Patent ID: 11946842
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 14:
15. A method of concentrating particles in an air stream, said particles comprising airborne suspended PM2.5 aerosol particles, the method comprising: applying power to at least one stage comprising at least one set of heater elements, said set or pair comprising two heater elements positioned near a periphery of an air channel enclosed by one or more channel walls extending from at least a first open end to a second open end encompassing at least a portion of the air stream; said at least one of said two heater elements positioned along opposing sides of said channel walls between said first open end and said second open end, and configured so that upon application of power, said at least one heater elements work to form a thermal gradient that forces said airborne suspended PM2.5 aerosol particles in said air stream away from said channel walls and towards an interior region of said air channel; thus forcing particles in the air stream away from the periphery and towards an interior region of the air channel with thermophoretic force generated by said thermal gradient so that said at least one stage forms a focused beam of said airborne suspended PM2.5 aerosol particles.