CN101463838A - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
- Publication number
- CN101463838A CN101463838A CNA2007101252885A CN200710125288A CN101463838A CN 101463838 A CN101463838 A CN 101463838A CN A2007101252885 A CNA2007101252885 A CN A2007101252885A CN 200710125288 A CN200710125288 A CN 200710125288A CN 101463838 A CN101463838 A CN 101463838A
- Authority
- CN
- China
- Prior art keywords
- base
- centrifugal cutter
- loam cake
- tongue mouth
- sidewall
- 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.)
- Pending
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a centrifugal fan comprising a base, an upper cover, a stator and a rotor, wherein, the upper cover is arranged on the base, and the stator and the rotor are positioned between the base and the upper cover; the base comprises a baseplate and a side wall upwards extended from the baseplate, a flow passage is formed between the rotor and the side wall of the base, and the side wall is provided with an air outlet; a tongue opening is projected and extended out from the side wall near the air outlet towards the interior of the centrifugal fan, and is provided with a first surface near the flow passage, a second surface far away from the flow passage and a joint face connecting the first surface and the second surface; and at least one part of at least one of the first surface, the second surface and the joint face is slantwise arranged corresponding to the baseplate of the base. Each component element of the inner surface of the tongue opening is slantwise arranged corresponding to the upper surface of the baseplate, thereby disturbing the length of harmonic waves and preventing the formation of the superposition of higher harmonic waves and the noise resonance.
Description
Technical field
The present invention relates to a kind of fan, refer to a kind of centrifugal cutter especially electronic element radiating.
Background technique
Along with developing rapidly of computer industry, CPU pursues high-speedization, and the heat dissipation problem that multifunction and miniaturization are derived is more and more serious, and this is more outstanding in the narrow and small electronic equipment in inner spaces such as notebook computer.If the heats that electronic component produced such as CPU in the notebook computer can't be distributed timely and effectively, will greatly influence the service behaviour of electronic component, also can reduce the working life of electronic component simultaneously, therefore must dispel the heat to electronic component.
In computer, the normal heat radiation module of being made up of thermal conductor, heat pipe, radiating fin and centrifugal cutter that adopts is to electronic element radiating at present.Thermal conductor is attached on the electronic component, and thermal conductor is connected by heat pipe with radiating fin, and the air-flow that centrifugal cutter produces brushes radiating fin and distributes with heat the most at last with radiating fin generation heat exchange.Therefore, centrifugal cutter plays a part very important in the heat radiation module.
Traditional centrifugal cutter comprises fan frame, flabellum and loam cake.The rotating speed of centrifugal cutter is high more, flow velocity is fast more, air quantity is big more, and then the heat with radiating fin exchange is also just more, thereby effectively the heat of electronic component is distributed.Yet this will inevitably cause the noise of centrifugal cutter to increase.
Summary of the invention
In view of this, be necessary to provide a kind of centrifugal cutter with less noise.
A kind of centrifugal cutter, comprise a base, be covered on loam cake and stator between base and loam cake and rotor on the base, described base comprises a base plate and by the upwardly extending sidewall of base plate, form a runner between the sidewall of described rotor and base, described sidewall is provided with an exhaust outlet, described sidewall has protruded out a tongue mouth in the position near exhaust outlet to the inside of centrifugal cutter, described tongue mouth has the first surface near described runner, away from the second surface of described runner and connect described first and second surperficial junction surface, described first surface, in second surface and the junction surface at least one of them distance that protrudes out to the inside of centrifugal cutter change along the short transverse of tongue mouth.
A kind of centrifugal cutter, comprise a base, be covered on loam cake and stator between base and loam cake and rotor on the base, described base comprises a base plate and by the upwardly extending sidewall of base plate, form a runner between the sidewall of described rotor and base, described sidewall is provided with an exhaust outlet, described sidewall has protruded out a tongue mouth in the position near exhaust outlet to the inside of centrifugal cutter, described tongue mouth has the first surface near described runner, away from the second surface of described runner and connect described first and second surperficial junction surface, described first surface, in second surface and the junction surface at least at least a portion of one of them be obliquely installed with respect to the base plate of base.
