CN1230628C

CN1230628C - Heat dissipation device and fan blade structure

Info

Publication number: CN1230628C
Application number: CN 02154371
Authority: CN
Inventors: 张楯成; 林国正; 黄文喜
Original assignee: Delta Electronics Inc
Current assignee: Delta Electronics Inc
Priority date: 2002-11-28
Filing date: 2002-11-28
Publication date: 2005-12-07
Anticipated expiration: 2022-11-28
Also published as: CN1504649A

Abstract

A fan blade structure of a heat dissipation device can be arranged on a driving device. The fan blade structure is characterized in that a plurality of movable blades connected to the shaft shell radially extend from the air inlet end to the central position of the shaft shell along the upper part of the shaft shell. The fan blade device can be applied to a fan with a movable blade and a fixed blade combination so as to increase the air flow of the incoming air.

Description

Sink and blade structure thereof

Technical field

The present invention relates to a kind of blade structure, especially relate to a kind of blade structure of axial flow fan.

Background technique

At present the fan of heat radiation mainly is divided into two kinds of forms: axial flow fan and centrifugal fan maximum should belong to axial flow fan and use.Axial flow fan is generally suitable for the less system of flow resistance, that is to say, the blast of axial flow fan is less.

The axial flow fan of prior art; shown in Figure 1A; it drives flabellum 20 rotations with to producing air-flow with drive unit; drive unit is mostly based on motor; the air-flow regular meeting that flows into flabellum 20 at the wind inlet end is subjected to the obstruction of axle housing 10 and produces cyclone 12; shown in Figure 1B, thereby reduced the throughput of inlet air.

Therefore, people make improvements increasing blast at the structure of fan frame because the fan rotation can to and produce air-flow, cyclone 12 then can be upset and form to air-flow at the fan frame of the rib-like of flowing through, and causes air loss, thereby reduce the usefulness of fan.People are improved to the fan frame of rib-like and the similar stator blade of movable vane shape that rotates, and increase blast in order to reduce cyclone 12.

The efficient of fan heat radiation is except having the relation with blast and the air influx of wind inlet also has much relations.

Summary of the invention

At above-mentioned defective, purpose of the present invention mainly provides a kind of blade structure, in order to increase the throughput of inlet air.

Another object of the present invention is the fan that above-mentioned flabellum design is applied to have the combination of sound leaf.

To achieve these goals, the invention provides a kind of blade structure, can be arranged on the drive unit, this blade structure comprises at least:

One axle housing; And

Several pieces movable vanes, it is that the center of circle radially is connected in this axle housing with this axle housing;

Wherein these several pieces movable vanes are done radially extension above this axle housing at the wind inlet end towards the central position of this axle housing.

A kind of sink comprises at least:

One fan frame;

One drive unit is connected in this fan frame; And

At least one blade structure, it is arranged in this fan frame, this blade structure comprises an axle housing and several pieces movable vanes, and wherein these several pieces movable vanes are that the center of circle radially is connected this axle housing with this axle housing, and these several pieces movable vanes are done radially extension above this axle housing at the wind inlet end towards the central position of this axle housing.

Because the end face of axle housing of the present invention is lower than the design of flabellum leaf margin, thus can introduce the side air-flow by flabellum, to increase the throughput of inlet air.And, this design is applied to have the throughput of the fan of sound leaf combination with the increase inlet air, thereby improves the performance of fan.

Brief Description Of Drawings

Below in conjunction with accompanying drawing,, will make technological scheme of the present invention and other beneficial effect apparent by detailed description to preferred embodiment of the present invention.

In the accompanying drawing,

Figure 1A is the schematic representation of the axial flow fan of prior art;

Figure 1B is the sectional drawing of the axial flow fan of prior art;

Fig. 2 A is the schematic representation of a kind of axial flow fan of first embodiment of the invention;

Fig. 2 B is the sectional drawing of a kind of axial flow fan of first embodiment of the invention;

Fig. 3 A to Fig. 3 D be first embodiment of the invention the facing of axial flow blade structure, on look, side-looking and stereogram;

Fig. 4 A to Fig. 4 E is the generalized section of five kinds of axial flow blade structures of first embodiment of the invention;

Fig. 5 A is a kind of axial flow fan with the combination of sound leaf of second embodiment of the invention; And

Fig. 5 B is a kind of axial flow fan with the combination of multilayer sound leaf of third embodiment of the invention.

