Heat exchanger

The invention relates to a heat exchanger (1, 21, 41, 81) with a first flow channel (15, 39, 55, 100) through which a first fluid can flow, and with a second flow channel (14, 38, 54, 99) through which a second fluid can flow, wherein the first flow channel (15, 39, 55, 100) has a first partial section (12, 36, 52, 97), a second partial section (13, 37, 53, 98) and a deflection area, wherein the first partial section is in fluid communication with the second partial section via the deflection area (7, 27, 47, 87) and the first partial section (12, 36, 52, 97), the second partial section (13, 37, 53, 98) and the deflection area (7, 27, 47, 87) can be flowed around by the second fluid, wherein the first partial section (12, 36, 52, 97) and/or the second partial section (13, 37, 53, 98) of the first flow channel (15, 39, 55, 100) is in each case formed by a plurality of tubes (8, 9, 28, 29, 48, 49, 88, 89).