CN102562625A

CN102562625A - Fan with cooling device

Info

Publication number: CN102562625A
Application number: CN2010106042635A
Authority: CN
Inventors: 黄立钧
Original assignee: Compucase Enterprise Co Ltd
Current assignee: Compucase Enterprise Co Ltd
Priority date: 2010-12-24
Filing date: 2010-12-24
Publication date: 2012-07-11

Abstract

A fan includes an annular fan frame, and a fan blade located in the fan frame and driven to generate a wind flow that passes through the fan frame downwards. The fan frame has an annular frame body, and a plurality of arc-shaped wind-guiding fins protruding from the inner circumference of the frame body. The fan blade is located in the frame body and has a plurality of blades, and a pressure relief notch that passes through from top to bottom is concavely provided at the connection between the end edge and the rear edge of each blade. The arc-shaped wind-guiding fin can guide the wind flow that passes downwards to generate a vortex-shaped wind flow and is arranged below the fan blade. Through the design of the arc-shaped wind-guiding fin located below the fan blade and the design of the pressure relief notch of the fan blade, the fan of the present invention can increase the wind pressure and wind flow while also having a lower noise value.

Description

Fan

Technical field

The present invention relates to a kind of fan, particularly relate to a kind of radiation fan that is used for electronic equipment.

Background technique

Radiation fan is a sink indispensable in general host computer or the electronic equipment, and in order to improve the radiating effect of fan, also occurs the multiple fan design of stressing to improve wind flow or wind speed on the market successively.The TaiWan, China patent be exactly for M311938 number disclose a kind of can be in order to improve blast and the fan structure that reduces noise.This patent mainly is through establishing many and down extend to the arc stator blade of root edge from its ora terminalis in that fan frame inner peripheral surface is prominent, and stator blade is positioned at the flabellum radial outside, through the setting of stator blade, can improve discharge pressure of fan, and reduces the noise of distinguished and admirable bump fan frame inner peripheral surface.But this kind is provided with the design of stator blade at the flabellum radial outside, and this flabellum external diameter is dwindled relatively, and can reduce the wind flow that produces relatively, still has its shortcoming in the use.

Summary of the invention

The object of the present invention is to provide and a kind ofly have than high wind pressure and wind flow and the lower fan of noise.

Fan of the present invention; Comprise the fan frame of a ring-type that runs through up and down, a motor that is mounted on fan frame axle center; And one be installed on the motor and be arranged in the fan frame and can turned and produce and down run through the distinguished and admirable flabellum of fanning frame by motor; This fan frame has the framework of a ring-type; And multi-disc is based in the wind-guiding fin of the arc sheet of this framework inner peripheral surface spaced apartly respectively along this framework periphery, and this flabellum is arranged in this framework, and has the multi-disc blade; And the ora terminalis of each sheet blade and trailing edge joint are concaved with a release of pressure breach that runs through up and down, and the wind-guiding fin of said arc sheet can produce the whirlpool shape with the distinguished and admirable guiding of down passing through and be arranged at this flabellum below tastefully.

Preferably; Aforesaid fan; Described flabellum comprises that also one is fixed in the blade radial medial extremity and is installed on the bearing on the motor; Each sheet blade has the pressure side of an arcuation extension down, reaches the pressure back side of this pressure side dorsad, and this pressure side and the pressure back side all are concaved with many spaced radials and bend the wind-guiding groove that extends to its trailing edge toward the bearing traversing arc from its leading edge and ora terminalis respectively.

Preferably, aforesaid fan, the wind-guiding groove at the described pressure side and the pressure back side are symmetry shape up and down.

Beneficial effect of the present invention is: the position through below being positioned at this flabellum in this framework is provided with arc sheet wind-guiding fin, and the design of the release of pressure breach of flabellum, can make fan of the present invention when improving blast and wind flow, also with lower level of noise.

