| 摘要 |
PURPOSE:To manufacture a heat exchanging tube with inner fins as well as excellent heat exchanging performance by a method wherein inner fins and upper and lower walls are brought into close contact with one another while holding the bottoms of embedded recessions between the ends of reinforcement projections and the lower wall. CONSTITUTION:A heat exchanging tube 6 with inner fins 5 is manufactured by bringing the inner fins 5 into close contact with upper and lower walls 2, 3 while holding the bottoms 8a of recessions 8 of inner fins 5 between the ends of reinforcement projections 7 and the lower wall. The heat exchanging tube 6 with inner fins 5 so far manufactured may be provided with excellent heat exchanging performance since the tube walls 2, 3 are brought into close contact with the inner fins 5 assuring no collapse of the tube walls 2, 3 and the inner fins 5 at all. |
