Heat storage device

The utility model discloses a heat storage device. The heat storage device comprises at least two layers of lateral walls (1) and a heat-conduction work medium guide pipe (3), wherein chambers (2) containing heat storage materials are formed between the two layers of lateral walls (1), a first end portion of the guide pipe (3) penetrates an outer wall (12) of the two lateral walls (1), and a second end portion of the guide pipe (3) penetrates all the lateral walls (1) and a middle part (33) and winds among the chambers (2) sequentially. In the process of heat storage, hot work medium passes through the guide pipe (3) sequentially from inside to outside to heat the heat storage materials. In the process of heat radiation, cold work medium passes through the guide pipe (3) sequentially from outside to inside and does not heat the heat storage materials. The heat storage device generates a large temperature gradient in the radius direction, effectively lowers the temperature of the surface of the device and is g