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 surface 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.
Claims13
A heat exchanger for an air-conditioning circuit of a vehicle, said heat exchanger enabling heat exchange between a first fluid and a second fluid and comprising:
- a surface in contact with at least one of said first fluid and said second fluid, said surface being formed from at least one material selected from the group consisting of aluminum and aluminum alloy,
- wherein said surface is coated with an alumina layer and a reinforcing layer,
- wherein said reinforcing layer comprises:
- an organic substance including 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 heat exchanger for an air-conditioning circuit of a vehicle, said heat exchanger enabling heat exchange between a first fluid and a second fluid and comprising:
- a first surface in contact with said first fluid and being formed from at least one material selected from the group consisting of aluminum and-aluminum alloy;
- and
- a second surface in contact with said second fluid and being formed from at least one material selected from the 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 regenerating said alumina layer, and
- wherein a first portion of said reinforcing layer covering the first surface has a thickness greater than the thickness of a second portion of said reinforcing layer covering the second surface.
A heat exchanger for an air-conditioning circuit of a vehicle, said heat exchanger enabling heat exchange between a refrigerant and an external air flow and comprising:
- a first surface in contact with said external air flow and being formed from at least one material selected from the group consisting of aluminum and-aluminum alloy;
- and
- a second surface in contact with said refrigerant and being formed from at least one material selected from the 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 regenerating said alumina layer, and
- wherein a first portion of said reinforcing layer covering the first surface in contact with said external air flow has 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.