Heat exchanger plate

Abstract

In a heat exchanger plate, machine time required for processing can be shortened, production costs can be reduced, and a penetration bead of a weld can be prevented from intruding into a flow channel, thereby preventing the weld from deforming a cover section. The heat exchanger plate comprises: a flat main body on a surface of which is formed at least one first groove having a rectangular cross-sectional shape; and a cover which has substantially the same shape as the first groove in plan view and which is formed such that when embedded in the first groove, a rear face thereof contacts a bottom of the first groove and opposite side faces thereof contact opposite side faces of the first groove, and a surface thereof is substantially flush with that of the main body, wherein there is provided a second groove formed extending along the opposite side faces at a center of the rear face, and the cover is joined to the main body by friction stir welding.

1 . A heat exchanger plate comprising:
 a flat main body on a surface of which is formed at least one first groove having a rectangular cross-sectional shape; and   a cover which has substantially the same shape as said first groove in plan view and which is formed such that when embedded in said first groove, a rear face thereof contacts a bottom of said first groove and opposite side faces thereof contact opposite side faces of said first groove, and a surface thereof is substantially flush with that of said main body,   wherein there is provided a second groove formed extending along said opposite side faces at a center of said rear face, and said cover is joined to said main body by friction stir welding.   
   
   
       2 . A heat exchanger plate comprising:
 a flat main body on a surface of which is formed at least one first groove having a rectangular cross-sectional shape; and   a flat cover which covers an entire surface of said main body, and on a rear face of which is formed a protrusion whose top face contacts a bottom of said first groove and whose opposite side faces contact opposite side faces of said first groove, when the cover is superposed on the surface of said main body,   wherein there is provided a second groove formed extending along said opposite side faces at a center of said top face, and said cover is joined to said main body by friction stir welding.