ULTRAVIOLET RAY FLUORESCENT LAMP AND PURIFIER

PROBLEM TO BE SOLVED: To properly realize different actions with one lamp, by emitting light with different wave lengths, by providing double tubes of an ultraviolet ray transmitting material having dosed spaces formed at both ends by a dearance between the tubes, and discharge electrodes disposed in the dosed spaces in the vicinity of both ends of the double tubes. SOLUTION: A ultraviolet ray lamp 50 consists of an inner tube 52, an outer tube 54, and discharge electrodes 56 and 58 disposed at the end of both tubes. A clearance between both tubes forms a closed space 64 by its end blocked by block parts 60 and 62. For instance, a fluorescent material to convert an ultraviolet ray of 253.7 nm emitted from mercury by discharge into an ultraviolet ray of mainly 184.1 nm is painted on the peripheral surface (closed space 64 side) of the inner tube 52, quartz glass to emit the ultraviolet ray of 253.7 nm as it is used for the outer tube 54, and ultraviolet ray sterilizing and ozone sterilizing utilizing ozone produced by oxygen can be carried out with one lamp.