Heat exchanger and method of manufacturing the same

a technology of heat exchanger and heat exchanger body, which is applied in the direction of manufacturing tools, soldering devices, light and heating equipment, etc., can solve the problems of fluid leakage from the heat exchanger, easy to occur joint defects, etc., and achieve the effect of enhancing the joint reliability of the tub
US20060086491A1Inactive Publication Date: 2006-04-27DENSO CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
DENSO CORP
Publication Date
2006-04-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

A heat exchanger includes at least one tube provided with an inner fin in a fluid passage which is defined by the tube therein and has a substantially ellipse-shaped cross section. A plate member for constructing the tube has two edge portions, which overlap each other and are integrally joined at a single joint disposed at a major-axis direction end of the tube. The inner fin is arranged in the tube before the forming of the joint, thus improving an arrangement performance of the inner fin. Moreover, there exists the single joint positioned at the one end of the tube so that a joint reliability of the tube is enhanced.
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Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This application is based on a Japanese Patent Application No. 2004-309939 filed on Oct. 25, 2004, the disclosure of which is incorporated herein by reference. FIELD OF THE INVENTION

[0002] The present invention relates to a heat exchanger and a method of manufacturing the heat exchanger, in which a tube is provided with an inner fin therein. BACKGROUND OF THE INVENTION

[0003] Generally, an inner fin can be arranged in a tube of a heat exchanger, for example, referring to JP-2003-28586A. In the manufacture of the heat exchanger, a pair of plates having a substantially ⊃-shaped cross section are confronted with each other to be engaged, while the inner fin is positioned therebetween. Thereafter, a joining of the two plates and a joining of the inner fin to the two plates are performed by brazing through a brazing material paste, which is applied to surfaces of the two plates. Thus, the tube in which the inner fin is joined to an inner sur...

Claims

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