High speed variable delivery helical screw compressor/expander automotive air conditioning and waste heat energy _recovery system
US4220197A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 1979 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | Jan 2, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A30/274
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A compact, helical screw compressor/expander unit mounted in a vehicle and connected to the vehicle engine driven drive shaft has inlet and outlet ports and a capacity control slide valve and a pressure matching or volume ratio slide valve, respectively, for said ports. A refrigerant loop includes the compressor, a condenser mounted in the path of air flow over the engine and an evaporator mounted in a fresh air/cab return air flow duct for the occupant. Heat pipes thermally connect the cab air flow duct to the engine exhaust system which also bears the vapor boiler. Selectively operated damper valves control the fresh air/cab return air for passage selectively over the evaporator coil and the heat pipes as well as the exhaust gas flow over opposite ends of the heat pipes and the vapor boiler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.