A humidifier reduces the noise generated by the dropping of water droplets and can also vent bacteria-destroyed mist. An auxiliary water tank is installed under a water supply tank for receiving the water supplied from the water supply tank. An ultrasonic humidifying vessel is connected to the...http://www.google.fr/patents/US5693266?utm_source=gb-gplus-shareBrevet US5693266 - Heating-type ultrasonic humidifier
