Low refrigerant charge detection especially for automotive air conditioning systems
US5251453A · kind A · utility
75Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1992 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Sep 18, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2500/222
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A vehicle air conditioning system has means for measuring a first physical quantity related to air conditioning system load to produce a first signal and means for measuring a second physical quantity related to air conditioning system cooling capacity to produce a second signal. Said first and second signals are used to calculate a predicted refrigerant charge for detection of, and protection from, an inadequate refrigerant charge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.