Process for producing flat heat exchange tubes

Details Process for producing flat heat exchange tubes Process for producing flat heat exchange tubes

1997-06-25

1999-09-07

Ryan, Patrick

Metal fusion bonding

Process

With supplementary mechanical joining

228183, 228265, B23K 3100, B23K 3102

Patent

active

059473657

ABSTRACT:
A process for producing a flat heat exchange tube having opposed upper and lower walls and a plurality of reinforcing walls connected by brazing between the respective upper and lower walls for dividing the tube interior into parallel fluid passages. In order to strengthen the brazed connection between the reinforcing walls and the lower surface of the upper wall and to prevent the creation of a clearance space therebetween, the lower surface of the upper wall is provided in advance with longitudinally extending ridges with which the upper surfaces of the reinforcing walls come in contact to eliminate the clearances and thus insure the existence of a continuous brazed connection between each reinforcing wall and lower surface of the upper wall.

REFERENCES:
patent: 5163602 (1992-11-01), Usui
Metals Handbook Ninth Edition, vol. 6, p. 1025, 1983.
European Patent Office Communication for European Patent Application No. 97110163.9 dated Oct. 15, 1997, along with European Search Report.
European Patent Office Patent Abstracts of Japan Appl. No. 0108657 Jul. 4, 1989, Pub No. 02290668 Nov. 30, 1998.
European Patent Office Patent Abstracts of Japan Appl. No. 63144266 Oct. 6, 1988 Pub. No. 0208452 Mar. 26, 1990.

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