An optically reflective plate used for air conditioner, refrigerator, etc is composed of a wedged reflecting plate made of transparent material and with smooth internal surface, and a light source installed at one side of said reflecting plate, which may be ultraviolet light source. Said reflecting plate has a thickness variable with the distance from light source and a concave point array on its back. The density of concave points varies with the distance from light source. The shading material is arranged on three side surfaces and the back of said reflecting plate. A photocatalytic disinfecting deodourizing unit is installed in the front of said reflecting plate. |