CN101751094A - Centrifugal fan and electronic device using centrifugal fan - Google Patents
Centrifugal fan and electronic device using centrifugal fan Download PDFInfo
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- CN101751094A CN101751094A CN200810306085A CN200810306085A CN101751094A CN 101751094 A CN101751094 A CN 101751094A CN 200810306085 A CN200810306085 A CN 200810306085A CN 200810306085 A CN200810306085 A CN 200810306085A CN 101751094 A CN101751094 A CN 101751094A
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- centrifugal fan
- base plate
- blade
- impeller
- air intake
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Abstract
The invention provides a centrifugal fan and an electronic device using the centrifugal fan. The centrifugal fan comprises a bottom plate, an impeller and a lateral plate. The impeller is arranged on the bottom plate, the bottom plate is surrounded by the lateral plate, the impeller comprises a plurality of fan blades, the lateral plate is arranged at the periphery of the impeller in a ring manner, and an air flow channel is formed between the ends of the fan blades and the lateral plate. The position of the bottom plate corresponding to the impeller is sunken to form a sunken part, so as to increase the setting height of the fan blades and improve the air sweeping performance of the fan, thereby improving the radiating performance of the electronic device using the centrifugal fan.
Description
Technical field
The present invention relates to a kind of centrifugal fan, particularly relate to a kind of electronic installation that uses this centrifugal fan to the heat-generating electronic elements heat radiation.
Background technology
Along with people more and more pay attention to quality of life and taste, also more to attain in perfection for the pursuit of science and technology, light modish electronic installation such as notebook computer also trend towards lightening, sophistication.
Yet, when the pursuit electronic installation is lightening, the power of heat-generating electronic elements is also constantly improving, the heat that is produced in order in limited space, to take away system efficiently, and industry mainly adopts by the mode of radiating fin group, heat pipe and centrifugal fan combination and dispels the heat at present.The heat conduction path of this mode is: the heat that CPU produces reaches the radiating fin group through heat pipe, and the air-flow that is produced by the centrifugal fan heat that will reach the radiating fin group is taken away again, so centrifugal fan has very large influence to the heat dispersion of system.
Centrifugal fan in the existing notebook computer generally includes a base plate and an impeller, this impeller is located on the base plate, the outer rim of this base plate extends upward the side plate that forms a wound impeller, and corresponding impeller place is provided with an air intake vent on this base plate, and this side plate is provided with an air outlet.After this impeller sets installed on the base plate, this impeller needed to possess a segment distance with this base plate, did not interfere with base plate to guarantee this impeller to rotate, and sucked air-flow from air intake vent, blew out from air outlet again.
In order to improve the heat dispersion of electronic installation better, the centrifugal fan of heat abstractor is optimized design, also just seem particularly important in the hope of reaching better radiating effect.
Summary of the invention
In view of this, be necessary to provide a kind of centrifugal fan that increases air mass flow, also be necessary to provide a kind of electronic installation that uses this centrifugal fan to promote heat dispersion simultaneously.
A kind of centrifugal fan, comprise a base plate, be located at a impeller on the base plate, and around the side plate of this base plate, this impeller comprises some blades, this side plate is located on the periphery of this impeller, form a gas channel between the end of described blade and the side plate, the corresponding position of described base plate and blade is recessed to form a depressed part downwards, to increase the height that is provided with of blade.
A kind of electronic installation, comprise a casing and be located at the interior centrifugal fan of casing, this casing comprises a loam cake and the lower cover corresponding with this loam cake, this centrifugal fan is located between loam cake and the lower cover, this centrifugal fan comprises a base plate, be located at a impeller on the base plate, and around the side plate of this base plate, this impeller comprises some blades, this side plate is located on the periphery of this impeller, form a gas channel between the end of described blade and the side plate, the corresponding position of described base plate and blade is recessed to form a depressed part downwards, to increase the height that is provided with of blade.
Compared with prior art, the corresponding position of the base plate of above-mentioned centrifugal fan and blade is recessed to form a depressed part downwards, can increase the height that is provided with of blade in the centrifugal fan, and that improves fan sweeps the wind performance, thereby promotes the heat dispersion of heat abstractor.
Description of drawings
With reference to the accompanying drawings, in conjunction with the embodiments the present invention is further described.
