Browse Prior Art Database

Method for a fan to resist high backpressure

IP.com Disclosure Number: IPCOM000009286D
Publication Date: 2002-Aug-14
Document File: 4 page(s) / 44K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for a fan to resist high backpressure. Benefits include improved performance and improved reliability.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 67% of the total text.

Method for a fan to resist high backpressure

Disclosed is a method for a fan to resist high backpressure. Benefits include improved performance and improved reliability.

Background

        � � � � � Conventional fan designs have a gap between the fan blade tip and the external frame (see Figure 1). The gap could enable the air to backflow, especially where high backpressure exists (see Figure 2). The gap could reduce the fan’s capability, resulting in lower airflow. The conventional solution to this problem is to increase the revolutions per minute (RPMs) so that the airflow loss through the gap between the fan blade tip and the fan frame can be offset by the higher airflow rate through the fan blade area.

General description

        � � � � � The disclosed method is a fan design that can resist higher backpressure. The frame design reduces the typical gap between the fan blade tip and the frame. This method increases the path for the back-flow air so that the backflow can be minimized.

        � � � � � The key element is a frame for the fan blade and a matching external frame.

Advantages�

� � � � � The disclosed method provides advantages, including:

·        Improved fan capability to resist high backpressure

·        Improved fan blade area so that a higher airflow rate is delivered

·        Improved reliability due to the blade supporting structure so that blade breakage is significantly reduced

Detailed description

        � � � � � The disclosed method includes a frame that is added to the fan blade (see Figure 3)....