Patent ID: 8397530

Claim:
A heat exchanger for exchanging heat with air flowing through the heat exchanger, the heat exchanger comprising: lower fins; and upper fins being inclined in the direction of the airflow about an inclination reference point at an angle between the longitudinal axis of the upper fins and the vertical direction, the range of the angle being equal to or greater than the range of an angle formed between the longitudinal axis of the lower fins and the vertical direction, the upper fins being disposed adjacent to top ends of the lower fins, the upper fins having curved portions being curved on portions bordering the top ends of the lower fins on a downstream side in the airflow direction, each curved portion contacting a respective lower fin at a location downstream of a location at which the curved portion does not contact the lower fin such that a space is formed between the curved portion and the lower fin, the space being downstream of the inclination reference point and upstream of the location at which the curved portion contacts the lower fin.