HEAT EXCHANGER AND METHOD OF MANUFACTURING THE HEAT EXCHANGER

Title:

HEAT EXCHANGER AND METHOD OF MANUFACTURING THE HEAT EXCHANGER

Document Type and Number:

WIPO Patent Application WO/2002/100568

Kind Code:

A1

Abstract:

A heat exchanger, wherein a weld part (111a) is provided at a portion displaced from bent parts (111b) where stress concentration is liable to occur, whereby an excessive stress caused at the weld part when a tube is expanded can be suppressed and, since the stress produced at the weld part when the tube is expanded is prevented from surpassing the proof stress (allowable stress) of the weld part even if the proof stress (mechanical strength) of the weld part is lowered by the softening of the weld part at the time of welding, a weld tube can be used for a radiator formed by mechanically connecting tubes (111) to fins (112) by expanding the tubes, and the production cost of the tubes can be reduced less than that when seamless tubes are used for the tubes.

Inventors:

YAMAMOTO TETSUYA (JP)
KATO SEIICHI (JP)

Application Number:

PCT/JP2002/005628

Publication Date:

December 19, 2002

Filing Date:

June 06, 2002

Export Citation:

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Assignee:

DENSO CORP (JP)
YAMAMOTO TETSUYA (JP)
KATO SEIICHI (JP)

International Classes:

B21D39/06; B21D39/20; F28D1/03; F28F1/02; F28F1/32; (IPC1-7): B21D53/08; F28F1/32

Foreign References:

US4558695A	1985-12-17
JPH10185474A	1998-07-14
JPH0996496A	1997-04-08
JPH11320005A	1999-11-24
JPH09136160A	1997-05-27

Other References: