In an ozone generating system which performs intermittent operation, that is, an operation in an ozone generating operation period in which ozone is generated by discharging gas including oxygen at a discharge electrode part and an operation in an ozone generating operation standby period in which ozone is not generated by stopping discharge are alternately repeated, a gas circulating device which circulates gas in the ozone generating apparatus and removes at least nitric acid from the gas which is circulated is connected to the ozone generating apparatus.

Apparatus and methods for electronic monitoring of ozone generators are provided herein. In certain configurations, an ozone generator includes ozone generation circuitry for producing ozone and a control circuit that monitors the ozone generation circuitry to determine whether or not ozone is being properly produced. The control circuit includes an AC input that receives power from an AC power supply and one or more AC outputs for providing AC output voltages to the ozone generation circuitry. The control circuit further includes one or more AC current sensors used to monitor a status of ozone production by monitoring AC current flowing into the ozone generation circuitry via the control circuit's AC outputs. The control circuit alerts a user of the status of ozone production while avoiding a need for the user to test a treatment fluid for ozone concentration and/or manually inspect or test components of the ozone generator.

Ozone generator cells that include two thermally conductive plates that maintain contact between various layers of the cells in the absence of a bonding agent. The cells lack aluminum-containing materials in the discharge region of the cell.

An ozone generator is contained in a housing having a fan for inducing air flow through the housing and over an ozone generating plate where atmospheric oxygen is electrochemically converted to ozone, which flows out of the housing through a grid opening. The ozone generating plate is defined by a glass plate having electrically conductive grids on both sides thereof and each grid is electrically powered to create corona discharge from the conductor; as air and oxygen in the air flows over the plate it is converted to ozone.

An ozone generating cell includes a corona discharge chamber with a curved side wall. The cell includes a high-voltage electrode, a ground electrode, and a dielectric material positioned between the high-voltage electrode and the ground electrode. The cell includes a gas channel formed between the dielectric material and the ground electrode. The channel has a first end in fluid communication with a gas opening in the dielectric material, which is in fluid communication with a gas port. The channel has a second end in fluid communication with another gas port. The channel further includes multiple concentric segments between the first and second ends of the channel.