Electronic control of compressor unloader and air dryer purge
US5592754A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1996 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2207/702
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An electronically controlled compressed air system (10) includes an air dryer (16) which dries compressed air before the compressed air is communicated to a reservoir (26). The air dryer (16) includes a desiccant (18) which is purged by using air stored in the reservoir (26). A pressure transducer (13) is installed on the reservoir (26) and transits an electrical signal, indicative of the pressure in the reservoir (26) to an electric controller (11). Electric controller (11) transmits signals at various selected pressure levels to solenoid value (28) to control loading and unloading of the compressor (12), to solenoid valve (36) to control purging of the air dryer (16), and to the warning light (40) to alert an operator of a low air pressure condition. The valve (36) is operated to permit purging only when the compressor (12) is unloaded and only until a reservoir pressure is reached which is a predetermined pressure drop below the reference pressure level at which the compressor (12) is unloaded, whereupon purging is terminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.