▎ 摘　　要

NOVELTY - Preparing graphene coating involves adding 1-2 pts. wt. graphene to 8-12 pts. wt. solvent, and performing radiation oxidation treatment to obtain a preliminary dispersion of graphene. The 35-45 pts. wt. dispersing agent added to the preliminary dispersion of graphene, ultrasonic vibration for 0.8-1.5 hours, ultrasonic frequency of 35-45 kilohertz, to obtain a graphene secondary dispersion. The 90-110 pts. wt. adhesive and 45-55 pts. wt. thickener added to the graphene secondary dispersion, mixed and stirred for 2.5-3.5 hours, mixed well, and let stand for 0.8 -1.5 hours. The 1-3 pts. wt. composite conductive agent, 1-2 pts. wt. carbon fiber filler, 1-2 pts. wt. hydrophobic filler, 1-2 pts. wt. nano titanium dioxide added to the solution, and mixed and stirred for 1.5-2.5 hours. The 2.5-4 pts. wt. low surface energy organic matter added to the solution, mixed and stirred for 1-2 hours, and obtain a graphene coating liquid after the mixing. USE - Method for preparing graphene coating used for heat exchanger (claimed). ADVANTAGE - The method enables to prepare graphene coating has improves heat exchange efficiency, and has improves the refrigerating device performance. DETAILED DESCRIPTION - Preparing graphene coating involves adding 1-2 pts. wt. graphene to 8-12 pts. wt. solvent, and performing radiation oxidation treatment to obtain a preliminary dispersion of graphene. The 35-45 pts. wt. dispersing agent added to the preliminary dispersion of graphene, ultrasonic vibration for 0.8-1.5 hours, ultrasonic frequency of 35-45 kilohertz, to obtain a graphene secondary dispersion. The 90-110 pts. wt. adhesive and 45-55 pts. wt. thickener added to the graphene secondary dispersion, mixed and stirred for 2.5-3.5 hours, mixed well, and let stand for 0.8 -1.5 hours. The 1-3 pts. wt. composite conductive agent, 1-2 pts. wt. carbon fiber filler, 1-2 pts. wt. hydrophobic filler, 1-2 pts. wt. nano titanium dioxide added to the solution, and mixed and stirred for 1.5-2.5 hours. The 2.5-4 pts. wt. low surface energy organic matter added to the solution, mixed and stirred for 1-2 hours, and obtain a graphene coating liquid after the mixing. The graphene coating liquid is uniformly coated on the heat-dissipating scale and the metal pipe on the heat exchanger body, and dried and solidified to obtain a graphene coating. An INDEPENDENT CLAIM is included for a method for a heat exchanger, which comprises: (A) heat exchanger body, a metal pipe equipped on the heat exchanger body; (B) a heat dissipating scale equipped on the heat exchanger body; and (C) graphene coating provided on the surface of the metal conduit and the surface of the heat dissipating fin.