Leak detection in heating ventilating and air conditioning syste

Details Leak detection in heating ventilating and air conditioning syste Leak detection in heating ventilating and air conditioning syste

1995-08-25

1996-11-05

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73 405R, 250301, 252962, 252964, G01N 3700

Patent

active

RE0353701

ABSTRACT:
The present invention rleates to the effective leak detection of refrigerants by the addition of dyes from the general chemical class of naphthalimide fluorescent dyes in a refrigeration system where said refrigeration system employs alone, or in combination, a refrigerant in a hermetic system such as, but not limited to, chlorofluorocarbons (CFC), hydrochlorofluorocarbons (HCFC), hydrofluorocarbons (HFC) and any hydrogen, halogenated or ether derivatives of the methane, hydrogen, halogenated, ether or cyclic derivatives of either ethane, propane, butane, pentane, mixtures of HCFC, HFC, hydrocarbons, carbon dioxide and ammonia.
Leakage is determined by inspection of the sealed system using a lamp having an emission wavelength from 300 to 480 nanometers providing an indication of any system leakage.

REFERENCES:
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patent: 3770640 (1973-11-01), Bartlett
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patent: 4758366 (1988-07-01), Parekh
patent: 4938063 (1990-07-01), Leighley
patent: 5149453 (1992-09-01), Parekh
patent: 5167867 (1992-12-01), Quaife et al.
patent: 5279967 (1994-01-01), Bode

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