Description of drawings

Fig. 1 is an embodiment's of a fan of the present invention stereogram;

Fig. 2 is the worm's eye view of the embodiment of the invention;

Fig. 3 is the plan view of a flabellum of the embodiment of the invention;

Fig. 4 is the side cutaway view of Fig. 3 III-III along the line;

Fig. 5 is the wind flow and the rotation speed relation comparison diagram of the embodiment of the invention and the general fan with same fan frame internal diameter and flabellum size;

Fig. 6 is that the embodiment of the invention concerns comparison diagram with general fan static pressures and wind flow with same fan frame internal diameter and flabellum size;

Fig. 7 is the embodiment of the invention and general fan noise and rotation speed relation comparison diagram with same fan frame internal diameter and flabellum size.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.

Like Fig. 1, shown in 2, the embodiment of fan of the present invention is applicable to be installed in the electronic equipment (figure does not show), and can be distinguished and admirable in order to produce heat radiation.This fan comprises a fan frame 3, a motor 4 that is installed on fan frame 3 axis parts, and a flabellum 5 that is coaxially installed on motor 4 and is arranged in fan frame 3.Because this motor 4 is general member, and numerous types, therefore no longer detail.

This fan frame 3 comprises a ring-type framework 31 that runs through up and down; And multi-disc is based in the arc sheet wind-guiding fin 32 of framework 31 inner peripheral surface root edges spaced apartly along framework 31 peripheries; Wind-guiding fin 32 folds with these framework 31 inner peripheral surfaces that a predetermined angle ground arc is curved to be protruded in the framework 31, and the arc kinking structure of wind-guiding fin 32 can match the distinguished and admirable guiding generation whirlpool shape that down runs through framework 31 is distinguished and admirable.

Like Fig. 2,3, shown in 4, this flabellum 5 is arranged in this framework 31, and is positioned at wind-guiding fin 32 tops, comprises a coaxial bearing 51 that is mounted on this motor 4, and multi-disc is bent the blade 52 of projection at interval toward outer arc from bearing 51 outer circumferential faces.Each sheet blade 52 all has the curved pressure side 521 down of an arc; Reach the pressure back side 522 up of this pressure side 521 dorsad; And has a leading edge 523 that is positioned at windward side and is connected in bearing 51, one this leading edge 523 and be connected in the trailing edge 524 of bearing 51 dorsad; And ora terminalis 525 that is connected in leading

edge

523 and 524 of trailing edges and contiguous framework 31 inner peripheral surfaces; And the pressure side 521 and the pressure back side 522 of this blade 52 are concaved with many spaced radials respectively and bend the wind-guiding groove 526 that extends to trailing edge 524 towards bearing 51 traversing arcs from its leading edge 523 and ora terminalis 525 respectively; And wind-guiding groove 526 is up and down symmetry shape at interval, and in addition, this blade 52 also has a release of pressure breach 527 that also runs through up and down toward sunken inside from its ora terminalis 525 and position, trailing edge 524 boundary.

When present embodiment uses; This motor 4 is energized and drives and after driving flabellum 5 rotations; Along with the rotation of flabellum 5, air can flow into from the leading edge 523 of blade 52 on the pressure side 521, and the air through pressure side 521 can down and backward be squeezed by this pressure side 521 and push blade 52 trailing edges 524 to and break away from ora terminalis 525; Utilize the pressure side 521 of blade 52 and the pressure difference at the pressure back side 522, gas is run through gradually from top to bottom fan frame 3 and produce distinguished and admirable.

At the same time, down when the framework 31, touch wind-guiding fin 32 through the distinguished and admirable meeting in framework 31 inner circumference edges zone, and it is distinguished and admirable to be produced the whirlpool shapes by 32 guidings of arc sheet wind-guiding fin when distinguished and admirable.In addition; Down squeeze at the pressure side 521 of blade 52 and to push away air and produce when distinguished and admirable; Touch the distinguished and admirable guiding that can receive wind-guiding groove 526 simultaneously of pressure side 521; And be guided to centre bearing 51 zones, cause distinguished and admirable flabellum 5 center regions that concentrate on, and improve the distinguished and admirable blast of flabellum 5 center regions relatively.And the guiding of the gas of the wind-guiding groove 526 at the pressure side of blade 52 521 and the pressure back side 522 also can act on flabellum 5 rotation air gaps compensation the time can add the fluency of air blast, and then reduce wind and cut sound and noise (dB) value.

