The core structure of an ultrasonic humidifier consists of a water tank, an ultrasonic transducer, a fan, a control board, a mist outlet, and a water level sensor. Each component has a clear function and works collaboratively, directly determining the humidification effect, lifespan, and safety. Specifically:
Water Tank: This is the core component for storing water. It is usually made of food-grade PP or ABS plastic, although some high-end models use glass. Its core function is to provide a stable water source for humidification. The material must be safe, non-toxic, odorless, heat-resistant, corrosion-resistant, and not prone to bacterial growth. The water tank must be well-sealed, with no leaks, and its capacity must be appropriate for humidification needs (typically 1-5L for household use). It should also be easy to disassemble and clean to prevent scale and bacteria buildup.
Ultrasonic Transducer: This is the core working component of the humidifier, installed at the bottom of the water tank. Its core function is to convert electrical energy into high-frequency ultrasonic vibrations, breaking water molecules into tiny droplets. The oscillator should have a stable vibration frequency (typically 20-100kHz), uniform atomization, and no abnormal noise; excellent waterproof performance to prevent water ingress and short circuits; and be wear-resistant, aging-resistant, and have a long service life to avoid frequent damage.
The fan, installed above the oscillator, is primarily responsible for dispersing the mist generated by the oscillator and delivering it into the air through the mist outlet to accelerate humidification. The fan speed should be adjustable, with uniform airflow and low noise (typically ≤35dB) to avoid disrupting daily rest and work; good heat dissipation to prevent overheating damage during prolonged operation; and the airflow strength must match the atomization volume to ensure uniform mist diffusion and prevent localized water accumulation. The control panel is the humidifier's "control center," responsible for adjusting atomization volume, timer, and on/off functions. It should have sensitive buttons, be easy to operate, have a clear display, and include water shortage protection to prevent the oscillator from burning out. Fog outlet: Used to output mist droplets. It should have a moderate diameter, allow for smooth mist droplet output, and be able to rotate 360° to facilitate adjustment of the mist droplet diffusion direction. Water level sensor: Monitors the water level in the tank in real time. When the water level is too low, it triggers the water shortage protection and automatically shuts off the vibrator to prevent dry burning. It should have high sensitivity and a fast response to avoid false triggering or failure to trigger the protection.
