Composition of refrigerant mixtures for high back pressure condition
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United States of America Patent
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Jan 18, 2005
Grant Date -
Feb 5, 2004
app pub date -
Mar 5, 2003
filing date -
Sep 6, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided a composition of refrigerant mixtures for high back pressure condition, comprising propane, propylene or 1,1-difluoroethane and, optionally, additive selected from the group consisting of carbon dioxide, trifluoromethyl iodide and mixture thereof. The composition according to the present invention is environment-friendly and can be directly drop in the conventional refrigerator system adopting HCFC-22 refrigerant without any systemic change.
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