Denso Corporation

Other

Hisashi Nakashima

Seiichi Kato

Sumio Susa

Shinichi Hamada

Shuji Komoda

Akio Ueda

Kouji Horie

Masakazu Hyodo

Fumio Moriyama

A recess portion for setting an attachment position is formed in each plate fin at positions adjacent to both longitudinal ends of the plate fins on both upstream and downstream ends in an air flowing direction. Therefore, air passing through the plate fins is disturbed by a standing wall portion of the recess portion around the longitudinal ends of the plate fins. Thus, it can prevent a thermal boundary layer from being expanded in a heat exchanger having the plate fin, and heat-transmission efficiency can be improved in the heat exchanger. As a result, an entire area of the plate fin can be effectively used, thereby improving heat-exchanging capacity of the heat exchanger.

Plate-fin type heat exchanger and method for manufacturing the same

A heat exchanger has a tank for accommodating a heat medium therein and a tube connected to the tank through a core plate. Specifically, an end portion of the tube is inserted into a connection hole of the core plate and is mechanically joined thereto. A joined portion of the tube and the core plate is covered with adhesive through a wettability improving film for improving wettability of the adhesive to the joined portion. As a result, a sealing property between the tube and the core plate is easily and stably improved by the adhesive.

Heat exchanger having tube joined to core plate and method of manufacturing the same

A heat exchanger has a core portion composed of several pairs of first and second plates laminated with and brazed to one another. Each of the first and second plates is composed a core member, a brazing filler layer formed on a surface of the core member, and a sacrifice layer formed on the other surface of the core member. For instance, to form a pair of the first and second plates, the first plate is formed with a convex portion with an opening portion, and a burring portion of the second plate is inserted into the opening portion and is plastically deformed such that the sacrifice layer of the second plate closely contacts the brazing filler metal layer of the first plate. Then the first and the second plates are brazed together.

Aluminum-made heat exchanger with brazed joint portion

In a mechanically assembled type heat exchanger, in which an end portion of an oval tube is inserted into a barring hole of a core plate and expanded to be press fit to the core plate. Then adhesive is potted on the core plate for sealing the press fit portion in the end of the tube. A reinforcing member is formed around the barring hole for increasing the rigidity of the core plate so as to improve the durability of sealing.

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Kariya, Japan

Hisashi Nakashima