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US 5,687,677 AGranted
Heat exchange tube and method of making same
AssigneeDelaware Capital Formation, Inc.
InventorG. Robert Oslin
Life of this patent
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AssigneeDelaware Capital Formation, Inc.
InventorG. Robert Oslin
Estimating the term…
An elongated heat exchange tube and method of making same are disclosed wherein a pair of elongated generally right-angle metallic wall members are adapted for mirror image connection to form an outer tube wall of generally rectangular transverse cross-section. A plurality of internal generally planar heat transfer fins having 90.degree. weld flanges are secured to inner surfaces of the right-angle walls and define longitudinal flow passages through which heated combustion gases are passed to effect improved heat transfer to the outer peripheral wall of the heat transfer tube with enhanced heat convection to a medium in contact with the outer surface of the outer tube wall. A plurality of the heat exchange tubes may be mounted within a compact steam generator for highly efficient production of steam for a steam oven.
A steam generator comprising, in combination, a plurality of substantially identical elongated heat exchange tubes each of which has an outer wall of generally rectangular transverse cross-section, an outer shell extending peripherally about said heat exchange tubes, upper and lower end plates having openings receiving upper and lower ends of said heat exchange tubes in fluid tight relation therewith, said upper and lower end plates maintaining said tubes in parallel spaced relation and being secured to said outer shell so as to establish a fluid chamber about said heat exchange tubes, each of said heat exchange tubes having a plurality of internal generally right-angle fins secured to inner surfaces of said outer wall so as to define a plurality of discrete longitudinal flow passages through which a heated gas may be passed with said internal fins effecting heat transfer to said outer wall so as to convect heat to a fluid disposed within said fluid chamber.
A heat exchange tube comprising a pair of substantially identical elongated outer wall members each of which includes a pair of substantially planar interconnected right-angle walls having connecting flanges formed along longitudinal marginal edges, said connecting flanges being secured in mutually opposed relation so as to form an outer tube having a substantially rectangular transverse cross-section, a plurality of generally planar fin members secured to internal surfaces of said outer wall members so as to establish a plurality of discrete flow passages internally of the heat exchange tube.
A method of making an elongated heat exchange tube having a generally rectangular transverse cross-sectional configuration, said method comprising the steps of:
A heat exchange tube comprising a pair of substantially identical elongated outer wall members each of which includes a pair of interconnected generally right-angle walls having connecting flanges formed along longitudinal marginal edges, said connecting flanges being secured in mutually opposed relation so as to form an outer tube having a longitudinal axis, a plurality of elongated fin members secured to internal surfaces of said outer wall members and extending generally parallel to said longitudinal axis so as to establish a plurality of discrete flow passages internally of the heat exchange tube.
Dependencies are inferred from the claim text.