Tube having multi-channel tube and branch tubes, connection structure thereof and connection method therefore

摘要

A tube having a multi-channel tube and branch tubes, a connection structure thereof and a connection method therefor are disclosed. The tube is provided with: a multi-channel tube including a partition wall to partition an interior of the multi-channel tube into plural channels and an expanded end portion ; branch tubes inserted into the expanded end portion and respectively communicating with the channels; and clearances for being filled with brazing metal, which are respectively kept between the multi-channel tube and each of the branch tubes.