US 12,320,549 B2
Tube winding for a gas heat exchange cell for a boiler
Rocco Giannoni, Milan (IT); and Giuseppe Bucci, Milan (IT)
Assigned to Condevo S.P.A., Milan (IT)
Filed by CONDEVO S.P.A., Milan (IT)
Filed on Sep. 26, 2022, as Appl. No. 17/952,484.
Claims priority of application No. 102021000025346 (IT), filed on Oct. 4, 2021.
Prior Publication US 2023/0108472 A1, Apr. 6, 2023
Int. Cl. F28F 1/02 (2006.01); F24H 1/43 (2022.01); F28D 21/00 (2006.01); F28F 1/04 (2006.01)
CPC F24H 1/43 (2013.01) [F28D 21/00 (2013.01); F28F 1/04 (2013.01); F28D 2021/0024 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A tube profile, for manufacturing a heat exchanger for a boiler, wherein a cross-section of the tube profile comprises:
a rectangular portion having two greater sides parallel to each other and two smaller sides parallel to each other and orthogonal to the greater sides, and
an ogival portion defined by a convex flat figure formed by a base and two curved sides connected to each other in an apical zone opposite to said base, wherein said base coincides with a first side of said two smaller sides of the rectangular portion, wherein said two curved sides are symmetrical to an axis of symmetry) parallel to said greater sides and passing through central points of said smaller sides, wherein one end of each of said two curved sides joins with continuity to one end of a respective one of said two greater sides in a joining point, said each of said two curved sides being tangent to said respective one of said two greater sides in said joining point, and wherein an overall dimension of said ogival portion measured along said axis of symmetry is greater than the length of said base;
wherein the two greater sides, a second side of said two smaller sides, and said two curved sides define the outer surfaces of the walls of said tube profile.