Experimental research on ultrasonic atomization performance

For the better performance of piezoelectricity actuated ultrasonic nebulizer, some factors, which may have effect on the performance, are analyzed. A conclusion that the change of the cone angle in the vibration of the nebulizer does some contribution to the performance is got. According to this fact, a concept “moving cone angle” is put forward. The working principle of “moving cone angle” is introduced, and the specific effects of “moving cone angle” on the performance of nebulizer are explained. Some samples of piezoelectricity actuated ultrasonic nebulizer is used to test what effects “moving cone angle” acts on the atomization quantity and the size of the droplet. The experimental results show: In the resonance frequency 143kHz, under different voltages, the atomization quantity of forward cone nebulizer (top cone diameter is smaller than bottom cone diameter) is much larger than the atomization quantity of reverse cone nebulizer (bottom cone diameter is smaller than top cone diameter); the size of the droplet mainly depends on the top cone diameter.