| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fin tube heat exchanger large in a heat exchange amount per unit weight. <P>SOLUTION: This fin tube heat exchanger 10 includes fins 30 and heat-transfer tubes 20. The fins 30 include a plurality of through-holes 5a, 5b to which the heat-transfer tubes 20 are individually fitted. The through-holes 5a, 5b are formed at equal intervals along a step direction vertical to both the arrangement direction of the fins 30 and the flow direction of air A, and formed in a plurality of lines along a line direction in parallel to the flow direction. When it is defined that the outer diameter of the heat-transfer tube 20, the center-to-center distance in the step direction of the heat-transfer tubes 20, the center-to-center distance in the line direction of the heat-transfer tubes 20, and the fin pitch of the plurality of fins 30 are D, Dp, Lp and Fp, respectively, the heat exchanger 10 satisfies the following relationships: 5 mm≤D≤5.5 mm, 2.5≤Dp/D≤3.7, 3.1≤Lp/D≤3.7 and 0.25≤Fp/D≤0.28. <P>COPYRIGHT: (C)2013,JPO&INPIT |
