Patent ID: 6973796

Claim:
A multi-air conditioner comprising: an outdoor unit installed at an outdoor location, and having a compressor, an outdoor heat exchanger, and an outdoor fan for ventilating the outdoor heat exchanger; a plurality of indoor units installed at respective indoor areas, each indoor unit having an electronic expansion valve and an indoor heat exchanger; a distributor provided between the outdoor unit and the plurality of indoor units, for selectively guiding a refrigerant from the outdoor unit to the plurality of indoor units according to an operation condition; a four-way valve provided on an outlet side of the compressor, for selectively switching a flow direction of the refrigerant flowing through the outdoor heat exchanger; a selective expansion unit provided at a side of the outdoor heat exchanger, for selectively expanding the refrigerant according to a flow direction of the refrigerant; a gas-liquid separator provided in the outdoor unit, for separating a vapor-phase refrigerant and a liquid-phase refrigerant from the refrigerant flowing out of the outdoor heat exchanger; and a connection tube part having a first connection tube for connecting the four-way valve with the distributor, a second connection tube for connecting an upper portion of the gas-liquid separator with the distributor to guide the vapor-phase refrigerant, and a third connection tube for connecting a lower portion of the gas-liquid separator with the distributor to guide the liquid-phase refrigerant.