Compare with the centrifugal cutter that the internal surface of tongue mouth and the upper surface of base plate are perpendicular, the upper surface of the relative base plate of each constituent element of the internal surface of tongue mouth is obliquely installed among the present invention, the length of having upset harmonic wave has hindered the stack of higher harmonics and the formation of noise resonance.The noise that this structural design produces in the time of can reducing fan running, thus the overall performance of fan can be improved.
Description of drawings
Fig. 1 is the decomposing schematic representation of a preferred embodiment of centrifugal cutter of the present invention.
Fig. 2 is the schematic top plan view after centrifugal cutter shown in Fig. 1 removes loam cake.
Fig. 3 is the schematic perspective view of base of second preferred embodiment of centrifugal cutter of the present invention.
Fig. 4 is the schematic perspective view of base of the 3rd preferred embodiment of centrifugal cutter of the present invention.
Fig. 5 is the schematic perspective view of base of the 4th preferred embodiment of centrifugal cutter of the present invention.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is described in further detail.
The claimant utilizes CFD (Computational Fluid Dynamics, computational fluid mechanics) software is constantly tested above-mentioned centrifugal cutter and the flow field simulation discovery, at the flabellum of centrifugal cutter by tongue mouth surround in narrow and small zone the time, be attended by the stack of many higher harmonicss, thereby make the noise at tongue mouth place bigger.Therefore, the inventor inquires into the noise that how to reduce tongue mouth place how to reduce the starting point that is superposed to of tongue port area higher harmonics, and there is birth of the present invention the beginning.
As shown in Figures 1 and 2, described centrifugal cutter 10 comprises a base 12, is covered on loam cake 14 and stator between base 12 and loam cake 14 (figure does not show) and rotor 16 on the base 12.
Described base 12 comprises a base plate 121 and by the sidewall 122 of the upwardly extending volute of base plate 121 peripheries.Be respectively equipped with an intake grill 123 in described base plate 121 and the loam cake 14, offer the exhaust outlet 124 perpendicular on the described sidewall 122 with described intake grill 123.Described exhaust outlet 124 has a nearly wind end 124a and a far away wind end 124b relative with nearly wind end 124a, and when described centrifugal cutter 10 was worked, described rotor 16 driving air-flows flowed to wind end 124b far away by the nearly wind end 124a of exhaust outlet 124.
Described rotor 16 comprises a wheel hub 162 and by several flabellums 164 of the outside radial extension of wheel hub 162 peripheries.122 runners 125 that form an annular of the sidewall of the free end of described flabellum 164 and base 12.The width of described runner 125 increases to nearly wind end 124a gradually along the wind end 124b far away of counterclockwise by exhaust outlet 124.
Described sidewall 122 protrudes out a subtriangular tongue mouth 126 in the position of the wind end 124b far away of close exhaust outlet 124 to the inside of centrifugal cutter 10, and described tongue mouth 126 is one-body molded with sidewall 122 and base plate 121.Described tongue mouth 126 have one near the first surface 126a of runner 125, one away from runner 125 and near the second surface 126b of exhaust outlet 124 and the junction surface 126c that connects described first and second surperficial 126a, 126b.Described first surface 126a is a cambered surface, and the bearing of trend in longshore current road 125 extends.Described second surface 126b is an approximate plane, is appreciated that ground, and described second surface 126b also can be a cambered surface.Described junction surface 126c is the curved surface of smooth connection described first and second surperficial 126a, a 126b.Described first surface 126a near shape between the elongation line of the elongation line of the end of described second surface 126b and the end of the close described first surface 126a of described second surface 126b in an angle, in the present embodiment, described angle is the obtuse angle.
Described first surface 126a, second surface 126b and junction surface 126c constitute the internal surface 126d of tongue mouth 126 jointly, each constituent element of described internal surface 126d is that the upper surface 121a of first surface 126a, second surface 126b and the described relatively base plate 121 of junction surface 126c is obliquely installed, and the each several part that makes described tongue mouth 126 is that the distance edge that protrudes out in the space that internal surface surrounded of sidewall 122 is reduced gradually by the direction of base plate 121 to loam cake 14 to the inside of centrifugal cutter 10.
