Patent ID: 9573147
Date: 2017-02-21
CPC Classifications: A61M,B05B

Claim:
1. A nozzle for generating from a fluid and a gas an aerosol comprising fluid particles, the nozzle comprising: an aerosol exit orifice extending to an outer nozzle surface, wherein the aerosol exit orifice has an aerosol exit orifice diameter between 400 μm and 1.2 mm, a central axis and has a circumferential edge from which an aerosol exit channel extends from the outer nozzle surface toward an aerosolizing space within the nozzle; a fluid exit orifice that is aligned on the same central axis as the aerosol exit orifice and opens into the aerosolizing space within the nozzle at a distance between the fluid exit orifice and an entrance to the aerosol exit channel, the aerosol exit orifice diameter being at least 1.3 times larger than the fluid exit orifice diameter; and a converging annular pressurized gas channel extending at an acute gas flow angle with respect to the central axis and having a pressurized gas exit in close proximity to the fluid exit orifice so as to intersect with fluid exiting from the fluid exit orifice, wherein the converging annular pressurized gas channel comprises a first partial annular channel extending between an annular neck and the fluid exit orifice at the average acute gas flow angle of 10-30° with respect to the central axis; the first partial annular channel has inner and outer walls formed by a conical wall and an inner front insert wall along which the pressurized gas flows with the acute gas flow angle being determined by a conical wall angle and a front insert wall angle with respect to the central axis in an area of the fluid exit orifice, the inner front insert wall and the conical wall being hydrophobic, omniphobic or lyophobic; the first partial annular channel diverges at an acute divergence angle between 1 and 30°, the acute divergence angle being the difference between the conical wall angle and the front insert wall angle; and a fluid supply channel is provided within a cone-shaped fluid supply nozzle insert forming the conical wall that is the inner wall of the first partial annular channel, designed as a converging circumferential compressed gas channel that is axially centered in a cone-shaped hollow space of the front insert forming the inner front insert wall that is the outer wall of the first partial annular channel.