Heat exchangers, in particular oil coolers for motor vehicles

摘要

Heat exchanger, in particular oil cooler (1) for motor vehicles, with stacked flat tubes (2, 3, 4), the pipe ends with openings (8) for the entry and exit of the flat tubes (2, 3, 4) in the longitudinal direction flowing through fluid, in particular an oil, wherein the openings (8) of adjacent flat tubes (2, 3, 4) to form flow channels are in fluid communication with each other and wherein between the flat tubes (2, 3, 4) leave gaps for the passage of a medium, in particular a cooling medium wherein the flat tubes are formed as extruded multi-chamber tubes (2, 3, 4, 16), characterized in that the multi-chamber tubes (2, 3, 4, 11) have a multiplicity of chambers (2a, 21) divided by webs (2b) and that the openings (8) have a dimension D transverse to the longitudinal direction of the flat tubes, which corresponds to the distance a of the two outermost webs (2b).