| abstract |
A refrigeration apparatus, comprising: a refrigerant circuit (10), a refrigerant that is circulated in the refrigerant circuit (10) by a compressor (30) to perform a refrigeration cycle, wherein, as the refrigerant of the refrigeration circuit refrigerant (10), refrigerant represented by Molecular Formula 1 is used: C3HmFn where "m" and "n" are integers equal to or greater than 1 and equal to or less than 5, and a relationship represented by an expression m + n is satisfied = 6, and having a single double bond is a molecular structure, or a refrigerant mixture containing the refrigerant is used, predetermined functional components of resin (61, 62, 63, 64, 65) arranged to contact in the refrigerant of the circuit of refrigerant (10) are made of any of polytetrafluoroethylene, polyphenylene sulfide, phenolic resin, polyamide resin, chloroprene rubber, silicone rubber, hydrogenated nitrile rubber, fluorine-containing rubber and hydrin rubber, in the compressor (30), refrigerant oil is used, which has a quantity of saturated water equal to or greater than 2000 ppm at a temperature of 30 ° C and a relative humidity of 90%, the refrigerant oil used contains mainly polyalkylene glycol, the refrigerant oil has a surface tension equal to or greater than 0.02 N / m or equal to or less than 0.04 N / m at 20 ° C, and polyalkylene glycol has a molecular structure represented by Molecular Formula 2: R1 (R2) m (R30) nR4 where "m" and "n" are integers, the symbols "R1" and "R4" represent an alkyl or aryl group having a hydrogen or carbon number equal to or greater than 1 and equal to or less than 6, and the symbols "R2" and "R30" represent an alkyl group having the number of carbons equal to or greater than 1 and equal to or less than 4. |