Claims
- 1. A compressor refrigeration system employing a fluorocarbon refrigerant, having a lubricant composition in contact with the fluorocarbon refrigerant, the lubricant composition having chemical and thermal stability in the presence of the fluorocarbon refrigerant, the lubricant composition consisting of a thermally stable oil of a viscosity at 100.degree. F. of from 100 to 300 SUS containing from about 5% to about 20% of the weight thereof of a liquid halogenated compound selected from the group consisting of diphenyl ethers and biphenyls and alkyl derivates thereof having at least one halogen substituent selected from the group consisting of chlorine, fluorine and mixtures thereof, the liquid halogenated compound being substantially completely soluble in the oil over the expected temperature range of the refrigeration system, the compound providing for good lubricity in the lubricant composition at cold startup, and at hot compressor operating temperatures while in vapor contact with hot fluorocarbon refrigerant, and the lubricant composition being highly resistant to chemical reaction with the fluorocarbon and/or the materials in the refrigeration system at the expected temperatures and operating conditions of the refrigeration system.
- 2. The system of claim 1, wherein the liquid halogenated compound is a diphenyl ether with an average of one chlorine group and one alkyl group per molecule, wherein the alkyl group has up to 24 carbon atoms.
- 3. The system of claim 2, wherein the liquid halogenated compound is dodecylmonochlorodiphenyloxide.
- 4. The system of claim 1 wherein the oil comprises a polyalkylbenzene compound having the formula ##STR2## where R represents a hydrocarbon group of from 8 to 24 carbon atoms and n represents from 2 to 4 as an average.
- 5. The system of claim 1 wherein the oil comprises a highly refined mineral oil having substantially no sulfur, oxygen or nitrogen containing compounds, substantially no olefinically unsaturated compounds and substantially no aromatic compounds, with a pour point of below -25.degree. C.
CROSS REFERENCE TO RELATED APPLICATION
This is a continuation of application Ser. No. 956,124, filed Oct. 30, 1978, which was a continuation of Ser. No. 334,328, filed Feb. 21, 1972, which was a continuation-in-part of Ser. No. 144,224, filed May 17, 1971, all now abandoned.
US Referenced Citations (11)
Continuations (2)
|
Number |
Date |
Country |
Parent |
956124 |
Oct 1978 |
|
Parent |
334328 |
Feb 1972 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
144224 |
May 1971 |
|