CN2414234Y - Composite fan blades - Google Patents

Abstract

A compound blade of an electric fan, comprising a hub, a plurality of axial-flow blades arranged outside the hub; a plurality of centrifugal blades arranged outside the plurality of axial-flow blades, and at least one The annular part is connected between the plurality of axial-flow blades and the plurality of centrifugal blades. The utility model has centrifugal fan blades and axial flow blades at the same time, which can increase the heat dissipation area and heat dissipation effect.

Description

Composite fan blades

The utility model relates to a fan blade of an electric fan, in particular to a composite fan blade of an electric fan.

1A is a schematic perspective view showing a conventional axial-flow fan blade 10, including a hub 11 for being fixed to a rotating shaft (not shown) for rotation, and a plurality of axial-flow blades 12, It is arranged around the outer periphery of the hub portion 11 .

Because the axial flow fan blade has the advantages of simple structure and large air volume, general electronic devices, such as desktop computers or notebook computers, use axial flow fans to control the entire computer device or a single electronic device in the computer device. Components dissipate heat. FIG. 1B is a schematic diagram showing the cooperation between the conventional axial-flow fan blade and the electronic components in FIG. 1A . In FIG. 1B , in order to increase the heat dissipation efficiency, the heat sink 40 is disposed above the electronic component 50 to increase the heat dissipation area, and the axial flow fan blade 10 is disposed above the electronic component 50 and the heat sink 40 .

Arrow A indicates the flow direction of the air driven by the axial fan blade 10 . After the air flows out from the axial-flow fan blade 10, its outflow direction is perpendicular to the upper surface of the electronic component 50, so when the airflow reaches the electronic component 50, it turns to the periphery of the electronic component 50 to diffuse, as shown by the arrow in Figure 1 As shown in A.

The disadvantage of this design is that when the area of the electronic component 50 is large, the cooling effect of the peripheral part will be worse than that of the central part. This is because the speed of the airflow will decrease after it approaches the upper surface of the electronic component 50 and then turns to the side, and the airflow will turn to the side after absorbing the heat in the central part, so the heat dissipation efficiency will decrease. To solve this problem, as shown in Figure 1C, a larger axial-flow fan blade 10' must be used, so that the entire electronic component 50 can directly receive the airflow blown by the axial-flow fan blade 10', thereby improving The heat dissipation efficiency of the heat sink 40. However, due to the increase in the volume of the fan blade, the cost of its materials and manufacturing will also increase accordingly. In addition, due to the increase in the volume of the fan blade, a larger space must be reserved to accommodate the larger fan blade.

In addition, for the axial-flow fan blade 10 itself, since the axial-flow blade 12 will inevitably cause a radial flow field when cutting the flow field, the outer edge of each axial-flow blade 12 is Vortex is formed and noise is generated during operation.

In view of the above-mentioned problems, the purpose of this utility model is to provide a compound fan blade of an electric fan, which can discharge air in the axial and centrifugal directions at the same time, and can achieve a larger air discharge range with a smaller fan volume, so the heat dissipation area wider.

To achieve the above purpose, the utility model provides a composite fan blade of an electric fan, which includes a hub, and is characterized in that it also includes:

a plurality of axial-flow blades arranged around the outside of the hub; and

A plurality of centrifugal blades are arranged on the outside of the plurality of axial flow blades.

The compound fan blade of the electric fan is characterized in that it further includes: at least one annular portion, and the annular portion is connected between the plurality of axial flow blades and the plurality of centrifugal blades.

The utility model also provides a compound fan blade of an electric fan, which includes a hub; the feature is that it also includes:

a plurality of centrifugal blades annularly disposed outside the hub; and

A plurality of axial-flow blades are arranged on the outside of the plurality of centrifugal blades.

The composite fan blade of the electric fan is characterized in that it also includes:

At least one annular portion is connected between the plurality of centrifugal blades and the plurality of axial flow blades.

The composite fan blade of the electric fan of the utility model has centrifugal fan blade and axial flow blade at the same time, so it can discharge air in the centrifugal direction, and can increase the heat dissipation area and heat dissipation effect. The annular part is arranged on the outer side of the axial-flow blade, so the vortex formed by the outer edge of the axial-flow blade can be reduced, and the noise during its operation can be reduced.

The composite fan blade of the electric fan of the utility model has a centrifugal blade, so it can achieve a larger heat dissipation area with a smaller volume.

