Method for checking the refrigerant-fluid level of a closed loop vehicle air-conditioning system
US6508067B2 · kind B2 · utility
2Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2000 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Dec 15, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B49/022
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A signal value is derived that is representative of the cooling power produced by an air-conditioning evaporator, the signal value being derived from at least one temperature sensor placed in thermal contact with the evaporator, or downstream from it in the cooled airflow, and the signal value is compared with a reference value corresponding to a normal refrigerant-fluid level. A signal value below the reference value indicates a low level of refrigerant-fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.