Device for exchanging heat comprising a plate stack and method for producing said device

A device for exchanging heat, the device comprising:

• a plate stack having at least a first plate, a second plate and a third plate, said at least three plates being stacked above one another and having recesses formed therein and embodied to run through an entire thickness of a respective plate and disposed in a plane of said respective plate in a shape of a regular pattern, said first and second plates, as well as said second and third plates, adjacent to each other in each case, being stacked above one another such that adjacent plates each embody a cooling channel accessible for a fluid along a direction in a plate plane, said recesses in said adjacent plates disposed partly but not completely overlapping, and said cooling channel of said first and second plates being completely spatially separated from said cooling channel of said second and third plates.

A method for producing a device, which comprises the steps of:

• stacking at least three plates above one another to form a plate stack such that at least a first cooling channel is formed running right through a first and a second plate of the plate stack and at least one second cooling channel is formed, completely separated spatially from the first cooling channel, passing right through the second and a third plate of the plate stack, the cooling channels being formed in at least one direction in a plate plane by recesses formed in the at least three plates and the recesses of adjacent plates being disposed to partly, but not completely, overlap.