JPH05309300

PURPOSE:To surely maintain the stabilization for an atomization effect and to improve the reliability as the device by providing an enclosing dam body below a shaft body for sucking liquid in such a manner that the immersing liquid level of a shaft body part can be controlled by the liquid damming up effect thereof and connecting an ultrasonic sensor and a voltage impressing part to form an ultrasonic signal transmission circuit. CONSTITUTION:The ultrasonic atomizing device 1 is immersed into a liquid tank H and is disposed by maintaining a depth hu between the aperture 13 of the enclosing dam body 3 and the base of the liquid tank H. The infiltration of the liquid L into the enclosing dam body 3 is prevented by the damming up effect of the enclosing dam body 3 and only the part of the length D of the projecting part of the lower shaft body 8 projecting from the aperture 13 is immersed into the liquid This specified immersion state is maintained until the liquid level in the liquid tank H lowers to the position of the depth hu and the stable atomization effect is maintained by the same atomization energy. Since an ultrasonic sensor 4 is used, the ultrasonic waves radiated into the liquid are surely transmitted to the ultrasonic sensor 4 regardless of whether the liquid L is a conductive liquid or nonconductive liquid.