Centrifugal fan

A technology of centrifugal fans and fan blades, which is applied to non-variable pumps, non-volume pumps, components of pumping devices for elastic fluids, etc., can solve annoying narrow-band noise and other problems, and reduce narrow-band noise. noise effect

Inactive Publication Date: 2007-11-21
QUANTA COMPUTER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As shown in Figure 1, the vertical connection between the bracket 104 and the bearing seat 106 and the volute casing 102 will cause the high-speed traction airflow 100 to hit the bracket 104, thereby generating annoying narrow-frequency noise

Method used

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Examples

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Embodiment Construction

[0024] As mentioned above, the present invention provides a centrifugal fan, the outline of the bracket on the volute casing is formed by the involute obtained by taking the motor bearing base as the base circle. The blades of the fan adopt a backswept design, and the blades are vertically intersected with the outline of the bracket, so that the impact of the traction airflow caused by the blade rotation and the bracket is reduced, thereby reducing the narrow-frequency noise caused by it. The structure of the centrifugal fan will be described in detail below in conjunction with preferred embodiments.

[0025] Please refer to FIG. 2 , which shows a frame structure diagram of a centrifugal fan according to a preferred embodiment of the present invention. The volute casing 202 of the centrifugal fan 200 includes a driving device 212 (such as a motor) and a fan blade 108 . The driving device 212 is fixed on the back side of the bearing seat 106 in the figure (indicated by a dotte...

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PUM

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Abstract

The invention discloses a centrifugal fan with a volute casing, including a drive install and vanes. There is a circle loading plate mounting on the volute casing by 2 supports at least. Drive installs are mounting on the loading plate. The outline of supports is an involute line. Fans and outline of supports are vertical overlap, which can make the collision of gas leaded in from the space of supports and the outline to the lowest level, then reduces narrow-band noise.

Description

technical field [0001] The invention relates to a centrifugal fan, in particular to a centrifugal fan with noise reduction function. Background technique [0002] As the computer responds to the market demand for thinner computers, it is no longer possible to reserve enough natural convection space inside the notebook computer casing for the space required by the heat dissipation design. Especially high-frequency components (such as central processing units and graphics chips) have faced considerable bottlenecks in the implementation of thermal design. Therefore, using a centrifugal fan to generate forced convection heat dissipation has become the main structure of the notebook computer heat dissipation mechanism. [0003] In the design of the fan, the characteristics of high static pressure and high speed generated by the volute casing of the centrifugal fan are used to overcome the problem of the narrow air convection in the notebook computer system. However, the charact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66F04D17/08F04D29/30
Inventor 曾俊发黄玉年
Owner QUANTA COMPUTER INC
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