Fractal netty phase change energy storage device

The invention discloses a fractal netty phase change energy storage device. The fractal netty phase change energy storage device consists of an energy storage unit body and a refrigerating medium channel; the refrigerating medium channel is positioned in the energy storage unit body; the energy storage unit body consists of a shell, a heat transfer rib sheet and a phase change material; the heat transfer rib sheet adopts a fractal netty structure and is arranged in a shell; a non-heat-transfer rib sheet area in the shell is filled with the phase change material; and the heat transfer rib sheetadopts a fractal netty structure, the grade number is m grade, m is more than or equal to 2 and is an integer, the dispersing coefficient N of each grade of heat transfer rib sheet is equal to 4, namely, each j-th grade of heat transfer rib sheet generates 4 (j+1) grade heat transfer rib sheet, and the center of the (j+1) grade heat transfer rib sheet is positioned at four vertex angles of the j-th grade heat transfer ri