30
`
`Claims
`
`l.
`
`
`A binary refrigerating apparatus comprising a high—
`
`
`temperature—side refrigeration circuit and a low—temperature—
`
`
`side refrigeration circuit, which achieves a refrigerating
`
`
`
`
`capacity 0:
`
`
`—80°C or lower by condensing a refrigerart in the
`
`
`low—temperature—side refrigeration circuit with a refrigerant
`
`passing through a cascade condenser in the high—temperature—
`
`
`side refrigeration circuit,
`
`wherein a refrigerant composition containing
`
`
`
`
`
`
`di
`fluoroethylene (RllB2a) and hexafluoroethane (Ril6)
`
`is used
`
`
`
`as the refrigerant in the low—temperature—side refrigeration
`
`circuit,
`
`so that an evaporation temperature reaches a
`
`
`
`
`F di
`"luoroethylene
`
`temperature lower than both boiling points 0
`
`(R1132a) and hexafluoroethane (Rll6).
`
`
`
`
`
`15
`
`2.
`
`A binary refrigerating apparatus comprising a high—
`
`
`temperature—side refrigeration circuit and a low—temperature—
`
`
`side refrigeration circuit, which achieves a refrigerating
`
`
`
`
`capacity 0:
`
`
`—80°C or lower by condensing a refrigerart in the
`
`
`low—temperature—side refrigeration circuit with a refrigerant
`
`passing through a cascade condenser in the high—temperature—
`
`
`side refrigeration
`
`circuit,
`
`wherein a re
`
`
`difluoroethylene (RllB2a) and more than 0% by mass and 20% by
`
` frigerant composition containing
`
`
`
`mass or less of carbon dioxide (R744)
`
`is used as the
`
` re
`
`frigerant in the low—temperature—side refrigeration circuit,
`
`
`
`20
`
`25
`
`
`
`Claims
`
`l.
`
`
`A binary refrigerating apparatus comprising a high—
`
`
`temperature—side refrigeration circuit and a low—temperature—
`
`
`side refrigeration circuit, which achieves a refrigerating
`
`
`
`
`capacity 0:
`
`
`—80°C or lower by condensing a refrigerart in the
`
`
`low—temperature—side refrigeration circuit with a refrigerant
`
`passing through a cascade condenser in the high—temperature—
`
`
`side refrigeration circuit,
`
`wherein a refrigerant composition containing
`
`
`
`
`
`
`di
`fluoroethylene (RllB2a) and hexafluoroethane (Ril6)
`
`is used
`
`
`
`as the refrigerant in the low—temperature—side refrigeration
`
`circuit,
`
`so that an evaporation temperature reaches a
`
`
`
`
`F di
`"luoroethylene
`
`temperature lower than both boiling points 0
`
`(R1132a) and hexafluoroethane (Rll6).
`
`
`
`
`
`15
`
`2.
`
`A binary refrigerating apparatus comprising a high—
`
`
`temperature—side refrigeration circuit and a low—temperature—
`
`
`side refrigeration circuit, which achieves a refrigerating
`
`
`
`
`capacity 0:
`
`
`—80°C or lower by condensing a refrigerart in the
`
`
`low—temperature—side refrigeration circuit with a refrigerant
`
`passing through a cascade condenser in the high—temperature—
`
`
`side refrigeration
`
`circuit,
`
`wherein a re
`
`
`difluoroethylene (RllB2a) and more than 0% by mass and 20% by
`
` frigerant composition containing
`
`
`
`mass or less of carbon dioxide (R744)
`
`is used as the
`
` re
`
`frigerant in the low—temperature—side refrigeration circuit,
`
`
`
`20
`
`25
`
`
`
`31
`
`so that an evaporation tempera
`
`:ure reaches a temperature lower
`
`than both
`
`boiling points 0
`
`
`
`7 di
`’iuoroethylene
`
`(R1132a) and
`
`
`
`carbon dioxide
`
`(R744).
`
`3.
`
`The
`
`wherein a
`
`frigerating apparatus according to claim 1,
`
`binary re
`
`
`refrigerant composition in which carbon dioxide
`
`(R744)
`
`is
`
`
`
`further mixed is used as the refrigerant in the low—
`
`
`
` temperature—side refrigeration circuit,
`
`
`
`temperature reaches a temperature lower than any boiling
`
`
`
`
`di
`’iuoroethylene (R1132a),
`
`points 0
`
`
`hexafluoroethane
`
`(R116),
`
`10
`
`and carbon dioxide
`
`(R744).
`
`so that an evaporation
`
`4.
`
`The
`
`binary re
`
`
`wherein hexafluoroethane (
`
`frigerating apparatus according to claim 2,
`
`
`
`1116)
`
`is
`
`
`further mixed as the
`
` re
`
`frigerant in the low—temperature—side refrigeration circuit.
`
`frigerating apparatus according to claim 4,
`
`binary re
`
`
`refrigerant composi
`
`tion
`
`in which di
`
` fluoroethylene
`
`
`
`
`/ hexafluoroethane (1116)
`
`/ carbon dioxide
`
`(R74-)
`
`
`
`o\°
`
`to 68.4% by mass / 4.0 to l-.0
`
`
`the refrigerant in the low—
`
`27.6 to 2
`
`9.2% by mass / 56.8
`
`by mass are mixed is used as
`
`
`
`5.
`
`The
`
`15
`
`wherein a
`
`(R1132a)
`
`temperatu
`
`20
`
`6.
`
`The
`
`wherein a
`
`(R1132a)
`
`re—side refrigeration circuit.
