PLATE-TYPE TUBULAR HEAT EXCHANGER Russian patent published in 1999 - IPC

FIELD: heat engineering. SUBSTANCE: heat exchanger includes collectors with inlet and outlet branch pipes and stack of plates. End plates form above-mentioned collectors together with covers. Each plate has row of beaded holes received by holes of adjacent plate, thus forming inner passages. Beads are made at angle of opening of 4 to 8 deg; their height exceeds distance between plates by three times. Ends of lap connections of plates are made in form of wavy line. Besides that, heat exchanger may have welded lap connections of plates or soldered connections of plates; leg lap weld may have varying height. EFFECT: enhanced operational reliability; facilitated manufacture. 4 cl, 5 dwg