FIELD: physics.
SUBSTANCE: invention relates to irradiation device for the ultraviolet radiation generation. Irradiating device for generating ultraviolet radiation is used in particular in food processing or in water treatment. Device comprises an ultraviolet irradiator having the irradiator tube made of quartz glass, or surrounded by a cylindrical protective tube made of quartz glass ultraviolet irradiator having the irradiator tube made of quartz glass. Irradiator tube and/or protective tube is coated with dirt and water repellent coating in the form of alcohol dispersion containing nanoparticles of titanium dioxide and from 20 vol. % to 60 vol. % of ethanol.
EFFECT: technical result of the invention is to increase the lifetime of the irradiating device.
9 cl, 2 dwg, 3 tbl
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