Method of manufacturing brazable pipes and heat exchanger
AssigneeShowa Alumina Kabushiki Kaisha
InventorsMitsuru Nobusue, Noboru Kodachi
Life of this patent
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Abstract
A process for producing brazeable pipes particularly for use in heat exchangers, the process comprising preparing a brazing sheet which comprises a core sheet coated with a brazing substance at least on one surface, forming a bulged portion of a semi-circular cross-section in the central section of the brazing sheet, providing apertures in the bulged portion for securing tube ends therein, and rolling the brazing sheet into a cylinder with its opposite ends being butt jointed to each other.
Claims8
A process for producing a heat exchanger or the like, the heat exchanger including a header, fins and tubes whose ends are connected to the header, the process comprising:
- preparing a brazing sheet which includes a core sheet coated with a brazing substance at least on one surface;
- forming a bulged portion in the brazing sheet, the bulged portion having a semi-circular cross-section;
- providing apertures in the bulged portion;
- rolling the brazing sheet into a cylinder to form a header, the opposite ends of the sheet being butt jointed to each other;
- providing a tube for each aperture;
- inserting the end of each tube into the corresponding aperture of the header;
- placing fins between adjacent tubes so as to fabricate a provisional assembly of the tubes, the fins and the header;
- and heating the provisional assembly in a brazing furnace to effect a permanent joint among the tubes, the fins and the header.
A process for producing brazeable pipes, the process comprising:
- preparing a brazing sheet which comprises a core sheet coated with a brazing substance at least on one surface, forming a bulged portion of a semi-circular cross-section in the brazing sheet, providing apertures in the bulged portion for insertion of tube ends, and rolling the brazing sheet into a cylinder with its opposite ends being butt jointed to each other.
A process for producing brazeable pipes, the process comprising:
- preparing a brazing sheet which comprises a core sheet coated with a brazing substance at least on one surface, forming a bulged portion of a semi-circular cross-section in the brazing sheet, providing apertures in the bulged portion for insertion of tube ends, rolling the brazing sheet into a cylinder with its opposite ends being butt jointed to each other, and covering at least one of the open ends of the rolled cylinder with a cap.
Dependencies are inferred from the claim text.