Browse Prior Art Database

Semipermanent Life and Low Acoustic Noise Air Moving Device with Laminar Flow

IP.com Disclosure Number: IPCOM000118447D
Original Publication Date: 1997-Feb-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Kohno, Y: AUTHOR [+3]

Abstract

Disclosed is an Air Moving Device (AMD) for cooling a heat dissipation device/system.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 87% of the total text.

Semipermanent Life and Low Acoustic Noise Air Moving Device with
Laminar Flow

      Disclosed is an Air Moving Device (AMD) for cooling a heat
dissipation device/system.

      This AMD has the characteristic of a semipermanent life and low
acoustic noise with Laminar flow output with no use of the rotation
motor.  As a result, this AMD has three benefits:
  1.  No acoustic noise caused by the motor
  2.  No acoustic noise caused by the turbulence flow
  3.  Life of this AMD does not depend on the life of bearing

      The Figures show an example of this device and the
structure.  Fig. 1 is the isometric view.  Fig. 2 is the structure
section view.  In Fig. 1, this AMD (1) has symmetry area "A" and "B"
with the boundary surface "C".  These strut (2) do not rotate by the
motor but by the airflow itself.  In Fig. 2, in both area A and B,
two surfaces of air-in and air-out are connected by the
expandable/shrinkable material (3), like rubber, and this material is
expanded/shrunk.  The timing of expand/shrink is done mutually.  When
the area A is expanded,  the area B is shrunk.

      The surface "D" is covered by flap or the material which can
pass the airflow in only one direction.  The airflow, which is
obtained from the gap of two struts, makes laminar stream airflow.
On the condition that the cycle of expand/shrink is done at the
period of two  seconds and the gaps one millimeter, the airflow
obtained by this AMD is equal to or bigger than...