Heat exchanger with a bank of tubes contained in a cylindrical casing
AssigneeValeo Thermique Moteur
InventorsHélène Laudic, Jacques Hoffnung
Life of this patent
Estimating the term…
Abstract
Heat exchanger for recovering heat from the exhaust gases of a motor vehicle, in which the exhaust gases circulate between two manifolds delimited by respective caps and by the end walls of a cylindrical casing, passing in tubes which are elongated in the axial direction in the casing. The caps are produced by stamping from a thin sheet metal, which leads to a reduction in weight and in cost and allows the caps to remain fitted snugly by elasticity on the ends of the casing, until brazed.
Claims19
A heat exchanger for heat transfer between a first fluid and a second fluid, the heat exchanger comprising:
- a casing of generally axisymmetric cylindrical shape formed by two end walls and a cylindrical peripheral wall equipped with inlet piping and outlet piping for the first fluid;
- a bank of tubes elongated parallel to the axis of the casing, end regions of each tube passing, in fluid-tight fashion, through apertures formed in said end walls, and outer faces of the bank of tubes delimiting, within the casing, a chamber for circulation of the first fluid;
- and two axisymmetric annular caps, each respectively capping ones of said end walls of the casing and connected in a leak tight way to the periphery of said end wall, so as to define manifolds which communicate with each other via the bank of tubes for circulation of the second fluid, central apertures in the caps constituting respectively an inlet aperture and an outlet aperture for the second fluid, wherein the caps are made from stamped sheet metal, and wherein the casing and the caps have a slightly oval shape, the casing have an external diameter and the caps having an internal diameter;
- the external diameter of the casing having a minimum value less than the minimum value of the internal diameter and having a maximum value greater than the maximum value of the internal diameter.
A heat exchanger for heat transfer between a first fluid and a second fluid, the heat exchanger comprising:
- a generally cylindrical casing formed by two end walls and a cylindrical peripheral wall equipped with piping for said first fluid, said end walls having apertures;
- a bank of tubes elongate parallel to the cylindrical axis of said casing, end regions of each tube passing in fluid-tight fashion through said apertures in said end walls, outer faces of said tubes delimiting a chamber within said casing for circulation of said first fluid;
- and
- two axisymmetric annular caps, each of said caps connected in a leak tight way to the periphery of ones of said end walls to define a manifold, the first of said caps defining a first manifold, the second of said caps defining second manifold, said first manifold communicating via said bank of tube with said second manifold for circulation of said second fluid, central apertures in each of said caps constituting apertures for said second fluid, wherein said caps are made from stamped sheet metal.
A heat exchanger for heat transfer between a first fluid and a second fluid, the heat exchanger comprising:
- a casing of generally axisymmetric cylindrical shape formed by two end walls and a cylindrical peripheral wall equipped with inlet piping and outlet piping for the first fluid;
- a bank of tubes elongated parallel to the axis of the casing, end regions of each tube passing, in fluid-tight fashion, through apertures formed in said end walls, and outer faces of the bank of tubes delimiting, within the casing, a chamber for circulation of the first fluid;
- and
- two axisymmetric annular caps, each respectively capping ones of said end walls of the casing and connected in a leak right way to the periphery of said end wall, so as to define manifolds which communicate with each other via the bank of tubes for circulation of the second fluid, central apertures in the caps constituting respectively an inlet aperture and an outlet aperture for the second fluid, wherein the caps are made from stamped sheet metal.
An axisymmetric annular cap comprising
- a cylindrical portion;
- a flared portion adjacent said cylindrical portion in a first direction and situated at a first axial end of said cap;
- a frustoconical portion adjacent said cylindrical portion in a second direction, said frustoconical portion progressively decreasing in diameter and defining a path of variable cross-section;
- a second cylindrical portion extending radially in said second direction from said frustoconical portion to a second axial end of said cap, said cap stamped from sheet metal.
Dependencies are inferred from the claim text.