Heat exchanger and method of producing the same

Details Heat exchanger and method of producing the same Heat exchanger and method of producing the same

1998-01-15

1999-11-09

Lazarus, Ira S.

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

165174, 165176, 165179, 165183, 2989005, F28F 100

Patent

active

059790512

ABSTRACT:
A heat exchanger that a tube member 2' has beads 21 protruded from the face of one plate toward the other plate, tube member 2' is held by block members 31, 31, a forming jig 40 is inserted between medium passages 24, 24 formed by the beads 21 to hold to press the beads 21 at an end 2a of the tube member 2' to mutually adhere the faces of the beads 21 on the outer face of the tube member 2', and recesses formed by the mutually contacted faces of the beads 21, 21 have a cross-sectional area of about 0.2 mm.sup.2 or below. And, a region where the recesses have a cross-sectional area of about 0.2 mm.sup.2 or below is within 10 mm outside header pipes 3, 4.

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