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Combination axial-flow fan

a technology of axial flow and fan, which is applied in the field of fans, can solve the problems of mold stripping, inapplicability to design, and difficulty in satisfying the heat dissipation requirements of modern electronic devices, and achieves the effects of high wind pressure, low noise level characteristics, and high wind capacity

Inactive Publication Date: 2009-06-18
TAIWEI FAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention is a combination axial-flow fan that has separate fan blades and a fan hub assembled together. The fan blades are attached to the fan hub with no gaps between them, resulting in a high wind pressure, capacity, and low noise level. The fan hub has a center connection portion for attaching a fan motor shaft and multiple mounting grooves equiangularly spaced around the periphery. The fan blades have a wedge block at the inner end that can be inserted through the mounting grooves to secure the blades to the fan hub. This design ensures a secure and stable attachment of the fan blades to the fan hub."

Problems solved by technology

However, this design is not applicable due to technical problems in molding technology.
A partial fan blade overlapping arrangement will result in a mold stripping problem after injection molding.
It also tends to cause an insufficient wind pressure problem, which presents difficulties in satisfying heat dissipation requirements of modern electronic devices.

Method used

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Examples

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Embodiment Construction

[0014]With reference to FIGS. 1 and 2, a combination axial-flow fan in accordance with the present invention comprises a fan hub 1 and a plurality of fan blades 2. The fan hub 1 and the fan blades 2 are separately molded from plastics by means of injection molding, and then assembled together for use as an active heat dissipation device for the cooling of an electronic product.

[0015]Referring to FIGS. 1 and 2 again, the fan hub 1 may be made in any of a variety of shapes. According to the present preferred embodiment, the fan hub 1 is shaped like a round cap, having a center connection portion 11 at the center for the connection of the shaft of a fan motor (not shown), and a plurality of mounting grooves 12 equiangularly spaced around the periphery. The mounting grooves 12 can be dovetail grooves extending axially towards the rear side 13 of the fan hub 1 so that each mounting groove 12 has an open end 121 at the rear side 13 of the fan hub 1.

[0016]Referring to FIGS. 1 and 2 again, ...

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Abstract

A high-performance low-noise combination axial-flow fan includes a fan hub that has a center connection portion for the connection of a fan motor shaft and a plurality of mounting grooves equiangularly spaced around the periphery, and fan blades each having a wedge block disposed at the inner end for insertion into one mounting groove to secure the respective fan blade to the fan hub so that the fan blades are radially fastened to the fan hub and no gap is seen between each two adjacent fan blades when viewed from the front side.

Description

BACKGROUND OF THE INVENTION[0001](a) Field of the Invention[0002]The present invention relates to a fan and more particularly, to a combination axial-flow fan for use in a computer or electronic product for forced air convection cooling.[0003](b) Description of the Prior Art[0004]Regular cooler modules are designed for use in electronic and photoelectric products to expel waste heat. A typical conventional cooler module is comprised of a passive heat dissipation device and an active heat dissipation device. A passive heat dissipation device can be a heat sink extruded from copper or aluminum and having multiple radiation fins. An active heat dissipation device can be an axial-flow fan that forces surrounding air to cause convection, thereby lowering the surrounding temperature. A typical conventional axial-flow fan comprises a fan hub 10 and multiple blades 20 integrated into and extending around the periphery of the fan hub 10 (see FIG. 6). By means of controlling a motor to rotate...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01D5/30
CPCF04D29/329F04D29/646F04D29/34F04D25/0613
Inventor YU, CHIEN-CHUN
Owner TAIWEI FAN TECH
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