Rotary displacement compression heat transfer systems incorporating highly fluorinated refrigerant-synthetic oil lubricant compositions
US4916914A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1988 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | May 27, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B1/047
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A rotary displacement compression heat transfer system and method for improving its efficiency includes a rotary displacement compressor for compressing a refrigerant, a condensor connected with the outlet of the compressor, an evaporator connected with the inlet of the compressor, an oil pump for injecting oil into the compressor, an oil separator for separating out the oil and recirculating it to the compressor, a non-chlorinated fluorinated refrigerant, and a synthetic oil providing an inverse solubility characteristic where a mixture of the refrigerant and oil has two immiscible phases in the compressor's operating temperature range at a weight concentration of oil in the range of about 10-60% and has only one dissolved liquid phase at a temperature in the evaporator's operating range at a weight concentration of oil less than about 5%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.