| 摘要 |
PROBLEM TO BE SOLVED: To facilitate insertion of the tube end into a relevant header while enhancing the brazing performance by arranging first and second flat tubes closely each other on the upstream side and downstream side of air flow and bending both tubes on one end part thereof. SOLUTION: A combined heat exchanger comprises a large number of first and second flat tubes 1, 2 arranged closely and in parallel each other on the upstream side and downstream side of air flow in the direction orthogonal to the paper surface. The first tube 1 has the opposite ends inserted liquidtightly into the tube insertion hole of a first header 4 and the second tube 2 has the opposite ends inserted liquidtightly into the tube insertion hole of a second header 5. The first tube 1 is bent, at the opposite ends thereof, to recede from the second tube 2. The tubes 1, 2 are arranged commonly with a corrugated tin 3 which is provided, at each end thereof, with a cut 6 enlarging toward the header 4, 5. |
