SPIT OCCURRENCE PREVENTIVE DEVICE IN LIQUID SPRAY GUN

摘要

PROBLEM TO BE SOLVED: To prevent the occurrence of spit in a liquid spray gun with a simple structure. ;SOLUTION: An ejector 9 is interposed in a flow passage halfway between a stop valve 6 and a nozzle 3, and a suction chamber 12 thereof is made to communicate with a pressure receiving surface 7a of a pressure sensor 7 to keep the pressure of a space except a flow passage from the stop valve 6 to the nozzle 3 in a spraying state lower than that of the flow passage. And the pressure of the liquid accumulated in the space except the flow passage during the spray stoppage which is the factor behind the spit occurrence is reduced, and a circulating flow by differential pressure is formed in the space except the flow passage from the stop valve 6 to the nozzle 3.;COPYRIGHT: (C)1997,JPO