Evaporator core having biocidal fixture

Details Evaporator core having biocidal fixture Evaporator core having biocidal fixture

F - Mech Eng,Light,Heat,Weapons

28

F

257/24

F28F 7/00 (2006.01) B60H 1/32 (2006.01) F24F 13/00 (2006.01) F25B 47/00 (2006.01)

Patent

CA 2038655

C-4254 EVAPORATOR CORE HAVING BIOCIDAL FIXTURE Abstract of the Disclosure In a preferred embodiment of the invention, an evaporator core for an automotive air conditioning system or the like comprises a brazed plate-and-fin heat exchanger formed of aluminum alloy and having air passages opening at an upstream face. The evaporator core further comprises a biocidal fixture attached to the heat exchanger upstream face. The fixture comprises a carrier formed of an electrically nonconductive polymer and a metallic copper plate deposited on the surface of the carrier spaced apart from the heat exchanger. During air conditioning operations, condensate collecting on the copper surfaces reacts with the copper to generate cupric ions that disperse in the condensate to inhibit biological growth within the heat exchanger passages. Moreover, the carrier electrically, as well as physically, isolates the copper from the aluminum to prevent galvanic coupling that would otherwise produce accelerated corrosion of the heat exchanger.

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