| 摘要 |
PROBLEM TO BE SOLVED: To provide a fin tube type heat exchanger excellent in frost formation resisting performance with a large heat exchange and a heat pump device using it. SOLUTION: This fin tube type heat exchanger comprises a number of fins arranged substantially in parallel to each other with a space so that a fluid A flows in the space, and a number of heat exchange tubes inserted substantially vertically to the fins, in the inner part of which a fluid B flows. The tube outer diameter D of the heat exchange tube is set to 1 mm≤D<5 mm, the tube line pitch L1 in the flowing direction of the fluid A of the heat exchange tube is 2.5D<L1≤3.4D, and the tube stage pitch L2 vertical to the flowing direction of the fluid A is 3.0D<L2≤3.9D, whereby the fin tube type heat exchanger and the heat pump device can have excellent frost formation resisting performance. COPYRIGHT: (C)2005,JPO&NCIPI
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