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Cooling fan

a cooling fan and fan body technology, applied in the direction of machines/engines, stators, liquid fuel engines, etc., can solve problems such as noise and other problems

Inactive Publication Date: 2009-04-23
FU ZHUN PRECISION IND SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is becoming a critical challenge on how to remove the heat so that the system can run reliably.
However, an air outflow in a curved tongue portion 16 of the frame 10 will interfere with the intake airflow of the air inlets 12, 14 and the later air outflow due to adverse airflow, creating many problems such as noise.

Method used

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Examples

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Embodiment Construction

[0014]Referring to FIGS. 1-2, a cooling fan of a preferred embodiment of the invention comprises a frame 100, and an impeller 200 disposed in the frame 100. The impeller 200 comprises a hub 220 and a plurality of blades 240 mounted on the hub 220.

[0015]The frame 100 comprises a cap 120, a base 140, and a sidewall 160 perpendicularly and upwardly extending from a periphery of the base 140. The cap 120 is mounted on the sidewall 160 with a chamber formed between the cap 120, the base 140 and the sidewall 160. The impeller 200 is disposed in the chamber to blow an outward airflow out of the chamber from an air outlet 180, which is defined in a front of the sidewall 160. A curved tongue portion 190 protrudes inwardly from the sidewall 160, and is adjacent to the air outlet 180 to adjust an intake airflow flowing into the frame 100.

[0016]The cap 120 and the base 140 respectively define a first air inlet 122 and a second air inlet 142 therein. The air enters into the chamber via the first...

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PUM

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Abstract

A cooling fan includes a frame (100) and an impeller (200) having a plurality of blades (240) disposed in the frame (100). The frame (100) has a cap (120) with an air inlet (122), a base (140) and a sidewall (160) extending from a periphery of the base (140) with an air outlet (180) defined therein. The cap (120) is mounted on the sidewall (160) with a chamber formed between the cap (120), the base (140) and the sidewall (160). A curved tongue portion (190) is formed on the sidewall (160) in vicinity of the air outlet (180). A protrusion (124) is formed on the cap (120) in vicinity of the curved tongue portion (190) and protrudes into the air inlet (122).

Description

CROSS REFERENCE[0001]Relevant subject matter is disclosed in a pending U.S. patent application Ser. No. ______, filed on ______, and entitled “COOLING FAN”, which is invented by the same inventors and assigned to the same assignee as this application and which is hereby fully incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates generally to a cooling fan, and more particularly to a cooling fan having low noise.[0004]2. Description of Related Art[0005]The computer CPU speed has been greatly increased in recent years due to a rapid progress in semi-conductor technologies. The chip surface heat flux is thus higher and higher accordingly. It is becoming a critical challenge on how to remove the heat so that the system can run reliably. The compact space with high flow resistance in a notebook computer environment is even more critical in the heat removal. A fan with higher air pressure is frequently chosen under such a c...

Claims

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Application Information

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IPC IPC(8): F01D1/02
CPCF04D29/4213F04D25/0613
Inventor HWANG, CHING-BAIZHAO, ZHI-HUIZHANG, WEN-JIE
Owner FU ZHUN PRECISION IND SHENZHEN