Ultraviolet light is a commonly used light source for sterilization and disinfection. Its mechanism of action is to destroy the cell walls of bacteria, viruses, and nucleic acid molecules, causing them to lose their reproductive ability and vitality, thereby achieving sterilization effects. Laboratory test results show that the sterilization rate of ultraviolet sterilized washing machines can reach over 99.9%, so ultraviolet sterilization of washing machines is useful.