`
`no NOT ENTER:
`
`/P_s.s./
`
`AMENDMENTS TO THE CLAIMS
`
`This listing of claims will replace all prior versions, and listings, of claims in the
`
`application.
`
`LISTING OF CLAIMS:
`
`1.
`
`(Currently Amended) A refrigeration apparatus, comprising:
`
`a refrigerant circuit including a compressor, a condenser, a decompressor, and an
`
`evaporator connected in this order in a loop,
`
`wherein, as a refrigerant in the refrigerant circuit, a refrigerant composite material
`
`that contains a first refrigerant of an ultralow temperature range refrigerant having a
`
`boiling point of not less than -89.0°C and not more than -78.1°C, carbon dioxide (R744),
`
`and a second refrigerant that is soluble in the carbon dioxide (R744) at a temperature
`
`lower than a boiling point of the carbon dioxide (R744) is used, the second refrigerant
`
`added in a proportion that prevents the carbon dioxide (R744) from forming a solidified
`
`portion at a temperature lower than a boiling point of carbon dioxide,
`
`refrigeration performance of not more than -80°C is achieved by causing the first
`
`refrigerant to evaporate in the evaporator, and as the second refrigerant dissolves the
`
`carbon dioxide (R744), the carbon dioxide (R744) is retained in a liquid phase or in a gas
`
`phase or the solidif1ed portion is melted in a suction pipe through which the refrigerant
`
`that returns from the evaporator to the compressor passes.
`
`2.
`
`(Previously Presented) The refrigeration apparatus according to claim 1, wherein
`
`the first refrigerant contains;
`
`difluoroethylene (R1 132a),
`
`a mixed refrigerant of difluoroethylene (Rl 132a) and hexafluoroethane (R116),
`
`a mixed refrigerant of difluoroethylene (Rl l32a) and ethane (R170),
`
`ethane (R170),
`
`a mixed refrigerant of ethane (R170) and hexafluoroethane (R116),
`
`an azeotropic mixture (R508A, boiling point -85.7°C) of 39 mass% trifluoromethane
`
`(R23) and 61 mass% hexafluoroethane (R116), or
`
`Page 2 of 7
`
`
`
`Serial No. 15/057,950
`
`130 NOT ENTER:
`
`/P.S.S./
`
`an azeotropic mixture (R508B, boiling point -86.9°C) of 46 mass% trifluoromethane
`
`(R23) and 54 mass% hexafluoroethane (R1 16).
`
`3.
`
`(Previously Presented) The refrigeration apparatus according to claim 1, wherein
`
`the second refrigerant contains;
`
`difluoromethane (R32),
`
`1, l , l,2-tetrafluoroethane (Rl 34a),
`
`n-pentane (R600),
`
`isobutane (R600a),
`
`l, l,l,2,3-pentafluoropentene (HFO-l234ze), or
`
`1, l, l ,2-tetrafluoropentene (HFO-l234yf).
`
`4.
`
`(Original) The refrigeration apparatus according to claim 1, wherein
`
`the carbon dioxide (R744) is added in a proportion greater than 20% to a total mass of the
`
`refrigerant composite material.
`
`5.
`
`(Original) The refrigeration apparatus according to claim 1, wherein
`
`the second refrigerant is added in a proportion at which the carbon dioxide (R744) can be
`
`prevented from turning into dry ice.
`
`6.
`
`(Previously Presented) The refrigeration apparatus according to claim 1, wherein;
`
`the refrigerant circuit includes a high-temperature-side refrigerant circuit and a low-
`
`temperature-side refrigerant circuit that each constitute an independent refrigerant closed circuit
`
`that condenses a refrigerant discharged from a compressor, decompresses the refrigerant with a
`
`capillary tube, and exhibits a cooling effect by causing the refrigerant to evaporate in an
`
`evaporator,
`
`the evaporator in the high-temperature-side refrigerant circuit and the condenser in the
`
`low-temperature-side refrigerant circuit constitute a cascade heat exchanger, and
`
`the refrigerant composite material is used as a refrigerant in the low-temperature-
`
`side refrigerant circuit that exhibits a final cooling effect in the evaporator in the low-
`
`temperature-side refrigerant circuit.
`
`Page 3 of 7
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`
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