CN1230628C - Heat dissipation device and fan blade structure - Google Patents

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

Heat dissipation device and fan blade structure

technical field

The invention relates to a fan blade structure, in particular to a fan blade structure of an axial flow fan.

Background technique

At present, fans for heat dissipation are mainly divided into two types: axial flow fans and centrifugal fans, and the most used ones should belong to axial flow fans. Axial fans are generally suitable for systems with less flow resistance, that is, axial fans have less air pressure.

The prior art axial flow fan, as shown in FIG. 1A , uses a driving device to drive the fan blade 20 to rotate to generate airflow. The obstruction of the casing 10 creates a cyclone 12, as shown in FIG. 1B, thereby reducing the amount of air entering the wind.

Therefore, people have made improvements to the structure of the fan frame to increase the wind pressure, because the rotation of the fan will generate airflow, and when the airflow flows through the ribbed fan frame, it will disturb and form a cyclone 12, resulting in a loss of wind pressure, thereby reducing the airflow of the fan. effectiveness. People improved the rib-shaped fan frame into stationary vanes similar in shape to the rotating rotor blades, so as to reduce the cyclone 12 and increase the wind pressure.

The heat dissipation efficiency of the fan is not only related to the wind pressure, but also has a lot to do with the air inflow of the air inlet.

Contents of the invention

In view of the above defects, the purpose of the present invention is mainly to provide a fan blade structure for increasing the air flow into the wind.

Another object of the present invention is to apply the above fan blade design to a fan with a combination of moving and stationary blades.

In order to achieve the above object, the present invention provides a fan blade structure that can be arranged on a driving device, the fan blade structure at least includes:

a shaft housing; and

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

Wherein the plurality of moving blades extend radially toward the center of the shaft housing along the top of the shaft housing at the air inlet end.

A cooling device, at least comprising:

a frame;

a driving device connected to the fan frame; and

At least one fan blade structure, which is arranged in the fan frame, the fan blade structure includes a shaft housing and several moving blades, wherein the several moving blades are radially connected to the shaft housing with the shaft housing as the center of circle, and the A plurality of moving blades extend radially toward the center of the shaft housing along the top of the shaft housing at the air inlet end.

Since the top surface of the shaft housing of the present invention is lower than the blade edge of the fan blade, side airflow can be introduced through the fan blade to increase the air flow into the wind. Moreover, this design is applied to a fan with a combination of moving and stationary blades to increase the air flow into the wind, thereby improving the performance of the fan.

Brief description of the drawings

The technical solution and other beneficial effects of the present invention will be apparent through the detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

In the attached picture,

FIG. 1A is a schematic diagram of an axial flow fan in the prior art;

Fig. 1B is a cross-sectional view of an axial flow fan in the prior art;

Fig. 2A is a schematic diagram of an axial flow fan according to the first embodiment of the present invention;

Fig. 2B is a sectional view of an axial flow fan according to the first embodiment of the present invention;

3A to 3D are the front view, top view, side view and perspective view of the axial-flow fan blade structure of the first embodiment of the present invention;

4A to 4E are schematic cross-sectional views of five axial-flow fan blade structures according to the first embodiment of the present invention;

Fig. 5A is an axial flow fan with a combination of moving and stationary blades according to the second embodiment of the present invention; and

Fig. 5B is an axial flow fan with a combination of multi-layer moving and stationary blades according to the third embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail.

Aiming at the problem of the above-mentioned air flow into the wind, the present invention provides a new fan blade structural design to increase the air flow into the wind. The first embodiment of the present invention, as shown in Figure 2A and Figure 2B, is characterized by The fan blade 20 connected to the side of the shaft housing 10 extends radially toward the center of the shaft housing 10 along the top of the shaft housing 10 at the air inlet end, and the blade edge is axially higher than the shaft housing 10 and the driving device of the fan . In other words, the top surface of the axle housing 10 is lower than the edge of the fan blade 20 at the air inlet end. It should be noted that the advantage of the design that the top surface of the shaft housing is lower than the blade edge of the fan blade is that it can introduce side airflow through the fan blade to increase the air flow into the wind. Therefore, when the airflow 14 flows near the top surface of the axle housing 10 at the air inlet end, the cyclone 12 (as shown in FIG. 1B ) will not be generated, thereby increasing the airflow volume of the air inlet.

As shown in FIG. 3A to FIG. 3D , the relative position and relationship between the shaft housing 10 and the fan blade 20 of the fan blade device are more clearly expressed from four viewing angles.

In the design of the fan blade, because the fan blade 20 extends radially toward the center of the shaft housing 10 along the top of the shaft housing 10 at the air inlet end, the design of the fan blade 20 has a lot of room for variation, as shown in Figure 4A to As shown in FIG. 4E , the fan blade 20 in the fan blade device shown in FIG. 4A is only connected to the side of the axle housing 10 . In the fan blade device shown in FIG. 4B , the part of the edge of the fan blade 20 that is higher than the top surface of the shaft housing 10 extends above the shaft housing 10 . The difference between the fan blade device in FIG. 4C and FIG. 4B is that the fan blade 20 extends to a part of the blade edge above the top surface of the shaft housing 10 , and has a bevel design. The difference between the fan blade device in FIG. 4D and FIG. 4C is that the fan blade 20 extends to the center (circle center) of the axle housing 10 . Finally, the fan blade device in FIG. 4E is different from FIG. 4D in that the fan blade 20 extends to the center of the axle housing 10 to connect with another symmetrical fan blade 20 .

In practical application, the fan blade device of the present invention can be used for an axial flow fan with a combination of moving blades and stationary blades. In the second embodiment of the present invention, as shown in FIG. 5A, the fan includes a shaft housing 10, a fan blade 20 and The fan frame 30, and the fan frame 30 includes several ribs (not shown). The above-mentioned so-called moving blade is the fan blade 20, and the stationary blade 40 is a modification of the rib. The original function of the rib in the axial flow fan is to support and connect the driving device and the fan blade device in the fan, but the improved modification of the rib After the stator vane 40 is formed, it has the function of pressurization and diversion (for details of the booster diversion device of the stator vane, please refer to Taiwan's new patent, announcement number: 488497). Therefore, in conjunction with the application of the fan blade structure and stator blades of the present invention, the purpose is to increase the air flow rate at the air inlet end through the fan blade structure of the present invention, and to add the pressurization and diversion function of the stator blades, thereby enhancing the fan's performance. overall performance.

In addition, the number of movable blades and stationary blades in an axial flow fan can be more than one set. The third embodiment of the present invention, as shown in FIG. and the air outlet end. The fan blade structure of the present invention is applied to the design of the moving blade at the air inlet end, and the air outlet end is not limited. Of course, the number of moving blades and stationary blades can also be increased, and can be arranged in different orders.

To sum up, it can be seen that the application of the design of the present invention that the shell surface is lower than the fan blades can increase the air flow into the wind by introducing side airflow through the fan blades. If the fan blade design of the present invention is applied to a fan with a combination of moving and stationary blades, on the one hand, the air flow rate of the incoming air will be increased, and on the other hand, the air pressure of the outgoing air will be increased, which can further enhance the overall performance and heat dissipation effect of the fan.

It can be understood that, for those of ordinary skill in the art, other various corresponding changes and modifications can be made according to the technical scheme and technical concept of the present invention, and all these changes and modifications should belong to the appended rights of the present invention. the scope of protection required.

Claims (27)

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.

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