Compare with the centrifugal cutter that the internal surface of tongue mouth and the upper surface of base plate are perpendicular, the present invention adopts three-dimensional slope shape tongue mouth 126, the upper surface 121a of the relative base plate 121 of each constituent element of the internal surface 126d of tongue mouth 126 is obliquely installed, the length of having upset harmonic wave has hindered the stack of higher harmonics and the formation of noise resonance.This structural design can reduce the noise that produces when centrifugal cutter 10 turns round, thereby can improve the overall performance of centrifugal cutter 10.
In the present embodiment, each constituent element of described tongue mouth 126 is reduced by the direction of base plate 121 to loam cake 14 gradually to the distance edge that protrudes out of the inside of centrifugal cutter 10.Be appreciated that ground, each constituent element of described tongue mouth 126 to the inside of centrifugal cutter 10 protrude out distance also can be along increasing (as shown in Figure 3) gradually to the direction of loam cake 14 by base plate 121, perhaps reduce (as shown in Figure 4) gradually to the direction of base plate 121 and loam cake 14 respectively by the middle part 126e of the height of tongue mouth 126, perhaps increase (as shown in Figure 5) gradually to the direction of base plate 121 and loam cake 14 respectively by the middle part 126e of the height of tongue mouth 126, each constituent element of tongue mouth 126 is changed to the protruding out apart from the short transverse along tongue mouth 126 of inside of centrifugal cutter 10, in other words, the upper surface 121a of the relative base plate 121 of internal surface 126d of each constituent element of tongue mouth 126 is obliquely installed.
In the present embodiment, each constituent element of described tongue mouth 126 all changes along the short transverse of tongue mouth 126 to the distance that protrudes out of the inside of centrifugal cutter 10.Be appreciated that ground, can only make a constituent element of tongue mouth 126 that first surface 126a, the second surface 126b of tongue mouth 126 and one of them protruding out apart from the short transverse along tongue mouth 126 of inside to centrifugal cutter 10 of junction surface 126c are changed, or wherein two constituent elements of tongue mouth 126 are changed to the protruding out apart from the short transverse along tongue mouth 126 of inside of centrifugal cutter 10.
Claims (11)
1. centrifugal cutter, comprise a base, be covered on loam cake and stator between base and loam cake and rotor on the base, described base comprises a base plate and by the upwardly extending sidewall of base plate, form a runner between the sidewall of described rotor and base, described sidewall is provided with an exhaust outlet, described sidewall has protruded out a tongue mouth in the position near exhaust outlet to the inside of centrifugal cutter, described tongue mouth has the first surface near described runner, away from the second surface of described runner and connect described first and second surperficial junction surface, it is characterized in that described first surface, in second surface and the junction surface at least one of them distance that protrudes out to the inside of centrifugal cutter change along the short transverse of tongue mouth.
2. centrifugal cutter according to claim 1 is characterized in that, one of them is increased by the direction of base to loam cake gradually to the distance edge that protrudes out of the inside of centrifugal cutter at least in described first surface, second surface and the junction surface.
3. centrifugal cutter according to claim 1 is characterized in that, one of them is reduced by the direction of base to loam cake gradually to the distance edge that protrudes out of the inside of centrifugal cutter at least in described first surface, second surface and the junction surface.
4. centrifugal cutter according to claim 1 is characterized in that, in described first surface, second surface and the junction surface at least one of them distance that protrudes out to the inside of centrifugal cutter reduce gradually to the direction of base and loam cake respectively by the middle part of tongue mouth.
5. centrifugal cutter according to claim 1 is characterized in that, in described first surface, second surface and the junction surface at least one of them distance that protrudes out to the inside of centrifugal cutter increase gradually to the direction of base and loam cake respectively by the middle part of tongue mouth.
6. centrifugal cutter according to claim 1, it is characterized in that, described exhaust outlet has a nearly wind end and a wind end far away, and the air-flow that described centrifugal cutter produces blows to wind end far away at the exhaust outlet place by described nearly wind end, and described tongue mouth is near the wind end far away of exhaust outlet.
7. centrifugal cutter, comprise a base, be covered on loam cake and stator between base and loam cake and rotor on the base, described base comprises a base plate and by the upwardly extending sidewall of base plate, form a runner between the sidewall of described rotor and base, described sidewall is provided with an exhaust outlet, described sidewall has protruded out a tongue mouth in the position near exhaust outlet to the inside of centrifugal cutter, described tongue mouth has the first surface near described runner, away from the second surface of described runner and connect described first and second surperficial junction surface, it is characterized in that described first surface, in second surface and the junction surface at least at least a portion of one of them be obliquely installed with respect to the base plate of base.
