| 摘要 |
The objective of the present invention is, with respect to a header plateless heat exchanger having as a component a flat tube formed by joining a pair of grooved plates together, to improve air-tightness and liquid-tightness between the portion of the flat tube where the plates are joined together and a header tank. A flat tube (5) is formed by folding tab parts (9) extending from side walls (1a) of a first plate (1) back outwards to lie over the outer surfaces of those side walls (1a) of the first plate (1), and placing seating portions (2c) of side walls (2a) of a second plate (2) on the upper end surfaces (9a) of the tab parts (9),after which a header tank (8) is fitted on each longitudinal end of the flat tube (5). |
