Semipermanent Life and Low Acoustic Noise Air Moving Device with Laminar Flow
Original Publication Date: 1997-Feb-01
Included in the Prior Art Database: 2005-Apr-01
Kohno, Y: AUTHOR [+3]
Disclosed is an Air Moving Device (AMD) for cooling a heat dissipation device/system.
Semipermanent Life and Low Acoustic Noise Air Moving
an Air Moving Device (AMD) for cooling a heat
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
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.
"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...