TWI429381B - Cooling fan and blades thereof - Google Patents

Description

Cooling fan and its fan blades

The invention relates to a heat dissipation fan, in particular to a fan blade of a heat dissipation fan.

With the rapid development of the computer industry, the CPU pursues high speed, and the heat dissipation problem caused by high functionality and miniaturization is becoming more and more serious, which is more prominent in electronic devices such as notebook computers with small internal space. If the heat generated by the electronic components such as the CPU in the notebook cannot be dissipated in a timely and effective manner, the working performance of the electronic components will be greatly affected, and the service life of the electronic components will be reduced, so that the electronic components must be dissipated.

At present, in the computer, a heat dissipation module composed of a heat conductor, a heat pipe, a heat sink and a heat dissipation fan is often used to dissipate heat from the electronic components. The heat conductor is attached to the electronic component, and the heat conductor and the heat sink are connected by a heat pipe, and the airflow generated by the heat dissipation fan blows the heat sink and exchanges heat with the heat sink to finally dissipate the heat. Therefore, the cooling fan plays an extremely important role in the heat dissipation module.

The air volume of the cooling fan has a great influence on the heat dissipation effect of the heat dissipation module. The conventional method of increasing the air volume of the cooling fan generally includes increasing the blade size or increasing the rotation speed of the cooling fan, etc., however, the increase of the blade size and the rotation speed often leads to The noise of the cooling fan is increased.

In view of this, it is necessary to provide a cooling fan having a large air volume and a small fan noise and its blades.

A fan blade includes a hub and a plurality of blades radially distributed around the hub, the blade having a windward surface and a leeward surface opposite the windward surface, the windward and leeward surfaces respectively having a distance from the hub The end portion, the windward surface and the end portion of the leeward surface are different types of surfaces, the end of the windward surface is a forward inclined surface, and the end of the leeward surface is a back inclined surface.

A cooling fan includes a base, an upper cover that is disposed on the base, and a stator and a blade between the base and the upper cover, the blade includes a hub and a plurality of blades radially distributed around the hub, the blade Having a windward side and a leeward side opposite to the windward side, the windward side and the leeward side respectively have an end portion away from the hub, and the end portions of the windward side and the leeward side are different types of surfaces, The end of the windward side is a forwardly inclined surface, and the end of the leeward side is a rearwardly inclined surface.

The windward surface and the leeward side of the cooling fan are different types of surfaces, and the different characteristics of the end faces of the windward surface and the leeward surface are used to make a large amount of air while generating a large amount of air during operation. .

10‧‧‧ cooling fan

12‧‧‧Base

14‧‧‧Upper cover

16, 26, 36‧‧‧ fan leaves

122‧‧‧ channel

124‧‧‧air outlet

162‧‧ wheels

164, 264, 364‧‧‧ leaves

164a, 264a, 364a‧‧‧ windward

164b, 264b, 364b‧‧‧ leeward

1641, 2641, 3641, 1642, 2642, 3642‧‧‧ end

1 is a perspective exploded view of a preferred embodiment of a heat dissipation fan of the present invention.

Figure 2 is a plan view of the blade of Figure 1.

Figure 3 is a top plan view of another preferred embodiment of the blade of the present invention.

Figure 4 is a plan view of yet another preferred embodiment of the blade of the present invention.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 , the cooling fan 10 includes a base 12 , an upper cover 14 disposed on the base 12 , and a stator (not shown) and a blade 16 between the base 12 and the upper cover 14 .

The blade 16 includes a hub 162 and a plurality of blades 164 extending radially outwardly from the periphery of the hub 162. A channel 122 is formed between the free end of the blade 164 and the inner surface of the sidewall of the base 12. When the heat dissipation fan 10 is in operation, the blade 16 rotates in a counterclockwise direction to drive the airflow to the air outlet 124 of the heat dissipation fan 10.

Referring to FIG. 2 together, the blade 164 has a windward surface 164a and a leeward surface 164b opposite the windward surface 164a.

The windward surface 164a of the vane 164 has an end portion 1641 that is remote from the hub 162. The end portion 1641 is a forwardly inclined surface that extends in a direction of rotation of the blade 16. The leeward face 164b of the blade 164 has an end portion 1642 that is remote from the hub 162, the end portion 1642 being a flat surface.

In this embodiment, the windward surface 164a of the blade 164 and the end portions 1641 and 1642 of the leeward surface 164b are respectively a forwardly inclined surface and a plane, so that the blade 16 has a flat end during operation and at the same time. Compared with the fan blades of the leeward side, the windward surface can generate a larger air volume, and has less noise than the fan blades of the windward and leeward sides of the forwardly inclined end, so that the heat dissipation wind During the operation of the fan 10, it can generate a large amount of air while also having a small noise.

3 is a top plan view of another preferred embodiment of the blade 26. In this embodiment, the end portion 2641 of the windward surface 264a of the blade 264 is a flat surface, and the end portion 2642 of the leeward surface 264b of the blade 264 is a rearward inclined surface. The sweeping characteristics of the planar surface and the characteristics of the separated air are between the forward-inclined surface and the reclined surface, so that the blade 16 has a windward and leeward side with the rearward end during operation. Compared with the fan blade, a larger air volume can be generated, and the fan blade has a smaller noise than the fan blade having the flat end portion of the windward side and the leeward side, so that the heat radiating fan 10 is in operation. It can produce a large amount of air while also having a small amount of noise.

4 is a top plan view of yet another preferred embodiment of the blade 36. In this embodiment, the end portion 3641 of the windward surface 364a of the blade 364 is a forwardly inclined surface, and the end portion 3642 of the leeward surface 364b of the blade 364 is a rearward inclined surface, so that the cooling fan 10 is Compared with the fan blades of the windward and leeward sides with the rearward end or the flat end, the air volume can be generated during operation and the windward and leeward sides with the forwardly inclined end Compared with the fan blade, it has less noise, so that during the operation of the cooling fan 10, it can generate a large amount of air and also has less noise.

The heat dissipation fan 10 of the above three embodiments, the end portions 1641, 2641, 3641 of the windward faces 164a, 264a, 364a of the blades 16, 26, 36 and the ends 1642, 2642, 3642 of the leeward faces 164b, 264b, 364b Having different types of surfaces, utilizing the ends of the windward faces 164a, 264a, 364a of the blades 16, 26, 36 The different characteristics of the ends 1641, 2641, 3641 and the ends 1642, 2642, 3642 of the leeward faces 164b, 264b, 364b make it possible to generate a large amount of air while operating with less noise.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above is only a preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be covered by the following claims.

16‧‧‧ fan leaves

164‧‧‧ leaves

164a‧‧‧ Windward side

164b‧‧‧ leeward

End of 1641, 1642‧‧

Claims (2)

A fan blade includes a hub and a plurality of blades radially distributed around the hub, the blade having a windward surface and a leeward surface opposite to the windward surface, wherein the windward surface and the leeward surface respectively have A distal end portion of the windward surface and the leeward surface is a different type of surface, the end of the windward surface is a forwardly inclined surface, and the end of the leeward surface is a rearwardly inclined surface. A cooling fan includes a base, an upper cover that is disposed on the base, and a stator and a blade between the base and the upper cover, the blade includes a hub and a plurality of blades radially distributed around the hub, the blade The invention has an upward wind surface and a leeward surface opposite to the windward surface, wherein the windward surface and the leeward surface respectively have an end portion away from the hub, and the end portions of the windward surface and the leeward surface are different types. The surface, the end of the windward surface is a forward inclined surface, and the end of the leeward surface is a back inclined surface.