▎ 摘　　要

NOVELTY - The heat exchanger has a heat exchanger main structure whose outer surface is coated with a radiating layer. The radiating layer comprises a graphene material. The thickness of the radiating layer is 10-20 microm. The thickness of the radiating layer is 15microm. The graphene is a single-layer sheet structure.The graphene comprises carbon element and non-carbon element. The non-carbon element is selected from fluorine, nitrogen, oxygen, sulphur, and chlorine. The heat-conducting filler is selected from boron nitride, barium sulphate and beryllium oxide. The temperature of the baking device is raised to the second temperature. USE - Heat exchanger for use in an air conditioner (claimed) of a data center server. ADVANTAGE - The heat exchanger has high heat exchange efficiency, and effectively improves the high pressure resistance of the air conditioner system, and improves the refrigerating amount, the whole machine power consumption, the air conditioning system energy efficiency and the fault risk of the system high pressure stopping, and reduces the temperature of the refrigerant in the surface of the exchanger. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the surface coated with a graphene radiating layer of copper heat exchange process. (Drawing includes non-English language text). Diameter of inner wall of copper pipe (d1) Outer wall diameter of the copper pipe (d2) Diameter of outer wall of graphene coating (d3) Heat conducting coefficient of copper pipe (T1) Temperature of inner wall of copper pipe (T2) Outer wall temperature of copper pipe (T3) External airflow temperature (T4) Outer wall temperature of graphene coating (T5)