Ozone generation apparatus

An ozone generation apparatus comprising:

• a cylindrical shaped first electrode;
• a cylindrical shaped second electrode disposed coaxially with the first electrode and disposed in the first electrode;
• a dielectric disposed between the first electrode and the second electrode;
• and
• a power supply for applying a voltage between the first electrode and the second electrode,
• wherein
• dry air is supplied between the first electrode and the second electrode as raw material gas, a voltage is supplied between the first electrode and the second electrode from the power supply to generate discharge, and ozone is generated by the discharge,
• a discharge gap length d formed by the first electrode, the second electrode, and the dielectric is set to be in a range of 0.3 to 0.5 mm,
• a pd product, which is a product of the discharge gap length d and a gas pressure p of the raw material gas, is in a range of 6 to 16 kPa·cm, and
• the discharge gap length p and the gas pressure p of the raw material gas are set to satisfy expression
• (pd−250d−3.16)2+150d<12.5.