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    • 2. 发明授权
    • Recuperative heating system
    • 回热加热系统
    • US4047490A
    • 1977-09-13
    • US720671
    • 1976-09-07
    • Vincent Galluzzo
    • Vincent Galluzzo
    • F24B7/00F23L15/04
    • F24B7/005
    • A recuperative heating system has a heat conductive chimney flue; a fuel combustion chamber exhausting hot waste gases and smoke upwardly through the flue; coaxial ducts about the flue, defining a fresh air flow path downwardly from a cool air intake along the outer duct and upwardly along the inner duct into direct heat exchange relationship with the outer surface of the flue and exhausting outwardly from the inner duct into a warm air room vent; and a plurality of U-shaped conduit tubes, each having its bight within the flue. The legs of each U-shaped tube are of different lengths with the inlet end on the longer leg opening into the outer duct and the outlet end on the shorter leg opening into the inner duct.
    • 回热加热系统具有导热烟道; 燃料燃烧室排出热废气并向上通过烟道; 围绕烟道的同轴管道,沿着外部管道从冷空气入口向下限定新鲜空气流动路径,并沿着内部管道向上并向与烟道的外表面直接热交换关系,并从内部管道向外排出为暖气 空气通风口; 以及多个U形导管,各自在烟道内具有其弯曲。 每个U型管的腿部具有不同的长度,较长的腿部上的入口端部进入外部管道,而较短的腿部的出口端部进入内部管道。