▎ 摘　　要

NOVELTY - The utility model relates to the technical field of water disinfection, claims an underwater ultraviolet sterilizing device, comprising a heat conducting shell whose bottom is hermetically connected with a transparent quartz glass sheet, the surface of the transparent quartz glass sheet is covered with a transparent first graphene film layer, the upper end face of the transparent quartz glass sheet and the inner side surface of the heat conducting shell body are surrounded to form a sealing cavity, the lower part of the sealing cavity is provided with an ultraviolet lamp opposite to the transparent quartz glass sheet. when using, the heat conducting shell is placed in water, the ultraviolet emitted by the ultraviolet lamp is irradiated to the water through the transparent quartz glass sheet and the first graphene film layer; it is capable of sterilizing the water at the deeper position; Moreover, the first graphene film layer covered on the transparent quartz glass surface has excellent heat conducting performance, the first graphite film layer can conduct the heat in the sealing cavity to the water below the transparent quartz glass, realizing the radiating of the ultraviolet lamp, ensuring the service life of the ultraviolet lamp is normal.