| 摘要 |
FIELD: heating.SUBSTANCE: invention proposes a heat exchanger, in which in a gas supply tube and a liquid supply tube of a unit of connection tubes, connection parts, in which aluminium tubes (the first cooling agent tubes: cooling agent tubes made from aluminium or aluminium alloy) and copper tubes (the second cooling agent tubes: cooling agent tubes made from copper or copper alloy) respectively are connected to each other, located in down-going parts of aluminium tubes. The unit of connection tubes is covered with heat-insulating material. Corrosion protective treatment is applied to aluminium tubes covered with heat-insulating material.EFFECT: eliminating electrolytic corrosion of aluminium or aluminium alloy.4 cl, 8 dwg |
