Refrigerant composition and binary refrigeration system using it
AssigneeSanyo Electric Co., Ltd.
InventorKazuo Takemasa
Life of this patent
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Abstract
A refrigerant composition capable of attaining a temperature as low as -80.degree. C., without using regulated refrigerants having a high potential of destroying the ozonosphere and capable of being used as a substituent refrigerant for R503 in view of refrigerating or other performance is provided. A refrigerant composition comprises an azeotropic mixture of trifluoromethane and hexafluoromethane.
Claims9
A refrigerant composition comprising a mixture of an azeotropic mixture of trifluoethane and hexafluoroethane and an oil returning agent, in which the oil returning agent is mixed at a ratio from 0.1 to 14% by weight based on the total weight of trifluoromethane and hexafluoromethane.
A binary refrigeration system having a high temperature refrigerant circuit and a low temperature refrigerant circuit, in which refrigerants in said low temperature refrigerant circuit are condensed by refrigerants passing through a cascade condenser in said high temperature refrigerant circuit, wherein the refrigerants sealed in said low temperature refrigerant circuit are a refrigerant composition comprising a mixture of an azeotropic mixture of a trifluoromethane and hexafluoroethane, and n-pentane, in which n-pentane is mixed at a ratio from 0.1 to 14% by weight based on the total weight for trifluoromethane and hexafluoroethane.
A binary refrigeration system having a high temperature refrigerant circuit and a low temperature refrigerant circuit and a low temperature refrigerant circuit, in which refrigerants in said low temperature refrigerant circuit are condensed by refrigerants passing through a cascade condenser in said high temperature refrigerant circuit, wherein the refrigerants sealed in said low temperature refrigerant circuit are a refrigerant composition comprising a mixture of an azeotropic mixture of a trifluoromethane and hexafluoroethane, and propane, in which propane is mixed at a ratio from 0.1 to 14% by weight based on the total weight from trifluoromethane and hexafluoroethane.
Dependencies are inferred from the claim text.