Environmentally safer replacement refrigerant for freon 12-based refrigeration systems
AssigneeKenneth B. Ruello, Jr.
InventorHarrison M. Weber, III
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Abstract
An apparatus and method and refrigerant wherein ozone layer-damaging dichlorodifluoromethane is substituted with a mix of less environmentally damaging refrigerants chlorodifluoroethane and tetrafluoroethane in dichlorodifluoromethane-based air-cooling systems. While less environmentally damaging than dichlorodifluoromethane, the substitute refrigerant has a temperature-pressure relationship similar to that of dichlorodifluoromethane, making the substitute refrigerant suitable for use with dichlorodifluoromethane-based air-cooling systems. The refrigerant includes a lubricant which is compatible with dichlorodifluoromethane, chlorodifluoroethane and tetrafluoroethane.
Claims4
A refrigerant consisting of:
- about 15% to about 40% by weight chlorodifluoroethane;
- about 60% to about 85% by weight tetrafluoroethane;
- and
- about 0.5% to about 2% by weight of the refrigerant of a lubricating oil that is soluble in dichlorodifluoromethane, chlorodifluoroethane and tetrafluoroethane, the lubricating oil having the following composition:
- 60-80% hydrotreated light naphthenic distillate,
- 10-20% acrylic polymer in severely hyrotreated mineral oil,
- 5-15% solvent refined light naphthenic distillate petroleum,
- 2-7% barium dinonylnaphthalenesulfonate and
- <0.5% butylated triphenyl phosphate.
Dependencies are inferred from the claim text.