Graphic description of the attached drawings:

FIG. 1A is a perspective view of a conventional axial flow fan blade.

FIG. 1B is a schematic diagram of a conventional axial-flow fan blade cooperating with an electronic component.

FIG. 1C is a schematic diagram of another conventional axial-flow fan blade cooperating with electronic components.

Fig. 2A is a three-dimensional schematic diagram of a preferred embodiment of the present invention.

Fig. 2B is a three-dimensional schematic view of another preferred embodiment of the present invention.

FIG. 2C is a schematic diagram of the combination of the composite fan blade and the electronic components of the present invention.

Fig. 3 is a schematic view showing the cooperation of the preferred embodiment of the present invention with the heat sink on the electronic component.

Fig. 4 is a schematic diagram of multi-stage blades as the axial flow blades in the composite fan blades of the preferred embodiment of the present invention.

The preferred embodiments of the present utility model will be further described in detail below with reference to the relevant drawings.

Referring to Fig. 2A, the composite fan blade 20 of the electric fan of the present utility model includes a hub portion 21, a plurality of axial flow blades 22, an annular portion 23 and a plurality of centrifugal blades 24, wherein a plurality of axial flow blades 22 A ring is disposed outside the hub portion 21 , a plurality of centrifugal blades 24 is disposed outside the axial flow blade 22 , and an annular portion 23 is connected between the plurality of axial flow blades 22 and the plurality of centrifugal blades 24 . Through this design, in addition to the axial airflow, the side of the composite fan blade 20 will also generate centrifugal airflow, and an annular portion 23 is provided on the outer side of the axial flow blade 22, so that the axial flow can be reduced. The vortex formed by the outer edge of the flow blade reduces the noise during its operation.

Referring to Fig. 2B, another compound fan blade 30 of the present utility model includes a hub portion 31, a plurality of axial flow blades 32, two annular portions 33 and a plurality of centrifugal blades 34, wherein a plurality of centrifugal blades 34 The plurality of axial flow blades 32 are arranged around the outer side of the centrifugal blade 34 , and the annular portion 33 is connected between the plurality of centrifugal blades 34 and the plurality of axial flow blades 32 . The effect of this design is the same as that of the composite fan blade 20 in FIG. 2A , so it will not be described again.

FIG. 2C shows the cooperation between the composite fan blade and the electronic device according to the preferred embodiment of the present invention. When the entire composite fan blade 20 rotates, since the composite fan blade 20 has centrifugal blades, the airflow around the composite fan blade 20 will spread outward in the direction shown by arrow B, so that the heat dissipation area will expand. In this way, since the airflow blown from the fan blades can directly reach the peripheral parts of the electronic components, the problem of poor heat dissipation efficiency of the peripheral parts of the electronic components in the prior art can be improved. Of course, the condition of the composite fan blade 30 is similar to that of the composite fan blade 20 , and can also improve the problem of poor heat dissipation efficiency in the prior art.

In fact, since the centrifugal blades will guide the airflow to the side of the composite fan blades, it is possible to design matching cooling elements based on this feature to further improve the cooling efficiency. Referring to Fig. 3, since the centrifugal blade 24 will guide the airflow to the side of the compound fan blade 20 as shown by the arrow C, the shape of the cooling fin 40 can be designed to be lower in the central part and higher in the peripheral part, and The entire composite fan blade 20 is mounted on the lower part of the center of the cooling plate 40 . In this way, the wind blown from the side of the composite fan blade 20 can be blown to the heat dissipation plate located on the side thereof, so as to further improve the heat dissipation efficiency of the electronic components 50 under the heat dissipation plate 40 . Of course, the condition of the composite fan blade 30 is similar to that of the composite fan blade 20 and can also achieve the same effect.

The axial-flow blades of the composite fan blades of the present invention can also be designed as multi-stage blades, so as to stabilize the flow field and reduce the noise generated when the fan is running. Referring to Fig. 4, the axial-flow blade of the composite fan blade 20 of the present invention is divided into a first axial-flow blade part 221 and a second axial-flow blade part 222, wherein the first axial-flow blade part 221 is connected around On the outside of the hub portion 21, the second axial-flow blade portion 222 is arranged around the outside of the first axial-flow blade portion 221, and a The annular portion 223 between the axial flow blades is used to connect the first axial flow blade portion 221 and the second axial flow blade portion 222 . With this design, the noise of the composite fan blade of the present invention can be further reduced during operation, and the structure of the composite fan blade of the present invention can be further strengthened.

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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