HEAT EXCHANGER

摘要

A heat exchanger has a clad thin sheet material, a clad thick sheet material that is disposed so as to define a passage between the clad thick sheet material and the clad thin sheet material, and that has a sheet thickness greater than that of the clad thin sheet material, and an inner fin held between the clad materials. The clad thick sheet material and the clad thin sheet material have Zn-containing brazing filler metal layers on their passage sides, respectively, and the post-brazing surface Zn amounts are set so as to satisfy specific conditions. Further, certain conditions concerning the compositions of each of the layers that constitute the clad materials, and the inner fin are set.