Composition of refrigerant mixtures for low back pressure condition
AssigneeACM Tech
InventorSeung-Yon Cho
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Abstract
There is provided a composition of refrigerant mixtures for low back pressure condition, comprising isobutane, 1,1-difluoroethane and, optionally, additive selected from the group consisting of carbon oxide, trifluoromethyl iodide and mixture thereof. The composition according to the present invention is environment-friendly and can be directly drop in the conventional refrigerator system adopting CFC-12 refrigerant without any systemic change.
Claims3
A refrigerant composition for use in low back pressure condition containing a refrigerant and a positive addition of an additive, wherein a) the refrigerant is a mixture of isobutane and 1,1-difluoroethane, the content of the isobutane is in an amount of 25˜35 wt %, the content of the 1,1-difluoroethane is in an amount of 65˜75 wt % and the sum of the isobutane and the 1,1-difluoroethane is 100 wt % based on the total weight of the refrigerant, b) the additive is selected from the group consisting of carbon dioxide (CO2), trifluoromethyl iodide (CF3I) and mixture thereof which prevents flammability of the isobutane, the content of the additive is in an amount of less than 5 wt % based on the refrigerant, and c) the refrigerant composition shows an azeotropic behavior.
Dependencies are inferred from the claim text.