RETROFITTING R410A HVAC PRODUCTS TO HANDLE FLAMMABLE REFRIGERANTS
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United States of America Patent
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Issued Date -
Feb 17, 2022
app pub date -
Nov 1, 2021
filing date -
Nov 1, 2021
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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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