Dual fan hepa filtration system

Details Dual fan hepa filtration system Dual fan hepa filtration system

1993-04-14

1994-10-25

Joyce, Harold

Ventilation

Having forced recirculation

Forced recirculation alone

55473, 55502, F24F 7007

Patent

active

053584430

ABSTRACT:
A device for use with at least one workspace, to produce an umbrella of clean room air for a distance of one meter from the device and 98% fewer particles than the air in the area three meters from the device. The device has a chamber defined by an outer wall, end walls and a filter as the inner wall. The filter functions as tile sole outlet of air. A motor with an axially extending drive shaft is mounted inside said filter. The shaft has an intake fan mounted on one end to define a sealed path which is the sole air inlet to the chamber. An exhaust fan is mounted on the other end of the shaft to define a path from the sole outlet. Air is exhausted in an axial direction is then deflected from the axial direction to the radial direction onto a baffle to reduce the velocity of the air to laminar flow. The baffle includes an upper terminal lid and a plurality of annular stepped vanes that divide the axially exhausted air into turbulent air streams and converts the turbulent air streams into radial laminar flow.

REFERENCES:
patent: 3850598 (1974-11-01), Boehm
patent: 5288267 (1994-02-01), Mitchell

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