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AssigneeHitachi, Ltd.
InventorsTadashi Iizuka, Reishi Naka, Katsumi Fukuda, Makoto Tanaka, Yoshiharu Homma, Hiroaki Hata, Hirokatsu Kousokabe, Koji Nariyoshi, Hiroshi Iwata
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A refrigerant compressor using a refrigerant composed mainly of a fluorocarbon and/or hydrofluorocarbon type refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and a refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids which contains at least two ester linkages ##STR1## in the molecule and has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt. The winding wire of the stator of the compressor has a core wire having an enamel coating having a glass transition temperature of 120.degree. C. or higher.
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a high-pressure closed vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator having a winding wire and an insulating film, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and in which a high-pressure refrigerant gas discharged from the compressor section resides, said refrigerant comprising a chlorine-free fluorocarbon and/or hydrofluorocarbon and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil consisting essentially of an ester oil obtained from a single alcohol and an acid component comprising one or more fatty acids having six to thirteen carbon atoms, wherein said ester oil has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, wherein said ester oil comprises at least one member selected from the group consisting of the ester oils represented by the following general formulae (1) to (5):
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a low-pressure closed vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator having a winding wire and an insulating film, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and from which a high-pressure refrigerant gas discharged from the compressor section is directly exhausted, said refrigerant comprising a chlorine-free fluorocarbon and/or hydrofluorocarbon and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil consisting essentially of an ester oil obtained from a single alcohol and an acid component comprising one or more fatty acids having six to thirteen carbon atoms, wherein said ester oil has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, wherein said ester oil comprises at least one member selected from the group consisting of the ester oils represented by the following general formulae (1) to (5):
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a high-pressure closed vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator having a winding wire and an insulating film, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and in which a high-pressure refrigerant gas discharged from the compressor section resides, said refrigerant comprising a chlorine-free fluorocarbon and/or hydrofluorocarbon and having a critical temperature of 40.degree. C. of higher, and said refrigerating machine oil consisting essentially of an ester oil obtained from a single alcohol and single acid, the single acid being a fatty acid having six to eleven carbon atoms, said refrigerating machine oil having a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, and said winding wire of said stator comprises a core wire having an enamel coating having a glass transition temperature of 120.degree. C. or higher.
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a low-pressure closed vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator having a winding wire and an insulating film, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and from which a high-pressure refrigerant gas discharged from the compressor section is directly exhausted, said refrigerant comprising a chlorine-free fluorocarbon and/or hydrofluorocarbon and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil consisting essentially of an ester oil obtained from a single alcohol and a single acid, the single acid being a acid having six to eleven carbon atoms, the refrigerating machine oil having a viscosity of 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, and said winding wire of said stator comprises a core wire having an enamel coating having a glass transition temperature of 120.degree. C. or higher.
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a high-pressure closed vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator having a winding wire and an insulating film, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and in which a high-pressure refrigerant gas discharged from the compressor section resides, said refrigerant being composed mainly of a fluorocarbon refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids, wherein the ester oil has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, wherein said ester oil comprises at least one member selected from the group consisting of the ester oils which are represented by the following general formulae (1) to (5):
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a low-pressure closed vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator having a winding wire and an insulating film, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and from which a high-pressure refrigerant gas discharged from the compressor section is directly exhausted, said refrigerant being composed mainly of fluorocarbon refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids wherein the ester oil has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, wherein said ester oil comprises at least one member selected from the group consisting of the ester oils which are represented by the following general formulae (1) to (5):
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a high-pressure closed vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator having a winding wire and an insulating film, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and in which a high-pressure refrigerant gas discharged from the compressor section resides, said refrigerant being composed mainly of a fluorocarbon refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids wherein the ester oil has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, wherein said ester oil comprises at least one member selected from the group consisting of the ester oils which are represented by the following general formulae (1) to (5):
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a low-pressure closed vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator having a winding wire and an insulating film, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and from which a high-pressure refrigerant gas discharged from the compressor section is directly exhausted, said refrigerant being composed mainly of fluorocarbon refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids wherein the ester oil has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, wherein said ester oil comprises at least one member selected from the group consisting of the ester oils which are represented by the following general formulae (1) to (5):
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a high-pressure closed vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and in which a high-pressure refrigerant gas discharged from the compressor section resides, said refrigerant being composed mainly of a fluorocarbon refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids having six to thirteen carbon atoms which ester oil contains at least two ester linkages ##STR23## in the molecule and has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, said closed-vessel accommodating a motor composed of a rotor an a stator, a rotating shaft, and a compressor section connected to the motor through the rotating shaft, wherein a winding wire of the stator comprises a core wire having an enamel coating having a glass transition temperature of 120.degree. C. or higher.
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a high-pressure closed-vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and in which a high-pressure refrigerant gas discharged from the compressor section resides, said refrigerant being composed mainly of a fluorocarbon refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids having six to thirteen carbon atoms which ester oil contains at least two ester linkages ##STR24## in the molecule and has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, wherein an insulating film of the motor comprises a crystalline plastics film having a glass transition temperature of 50.degree. C. or higher, and said winding wire of said stator comprises a core wire having an enamel coating having a glass transition temperature of 120.degree. C. or higher.
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a low-pressure closed-vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and from which a high-pressure refrigerant gas discharged from the compressor section is directly exhausted, said refrigerant being composed mainly of a fluorocarbon refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids having six to thirteen carbon atoms which ester oil contains at least two ester linkages ##STR25## in the molecule and has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, said closed-vessel accommodating a motor composed of a rotor an a stator, a rotating shaft, and a compressor section connected to the motor through the rotating shaft, wherein a winding wire of the stator comprises a core wire having an enamel coating having a glass transition temperature of 120.degree. C. or higher.
A refrigerant compressor used in a refrigeration cycle wherein the refrigerant compressor comprises a low-pressure closed-vessel stored with a refrigerating machine oil which accommodates a motor composed of a rotor and a stator, a rotating shaft fitted in the rotor, and a compressor section connected to the motor through the rotating shaft, and from which a high-pressure refrigerant gas discharged from the compressor section is directly exhausted, said refrigerant being composed mainly of a fluorocarbon refrigerant containing no chlorine and having a critical temperature of 40.degree. C. or higher, and said refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids having six to thirteen carbon atoms which ester oil contains at least two ester linkages ##STR26## in the molecule and has a viscosity at 40.degree. C. of 2 to 70 cSt and a viscosity at 100.degree. C. of 1 to 9 cSt, wherein an insulating film of the motor comprises a crystalline plastics film having a glass transition temperature of 50.degree. C. or higher, and said winding wire of said stator comprises a core wire having an enamel coating having a glass transition temperature of 120.degree. C. or higher.
Dependencies are inferred from the claim text.