Browse Prior Art Database

Ultra Reliable Fan

IP.com Disclosure Number: IPCOM000119206D
Original Publication Date: 1996-Mar-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Miller, WC: AUTHOR [+3]

Abstract

A cooling device for an electronic module includes a pair of collapsible bladed members, or fans, attached to a pair of motors. If one of the pair fails, the other may be actuated thus, extending the life of the cooling device and allowing for scheduling of maintenance.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 86% of the total text.

Ultra Reliable Fan

      A cooling device for an electronic module includes a pair of
collapsible bladed members, or fans, attached to a pair of motors.
If one of the pair fails, the other may be actuated thus, extending
the life of the cooling device and allowing for scheduling of
maintenance.

      Referring to the Figure, two fan assemblies 10 and 12 are
shown.  Each assembly 10, 12 includes collapsible bladed members 14,
16 attached to rotary motors 20, 22, respectively, and are mounted
within housings 26, 28 which, in turn, may be secured together by
fasteners (not shown) at 30..  Bladed members 14, 16 are attached to
their respective motors 20, 22 by a spring and hinge structure (not
shown), such that when not rotating the bladed members are retracted
into the position of blades 14 so as not to impede the airflow along
path 24, and such that when rotating the bladed members are brought
by centrifugal force to the open, operable position.  When not
powered, bladed members 14, for example, will be kept shut, or
collapsed, by the force of airflow from the powered unit 12, and from
the fact that unit 10 is not powered.

      A sensing device, such as Hall effect sensors, may be used to
determine that the operating fan has failed, and switch power to the
other fan thus, extending the life of the cooling system and allowing
a signal to be generated for alerting maintenance personnel to
replace the defective unit 10 or 12.  Alternatively, both fans may be
o...