Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Patent
1994-10-19
1997-07-22
Cuda, Irene
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
29890054, B23P 1526
Patent
active
056493614
ABSTRACT:
A method and apparatus provide a heat exchanger having a compression fitting for sealing connecting a refrigerant flow line to a tube brazed to the heat exchanger in a brazing furnace. The heat exchanger compression fitting includes a female tubing connector, a male tubing connector, a stainless steel washer, an annular seal member, and a rib formed integrally into the tube, spaced apart from an end of the tube to which the refrigerant flow line is to be connected. The male tubing connector is brazed to the refrigerant flow line. The female tubing connector and the stainless steel washer are placed on the tube between the rib and the end of the tube which is to be brazed to the heat exchanger, with the stainless steel washer between the rib and the female tubing connector.
The tube is then placed in a refrigerant port of the heat exchanger, and run through the brazing furnace with other heat exchanger components. The annular seal member is placed around the pilot portion of the tube, next to the rib. The female tubing connector and the male tubing connector are coupled together to squeeze the annular seal member between the rib, the pilot portion of the tube, and the male tubing connector. The stainless steel washer evenly distributes compressive loads over a side of the rib, and prevents galling and deformation of the rib as the female connector is rotated for coupling to the male tubing connector.
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Fukata Akio
Hindle Clive R.
Bradley James E.
Cuda Irene
Zexel USA Corporation
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