Patent ID: 7744825

Claim:
An ozone generating apparatus comprising: an ozone generator including a discharge chamber having a high voltage terminal and a low voltage terminal, and a plurality of multi-layer flat-ozone generating units stacked within the discharge chamber, each ozone generating unit including, alternately stacked, a plurality of flat-plate high-voltage electrodes and low-voltage electrodes, wherein the multi-layer flat-plate ozone generating units are electrically divided into n groups within the discharge chamber, high-voltage electrode terminals of the multi-layer flat-plate ozone generating units within each group are connected together, and low-voltage electrode terminals of all multi-layer flat-plate ozone generating units are connected together; and an n-phase power supply supplying power to the plurality of multi-layer flat-ozone generating units, the n-phase power supply including a polyphase rectifier rectifying polyphase alternating current (AC) power received from a commercial power source to produce a rectified voltage, an n-phase inverter receiving the rectified voltage and producing n-phase AC power, in each of n phases, at a higher frequency than the AC power received from the commercial source, n serial reactors, one serial reactor being connected in series with each of the phases of the n-phase AC power, and an n-phase transformer receiving the n-phase AC power transmitted by the n serial reactors and increasing the voltage of the n-phase AC power to produce n-phase high voltage AC power, each phase of the n-phase transformer being connected to a respective high-voltage electrode terminal of a corresponding group of the multi-layer flat-plate ozone generating units; and a time division device equally dividing time into at least 3 and no more than n respective sequential intervals and issuing time-decoded signals to the n-phase inverter for controlling phases of the n-phase inverter while maintaining balance gradually for at least 3 of the phases and up to all of the n phases.