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Focusing particle concentrator with application to ultrafine particles

United States Patent

June 11, 2013
View the Complete Patent at the US Patent & Trademark Office
Technology is presented for the high efficiency concentration of fine and ultrafine airborne particles into a small fraction of the sampled airflow by condensational enlargement, aerodynamic focusing and flow separation. A nozzle concentrator structure including an acceleration nozzle with a flow extraction structure may be coupled to a containment vessel. The containment vessel may include a water condensation growth tube to facilitate the concentration of ultrafine particles. The containment vessel may further include a separate carrier flow introduced at the center of the sampled flow, upstream of the acceleration nozzle of the nozzle concentrator to facilitate the separation of particle and vapor constituents.
Hering; Susanne (Berkeley, CA), Lewis; Gregory (Berkeley, CA), Spielman; Steven R. (Oakland, CA)
Aerosol Dynamics Inc. (Berkeley, CA)
12/ 910,705
October 22, 2010
This invention was made with government support under the following Grant Nos: U.S. Dept. of Energy Grand #DE-FG02-08ER86335 and DE-FG02-04ER86179; and National Institutes of Environmental Health Grant #ES014997. The government has certain rights in the invention.