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Solderable fluid channel for a heat exchanger of aluminium

A technology of fluid channels and heat exchangers, applied in the direction of heat exchanger fixation, heat exchange equipment, indirect heat exchangers, etc., can solve the problem of damaging the cooling medium of the motor

Active Publication Date: 2013-04-03
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to modern concepts, it is easy to imagine that if the concentration of solder components in the cooling medium is too high, it will damage the surrounding motor cooling medium, for example.

Method used

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  • Solderable fluid channel for a heat exchanger of aluminium
  • Solderable fluid channel for a heat exchanger of aluminium
  • Solderable fluid channel for a heat exchanger of aluminium

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0037] The fluid channel shown in FIG. 1 is formed as a flat tube formed from a single sheet metal 1 . The metal sheet 1 consists of an aluminum alloy, which here has a magnesium content. In this case (but not necessarily), at least on the outer surface 2 the core region of the metal sheet is coated with a flux coating. For this and all other embodiments, the following alloys are preferred (all The expressions are weight-%):

[0038] Core area / basic material of sheet metal:

[0039]

[0040] Solder cladding:

[0041]

[0042]

[0043] The flat tube is designed here as a multi-chamber flat tube with two folded webs 4 and connection grooves 5 for closing the tube in the longitudinal direction.

[0044] The connection groove 5 is arranged here on the broad side of the flat tube. It contains a first socket section 5 a and a second socket section 5 b , which are each formed by bending the opposite edge regions of the sheet metal 1 by 90°. The flanges 6 are each conne...

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Abstract

The invention relates to a fluid channel for a heat exchanger, comprising a metal sheet (1), wherein the metal sheet (1) has at least one core region of an aluminium base alloy and at least one structure (4, 14) arranged inside the fluid channel, wherein the structure (4, 14) lies against a surface (3) of the metal sheet and can be soldered to the metal sheet in a flux-free manner by way of a first soldering location in a soldering operation, and wherein a soldering region (5a, 5b, 7, 12, 13) of the metal sheet and a counterpart (5a, 5b, 7, 12, 13) lie against one another and can be soldered to one another in the same soldering operation as a second soldering location while wetting with flux, wherein an open path between the two soldering locations exists before the soldering operation.

Description

technical field [0001] The invention relates to a fluid channel for a heat exchanger according to the preamble of claim 1 . Background technique [0002] In the construction of heat exchangers, in particular for motor vehicles, there is an increasing demand that as little flux waste as possible be produced during the brazing process. According to modern concepts, it is easy to imagine that if the concentration of the solder component in the cooling medium is too high, damage to the surrounding motor cooling medium can occur, for example. [0003] EP 0 781 623 B1 describes a method for producing an aluminum heat exchanger in which welded flat tubes are used. In this case, the inside of the coolant-carrying flat tube is soldered without solder, wherein the shaped bead is connected to the opposite tube wall to form a support wall, or the inner parts inserted into the tube are soldered without solder. The outer wall of the flat tube is conventionally covered with solder, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K1/00B23K1/20B21D53/02F28F21/08F28D9/00B23K101/14
CPCB23K1/0012F28F21/084B21C37/14F28F2275/06B23K35/286F28D1/0391B21C37/225B21C37/151F28F21/08B23K2201/14B23K1/203B23K2101/14F28F1/022
Inventor 彼得·恩勒特贝恩特·格吕嫩瓦尔德沃克·库茨
Owner MAHLE INT GMBH
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