Fig. 1 is the three-dimensional exploded view of an embodiment of centrifugal fan of the present invention.
Fig. 2 is the three-dimensional assembly diagram of Fig. 1 when being inverted.
Fig. 3 is the three-dimensional assembly diagram of Fig. 1.
Fig. 4 is that centrifugal fan shown in Figure 1 is located at the side sectional view in the casing.
Fig. 5 is that another centrifugal fan is located at the side sectional view in the casing.
Embodiment
Figure 1 shows that the three-dimensional exploded view of centrifugal fan 10 1 embodiment of the present invention, this centrifugal fan 10 is fit to be assembled in the portable electron devices such as notebook computer, and cooperates a heating radiator that heater element is dispelled the heat.This centrifugal fan 10 comprises a fan frame 11, be located at impellers 12 and in the fan frame 11 is located in the fan frame 11 and is used for drive impeller 12 rotational stator 13.
The side plate 112 of the volute that this fan frame 11 comprises a base plate 111, upwards vertically extended to form by the periphery of this base plate 111.The mediad lower recess of this base plate 111 forms the depressed part 113 of an annular.Please also refer to Fig. 2, this depressed part 113 is circular, and the back side of this base plate 111 is to should outwards protruding depressed part 113 positions.This depressed part 113 comprises one and this base plate 111 parallel annular diapires 1130 and be connected in a sidewall 1131 between these diapire 1130 outer peripheral edges and the base plate 111.This diapire 1130 and base plate 111 are provided with and tool one difference in height at interval in short transverse, and this difference in height can be 0.5mm to 2mm.The central authorities of this diapire 1130 form the air intake vent 114 of a circle, so that extraneous air enters in the space of centrifugal fan 10.Be provided with a support portion 115 in this air intake vent 114.This support portion 115 comprises the circular base slab 1150 of being located at these air intake vent 114 central authorities, from the mediad of this back up pad 1150 a vertically extending center pillar 1151, and be connected in some ribs 1152 between these back up pad 1150 outer peripheral edges and diapire 1130 inner peripherals.The base plate 111 of this back up pad 1150 and this centrifugal fan 10 at grade, promptly this back up pad 1150 is with respect to the setting of not caving in of this base plate 111.Described rib 1152 is tilted to down to diapire 1130 place directions extensions from the outer peripheral edges of this back up pad 1150, thereby is arranged at obliquely vertically in this air intake vent 114.
Please also refer to Fig. 3, this side plate 112 is made into integration by die casting or injection molding way with base plate 111.This side plate 112 is located in the peripheral of this impeller 12 and impeller 12 is enclosed in it.Form the gas channel 14 of a volute between the outer peripheral edges of this side plate 112 and impeller 12.Be provided with an air outlet 118 in a side on this side plate 112.
These impeller 12 correspondences are located at the top of this depressed part 113, and this impeller 12 comprises a wheel hub 120 and is located on some blades 121 of these wheel hub 120 peripheries.This wheel hub 120 comprises the end face 1201 of a circle and the annular wall 1202 that extends to form vertically downward from these end face 1201 peripheries.The inwall of this annular wall 1202 magnet ring 122 that is sticked.One mandrel 123 is extended to form downwards by the middle part of circular end face 1201, this impeller 12 be assemblied in a bearing 124 (Fig. 4) by mandrel 123 thus in be rotatably mounted on the center pillar 1151.This stator 13 is contained in this magnet ring 122, and this stator 13 places on the support portion 115 and is installed in the periphery of center pillar 1151.
Described blade 121 is radial from annular wall 1202 and stretches out, and is obliquely installed along clockwise direction with respect to wheel hub 120.This blade 121 is distributed in the periphery of wheel hub 120 equably, does not rock thereby can not produce when making 12 rotations of this impeller.Each blade 121 comprises second blade part 1212 that first blade part 1211 of close wheel hub 120 reaches away from wheel hub 120.The diameter of the external diameter of described first blade part 1211 and this air intake vent 114 about equally.Each first blade part 1211 is by the peripheral outwards gradually wide position that extends near these air intake vent 114 peripheries of wheel hub 120, and promptly first blade part 1211 height vertically radially outwards increases gradually.Each second blade part 1212 is stretched out by first blade part 1211, this second blade part 1212 constant height vertically, and equal this first blade part 1211 maximum height vertically, described second blade part 1212 is extended to the outer fringe position of the diapire 1130 of close this depressed part 113 by the marginal position near this air intake vent 114, promptly the diameter of the internal diameter of this second blade part 1212 and this air intake vent 114 about equally, and its external diameter is slightly less than the external diameter of diapire 1130.The bottom of described second blade part 1212 is concordant with base plate 111.
