CN2414234Y - Composite blade for electric fan - Google Patents

Abstract

The utility model relates to a composite blade for an electric fan, which comprises a hub part and a plurality of axial flow blades which are annularly arranged out of the hub part. A plurality of centrifugal type blades are annularly arranged out of the axial flow blades, and at least an annular part is connected between the axial flow blades and the centrifugal type blades. The utility model is provided with centrifugal type blades and axial flow blades simultaneously so as to increase heat radiation area and heat radiation effect.

Description

The combined type flabellum of electric fan

The utility model is the combined type flabellum of the flabellum about a kind of electric fan, particularly a kind of electric fan.

Figure 1A is a schematic perspective view, shows a known axial flow flabellum 10, comprises a hub portion 11, and it rotates in order to be fixed in a running shaft (figure does not show), and most shafts streaming blade 12, and it is around being arranged at hub portion 11 peripheries.

Because the axial flow flabellum has advantages such as simple structure, air quantity are big, so general electronic equipment as desktop computer or notebook computer etc., uses the axial flow electric fan to come to dispel the heat to whole computer apparatus or to the single electronic element in the computer apparatus more.Figure 1B is a schematic representation, shows the situation that the known axial flow flabellum among Figure 1A cooperates with electronic component.In Figure 1B, in order to increase the efficient of heat radiation, radiating fin 40 is set in electronic component 50 tops to increase the area of heat radiation, 10 of axial flow flabellums are arranged at electronic component 50 and radiating fin 40 tops.

Arrow A is then represented the flow direction of air after axial flow flabellum 10 drives.Air is after axial flow flabellum 10 flows out, and it flows out the upper surface that direction is perpendicular to electronic component 50, so can turn to the periphery of electronic component 50 to spread again, shown in the arrow A among Fig. 1 after arriving electronic component 50 when air-flow.

The shortcoming of this kind design, for when the area of electronic component 50 is big, the radiating effect of its peripheral portions can be partly poorer than the center.This be since air-flow after the upper surface near electronic component 50 turns to side again, its speed that flows can reduce, and air-flow is just to turn to side after absorbing center heat partly, so radiating efficiency decline.As desire head it off, and must shown in Fig. 1 C, use the bigger axial flow flabellum 10 ' of volume, make whole electronic component 50 can directly receive the air-flow that axial flow flabellum 10 ' is blown out, and then promote the radiating efficiency of radiating fin 40.Yet because the increase of flabellum volume, the cost of its material and manufacturing also certainly will promote thereupon, and in addition, because the increase of flabellum volume, the bigger space of also essential reservation is with the bigger flabellum of receiving volume.

In addition, for axial flow flabellum 10 itself,, make the outer rim place of each axial--flow blading 12 all form eddy current, and produce noise in the running because axial--flow blading 12 can cause flow field radially when the cutting flow field unavoidablely.

At the problems referred to above, the purpose of this utility model is to provide a kind of combined type flabellum of electric fan, its can be simultaneously to axially and the centrifugal direction air-out, and fan volume that can be less reaches bigger air-out scope, so heat diffusion area is wider.

For reaching above-mentioned purpose, the utility model provides a kind of combined type flabellum of electric fan, comprises a hub portion, and it is characterized in that: it also comprises:

Most shafts streaming blade is located on this hub portion outside; And

A most centrifugal blade are located on this most shafts streaming blade outside.

The combined type flabellum of described electric fan is characterized in that: more comprise: at least one ring part, this ring part are to be connected between this most shafts streaming blade and this majority centrifugal blade.

The utility model also provides a kind of combined type flabellum of electric fan, comprises a hub portion; It is characterized in that: it also comprises:

A most centrifugal blade are located on this hub portion outside; And

Most shafts streaming blade is located on this majority centrifugal blade outside.

The combined type flabellum of described electric fan is characterized in that: also comprise:

At least one ring part is to be connected between this majority centrifugal blade and this most shafts streaming blade.

The combined type flabellum of electric fan of the present utility model is because it has centrifugal flabellum and axial--flow blading simultaneously, so can increase the area and the radiating effect of heat radiation to the centrifugal direction air-out.Arranged outside at axial--flow blading has ring part, so can reduce the eddy current that the axial--flow blading outer rim forms, the noise when reducing its running.

The combined type flabellum of electric fan of the present utility model is because it has centrifugal blade, so can smaller volume reach bigger heat diffusion area.

The drawing explanation of accompanying drawing:

Figure 1A is known axial flow flabellum schematic perspective view.

Figure 1B is the situation schematic representation that known axial flow flabellum cooperates with electronic component.

Fig. 1 C is the situation schematic representation that another kind of known axial flow flabellum cooperates with electronic component.

Fig. 2 A is the schematic perspective view of a kind of preferred embodiment of the present utility model.

Fig. 2 B is the schematic perspective view of another kind of preferred embodiment of the present utility model.

