Heat exchanger for cooling a switch cabinet and corresponding cooling arrangement

A cooling arrangement including a switch cabinet and a cooling apparatus which has a first and a second heat exchanger for cooling a switch cabinet, each heat exchanger having a first line system for a first coolant and at least one second line system, separated fluidically from the first line system, for a second coolant, the first and the second line system being coupled thermally to one another, wherein the heat exchanger comprises a plurality of lamellae, adjacent lamellae forming between them an air flow duct through the heat exchanger, the air flow duct comprising an air flow direction through the heat exchanger, and the first and the second line system being disposed one behind the other in the air flow direction and being coupled thermally to one another via the plurality of lamellae, wherein:

• the first heat exchanger is disposed in a first air passage with a first air inlet and with a first air outlet, which are open to an area surrounding the switch cabinet, and the second heat exchanger is disposed in a second air passage with a second air inlet and with a second air outlet, which are open to an interior of the switch cabinet, the first line system of the first heat exchanger forming with the first line system of the second heat exchanger a first closed coolant circuit, and the second line system of the first heat exchanger forming with the second line system of the second heat exchanger a second closed coolant circuit.