Manufacture of heat exchanging pipe provided with inner fin

Abstract

Abstract PURPOSE:To manufacture a heat exchanging pipe which is excellent in heat exchanging performance by inserting inner fins into a pipe material in which one or both of the upper and lower walls are shaped like a projecting arc, and whose section has a deformation preventing reinforced projecting part on the inside surface of at least one wall, pressing it, flattening the projecting arc-shaped surface, and adhering tightly it to the fin. CONSTITUTION:A deformation preventing reinforced projecting part 7 is provided on the center part of the inside surface of an upper wall 2 of an Al-made pipe material 1 in which one of the upper wall 2 and a lower wall 3 is shaped like a projecting arc and the other is a plane, or both of them have a projecting arc-shaped section. Two pieces of Al plate-made inner fins 5 whose section is a waveform, pressed and formed by a press, etc. in advance in this inside are inserted into both sides of the projecting part 7. Since the section of the pipe material 1 is shaped like a projecting arc, the inner fin is inserted easily. Subsequently, the wall surface of the projecting arc-shaped section is flattened by pressing it by a roll forming device, etc., by which the inner fin 5 and the upper and lower walls 2, 3 are adhered tightly to each other, and a heat exchanging pipe 6 provided with inner fins, which is excellent in heat exchanging characteristic is manufactured.

Inventors

• 👤 Yoichi Sato
• 👤 洋一 佐藤
• 👤 Ryo Hashimoto
• 👤 橋本　凉

Bibliographic Details