Tube for heat exchanger

a technology of heat exchanger and tube, which is applied in the direction of manufacturing tools, soldering devices, light and heating equipment, etc., can solve the problem that the fluid flowing in the flat tube is likely to leak to the outside, and achieve the effect of improving the brazing performance of the bonded portion of the tube for a heat exchanger
US20130220585A1Inactive Publication Date: 2013-08-29DENSO CORP
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Patent Information

Authority / Receiving Office
US ยท United States
Patent Type
Applications(United States)
Current Assignee / Owner
DENSO CORP
Publication Date
2013-08-29
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

A cylindrical member of a tube for a heat exchanger is made of a pair of flat plate portions, and a pair of curved portions for connecting the pair of flat plate portions to each other. One of the pair of curved portions constructs a bonded portion in which an outer wall portion and an inner wall portion are bonded to each by brazing in a state where the outer wall portion and the inner wall portion overlap each other. The inner wall portion has a portion opposite to the outer wall portion put into close contact with the outer wall portion and is bonded to the one flat plate portion in a state where a tip end portion of the inner wall portion opposite to the one flat plate portion is separated from the one flat plate portion.
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Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This application is based on Japanese Patent Application No. 2010-252807 filed on Nov. 11, 2010, the contents of which are incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] The present invention relates to a tube for a heat exchanger, which can be usefully applied to, for example, a radiator of an automobile or the like.BACKGROUND ART

[0003] A flat tube formed by bending a plate-shaped part (for example, a metal plate) has been known as a tube for a heat exchanger. These flat tubes and corrugated fins are alternately stacked on each other to thereby form a heat exchange core, and a tank and piping for introducing a heat exchange medium are coupled to the heat exchange core, so that a heat exchanger is constructed.

[0004] This kind of flat tube is made of: a pair of flat plate portions which are opposite to each other with a given gap between them in a minor radius direction; a curved portion which is curved and connected to...

Claims

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