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1. 发明授权

US5406933A High efficiency fuel-fired condensing furnace having a compact heat exchanger system 失效
标题翻译：具有紧凑型热交换器系统的高效燃油冷凝炉
公开(公告)号：US5406933A
公开(公告)日：1995-04-18
申请号：US210056
申请日：1994-03-16
申请人： Lin-Tao Lu
发明人： Lin-Tao Lu
IPC分类号： F24H3/08 , F24H8/00 , F24H3/02
CPC分类号： F24H3/087 , F24H8/00 , Y02B30/102
摘要： A tubular recuperative heat exchanger structure is mounted in a housing chamber within a fuel-fired condensing furnace in the vertical flow path of supply air being flowed through the housing by a blower. The heat exchanger structure comprises a primary heat exchanger defined by a vertically serpentined series of combustor tubes into open inlet ends of which a series of inshot-type fuel burners flow flames and hot combustion gases, and a secondary heat exchanger formed from a horizontally extending series of finned heat exchanger tubes having inlets in flow communication with the outlets of the combustor tubes and outlets in flow communication with the inlet of a draft inducer fan. The firing rate of the furnace is correlated to the configuration and relative geometries of the primary and secondary heat exchanger tubes in a manner making the overall heat exchanger highly compact and thermally efficient in addition to reducing air blower and draft inducer electrical consumption as well as reducing the operating noise of the furnace.
摘要翻译：管式回热换热器结构安装在燃料冷凝炉内的容纳室中，供应空气的垂直流动路径通过鼓风机流过壳体。热交换器结构包括由垂直蛇形的一系列燃烧器管限定的主热交换器，其开口的入口端，一系列喷射式燃料燃烧器流动火焰和热燃烧气体，以及由水平延伸的系列形成的二次热交换器翅片式热交换器管具有与引风机风扇的入口流动连通的与燃烧器管和出口的出口流动连通的入口。炉子的燃烧速率与一次和二次热交换器管的结构和相对几何形状相关，使总体热交换器除了减少鼓风机和牵引电机的电耗以及还原炉的操作噪音。

2. 发明授权

US5649529A Low NO.sub.x combustion system for fuel-fired heating appliances 失效
标题翻译：燃油加热设备的低NOx燃烧系统
公开(公告)号：US5649529A
公开(公告)日：1997-07-22
申请号：US542194
申请日：1995-10-12
申请人： Lin-Tao Lu , Larry R. Mullens , Keith M. Grahl
发明人： Lin-Tao Lu , Larry R. Mullens , Keith M. Grahl
IPC分类号： F23M9/06 , F24H3/08 , F24H9/18 , F24H3/00
CPC分类号： F24H3/087 , F23M9/06 , F24H9/1881
摘要： A fuel-fired, forced air, draft induced heating furnace is provided with NOx reduction apparatus associated with a plurality of combustor tubes forming a portion of its heat exchanger structure. In-shot type fuel burners are spaced apart from and face the open inlet ends of horizontal combustion sections of the combustor tubes. The NOx reduction apparatus includes a plurality of metal mesh tubes having diameters substantially less than the internal diameters of the combustion tubes. Each metal mesh tube is coaxially anchored to and telescopingly over the outlet end of one of the burners and extends therefrom coaxially into the associated combustion tube. During burner operation the burner flames injected into the combustor tubes are forced through the mesh tubes which operate to laterally reduce the cross-sections of the flames, increase their axial velocity through the combustor tubes, and substantially diminish the intimate contact of secondary combustion air with the maximum temperature zones of the flames within the combustor tubes.
摘要翻译：燃料燃烧的强制空气，引风加热炉具有与形成其热交换器结构的一部分的多个燃烧器管相关联的NOx还原装置。喷射型燃料燃烧器与燃烧器管的水平燃烧部分的开放入口端相隔开并面对。 NOx还原装置包括多个金属网管，其直径基本上小于燃烧管的内径。每个金属网管同轴地锚固并且可伸缩地在一个燃烧器的出口端上并且从其同轴地延伸到相关联的燃烧管中。在燃烧器操作期间，喷射到燃烧器管中的燃烧器火焰被迫通过网管，其操作以横向减小火焰的横截面，增加其通过燃烧器管的轴向速度，并且基本上减少二次燃烧空气与燃烧器管内火焰的最高温度区。

