| 主权项 |
1. A heat exchanger for exhaust gas cooling, the heat exchanger comprising:
a housing; at least one first flow duct for a first medium; at least one second flow duct for a second medium; and at least one bottom which is connected to the housing, wherein the bottom comprises:
a first plate comprising an outer peripheral end surface, an inner peripheral end surface, and a curved surface extending between the outer peripheral end surface and the inner peripheral end surface, the curved surface including an expansion element configured to compensate for a longitudinal expansion of the at least one first flow duct and an angular, region extending from the expansion element to the inner peripheral end surface, anda second plate comprising a bottom surface orifice lattice, a first surface extending in a plane perpendicular to an axial direction of the first flow duct, a second surface opposing the first surface and extending in a plane parallel to the first surface, and a peripheral end surface extending between the first surface and the second surface, wherein the first plate extends peripherally around the second plate, wherein the expansion element comprises a first embossing and a second embossing, the first embossing extending peripherally around the bottom surface orifice lattice, and the second embossing extending peripherally around the first embossing, and wherein the curved surface of the first plate includes a portion that (i) is located in the angular region, (ii) extends in a direction substantially perpendicular to the planes of the first and second surfaces of the second plate, and (iii) is attached to the peripheral end surface of the second plate. |
