| 摘要 |
PROBLEM TO BE SOLVED: To easily and accurately hold the pitch of fins in a fin-and-tube type heat exchanger comprising a number of sheet-like fins laminated in parallel at a fixed pitch and flat heat transfer tubes inserted substantially at right angles to the fins at a predetermined pitch and enhance falling property of condensed water. SOLUTION: The flat heat transfer tubes 4 are inclined, and cut-up portions opened to the main flow direction of gas with a height equal to the fixed pitch of fins 201 and 20b alternately laminated are provided in an area between heat transfer tubes 4 adjacent in the stage direction of the fins 201a and 201b so as to be located in different positions between the adjacent fins 201 and 201b. Accordingly, the cut-up portions 220a and 220b can easily and accurately hold the fixed pitch of the fins 201a and 201b alternately laminated without being fitted to the fin 201a or fin 201b, and excellent falling property of condensed water adhered to the surface of fins in vaporization can be also ensured. COPYRIGHT: (C)2007,JPO&INPIT
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