▎ 摘　　要

NOVELTY - The accumulator has a shell (1) internally provided with a heat exchange structure. The heat exchange structure is connected with a lattice structure (2). A phase change heat storage material (3) is filled in a gap between the shell and the heat exchange structure. The lattice structure is provided with a periodic lattice structure, a gradient lattice structure, a two-dimensional lattice structure and a three-dimensional (3D) lattice structure, where the shell and the heat exchange structure are made of graphite, silicon carbide, magnesium oxide, aluminium oxide, iron oxide, zirconium oxide, carbon nano tube, carbon fiber graphene and metal, the phase change heat storage material is organic phase change heat storage material with fatty acid, paraffin, straight-chain alkane, fatty alcohol and ester substance and inorganic salt phase change heat storage material with alkali metal, alkaline earth metal halide, nitrate, carbonate, fluoride salt, hydrochloride and sulphate. USE - Phase change heat accumulator e.g. heat storage carrier for use in heat storage technology. Uses include but are not limited to solar energy, wind energy power generation, industrial waste heat recycling and distributed energy system. ADVANTAGE - The accumulator improves structure strength of the heat accumulator under high temperature and high load condition, prevents deformation and crushing and reduces leakage risk of the phase change heat storage material. The heat exchange structure increases the heat exchange area and effectively improves heat exchange performance of a heat storage body. DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a phase change heat accumulator. Shell (1) Lattice structure (2) Phase change heat storage material (3)