Patent ID: 6110244
Filing Date: 2000-08-29
Classification: A61G,F24F,Y10S

Abstract:
A clean air system for producing a clean air space within a boundary between the clean air space and a surrounding contaminated air space, the system comprising:(a) a clean air means for producing a flow of clean air;(b) an outlet through which said clean air is discharged to a clean area forming a clean air space, the outlet having a periphery defining the boundary between the clean air space and the surrounding air space; and(c) a Coanda effect device, located adjacent the clean air means substantially along the entire said boundary, for inducing movement of air away from the flow of clean air past the Coanda effect device to such contaminated air space, wherein the Coanda effect device comprises a plenum chamber attached to the exterior of said clean air means and which houses a profiled convex surface spaced apart from the exterior of said clean air means by a gap through which a jet of air is blown by application of air pressure to said plenum chamber.