Spray device using injector or ejector principle using spray gun with Laval spray jet for providing high energy spray beam containing spray medium mixed with pressurized air

摘要

The spray device has a spray gun (1) with a mixing chamber (1.1) for pressurized air and the spray medium, supplied via respective lines (10,11), a pressurized air valve, a blocking valve (13) and a Laval spray jet (5). The pressurized air is pulsed via an air quenching valve (9.5) having a pressurized air control channel coupled to a release device (9), with a Laval air jet (6) infront of the mixing chamber, having a diffusor (6.2) projecting into the confusor (5.1) of the spray jet, the front wall of the mixing chamber shaped in accordance with the spray flow line.