| 摘要 |
PURPOSE:To reduce the fluidic resistance of combustion gas as well as to improve the extent of heat exchanger effectiveness ever so better, by forming a tube into flatness as well as bending it into U-shaped form, and dislocating each tube part on both inner and outer circumferential sides, while installing each radiator plate between each of tubes themselves at these inner and outer circumferential sides. CONSTITUTION:A tube 11 is formed into flatness and sets the long diameter in a flow direction of hot combustion gas, while it is bent into U-shaped form and set up tubularly in an upper part of a cylinder. And, a tube part 112 at the inner circumferential side and a tube part 113 at the outer circumferential side in the said tube 11 are dislocated as far as an angle theta in the circumferential direction from the center of the said tube with each other, while each of radiator plates 12 and 13 is installed between these tubes 112 and 113 themselves. In addition, the radiator plate 12 is extended up to the vicinity of a long diameter position of the tube part 113 at the outer circumferential side, and the radiator plate 13 is extended up to the vicinity of a long diameter position of the tube part 112 at the inner circumferential side. Furthermore, the hot combustion gas G is made to flow toward the tube part 113 at the outer circumferential side from the tube part 112 at the inner circumferential side. |
