Refrigeration apparatus

Abstract

In a refrigeration apparatus including a refrigerant circuit in which refrigerant represented by Molecular Formula 1: C 3 H m F n (note that “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=6 is satisfied) and having a single double bond in a molecular structure, or refrigerant mixture containing the refrigerant is used, predetermined functional resin components arranged so as to contact refrigerant of the refrigerant circuit 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.

1 . A refrigeration apparatus, comprising:
 a refrigerant circuit in which refrigerant is circulated by a compressor to perform a refrigeration cycle, wherein, as refrigerant of the refrigerant circuit, refrigerant represented by Molecular Formula 1: C 3 H m F n , 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=6 is satisfied, and having a single double bond in a molecular structure, or refrigerant mixture containing the refrigerant is used; and   predetermined functional resin components arranged so as to contact the refrigerant of the refrigerant circuit 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.   
     
     
         2 . The refrigeration apparatus of  claim 1 , wherein
 the functional resin components are sliding members provided in predetermined sliding sections; and   the sliding members are made of any of polytetrafluoroethylene, polyphenylene sulfide, and polyamide resin.   
     
     
         3 . The refrigeration apparatus of  claim 1 , wherein
 the functional resin component is a sealing member for reducing or preventing a leakage of refrigerant in a predetermined clearance; and   the sealing member is made of any of polytetrafluoroethylene, polyphenylene sulfide, chloroprene rubber, silicone rubber, hydrogenated nitrile rubber, fluorine-containing rubber, and hydrin rubber.   
     
     
         4 . The refrigeration apparatus of  claim 1 , wherein,
 in the compressor, refrigerant oil is used, which has a saturated water amount of equal to or greater than 2000 ppm at a temperature of 30° C. and a relative humidity of 90%.   
     
     
         5 . The refrigeration apparatus of  claim 4 , wherein
 the refrigerant oil mainly contains at least one of polyalkylene glycol, polyol ester, and polyvinyl ether.   
     
     
         6 . The refrigeration apparatus of  claim 4 , wherein
 the refrigerant oil has kinetic viscosity of equal to or greater than 30 cSt and equal to or less than 400 cSt at 40° C., and a fluid point of equal to or less than −30° C.   
     
     
         7 . The refrigeration apparatus of  claim 4 , wherein
 the refrigerant oil has surface tension of equal to or greater than 0.02 N/m and equal to or less than 0.04 N/m at 20° C.   
     
     
         8 . The refrigeration apparatus of  claim 7 , wherein
 the refrigerant oil has a chlorine concentration of equal to or less than 50 ppm.   
     
     
         9 . The refrigeration apparatus of  claim 4 , wherein
 the refrigerant oil has a sulfur concentration of equal to or less than 50 ppm.   
     
     
         10 . The refrigeration apparatus of  claim 4 , wherein
 at least one of additives which are an acid trapping agent, an extreme pressure additive, an antioxidizing agent, an oxygen trapping agent, an antifoam agent, an oiliness agent, and a copper deactivator is added to the refrigerant oil.   
     
     
         11 . The refrigeration apparatus of  claim 10 , wherein,
 if a single type of additive is added to the refrigerant oil, the proportion of the additive is equal to or greater than 0.01% by mass and equal to or less than 5% by mass; and if multiple types of additives are added, the proportion of each additive is equal to or greater than 0.01% by mass and equal to or less than 5% by mass.   
     
     
         12 . The refrigeration apparatus of  claim 1 , wherein
 the refrigerant represented by Molecular Formula 1: C 3 H m F n  where “m” and “n” are the integers equal to or greater than 1 and equal to or less than 5, and the relationship represented by the expression m+n=6 is satisfied, and having the single double bond in the molecular structure is 2, 3, 3, 3-tetrafluoro-1-propene.   
     
     
         13 . The refrigeration apparatus of  claim 1 , wherein
 the refrigerant of the refrigerant circuit is refrigerant mixture further containing difluoromethane.   
     
     
         14 . The refrigeration apparatus of  claim 1 , wherein
 the refrigerant of the refrigerant circuit is refrigerant mixture further containing pentafluoroethane.