Adaptive refrigerant control algorithm
US4848099A · kind A · utility
66Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1988 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Sep 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A refrigeration system comprises a compressor, a condenser, an evaporator, an accumulator, and an adjustable controllable expansion valve. An electronic control system monitors the value of superheat and accordingly provides an electrical control signal to adjust the controllable expansion valve in order to maintain a set point superheat value. An unfiltered path is provided to ensure expedient response when the system starts operation and when dynamic changes occur. A filtered path is provided to reduce hunting, or oscillations about the set point, of the superheat value during steady state operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.