| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger capable of restricting the defect of increased draft resistance due to dew condensation on fins or frosting on fins.SOLUTION: A heat exchanger comprises: a plurality of plate fins 10 extending in vertical direction, a pair of fins 10 adjacent to each other being continuously disposed in a horizontal direction in a parallel state between two faces thereof; heat transfer tubes 40A which are closely inserted into tube holes 10B provided in each of the plurality of fins 10 and including coolant circulating through the inside; and a plurality of grooves 12 extending along surfaces of the fins 10 downward from the above, the plurality of grooves 12 being formed at regular intervals in an arrangement direction orthogonal to an extension direction of the grooves 12, the width of the groove 12 ranging from 5 μm to 200 μm while the distance between edges of the grooves 12 adjacent to each other ranging from 5 μm to twice the width of the groove 12. |