Fig. 2 C is the schematic representation that combined type flabellum of the present utility model cooperates with electronic component.

The schematic representation of Fig. 3 for showing that preferred embodiment of the present utility model cooperates with radiating fin on the electronic component.

Fig. 4 is the schematic representation that the axial--flow blading in the combined type flabellum of the utility model preferred embodiment adopts the multistage blade.

Preferred embodiment is described in further detail to the utility model hereinafter with reference to relevant drawings.

With reference to Fig. 2 A, the combined type flabellum 20 of electric fan of the present utility model, comprise a hub portion 21, most shafts streaming blade 22, a ring part 23 and most centrifugal blades 24, wherein most shafts streaming blade 22 is to be located on this hub portion 21 outsides, a most centrifugal blade 24 are located on this axial--flow blading 22 outsides, and 23 of ring parts are connected between most shafts streaming blade 22 and the most individual centrifugal blade 24.Through planting design thus, except axial air-flow, also can produce outside the air-flow of centrifugal direction at the side of combined type flabellum 20, in the arranged outside of axial--flow blading 22 ring part 23 is arranged, so can reduce the eddy current that the axial--flow blading outer rim forms, the noise when reducing its running.

With reference to Fig. 2 B, another kind of combined type flabellum 30 of the present utility model, comprise a hub portion 31, most shafts streaming blade 32, two ring parts 33 and most centrifugal blades 34, wherein most centrifugal blades 34 are that ring is established this hub portion 31 outsides, 32 in most shafts streaming blade is located on this centrifugal blade 34 outsides, and 33 of ring parts are connected between most centrifugal blades 34 and the most shafts streaming blade 32.The effect of this kind design is identical with combined type flabellum 20 among Fig. 2 A, so repeat no more.

Fig. 2 C shows the situation that the combined type flabellum of the utility model preferred embodiment cooperates with electronic equipment.When whole combined type flabellum 20 rotates, because combined type flabellum 20 has centrifugal blade, so can direction as shown by arrow B spread feasible enlarged areas of dispelling the heat toward the outside at the air-flow of its peripheral portions.So because the air-flow that blows out from flabellum can directly arrive the peripheral portions of electronic component, so can improve in the known techniques, the peripheral portions radiating efficiency of electronic component relatively poor problem.Certainly, the situation of combined type flabellum 30 is similar to combined type flabellum 20, also can improve the relatively poor problem of radiating efficiency of known techniques.

In fact, because centrifugal blade can be directed at air-flow the side of combined type flabellum, thus can be according to these characteristics, the heat dissipation element that design is mated is more to promote radiating efficiency.With reference to Fig. 3, because centrifugal blade 24 can be directed at the side of combined type flabellum 20 with air-flow, so can be that central part is lower with the shaped design of radiating fin 40 as shown by arrow C, peripheral part is higher, and with whole combined type flabellum 20 be installed in Heat sink 40 central authorities than lower part.Like this, the wind by combined type flabellum 20 sides blow out can blow to the Heat sink that is positioned at its side, uses the radiating efficiency of more promoting the electronic component 50 of Heat sink 40 belows.Certainly, the situation of combined type flabellum 30 is similar to combined type flabellum 20, also can reach identical effect.

The axial--flow blading of combined type flabellum of the present utility model also can be designed to the multistage blade, the noise that is produced when using steady flow condition and reducing fan running.With reference to Fig. 4, the axial--flow blading of combined type flabellum 20 of the present utility model is divided into the first axial--flow blading portion 221 and the second axial--flow blading portion 222, wherein the first axial--flow blading portion 221 is around the outside that is connected in hub portion 21, the second axial--flow blading portion 222 is around being arranged at the first axial--flow blading portion, 221 outsides, and be provided with ring part 223 between an axial--flow blading between the first axial--flow blading portion 221 and the second axial--flow blading portion 222, to connect the first axial--flow blading portion 221 and the second axial--flow blading portion 222.By this kind design, can further reduce combined type flabellum of the present utility model noise in the running, also can more strengthen the structure of combined type flabellum of the present utility model.

Claims (4)

1, a kind of combined type flabellum of electric fan comprises a hub portion, and it is characterized in that: it also comprises:

Most shafts streaming blade is located on this hub portion outside; And

A most centrifugal blade are located on this most shafts streaming blade outside.

2, the combined type flabellum of electric fan as claimed in claim 1 is characterized in that: more comprise: at least one ring part, this ring part are to be connected between this most shafts streaming blade and this majority centrifugal blade.

3, a kind of combined type flabellum of electric fan comprises a hub portion; It is characterized in that: it also comprises:

A most centrifugal blade are located on this hub portion outside; And

Most shafts streaming blade is located on this majority centrifugal blade outside.

4, the combined type flabellum of electric fan as claimed in claim 3 is characterized in that: also comprise:

At least one ring part is to be connected between this majority centrifugal blade and this most shafts streaming blade.

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