F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
F28F 3/04 (2006.01) B23P 15/26 (2006.01) F28D 1/03 (2006.01) F28F 13/08 (2006.01)
Patent
CA 2309240
A heat exchanger is constructed by tubes (11), corrugated fins (14) and head pipes (12, 13), which are assembled together. Herein, the tube is constructed by bending a flat plate (20) whose surfaces are clad with brazing material to form a first wall (21) and a second wall (22), which are arranged opposite to each other with a prescribed interval of distance therebetween to provide a refrigerant passage (23). Before bending, a number of swelling portions (25) are formed to swell from an interior surface of the flat plate by press. By bending, the swelling portions are correspondingly paired in elevation between the first and second walls, so their top portions (25a) are brought into contact with each other to form columns (26) each having a prescribed sectional shape corresponding to an elliptical shape or an elongated circular shape each defined by a short length (d1) and a long length (d2). The columns are arranged to align long lengths thereof in a length direction (A) of the tube corresponding to a refrigerant flow direction such that obliquely adjacent columns, which are arranged adjacent to each other obliquely with respect to the length direction of the tube, are arranged at different locations and are partly overlapped with each other with long lengths thereof in view of a width direction (B) perpendicular to the length direction of the tube. The tubes, corrugated fins and head pipes are assembled together and are then placed into a heating furnace to heat for a prescribed time.
Inoue Masashi
Iokawa Hiroshi
Kotou Hiroyuki
Nakado Koji
Suzuki Atsushi
Goudreau Gage Dubuc
Mitsubishi Heavy Industries Ltd.
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