Fin device, heat exchanger having the same and method for manufacturing a fin device

A heat exchanger for transferring heat-energy between two fluid streams, comprising

• a plurality of tubes for fluid arranged between opposite collector boxes, the collector boxes are each arranged transversely to a tube longitudinal direction, the tubes are spaced apart from one another in a width direction,
• wherein a first fluid path for a first fluid stream leads through the plurality of tubes and a second fluid path for a second fluid stream leads about the plurality of tubes, so that the plurality of tubes are configured to be flowed through by the first fluid stream and flowed about by the second fluid stream,
• further comprising at least one fin device, which is equipped for transferring heat-energy between the first fluid stream and the second fluid stream, wherein each fin device of the at least one fin device comprises a plurality of corrugated fins that are adjacent to each other and connected to each other, wherein the adjacent and connected corrugated fins are arranged to be lined up and behind one another and connected to each other in a depth direction that is transverse to the tube longitudinal direction and the width direction,
• wherein each of the plurality of corrugated fins comprise fin walls that are separated by fin folds,
• wherein the fin folds of adjacent corrugated fins are fixed to one another in that corrugated fins are each connected to one another by fin folds that are adjacent in the depth direction being directly connected to one another;
• wherein the at least one fin device is arranged in the second fluid path and can be flowed about by the second fluid stream in the depth direction,
• wherein the at least one fin device is connected to at least one tube or with a main direction of the at least one fin device oriented parallel to the tube longitudinal direction, wherein the at least one fin device is positioned between two tubes of the plurality of tubes that are adjacent in the width direction.