A method and a device for ventilation and airborne...

F - Mech Eng,Light,Heat,Weapons – 24 – F

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F24F 7/007 (2006.01) A62B 11/00 (2006.01) B01D 46/10 (2006.01) F24F 3/02 (2006.01) F24F 3/16 (2006.01) F24F 7/06 (2006.01) F24F 13/06 (2006.01) F24F 1/02 (2006.01)

Patent

CA 2538227

The invention concerns a device (101) for airborne decontamination of a room (3) by mixing, an air delivery (19) and suction (21) flux bound by Coanda effect (C). A vertical piping (103) comprises a suction port lower end (104) and an air delivery upper end (105). An actuating means (106) circulates air (A) inside and outside. A suction nozzle (118) provides a vertical suction surface (Sa), for sucking air (A) along a suction duct (55) parallel and bonded to the floor (6) by Coanda effect (C). A blow nozzle (129) with ceiling surface effect (20) provides a front porous blowing surface (Ss). Said nozzle produces a primary air jet (19) bound to the ceiling (20) by Coanda effect (C). A decontaminating means (127) decontaminates the air (A). The active section (Sae) of the suction surface (Sa) is lower than the active surface (Sse) of the blowing surface (Ss). Thus the unwanted shunt air stream commonly associated with bound air flow ventilation systems is eliminated.

Dispositif (101) de décontamination aéroportée d'une pièce (3) par mélange, à flux de soufflage (19) et d'aspiration (21) attachés par effet Coanda (C). Un moyen de canalisation verticale (103) comporte une extrémité inférieure d'aspiration (104), et une extrémité supérieure de soufflage (105). Un moyen de mise en mouvement (106) assure le mouvement de l'air (A) à l'intérieur et à l'extérieur. Une tuyère de suçage (118) ménage une surface d'aspiration (Sa) verticale, assurant un suçage de l'air (A) selon une veine d'aspiration (55) parallèle et collée au sol (6) par effet Coanda (C). Une tuyère de soufflage (129) à effet de surface au plafond (20) ménage une surface poreuse de soufflage (Ss) frontale. Elle produit un jet primaire (19) d'air attaché au plafond (20) par effet Coanda (C). Un moyen de décontamination (127) assure la décontamination de l'air (A). La section efficace (Sae) de la surface d'aspiration (Sa) est inférieure à la section efficace (Sse) de la surface de soufflage (Ss). De cette manière on élimine le « flux d'air parasite de shunt » lié habituellement aux systèmes de ventilation à flux d'air attaché.

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