Refrigerant compressor

Abstract

A refrigerant compressor configured to compress ethylene fluorohydrocarbon or a mixture containing the ethylene fluorohydrocarbon as a refrigerant, the refrigerant compressor including: a compression element configured to compress the refrigerant and including a sliding component that constitutes a sliding portion; and refrigerator oil configured to be supplied to the sliding component so as to lubricate the sliding portion, wherein at least one of the sliding surfaces of the sliding component is formed by non-metal, and wherein a polymerization inhibitor configured to suppress polymerization of the refrigerant is contained in the refrigerator oil.

What is claimed is: 
     
         1 . A refrigerant compressor configured to compress ethylene fluorohydrocarbon or a mixture containing the ethylene fluorohydrocarbon as a refrigerant, the refrigerant compressor comprising:
 a compression element configured to compress the refrigerant and including a sliding component that constitutes a sliding portion; and   refrigerator oil configured to be supplied to the sliding component so as to lubricate the sliding portion,   wherein at least one of the sliding surfaces of the sliding component is formed by non-metal, and   wherein a polymerization inhibitor configured to suppress polymerization of the refrigerant is contained in the refrigerator oil.   
     
     
         2 . A refrigerant compressor configured to compress ethylene fluorohydrocarbon or a mixture containing the ethylene fluorohydrocarbon as a refrigerant, the refrigerant compressor comprising:
 a compression element configured to compress the refrigerant and including a sliding component that constitutes a sliding portion,   wherein the sliding component is a sintered component in which a polymerization inhibitor configured to suppress polymerization of the refrigerant is contained, and   wherein at least one of the sliding surfaces of the sliding component is formed by non-metal.   
     
     
         3 . A refrigerant compressor configured to compress ethylene fluorohydrocarbon or a mixture containing the ethylene fluorohydrocarbon as a refrigerant, the refrigerant compressor comprising:
 a compression element configured to compress the refrigerant and including a sliding component that constitutes a sliding portion; and   an electric element configured to drive the compression element and including windings,   wherein a polymerization inhibitor configured to suppress polymerization of the refrigerant is contained in a gap between the windings, and   wherein at least one of the sliding surfaces of the sliding component is formed by non-metal.   
     
     
         4 . The refrigerant compressor according to  claim 1 ,
 wherein the ethylene fluorohydrocarbon includes at least one of fluoroethylene (R1141), trans-1,2 difluoroethylene (R1132 (E)), cis-1,2 difluoroethylene (R1132 (Z)), 1,1 difluoroethylene (R1132a), and 1,1,2 trifluoroethylene (R1123).   
     
     
         5 . The refrigerant compressor according to  claim 1 ,
 wherein the polymerization inhibitor is a terpin compound.   
     
     
         6 . The refrigerant compressor according to  claim 5 ,
 wherein the terpin compound is at least one of limonene, pinene, camphene, cymene, terpinen, citronellol, terpineol and bornelol.   
     
     
         7 . The refrigerant compressor according to  claim 1 ,
 wherein the non-metal is formed by performing a coating process on the surface of the sliding component.   
     
     
         8 . The refrigerant compressor according to  claim 7 ,
 wherein one of DLC (diamond like carbon), DLC-Si (diamond like carbon-silicon), CrN (chromium nitride), TiN (titanium nitride), TiCN (titanium carbonitride), TiAlN (titanium nitride aluminum), WC/C (tungsten carbide coating) and VC (vanadium carbide) is coated as a coating in the coating process.   
     
     
         9 . The refrigerant compressor according to  claim 1 ,
 wherein the non-metal is configured by a non-metallic bearing member.   
     
     
         10 . The refrigerant compressor according to  claim 9 ,
 wherein the non-metallic bearing member contains PTFE (polytetrafluoroethylene) or POM (polyacetal) as a main component.   
     
     
         11 . The refrigerant compressor according to  claim 1 ,
 wherein at least one of the components constituting the sliding portion is formed by a ceramic material.   
     
     
         12 . The refrigerant compressor according to  claim 11 ,
 wherein the ceramic material is one of SiC (silicon carbide), ZrO 2  (zirconium dioxide), Al 2 O 3  (aluminum oxide) and Si 3 N 4  (silicon nitride).   
     
     
         13 . The refrigerant compressor according to  claim 1 ,
 wherein the non-metal is configured by a manganese phosphate film.   
     
     
         14 . The refrigerant compressor according to  claim 1 ,
 wherein the compression element includes,
 a ring-shaped rolling piston configured to eccentrically rotate within a cylinder chamber of a cylinder, and 
 a vane accommodated in a vane groove of the cylinder and configured to slide within the vane groove while being pressed against the rolling piston, and 
   wherein the sliding portion is constituted of a leading end of the vane and an outer periphery of the rolling piston.   
     
     
         15 . The refrigerant compressor according to  claim 1 ,
 wherein the compression element includes,
 a cylinder including a vane groove, and 
 a vane accommodated in the vane groove of the cylinder and configured to slide within the vane groove, and 
   wherein the sliding portion is constituted of the vane groove and the vane.   
     
     
         16 . The refrigerant compressor according to  claim 1 ,
 wherein the compression element includes,
 a ring-shaped rolling piston configured to eccentrically rotate within a cylinder chamber of a cylinder, and 
 a crank shaft having an eccentric shaft portion eccentric to a main shaft portion, and 
   wherein the sliding portion is constituted of an inner periphery of the rolling piston and the eccentric shaft portion of the crank shaft.   
     
     
         17 . The refrigerant compressor according to  claim 1 ,
 wherein the compression element includes,
 a crank shaft having a main shaft portion and an auxiliary shaft portion, 
 a main bearing configured to slidably engage with the main shaft portion of the crank shaft, and 
 an auxiliary bearing configured to slidably engage with the auxiliary shaft portion of the crank shaft, and 
   wherein the sliding portion is constituted of the main bearing, the auxiliary bearing and the crank shaft.