Fig. 4 places the side sectional view in the casing 22 of an electronic installation 20 for centrifugal fan 10.This casing 22 can be the shell of portable electron device such as notebook computer, and it comprises a lower cover 220 and a loam cake 222 relative with this lower cover 220.Respectively be provided with another air intake vent 224,226 with air intake vent 114 corresponding positions on this loam cake 222 and the lower cover 220, be introduced in the electronic installation 20, improve heat dispersion with air-flow with the external world.This centrifugal fan 10 is located between this lower cover 220 and the loam cake 222, and wherein the top of the side plate 112 of this centrifugal fan 10 is replaced on the upper surface of lower cover 220.Form certain interval between the diapire 1130 of this depressed part 113 and the lower cover 220.When actual installation, this centrifugal fan 10 also can fall and install, the top of the side plate 112 of centrifugal fan 10 is replaced on the upper surface of lower cover 220, and the diapire 1130 of the depressed part 113 of centrifugal fan 10 is towards loam cake 222, and and the lower surface of loam cake 222 between form certain interval.Because the base plate 111 of this centrifugal fan 10 is provided with this depressed part 113, and the height that makes second blade part 1212 of centrifugal fan 10 increases to concordant with base plate 111, can increase the height that is provided with of second blade part 1212 effectively, that improves fan sweeps the wind performance, thereby guarantees that under the condition that the notebook computer height dimension dwindles the centrifugal fan 10 in the notebook computer has bigger air flow rate.Simultaneously, the setting of this depressed part 113 should be provided with by depressed part 113 12 pairs in impeller, has reduced the bottom of blade 121 and the gap between the base plate 111, can reduce the backflow of the gas in the gas channel 14 of impeller 12 peripheries, thereby promote the heat dispersion of notebook computer.In addition, this depressed part 113 is local evagination with respect to the base plate 111 of this centrifugal fan 10, can not take space bigger in the notebook computer, can be so that the installation of other assemblies in the notebook computer.
In addition, configuring condition according to different notebook computers, this support portion 115 also can be the same with this depressed part 113 with respect to the base plate 111 of this centrifugal fan 10 to the lower recess setting, promptly the diapire 1130 of this back up pad 1150 and rib 1152 and this depressed part 113 at grade, this kind setting can also increase impeller 12 first blade part 1211 the space is set, can make the height of first blade part 1211 increase to identical with the height of second blade part 1212, that further improves this centrifugal fan 10 sweeps the wind performance, can increase stator 13 again, the assembling space of the internals of centrifugal fans 10 such as magnet ring 122 and bearing 124 thereof makes and produces 12 rotations of bigger magnetically-actuated impeller between stator 13 and the magnet ring 122 between the two.
Fig. 5 places the side sectional view in the casing 22 of electronic installation 20 for another centrifugal fan 10.The difference of present embodiment and last embodiment: this centrifugal fan 10 also comprises a cover plate 116 that is covered on this side plate 112, and position corresponding with air intake vent 114 on this cover plate 116 is provided with another air intake vent 117.Form a gap between the loam cake 222 of this cover plate 116 and electronic installation 20.When actual installation, this centrifugal fan 10a also can fall and install, and makes between the lower cover 220 of the cover plate 116 of centrifugal fan 10 and electronic installation 20 and forms a gap.
Claims (10)
1. centrifugal fan, comprise a base plate, be located at a impeller on the base plate, and around the side plate of this base plate, this impeller comprises some blades, this side plate is located on the periphery of this impeller, form a gas channel between the end of described blade and the side plate, it is characterized in that: the corresponding position of described base plate and blade is recessed to form a depressed part downwards, to increase the height that is provided with of blade.
