| 摘要 |
PROBLEM TO BE SOLVED: To provide a parallel flow type heat exchanger of high heating operation efficiency by uniforming frost formed at a fin part even in the case of utilizing the parallel flow type heat exchanger for an outdoor unit used as an evaporator in heating operation. SOLUTION: This heat exchanger has a plurality of flat tubes 1 arranged parallel to allow a refrigerant to flow inside, and a plurality of plate fins 2 arranged at the same pitch and brought into close contact almost orthogonally to the flat tubes, wherein the flat tubes pass through the plate fins. A plurality of louvers 6 are formed being cut and raised at the plate fin, and arranged so that the louver length of the fin 2 is gradually larger downstream from upstream of a fluid. COPYRIGHT: (C)2005,JPO&NCIPI
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