The ultrasonic nozzle includes a piezoelectric transducer, and when energizes, the ultrasonic nozzle is vibrated with high frequency. The design of these transducers causes the nozzle to vibrate, so the tip of the nozzle is vibrated at a few thousand times per second. When the thin film liquid is applied to the tip of the ultrasonic nozzle, a capillary wave is formed. The amplitude of these waves can be easily controlled by ultrasonic generators, and increase the amplitude to these erected worms becomes too high without supporting itself. Since these remaining waves are continuously extended, the material is abandoned, and the highly uniform droplets of micron size are started. Under appropriate conditions, atomization can last for a long time.
These stationary liquid waves can extend upward from the top end of the ultrasonic nozzle until they are separated into uniform size droplets, almost no kinetic energy. If desired, the secondary shaped gas or ambient air can be used to easily form the droplets to form the desired shape and speed. Making a variety of ultrasonic nozzles help determine the droplet size, liquid flow rate and spray mode. Since the launch of commercialization in the 1970s, ultrasonic spray still retains many identical basic principles. Extension of various frequencies to introduce ultrasonic spray systems into harsh environments such as spray hot solution, CVD and vacuum.
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