Denso Corporation

Takahiro Nozaki

Yasutoshi Yamanaka

Hisashi Kobayashi

The wall thickness of at least a portion, which is plastically deformed, of a protruding portion used for calking is reduced to less than that of the other portions. Due to the foregoing, the bending rigidity of the protruding portion is decreased. Therefore, it is possible to bend (plastically deform) the protruding portion by a relatively low-intensity force. Accordingly, it is possible to easily execute the calking work (calking process) without the need to extend the length of the protruding portion (length from a forward end of the protruding portion to a bent portion). As a result, even if the pressure-withstanding property of an inter-cooler is enhanced by increasing the wall thickness of core plates, it is possible to prevent the calking workability from deteriorating and without increasing the size of the inter-cooler.

Heat exchanger

An extension of a core plate is brazed to an insert with the extension being held in a holding portion formed in the insert plate , and the width Wi of the extension is made to be substantially the same as the width Wc of the insert , whereby the retention of flux at longitudinal end portions of the core plate is made difficult. In addition, as a contact area between the extension and the insert can be made larger, the brazing of the extension and the insert can be ensured while the welding of a tank main body and the core plate can be facilitated.

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Anjo, Japan

Takahiro Nozaki