▎ 摘　　要

NOVELTY - The home appliance (1) has a cooling device that contains metal materials (20) in metal plate (201) form or in metal element (202) form. A graphene layer (30) is coated into the surface (203) of metal material which is made of carbon atoms (31). The graphene layer has six carbon atom (31) that are arranged with hexagonal shaped portion. Each bonds (32) are formed between the carbon atoms. The metal material contains multi-layer graphene layer. The metal materials and metal plates form inner liner of home appliance. USE - Home appliance. ADVANTAGE - The aesthetic appearance of home appliance is improved. The structure of home appliance is simplified. DETAILED DESCRIPTION - The metal materials are formed in metal plate or metal element. The surface of metal material is coated with graphene layer. An INDEPENDENT CLAIM is included for method for obtaining metal material coated with graphene layer, involves the obtaining carbon atoms in gas form by heating ambient air. The surface of metal material is heated. The carbon atoms is provided to held by precipitating carbon atoms into surface of metal material in same ambient. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the inner liner and doors of home appliance. Home appliance (1) Door (11) Inner liner (101) Metal plate (201) Metal element (202)