Ultrasound humidifiers
Ultrasound humidifiers feature a small water storage tank and piezoelectric transducers installed at the bottom of the tank. The surface of the transducer oscillates at a very high speed (1.65 million times per second), so as to prevent the water from moving (the water cannot keep up with the oscillations of the transducer) due to its mass inertia. As a consequence, a column of water is generated above the transducers. During the negative amplitude of the transducer, an instant vacuum is produced because the water cannot follow the very fast transducer movements. The cavity created allows the production of bubbles, which are pushed to the edge of the water column during the positive amplitude phase, where they collide. During this process, very fine particles of water are atomized on the edge of the column of water. Due to the sound waves, cross waves are produced directly underneath the surface of the water, in the center of which very small water droplets are separated thus g...