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Centrifugal fan

a centrifugal fan and fan body technology, applied in the field of centrifugal fans, can solve the problems of increasing the noise generated by centrifugal fans, increasing the heat generated by electrical components, and increasing the normal increase of the noise generated by the centrifugal fan

Inactive Publication Date: 2011-06-23
FU ZHUN PRECISION IND SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such electronic components generate increased levels of heat, which must be dissipated promptly.
However, such an increase normally also increases noise generated by the centrifugal fan.

Method used

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  • Centrifugal fan
  • Centrifugal fan
  • Centrifugal fan

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0011]Referring to FIGS. 1 and 2, a centrifugal fan is shown. The centrifugal fan 100 includes a hollow housing 10, and a first impeller 20 and a second impeller 30 each rotatably mounted in the housing 10.

[0012]The housing 10 includes an air collecting portion 40, and a first frame 50 and a second frame 60 both connected at a rear of the air collecting portion 40. The first frame 50 and the second frame 60 are symmetrically disposed at two lateral sides of the rear of the air collecting portion 40. An air outlet 41 is defined in the front of the air collecting portion 40.

[0013]The air collecting portion 40 includes a bottom plate 42, a top plate 43 and two guide plates 44 connected between the bottom plate 42 and the top plate 43. The bottom plate 42 faces the top plate 43. The two guide plates 44 are located at two opposite lateral sides of the bottom plate 42, and are parallel to each other. A cross section of the air collecting portion 40, taken in a vertical plane, is rectangul...

second embodiment

[0021]FIGS. 3 and 4 show a centrifugal fan 100a. The centrifugal fan 100a differs from the centrifugal fan 100 of the previous embodiment only in that a first frame 50a and the second frame 60 are arranged at two opposite sides of a rear of the air collecting portion 40a in an asymmetrical manner. That is, the first frame 50a is closer to the air outlet 41 of the air collecting portion 40a than the second frame 60. The first impeller 20 is closer to the air outlet 41 of an air collecting portion 40a than the second impeller 30, and a guide plate 44a of the air collecting portion 40a which connects with the side plate 73 of the first frame 50a is shorter than the guide plate 44 of the air collecting portion 40a which connects with the side plate 73 of the second frame 60. In operation of the centrifugal fan 100a, an average angle of airflow out of a first vent hole 52a of the first frame 50a is different from that of the airflow out of the second vent hole 62 of the second frame 60, ...

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PUM

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Abstract

A centrifugal fan includes a housing including an air collecting portion, a first frame and a second frame. The air collecting portion has an air outlet defined in one end thereof. The first and second frames are located at two opposite sides of an opposite end of the air collecting portion. The first and second frames each define a receiving space therein for rotatably receiving an impeller. The first and second frames each further define a vent hole therein. The receiving spaces of the first and second frames communicate with the inner space of the air collecting portion via the vent holes thereof. Airflow generated by the two impellers travels to the inner space of the air collecting portion through the vent holes of the first and second frames, and exits the centrifugal fan through the air outlet of the air collecting portion.

Description

BACKGROUND[0001]1. Technical Field[0002]The present disclosure generally relates to heat dissipation, and particularly to a centrifugal fan for dissipating heat from electronic components.[0003]2. Description of Related Art[0004]With developments in technology, improved performance of electronic components such as CPUs (central processing units) has been achieved. However, such electronic components generate increased levels of heat, which must be dissipated promptly. Conventionally, a centrifugal fan is used to remove the generated heat of the electronic components.[0005]The centrifugal fan includes a housing and an impeller rotatably mounted in the housing. The housing defines an air outlet and an air inlet perpendicular to the air outlet. In operation, air outside the housing of the centrifugal fan is pumped into the housing via the air inlet thereof and then expelled out of the housing by the impeller from the air outlet to take away the generated heat of the electronic componen...

Claims

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Application Information

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IPC IPC(8): F04D1/00
CPCF04D25/166G06F1/20F04D29/424
Inventor ZHA, XIN-XIANGYU, YE-FEIKUO, JER-HAUR
Owner FU ZHUN PRECISION IND SHENZHEN