3. 发明授权

US5178124A Plastic secondary heat exchanger apparatus for a high efficiency condensing furnace 失效
标题翻译：用于高效率冷凝炉的塑料二次换热装置
公开(公告)号：US5178124A
公开(公告)日：1993-01-12
申请号：US744076
申请日：1991-08-12
申请人： Lin-Tao Lu , Ali Shenasa , Diane M. Jakobs , Gallen W. Stokes
发明人： Lin-Tao Lu , Ali Shenasa , Diane M. Jakobs , Gallen W. Stokes
IPC分类号： F24H3/10 , F24H8/00 , F28F9/26 , F28F21/06
CPC分类号： F28F21/065 , F24H3/105 , F24H8/00 , F28F9/26 , F28F2265/26 , Y02B30/102
摘要： A high efficiency fuel-fired condensing furnace is provided with a compact recuperative heat exchanger structure comprising a metal primary heat exchanger positioned above and operatively connected to the inlet side of a secondary heat exchanger formed from a polyetherimide (PEI) plastic material. The primary heat exchanger is formed from a horizontally spaced series of vertically serpentined metal combustor tubes, and the second heat exchanger if formed from horizontally spaced apart injection molded inlet and outlet collector boxes interconnected by a horizontally spaced series of elongated hollow extruded plate members sealingly secured at their opposite ends to the collector boxes with the side edge-to-side edge widths of the hollow plate members being vertically oriented. The outlet ends of the metal tubes are operatively connected to the plastic inlet collector box. Cross-sectionally along their lengths, the hollow plastic plate members have horizontally flattened portions interdigitated with horizontally enlarged, convexly curved poritons. Various heat transfer-enhancing alternate embodiments of the hollow plate members are disclosed. Additionally disclosed is an alternate embodiment of the plastic secondary heat exchanger in which the inlet collector box is positioned atop the outlet collector box, and the hollow plate members are internally baffled in a manner causing combustion gas exiting the inlet collector box to make two passes through the hollow plate members before entering the outlet collector box.
摘要翻译：一种高效燃料冷凝式冷凝炉具有紧凑的换热器热交换器结构，其包括位于由聚醚酰亚胺（PEI）塑料材料形成的二次热交换器的入口侧上方并可操作地连接的金属一次热交换器。主要热交换器由水平间隔开的一系列垂直蛇形金属燃烧器管形成，第二热交换器如果由水平间隔开的注射成型的入口和出口收集器盒形成，通过水平间隔的一系列细长的中空挤压板构件相互密封地密封在其相对的两端到收集箱，中空板构件的侧边缘到边缘宽度垂直定向。金属管的出口端可操作地连接到塑料入口收集箱。横截面沿着它们的长度，中空的塑料板构件具有水平的扁平部分，其与水平放大的凸形弯曲的窗口相互交错。公开了中空板构件的各种传热增强替代实施例。另外公开了塑料二次热交换器的替代实施例，其中入口收集箱位于出口收集箱的顶部，并且中空板构件以使得从入口收集箱离开的燃烧气体的方式在内部被挡板以使两次通过中空板构件进入出口收集箱前。

4. 发明授权

US5370529A Low NO.sub.x combustion system for fuel-fired heating appliances 失效
标题翻译：燃油加热设备的低NOx燃烧系统
公开(公告)号：US5370529A
公开(公告)日：1994-12-06
申请号：US111297
申请日：1993-08-24
申请人： Lin-Tao Lu , Larry R. Mullens , Keith M. Grahl
发明人： Lin-Tao Lu , Larry R. Mullens , Keith M. Grahl
IPC分类号： F23D14/70 , F24H3/06 , F23D14/62 , F24H9/00
CPC分类号： F24H3/065 , F23D14/70 , F23C2900/07022
摘要： A fuel-fired, forced air draft induced heating furnace is provided with NO.sub.x reduction apparatus associated with a plurality of combustor tubes forming a portion of its heat exchanger structure. In-shot type fuel burners are spaced apart from and face the open inlet ends of horizontal combustion sections of the combustor tubes. The NO.sub.x reduction apparatus includes a plurality of metal mesh tubes having diameters substantially less than the internal diameters of the combustion tubes. The mesh tubes are coaxially supported within the combustor tubes, adjacent their inlet ends, by elongated support members longitudinally passing through the mesh tubes and having first ends anchored to the combustor tube inlet ends, and second ends slidably resting on internal side surface portions of the combustor tubes. During burner operation the burner flames injected into the combustor tubes are forced through the mesh tubes which operate to laterally reduce the cross-sections of the flames, increase their axial velocity through the combustor tubes, and substantially diminish the intimate contact of secondary combustion with the maximum temperature zones of the flames within the combustor tubes.
摘要翻译：燃料燃烧的强制通风引风加热炉设置有与形成其热交换器结构的一部分的多个燃烧器管相关联的NOx还原装置。喷射型燃料燃烧器与燃烧器管的水平燃烧部分的开放入口端相隔开并面对。 NOx还原装置包括多个金属网管，其直径基本上小于燃烧管的内径。网管连接在燃烧器管内，靠近其入口端，细长的支撑件纵向通过网管并具有固定到燃烧器管入口端的第一端，第二端可滑动地搁置在燃烧器管的内侧表面部分上燃烧器管。在燃烧器操作期间，喷射到燃烧器管中的燃烧器火焰被迫通过网管，其操作以横向地减小火焰的横截面，增加其通过燃烧器管的轴向速度，并且基本上减少二次燃烧与燃烧器管内火焰的最高温度区。