Just; When these flabellum 5 rotations; Down be guided toward fan frame 3 center portions and concentrate, and it is distinguished and admirable to produce big blast, and the distinguished and admirable meeting of part is distinguished and admirable by the whirlpool shape of wind-guiding fin 32 guiding generation spiral surrounding distinguished and admirable peripheries of big blast in the center through the distinguished and admirable meeting of part of fanning frame 3; Through this design, can significantly improve discharge pressure of fan and wind flow.Moreover, because wind-guiding fin 32 is to be positioned at this flabellum 5 belows, but not be positioned at flabellum 5 radial outsides; So need not shorten blade 52 length; Can under the identical situation of fan frame 3 internal diameters, adopt bigger blade 52, and can produce bigger wind flow than the described fan design of this case background technique.

In addition; When air is down pushed by blade 52 pressure sides 521 and when passing with ora terminalis 525 directions toward its trailing edge 524 relatively, the design of release of pressure breach 527 that can be through blade 52 makes to be extruded distinguished and admirable before clashing into framework 31 inner peripheral surfaces toward its ora terminalis 525 directions; Part is distinguished and admirable can disengage from this release of pressure breach 527 in advance; Reduce the wind flow of bump framework 31 inner peripheral surfaces relatively, and then can obviously reduce the noise that distinguished and admirable bump framework 31 is produced, make fan have lower running noise.

Like Fig. 5,6, shown in 7; Present embodiment and the general fan with same fan frame internal diameter and flabellum size are compared, and under same rotational speed, the wind flow that present embodiment produced can be apparently higher than general fan; The noise that produces also can be lower than general fan; And can know that by static pressure-wind flow shown in Figure 6 (P-Q) curve the performance of present embodiment obviously is superior to general fan, can produce preferable radiating effect.

In sum; The design of arc sheet wind-guiding fin 32 is set through the position below being positioned at this flabellum 5 in this framework 31; And the design that is arranged with wind-guiding groove 526 at the pressure side 521 of the blade 52 of this flabellum 5 and the pressure back side 522, flabellum 5 is produced and down run through fan frame 3 distinguished and admirablely can concentrate that to produce big blast distinguished and admirable toward the center, and it is distinguished and admirable to produce the whirlpool shape simultaneously; And whole wind flow also can obviously increase, so fan of the present invention can produce preferable radiating effect.In addition; The release of pressure breach 527 of blade 52 that also can be through this flabellum 5 and the design of wind-guiding groove 526 significantly reduce fan noise, make fan of the present invention when improving blast and wind flow; Also with lower level of noise; And have preferable quality, and can increase the market competitiveness of fan of the present invention relatively, quite convenient and practical.

Claims

1. A fan, comprising a circular fan frame penetrating up and down, a motor mounted and fixed on the axis of the fan frame, and a motor mounted on the fan frame and positioned in the fan frame and capable of being driven by the motor to generate downward penetration The fan blade of the air flow of the fan frame is characterized in that: the fan frame has an annular frame body, and a plurality of arc-shaped air guides protruding from the inner peripheral surface of the frame body at intervals along the periphery of the frame body. fins, the fan blade is located in the frame, and has multiple blades, and a pressure relief notch penetrating up and down is recessed at the connection between the end edge and the rear edge of each blade, and the arc-shaped wind guide fin The sheet is arranged under the fan blade so as to guide the downwardly passing air flow to generate a swirl-like air flow.

2. The fan according to claim 1, wherein the fan blade further comprises a bearing fixed to the radially inner end of the blade and mounted on the motor, and each blade has a downward arc extending pressure surface, and a pressure back facing away from the pressure surface, both the pressure surface and the pressure back are recessed with a plurality of radially spaced air guides extending from the front edge and the end edge toward the bearing direction to the rear edge groove.

3 . The fan according to claim 2 , wherein the pressure surface and the air guiding grooves on the pressure back are vertically symmetrical. 4 .