Patent ID: 8327920
Filing Date: 2012-12-11
Classification: F24H,F28D,Y02E

Abstract:
1. A heat accumulator, comprising: a thermally insulated heat storage vessel having a top wall, a bottom wall and an opening formed in the bottom wall; a quantity of heat accumulating medium arranged within the vessel; a fluid circulation tube of double tube structure inserted from the opening of the bottom wall into the vessel and extending vertically upward toward the top wall of the vessel for introducing a fluid into the vessel and discharging the fluid out of the vessel; and a heat-insulating layer provided on an outer peripheral surface of the fluid circulation tube and extending over at least a longitudinal portion of the fluid circulation tube extending from the bottom wall of the vessel in an upward direction to a predetermined height of the vessel; wherein the heat-insulating layer extends over an entire length of the fluid circulation tube.