A component used in an air conditioner includes a substrate and a nano-coating formed on a surface of the substrate, wherein the nano-coating includes a lower coating formed on the surface of the substrate; and an upper coating formed on the upper surface of the lower coating, a coating composition of the upper coating includes nanoparticles having a diameter of 10 nm to 30 nm, and an interval between adjacent nanoparticles among the plurality of nanoparticles located on a surface of the upper coating is 10 nm to 30 nm.