Heat exchanger and refrigeration cycle device

A heat exchanger comprising:

• a fin having a first through hole and a second through hole disposed below the first through hole, and including a first end portion and a second end portion in a horizontal direction;
• a first heat transfer tube inserted into the first through hole, a cross-section of the first heat transfer tube parallel to the fin having a flat shape such that a cross-section in a major axis direction is larger than that in a minor axis direction;
• and
• a second heat transfer tube inserted into the second through hole, a cross-section of the second heat transfer tube parallel to the fin having a flat shape such that a cross-section in the major axis direction is larger than that in the minor axis direction,
• wherein,
• when a virtual straight line passing through an end portion in the major axis direction of the first heat transfer tube on a first end portion side and an end portion in the major axis direction of the second heat transfer tube on the first end portion side is a first virtual straight line,
• a virtual straight line passing through an end portion in the major axis direction of the first heat transfer tube on a second end portion side and an end portion in the major axis direction of the second heat transfer tube on the second end portion side is a second virtual straight line,
• a region between the first end portion and the first virtual straight line on a surface of the fin is a first drainage region,
• a region between the second end portion and the second virtual straight line on the surface of the fin is a second drainage region, and
• a region on the surface of the fin enclosed by the first heat transfer tube, the second heat transfer tube, the first virtual straight line and the second virtual straight line is a water introducing region,
• a first groove inclined to descend toward the first drainage region and a second groove disposed closer to the second drainage region than the first groove and inclined to descend toward the second drainage region are formed in the water introducing region,
• wherein,
• when one of angles formed on the surface of the fin between a line perpendicular to an arrangement direction of the first heat transfer tube and the second heat transfer tube, and the first groove, is a first angle of inclination, the first angle of inclination being an acute angle, and
• one of angles formed on the surface of the fin between the line perpendicular to the arrangement direction of the first heat transfer tube and the second heat transfer tube, and the second groove, is a second angle of inclination, the second angle of inclination being an acute angle,
• the heat exchanger is configured to receive air from the first end portion, and
• the second angle of inclination is larger than the first angle of inclination.