Abstract: Disclosed is a heat-storage device provided with a supply pipe, a discharge pipe, and a heat-storage container that contains a heat-storage material. A heat-storage material layer comprising said heat-storage material is formed in the bottom of the heat-storage container. The supply pipe supplies a heat-carrying oil, which has a lower specific gravity than the heat-storage material, from outside the heat-storage container to the inside of the heat-storage material layer. The discharge pipe discharges the heat-carrying oil, which had been supplied to the inside of the heat-storage material layer, to the outside of the heat-storage container. The heat-storage device is also provided with a plurality of metal plates (members inside the heat-storage material layer) arranged vertically inside the heat-storage material layer. A metal plate is also disposed such that the upper end thereof is at a height greater than or equal to the vicinity of the upper surface level (L) of the heat-storage material layer.

Abstract: Provided is a heat-storage unit capable of efficiently storing heat in a heat-storage material and sufficiently taking out the stored heat.

Abstract: A heat storage unit capable of efficiently storing heat in a short time. The unit includes: a heat storage container 1a that houses sodium acetate 3, which stores heat by a state change between solid and liquid, and oil 2, which exchanges heat by directly contacting the sodium acetate 3, has smaller specific gravity than that of the sodium acetate 3, and is separated from the sodium acetate 3. Further, the unit includes: a supply pipe 4 that passes at least through the sodium acetate 3 housed in the heat storage container 1a and supplies the oil 2 into the heat storage container 1a; and a discharge pipe that discharges the oil 2 housed in the heat storage container 1a to the outside of the heat storage container 1a. Then, the supply pipe 4 crosses the boundary surface between the oil 2 and the sodium acetate 3 which are housed in the heat storage container 1a, has a plurality of discharge holes that discharge the supplied oil 2a, and at least one of the discharge holes 6 are positioned in the oil 2.

Abstract: Provided is a heat-storage unit capable of efficiently storing heat in a heat-storage material and sufficiently taking out the stored heat.

Abstract: Provided is a heat-storage type heat supplying apparatus capable of supplying a fixed amount of heat-exchange medium to a heat-removing device, by which the heat-removing device is operated efficiently. The heat-storage type heat supplying apparatus has a heat-storage tank that houses erythritol, which stores heat depending on a state change between solid and liquid, and oil that performs heat exchange by contacting the erythritol, has a smaller specific gravity than that of the erythritol, and is separated from the erythritol, in an internal space, takes in the oil in a lower portion of the internal space, and discharges the oil from an upper portion of the internal space. Then, the apparatus has a discharge tube 6 and an intake tube, which supply the oil discharged from the heat-storage tank to a heat exchanger, and a supply tube and a removing tube, which supply the oil, from which heat has been removed in the heat exchanger, to the heat-storage tank.