| abstract |
A refrigeration device (100) comprises a heat source unit (10), a usage unit (20A), liquid refrigerant piping (31), and gas refrigerant piping (32). The usage unit (20A) has usage unit-internal pipelines (29a-29c). The liquid refrigerant piping (31) and the gas refrigerant piping (32) connect the heat source unit (10) and the usage unit-internal pipelines (29a-29c). The refrigerant circulates through the heat source unit (10), the usage unit (20A), the liquid refrigerant piping (31), and the gas refrigerant piping (32). The refrigerant includes a compound that is expressed by a molecular formula having one or more carbon-carbon unsaturated bonds. An inner surface of at least one section among the liquid refrigerant piping (31), the gas refrigerant piping (32), and the usage unit-internal pipelines (29a-29c) is coated with a disproportionation suppressant that suppresses disproportionation of the refrigerant. |