| 摘要 |
The tube (10) has a narrow strip (11) whose end or edge (13) is conformed to form a rigid separating partition (12) after folding of the strip. The partition divides the tube into two channels (31, 32) for circulation of a heat transfer fluid e.g. glycol water. The partition has a curvilinear profile i.e. loop profile, and is closed on itself according to the profile. The profile has a loop portion (12b) terminated inside another loop portion (12a). The loop portions have a shape of an arc of circle. The loop portion (12b) is brazed on a plate (44) that forms beginning of the portion (12a).
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