CN2391037Y

CN2391037Y - Blade structure for axial-flow fan

Info

Publication number: CN2391037Y
Application number: CN 99214116
Authority: CN
Inventors: 林世仁
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-07
Filing date: 1999-06-07
Publication date: 2000-08-09
Anticipated expiration: 2009-06-07

Abstract

The utility model relates to a blade structure for an axial-flow type fan, which comprises a rotating shaft and the specific number of fan blades, wherein the fan blades radially extend on the circumference of the outer side of the rotating shaft and each fan blade is in a vertical shape. A gap is formed below a position where each fan blade is adjacent to the surface of the outer circumference of the rotating shaft in a proper distance, the outer side of each fan blade forms a thick edge section and a ring plate which is slightly in a horizontal shape is connected with the end surface at the bottom side of the thick edge section of each fan blade as the connection. After the rotating shaft motions, external air flow is sucked along the space among the fan blades from top to bottom so that a part of air flow in the gap point can directly enter downwards, the air flow of the thick edge section is immediately blocked by the horizontal ring plate after the air flow enters, and thus, the air flow is outwards blown out at a high speed.

Description

The blade structure of axial flow fan

The utility model relates to a kind of fan, relate in particular to a kind of flabellum of axial flow fan, be meant that a kind of fan is when rotatingshaft rotates, it is mobile to utilize tough of the thicker flabellum of the breach and the outside of side-lower in the thin flabellum of flabellum inboard to cooperate the ring flat-plate of its lower horizontal shape that institute's inhaled air is blowed by below and lateral direction, can shunt the purpose that blows and have good stability to reach.

Electronics technology is maked rapid progress now, and electronic equipment is for asking attractive in appearance, exquisiteness is that the people of related domain are all towards gently, thin, short, little design direction strides forward, but electronic component is more little, the heat energy that itself is produced during its running is high more, for example from computer, electronic instrument, the setting of the radiation fan of Related products such as electrical equipment as can be known, central processing unit (CPU) because of computer inside, the processing rate of computing such as wafer or hard disk or memory cell sharply rises, use and make this kind electronic component also need to do a heat radiation by radiating fin and fan, but the flabellum of the fan that electronics is now used as shown in figure 10, it is the stereogram of a common structure, be general spiral helicine flabellum, also have other to plant axial flow type heat elimination fan and design for vertical type, and various flabellum, mostly be the design of single piece type greatly, but the flow direction of the wind that is caused is all based on unidirectional (as side blown type or bottom blowing type).So when using in different occasion, extremely most designs just make wind direction be blown into or be blown out by different amount with the arrangement of wind conduit or radiating fin, it is higher and can influence the smoothness of the flow velocity of wind that this designs cost not only, no matter so use employed radiator on general electronic equipment or central processing unit (CPU) and wafer, as the flabellum of designing a kind of fan has the shunting action of specific wind direction and does not influence it stability when rotating, the occasion that can be useful in specific wind direction needs is used, so spiral or vertical type of usefulness, the flabellum of axial flow fan remains in more shortcoming, is difficult for forming the shunting effect of special wind direction as the axial flow fan flabellum.

The purpose of this utility model is: design a kind of for shunting the electric fan that uses and have good stability, the plural flabellum that is to utilize the rotatingshaft outer circumference surface of axial flow fan outwards to extend out, and each flabellum inboard all is formed with give the breach of setting shape, and the thick yukeibe bottom side end in the outside is for to be engaged between each flabellum by an all horizontal ring flat-plate, thus when fan the air-flow that sucks above it after the rotation just can by below and outside shunting blow out.Reach with low cost with this, have good stability, and applicable on the product that the need shunting blows out.

