Air conditioning system with variable capacity compressor
US4889474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Oct 28, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B49/022
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air conditioning system includes an evaporator and a variable capacity compressor. The compressor has a lower pressure zone including a suction chamber connected to the outlet of the evaporator, a higher pressure zone, a bellows displaceable in response to pressure representative of a thermal load on the system, a control valve device responsive to displacement of the bellows for bringing the higher pressure zone into and out of communication with the lower pressure zone to thereby control the difference between pressure from the higher pressure zone and pressure from the lower pressure zone, and a control element responsive to change in the difference between pressure from the higher pressure zone and pressure from the lower pressure zone for varying the delivery quantity of the compressor. The system also includes a gastight chamber formed in the compressor and accommodating the bellows, and a pressure introducing line connecting between the gastight chamber and the outlet of the evaporator and introducing pressure at the latter into the former as the pressure representative of the thermal load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.