A refrigeration apparatus comprising: a refrigerant circuit configured to perform a refrigeration cycle in which a pressure above a critical pressure is applied to a refrigerant, and a heat source unit, wherein the heat source unit comprises a compression unit, a heat source-side heat exchanger, and a refrigeration apparatus-use unit, wherein the compression unit is configured to compress the refrigerant and includes a first compressor, a second compressor, and a third compressor, the first compressor constituting a higher stage-side compressor, and the second compressor and the third compressor constituting a lower stage-side compressor, wherein the first compressor is connected in series with the second compressor and with the third compressor, and the second compressor and the third compressor are connected in parallel, wherein a first suction pipe and a first discharge pipe are connected to the first compressor, a second suction pipe and a second discharge pipe are connected to the second compressor, and a third suction pipe and a third discharge pipe are connected to the third compressor, wherein the refrigeration apparatus-use unit comprises a switching mechanism (TV1, TV2, TV3, TV4, FV) configured to switch a flow path of the refrigerant in the refrigerant circuit, wherein the switching mechanism (TV1, TV2, TV3, TV4, FV) includes: an electric motor; a flow path switching portion to be driven by the electric motor; a first port connected to the first discharge pipe; a second port connected to the third suction pipe; and a third port connected to a predetermined flow path of the refrigerant circuit, the switching mechanism is constituted by a first electrically driven three-way valve and a second electrically driven three-way valve, the first three-way valve and the second three-way valve each comprising the first port, the second port, and the third port, and each of the first three-way valve and the second three-way valve is switched to a first state in which the first port communicates with the third port or a second state in which the second port communicates with the third port in such a manner that the electric motor drives the flow path switching portion. a refrigerant circuit configured to perform a refrigeration cycle in which a pressure above a critical pressure is applied to a refrigerant, and a heat source unit, wherein the heat source unit comprises a compression unit, a heat source-side heat exchanger, and a refrigeration apparatus-use unit, wherein the compression unit is configured to compress the refrigerant and includes a first compressor, a second compressor, and a third compressor, the first compressor constituting a higher stage-side compressor, and the second compressor and the third compressor constituting a lower stage-side compressor, wherein the first compressor is connected in series with the second compressor and with the third compressor, and the second compressor and the third compressor are connected in parallel, wherein a first suction pipe and a first discharge pipe are connected to the first compressor, a second suction pipe and a second discharge pipe are connected to the second compressor, and a third suction pipe and a third discharge pipe are connected to the third compressor, wherein the refrigeration apparatus-use unit comprises a switching mechanism (TV1, TV2, TV3, TV4, FV) configured to switch a flow path of the refrigerant in the refrigerant circuit, wherein the switching mechanism (TV1, TV2, TV3, TV4, FV) includes: an electric motor; a flow path switching portion to be driven by the electric motor; a first port connected to the first discharge pipe; a second port connected to the third suction pipe; and a third port connected to a predetermined flow path of the refrigerant circuit, the switching mechanism is constituted by a first electrically driven three-way valve and a second electrically driven three-way valve, the first three-way valve and the second three-way valve each comprising the first port, the second port, and the third port, and each of the first three-way valve and the second three-way valve is switched to a first state in which the first port communicates with the third port or a second state in which the second port communicates with the third port in such a manner that the electric motor drives the flow path switching portion. the switching mechanism (TV1, TV2, TV3, TV4, FV) includes: an electric motor; a flow path switching portion to be driven by the electric motor; a first port connected to the first discharge pipe; a second port connected to the third suction pipe; and a third port connected to a predetermined flow path of the refrigerant circuit, an electric motor; a flow path switching portion to be driven by the electric motor; a first port connected to the first discharge pipe; a second port connected to the third suction pipe; and a third port connected to a predetermined flow path of the refrigerant circuit, the switching mechanism is constituted by a first electrically driven three-way valve and a second electrically driven three-way valve, the first three-way valve and the second three-way valve each comprising the first port, the second port, and the third port, and each of the first three-way valve and the second three-way valve is switched to a first state in which the first port communicates with the third port or a second state in which the second port communicates with the third port in such a manner that the electric motor drives the flow path switching portion.