Embodiment

Hereinafter, will describe the present invention in detail.

Problem at the throughput of above-mentioned inlet air, the invention provides a kind of new blade structure design, increase the throughput of inlet air, the first embodiment of the present invention, shown in Fig. 2 A and Fig. 2 B, the flabellum 20 that is characterized in being connected in axle housing 10 sides is done radially extension above the axle housing 10 at the wind inlet end towards the central position of axle housing 10, and leaf margin is higher than the drive unit of axle housing 10 and fan on axially.In other words, the end face of axle housing 10 is lower than the leaf margin of flabellum 20 at the wind inlet end.What need special instruction is that the design advantage that the end face of this kind axle housing is lower than the flabellum leaf margin is that it can introduce the side air-flow by flabellum, to increase the throughput of inlet air.Therefore, air-flow 14 just can not produce cyclone 12 (shown in Figure 1B), thereby increase the throughput of inlet air near the wind inlet end is flowed through axle housing 10 end faces the time.

Shown in Fig. 3 A to Fig. 3 D, relative position and the relation of the axle housing 10 that comes more clearly to express the flabellum device with 4 visual angles and flabellum 20 respectively.

In the design of flabellum, because flabellum 20 is done radially extension above the axle housing 10 at the wind inlet end towards the central position of axle housing 10, so the design of flabellum 20 has the space of many variations, shown in Fig. 4 A to Fig. 4 E, 20 sides that connect axle housing 10 of flabellum in the flabellum device of Fig. 4 A.The part leaf margin that flabellum 20 is higher than axle housing 10 end faces in the flabellum device of Fig. 4 B extends to axle housing 10 tops.Different is that its flabellum 20 extends to the part leaf margin of axle housing 10 top face, has the oblique angle design for the flabellum device of Fig. 4 C and Fig. 4 B.And the flabellum device of Fig. 4 D and Fig. 4 C different is that its flabellum 20 extends to the center (center of circle) of axle housing 10.Different is that the center that its flabellum 20 extends to axle housing 10 is connected with another symmetrical flabellum 20 for the flabellum device of last Fig. 4 E and Fig. 4 D.

In practical application, flabellum device of the present invention can be used for having the axial flow fan of movable vane and stator blade combination, and second embodiment of the invention is shown in Fig. 5 A, this fan comprises axle housing 10, flabellum 20 and fan frame 30, and comprises several ribs (not drawing) in the fan frame 30.Above-mentioned so-called movable vane is exactly a flabellum 20, and stator blade 40 is exactly the modification of rib, rib original function in axial flow fan, be in order to support be connected fan in drive unit and flabellum device, after but rib improves and is modified to stator blade 40, (details about the forced inducer device of this stator blade please refer to the novel patent in Taiwan, notification number: 488497) to have the function of supercharging water conservancy diversion.Therefore, cooperate the application of blade structure of the present invention and stator blade, its purpose is exactly by the throughput of blade structure of the present invention at wind inlet end increase inlet air, adds the supercharging diversion function of stator blade, thereby adds the overall performance of strong wind fan.

In addition, the movable vane in the axial flow fan and the quantity of stator blade can be not only one group, the third embodiment of the present invention, and shown in Fig. 5 B, it comprises one group of stator blade and two groups of movable vanes lay respectively at wind inlet and air opening end.Blade structure of the present invention is used in the movable vane design of wind inlet end, and air opening end does not then limit.Certainly, the quantity of movable vane and stator blade also can increase again, and can make the permutation and combination on the different order.

In summary, use the design that shell face of the present invention is lower than flabellum, can introduce the throughput that the side air-flow increases inlet air by flabellum.If flabellum design of the present invention is applied to have the fan that the sound leaf makes up, increase the throughput of inlet air on the one hand, increase the blast of giving vent to anger on the other hand, more can add the overall performance and the radiating effect of strong wind fan.

Be understandable that; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to technological scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection domain of accompanying Claim of the present invention.

Claims

1. A cooling device, characterized in that it comprises:

a frame;

A first fan blade structure, which includes a shaft shell and several blades arranged around the periphery of the shaft shell, wherein the inner blade edge of the blade has a vertical end surface or slope and is higher than the shaft shell in the axial direction a top surface, such that air on the top surface of the shaft housing is directed to the bottom end of the blade;

a driving device; and

A bearing part is used for supporting the driving device and the first fan blade structure in the fan frame, and enables the driving device to be coupled in the axle housing.