2. centrifugal fan as claimed in claim 1 is characterized in that: described depressed part comprises and a diapire of base plate space and be connected in a sidewall between this diapire and the base plate that the central authorities of this diapire are provided with an air intake vent ringwise.
3. centrifugal fan as claimed in claim 2, it is characterized in that: described centrifugal fan comprises a support portion of being located in this air intake vent, this support portion comprises a back up pad and is connected in the outer peripheral edges of described back up pad and some ribs of air intake vent inner peripheral that this back up pad and this base plate are at grade.
4. centrifugal fan as claimed in claim 3, it is characterized in that: described blade is radial extension, each blade comprises that one first blade part and is by outward extending second blade part of first blade part, each first blade part height vertically increases gradually along the direction of its extension, and each second blade part height vertically is invariable along the direction of its extension.
5. centrifugal fan as claimed in claim 4, it is characterized in that: described diapire is parallel to each other in the form of a ring and with base plate, described first blade part extends to the marginal position near this air intake vent, and described second blade part is extended to the outer fringe position of close this diapire by the marginal position near this air intake vent.
6. centrifugal fan as claimed in claim 2, it is characterized in that: described centrifugal fan comprises a support portion of being located in this air intake vent, this support portion comprises a back up pad and is connected in the outer peripheral edges of described back up pad and some ribs of air intake vent inner peripheral that the diapire of this back up pad and described depressed part at grade.
7. centrifugal fan as claimed in claim 6 is characterized in that: described blade is radial extension, and described diapire is parallel to each other in the form of a ring and with base plate, and described blade extends to the outer fringe position near this diapire.
8. electronic installation, comprise a casing and be contained in the interior centrifugal fan of this casing, this casing comprises a loam cake and a lower cover corresponding with this loam cake, this centrifugal fan is located between loam cake and the lower cover, it is characterized in that: this centrifugal fan is any described centrifugal fan in the aforesaid right requirement 1 to 7.
9. electronic installation as claimed in claim 8 is characterized in that: the top and the loam cake of the side plate of described centrifugal fan are in contact with one another, and this loam cake and the corresponding position of this impeller form an air intake vent.
10. electronic installation as claimed in claim 8 is characterized in that: the top and the lower cover of the side plate of described centrifugal fan are in contact with one another, and this lower cover and the corresponding position of this impeller form an air intake vent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810306085 CN101751094B (en) | 2008-12-10 | 2008-12-10 | Centrifugal fan and electronic device using centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810306085 CN101751094B (en) | 2008-12-10 | 2008-12-10 | Centrifugal fan and electronic device using centrifugal fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101751094A true CN101751094A (en) | 2010-06-23 |
| CN101751094B CN101751094B (en) | 2013-08-21 |
Family
ID=42478145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810306085 Expired - Fee Related CN101751094B (en) | 2008-12-10 | 2008-12-10 | Centrifugal fan and electronic device using centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101751094B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548348A (en) * | 2010-12-28 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Heat abstractor |
| CN103835961A (en) * | 2012-11-23 | 2014-06-04 | 富瑞精密组件（昆山）有限公司 | Cooling fan |
| CN113137387A (en) * | 2021-03-08 | 2021-07-20 | 昆山品岱电子有限公司 | Heat radiation fan for notebook computer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2252794A1 (en) * | 1996-05-07 | 1997-11-13 | Peter Eric Rollo | An impeller and fan incorporating same |
| CN100529413C (en) * | 2006-11-17 | 2009-08-19 | 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 |
-
2008
- 2008-12-10 CN CN 200810306085 patent/CN101751094B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548348A (en) * | 2010-12-28 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Heat abstractor |
| CN103835961A (en) * | 2012-11-23 | 2014-06-04 | 富瑞精密组件（昆山）有限公司 | Cooling fan |
| US9624935B2 (en) | 2012-11-23 | 2017-04-18 | Furui Precise Component (Kunshan) Co., Ltd. | Cooling fan with rotor shaft end abutting polyoxymethylene tube bottom |
| CN113137387A (en) * | 2021-03-08 | 2021-07-20 | 昆山品岱电子有限公司 | Heat radiation fan for notebook computer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101751094B (en) | 2013-08-21 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20130821 Termination date: 20141210 |
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| EXPY | Termination of patent right or utility model |