Solid state compressor control system
US4227862A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1978 |
| Grant date | Oct 14, 1980 |
| Priority date | — |
| Expiry date | Sep 19, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/21155
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A solid state system for controlling a compressor or pump which is driven by a motor, the compressor being loaded or unloaded manually or automatically and proportionally to maintain a selected suction-pressure setpoint and to maintain the load on the drive motor within a motor-current setpoint limit, the system having start-up and shut-down sequences which have timed stages including a delay to permit the building up of oil pressure prior to loading of the compressor and including the automatic loading and unloading of the compressor incident to start-up and shut-down. The control includes monitoring of temperatures and pressures associated with the system and automatic shut-down in response to malfunctions internal to the system, and includes automatic shutdown in response to external malfunctions as selectable options, and further includes separate malfunction indicators with a circuit for providing their operability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.