CN100560986C - Axial flow fan for heat dissipation of electronic components - Google Patents
Axial flow fan for heat dissipation of electronic components Download PDFInfo
- Publication number
- CN100560986C CN100560986C CNB2007103077039A CN200710307703A CN100560986C CN 100560986 C CN100560986 C CN 100560986C CN B2007103077039 A CNB2007103077039 A CN B2007103077039A CN 200710307703 A CN200710307703 A CN 200710307703A CN 100560986 C CN100560986 C CN 100560986C
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- China
- Prior art keywords
- fan
- hub
- blade
- axial flow
- center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000017525 heat dissipation Effects 0.000 title abstract 2
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 239000000758 substrate Substances 0.000 abstract description 10
- 241000883990 Flabellum Species 0.000 description 4
- 230000003116 impacting effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
一种用于电子元器件散热的轴流风扇，包括位于风扇主体中心的轮毂以及固定在轮毂外侧的主叶片，在轮毂上还设置有附贴叶片，该附贴叶片的一端与轮毂固定连接，另一端与主叶片的后缘固定连接。由于本发明通过在风扇中心轮毂上附加小扇叶来改善轴流电机下游区域的换热情况，从而大大提高了散热器的效率。与传统风扇相比，风扇中心轮毂设置有附贴叶片，在相同输入功率下，本发明冲击基板的整体冷却性能比传统轴流风扇提高了10%左右。
An axial flow fan for heat dissipation of electronic components, comprising a hub located in the center of the fan main body and a main blade fixed outside the hub, an attached blade is also arranged on the hub, one end of the attached blade is fixedly connected to the hub, The other end is fixedly connected with the trailing edge of the main blade. Because the present invention improves the heat exchange in the downstream area of the axial flow motor by adding small fan blades to the central hub of the fan, thereby greatly improving the efficiency of the radiator. Compared with the traditional fan, the central hub of the fan is equipped with attached blades. Under the same input power, the overall cooling performance of the impact substrate of the present invention is about 10% higher than that of the traditional axial flow fan.
Description
Technical field
The present invention relates to a kind of axial fan, be specifically related to a kind of axial fan technical field that is applied to cooling electronic component.
Technical background
Axial fan has reliable and stable performance and price advantage thereof, in the cooling system of electronic equipment, occupy for a long time widely always and use, as the cooling system of central processing unit (CPU) (CPU), generally serve as the heat sink unit that the extended surface of CPU constitutes by axial fan and aluminum fin formula radiator.Upper surface at thermal source (CPU) is installed a finned heat sink structure.The substrate that is connected with CPU (CPU approximately occupy whole base plate area 13%) adopts the material with higher coefficient of heat transfer usually, as aluminium, copper etc.In air side, axial fan drives the throat that cooling working medium (air) enters gilled radiator, and the board plane of fin plays guide functions to the axial flow body that enters; Bump takes place and causes it to change flow direction in the substrate of axial flow body and gilled radiator, is that two opposite directions of middle mind-set parallel substrate flow with the stagnant area, thereby takes away the heat that finned surface and substrate distribute.In the solid side, the heat that is sent by the CPU thermal source is delivered to finned surface by substrate, and finned surface serves as the extended surface of thermal source to reach the effect that strengthens heat exchange; In addition, convection heat exchange occurs in the exposed surface of substrate rather than the root of finned surface.
The axial fan that is widely used in electronic device cooling system at present is made up of blade, axial flow motor and shell, and the axial flow motor of its heart portion is supported to keep its spatial position by 3 or 4 square bars (being positioned at the upstream or the downstream of blade).Primary blades is outwards extended by center hub (being wrapped in the axial flow motor), because above-mentioned geometrical relationship, the motor that is positioned at the fan center place occupies 25% of whole circulation area, cause the direct shock point of fan airstream away from the baffle plate center portion, thereby had a strong impact on the impact cooling effect of substrate center place (being the CPU position).In other words, the direct cooled zones of axial fan is not the center portion of gilled radiator substrate, " the High Temperature district " promptly be close to thermal source CPU center yet.Therefore, conventional axial-flow fan exists great limitation on cooling performance, but has very big potentiality to be exploited.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of disturbance that can strengthen axial fan over against the direct current generator exit flow field is provided, thereby strengthen the cooling electronic component axial fan of its cooling performance.
For achieving the above object, the technical solution used in the present invention is: the primary blades that comprises the wheel hub that is positioned at the fan main body center and be fixed on the wheel hub outside, on wheel hub, also be provided with square attached subsides blade, one end of this attached subsides blade is fixedlyed connected with wheel hub, and the other end is fixedlyed connected with the trailing edge of primary blades.The long 16mm of attached subsides blade of the present invention, wide 6mm, thick 1.6mm, length overall is that the length that the attached subsides blade of 16mm is affixed on the center hub is 10mm, the length that is affixed on the primary blades trailing edge is 6mm.Because the present invention improves the heat exchange situation of axial flow motor downstream area by additional little flabellum on fan center's wheel hub, thereby has improved the efficient of radiator greatly.Compare with conventional fan, fan center's wheel hub is provided with attached subsides blade, and under identical input power, the whole cooling performance that the present invention impacts substrate has improved about 10% than conventional axial-flow fan.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present invention;
Fig. 2 be the present invention and conventional axial-flow fan respectively when the uniform impingement spacing is 0.4D, the even local thermal resistance R θ distribution situation radially on the impact baffle plate of heating.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1, the primary blades 2 that the present invention includes the wheel hub 1 that is positioned at the fan main body center and be fixed on wheel hub 1 outside also is provided with square attached subsides blade 3 on wheel hub 1, attached subsides blade 3 long 16mm, wide 6mm, thick 1.6mm.Except the edge attached to wheel hub 1 and primary blades 2 trailing edge both sides, other limits of attached subsides blade 3 all are trimmed its slyness to the greatest extent.Length overall is that the length of attached subsides blade 3 on center hub 1 of 16mm is 10mm, is 6mm in the length of primary blades 3 trailing edges.Because center hub 1 is provided with attached subsides blade 3, causes weight of the present invention to increase by 15%.Because the VDC constant (12DCV) of live axle flow fan, the rotating speed of fan has correspondingly reduced by 9%, drops to 2347rpm from 2577rpm.
