Patent ID: 8291724

Claim:
A heat exchanger for heat exchange between the air and a heat exchange medium, the heat exchanger comprising: multiple heat transfer tubes arranged in parallel to each other as flow paths of the heat exchange medium; and multiple corrugated fin members configured to have wave forms and provide an air inlet for inflow of the air, an air outlet for outflow of the air, and an air flow path connecting the air inlet with the air outlet and making heat exchange with the multiple heat transfer tubes, wherein: the multiple fin members are arranged to have a preset acute angle formed by each wave form and a first air flow line in at least the air inlet, and the multiple fin members have wave forms such that: a top-connecting line that connects tops of each wave form is bent multiple times between an immediate adjacent set of the multiple heat transfer tubes where a line connecting the immediate adjacent heat transfer tubes is perpendicular to a direction of the air inlet, and multiple curves are consistent with a second airflow line between the adjacent set of the multiple heat transfer tubes, the second airflow line existing between the fin members at the air inlet side, wherein each curve interconnects one of bent points of the top-connecting line of each wave form and one of bent points of a bottom-connecting line that interconnects bottoms of a wave form where the one of bent points of the bottom-connecting line is immediate adjacent to the one of bent points of the top-connecting line.