Refrigeration cycle device

Abstract

A refrigeration cycle apparatus includes a refrigeration cycle in which a compressor, a heat source-side heat exchanger, an expansion device, and a load-side heat exchanger are connected by refrigerant pipes to circulate refrigerant. The refrigerant is a single-component refrigerant composed of 1,1,2-trifluoroethylene or a refrigerant mixture containing 1,1,2-trifluoroethylene. The compressor has a compression chamber and a motor in a compressor shell. A resin material is used as an insulating material for the motor.

1 . A refrigeration cycle apparatus comprising a refrigeration cycle in which a compressor, a first heat exchanger, an expansion device, and a second heat exchanger are connected by refrigerant pipes to circulate refrigerant and a refrigerating machine oil,
 the refrigerant being a single-component refrigerant comprising 1,1,2-trifluoroethylene or a refrigerant mixture containing 1,1,2-trifluoroethylene and another substance,   the compressor having, in a sealed container thereof, a compression chamber and a motor, and being a low pressure shell-type compressor configured to cause the refrigerant to flow into the sealed container, compress the refrigerant in the sealed container by using the compression chamber, and discharge the compressed refrigerant out of the sealed container, and   the refrigeration cycle apparatus being operable at an operational state in which the refrigerant in a two-phase state having a quality of more than 0 and less than 1 is allowed to flow into the sealed container of the compressor,   the refrigerating machine oil having a solubility of 50 wt % or more with respect to the refrigerant when a temperature of the refrigerant is 0 degrees C. and a pressure of the refrigerant is a saturation pressure at a refrigerant temperature of 0 degrees C.,   the motor being insulated with a resin material serving as an insulating material.   
     
     
         2 . A refrigeration cycle apparatus comprising a refrigeration cycle in which a compressor, a first heat exchanger, an expansion device, and a second heat exchanger are connected by refrigerant pipes to circulate refrigerant and a refrigerating machine oil,
 the refrigerant being a single-component refrigerant comprising 1,1,2-trifluoroethylene or a refrigerant mixture containing 1,1,2-trifluoroethylene and another substance,   the compressor having, in a sealed container thereof, a compression chamber and a motor, and being a high pressure shell-type compressor configured to cause the refrigerant to flow into the compression chamber, compress the refrigerant flowing into the compression chamber by using the compression chamber, discharge the compressed refrigerant into the sealed container, and discharge the refrigerant in the sealed container to outside the sealed container,   the refrigeration cycle apparatus being operable at an operational state in which the refrigerant at 50 degrees C. or higher is discharged into the sealed container from the compression chamber in the compressor,   the motor being insulated with a resin material serving as an insulating material,   the refrigerating machine oil having a solubility of 10 wt % or more with respect to the refrigerant when a temperature of the refrigerant is 80 degrees C. and a pressure of the refrigerant is a saturation pressure at a refrigerant temperature of 50 degrees C.   
     
     
         3 . The refrigeration cycle apparatus of  claim 1 , wherein the insulating material for the motor is at least one substance of a group comprising polyvinyl formal, polyester, THEIC-modified polyester, polyamide, polyamide imide, polyester imide, polyester amide imide, polyethylene terephthalate, polyethylene naphthalate, polyphenylene sulfide, polybutylene terephthalate, polyether ether ketone, liquid-crystal polymer, epoxy resin, polytetrafluoroethylene, and tetrafluoroethylene hexafluoropropylene copolymer resin. 
     
     
         4 - 5 . (canceled) 
     
     
         6 . The refrigeration cycle apparatus of  claim 1 , wherein the refrigeration cycle circulates the refrigerating machine oil miscible with the refrigerant. 
     
     
         7 . The refrigeration cycle apparatus of  claim 6 , wherein the refrigerating machine oil contains either of polyol ester and polyvinyl ether as a main component. 
     
     
         8 . The refrigeration cycle apparatus of  claim 6 , wherein the refrigerating machine oil has a volume resistivity of 2×10 10  Ω·m or higher at 20 degrees C. 
     
     
         9 - 10 . (canceled) 
     
     
         11 . The refrigeration cycle apparatus of  claim 2 , wherein the insulating material for the motor is at least one substance selected from the group consisting essentially of polyvinyl formal, polyester, THEIC-modified polyester, polyamide, polyamide imide, polyester imide, polyester amide imide, polyethylene terephthalate, polyethylene naphthalate, polyphenylene sulfide, polybutylene terephthalate, polyether ether ketone, liquid-crystal polymer, epoxy resin, polytetrafluoroethylene, and tetrafluoroethylene hexafluoropropylene copolymer resin. 
     
     
         12 . The refrigeration cycle apparatus of  claim 2 , wherein the refrigeration cycle is filled with a refrigerating machine oil miscible with the refrigerant. 
     
     
         13 . The refrigeration cycle apparatus of  claim 12 , wherein the refrigerating machine oil contains either of polyol ester and polyvinyl ether as a main component. 
     
     
         14 . The refrigeration cycle apparatus of  claim 12 , wherein the refrigerating machine oil has a volume resistivity of 2×10 10  Ω·m or higher at 20 degrees C.