Fluid filter system, fluid treatment system and water treatment system

The utility model relates to a fluid filter system, a fluid treatment system and a water treatment system. In one embodiment, the fluid treatment system comprises a radiation chamber with ultraviolet lamps, wherein a swirl vane pack is arranged at an inlet of the irradiation chamber and is used for generating clockwise and counterclockwise swirls in fluid entering the irradiation chamber. In other embodiments, a central filter medium element is utilized, and the radiation chambers with ultraviolet lamps are arranged into a circle around the central filter medium element. In other embodiments, mechanical scraper discs are provided for scraping dirt off from filter media and lamp tubes. In other embodiments, the ultraviolet lamps are located in the central irradiation chamber and a plurality of filter medium pipes surround the ultraviolet lamp. In other embodiments, a mechanical scraper is provided for the ultraviolet lamp, and a rotating type drainage arm is arranged for backwashing each single filter tube. In