Heat exchanger

摘要

A heat exchanger comprising a heat exchange core ( 1 ) including a plurality of tubes ( 2 ) flowing a medium for heat exchange and a pair of tanks ( 4 ) to which ends of said tubes are connected, each tube formed by shaping a plate member ( 200 ) not clad with a row laminated brazing material and having a sacrifice layer ( 210 ) on an outer surface thereof and a plurality of recessed portions ( 203 ) formed on an outer surface of said sacrifice layer and filled with a brazing material (R).