Method for detecting halocarbon refrigerant leaks by usage of a continually heated mass spectrometer
US5301537A · kind A · utility
14Cited by
27References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 31, 1991 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | May 31, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/205
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Detection of leakages of refrigerant from compressor-evaporator-condenser circuits is carried out with an electron multiplier equipped mass spectrometer of which the evacuated detector chamber is maintained at substantially constant elevated temperature in the range about 60 to about 130.degree. C. This allows high gain settings to be employed allowing detection of very small leakage rates by direct sampling from the ambient atmosphere while distinguishing from chemically analogous halogenated hydrocarbons used as blowing agents for foamed insulation and present in substantial concentrations in the ambient atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.