Microcapillary nebulizer and method

B - Operations – Transporting – 05 – B

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299/14

B05B 1/00 (2006.01) B05B 7/04 (2006.01) F23D 11/10 (2006.01)

Patent

CA 1097390

G201-A MICROCAPILLARY NEBULIZER AND METHOD Abstract of the Disclosure A pneumatic microcapillary nebulizer adapted to accept a supply of flowable liquid, such as water, and reduce the liquid to an ultrafine dispersion of particles in a propellant gas, such as air. The microcapillary nebulizer comprises a mixing element having a liquid conduit comprising a microporous capil- lary element having a multiplicity of liquid passages and exit orifices, a gas conduit having a gas orifice and a filming- surface having an edge comprising said gas orifice and communi- cating with said liquid exit orifices. All the liquid flowing to said filming surface must pass through said capillary element wherein it is retained in the absence of external forces and whereby it may be rendered substantially free of undesirable solid impurities of microscopic size or larger. The filming sur- face has an affinity for the liquid, which affinity coupled with the cohesive forces acting on the liquid and the pressure acting on the liquid, cause the liquid to flow out of the capillary ele- ment and across the filming surface to form a continuous thin liquid film on the filming surface which is drawn to the edge of the filming surface comprising the gas orifice and is reduced to an ultrafine dispersion of said liquid in the gas flowing through said gas conduit.

301459

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