| 摘要 |
PROBLEM TO BE SOLVED: To provide a rapid-cooling washing nozzle and a washing method, by which dirt is removed with a small amount of water.SOLUTION: There are provided a rapid-cooling washing nozzle and a washing method for blowing away dirt, in which an artificial Laval nozzle 1 is utilized, whose inner diameter is tapered and extends toward an exit b; a compressed air flow, a steam flow, or a mixed airflow A of compressed air and steam is fed into the nozzle 1; vapor flow is decompressed at the exit and temperature of the airflow is reduced by adiabatic expansion at this time to generate supersaturated steam that blows out and instantly turns into minute water droplets when applied at high speed to a dirty object to be washed; and the water droplets and oil are mixed into an emulsion state by condensation force caused at that moment. |
