US Patent 7107680 Manufacturing method of heat exchanger and structure thereof

Patent 7107680 was granted and assigned to Denso on September, 2006 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Denso

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

71076800

Patent Inventor Names

Naoki Ueda0

Date of Patent

September 19, 2006

Patent Application Number

108697260

Date Filed

June 16, 2004

Patent Primary Examiner

‌

Leonard R. Leo

Patent abstract

A first plate and a second plate have brazing paste on the surface thereof. When the first plate is combined with the second plate while an inner fin is disposed therein, a protrusion forms a clearance there between. Heat is added to evaporate the organic substances in the brazing paste. The organic substances vapor is discharged into outside of the tube through the clearance. After that, heat is added furthermore to melt the brazing paste. The first plate and the second plate are brazed together to form the tube and the inner fin is brazed to the inside of the tube.