Patent ID: 8881796

Claim:
A heat exchanger for an exchange of heat between a first fluid and a second fluid, the heat exchanger comprising: a block comprising: a plurality of flow ducts configured to be traversed by the first fluid, the plurality of flow ducts being formed as flat tubes, and a housing that holds the flow ducts and is configured to be traversed by the second fluid; a base connected to the block, the base comprising: at least one inner base part comprising a plurality of substantially rectangular passage openings for the plurality of flow ducts, and an outer base part attached to the at least one inner base part, wherein the inner base part includes an edge region, and an elevated portion having a planar upper surface that is elevated above the edge region, the plurality of passage openings extending through the elevated portion from the planar upper surface to a lower surface of the elevated portion, wherein the outer base part includes a first limb and a second limb, wherein the first limb includes a first limb contact surface that contacts an edge region contact surface of the edge region, wherein the first limb contact surface extends in a plane parallel to a plane of the edge region contact surface, and the second limb extends transversely with respect to the plane of the edge region contact surface, wherein an entirety of an inner periphery of the second limb runs along an outer periphery of the elevated portion, and wherein an outer periphery of the inner base part is surrounded by the outer base part; and at least one tank cover connected to the base.