Sonics VC50 AT (1990) - Manual (Page 4)

4
INSTALLING THE ULTRASONIC PROCESSOR
The Ultrasonic Atomizer should be installed in an area that is free from excessive dust,
dirt, explosive and corrosive fumes, and extremes of temperature and humidity.
SECTION II – OPERATION
PRINCIPLES OF ULTRASONIC ATOMIZATION
The ultrasonic power supply converts 50/60 Hz line voltage to high frequency 20 kHz
(20,000 cycles per second) electrical energy. His electrical energy is transmitted to the
piezoelectric transducer with in the converter, where it is changed to mechanical
vibrations. The ultrasonic vibration are intensified by the nozzle and focused at the tip
where the atomization takes place. The liquid travels through the nozzle, and spreads out
as a thin film on the atomizing surface. The oscillations at the tip disintegrate the liquid
into micro-droplets, and then eject them to form a gentle, low velocity spray.
Unlike conventional atomizing nozzles that rely on pressure and high-velocity notion to
shear a fluid into small drops, the Ultrasonic Atomizer does not require any pressure, and
instead uses only low ultrasonic vibrational energy for atomization. The liquid can be
dispensed to the nozzle by either gravity feed or a small metering pump, and atomized
continuously or intermittently. In contrast to pressurized systems, the velocity of the
droplets generated is very low-only 0.2 to 0.4 m/sec., compared with 5 to 20 m/sec.