`
`frigerating apparatus according to claim 4,
`
`
`binary re
`
`
`refrigerant composi
`
`tion
`
`in which di
`
` fluoroethylene
`
`
`
`
`/ hexafluoroethane (1116)
`
`/ carbon dioxide
`
`(R744) =
`
`54.8 to 5
`
`8.3% by mass / 25.2
`
`by mass are mixed is used as
`
`to 35.7% by mass / 8.0 to 18.0%
`
`
`the refrigerant in the low—
`
`25
`
`
`temperature—side refrigeration circuit.
`
`
`
`
`
`32
`
`7.
`
`The binary refrigerating apparatus according to claim 1,
`
`
`
`wherein a refrigerant composition in which n—pentane is mixed
`
`
`
`in a ratio 0'
`
`I]
`
`4% by mass or
`
`less with respect
`
`to the total
`
`
`
`
`
`mass of the refrigerant composition in th low t mp ratur
`
`
`side refrigeration circuit is used.
`
`
`
`8.
`
`The binary refrigerating apparatus according to claim 1,
`
`
`wherein a refrigerant composition in which propane (R290)
`I]
`
`
`mixed in a ratio 0'
`
`4% by mass or less with respect to the
`
`is
`
`
`
`
`
`
`total mass of the refrigerant composition in the low—
`
`temperature—side refrigeration circuit is used.
`
`The binary refrigerating apparatus according to claim 1,
`
`
`
`
`
`9.
`
`
`wherein a refrigerant composition, containing a non—azeotropic
`
`
`
`
`mixture comprising the refrigerant group o" di"'uoromethane
`
`
`
`(132), pentaf'uoroethane (R125),
`
`
`
`(1134a), and
`
`
`
`
`
`,i,3—tri’luoroethane (Ri43a), and l,l,l,2,3—
`
`
`l,l,l,2—tetra“ uoroethane
`
`
`
`
`
`
`
`
`
`pentafluoropentene (HFO—l234ze), and having a Global—warming
`
`potential
`
`
`(GWP) of 1500 or less,
`
`
`is used as the refrigerant in
`
`
`the high—temperature—side re'frigeration circuit.
`
`10.
`
`The binary refrigerating apparatus according to claim 1,
`
`
`
`
`
`
`
`
`wherein a refrigerant composition, containing a non—azeotropic
`
`
`
`
`mixture comprising the refrigerant group o" di"'uoromethane
`
`
`
`(132), pentaf'uoroethane (R125),
`
`
`
`(1134a), and
`
`
`
`
`
`
`
`
`,i,3—tri’luoroethane (Ri43a), and l,l,l,2—
`
`tetrafluoropentene (HFO—l234yf), and having a Global—warming
`
`
`
`
`
`potential
`
`
`(GWP) o: 1500 or less,
`
`
`is used as the refrigerant in
`
`
`l,l,l,2—tetra“ uoroethane
`
`
`
`
`
`
`
`10
`
`15
`
`20
`
`25
`
`
`
`33
`
`
`the high—temperature—side re'
`
`frigeration circuit.
`
`lL
`
`
`The binary refrigerating apparatus accordirg to claim 2,
`
`wherein a refrigerant composition in which n—peqtane is mixed
`
`so the ,otal
`
`
`in a ratio 0'
`
` I]
`
`
`
`
`mass of
`
`the refrigerant composition in th
`
`
`side refrigeration
`
`circuit
`
`is used.
`
`
`
`
`
`low :
`
`mp ra‘:ur
`
`4% by mass or less with respect
`
`12.
`
`The binary re
`
`frigerating apparatus according to
`
`claim 2,
`
`
`
`at composition in which propane
`
`(R290)
`
`is
`
`
`wherein a refrigera
`I]
`
`
`10
`mixed in a ratio 0'
`
`4% by mass or less with respect to the
`
`:ion in the low—
`
`
`
`frigerant composi
`
`
`total mass of
`
`the re:
`
` temperature—side re
`
`frigeration circui:
`
`
`
`frigerating appara
`
`is used.
`
`claim 2,
`
` :us according to
`
`qt composition,
`
`
`the refrigerant
`
`containing a non—azeotropic
`
`
`
`group o di"'uoromethane
`
`",2—tetra"'
` uoroethane
` (Ri43a),
`
`and l,l,l,2,3—
`
`13.
`
`The binary re
`
`
`wherein a refrigera
`
`15
`
`mixture comprising
`
`
`
`pentaf'uoroe
`
`(R32),
`
` (1134a), and
`
`
`
`
`
`:hane
`
`(Rl25),
`
`1,1,
`
`
`
`
` ri’luoroethane
`,1,3—
`
`pentafluoropentene
`
`(HFO—l234ze),
`
`and having a Global—warming
`
`potential
`
`
`(GWP) of
`
`1500 or less,
`
`
`is used as the refrigerant in
`
`
`
`2O
`
`
`the high—temperature—side re'
`
`frigeration circuit.
`
`14.
`
`The binary re
`
`frigerating apparatus according to
`
`claim 2,
`
`
`wherein a refrigera
`
`mixture comprising
`
`qt composition,
`
`
`the refrigerant
`
`containing a non—azeotropic
`
`
`
`group o di"'uoromethane
`
`:hane
`
`(Rl25),
`
`1,1,
`
`
`
`",2—tetra"'
` uoroethane
` (Ri43a),
`
`and l,l,l,2—
`
`
`
`
`
`pentaf'uoroe
`
`(R32),
`
`
`
`25
`
`(1134a),
`
`and
`
`
`
`
` ri’luoroethane
`,1,3—
`
`
`
`
`
`te,rajluoropehtehe (HFO—1234yf), and having a Global—warming
`
`34
`
`
`
` po,eh,ial
`
`(GWP) o: 1500 or less,
`
`
`is used as the refrigerant in
`
`
`
`
`the high—temperatare—side resrigeratiOH circuit.
`
`10
`
`15
`
`20
`
`25
`
`
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