| 摘要 |
PURPOSE:To obtain a heat transfer tube having a good heat exchanging efficiency by a method wherein the refrigerant and water flow path members of the heat transfer tube are provided with a plurality of louverlike outflow ports to form the flow paths of the refrigerant and the water. CONSTITUTION:The refrigerant flow path member 6, made of thin metallic plates and utilized both for a heat transfer surface, is inserted into an annular space 3, is connected thermally to the outer wall of the heat transfer tube 1 and is contacted substantially with the inner wall of an outer tube 2. The refrigerant flow path member 6 is provided with a flange 6a, contacted closely to the heat transfer tube 1, the refrigerant flow path wall 6b utilized both for the heat transfer surface and a plurality of louver-like outflow ports 8 provided on the refrigerant flow path wall 6b while the outflow ports 8 are formed by forming protuberances 8a, protruding from the refrigerant flow path wall 6b, and opening the one ends of the protuberances 8a. |
