Heat exchanger coating
AssigneeValeo Systemes Thermiques
InventorsChristian Casenave, François Busson, Maryse Philippe, Jean-Christophe Prevost
Life of this patent
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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.
Claims8
A process for manufacturing an exchanger for an air-conditioning circuit of a vehicle,
- forming the exchanger with a surface in contact with at least one of a first fluid and a second fluid,
- said surface being formed from at least one selected from a group consisting of aluminum and aluminum alloy,
- wherein said surface is coated with an alumina layer and a coating,
- wherein said coating comprises:
- an organic substance comprising at least one polymer;
- and
- a mineral substance capable of reacting with the aluminum to form an anticorrosion material, and
- wherein said mineral substance capable of reacting with the aluminum allows for regeneration of the alumina layer coated on said surface.
A process for manufacturing an exchanger for an air-conditioning circuit of a vehicle, said heat exchanger enabling heat exchange between a first fluid and a second fluid, the process comprising:
- forming the exchanger with a first surface in contact with said first fluid and being formed from at least one selected from a group consisting of aluminum and-aluminum alloy;
- and
- further forming the exchanger with a second surface in contact with said second fluid and being formed from at least one selected from a group consisting of aluminum and aluminum alloy,
- wherein said first surface and said second surface are opposite surfaces of a face in the heat exchanger and are coated with an alumina layer and a reinforcing layer,
- wherein said reinforcing layer comprises a mineral substance capable of regeneration of said alumina layer, and
- wherein a first portion of said reinforcing layer covering the first surface having a thickness greater than the thickness of a second portion of said reinforcing layer covering the second surface.
A process for manufacturing an exchanger for an air-conditioning circuit of a vehicle, said heat exchanger enabling heat exchange between a refrigerant and an external air flow, the process comprising:
- forming the exchanger with a first surface in contact with said external air flow and being formed from at least one selected from a group consisting of aluminum and aluminum alloy;
- and
- further forming the exchanger with a second surface in contact with said refrigerant and being formed from at least one selected from a group consisting of aluminum and aluminum alloy,
- wherein said first surface and said second surface are coated with an alumina layer and a reinforcing layer,
- wherein said reinforcing layer comprises a mineral substance capable of regeneration of said alumina layer, and
- wherein a first portion of said reinforcing layer covering the first surface in contact with said external air flow having a thickness greater than the thickness of a second portion of said reinforcing layer covering the second surface in contact with said refrigerant.
Dependencies are inferred from the claim text.