Retrofitting R410A HVAC products to handle flammable refrigerants
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United States of America Patent
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Nov 2, 2021
Grant Date -
Jun 27, 2019
app pub date -
Dec 20, 2018
filing date -
Dec 26, 2017
priority date (Note) -
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Abstract
A system and method of retrofitting a heating, ventilation, air conditioning, and refrigeration system (HVACR) including one or more brazed, soldered, or mechanical connections between refrigerant lines is disclosed. The method includes removing a refrigerant from the HVACR system. The refrigerant that is removed is a non-flammable refrigerant. An enclosure is installed over the one or more brazed, soldered, or mechanical connections between refrigerant lines. A refrigerant is added to the HVACR system. The refrigerant being added has a global warming potential (GWP) that is relatively lower than the refrigerant removed from the HVACR system. The refrigerant being added has a relatively higher flammability than the refrigerant removed from the HVACR system.
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