A refrigeration cycle apparatus (100,101) comprising a refrigerant circuit through which refrigerant circulates, the refrigerant circuit including a compressor, a first flow path switching unit, a second flow path switching unit, a first heat exchanger, a second heat exchanger, and a third heat exchanger, the first heat exchanger having a first flow-in/out portion and a second flow-in/out portion to/from which the refrigerant flows in/out, the second heat exchanger having a third flow-in/out portion and a fourth flow-in/out portion to/from which the refrigerant flows in/out, the first flow path switching unit being configured to switch between a first state and a second state, in the first state, at least one of the first heat exchanger and the second heat exchanger being configured to serve as a condenser and the third heat exchanger being configured to serve as an evaporator, in the second state, at least one of the first heat exchanger and the second heat exchanger being configured to serve as an evaporator and the third heat exchanger being configured to serve as a condenser, the second flow path switching unit having a first port, a second port, a third port, a fourth port, a fifth port, and a sixth port through which the refrigerant flows in/out, the first port being connected to a discharge port of the compressor via the first flow path switching unit in the first state, and being connected to a suction port of the compressor via the first flow path switching unit in the second state, the second port being connected to the first flow-in/out portion, the third port being connected to the third flow-in/out portion, the fourth port being connected to the second flow-in/out portion, the fifth port being connected to the fourth flow-in/out portion, the sixth port being connected to the third heat exchanger, the second flow path switching unit being configured to switch between a third state and a fourth state, in the third state, the first port, the second port, the first heat exchanger, the fourth port, the third port, the second heat exchanger, the fifth port and the sixth port being successively connected in series, and in the fourth state, the sixth port, the fourth port, the first heat exchanger, the second port and the first port being successively connected in series, and the sixth port, the fifth port, the second heat exchanger, the third port and the first port being successively connected in series, the second flow path switching unit being configured as a single unit. the refrigerant circuit including a compressor, a first flow path switching unit, a second flow path switching unit, a first heat exchanger, a second heat exchanger, and a third heat exchanger, the first heat exchanger having a first flow-in/out portion and a second flow-in/out portion to/from which the refrigerant flows in/out, the second heat exchanger having a third flow-in/out portion and a fourth flow-in/out portion to/from which the refrigerant flows in/out, the first flow path switching unit being configured to switch between a first state and a second state, in the first state, at least one of the first heat exchanger and the second heat exchanger being configured to serve as a condenser and the third heat exchanger being configured to serve as an evaporator, in the second state, at least one of the first heat exchanger and the second heat exchanger being configured to serve as an evaporator and the third heat exchanger being configured to serve as a condenser, the second flow path switching unit having a first port, a second port, a third port, a fourth port, a fifth port, and a sixth port through which the refrigerant flows in/out, the first port being connected to a discharge port of the compressor via the first flow path switching unit in the first state, and being connected to a suction port of the compressor via the first flow path switching unit in the second state, the second port being connected to the first flow-in/out portion, the third port being connected to the third flow-in/out portion, the fourth port being connected to the second flow-in/out portion, the fifth port being connected to the fourth flow-in/out portion, the sixth port being connected to the third heat exchanger, the second flow path switching unit being configured to switch between a third state and a fourth state, in the third state, the first port, the second port, the first heat exchanger, the fourth port, the third port, the second heat exchanger, the fifth port and the sixth port being successively connected in series, and in the fourth state, the sixth port, the fourth port, the first heat exchanger, the second port and the first port being successively connected in series, and the sixth port, the fifth port, the second heat exchanger, the third port and the first port being successively connected in series, the second flow path switching unit being configured as a single unit.