Even if in the simultaneous cooling and heating multi-type air conditioner when the height difference construction, by such refrigerant flows into the indoor unit which performs heating operation, thereby improving the heating capacity.
At least one outdoor unit, a first indoor unit and the second indoor unit are connected by a refrigerant pipe, the outdoor unit is provided with a compressor and an outdoor heat exchanger, a first indoor unit, the first comprising a first indoor heat exchanger, a second indoor unit comprises the air conditioner having a second indoor heat exchanger, the first indoor unit performs the heating operation, the second indoor unit cooling If performing the operation, and, when the outdoor heat exchanger acts as a condenser, refrigerant from said compressor while flowing through the outdoor heat exchanger, so that flowing through the first indoor heat exchanger the refrigerant pipe is formed by narrowing the opening degree of the deployed expansion valve to the refrigerant outlet side of the outdoor heat exchanger, the first chamber inlet side refrigerant pressure of the first indoor heat exchanger It is controlled to be higher than the refrigerant pressure on the outlet side of the heat exchanger.