SPRAY NOZZLE

PROBLEM TO BE SOLVED: To provide a spray nozzle capable of uniformly micronizing a droplet diameter at a low pressure and spraying the liquid drop conically at a wide angle without complicating the structure. SOLUTION: The spray nozzle is provided with a liquid jetting nozzle 1 provided with a slit like jetting port 3 at the tip part. a nozzle main body 7 housing the liquid jetting nozzle coaxially and having a cruciform slit like discharge port 9 at the tip part, a circular gas passage 13 formed between a liquid jetting nozzle and the nozzle main body and a mixing zone 14 formed in the downstream region of the jetting port. The slit like discharge port 3 is oriented in a substantially the same phase to the slit like opening part of one of the cruciform slit like discharge port 9. In the nozzle, when a gas is mixed with a liquid to have a volume ratio gas/liquid of ≥150 under ≤0.1 MPa gas pressure, the mixed mist is sprayed conically or radially at 20-60° jetting angle. COPYRIGHT: (C)2004,JPO&NCIPI