| 摘要 |
The present invention relates to a process for producing a flat heat exchange tube (B) having parallel fluid passages (6) in its interior and comprising an upper wall (1), a lower wall (2), right and left side walls (34) interconnecting right and left side edges of the upper and lower walls and a plurality of reinforcing walls (5, 14) connected between the upper and lower walls, extending longitudinally of the tube and spaced apart from one another, by brazing a first tube component member (31) of aluminum and a second tube component member (32) of aluminum into an integral assembly, the first component member including a lower wall (2) forming portion and a plurality of reinforcing wall (5, 14) forming portions integral with and extending upward from the lower wall forming portion, the second component member including an upper wall (1) forming portion comprising a brazing sheet having a brazing material layer over at least the lower of upper and lower surfaces thereof. The process comprising roughing the lower surface of the upper wall (1) forming portion of the second component member to mar an oxide film produced over the surface in advance, tacking the two component members together (31, 32), and thereafter brazing the two component members. <IMAGE> |
