Working principle: Infrared heat-induced negative ion sterilization, using natural plant volatile materials, releasing plant factors in the air, actively capturing bacteria, eliminating odor molecules, completely harmless to the elderly and children. scenes to be used 1 Hanging on top of the open-form pet toilet, it can also be adapted to most closed toilets on the market. 2 Family bathroom, attached or fixed to the top of the toilet or the basin, the distance from the toilet or basin is no more than 30CM, and the distance from the toilet or basin is about 1M, ensuring that it is within the human body sensing range. 3 public toilet, attached to the top of the urinal, to ensure that it is within the human body sensing range.