Patent ID: 6952933

Claim:
A multi-type air conditioner comprising: an outdoor unit including a compressor, an outdoor heat exchanger, a flow path control valve that controls a flow path of a refrigerant from the compressor, and an outdoor unit piping system; a plurality of indoor units each having an indoor expansion device, an indoor heat exchanger, and an indoor piping system; a distributor that selectively distributes the refrigerant from the outdoor unit to the plurality of indoor units and from the plurality of indoor units to the outdoor unit according to respective operation modes; a noise preventor provided on respective pipelines connected to each of the indoor units and comprising a respective first valve connected to a respective open/close valve, the noise preventor being configured to cut off refrigerant flow to inoperative indoor units when the air conditioner is in operation, thereby preventing an occurrence of refrigerant flow noise at the inoperative indoor units; and a bypass for the refrigerant in the pipeline connected to the indoor expansion device to bypass the inoperative indoor unit.