Compressor economizer circuit with check valve
US6202438A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Nov 23, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2400/13
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An improved efficiency economizer system for compressors incorporates the use of a check valve blocking return flow into the economizer return line. The economizer return line communicates with an economizer port, which communicates with a compression chamber. Pressure in the compression chamber can vary during the operational cycle of the compressor. Thus, in the past, there has sometimes been backflow of refrigerant through the economizer injection port and into the return line. The present invention prevents this backflow. Most preferably, the invention is utilized on scroll compressors; however, other types of compressors may benefit from this invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.