Axial fan impacts dull and stereotyped cooling performance test:
In order to estimate the impact cooling performance of the present invention with respect to conventional axial-flow fan, the inventor has compared local thermal resistance R θ between the two, and it is defined as follows:
Q and D are respectively by the net heat flow of flat board and the diameter of axial fan in the formula; Function T s (y/D) records by film thermocouple in the assessment test for impacting the local temperature function on the flat board; Y is a radial coordinate; Ti is the air inlet temperature of axial fan.
Fig. 2 has provided when conventional axial-flow fan and the present invention impact flat board respectively, evenly the local thermal resistance R θ distribution situation radially of heated plate.Because symmetry properties, the inventor has shown that at this wherein abscissa be the relative position that distance is impacted dull and stereotyped center along the distribute experimental result of a side of coordinate axes forward, and y coordinate is the local thermal resistance R θ on the impact flat board.
Radially from impacting the local thermal resistance distribution of analysis conventional axial fan laterally of dull and stereotyped center, find near the local thermal resistance monotone decreasing of the 0＜y/D in dull and stereotyped center＜0.55, cross the valley that is positioned at y/D～0.55 place, the local thermal resistance on the flat board increases gradually.Radially relatively it is distributed in the thermal resistance value of peak value front and back, finds that the thermal resistance value in dull and stereotyped center is higher than the thermal resistance value in outflow district.
Owing to be affixed on of the disturbance of the small leaf of center hub, cause the thermal resistance valley that impacts on the flat board close to impacting dull and stereotyped center to the axial fan downstream.Than conventional axial-flow fan, the present invention impacts the overall trend that dull and stereotyped local thermal resistance radially distributes and remains unchanged, but numerical value has obvious reduction: in the scope of 0＜y/D＜0.5, thermal resistance has about 10% reduction, this is because additional little flabellum has impelled the interaction that refluxes, thereby has strengthened the heat exchange effect; Scope outside y/D＞0.5, the basic no change of thermal resistance, this is owing to have only the center portion of impacting flat board to be subjected to the disturbing influence of additional small leaf.
According to above analysis as can be known, axial fan of the present invention has the structure characteristic of the little flabellum of attached subsides on center hub, its objective is to overcome the deficiency that conventional axial-flow fan is used for the cooling electronic component management.Can strengthen disturbance by on center hub, introducing little flabellum, thereby strengthen its cooling performance the axial fan exit flow field.Compare with conventional fan, under the constant condition of the dc rated voltage of controlling and driving axial fan, the rotating speed of novel fan has reduced about 9%.Under identical input power, the whole cooling performance that novel axial fan impacts substrate has improved about 10% than conventional axial-flow fan.
Claims (1)
1, a kind of axial fan that is used for cooling electronic component, the primary blades (2) that comprises the wheel hub (1) that is positioned at the fan main body center and be fixed on wheel hub (1) outside, it is characterized in that: on wheel hub (1), also be provided with square attached subsides blade (3), one end of this attached subsides blade (3) is fixedlyed connected with wheel hub (1), and the other end is fixedlyed connected with the trailing edge of primary blades (2); The long 16mm of said attached subsides blade (3), wide 6mm, thick 1.6mm, length overall is that the length that the attached subsides blade (3) of 16mm is affixed on the center hub (1) is 10mm, the length that is affixed on primary blades (2) trailing edge is 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007103077039A CN100560986C (en) | 2007-12-26 | 2007-12-26 | Axial flow fan for heat dissipation of electronic components |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007103077039A CN100560986C (en) | 2007-12-26 | 2007-12-26 | Axial flow fan for heat dissipation of electronic components |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101220816A CN101220816A (en) | 2008-07-16 |
| CN100560986C true CN100560986C (en) | 2009-11-18 |
Family
ID=39630839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007103077039A Expired - Fee Related CN100560986C (en) | 2007-12-26 | 2007-12-26 | Axial flow fan for heat dissipation of electronic components |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100560986C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956729A (en) * | 2010-06-03 | 2011-01-26 | 深圳市傲星泰科技有限公司 | Fan |
| CN104033422B (en) * | 2014-06-12 | 2017-01-04 | 浙江理工大学 | A kind of small axial flow fan of band splitterr vanes |
| CN108868997B (en) * | 2018-06-29 | 2020-08-04 | 陈科 | Heat radiator for be used for automobile engine |
| CN108910028A (en) * | 2018-07-26 | 2018-11-30 | 周庆文 | A kind of second level duct power packages and three-level or multistage duct power packages with it |
| AT17059U1 (en) | 2020-02-11 | 2021-04-15 | Thomas Euler Rolle | Axial fan |
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2007
- 2007-12-26 CN CNB2007103077039A patent/CN100560986C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101220816A (en) | 2008-07-16 |
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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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20111226 |