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    • 5. 发明申请
    • Low Pressure Drop, Low NOx, Induced Draft Gas Heaters
    • 低压降,低NOx,引风气加热器
    • US20110311924A1
    • 2011-12-22
    • US13166361
    • 2011-06-22
    • William ProsciaScott A. LiljenbergWilliam J. RoyDuane C. McCormickChristopher T. Chipman
    • William ProsciaScott A. LiljenbergWilliam J. RoyDuane C. McCormickChristopher T. Chipman
    • F23D14/58F23D14/04F23D14/70F23C6/00
    • F23D14/04F23D2210/00F23M20/005
    • An improved induced draft gas burner assembly (31, 131, 231, 331, 431, 531, 631) for low NOx residential and light commercial gas furnaces (10, 10a) is disclosed. The improved burner includes an upstream assembly coupled to a fuel inlet (55) and an air inlet (43). The air inlet (43) is coupled to a neck (41, 141, 241, 341, 441, 541, 641) extending between the air inlet (43) and the outlet of the neck (41, 141, 241, 341, 441, 541, 641), both of which may be disposed within an optional chamber (42, 142, 242, 342, 442). If used, such a chamber (42, 142, 242, 342, 442) also includes an outlet coupled to a burner (46, 146, 246, 346, 546, 646). In practice, the chamber (42, 142, 242, 342, 442) and neck (41, 141, 241, 341, 441, 541, 641) behave as a Helmholtz resonator that can be tuned to provide an upstream impedance Zup that exceeds the downstream impedance Zdown of the components downstream of the burner assembly (31, 131, 231, 331, 431, 531, 631). The volume of the chamber (42, 142, 242, 342, 442), the length and cross-sectional area and shape or geometry of the neck (41, 141, 241, 341, 441, 541, 641) provide convenient variables for manipulating Zup and stabilizing the flame. Various configurations of the neck (41, 141, 241, 341, 441, 541, 641) may be use to provide a sufficient volume thereby eliminating the need for the chamber (42, 142, 242, 342, 442).
    • 公开了一种用于低NOx住宅和轻型商业燃气炉(10,10a)的改进的引风通风炉燃烧器组件(31,131,231,331,431,531,631)。 改进的燃烧器包括联接到燃料入口(55)和空气入口(43)的上游组件。 空气入口(43)联接到在空气入口(43)和颈部(41,141,241,341,441)的出口之间延伸的颈部(41,141,241,341,441,541,641) ,541,641),它们都可以设置在任选的室(42,142,242,342,442)内。 如果使用,这样的室(42,142,242,342,442)还包括连接到燃烧器(46,146,246,346,546,646)的出口。 在实践中,室(42,142,242,342,442)和颈部(41,41,241,341,441,541,641)表现为亥姆霍兹共振器,其可被调谐以提供超过的上游阻抗Zup 在燃烧器组件(31,131,231,331,431,531,631)下游的部件的下游阻抗Zdown。 腔室(42,142,242,342,442)的体积,颈部(41,141,241,341,441,541,641)的长度和横截面积以及形状或几何形状为 操纵Zup并稳定火焰。 可以使用颈部(41,141,241,341,441,541,641)的各种构造来提供足够的体积,从而消除对腔室(42,142,242,342,442)的需要。