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`Abstract
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`A binary refrigerating apparatus employs a refrigerant
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`composition that 1as a small global—warming po:ential
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`(GWP)
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`to
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`be earth friendly, can be used as
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`a refrigerant capable of
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`achieving a low temperature of —80°C, and is excellent in
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`composition used as a low—temperature—side refrigerant is a
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`refrigerating capacity and other performance.
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`A refrigerant
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` refrigerant mixture including a non—a7eotropic mixture in
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`10
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`which 20% by mass or less of carbon dioxide (R744)
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`is mixed to
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`difluoroethylene (R1132a).
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`A refrigerant compositior used as a
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`is a combination of: a non—
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`high—temperature—side refrigerant
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`azeotropic mixture comprising the
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`difluoromethane (R32), pentafluoroethane (R125),
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`l,l,f,2—
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`refrigerant group of
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`,3—trifluoro ethane (Rl43a);
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`(HFO—l234ze), having a
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`global—warming po:ential
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`(GWP) of
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`1500 or less.
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`15
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`te,ra _uoroethane (Ri34a) and 1,1
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`and l,f,l,2,3—pen,a 'uoropentene
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