8. centrifugal cutter according to claim 7 is characterized in that, one of them is increased by the direction of base to loam cake gradually to the distance edge that protrudes out of the inside of centrifugal cutter at least in described first surface, second surface and the junction surface.
9. centrifugal cutter according to claim 7 is characterized in that, one of them is reduced by the direction of base to loam cake gradually to the distance edge that protrudes out of the inside of centrifugal cutter at least in described first surface, second surface and the junction surface.
10. centrifugal cutter according to claim 7 is characterized in that, in described first surface, second surface and the junction surface at least one of them distance that protrudes out to the inside of centrifugal cutter reduce gradually to the direction of base and loam cake respectively by the middle part of tongue mouth.
11. centrifugal cutter according to claim 7 is characterized in that, in described first surface, second surface and the junction surface at least one of them distance that protrudes out to the inside of centrifugal cutter increase gradually to the direction of base and loam cake respectively by the middle part of tongue mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101252885A CN101463838A (en) | 2007-12-21 | 2007-12-21 | Centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101252885A CN101463838A (en) | 2007-12-21 | 2007-12-21 | Centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101463838A true CN101463838A (en) | 2009-06-24 |
Family
ID=40804564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101252885A Pending CN101463838A (en) | 2007-12-21 | 2007-12-21 | Centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101463838A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518603A (en) * | 2011-12-19 | 2012-06-27 | 海尔集团公司 | Fan of range hood and range hood provided with same |
| CN103089706A (en) * | 2011-10-31 | 2013-05-08 | 富瑞精密组件（昆山）有限公司 | Cooling fan |
-
2007
- 2007-12-21 CN CNA2007101252885A patent/CN101463838A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089706A (en) * | 2011-10-31 | 2013-05-08 | 富瑞精密组件（昆山）有限公司 | Cooling fan |
| CN103089706B (en) * | 2011-10-31 | 2016-10-12 | 富瑞精密组件（昆山）有限公司 | Radiator fan |
| CN102518603A (en) * | 2011-12-19 | 2012-06-27 | 海尔集团公司 | Fan of range hood and range hood provided with same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101725573B (en) | Centrifugal fan | |
| US7492588B2 (en) | Heat dissipation apparatus with porous type heat dissipater | |
| CN101372987B (en) | Fan vane structure and centrifugal fan having the same | |
| US8267158B2 (en) | Thermal module | |
| CN100529413C (en) | Centrifugal fan, heat radiation device possessing the centrifugal fan and electronic device using the heat radiation device | |
| US9322408B2 (en) | Centrifugal fan | |
| CN101672299B (en) | Eccentric fan | |
| CN101725574A (en) | Centrifugal fan | |
| CN102996516A (en) | Electronic device and heat dissipation module and centrifugal fan thereof | |
| CN101571739A (en) | Notebook computer and radiating device thereof | |
| CN101586575A (en) | Centrifugal cutter and use the electronic equipment of this centrifugal cutter | |
| CN101338770B (en) | Centrifugal fan | |
| CN101581958A (en) | Notebook PC with radiating device | |
| US9145895B2 (en) | Heat dissipation fan | |
| CN101413515A (en) | Centrifugal fan | |
| CN101463838A (en) | Centrifugal fan | |
| CN108869389B (en) | Fan blade structure and centrifugal fan | |
| CN103486085A (en) | Centrifugal fan | |
| US7080970B2 (en) | Housing for axial flow heat-dissipating fan | |
| CN101392762B (en) | Centrifugal fan | |
| US20090169373A1 (en) | Centrifugal blower and bottom housing thereof | |
| CN201312471Y (en) | Wind guide cap | |
| TWI321442B (en) | Centrifugal blower, heat dissipating apparatus having the centrifugal blower and electronic assembly incorporating the heat dissipating apparatus | |
| CN1880775A (en) | Radiating mould assembly with double fan | |
| TWI444537B (en) | Centrifugal fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090624 |