Patent ID: 7108836

Claim:
An ozonizer comprising: an electrode module and a manifold block, said electrode module comprising: a flat plate-shaped low voltage electrode including therein an ozone gas passage and a cooling water passage, first and second flat plate-shaped high voltage electrodes facing respective main surfaces of said low voltage electrode, a first flat dielectric plate and a first spacer interposed between said first flat dielectric plate and said low voltage electrode and forming a first discharge gap, the first discharge gap having a thickness, in a laminating direction, and being located between said low voltage electrode and said first high voltage electrode, a second flat dielectric plate and a second spacer interposed between said second dielectric plate and said low voltage electrode and forming a second discharge gap having a thickness, in the laminating direction, and being located between said low voltage electrode and said second high voltage electrode, a first electrode cooling sheet facing a main surface of said first high voltage electrode at a side opposite said first discharge gap and including therein a cooling water passage for cooling said first high voltage electrode, a second electrode cooling sheet facing a main surface of said second high voltage electrode at a side opposite said second discharge gap and including therein a cooling water passage for cooling said second high voltage electrode, a first thermally conducting and electrically insulating sheet sandwiched between said first high voltage electrode and said first electrode cooling sheet, and a second thermally conducting and electrically insulating sheet sandwiched between said second high voltage electrode and said second electrode cooling sheet, wherein ozone is produced in said electrode module by applying an alternating voltage across said low voltage electrode and said first high voltage electrode, and across said low voltage electrode and said second high voltage electrode, respectively, to produce a discharge in said first discharge gap and said second discharge gap into which a gas mixture including oxygen gas is injected, and said manifold block is disposed at one side of said electrode module, between said low voltage electrode and said first electrode cooling sheet, and between said low voltage electrode and said second electrode cooling sheet, respectively, and including therein one of a cooling water passage connecting said cooling water passages in said low voltage electrode, said first electrode cooling sheet, and said second electrode cooling sheet to each other, and an ozone gas passage connected to said ozone gas passage in said low voltage electrode.