humidification;  ultrasound;  Dynamic characteristics

An ultrasonic humidifier that can be applied to small devices or laboratories to regulate humidity, which humidifies by humidifying the oscillator excitation to produce uniform mist water particles with a diameter of several microns. After analyzing the working process of the humidifier, the dynamic mathematical model of humidifier humidification was derived according to the principle of mass balance, and the dynamic performance simulation and experimental analysis of a specific device were carried out. The results show that the step response time constant simulated by the dynamic mathematical model established in this paper and the relative humidity of the humidifier outlet under different duty cycles are close to the experimental results, which can better reflect the humidification process in the humidifier. In addition, simulation and experimental results also show that the humidification device can control the humidity of the outlet within a wide range according to the different working time cycles of the humidifier.