Aluminum heat exchanger
AssigneeToyo Radiator Co., Ltd.
InventorTakazi Igami
Life of this patent
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Abstract
An aluminum-made heat exchanger including a flat tube is formed by, using an aluminum strip-shaped material coated with a brazing metal on the outer surface of a core metal and coated with a sacrificial anode material at the inner surface side thereof, bending the strip-shaped material in the width direction thereof, wherein many flat tubes are diposed parallel with each other and joined using a flux in a furnace. In order to provide the aluminum-made heat exchanger capable of being satisfactorily brazed and a high strength after brazing, the brazing metal is of an Al—Si alloy, core metal is an Al—Si alloy including Si of 0.4 to 1.2% by weight, and the sacrificial anode material is of an Al—Mg—Zn alloy including Mg of 0.3 to 0.75% by weight.
Claims2
An aluminum-made heat exchanger, comprising:
- a flat tube formed by, using an aluminum strip-shaped material of which core metal is coated with a brazing metal on the outer surface thereof and is coated with a sacrificial anode material on the inner surface thereof, bending the strip-shaped material in the width direction, many flat tubes are disposed parallel to each other to form a core of the heat exchanger, and each of these parts are fixed integrally by means of brazing,
- wherein the brazing metal is of an Al—Si alloy, the core metal is of an Al—Si alloy including Si of 0.4 to 1.2% by weight, the sacrificial anode material is of an Al—Mg‘3Zn alloy including Mg of 0.3 to 0.75% by weight, the aluminum-made heat exchanger is structured by being subjected to a brazing in a furnace using a flux for brazing to join the parts being interposed by the brazing metal.
Dependencies are inferred from the claim text.