WATER PURIFYING DEVICE

摘要

PROBLEM TO BE SOLVED: To maintain stable high water purifying performance over a long period. SOLUTION: This water purifying device is provided with a light source 4 for emitting light containing ultraviolet ray, a light transmissive member 5 formed so as to cover the light source 4 and transmitting light from the light source 4 and a light excitation thin film 6, which is formed on the outer surface of the light transmitting member 5 in contact with a water-bearing liquid to be purified and is excited by the light from the light source 4 to purify the water-bearing liquid to be purified by a chemical reaction.