<p>An air-conditioning device equipped with: a gas-liquid separator that separates refrigerant flowing from multiple indoor units into a liquid and a gas; liquid-side piping through which the liquid refrigerant separated by the gas-liquid separator flows out to a heat-source-side heat exchanger via a flow path switching device; gas-side piping through which the gas refrigerant separated by the gas-liquid separator flows out to the suction side of a compressor; a flow volume adjuster that adjusts the flow volume of the refrigerant flowing in the gas-side piping; and a flow volume control device that controls the operation of the flow volume adjuster in accordance with the state of the refrigerant flowing in an outdoor unit.</p>
