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US 8,037,930 B2Granted
Heat exchanger
AssigneeDenso Corporation
InventorsHaruhiko Watanabe, Yuuji Sako, Kyoujirou Nakata
Life of this patent
Estimating the term…
Abstract
A tube is composed of a first plate and a second plate which are opposed and engaged with each other. In a first region on both end sides of the tube, the first plate is formed into a shape in which an edge portion of the first plate is laid along a bent portion of the second plate so that an outer wall face of the tube forms a continuous face. In a second region of the tube, the first plate is formed into a shape in which the edge portion of the first plate is laid between the edge portion of the second plate and the bent portion of the second plate.
Claims6
A heat exchanger comprising:
- a tube defining a first and second engagement portion and a fin portion;
- an inner fin disposed within the tube;
- a first header plate disposed on a first side of the tube in a longitudinal direction of the tube, the first engagement portion of the tube being disposed within an opening defined by the first header plate;
- a second header plate disposed on a second side of the tube in the longitudinal direction of the tube, the second engagement portion of the tube being disposed within an opening defined by the second header plate;
- and
- an outer fin disposed only on an outer surface of the fin portion of the tube;
- wherein
- the tube is formed by a formed plate, an edge portion of the formed plate extending in the longitudinal direction of the tube is brazed to an outer surface of the formed plate;
- a circumferential position on the tube of an edge portion of the first and second engagement portions of the tube is different than a circumferential position on the tube of an edge portion of the fin portion of the tube;
- the edge portion of the first and second engagement portions defines a continuous face around an outer surface of the tube;
- and
- the edge portion of the fin portion is spaced from the outer fin.
9 more elements
Dependencies are inferred from the claim text.