Compositions and methods for detecting leaks in HVAC/R systems
US8418530B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2008 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Jul 21, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/228
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Compositions and related methods for detecting leaks in HVAC/R components such as furnaces, portable gas heaters, swimming pool heaters, air conditioners, heat pumps, refrigerators, freezers, and other closed loop vapor compression systems, as well as heat exchangers. These compositions provide more sensitive detection of leaks in inaccessible areas of furnaces using low ODP and non-flammable compounds classified as hydrofluorochloro-ethers (HFCE's), hydrobromochlorofluoro-alkenes (HBCFA's) hydrofluoro-ethers (HFE's), and halogenated compounds which are either alkanes, alcohols, diones, acetates, ketones (e.g., butanones, pentanones), esters (e.g., propanoates), anhydrides, cycloalkanes (cycloparaffins), cycloalkenes (cycloolefins), heterocyclics (e.g., furans), and aromatics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.