# US 5,348,563 A · Air purifying apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,348,563 A - Document ID: US5348563A - Status: Granted - Kind: A - Application number: 08/082,941 - Filed: 1993-06-29 - Granted: 1994-09-20 - Earliest claimed: 1993-06-29 - Assignees: Honeywell Inc. - Inventors: George B. Davis - Web page: https://patentgrep.com/patent/US5348563A ## CPC - F24F 8/80: Self-contained air purifiers - F24F 8/10: by separation, e.g. by filtering - F24F 8/108: using dry filter elements - F24F 2221/14: mounted on the ceiling - Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE ## Abstract A ceiling mounted air purifier that provides a high velocity, multi-directional air exhaust pattern that distributes filtered air to all areas of a room which includes a plurality of filters and centrifugal fans. The centrifugal fans are substantially surrounded by baffles which form generally equally spaced exhaust outlets. ## Claims ### Claim 1 An air purifier apparatus providing a multi-directional air exhaust pattern so as to circulate and filter the air within a room, comprising: a base defining a plenum region and having a plurality of air inlet openings; a plurality of fan means for drawing air into said apparatus being located within said plenum region adjacent said air inlet openings; motor means for driving said fan means; relaying means for relaying electrical power to said motor means; baffles substantially surrounding each said fan means and defining an air channel therebetween including an air exhaust outlet, said air exhaust outlets being substantially equally spaced with respect to each other; a housing releasably secured to said base and having air intake openings; a plurality of filtering means for filtering the room air being mounted within said housing and exterior to said plenum region; means for sealing said filter means in surrounding relationship to said air inlet openings; wherein air being drawn through said air intake openings and said filtering means by said fan means is exhausted to the room through said air exhaust outlets. ### Claim 2 (depends on 1) The air purifier apparatus of claim 1, wherein said air exhaust outlets are substantially perpendicularly oriented with respect to each other. ### Claim 3 (depends on 1) The air purifier apparatus of claim 1, including a plurality of bracket means mounted to said base and extending outwardly therefrom, and means for securing said housing to said bracket means. ### Claim 4 (depends on 1) The air purifier apparatus of claim 1, wherein each of said filter means includes an HEPA filter element. ### Claim 5 (depends on 4) The air purifier apparatus of claim 4, wherein each of said filter means further includes a prefilter, each of said prefilters being positioned in a surrounding relationship to said HEPA filter elements. ### Claim 6 (depends on 1) The air purifier apparatus of claim 1, wherein said motor means including a plurality of motors, said motors being drivingly connected to each of said fan means. ### Claim 7 (depends on 1) The air purifier apparatus of claim 1, wherein said relaying means includes first and second electrical power inputs mounted to said base, said first electrical power input and said second electrical power input being electrically connected to said motor means. ### Claim 8 (depends on 1) The air purifier apparatus of claim 1, wherein said baffles include a first end adjacent said fan means and a second end adjacent said air exhaust outlets, said air channel progressively increasing in size between said first end and said second end of said baffles. ### Claim 9 (depends on 8) The air cleaner apparatus of claim 8, wherein said base includes upper and lower plates, said air inlet openings being through said lower plate, and said baffles extending between said upper and lower plates. ### Claim 10 (depends on 9) The air purifier apparatus of claim 9, wherein said baffles are arcuately shaped. ### Claim 11 An air purifier apparatus providing a multi-directional air exhaust pattern so as to circulate and filter the air within a room, comprising: a base defining a plenum region and having a plurality of air inlet openings; a plurality of centrifugal fan means for drawing air into said apparatus being located within said plenum region and aligned with said air inlet openings; a separate motor means drivingly connected to each of said fan means; means for supplying electrical power to each of said motor means; arcuate baffles substantially surrounding said centrifugal fan means and defining an air channel therebetween including an air exhaust outlet, said air exhaust outlets being substantially equally spaced with respect to each other; a housing means for releasably securing said housing to said base, a plurality of air intake openings into said housing; a plurality of filters mounted within said housing and spaced with respect o one another exterior to said plenum region; and means for sealing said filters in surrounding relationship to said air inlet openings; wherein air is drawn through said air intake openings and said filters by said centrifugal fan means and exhausted to the room through said air exhaust outlets. ### Claim 12 (depends on 11) The air purifier apparatus of claim 11, further comprising prefilters positioned in a surrounding relationship to said filters. ### Claim 13 (depends on 11) The air purifier apparatus of claim 11, wherein said filters are HEPA filters. ### Claim 14 (depends on 13) The air purifier apparatus of claim 13, wherein said filters are generally cylindrical in configuration, and said motors being disposed within said filters. ### Claim 15 (depends on 11) The air purifier apparatus of claim 11, wherein said baffles include a first end adjacent said centrifugal fans and a second end adjacent said exhaust outlets, said baffles being arcuately shaped so that said air channels progressively increase in size from said first end to said second end of said baffles.