Abstract: An outdoor unit has a compressor and an outdoor heat exchanger. Each of a plurality of indoor units has an indoor heat exchanger. The outdoor unit is connected in parallel with the plurality of indoor units to form a multi-type air conditioner system having a plurality of refrigeration cycles. A plurality of gaseous flow adjustment valves are provided to the gaseous sides of the indoor units, respectively. A plurality of liquid expansion valves are provided to the liquid sides of the indoor unit, respectively. A refrigerant super-heat degree detector detects a refrigerant super-heat degree of the outdoor heat exchanger or the indoor heat exchangers.

Abstract: Electric expansion valves are provided midway along liquid-side pipes connected to indoor units. Electric flow control valves are provided midway along gas-side pipes connected to the indoor units. The indoor units detect air-conditioning loads, and a capability of a compressor is controlled in accordance with the sum of the air-conditioning loads. At the same time, the opening degrees of the flow control valves are controlled in accordance with the individual air-conditioning loads of the indoor units. In the heating operation mode, a high-pressure-side pressure of a refrigeration cycle is detected. When the high-pressure-side pressure becomes a preset value or more, an expansion valve and a flow control valve corresponding to an indoor unit whose operation is stopped are opened to predetermined opening degrees.