▎ 摘　　要

NOVELTY - The device has a heat storage body whose middle portion is provided with a hole as an air heat exchange flow passage (4). A heat storage structure (3) is fixed in a heat preservation layer (2). The heat storage structure and the heat preservation layer are respectively connected with a first reserved space and a second reserved space. The first reserved space is divided into an upper channel and a lower channel by a space separating plate (7). A coil pipe heat exchanger (8) is provided with an air channel shell. An end of a heat exchange coil pipe is connected with a steam inlet and outlet pipeline (9). A fan inlet (5) and an air channel shell form a heat exchange circulating space. USE - Phase change brick heat storage device for heat accumulation of material as medium to make solar photo-thermal, geothermal, industrial waste heat and low-grade waste heat. ADVANTAGE - The device utilizes low-grade heat source steam for heat storage, and combines solid heat storage and molten salt heat storage, which improves utilization rate of energy, realizes the application of large-scale heat generation, and avoids the defect of strong corrosiveness of molten salt. The device uses the electric energy to improve the heat accumulation power, and realizes strong flexibility. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a working method for a phase change brick heat storage device. DESCRIPTION OF DRAWING(S) - The drawing shows a front view of a phase change brick heat storage device in partial section.(Drawing includes non-English language text). 2Heat preservation layer 3Heat storage structure 4Air heat exchange flow passage 5Fan inlet 7Space separating plate 8Coil pipe heat exchanger 9Steam inlet and outlet pipeline