Electrostatic spraying installation for spraying pulverulent or liquid coating material, has sensor detecting value representing atomization air pressure downstream of valve and delivering signal to control supply to cascade of spray gun

摘要

The installation has a hand sprayer or spray gun (2) including a high voltage cascade (101) for generating a high voltage direct current for an electrostatic charge of a coating material. A valve (113) of the spray gun controls a flow of atomization air inside the spray gun in the direction of a spray head (24). A pressure sensor (200) detects a value representing the atomization air pressure downstream of the valve and delivers a signal for controlling a power supply to the cascade. An independent claim is also included for a method of controlling a power supply to a high voltage unit that is utilized for an electrostatic sprayer of a coating product and generates a high voltage direct current for the electrostatic charge of the product.