Patent ID: 8226894

Claim:
An ultrasonic treatment apparatus comprising: (a) a treatment vessel for accommodating a medium; (b) an ultrasonic element for generating ultrasonic waves in the treatment vessel, irradiating the medium accommodated in the treatment vessel with the ultrasonic waves, and decomposing water present in the medium to generate hydroxyl radicals; (c) an ultrasonic element driving circuit for driving the ultrasonic element; (d) an operation section for setting given sterilization conditions determined based on the amount of the generated hydroxyl radicals upon generation of the ultrasonic waves; (e) a spreading device provided on a bottom wall of the treatment vessel and comprising a main body projecting upward from the bottom wall and immersed in the medium accommodated in the treatment vessel, the spreading device spreading ultrasonic waves generated by the ultrasonic element in the treatment vessel; and (f) an ultrasonic deflection device detachably disposed on the top of the main body, and deflecting the ultrasonic waves generated by the ultrasonic element sidewards.