What is Ultrasonic Atomization?

Compared with traditional atomizing nozzles, ultrasonic atomizer has better quality and is more environmentally friendly and convenient to use.

The atomizer uses high-frequency sound waves (beyond the range of human sound perception) to produce atomization. The disk-shaped piezoelectric ceramic transducer receives the high-frequency electrical energy from the wideband ultrasonic generator and converts it into vibrating mechanical motion of the same frequency. Two titanium cylinders with transducers enhance mechanical vibration. The shock wave formed by the transducer produces a continuous sound wave along the length of the nozzle. The amplitude of the acoustic wave reaches the atomizing surface, which is the small diameter part located at the front of the nozzle. In general, high frequency nozzles are smaller in size and produce smaller droplets, while low frequency nozzles have smaller flow. Fluid is introduced to the atomic surface through a large, unblocked channel that runs the entire length of the nozzle. The liquid on the atomized surface absorbs vibration energy and is therefore atomized.

The typical nozzle body is made of titanium material with excellent acoustic properties, high tensile strength and excellent corrosion resistance. The protective enclosure is made of 316 stainless steel (titanium is optional).

The input energy is used to distinguish the ultrasonic nozzle from other ultrasonic equipment, such as ultrasonic welding machine, ultrasonic emulsifier, ultrasonic cleaning machine, etc. The operating power of those ultrasonic equipment is usually a few hundred kilowatts or a few kilowatts, but for ultrasonic atomization, the input power level is generally 1 to 15 watts.

Atomization spraying is to use the piezoelectric effect to convert electrical energy into high frequency mechanical energy, thus atomizing the liquid. The liquid was atomized into uniform micron particles by ultrasonic high frequency oscillation. Compared with traditional pressure nozzles, ultrasonic spraying can obtain a more uniform, thinner, more controllable film coating, which is less likely to clog the nozzle. Because ultrasonic nozzles require only minimal kPa air volume, there is almost no splash during the spraying process, so the paint utilization rate is up to 90%.

Atomization spraying is a successful technique for applying high performance and high quality thin coatings to substrates. Through the precise control of the process parameters of ultrasonic atomization, excessive atomization is avoided and accurate droplet distribution is realized.The advantage of ultrasonic atomization is that it can completely control the droplet size, spray intensity and droplet velocity. Industrial ultrasonic nebulizers are easy to replace.Ultrasonic spray drying is a very effective non-heat treatment technology. Because of its mildness, it is a very effective heat sensitive material.