▎ 摘　　要

NOVELTY - The device has a heat exchange device connected with a water inlet and an outlet channel for exchanging cold and hot water with phase change latent heat energy, where the exchange device is connected with a waterway in a graphene carbon nano heating pipe protection shell for forming a channel of preheating and secondary circulation heating. A graphene carbon nano heating tube i.e. quartz glass tube, is provided with two transparent ends. The first transparent end is plated with a conductive film and an electrode on an inner side of a tube wall. The carbon nano heating pipe protection shell is combined into a secondary circulating heating device. USE - Phase change energy storage heat exchange device. ADVANTAGE - The device is independently used in coating tube or combined with the outer coating tube. The device has better energy-saving effect, and improves life quality of people so as to improve working efficiency of production. The device has low maintenance cost, and avoids difficulties to realize civil and distributed independent unit miniaturization use. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a phase change energy storage heat exchange device. 1Heat exchange device shell body 3Cold water inlet 5Heating phase change medium 6Protective shell upper and lower sealing cover plate 7Outer coating heating pipe upper and lower sealing cover plate 12Heat exchange pipe