Abstract: A rotary ozonizer includes a drive motor for driving a rotor and an air compressor. The rotor is housed in a cylindrical body serving as an stationary electrode. The rotor is secured to a rotor shaft extending through the cylindrical body and rotating upon rotation of the motor through an insulating joint. The rotor serves as a rotary electrode, and provides an electrical discharge spaced relative to the cylindrical body. Electrical power supply portions are connected to the rotor and to the stationary electrode, and end plates are provided to cover open ends of the cylindrical body. The end plates rotatably support the rotor shaft. The motor, the insulating joint, the cylindrical body and the compressor are aligned coaxially in one of the embodiments of the present invention.

Abstract: A rotary ozonizer has a base, a disk-shaped stationary electrode mounted on the base, and a rotary electrode unit disposed over the stationary electrode in face-to-face relation to form an electric discharge clearance. The rotary electrode unit comprises a plurality of radially outwardly extending arms, and upstanding blades fixed to the radially outer portions of the arms, respectively. When the rotary electrode unit is rotated about a vertical axis by a motor and a high voltage is applied between the electrode and electrode unit, an electric discharge takes place to ozonize the oxygen in said electric discharge clearance, and the thus produced ozone is supplied by the blades out of the ozonizer.