The utility model is achieved in that a kind of flabellum of axial flow fan includes on a rotatingshaft and the outer circumference thereof with radial extending and gives fixed number purpose flabellum, wherein each flabellum all is vertical, and each flabellum suitably all has a breach under the distance near rotatingshaft external peripheral surface one, and the outside forms a thick yukeibe and is engaged on the thick yukeibe bottom side end face of each flabellum with a slightly horizontal ring flat-plate.Flabellum can be smooth shape, arc-curved shape or cooperate actual demand and make difformity and change.Described rotatingshaft can be rotor or does the design that other equivalence changes, described flabellum also can below the top of breach further offer relative breach, described horizontal ring flat-plate can be established as a slice or the above interval of a slice, gives fixed number purpose open-work and also can offer on the surface of ring flat-plate.

The beneficial effect that the utility model compared with prior art has is: because the utility model is mainly by the rotatingshaft outboard peripheries place of an axial flow fan, with the radial flabellum that outwards extends out plural number, and make each flabellum be interior narrow outer wide shape, just can form the inboard and have the breach that gives the setting shape, and the outside is a thick yukeibe, be engaged between each flabellum with a watery ring flat-plate by its thick yukeibe bottom side end face again, after with the structure of this flabellum rotatingshaft being rotated, its extraneous air-flow can suck along each flabellum gap from top to bottom, and then a part of air-flow of indentation, there can directly be entered down, the air-flow of its thick yukeibe is being stopped by horizontal ring flat-plate after entering in addition, and then quicken outwardly to blow out, can shunt and blow out to reach fan, and the purpose that has good stability.

Below in conjunction with accompanying drawing the utility model most preferred embodiment is described in detail:

Fig. 1 is a stereo appearance figure of the present utility model

Fig. 2 is a side cutaway view of the present utility model

Fig. 3 is a plan view of the present utility model

Fig. 4 is another an embodiment's of the present utility model plan view

Fig. 5 is an embodiment a plan view more of the present utility model

Fig. 6 is an another embodiment's of the present utility model stereo appearance figure

Fig. 7 is a use embodiment's of the present utility model three-dimensional exploded view

Fig. 8 is a use embodiment's of the present utility model schematic top plan view

Fig. 9 is a use embodiment's of the present utility model generalized section

Figure 10 is the stereogram of the fan of prior art

As Figure 1-3, be stereo appearance figure of the present utility model, plan view and side cutaway view.The central authorities of fan 1 are a rotatingshaft 11, and this rotatingshaft 11 also can be directly be made of the rotor of general axial flow fan 1, rotate in order to the flabellum 12 that drives on the external side brim face, and side-lower one suitable distances are formed with and give the breach 121 of establishing shape (as openings such as square, arcs) in the flabellum 12, breach 121 extends out one thick tough 122 thus again, narrow outer wide shape in even each flabellum 12 all is formed with, and thick yukeibe 122 bottom sides are positioned with the ring flat-plate 13 that all is level, to be connected in 12 of each flabellums, this just forms the utility model unitary construction.

During the utility model action, rotatingshaft 11 rotations of fan 1 are changeed flabellum 12 clockwise, this moment, ambient air was sucked between each flabellum of below by fan 1 top, the air-flow at flabellum 12 positions with breach 121 is blowed downwards, and the air-flow of thick yukeibe 122 stops because of the ring flat-plate 13 of bottom side, the air-flow at this position is blown out fast towards the outside, make the air shunting that enters be blown into two kinds of different direction and dispel the heat.Just can shunt and be blown into the usefulness that specific products is done heat radiation.

The ring flat-plate 13 of thick yukeibe 122 belows of flabellum 12 of the present utility model is with the substantially horizontal setting, but can see that also actual demand does ring flat-plate 13 to change on the angle, with the heat radiation power after increasing it and blowing.

Shown in 4-5, be the plan view of another preferred embodiment of the utility model and an embodiment plan view again, the wherein ring flat-plate 13 visual actual demands of the utility model flabellum 12 belows and it is made interval design more than a slice or offers plural open-work above it, in order to simultaneously can be air-breathing, with the thick yukeibe 122 of flabellum 12 air-flow that sucks made a water conservancy diversion outwardly again and blow and reach heat radiation function by upper and lower.

