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`AMENDMENTS TO THE CLAIMS
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`This listing of claims will replace all prior versions, and listings, of claims in the
`
`application.
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`LISTING OF CLAIMS:
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`1.
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`(Currently Amended) A refrigeration apparatus, comprising:
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`a refrigerant circuit eenstituted—by including a compressor, a condenser, a decompressor,
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`and an evaporator connected in this order in a loop,
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`wherein, as a refrigerant in the refrigerant circuit, a refrigerant composite material that
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`contains a first refrigerant of an ultralow temperature range refrigerant having a boiling point of
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`not less than -89.0°C and not more than ~78.l°C, carbon dioxide (R744), and a second refrigerant
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`that is soluble in the carbon dioxide (R744) at a temperature lower than a boiling point of the
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`carbon dioxide (R744) is used, the second refrigerant added in a proportion that prevents the
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`carbon dioxide (1:744) from forming a solidified_pgrt_i_o_n,
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`refrigeration performance of not more than —80°C is achieved by causing the first
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`refrigerant to evaporate in the evaporator, and as the second refrigerant dissolves the carbon
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`dioxide (R744), the carbon dioxide (R744) is retained in a liquid phase or in a gas phase or the
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`solidified earben—diexide—(RMQ mm melted in a suction pipe through which the refrigerant
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`that returns from the evaporator to the compressor passes.
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`2.
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`(Currently Amended) The refrigeration apparatus according to claim 1, wherein
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`the first refrigerant contains;
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`difluoroethylene (R1 132a),
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`a mixed refrigerant of difiuoroethylene (R1132a) and hexafluoroethane (R116),
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`a mixed refrigerant of difluoroethylene (R1132a) and ethane (R170),
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`ethane (R170),
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`a mixed refrigerant of ethane (R170) and hexafluoroethane (R116),
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`an azeotropic mixture (R508A, boiling point -85.7°C) of 39 mass% trifluoromethane
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`(R23) and 61 mass% hexafluoroethane (R116), or
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`an azeotropic mixture (R508B, boiling point -86.9°C) of 46 mass% trifluoromethane
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`(R23) and 54 mass% hexafluoroethane (R116).
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`Page 2 of 6
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`
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`Serial No. 15/057,950
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`3.
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`(Currently Amended) The refrigeration apparatus according to claim 1, wherein
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`the second refrigerant contains;
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`difluoromethane (R32),
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`1,1,1,2—tetrafluoroethane (R134a),
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`n-pentane (R600),
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`isobutane (R600a),
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`1,1,1,2,3—pentafluoropentene (HFO-1234ze), or
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`l,1,1,2~tetrafluoropentene (HFO-1234yf).
`
`4.
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`(Original) The refrigeration apparatus according to claim 1, wherein
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`the carbon dioxide (R744) is added in a proportion greater than 20% to a total mass of the
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`refrigerant composite material.
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`5.
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`(Original) The refrigeration apparatus according to claim 1, wherein
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`the second refrigerant is added in a proportion at which the carbon dioxide (R744) can be
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`prevented from turning into dry ice.
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`6.
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`(Currently Amended) The refrigeration apparatus according to claim 1, wherein;
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`the refrigerant circuit includes a high-temperature—side refrigerant circuit and a low—
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`temperature-side refrigerant circuit that each constitute an independent refrigerant closed circuit
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`that condenses a refrigerant discharged from a compressor, decompresses the refrigerant with a
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`capillary tube, and exhibits a cooling effect by causing the refrigerant to evaporate in an
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`evaporator,
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`the evaporator in the high-temperature-side refrigerant circuit and the condenser in the
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`low-temperature-side refrigerant circuit constitute a cascade heat exchanger, and
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`the refrigerant composite material is used as a refrigerant in the low—temperature-
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`side refrigerant circuit that exhibits a final cooling effect in the evaporator in the low-
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`temperature—side refrigerant circuit.
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`Page 3 of6
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