We Claim:
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
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.
2. 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).
3. The refrigerant compressor according to claim 1 or 2, wherein the polymerization inhibitor is a terpin compound.
4. The refrigerant compressor according to claim 3,
wherein the terpin compound is at least one of limonene, pinene, camphene, cymene, terpinen, citronellol, terpineol and bornelol.
5. The refrigerant compressor according to any one of claims 1 to 4,
wherein the non-metal is formed by performing a coating process on the surface of the sliding component.
6. The refrigerant compressor according to claim 5,
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.
7. The refrigerant compressor according to any one of claims 1 to 4, wherein the non-metal is configured by a non-metallic bearing member.
8. The refrigerant compressor according to claim 7,
wherein the non-metallic bearing member contains PTFE (polytetrafluoroethylene) or POM (polyacetal) as a main component.
9. The refrigerant compressor according to any one of claims 1 to 4,
wherein at least one of the components constituting the sliding portion is formed by a ceramic material.
10. The refrigerant compressor according to claim 9,
wherein the ceramic material is one of SiC (silicon carbide), ZrO2 (zirconium dioxide), Al2O3 (aluminum oxide) and Si3N4 (silicon nitride).
11. The refrigerant compressor according to any one of claims 1 to 4, wherein the non-metal is configured by a manganese phosphate film.
12. The refrigerant compressor according to any one of claims 1 to 6, 9 and 10, 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.
13. The refrigerant compressor according to any one of claims 1 to 6, 9 and 10,
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.
14. The refrigerant compressor according to any one of claims 1 to 4, 7, 8 and 11,
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.
15. The refrigerant compressor according to any one of claims 1 to 4, 7, 8 and 11,
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.