| 摘要 |
An extension 123 of a core plate 121 is brazed to an insert 130 with the extension 123 being held in a holding portion 131 formed in the insert plate 130, and the width Wi of the extension 123 is made to be substantially the same as the width Wc of the insert 130, whereby the retention of flux at longitudinal end portions of the core plate 121 is made difficult. In addition, as a contact area between the extension 123 and the insert 130 can be made larger, the brazing of the extension 123 and the insert 130 can be ensured while the welding of a tank main body 122 and the core plate 121 can be facilitated. |
