| 摘要 |
PURPOSE:To easily manufacture a tube element of high quality by pressworking a couple of thermal conductivity type tabular members to form ribs, roughing the surface thereof and then, carrying out brazing thereon by using noncorrosive flux at the time of manufacturing the tube element for a laminated heat exchanger. CONSTITUTION:Plural-layer tabular tube elements 11 and radiating fins 12 are laminated alternately to manufacture the laminated heat exchanger. In this case, a couple of Al plates 21 are press-formed and then brazed each other to form the tube element 11. The ribs 26 for improving pressure withstanding strength are formed on the whole surfaces of the two Al plates 21 and then, the ribs 26 and the peripheral part 25 are subjected to surface roughing by abrasive paper and then, applied with the noncorrosive flux and brazed. The flux is applied uniformly by roughing a brazing part and the tube element is easily manufactured without causing defective brazing. |
