Patent · US Expired

Method of improving performance of refrigerant systems

US7018558B2 · kind B2 · utility

15Cited by
165References
6Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 20, 2002
Grant dateMar 28, 2006
Priority date—
Expiry dateMay 20, 2022

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC10N2040/50
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

A method of improving performance of refrigerant systems such as refrigerators and air conditioners that utilize a refrigerant working fluid. The working fluid consists essentially of a heat transfer fluid and a lubricant that is miscible and is otherwise compatible with the heat transfer fluid at all operating temperatures of the refrigerant system. The method is directed particularly to chlorine-free fluoro-group organic fluids and more particularly to hydrofluorocarbon heat transfer fluids. The preferred lubricants comprise polyol ester basestocks and compounded polyol esters that are highly miscible with such hydrofluorocarbon heat transfer fluids.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.