B - Operations – Transporting – 23 – P
Patent
B - Operations, Transporting
23
P
26/146
B23P 15/26 (2006.01) B21D 53/08 (2006.01) B23P 19/02 (2006.01) F28F 1/32 (2006.01) F25B 39/02 (2006.01)
Patent
CA 1252272
ABSTRACT OF THE DISCLOSURE A method of manufacturing a fin-tube heat exchanger which includes a multiplicity of plate fins arranged in a plural- ity of rows disposed at a predetermined pitch in the direction of air flow, and a jointless refrigerant pipe extending through the plate fins in a zigzag manner. Pipe-receiving holes are formed in each plate fin in an offset manner relative to the center of the plate fin. The plate fins are then placed in fin-receiving grooves formed in a straight fin positioning fixture at predeter- mined spacings such that the same longitudinal ends of the plate fins of alternating rows appear on the same side of the fin posi- tioning fixture and such that the pipe-receiving holes are lin- early aligned. The refrigerant pipe is inserted into the pipe- receiving holes and is expanded to make tight and close contact with the plate fins. The refrigerant pipe is bent in a zigzag manner so that the straight portions of the pipe occupy corners of rectangles and so that a predetermined spacing is provided between the opposite ends of the plate fins of adjacent rows. Finally, a twist is imparted to the refrigerant pipe to line up the plate fins and arrange the pipe such that the straight por- tions of the pipe are positioned in a staggered manner, as viewed in the direction of the rows.
448930
Aoki Yukichi
Aoyama Shigeo
Ito Hironori
Koma Hachiro
Tanno Satoshi
Marks & Clerk
Matsushita Refrigeration Company
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