ELECTRONIC ACTUATOR FOR SIMULTANEOUS LIQUID FLOWRATE AND PRESSURE CONTROL OF SPRAYERS

摘要

An electric solenoid valve and electronic circuitry for actuating the val ve in such a manner as to control the liquid flow into a device, such as a s pray nozzle, is described. By altering the characteristics of the electrical signal driving the valve, the flowrate of liquid through the valve and the pressure drop across the valve during the instantaneous flow can be controll ed with a single actuator. The complex waveform of the solenoid drive signal allows decoupled control of droplet size and average flow rate through the nozzle.