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US 5,505,255 AGranted
Heat exchanger for arrangement behind the combustion chamber of a heating boiler
OwnerHans Viessmanninventor
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OwnerHans Viessmanninventor
Estimating the term…
The invention is concerned with a heat-exchanger for arrangement behind the combustion chamber of a heating boiler. The heat-exchanger comprises water-carrying and gas-carrying interior chambers separated from one another by walls extending in parallel and being spirally coiled about a filling member and sealed against one another by bent edges. In order to so form a preferred form of embodiment of a heat-exchanger of this type so that the participating components, considering the coiling process, can be thinly dimensioned and nevertheless insure a pressure-stable final condition, thereby foregoing separate spacers actually not forming part of the heat-exchanger and thereby preventing or substantially preventing during coiling into a spiral the edges to be joined by welding from forming wave-type warpings and the wall faces from deforming, the heat-exchanger according to the invention is designed such that the wall which relative to the coil axis is the inner wall, at the top and at the bottom, includes externally bent edges having a width at most corresponding to the width of the water-carrying passage and the outer wall includes inwardly bent edges having a width corresponding, at most, to half the width (B), which edges overlap the edges of the inner wall or are in alignment therewith and are connected thereto in fluid-tight manner. Corrugated structures of both walls protruding into the gas-carrying passage open at the inlet and outlet sides, are arranged at a distance (D) from the edges in the walls extending substantially in parallel to the coil axis in a mutally supporting manner. The water-carrying passage is sealed at both ends of the spiral except for the forward and return connection openings.
A heat-exchanger for arrangement behind a combustion chamber of a boiler, said heat-exchanger including water-carrying and gas-carrying interior chambers sealed against one another by an inner wall and an outer wall extending in parallel and being spirally coiled about a filling member, the top and bottom of said inner wall including externally bent edges a width of which corresponds to a width of said water-carrying interior chamber, said outer wall including inwardly bent edges of a width corresponding to half said width of said water-carrying interior chamber, said inwardly bent edges of said outer wall overlapping said externally bent edges of said inner wall and said overlapped edges being interconnected in liquid-tight manner, said inner wall and said outer wall including corrugated structures with said corrugated structures of both said walls oriented in a direction of flow protruding into said gas-carrying spiral interior chamber which is open at an inlet side and an outlet side and flowed-through in parallel to the coil axis, with said corrugated structures terminating at a distance before said bent edges of said inner and said outer walls;
A heat-exchanger comprising:
A heat-exchanger comprising:
Dependencies are inferred from the claim text.