Heat exchanger and air-conditioning apparatus

A heat exchanger comprising:

• a first header that extends in a horizontal direction and into which hot-gas refrigerant flows during a defrosting operation;
• a plurality of first heat-transfer tubes that extend in a vertical direction, that are provided to the first header, that are spaced from each other in a horizontal direction, and through which the hot-gas refrigerant flowing into the first header flows;
• a second header provided parallel to the first header;
• a plurality of second heat-transfer tubes that extend in a vertical direction, that are provided to the second header, that are spaced from each other in a horizontal direction, and through which refrigerant flowing into the first header flows;
• and
• a corrugated fin placed between the plurality of first heat-transfer tubes and between the plurality of second heat-transfer tubes,
• the corrugated fin having an inter-header region between the first header and the second header,
• in the inter-header region, a first drain slit being formed through which meltwater is drained,
• the corrugated fin including a first pair of louvers and a second set of louvers,
• the first pair of louvers is formed on a first side of the first drain slit and are configured to angle downward toward the first drain slit,
• the second pair of louvers is formed on a second side of the first drain slit opposite the first side and are configured to angle downward toward the first drain slit, and
• virtual auxiliary lines drawn to lines extending along surfaces of the pair of louvers intersecting each other on a lower surface side of the corrugated fin.

A heat exchanger comprising:

• a first header that extends in a horizontal direction and into which hot-gas refrigerant flows during a defrosting operation;
• a plurality of first heat-transfer tubes that extend in a vertical direction, that are provided to the first header, that are spaced from each other in a horizontal direction, and through which the hot-gas refrigerant flowing into the first header flows;
• a second header provided parallel to the first header;
• a plurality of second heat-transfer tubes that extend in a vertical direction, that are provided to the second header, that are spaced from each other in a horizontal direction, and through which refrigerant flowing into the first header flows;
• and
• a corrugated fin placed between the plurality of first heat-transfer tubes and between the plurality of second heat-transfer tubes,
• the corrugated fin having an inter-header region between the first header and the second header,
• in the inter-header region, a first drain slit being formed through which meltwater is drained,
• the heat exchanger comprising a positioning element that is provided between the first header and the second header and that keeps a distance between the first header and the second header.