Soldered aluminum heat exchanger

Inactive Publication Date: 2012-11-22
BEHR GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]It is therefore an object of the present invention to create soldered aluminum heat exchangers with an increased resistance to corrosion on the coolant side while also avoiding the disadvantages known from the prior art, which heat exchangers have a long service life and are simple to manufacture.
[0015]For example, platings can be made far thicker than galvanic coatings, and also have continuous, homogeneous surfaces. In addition, a significant increase in hot gas corrosion resistance can be achieved.
[0022]Even very small additions of the alloy elements magnesium, silicon, copper, zinc, or manganese change the properties of the pure aluminum very greatly. In particular, strength and hardness are increased and electric conductivity is reduced while workability is decreased only slightly.
[0029]As a result of the lighter-weight heat exchangers, the fuel consumption of motor vehicles can be reduced. In comparison to laser welding, the heat exchangers produced using the soldering process are more economical and permit higher, throughput numbers.

Problems solved by technology

It is a disadvantage in the manufacture of prior art aluminum heat exchangers made from aluminum tubes with a zinc-containing protective plating on the inside, however, that soldering of the inside is no longer possible.

Method used

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  • Soldered aluminum heat exchanger
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Experimental program
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Embodiment Construction

[0036]FIG. 1 shows the schematically represented four-layer construction of a tube 1 to create a soldered aluminum heat exchanger.

[0037]The tube 1 is made of a core material 2 and an aluminum-containing protective plating 3 on the inside of the core material 2. In addition, an inside solder plating 4 is provided on the protective plating 3, and an outside solder plating 5 is provided on the outside 6 facing away from the coolant side of the tube 1.

[0038]FIG. 2 shows a schematically represented first tube geometry in cross-section. The tube 7 here is implemented as a welded, crimped tube. The crimp 8 can be produced manually or by machine, and forms a groove-like recess 9 in the tube 7, which serves primarily to increase stiffness.

[0039]FIG. 3 shows a schematically represented second tube geometry in cross-section. The tube 10 here is implemented as a soldered, crimped tube. The crimp 11 can be produced manually or by machine, and forms a groove-like recess 12 in the tube 10, which s...

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Abstract

A soldered aluminum heat exchanger, having tubes made of a core material through which tubes a coolant flows, and the tubes being connected to at least one header by means of an inner soldered joint; having a protective plating on the inner face of the core material comprising aluminum and using four-layer technology; having an inner solder plating on the protective plating; and having an outer solder plating on the outer face of the tube facing away from the coolant face.

Description

[0001]This nonprovisional application is a continuation of International Application No. PCT / EP2010 / 068010, which was filed on Nov. 23, 2010, and which claims priority to German Patent Application No. DE 10 2009 055 608.7, which was filed in Germany on Nov. 25, 2009, and which are both herein incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to soldered aluminum heat exchangers.[0004]2. Description of the Background Art[0005]Tubes are among the components used for manufacturing soldered aluminum heat exchangers. The tubes may be welded, folded, and subsequently soldered, or may also be extruded.[0006]DE 102005059717 A1, which is incorporated herein by reference, discloses a device for exchanging heat between an acidic gas and a heat exchange medium, having at least one flow passage for the acidic gas that is made substantially of aluminum and / or an aluminum alloy.[0007]DE 1677069 B concerns a method for manufacturing from...

Claims

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Application Information

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IPC IPC(8): F28F19/06
CPCB23K1/0012B23K35/0238B23K35/286B23K2201/14F28F21/089B23K2203/10F28F19/06F28F21/084B23K2203/08B23K2101/14B23K2103/10
InventorTRAUB, MATTHIASGRUENENWALD, BERNDEILEMANN, ANDREASGOERDELER, MATTHIASTUERPE, MATTHIAS
OwnerBEHR GMBH & CO KG