| 摘要 |
A refrigerant working fluid comprising: A) a chlorine-free fluorogroup-containing heat transfer fluid; and B) a lubricant composition consisting essentially of at least about 92% by weight of a primary lubricant component consisting essentially of esters of (i) alcohols containing at least two -OH groups and (ii) monovalent organic carboxylic acids, wherein: a) at least 92 number percent of the total number of acyl groups in all the esters in the composition are selected from the group consisting of (i) acyl groups containing no more than 5 carbon atoms and (ii) acyl groups containing at least one carbon atom bonded to at least three carbon atoms by single bonds, or both; b) at least 90 number percent of all the alcohol moieties in the esters contain at least one carbon atom bonded to four other carbon atoms by single bonds; c) at least about 92 number percent of the acyl groups in the total of all the esters in said lubricant composition include no more than 9 carbon atoms; and d) at least 40 number percent of the acyl groups in the ester contain at least 8 carbon atoms each; and from about 0.001% to about 8% by weight of an additive component selected from the groups consisting of oxidation resistance and thermal stability improvers, corrosion inhibitors, metal deactivators, lubricity additives, viscosity index improvers, pour and floc point depressants, detergents, dispersants, antifoaming agents, anti-wear agents, and extreme pressure resistant additives; and mixtures thereof.
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