Indoor unit of air conditioner

An indoor unit of an air conditioner, comprising:

• a heat exchanger that includes a first heat exchange part and a second heat exchange part, wherein
• the second heat exchange part has a high wind velocity region where a wind velocity of air passing through the second heat exchange part is relatively high and a low wind velocity region where the wind velocity of air is relatively low, and the high wind velocity region is located above the low wind velocity region in a direction of gravity,
• at least one first heat transfer tube is disposed in the high wind velocity region, and at least one second heat transfer tube is disposed in the low wind velocity region,
• a first header is connected to each of the first heat transfer tube and the second heat transfer tube,
• the first header has a first internal space to which the first heat transfer tube and the second heat transfer tube are commonly connected,
• when using the heat exchanger as a condenser, a gas-liquid two-phase refrigerant that has flowed out from the first heat exchange part flows into the first internal space of the first header, and then the refrigerant flows into each of the first heat transfer tube and the second heat transfer tube from the first internal space,
• the first header is provided with an inlet into which the gas-liquid two-phase refrigerant that has flowed out from the first heat exchange part flows, and
• the inlet is disposed in the low wind velocity region.