| 摘要 |
PURPOSE:To increase the contact area between a heat transfer member and a heat transfer tube and to improve the heat exchange efficiency thereof by interposing an intermediate heat transfer member between the heat transfer member and the heat transfer tube. CONSTITUTION:Heat transfer tubes 3 are coupled in a spiral manner to the outer peripheral wall surface of an intermediate heat transfer member 7 using a solder 6 which is a brazing material. Since the wire of wire netting comes into contact with the intermediate heat transfer member 7, and heat transfer tubes 3 easily come into contact with the intermediate heat transfer member 7, the contact area between the heat transfer member 1 and heat transfer tubes 3 is increased and the heat transfer efficiency is improved.
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