2. The heat dissipation device according to claim 1, wherein the receiving portion can be connected and fixed in the fan frame by several ribs or vanes.

3 . The heat dissipation device according to claim 2 , wherein the fan frame, the receiving portion, and several ribs or vanes are made by integral injection molding. 4 .

4. The heat dissipation device according to claim 1, wherein at least two of the plurality of blades are connected above the shaft housing.

5 . The heat dissipation device according to claim 1 , wherein the first fan blade structure is disposed at an air inlet end or an air outlet end of the heat dissipation device.

6 . The heat dissipation device according to claim 5 , further comprising a second fan blade structure received by the receiving portion, the structure of which is the same as that of the first fan blade structure. 7 .

7. The heat dissipation device according to claim 6, wherein the first fan blade structure and the second fan blade structure are respectively disposed on opposite sides of the receiving portion.

8. The heat dissipation device according to claim 6, wherein the first fan blade structure and the second fan blade structure are arranged in series in the fan frame.

9. A fan blade structure used in an axial flow fan, characterized in that the fan blade structure at least includes:

a shaft housing including a top surface and a side surface; and

Several blades are radially connected to the side of the shaft housing with the shaft housing as the center;

One of the blade edges of the blade is axially higher than the top surface of the shaft housing.

10 . The fan blade structure according to claim 9 , wherein the parts of the plurality of blades higher than the shaft housing can extend radially from the center of the top surface of the shaft housing. 11 .

11. The blade structure of claim 10, wherein at least two blades are connected to the top surface of the axle housing.

12. The fan blade structure according to claim 9, wherein the fan blade structure is applicable to a fan with several stationary blades.

13. The fan blade structure according to claim 9, characterized in that the fan blade structure can be used in a fan with multiple layers of moving blades and stationary blades.

14. The fan blade structure according to claim 9, wherein an inner edge of the blade has a bevel or a vertical end surface.

15. The fan blade structure according to claim 9, characterized in that, the fan blade structure is placed on the air inlet side or the air outlet side of the axial flow fan.

16. A cooling device, characterized in that it at least comprises:

a frame;

a driving device placed in the fan frame; and

At least one fan blade structure is installed in the fan frame and driven by the driving device. The fan blade structure includes a shaft casing and several blades, wherein the several blades are radially connected to the shaft casing as the center of the circle. In the shaft housing, one blade edge of the blade is higher than the top surface of the shaft housing in the axial direction of the heat sink, and the plurality of blades are at the air inlet end along the upper side of the shaft housing toward the center of the shaft housing Extend radially, wherein the fan blade structure is an axial flow fan blade structure.

17. The heat dissipation device according to claim 16, wherein the fan frame further comprises a plurality of ribs.

18. The heat dissipation device according to claim 16, wherein the fan frame has several vanes to increase the air pressure of the heat dissipation device.

19. The heat sink as claimed in claim 16, wherein an inner edge of the blade has a bevel design.

20. The heat sink as claimed in claim 16, wherein an inner edge of the blade has a vertical end surface.

21. The heat dissipation device according to claim 19, wherein the at least two blades are connected to the axle housing.

22. A heat dissipation device, characterized in that it at least comprises:

a frame; and

At least one fan blade structure is installed in the fan frame. The fan blade structure includes a shaft casing and several blades, wherein the several blades are arranged around the shaft casing, and one of the blade edges of the blade is on its Axially higher than the top surface of the shaft housing so that the air on the top surface of the shaft housing is directed to the bottom end of the blade.

23. The heat dissipation device according to claim 22, wherein the fan frame further comprises a plurality of ribs.

24. The heat dissipation device according to claim 22, wherein the fan frame has several vanes to increase the air pressure of the fan.

25. The heat dissipation device according to claim 22, wherein the at least one fan blade structure is located at an air inlet or an air outlet of the heat dissipation device.

26. The heat sink as claimed in claim 22, wherein an inner edge of the blade has a bevel or a vertical end surface.

27. The heat sink as claimed in claim 22, wherein at least two blades are connected on the surface of the axle housing.