| 摘要 |
A heat exchanger, wherein when viewing a louver (24) from the air current direction (X1), the louver tip width (WDtp) becomes shorter the higher the louver height. Thus, a radiator can be equipped, for example, with fins for which unnecessary shape deformation from roller forming has been suppressed, and therefore excellent heat exchange performance can be obtained. In addition, the fin width (WDfn) is no more than 14 mm. Additionally, the air current-end louver length (LLN) for a first upstream-end louver (241), a first downstream-end louver (243), a second upstream-end louver (261), and a second downstream-end louver (263) is at least "5/8×LP" when LP is the louver pitch. As a result, it is considered to be more difficult for the air to stagnate. Thus, the total air volume passing between the louvers (24, 26) increases, and it is possible to reduce the fin width (WDfn) in the radiator to 14 mm or less while obtaining excellent heat exchange performance. |
