Outdoor heat exchanger and air conditioner

An outdoor heat exchanger comprising:

• a plurality of fins that are disposed at intervals;
• a blower mechanism that blows air into gaps between the fins;
• a plurality of heat transfer pipes which are arranged side by side in a vertical direction that intersects a direction in which the air flows, and through which a refrigerant that exchanges heat with the air via the plurality of fins flows;
• a first flow divider connected to the plurality of heat transfer pipes;
• and
• a gas header to which the plurality of heat transfer pipes are connected in parallel,
• wherein
• the plurality of heat transfer pipes is connected between the first flow divider and the gas header,
• the plurality of heat transfer pipes includes a lowermost heat transfer pipe located on a lowermost side and an upper heat transfer pipe located above the lowermost heat transfer pipe,
• the upper heat transfer pipe includes a merging path connected to the first flow divider, a second flow divider provided at an end portion of the merging path, and two branch paths branched from the second flow divider,
• the two branch paths are connected to the gas header,
• the lowermost heat transfer pipe is connected to the gas header by a single path, and
• a flow resistance of the refrigerant in a liquid phase inside the upper heat transfer pipe is smaller than a flow resistance of the refrigerant in a liquid phase inside the lowermost heat transfer pipe.