Method and device for diffusing a protective flux with...

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

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F24F 3/16 (2006.01) F24F 9/00 (2006.01) F24F 13/06 (2006.01)

Patent

CA 2447086

The invention relates to a device and method for diffusing a protective flux. In order to protect one area (2) of a service station, a more or less parallel air flow (9) is created in the direction of said area. Above a threshold F, the air flow has a gradually increasing speed V22 and, below said threshold, the air flow speed V21 is more or less uniform along the length of a flow section in a plane P which is transverse to the direction of flow D.According to the invention, one possible configuration for an air flow (9) diffusion device (1), which allows a confinement barrier to be created, consists of a diffusing wall (4) comprising a main wall (11) and a lateral wall (12). The main planar wall is adapted to diffuse a main laminar flow (91) in the sterile area (2) to be protected. The lateral wall (12) is adapted to diffuse a lateral flow (92) divergent from the main flow. A skirt (6) is disposed to create an obstacle to the lateral flow and to accelerate said flow by means of deflection. The inventive diffusion device can be used to isolate and maintain a sterile area (2), e.g. in the agri-food and pharmaceutical industries.

Pour protéger une zone (2) d'un poste d'intervention on établit en direction de cette zone un flux d'air (9) sensiblement parallèle ayant au-delà d'une frontière (F) une vitesse (V22) progressivement accrue, et en deçà de ladite frontière une vitesse (V21) qui est sensiblement uniforme le long d'une section de flux dans un plan (P) transversal à la direction d'écoulement (D). Une configuration possible d'un dispositif de diffusion (1) d'un flux d'air (9) selon ce procédé, qui permet de créer une barrière de confinement, comprend une paroi de diffusion (4) constituée d'une paroi principale (11) et d'une paroi latérale (12). La paroi principale, plane, est adaptée pour diffuser un flux principal (91) laminaire dans la zone stérile (2) à protéger. La paroi latérale (12) est adaptée pour diffuser un flux latéral (92), divergent du flux principal. Une jupe (6) est disposée pour faire obstacle au flux latéral, et l'accélérer en le défléchissant. Ce dispositif de diffusion peut servir à isoler et maintenir, une zone (2) stérile, par exemple dans l'industrie agro-alimentaire et l'industrie pharmaceutique.

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