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Centrifugal blower having auxiliary radial inlet

a centrifugal blower and auxiliary radial technology, which is applied in the direction of machines/engines, stators, liquid fuel engines, etc., can solve the problems of limited air sucked and failure to provide the expected heat dissipation effect, so as to improve the smoothness of air inlet and reduce the noise of air suction

Inactive Publication Date: 2006-02-02
SUNONWEALTH ELECTRIC MACHINE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] Another object of the present invention is to provide a centrifugal blower with improved air inlet smoothness.

Problems solved by technology

However, in use, a limited amount of air is sucked by the impeller 3 from top of the cover 2.
However, the airflow may enter and leave the housing via the radial air inlet at the same time, resulting in turbulence and thus failing to provide the expected heat-dissipating effect.

Method used

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  • Centrifugal blower having auxiliary radial inlet
  • Centrifugal blower having auxiliary radial inlet
  • Centrifugal blower having auxiliary radial inlet

Examples

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first embodiment

[0025] Referring to FIGS. 2 and 3, a centrifugal blower in accordance with the present invention comprises a housing 1, a cover 2, and an impeller 3. The housing 1 includes a peripheral wall 12 defining an inner space 10 in which the impeller 3 is rotatably mounted. The peripheral wall 12 further includes a radial air outlet 11 communicated with the inner space 10 and an auxiliary radial air inlet 13 that is also communicated with the inner space 10. An eccentric axle tube 101 is mounted in the inner space 10, and the impeller 3 is rotatably mounted on the eccentric axle tube 10.

[0026] The radial air outlet 11 is located at a side of the inner space 10. The peripheral wall 12 is substantially a snail shell-like structure surrounding the inner space 10. The auxiliary radial air inlet 13 may be circular or square in section. Preferably, the auxiliary radial air inlet 13 is in the form of a rectilinear slit located adjacent to the radial air outlet 11. A sectional area of the auxiliary...

second embodiment

[0030]FIG. 4 illustrates the centrifugal blower in accordance with the present invention. In this embodiment, a plurality of auxiliary radial air inlets 13′ are defined in the peripheral wall 12 adjacent to the first sidewall 15 delimiting the radial air outlet 11. Each auxiliary radial air inlet 13′ is inclined. Preferably, the auxiliary radial air inlets 13′ are equispaced and substantially parallel to one another. By this arrangement, the more radial auxiliary airflows can be sucked into the inner space 10 via the auxiliary radial air inlets 13′. All of the overall air inlet amount, the wind pressure, and the overall air outlet amount are increased.

[0031]FIGS. 5 and 6 illustrate a third embodiment of the centrifugal blower in accordance with the present invention. In this embodiment, a plurality of auxiliary radial air inlets 13″ are defined in the peripheral wall 12 adjacent to the first sidewall 15 delimiting the radial air outlet 11. Further, each of two sidewalls 131 and 132 ...

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Abstract

A centrifugal blower includes a housing, a cover, and an impeller. The housing includes a peripheral wall delimiting an inner space. The peripheral wall further includes a first sidewall and a second sidewall respectively at two ends thereof. A radial air outlet is defined between the first sidewall and the second sidewall of the peripheral wall. A cover includes an axial air inlet communicated with the inner space of the housing. An impeller is rotatably mounted in the inner space of the housing and aligned with the axial air inlet. At least one auxiliary radial air inlet is defined in the peripheral wall and adjacent to one of the first sidewall and the second sidewall. When the impeller turns, an axial airflow is sucked into the inner space via the axial air inlet and an auxiliary radial airflow is sucked into the inner space via the auxiliary radial air inlet.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a centrifugal blower. In particular, the present invention relates to a centrifugal blower having at least one auxiliary radial inlet for increasing the air inlet amount. [0003] 2. Description of Related Art [0004]FIG. 1 illustrates a conventional centrifugal blower (or heat dissipating fan) comprising a housing 1, a cover 2, and an impeller 3. The housing 1 includes a radial air outlet 11 and the cover 2 includes an axial air inlet 21. The impeller 3 is rotatably mounted in the housing 1. When the impeller 3 turns, axial airflow is sucked into the housing 1 via the axial air inlet 21. The direction of the axial airflow is changed and the airflow is outputted via the radial air outlet 11 for dissipating heat of an object. However, in use, a limited amount of air is sucked by the impeller 3 from top of the cover 2. The air surrounding a periphery of the housing 1 is not utilized. The ...

Claims

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Application Information

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IPC IPC(8): F01D1/02
CPCF04D29/4226F04D29/681F04D29/424F04D17/04F04D29/684
Inventor HORNG, ALEXLU, YU-YUANFANG, MEI-CHIH
Owner SUNONWEALTH ELECTRIC MACHINE IND