identical speed with this second rotor 27.
In addition; The wheel hub end face of this first rotor 24 and this second rotor 27 is formed with a plurality of radiation holes 242,272 respectively, when this first rotor 24 is rotated by this drive unit 25 with this second rotor 27; Air-flow can be inhaled in regular turn through a plurality of radiation holes 242 on the wheel hub of this first rotor 24 and this second rotor 27; 272 (shown in dotted lines among the figure), the heat that is produced during in order to these drive unit 25 runnings of dissipation is to increase the working life of this drive unit 25.This first rotor 24 has a plurality of moving vanes 243,273 respectively with this second rotor 27, and wherein the moving vane 243 of this first rotor 24 can be and raises up skewedly, and the inlet air side of this housing 21 has expanding part 211, to be added to air quantity.
In the aspect ratio design part of moving vane and stator blade, at first, from hydromechanical viewpoint; Because of fan is to form pressure difference through the moving vane rotation, and cause air current flow, but because of moving vane rotation meeting drive air-flow; So air-flow is when flowing out fan; Can there be an angular velocity in its velocity attitude, and as far as the efficient of fan, this angular velocity can cause the loss of energy; Its two, in flow field analysis, the air-flow of fan is because of the viscid effect of fluid itself, can produce many big or small eddy current at whole fan and causes the loss of energy; Its three, fluid can produce shearing because of rubbing action through solid surface, causes energy loss, and the loss of fluid second energy also can be caused in the most advanced and sophisticated gap with the housing wall of moving vane.The present invention utilizes field mouth method to obtain optimal design ratio between the sound blade.In the parameter that is obtained, the sound blades height is than being key factor, and the effectiveness of stator blade 23 makes air-flow more smooth and easy in order to air-guiding, and reduces the eddy current generation, and the energy drag of angular velocity direction is axially done work, and makes fan efficiency better.The mouth Fa Kede from the field; The ratio of the height h2 of moving vane 243 and the height h1 of stator blade 23 is 1: 1.6～2.2; Its fan efficiency is best for the highest and space availability ratio, and whole fan efficiency of the present invention can reach to 45%, if the deduction motor losses; The efficient of its blade is about 60%, so design of the present invention is far beyond coming excellently in existing fan.Perhaps, the aspect ratio of the moving vane height of this first rotor and this second rotor and this stator blade also can be 1: 1.1～1.4.
In sound lobe numbers collocation part, the moving vane number of this first rotor 24 and this second rotor 27 is different, and for example the former is 8, and the latter is 9 or 5, and cooperating the stator blade number again is 7, shown in Fig. 3 A～Fig. 3 C, can reduce generation of noise.Perhaps, the moving vane number of this first rotor is 9, and the moving vane number of this second rotor is 8 or 5.
In stator blade Airfoil Design part, the stator blade 23 in this housing 21 can make the acting ability of this second rotor 27 increase, so that the effect of air-flow supercharging to be provided.Preferably, more can be vertical blade profile design in the tail end of this stator blade 23, as shown in Figure 4; Front end 23a is bent arc design; And rearward end 23b is a vertical design, that is along with the central axis with fan extends in parallel, this can make the acting ability of this second rotor 27 of rear end more increase.Especially, the present invention about the leaf central axial direction that is parallel to of the rearward end at 1/3～1/4 place of entire length, adopts the pattern of vertical guide vane in stator blade 23, and rearward end blade mechanical efficiency is improved, and makes whole fan efficiency reach Geng Jiahua.
Other sees also Fig. 5, and it shows second preferred embodiment of radiation fan of the present invention.Its structure and above-mentioned first preferred embodiment are similar, and both difference is in the wheel hub end face of this first rotor 24 and is coniform, bamboo hat shape or skewed, and the inwall of this radiation hole 242,272 is skewed.In addition, this radiation fan more comprises one first air-flow guiding cover, 3 and 1 second air-flow guiding cover 4, is arranged at the two opposite sides of this housing 21 respectively.Moreover, in this second air-flow guiding cover 4, more can be equipped with a plurality of stator blades 41, out-of-date when air communication, the effect of the pressurization that tries again is to improve its integral heat sink efficient.Certainly, also can in this first air-flow guiding cover 3, add a plurality of stator blades.This first air-flow guiding cover 3 is preferably with these second air-flow guiding cover, 4 peripheries and is inclined external expanding shape or horn-like.And this first air-flow guiding cover 3 and this second air-flow guiding cover 4 and this housing 21 can by engage, riveted, screw togather, bonding or equivalent way make up.In addition, this housing 21 comprises a plurality of lugs 211, can this radiation fan be fixed on the external system frame through the hole on this lug 211.
Comprehensive the above; Radiation fan provided by the present invention reaches optimized radiating efficiency through the moving vane of rotor and aspect ratio, the collocation of sound lobe numbers and the stator blade Airfoil Design of stator blade; And can effectively utilize the space, and then reach stator blade to efficiency gain and profit and loss equinoctial point between the two.
Although described the present invention with reference to above-mentioned preferred embodiment, the present invention is not limited to this, and those of ordinary skill in the art can carry out various improvement and distortion to the present invention under the premise without departing from the spirit and scope of the present invention.
Claims (19)
1. radiation fan, it comprises:
One housing;
One drive unit;
One the first rotor has a transmission shaft and a plurality of moving vane;
One second rotor couples with this first rotor, and has a plurality of moving vanes, and the moving vane number of this first rotor and this second rotor is different;
One pedestal is arranged in this housing, in order to accept this first and second rotor; And
A plurality of stator blades; Be arranged between this housing and this pedestal; Wherein the rearward end of this stator blade increases the acting ability of this second rotor along with the axial direction of this radiation fan extends, and wherein the rearward end of this stator blade accounts for 1/3 to 1/4 of whole stator blade length;
Wherein on the wheel hub of this first rotor and this second rotor, be formed with a plurality of radiation holes respectively, when this radiation fan rotated, air communication was crossed this each radiation hole and this drive unit is produced the forced convection effect.
