A refrigeration cycle device comprising: a channel switching device including an inflow port for inflow of refrigerant, an outflow port for outflow of the refrigerant, first and second inflow/outflow ports (2c, 2d) for inflow or outflow of the refrigerant, a first communication channel that connects between the inflow port and the first inflow/outflow port, a second communication channel that connects between the first inflow/outflow port and the outflow port, a third communication channel that connects between the outflow port and the second inflow/outflow port, a fourth communication channel that connects between the second inflow/outflow port and the inflow port, and first to fourth two-way valves (SV1a, SV1b to SV4a, SV4b) that are disposed in the first to fourth communication channels (21 to 24) respectively and open/close the first to fourth communication channels (21 to 24) respectively; a compressor disposed between the outflow port and the inflow port of the channel switching device; a use-side heat exchanger connected to the first inflow/outflow port of the channel switching device; a heat-source-side heat exchanger connected to the second inflow/outflow port of the channel switching device; an expansion valve disposed between the use-side heat exchanger and the heat-source-side heat exchanger; a first annular channel that starts from the outflow port of the channel switching device through the compressor back to the inflow port of the channel switching device; and a second annular channel that starts from the first inflow/outflow port of the channel switching device through the use-side heat exchanger, the expansion valve, and the heat-source-side heat exchanger in order, back to the second inflow/outflow port of the channel switching device, characterized by further comprising a plurality of the first two-way valves (SV1a, SV1b), a plurality of the second two-way valves (SV2a, SV2b), a plurality of the third two-way valves (SV3a, SV3b), and a plurality of the fourth two-way valves (SV4a, SV4b) disposed in parallel in the first to fourth communication channels (21 to 24), respectively. a channel switching device including an inflow port for inflow of refrigerant, an outflow port for outflow of the refrigerant, first and second inflow/outflow ports (2c, 2d) for inflow or outflow of the refrigerant, a first communication channel that connects between the inflow port and the first inflow/outflow port, a second communication channel that connects between the first inflow/outflow port and the outflow port, a third communication channel that connects between the outflow port and the second inflow/outflow port, a fourth communication channel that connects between the second inflow/outflow port and the inflow port, and first to fourth two-way valves (SV1a, SV1b to SV4a, SV4b) that are disposed in the first to fourth communication channels (21 to 24) respectively and open/close the first to fourth communication channels (21 to 24) respectively; an inflow port for inflow of refrigerant, an outflow port for outflow of the refrigerant, first and second inflow/outflow ports (2c, 2d) for inflow or outflow of the refrigerant, a first communication channel that connects between the inflow port and the first inflow/outflow port, a second communication channel that connects between the first inflow/outflow port and the outflow port, a third communication channel that connects between the outflow port and the second inflow/outflow port, a fourth communication channel that connects between the second inflow/outflow port and the inflow port, and first to fourth two-way valves (SV1a, SV1b to SV4a, SV4b) that are disposed in the first to fourth communication channels (21 to 24) respectively and open/close the first to fourth communication channels (21 to 24) respectively; a compressor disposed between the outflow port and the inflow port of the channel switching device; a use-side heat exchanger connected to the first inflow/outflow port of the channel switching device; a heat-source-side heat exchanger connected to the second inflow/outflow port of the channel switching device; an expansion valve disposed between the use-side heat exchanger and the heat-source-side heat exchanger; a first annular channel that starts from the outflow port of the channel switching device through the compressor back to the inflow port of the channel switching device; and a second annular channel that starts from the first inflow/outflow port of the channel switching device through the use-side heat exchanger, the expansion valve, and the heat-source-side heat exchanger in order, back to the second inflow/outflow port of the channel switching device, characterized by further comprising a plurality of the first two-way valves (SV1a, SV1b), a plurality of the second two-way valves (SV2a, SV2b), a plurality of the third two-way valves (SV3a, SV3b), and a plurality of the fourth two-way valves (SV4a, SV4b) disposed in parallel in the first to fourth communication channels (21 to 24), respectively.