The health bureau checks that the disinfection cabinet is ultraviolet. Ultraviolet rays can only travel in a straight line, with low radiation energy and weak penetration, and can only kill directly irradiated microorganisms. When disinfecting, try to expose the disinfected parts to ultraviolet rays. Ultraviolet is a short wave whose wavelength is outside the visible range. According to the radiation principle, it is a kind of visible blue light, which has no disinfection effect. Infrared rays will generate a lot of heat for high-temperature disinfection. Tableware is mostly plastic, so it is naturally impossible to disinfect with infrared rays.