A fuel cooler with lamellar inner structures for connecting to an
air-conditioning system of a vehicle includes an outer housing having
outer connections connected to an outer supply pipe and an outer
discharge pipe for a first fluid with the outer connections being
integrated into walls of the outer housing in a diagonally mismatched
arrangement. An inner conduit cell, surrounded by the outer housing, has
an inner supply pipe and an inner discharge pipe for a second fluid
passing through the inner conduit cell, which includes lamellas oriented
parallel to a direction of flow of the second fluid, with the first fluid
coming into contact with an outer contact surface of the inner conduit
cell prior to exiting the outer housing for creating a heat exchange
between, and without a mixing of, the two fluids, which are fuel and a
coolant.