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An apparatus and method 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 dichlorodiflu

An apparatus and method 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 substitute refrigerant can be used alone or in combination with dichlorodifluoromethane. In either event, it is mixed with a relatively small percentage of a hydrophobic lubricating oil which is compatible with both the substitute refrigerant and with dichlorodifluoromethane.

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1. A refrigerant consisting essentially of:(a) a mixture of chlorodifluroethane and tetrafluoroethane consisting essentially of:(a1) about 5% to about 40% by weight chlorodifluoroethane; and(b1) about 60% to about 95% by weight tetrafluoroethane; and(b) about 0.5% to about 2% by weight of the refrig

1. A refrigerant consisting essentially of:(a) a mixture of chlorodifluroethane and tetrafluoroethane consisting essentially of:(a1) about 5% to about 40% by weight chlorodifluoroethane; and(b1) about 60% to about 95% by weight tetrafluoroethane; and(b) about 0.5% to about 2% by weight of the refrigerant of a hydrophobic lubricating oil that is miscible with the chlorodifluoroethane and tetrafluoroethane, wherein no more than 5% by weight of the hydrophobic lubricating oil is hydrophilic lubricant. 2. The refrigerant of claim 1 wherein:the amount by weight of chlorodifluoroethane is about 20%; andthe amount by weight of tetrafluoroethane is about 80%. 3. The refrigerant of claim 1 wherein:the amount by weight of chlorodifluoroethane is about 15% to about 20%; andthe amount by weight of tetrafluoroethane is about 80% to about 85%. 4. The refrigerant of claim 1 wherein:the amount by weight of chlorodifluoroethane is about 40%; andthe amount by weight of tetrafluoroethane is about 60%. 5. The refrigerant of claim 1, wherein the lubricating oil is also miscible with dichlorodifluoromethane. 6. The refrigerant of claim 1, consisting of:(a) about 15% to about 40% by weight chlorodifluoroethane;(b) about 60% to about 85% by weight tetrafluoroethane; and(c) about 0.5% to about 2% by weight of the refrigerant of the hydrophobic lubricating oil that is miscible with the chlorodifluoroethane and tetrafluoroethane. 7. The refrigerant of claim 1, wherein the hydrophobic lubricating oil is present in an amount of 1.50-1.75% by weight of the refrigerant. 8. The refrigerant of claim 1, wherein the lubricating has a viscosity of 5-500 centistokes. 9. The refrigerant of claim 1, wherein the lubricant has a viscosity of 5-10 centistokes. 10. The refrigerant of claim 1, further comprising a corrosion inhibitor for anhydrous systems. 11. In an apparatus for refrigerating that is designed for use with ozone layer-damaging dichlorodifluoromethane refrigerant, the improvement comprising substituting at least a part of the dichlorodifluoromethane with the refrigerant of claim 1. 12. A method for refilling an apparatus for refrigeration that is designed for use with ozone layer-damaging dichlorodifluoromethane refrigerant, the method comprising:(1) supplying the refrigerant of claim 1 under pressure, in an aerosol can fitted with an outlet compatible with a dichlorodifluoromethane recharging manifold of the apparatus; and(2) adding to said apparatus via the manifold the refrigerant of claim 1. 13. In an apparatus for automobile air-conditioning designed for use with ozone layer-damaging dichlorodifluoromethane refrigerant the improvement comprising substituting at least a portion of the dichlorodifluoromethane with the refrigerant of claim 1. 14. A method for refilling an apparatus for automobile air-conditioning that is designed for use with ozone layer-damaging dichlorodifluoromethane refrigerant, the method comprising:(1) supplying the refrigerant of claim 1 under pressure in an aerosol can fitted with an outlet compatible with a dichlorodifluoromethane recharging manifold of the apparatus; and(2) adding to said apparatus via the manifold the refrigerant of claim 1. 15. The refrigerant of claim 1, wherein no more than 2% by weight of the hydrophobic lubricating oil is hydrophilic lubricant. 16. The refrigerant of claim 1, wherein the hydrophobic lubricating oil contains no hydrophilic lubricant.