Cooling fan with internally tapered housing

a cooling fan and tapered technology, applied in the direction of machines/engines, stators, liquid fuel engines, etc., can solve the problems of fan housing liable to sustain abrasion of the inner surface of the fan housing, deformation, and difficulty in separating the fan housing from the mold

Inactive Publication Date: 2011-03-24
FU ZHUN PRECISION IND SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]Generally, the cooling fan includes a stator, a rotor rotatably supported by the stator, and a fan housing surrounding the rotor for guiding the forced airflow through the heat sink. The fan housing usually has a rectangular or annular profile. An inner surface of the fan housing facing the rotor is cylindrical, to avoid interference of the rotor and the fan housing during rotation of the rotor. The fan housing is usually made of plastic, by a process of injection molding. During the molding process, after the fan housing is molded in a mold, it is difficult to separate the fan housing from the mold because the inner surface of the fan housing is cylindrical. As a result, the fan housing is liable to sustain abrasion of the inner surface thereof and / or deformation during the removal process.

Problems solved by technology

During the molding process, after the fan housing is molded in a mold, it is difficult to separate the fan housing from the mold because the inner surface of the fan housing is cylindrical.
As a result, the fan housing is liable to sustain abrasion of the inner surface thereof and / or deformation during the removal process.

Method used

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  • Cooling fan with internally tapered housing
  • Cooling fan with internally tapered housing

Examples

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Embodiment Construction

[0008]The drawing shows a cooling fan according to an exemplary embodiment, the cooling fan including a fan housing 12, a stator 20, a rotor 14, and a pair of bearings 129.

[0009]The fan housing 12 is annular (or cylindrical) and hollow. An air inlet 121 is formed at a top of the fan housing 12, and an air outlet 123 is formed at a bottom of the fan housing 12 opposite to the air inlet 121. The fan housing 12 has an inner surface 124 surrounding the rotor 14. The inner surface 124 converges (tapers) slightly in a downward direction, i.e., the inner surface 124 of the fan housing 12 slants towards a central axis O of the fan housing 12 from top to bottom. Put another way, the inner surface 124 of the fan housing 12 expands slightly in an upward direction away from the central axis O of the fan housing 12, with an inner space 126 surrounded by the inner surface 124 correspondingly expanding slightly in the upward direction. Accordingly, the air inlet 121 at the top of the fan housing 1...

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PUM

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Abstract

A cooling fan includes a fan housing and a rotor. The fan housing includes an inner surface defining an inner space therein. The inner surface expands along a direction parallel to a central axis of the fan housing. The rotor is received in the inner space and surrounded by the inner surface of the fan housing. The rotor includes a hub and a plurality of rotary blades extending outwardly from the hub. Each of the rotary blades has an outer edge confronting the inner surface of the fan housing. The outer edge of each rotary blade slants towards the central axis of the fan housing.

Description

BACKGROUND[0001]1. Technical Field[0002]The present disclosure relates generally to cooling fans, and more particularly to an axial fan with a fan housing which can be easily fabricated.[0003]2. Description of Related Art[0004]Cooling fans are commonly used in combination with heat sinks for cooling electronic components, such as CPUs. Normally, the heat sink is arranged on the electronic component to absorb heat therefrom, while the cooling fan is arranged on the heat sink to produce forced airflow flowing through the heat sink to take away the heat.[0005]Generally, the cooling fan includes a stator, a rotor rotatably supported by the stator, and a fan housing surrounding the rotor for guiding the forced airflow through the heat sink. The fan housing usually has a rectangular or annular profile. An inner surface of the fan housing facing the rotor is cylindrical, to avoid interference of the rotor and the fan housing during rotation of the rotor. The fan housing is usually made of ...

Claims

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Application Information

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IPC IPC(8): F04D29/52
CPCF04D29/545F04D29/164
InventorSUO, XUE-LIANYEH, DUNG-CHANG
OwnerFU ZHUN PRECISION IND SHENZHEN