2. radiation fan as claimed in claim 1, wherein this first rotor and the moving vane height of this second rotor and the aspect ratio of this stator blade are 1: 1.1～1.4 or are 1: 1.6～2.2.
3. radiation fan as claimed in claim 1, wherein the front end of this stator blade is bent arc.
4. radiation fan, it comprises:
One housing;
One drive unit;
One the first rotor has a transmission shaft and a plurality of moving vane;
One second rotor couples with this first rotor, and has a plurality of moving vanes;
One pedestal is arranged in this housing, in order to accept this first and second rotor; And
A plurality of stator blades; Be arranged between this housing and this pedestal; Wherein this first rotor and the moving vane height of this second rotor and the aspect ratio of this stator blade are 1: 1.1～2.2; The rearward end of stator blade is along with the axial direction of radiation fan extends, and the front end of this stator blade is bent arc, and the rearward end of this stator blade is vertical design and accounts for 1/3～1/4 of this stator blade entire length;
The moving vane number of this first rotor is 9, and the moving vane number of this second rotor is 8 or 5, and perhaps the moving vane number of this first rotor is 8, and the moving vane number of this second rotor is 9 or 5, and the number of this stator blade is 7;
Wherein on the wheel hub of this first rotor and this second rotor, be formed with a plurality of radiation holes respectively, when this radiation fan rotated, air communication was crossed this each radiation hole and this drive unit is produced the forced convection effect.
5. like claim 1 or 4 described radiation fans, wherein an end of this transmission shaft extends through the wheel hub end face of this second rotor and is affixed with it.
6. radiation fan as claimed in claim 5, wherein this affixed mode is riveted, screws togather or the bonding mode connects.
7. like claim 1 or 4 described radiation fans, it more comprises one first air-flow guiding cover, is arranged at a wherein side of this housing.
8. radiation fan as claimed in claim 7, it more comprises one second air-flow guiding cover, is arranged at the opposite side of this housing.
9. radiation fan as claimed in claim 8, wherein this second air-flow guiding cover more comprises a plurality of stator blades, is arranged in it.
10. radiation fan as claimed in claim 8; Wherein this first air-flow guiding cover or this second air-flow guiding cover periphery are inclined external expanding shape or horn-like, and this first air-flow guiding cover and this second air-flow guiding cover and this housing can be through engaging, riveted, screwing togather or the bonding mode makes up.
11. radiation fan as claimed in claim 4, wherein this first rotor and second rotor comprise a wheel hub more respectively, and these a plurality of moving vanes are located on around this wheel hub.
12. like claim 1 or 11 described radiation fans, wherein the wheel hub of this first rotor has skewed surface.
13. like claim 1 or 11 described radiation fans, wherein the wheel hub of this first rotor is coniform or the bamboo hat shape.
14. radiation fan as claimed in claim 11, wherein the inwall of this radiation hole is skewed.
15. like claim 1 or 4 described radiation fans, wherein the rotating speed of this first rotor and this second rotor is identical.
16. radiation fan as claimed in claim 1; Wherein the moving vane number of this first rotor is 9, and the moving vane number of this second rotor is 8 or 5, and perhaps the moving vane number of this first rotor is 8; The moving vane number of this second rotor is 9 or 5, and the number of this stator blade is 7.
17. like claim 1 or 4 described radiation fans, wherein the moving vane of this first rotor be raise up skewed.
18. like claim 1 or 4 described radiation fans, wherein this housing also comprises a plurality of lugs, through the hole on this lug this radiation fan is fixed on the external system frame.
19. like claim 1 or 4 described radiation fans, wherein this drive unit is arranged in this pedestal and is accepted by this pedestal, in order to drive this first and second rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610103084 CN101105180B (en) | 2006-07-10 | 2006-07-10 | Heat-radiating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610103084 CN101105180B (en) | 2006-07-10 | 2006-07-10 | Heat-radiating fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101105180A CN101105180A (en) | 2008-01-16 |
| CN101105180B true CN101105180B (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610103084 Active CN101105180B (en) | 2006-07-10 | 2006-07-10 | Heat-radiating fan |
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| Country | Link |
|---|---|
| CN (1) | CN101105180B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498320B (en) * | 2008-02-01 | 2012-04-25 | 台达电子工业股份有限公司 | Fan and impeller thereof |
| TWI354530B (en) | 2008-02-01 | 2011-12-11 | Delta Electronics Inc | Fan and impeller thereof |
| CN103682954B (en) * | 2012-09-12 | 2016-04-06 | 中国科学院光电研究院 | A kind of new gas discharge cavity |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2406088Y (en) * | 2000-01-17 | 2000-11-15 | 台达电子工业股份有限公司 | Axial-flow fan having multiple series moving vane parts |
| CN2758537Y (en) * | 2004-11-29 | 2006-02-15 | 西安交通大学 | Direct coupled two-stage axial-flow fan with one motor |
-
2006
- 2006-07-10 CN CN 200610103084 patent/CN101105180B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2406088Y (en) * | 2000-01-17 | 2000-11-15 | 台达电子工业股份有限公司 | Axial-flow fan having multiple series moving vane parts |
| CN2758537Y (en) * | 2004-11-29 | 2006-02-15 | 西安交通大学 | Direct coupled two-stage axial-flow fan with one motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101105180A (en) | 2008-01-16 |
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