The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 1991
Filed:
Aug. 27, 1990
James H Lindsay, Fenton, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
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 metallic copper plate deposited on the surface of the carrier spaced apart from the heat exchanger. During air conditioning operations, condensate collecting on the cooper 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, isolated the copper from the aluminum to prevent galvanic coupling that would otherwise produce accelerated corrosion of the heat exchanger.