As shown in Figure 6, stereo appearance figure for the another preferred embodiment of the utility model, the rotatingshaft 11 of its fan 1 also can be general axle center, use in order to the flabellum 12 that drives plural number, and the breach 121 of flabellum 12 inboards of its fan 1 also can be set up a breach 121 uses up, has formed other and has planted mode of execution.

Shown in Fig. 7-9, three-dimensional exploded view for use embodiment of the present utility model, schematic top plan view and generalized section, when using in the heat radiation of the central processing unit (CPU) 4 as fan 1 is used in the computer, make three limits of radiating fin 2 all have a side 21 on every side, and the inboard of each side 21 is the central fin 22 with the different height projectioies of plural number, and the inside of entreating fin 22 hereinto forms a smooth holding part 23, and this holding part 23 is slightly larger than the rotating shaft 11 of fan 1 and a side of not having a side 21 for having an exhaust outlet 25, and the plural water conservancy diversion fin 24 of tool appropriate gap arranged by these exhaust outlet 25 place's bump array, so when the rotatingshaft 11 of fan 1 is positioned at the holding part 23 of radiating fin 2, its inboard breach 121 and ring flat-plate conveniently align for 13 times at low inside and high outside central fin 22, and make the suitable gap of the two formation one, in order to fan 1 see through a loam cake 3 axial region 31 and after making rotatingshaft 11 spinning movements, its ambient air is just sucked by each saturating emptying aperture 32 of loam cake 3, and enter along each flabellum 12 gap, so make its breach 121 place inhaled airs by flabellum 12, can blow towards central fin 22 places of inboard, below, and thick yukeibe 122 inhaled airs stop because of horizontal ring flat-plate 13, institute's inhaled air is blowed outwardly, at this moment, the flow direction of the air that sucks is just divided into towards the below and side-blown is outwardly sent, and the heat energy that is produced during central processing unit (CPU) 4 running all with its central upper surface for the highest, be can directly central processing unit (CPU) 4 be conducted to heat energy that the high heat of central fin 22 and fan 1 rotatingshaft 11 own thereof produce with the air that blows down to do a cooling, and the air that sees through side-blown is taken the heat of three sides 21 and the part air that blows each water conservancy diversion fin 24 place by air outlet 25 out of down.By on know, the flabellum 123 of fan 1 of the present utility model is when being used in the heat radiation purposes of central processing unit (CPU) 4, not only can make the extraneous air flows that sucks balanced more, and central position that can central processing unit (CPU) is the warmmest sees through central fin 22 and does a conduction and spread its heat diffusion area and can directly do a cooling action, formed circulation when cooperating side-blown, just can directly cooled hot air be overflowed by exhaust outlet 25 rapidly, so the utility model only exemplifies a feasible use-case for understanding, but be not therefore and the use of the flabellum 12 of limitation the utility model axial flow fan 1.

Claims

1, a kind of blade structure of axial flow fan, include on a rotatingshaft and the outer circumference thereof and give fixed number purpose flabellum with radial extending out, it is characterized in that: each flabellum all is vertical, and make each flabellum all have a breach near the below of rotatingshaft external peripheral surface one suitable distance, and the outside just forms a thick yukeibe, and is engaged on the thick yukeibe bottom side end face of each flabellum with a slightly horizontal ring flat-plate.

2, blade structure according to claim 1 is characterized in that: described flabellum can be smooth shape, arc-curved shape or cooperate actual demand and make difformity and change.

3, blade structure according to claim 1 is characterized in that: described rotatingshaft can be rotor or does the design that other equivalence changes.

4, blade structure according to claim 1 is characterized in that: described flabellum also can below the top of breach further offer relative breach.

5, blade structure according to claim 1 is characterized in that: the ring flat-plate of described flabellum can be set to a slice or a slice is at interval above.

6, blade structure according to claim 1 is characterized in that: described flabellum ring flat-plate surface also can offer thereon gives fixed number purpose open-work.