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Rotor for a cooling fan

a cooling fan and rotor technology, applied in the direction of pump components, piston pumps, non-positive displacement fluid engines, etc., can solve the problems of noise, heat generation, and heat generation of electrical units such as cpus (central processing units) or power supplies in various electrical machines, and achieve the effect of avoiding nois

Inactive Publication Date: 2006-08-10
HSIEH HSIN MAO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The main goal of this invention is to create a rotor for a cooling fan that can reduce noise when the fan is running."

Problems solved by technology

Generally, electrical units such as CPUs (Central Processing Unit) or power supplies in various electrical machines give rise to heat when operating.
Because there is no airflow guiding means provided in the conventional cooling fan, the airflow may collide with interior components of the cooling fan (30) thereby generating a noise during operation of the cooling fan (30).

Method used

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  • Rotor for a cooling fan
  • Rotor for a cooling fan
  • Rotor for a cooling fan

Examples

Experimental program
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Embodiment Construction

[0017] With reference to FIGS. 1-2, a rotor (10) for a cooling fan comprises a hollow hub (11), and multiple evenly-placed vanes (12) formed around a periphery of the hollow hub (11) and extending radially. Each of the vanes (12) has a notch (13) defined in an edge thereof and adjacent to an outer periphery of the hollow hub (11). The hollow hub (11) has an opening end defined at a lower end thereof, a permanent magnet received in an interior thereof, and a rod (111) axially provided in a center thereof and extending downwards.

[0018] With reference to FIG. 3, a bevel (131) is formed on a bottom of each notch (13). In this embodiment, the notch (13) is defined at a top edge of each vane (12). In another preferred embodiment of the present invention, the notches (13) can be defined in bottom edges of the respective vanes (12). Furthermore, the notches (13) are defined adjacent to the outer periphery of the hollow hub (11), so that an area of a middle portion and distal portion of eac...

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PUM

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Abstract

A rotor for a cooling fan has a hollow hub having an open lower end. A permanent magnet is received in the hub. A rod is received in the hub and extends downwards. Multiple vanes are evenly formed around the periphery of the hollow hub and extend radially. Multiple notches are respectively defined at edges of the vanes and adjacent to the hollow hub. When the airflow is compressed by the rotation of the vanes, the airflow can be led to a desired direction via the notches. Whereby, the pressures between adjacent vanes are even thereby preventing the collision between the airflow and interior components of the cooling fan, so that the noise is avoided.

Description

BACKGROUND OF THF INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a rotor for a cooling fan, and more particularly to a rotor which can avoid noise when operating. [0003] 2. Description of Related Art [0004] Generally, electrical units such as CPUs (Central Processing Unit) or power supplies in various electrical machines give rise to heat when operating. A working efficiency of the electrical units will decrease if the heat is not radiated. Hence, a cooling fan is provided on the electrical units to reduce the temperature. With a substantial steady air output which will not be affected by an external airflow around the fan, a lateral-blowing cooling fan has a good heat radiating effect and is widely used. [0005] With reference to FIGS. 6-7, a conventional lateral-blowing cooling fan (30) comprises a hollow base (31), and a cap (32) defined with an air inlet (321). A chamber (33) is defined in an interior of the hollow base (31) and an air outlet (...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B17/00
CPCF04D29/281F04D29/30F04D29/4213F04D29/666
Inventor HSIEH, HSIN-MAO
Owner HSIEH HSIN MAO