Patent ID: 8028934

Claim:
A two-substance atomizing nozzle for spraying a liquid with the aid of a compressed gas, said nozzle having a longitudinal axis and comprising: a mixing chamber; a liquid inlet in communication with a source of liquid and opening into said mixing chamber; a gas inlet in communication with a source of compressed gas, said gas inlet opening into said mixing chamber such that pressurized gas flows from said gas inlet and into said mixing chamber and mixes with liquid in said mixing chamber; an outlet adjoining said mixing chamber and being disposed downstream of said mixing chamber in a liquid supply direction, said outlet including a first outlet part which converges inwardly towards the axis as said first outlet part extends in the liquid supply direction and a second outlet part disposed downstream of said first outlet part in the liquid supply direction, said second outlet part diverging outwardly away from the axis as said second outlet part extends in the liquid supply direction, said second outlet part terminating at an outlet opening disposed downstream of said mixing chamber in the liquid supply direction, said outlet being disposed to guide a stream of liquid mixed with compressed gas from said mixing chamber to said outlet opening; and an annular gap surrounding said outlet opening and in communication with a source of compressed gas, said annular gap being disposed and configured to discharge pressurized gas at a high speed adjacent said outlet opening to draw out a liquid film located on an inner wall of said second outlet part into thin liquid lamellas which break into small drops.