Abstract: A corrugated fin of a heat exchanger is formed such that fin sections are joined together one after another in a tube axial direction of a plurality of flat heat-transfer tubes. Louvers in the fin sections of the corrugated fin are divided into a first louver group formed further upstream in a direction of flow of air than a drain slit in the corrugated fin and a second louver group formed further downstream in the direction of flow of air than the drain slit. Plate portions of the first louver group and plate portions of the second louver group are inclined to a flat-plate portion in the fin sections and inclined in respective directions that are opposite to each other. The drain slit includes a plurality of drain slits provided in a plurality of respective rows between the first louver group and the second louver group.

Abstract: A heat exchanger includes a plurality of flat heat-transfer tubes and a corrugated fin placed between the plurality of flat heat-transfer tubes. Louvers in fin sections of the corrugated fin are divided into a first louver group formed further upstream in a direction of flow of air than a drain slit in the corrugated fin and a second louver group formed further downstream in the direction of flow of air than the drain slit. Plate portions of the first louver group and plate portions of the second louver group are inclined to a flat-plate portion in the fin sections and inclined in respective directions that are opposite to each other. The drain slit includes a plurality of drain slits formed between the first louver group and the second louver group at an interval in the direction of flow of air.

Abstract: An air-conditioning apparatus includes a compressor and an outdoor heat exchanger that operates as an evaporator. A first heat exchange unit of the outdoor heat exchanger includes: first heat transfer tubes extending in an upward/downward direction, and arranged apart from each other in a lateral direction; a first junction pipe extending in the lateral direction, and connected to the lower ends of the first heat transfer tubes; an outflow pipe connected to the first junction pipe at or below a center position of the first junction pipe in the upward/downward direction; second heat transfer tubes extending in the upward/downward direction, and arranged apart from each other in the lateral direction; a first distribution pipe extending in the lateral direction, and connected to the lower ends of the second heat transfer tubes, and a first connection part connecting upper ends of the first heat transfer tubes and upper ends of the second heat transfer tubes.

Abstract: A refrigerant distributor includes an outer pipe, an inner pipe, and a structural part. The refrigerant outflow hole is provided such that an angle ? between a lower end of the inner pipe on a vertical line passing through a center of the inner pipe and a position of presence of the refrigerant outflow hole as seen from the center of the inner pipe falls within a range of 10 degrees???80 degrees. The refrigerant outflow hole comprises a sole refrigerant outflow hole provided in a vertical cross-section of the inner pipe at a position where the refrigerant outflow hole is provided.

Abstract: An air-conditioning apparatus includes a compressor and an outdoor heat exchanger that operates as an evaporator. A first heat exchange unit of the outdoor heat exchanger includes: first heat transfer tubes extending in an upward/downward direction, and arranged apart from each other in a lateral direction; a first junction pipe extending in the lateral direction, and connected to the lower ends of the first heat transfer tubes; an outflow pipe connected to the first junction pipe at or below a center position of the first junction pipe in the upward/downward direction; second heat transfer tubes extending in the upward/downward direction, and arranged apart from each other in the lateral direction; a first distribution pipe extending in the lateral direction, and connected to the lower ends of the second heat transfer tubes, and a first connection part connecting upper ends of the first heat transfer tubes and upper ends of the second heat transfer tubes.