Refrigerant-circulating system, and refrigerant compressor and refrigeration cycle employing the refrigerant compressor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKeisaku Ishihara, Yoshinori Shirafuji, Shin Sekiya, Noboru Masuda, Takeshi Izawa, Hideto Nakao, Makoto Tsukiji, Shinsuke Miki
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Abstract
A refrigerant-circulating system which comprises a refrigeration cycle comprising a refrigerant compressor, a condenser, an expansion mechanism and an evaporator to form a refrigerant circuit and employing a refrigerant which contains no chlorine, wherein an aromatic polyether oil having as a base oil structure a benzene ring having an ether bond is employed as a refrigerator oil.
Claims19
A refrigerant-circulating system which comprises a refrigeration cycle comprising a refrigerant compressor, a condenser, an expansion mechanism and an evaporator to form a refrigerant circuit and employing a refrigerant which contains no chlorine, wherein an aromatic polyether oil having as a base oil structure a benzene ring having an ether bond is employed as a refrigerator oil.
A method for retrofitting a refrigerant-circulating system which comprises a refrigerant cycle comprising a refrigerant compressor, a condenser, an expansion mechanism and an evaporator to form a refrigerant circuit, and employs a refrigerant containing chlorine contained in the system and a refrigerator oil contained in the refrigerant compressor, characterized in that the refrigerant containing chlorine is discharged from the refrigerant-circulating system;
- a refrigerant containing no chlorine is charged thereinto;
- and the refrigerator oil contained in the refrigerant compressor is replaced with an aromatic polyether oil having as a base oil structure a benzene ring having an ether bond or its oil mixture.
A refrigerant compressor employing a refrigerant containing no chlorine, which comprises an electrically driving element and a compressing element which compresses the refrigerant by rotating a main shaft by means of the electrically driving element, wherein an aromatic polyether oil having as a base oil structure a benzene ring having an ether bond is employed as a refrigerator oil.
Dependencies are inferred from the claim text.