Patent ID: 7648081

Claim:
A cleaning and releasing device for spraying a jet flow onto an object to be cleaned, comprising: an injection nozzle which mixes a pressurized liquid and a pressurized gas in said injection nozzle and injects the pressurized liquid and the pressurized gas; a pressurized liquid flow passage for supplying the pressurized liquid to said injection nozzle; a pressurized gas flow passage for supplying the pressurized gas to said injection nozzle; operating means for supplying and stopping the pressurized liquid to said injection nozzle, said operating means being provided in said injection nozzle or on the flow passage of the pressurized liquid in communication with said injection nozzle; detecting means for detecting supply and stop of the pressurized liquid generated by an operation of said operating means, said detecting means being provided in a position on said pressurized liquid flow passage; a switching valve provided in the flow passage of the pressurized gas and serving to supply and stop the pressurized gas to said injection nozzle; and a controller for controlling a switching operation of said switching valve based on a detection signal transmitted from the detecting means; wherein the controller opens said switching valve based on a detection signal transmitted from the detecting means so as to supply the pressurized gas to said injection nozzle when the injection of the pressurized liquid from said injection nozzle is detected by said detecting means; and wherein the controller closes said switching valve based on a detection signal transmitted from the detecting means so as to stop the supply of the pressurized gas to said injection nozzle when the stop of the injection of the pressurized liquid from said injection nozzle is detected by said detecting means.