| 摘要 |
PURPOSE:To enable to mass-produce multi-tubular heat exchangers without deteriorating the pressure resistance of heat exchanger tubes, by fitting a porous metal body into a cylindrical casing, inserting heat exchanger tubes into holes formed in the metal body, and then soldering them together in a furnace. CONSTITUTION:A porous metal body 11 formed with many tube holes 10 is fitted into a cylindrical casing 9, and heat exchanger tubes 12 made of copper or a copper alloy are inserted into the holes 10 of the metal body 11. Then, end plates 14, 15 also formed with holes 13 are attached to both ends of the metal body 11, and a soldering material is applied on the end plate 14. In this state, the heat exchanger assembly is fixed together by heating it in a vacuum furnace. Since, by employing such a method, the tubes 12 are fixed securely to the metal body 11, they are reinforced by the metal body 11, so that substantial drop in the pressure resistance of the tubes is not caused. |
