HEAT EXCHANGER COATING

• US 20190331439A1
• Filed: 07/12/2019
• Published: 10/31/2019
• Est. Priority Date: 11/20/2013
• Status: Active Grant

• Current Assignee: Valeo Systemes Thermiques (Valeo SE)
• Original Assignee: Valeo Systemes Thermiques (Valeo SE)
• Inventors: Cazenave, Christian, Busson, Francois, Philippe, Maryse, Prevost, Jean Christophe
• Granted Patent: US 11,168,224 B2
• Time in Patent Office: Days
• CPC Class Codes: B60H 3/0092 in the interior of the HVAC unit, e.g. by spraying substances inside the unit
• CPC Class Codes: C08K 2003/2227 of aluminium
• CPC Class Codes: C09D 5/00 Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced electrically insulating plastics, resins or waxes H01B3/30; Filling pastes
• CPC Class Codes: C09D 5/08 Anti-corrosive paints
• CPC Class Codes: C09D 5/082 characterised by the anti-corrosive pigment
• CPC Class Codes: C09D 5/14 Paints containing biocides, e.g. fungicides, insecticides or pesticides C09D5/16 takes precedence
• CPC Class Codes: C09D 7/61 inorganic
• CPC Class Codes: C09D 7/65 macromolecular C09D7/41-C09D7/48 take precedence
• CPC Class Codes: F25B 39/00 Evaporators; Condensers
• CPC Class Codes: F25B 39/02 Evaporators
• CPC Class Codes: F25B 47/003 for preventing corrosion
• CPC Class Codes: F28F 19/02 by using coatings, e.g. vitreous or enamel coatings
• CPC Class Codes: F28F 19/04 of rubber; of plastics material; of varnish
• CPC Class Codes: F28F 19/06 of metal
• CPC Class Codes: F28F 21/084 from aluminium or aluminium alloys
• CPC Class Codes: F28F 2245/02 hydrophilic

Abstract

A heat exchanger for an air-conditioning circuit of a vehicle. The heat exchanger enables heat exchange between fluids and has a surfaces in contact with one of the fluids. The surface is formed from aluminum and/or from aluminum alloy. The surface is coated with an alumina layer and a reinforcing layer. The reinforcing layer includes an organic substance and a mineral substance. The organic substance includes at least one polymer and the mineral substance is capable of reacting with the aluminum in order to form an anticorrosion material.

Claims

1-11. -11. (canceled)

12. A process for manufacturing an exchanger for an air-conditioning circuit of a vehicle,

forming the exchanger with surfaces intended to come into contact with one of the fluids to be cooled, said surfaces being formed from aluminum and/or from aluminum alloy and coated with an alumina layer,

wherein said alumina layer is covered with a coating that reinforces the natural protection of the aluminum, said coating comprising a portion of organic substances comprising at least one polymer and a portion of mineral substances comprising at least one substance capable of reacting with the aluminum in order to form an anticorrosion material.

13. The process as claimed in claim 12, wherein said coating is dried.

14. The process as claimed in claim 12, wherein the pH of said coating is chosen from between 1.5 and 5.

15. The process as claimed in claim 12, wherein the coating comprises a reduced portion of fluoride of less than 1000 ppm.

16. The process as claimed in claim 12, wherein said coating is applied so that the amount of coating applied to the outer surface of said exchanger is between 15 and 20 ml/m².

17. The process as claimed in claim 12, wherein the heat exchanger is an evaporator.