Method And A Device For Ventilation And Airborne Decontamination By Mixing Using Blow And Suction Flows Attached By The Coanda Effect
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United States of America Patent
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Issued Date -
Aug 30, 2007
app pub date -
Sep 10, 2004
filing date -
Sep 10, 2003
priority date (Note) -
Abandoned
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Abstract
A device (101) for airborne decontamination of a room (3) by mixing using a blown jet (19) and a suction flow (21) that are attached by the Coanda effect (C). Vertical trunk means (103) have a bottom suction end (104) and a top blow end (105). Drive means (106) set the air (A) into motion inside and outside the trunk means. An intake nozzle (118) provides a vertical suction surface (Sa) serving to suck in the air (A) as a suction stream (55) parallel to the floor (6) and attached thereto by the Coanda effect (C). A blow nozzle (129) using the surface effect at the ceiling (20) presents a frontal porous blow surface (Ss). It produces a primary jet (19) of air that is attached to the ceiling (20) by the Coanda effect (C). Decontamination means (127) decontaminate the air (A). The effective area (Sae) of the suction surface (Sa) is less than the effective area (Sse) of the blow surface (Ss). This serves to eliminate the 'interfering shunt air flow' that is usually associated with attached air blow ventilation systems.
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