An air conditioning apparatus comprising: a refrigerant circuit in which a compressor, a channel switching unit, an indoor heat exchanger, a first expansion valve, a liquid pipe, a second expansion valve, and an outdoor heat exchanger are connected in series; and a control unit configured to perform switching control of the channel switching unit and to perform degree-of-opening control of the first expansion valve and the second expansion valve, wherein the control unit switches the channel switching unit such that a refrigerant flows through in the order of the indoor heat exchanger, the first expansion valve, the liquid pipe, the second expansion valve, and the outdoor heat exchanger at the time of a heating operation, characterised in that the control unit includes a degree-of-dryness calculating unit configured to calculate a degree of dryness of the refrigerant flowing into the outdoor heat exchanger at the time of the heating operation, performs, at the time of the heating operation, when the degree of dryness is less than or equal to a threshold that is determined in advance, a normal mode of controlling the first expansion valve such that the refrigerant flowing inside the liquid pipe is in a gas-liquid two phase state and controlling the second expansion valve such that the degree of opening of the second expansion valve is equal to a predetermined degree of opening, and performs an inhibition mode of inhibiting, when the degree of dryness exceeds the threshold, control that is performed in the direction of decreasing the degree of opening of the first expansion valve. a refrigerant circuit in which a compressor, a channel switching unit, an indoor heat exchanger, a first expansion valve, a liquid pipe, a second expansion valve, and an outdoor heat exchanger are connected in series; and a control unit configured to perform switching control of the channel switching unit and to perform degree-of-opening control of the first expansion valve and the second expansion valve, wherein the control unit switches the channel switching unit such that a refrigerant flows through in the order of the indoor heat exchanger, the first expansion valve, the liquid pipe, the second expansion valve, and the outdoor heat exchanger at the time of a heating operation, characterised in that the control unit includes a degree-of-dryness calculating unit configured to calculate a degree of dryness of the refrigerant flowing into the outdoor heat exchanger at the time of the heating operation, performs, at the time of the heating operation, when the degree of dryness is less than or equal to a threshold that is determined in advance, a normal mode of controlling the first expansion valve such that the refrigerant flowing inside the liquid pipe is in a gas-liquid two phase state and controlling the second expansion valve such that the degree of opening of the second expansion valve is equal to a predetermined degree of opening, and performs an inhibition mode of inhibiting, when the degree of dryness exceeds the threshold, control that is performed in the direction of decreasing the degree of opening of the first expansion valve. switches the channel switching unit such that a refrigerant flows through in the order of the indoor heat exchanger, the first expansion valve, the liquid pipe, the second expansion valve, and the outdoor heat exchanger at the time of a heating operation, characterised in that the control unit includes a degree-of-dryness calculating unit configured to calculate a degree of dryness of the refrigerant flowing into the outdoor heat exchanger at the time of the heating operation, performs, at the time of the heating operation, when the degree of dryness is less than or equal to a threshold that is determined in advance, a normal mode of controlling the first expansion valve such that the refrigerant flowing inside the liquid pipe is in a gas-liquid two phase state and controlling the second expansion valve such that the degree of opening of the second expansion valve is equal to a predetermined degree of opening, and performs an inhibition mode of inhibiting, when the degree of dryness exceeds the threshold, control that is performed in the direction of decreasing the degree of opening of the first expansion valve.