Method for manufacturing header pipe of heat exchanger

A method for manufacturing a header pipe of a heat exchanger, said header pipe being formed as a cylindrical shape with a plurality of connection holes thereon for receiving heat exchanger tubes and with at least one partition therein for turning head medium in said header pipe, the method comprising the steps of:

• forming at least one groove, into which the periphery of said at least one partition is to be inserted, on one surface of a planar raw plate by protruding a part of said planar raw plate from the other surface of said planar raw plate;
• bending said planar raw plate to have a U-shaped cross section defining a curved portion having an inner surface and opposed side portions each having a terminal end and an inner surface;
• opening said connection holes on the curved portion of said raw plate formed by said first-mentioned bending step;
• inserting said at least one partition having a periphery into said groove on the inner surface of the curved portion of said raw plate;
• and
• bending the side portions of said raw plate inward so that the terminal ends of the side portions are abutted to each other and the periphery of said at least one partition is inserted into said groove formed on the inner surfaces of the side portions of said raw plate.

A method for manufacturing a header pipe of heat exchanger, said header pipe being formed as a cylindrical shape with a plurality of connection holes thereon for receiving heat exchanger tubes and with at least one partition therein for turning a heat medium in said header pipe, the method comprising the steps of:

• bending a planar raw plate, defining an inner surface and an outer surface, to have a U-shaped cross section defining a curved portion having an inner surface and opposed side portions each having a terminal end and an inner surface;
• opening said connection holes on the curved portion of said raw plate formed by said first-mentioned bending step;
• forming at least one groove, into which the periphery of said at least one partition is to be inserted, on the inner surface of said raw plate by protruding a part of said raw plate from the outer surface of said raw plate;
• inserting said at least one partition having a periphery into said groove on the inner surface of the curved portion of said raw plate;
• and
• bending the side portions of said raw plate inward so that the terminal ends of the side portions are abutted to each other and the periphery of said at least one partition is inserted into said groove formed on the inner surfaces of the side portions of said raw plate.

A method for manufacturing a header pipe of heat exchanger, said header pipe being formed as a cylindrical shape with a plurality of connection holes thereon for receiving heat exchanger tubes and with at least one partition therein for turning a heat medium in said header pipe, the method comprising the steps of:

• bending a planar raw plate, defining an inner surface and an outer surface, to have a U-shaped cross section defining a curved portion having an inner surface and opposed side portions each having a terminal end and an inner surface;
• forming at least one groove, into which a periphery of said at least one partition is to be inserted, on the inner surface of said raw plate by protruding a part of said raw plate from the outer surface of said raw plate;
• opening said connection holes on the curved portion of said raw plate formed by said first-mentioned bending step;
• inserting said at least one partition having a periphery into said groove on the inner surface of the curved portion of said raw plate;
• and
• bending the side portions of said raw plate inward so that the terminal ends of the side portions are abutted to each other and the periphery of said at least one partition is inserted into said groove formed on the inner surfaces of the side portions of said raw plate.