Patent ID: 7946844

Claim:
A heat accumulating burner, comprising a burner tile, a heat accumulating portion including a heat accumulating element in it, said heat accumulating burner operating by alternately repeating heat accumulation and combustion where exhaust gas is passed through said heat accumulating portion to heat said heat accumulating element so as to accumulate heat therein, and then, combustion air is passed through said heat accumulating portion to preheat said combustion air by thermal exchange with said heat accumulating element holding the heat accumulated therein, and said preheated combustion air is used to carry out combustion, wherein said heat accumulating element extends orthogonally with respect to a flow passage through said burner tile, a cross-sectional area of said heat accumulating element at a furnace-inner side is made to be smaller than a cross-sectional area of said heat accumulating element at an air supply/discharge port side, and a thickness of a fireproof heat insulating member that covers said heat accumulating element is thicker at the furnace-inner side of the heat accumulating element than at the air supply/discharge port side of said heat accumulating element, wherein said heat insulating member has a tapered inner surface and an opening in said burner tile has a tapered inner surface, and wherein said heat insulating member tapered inner surface and said burner tile opening tapered inner surface co-exist and extend along a common inclined surface to form a single and substantially integral tapered opening through which the preheated combustion air flows.