Personal air filtering and delivery systems

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 39/14 (2006.01) A62B 7/10 (2006.01) B01D 46/10 (2006.01) B01D 46/42 (2006.01) B03C 3/30 (2006.01) F24F 3/16 (2006.01)

Patent

CA 2259128

An air filter unit includes an air filter made up of two layers of submicron filter media (32, 34) such as HEPA or ULPA filter media, with a layer of electrostatic filter media (33) sandwiched therebetween. Preferably, a layer of electrostatic filter media (31) is also provided on the upstream side of the submicron filter media (32). A personal delivery system for filtered air includes air delivery tubes (66) supported in relation to a user's nose to position end air supply openings (67) adjacent opposite sides of the user's nose and mouth. Filtered air from the air supply tubes create a curtain or area of filtered air around the user's nose and mouth so the user breathes filtered rather than ambient air. An area delivery system includes a canopy (87) over the area with filtered air supplied to the inside of the canopy.

La présente invention vise un filtre à air composé de deux couches de médium filtrant submicronique (32, 34), tels que les médiums filtrants HEPA et ULPA, séparées l'une de l'autre par une couche intercalaire de médium filtrant électrostatique (33). De préférence, une couche de médium filtrant électrostatique (31) est également présente du côté amont du médium filtrant submicronique (32). Un système individuel d'alimentation en air filtré se compose de tubulures de distribution d'air (66) montées à proximité du nez de l'utilisateur de sorte que les orifices de sortie de l'air (67) se trouvent de chaque côté du nez et de la bouche. L'air filtré provenant des tubulures de distribution forme un rideau ou une zone d'air filtré autour du nez et de la bouche de sorte que l'utilisateur respire l'air filtré plutôt que l'air ambiant. Le système de distribution de l'air comporte aussi une palette (87) surplombant la zone d'air filtré, lequel est projeté sous cette palette.

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