Method for detecting halocarbon refrigerant leaks by usage of a continually heated mass spectrometer
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United States of America Patent
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Apr 12, 1994
Grant Date -
N/A
app pub date -
May 31, 1991
filing date -
May 31, 1991
priority date (Note) -
Expired
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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.
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