The sprayer has a cleaning nozzle (22) used for cleaning process, which is provided in the inner region of liquid tank (1) and is supplied with liquid within defined time intervals in such a way that the cleaning liquid amount fed to liquid tank during the cleaning process is less than the cleaning liquid amount expelled through the exhaust duct during the cleaning process. The pressure is fed to cleaning nozzles at defined time intervals in a pulsed manner through the metering device for maintaining the necessary equipment for the cleaning process.
