Abstract: An air conditioner is provided that may include an indoor device and an outdoor device. The outdoor device may include at least one compressor, an outdoor heat exchanger, a supercooling device that supercools a refrigerant, a first refrigerant pipe that allows the supercooling device to communicate with a suction side of the compressor, a first valve disposed in or on the first refrigerant pipe, a second refrigerant pipe that connects the compressor to the first refrigerant pipe, and at least one second valve disposed in or on the second refrigerant pipe. In a first refrigerant flow mode, a refrigerant flowing into the supercooling device may be introduced into the at least one compressor through the second refrigerant pipe. In a second refrigerant flow mode, a refrigerant compressed by the at least one compressor may be discharged into the second refrigerant pipe.

Abstract: An air conditioner may include a plurality of indoor units and a plurality of outdoor units connected to the plurality of indoor units. Each of the plurality of outdoor units may include a plurality of outdoor heat exchangers. Each of the outdoor heat exchangers may include a plurality of heat exchanger parts. When a defrosting operation condition is satisfied during a heating operation, indicating that a defrosting operation should be performed the plurality of heat exchanger parts of the plurality of outdoor heat exchangers may successively perform the defrosting operation.

Abstract: A multi type air conditioner may include an outdoor unit, a distributor connected to the outdoor unit, and a plurality of indoor units connected to the distributor. The distributor may include a plurality of pipe ports. Two or more of the indoor units may be connected to one or more of the pipe ports to form an indoor unit group. An operation mode of the two or more indoor units forming the indoor unit group may operate in a reference mode that corresponds to an operation mode of a main indoor unit or an appropriate pipe port.