5. 发明授权

US5322050A High efficiency fuel-fired condensing furnace having a compact heat exchanger system 失效
标题翻译：具有紧凑型热交换器系统的高效燃油冷凝炉
公开(公告)号：US5322050A
公开(公告)日：1994-06-21
申请号：US95691
申请日：1993-07-21
申请人： Lin-Tao Lu
发明人： Lin-Tao Lu
IPC分类号： F24H3/08 , F24H8/00 , F24H3/02
CPC分类号： F24H8/00 , F24H3/087 , Y02B30/102
摘要： A tubular recuperative heat exchanger structure is mounted in a housing chamber within a fuel-fired condensing furnace in the vertical flow path of supply air being flowed through the housing by a blower. The heat exchanger structure comprises a primary heat exchanger defined by a vertically serpentined series of combustor tubes into open inlet ends of which a series of inshot-type fuel burners flow flames and hot combustion gases, and a secondary heat exchanger formed from a horizontally extending series of finned heat exchanger tubes having inlets in flow communication with the outlets of the combustor tubes and outlets in flow communication with the inlet of a draft inducer fan. The firing rate of the furnace is correlated to the configuration and relative geometries of the primary and secondary heat exchanger tubes in a manner making the overall heat exchanger highly compact and thermally efficient in addition to reducing air blower and draft inducer electrical consumption as well as reducing the operating noise of the furnace.
摘要翻译：管式回热换热器结构安装在燃料冷凝炉内的容纳室中，供应空气的垂直流动路径通过鼓风机流过壳体。热交换器结构包括由垂直蛇形的一系列燃烧器管限定的主热交换器，其开口的入口端，一系列喷射式燃料燃烧器流动火焰和热燃烧气体，以及由水平延伸的系列形成的二次热交换器翅片式热交换器管具有与引风机风扇的入口流动连通的与燃烧器管和出口的出口流动连通的入口。炉子的燃烧速率与一次和二次热交换器管的结构和相对几何形状相关，使总体热交换器除了减少鼓风机和牵引电机的电耗以及还原炉的操作噪音。

6. 发明授权

US5271376A Serpentined tubular heat exchanger apparatus for a fuel-fired forced air heating furnace 失效
标题翻译：用于燃油强制空气加热炉的蛇形管状热交换器装置
公开(公告)号：US5271376A
公开(公告)日：1993-12-21
申请号：US41888
申请日：1993-04-02
申请人： Lin-Tao Lu , Ali Shenasa , Diane M. Jakobs , Gallen W. Stokes
发明人： Lin-Tao Lu , Ali Shenasa , Diane M. Jakobs , Gallen W. Stokes
IPC分类号： F24H3/10 , F24H8/00 , F28F21/06
CPC分类号： F24H8/00 , F24H3/105 , F28F21/065 , F28F2001/027 , Y02B30/102 , Y10T29/49384 , Y10T29/49385
摘要： A fuel-fired condensing furnace is provided with a specially designed heat exchanger structure having a metal primary section and a plastic secondary or recuperative section. The primary section is defined by a horizontally spaced series of identically sized, vertically serpentined metal combustor tubes adapted to receive a throughflow of a burning fuel-air mixture discharged from the furnace burner section. Each tube has an essentially straight inlet combustion section sized to permit essentially complete combustion therein of the burning fuel-air mixture received by the tube, and a plurality of vertically spaced horizontal heat transfer sections that are horizontally flattened and narrowed to enhance their combustion heat transfer to supply air being forced upwardly through the furnace housing. The heat transfer efficiency of the flattened tube sections is further enhanced by forming spaced series of indentations in their flattened opposite side walls to create combustion gas flow turbulence within their interiors, and air flow turbulence along their exterior surfaces.
摘要翻译：燃料冷凝炉具有特殊设计的具有金属原始部分和塑料二次或再生部分的热交换器结构。主要部分由水平间隔的一系列相同尺寸的垂直蛇形金属燃烧器管限定，其适于接收从炉燃烧器部分排放的燃烧燃料 - 空气混合物的通流。每个管具有基本上直的入口燃烧部分，其大小允许在其中基本上完全燃烧由管接收的燃烧燃料 - 空气混合物，以及多个垂直间隔开的水平传热部分，其水平平坦化和变窄以增强其燃烧热传递供给被迫向上通过炉壳的空气。扁平管部分的传热效率通过在其平坦的相对侧壁中形成间隔的一系列凹陷来进一步增强，以在其内部产生燃烧气体流动湍流，并沿其外表面产生气流湍流。

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