Sunlight irradiation is a method of killing microorganisms by ultraviolet radiation in sunlight. Ultraviolet rays have a certain disinfection and sterilization effect, which can inhibit some molds and bacteria on the surface. However, exposure to the hot sun can not completely remove microorganisms and spores from articles, especially for molds that go deep into articles, the penetration ability of ultraviolet rays is very limited, and it is difficult to achieve sterilization effect.

The sterilization function of the disinfection cabinet usually adopts the combination of high temperature and steam. High temperature and steam can effectively kill most common bacteria and molds. However, sterilization does not guarantee that the article will never be moldy, because mold often exists in the environment and can reattach to the surface of the article. If the environment is humid or the storage conditions are improper, new molds may still breed again.