Piezo Atomizer Transducer 25mm 1.7MHz

Humidifiers and aroma diffusers are small appliances that we often use. The principle is very simple. MCU is used as the main control. The MOS tube is driven by PWM through the triode push-pull circuit to make the atomizer work near the resonant frequency, and the atomizer generates high frequency. Vibration atomizes the water to produce water mist, which humidifies the air.

Principle of frequency chasing:

The humidifier developed based on the single-chip microcomputer can automatically chase the frequency to the resonance point. Its realization principle is as follows:

The relationship between the voltage across the atomizer sheet and its oscillation frequency is in a normal distribution, as shown in the figure below:

Through the change relationship between voltage and frequency, the software algorithm can be used to track the best frequency point, so that the atomization film always works at the best frequency point.