Two stage reciprocating compressors and associated HVAC systems and methods
US6331925A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2000 |
| Grant date | Dec 18, 2001 |
| Priority date | — |
| Expiry date | Jun 29, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2400/074
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A two stage reciprocating compressor and associated HVAC systems and methods are disclosed. The reciprocating compressor includes a crankshaft having an eccentric crankpin, a reversible motor for rotating the crankshaft in a forward and a reverse direction, and an eccentric, two position cam rotatably mounted over the crankpin. The crankshaft and cam combine to cause the piston to have a first stroke when the motor operates in the forward direction and a second stroke when the motor operates in the reverse direction. The cam and crankpin also include stabilization means to restrict the relative rotation of the cam about the crankpin. A lubrication system is provided to lubricate the engaging surfaces of the crankshaft and cam and between the cam and the bearing surface of the connecting rod. There is also provided a control for selectively operating the motor either in the forward direction at a first power load or in the reverse direction at a reduced second power load. A protector for the motor is also provided. In addition, the application of the reciprocating compressor to both air conditioning and heat pump systems is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.