Patent ID: 7654306
Filing Date: 2010-02-02
Classification: F28D,Y02E

Abstract:
1. A heat-storage unit comprising: a heat-storage tank; a separating plate that separates an internal space of the heat-storage tank into an upper space and a lower space so as to house a heat-storage material for storing heat by a state change from solid to liquid in the upper space and a heat exchange medium in the lower space and has passage holes through which said heat exchange medium can pass; a first flow pipe that supplies said heat exchange medium to the lower space; a second flow pipe that is connected to said first flow pipe and the separation plate, has a portion passing through at least said heat-storage material, and discharges said heat exchange medium, which flows through the inside of the second flow pipe, from a discharge port to the outside of said heat-storage material; and a shutoff section that shuts off said second flow pipe corresponding to the state change of said heat-storage material, the shutoff section being disposed between the discharge port and the portion passing through at least said heat-storage material, wherein heat is exchanged by direct contact between the heat exchange medium and the heat-storage material, and the heat-exchange medium has a smaller specific gravity than the heat-storage material.