[특허]Low pressure drop, low NOx, induced draft gas heaters

Low pressure drop, low NOx, induced draft gas heaters 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F23D-014/04 F23M-020/00
출원번호	US-0166361 (2011-06-22)
등록번호	US-9127837 (2015-09-08)
발명자 / 주소	Proscia, William Liljenberg, Scott A. Roy, William J. McCormick, Duane C. Chipman, Christopher T.
출원인 / 주소	Carrier Corporation
대리인 / 주소	Miller, Matthias & Hull LLP
인용정보	피인용 횟수 : 0 인용 특허 : 33

초록 ▼

An improved induced draft gas burner assembly for low NOx residential and light commercial gas furnaces is disclosed. The improved burner includes an upstream assembly coupled to a fuel inlet and an air inlet. The air inlet is coupled to a neck extending between the air inlet and the outlet of the neck, both of which may be disposed within an optional chamber. If used, such a chamber also includes an outlet coupled to a burner. In practice, the chamber and neck 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.

대표청구항 ▼

1. A gas burner assembly, comprising: an upstream end comprising at least one neck comprising one end in communication with an air supply and optionally a fuel supply and a second end in communication with at least one burner tube,the burner tube is physically coupled to a heat exchanger and via at least one downstream component, the at least one downstream component being disposed opposite the burner tube from the neck, the at least one downstream component comprising a cylindrical portion having a constant cross-section,the neck comprises one or more variables selected from the group consisting of a length, a constant cross-sectional area, a variable cross-sectional area, and a shape or geometry, that provides an upstream impedance (Zup) of air and optionally fuel flowing through the neck that exceeds a downstream impedance (Zdown) of combustion gases flowing through the heat exchanger and downstream components to provide a stable flame at the burner, andat least one chamber wherein the neck and chamber form at least one Helmholtz resonator and wherein the neck is disposed substantially within the chamber. 2. The burner assembly of claim 1 wherein the neck has a geometry selected from the group consisting of a straight tube, a tube with multiple bends and a coiled tube. 3. The burner assembly of claim 1 wherein the neck comprises a tube with a narrow inlet and a wider outlet that is coupled to the burner and that flares gradually outwardly between the inlet and outlet. 4. The burner assembly of claim 1, wherein the fuel inlet and air inlet are both coupled to the neck. 5. A gas furnace, comprising: a plurality of burner assemblies, each burner assembly comprising at least one burner tube coupled between a heat exchanger and an upstream end, the at least one burner tube physically coupled to the heat exchanger via at least one downstream component, the at least one downstream component being disposed opposite the at least one burner tube from the upstream end, the at least one downstream component comprising a cylindrical portion having a constant cross-section,each upstream end comprising at least one neck comprising one end in communication with an air supply and optionally a fuel supply and a second end in communication with the at least one burner tube,each neck comprising one or more variables selected from the group consisting of a length, a constant cross-sectional area, a variable cross-sectional area, and a shape or geometry, that provides an upstream impedance (Zup) of air and optionally fuel flowing through the neck that exceeds a downstream impedance (Zdown) of combustion gases flowing through the heat exchanger and downstream components to provide a stable flame at the burner, andat least one chamber in communication with at least one neck, the at least one neck and at least one chamber forming at least one Helmholtz resonator wherein the at least one neck comprises a plurality of necks and the at least one chamber comprises a plurality of chambers, each neck is disposed substantially within one of the chambers, each chamber being in communication with one of the burners. 6. The furnace of claim 5 wherein the neck has a geometry selected from the group consisting of a straight tube, a tube with multiple bends, a coiled tube and a tube with a narrow inlet and a wider outlet that is coupled to the burner and that flares gradually outwardly between the inlet and outlet.

이 특허에 인용된 특허 (33)

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Kostiuk Larry W. (Edmonton CA CAX) Cheng Robert K. (Kensington CA), Apparatus and method for burning a lean, premixed fuel/air mixture with low NOx emission.
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Jalics Stephen M. (Rocky River OH), Apparatus for detecting the occurrence of inadequate levels of combustion air at a flame.
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Keller Jakob J.,CHX, Burner with acoustically damped fuel supply system.
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Jakob Keller CH; Georg Keller CH; Vera Keller CH, Combustion chamber for a gas turbine.
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Schnell, Alexander; Noiray, Nicolas; Reinert, Felix; Lauffer, Diane; Schuermans, Bruno, Combustion device of a gas turbine including a plurality of passages and chambers defining helmholtz resonators.
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Hellat, Jaan; Tschirren, Stefan; Stuber, Peter; Paschereit, Christian Oliver, Damper arrangement for reducing combustion-chamber pulsations.
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Marcel Stalder CH; Franz Joos DE, Damping device for reducing the vibration amplitude of acoustic waves for a burner.
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Cesa,Valentin, Device for producing a plasma, ionization method, use of said method and production processes using said device.
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Knight Brian A. ; Patrick William P. ; Seery Daniel J. ; Zabielski Martin F., Flashback resistant burner.
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Belcastro ; deceased ; Rosario ; Belcastro ; administratrix ; by Patri cia, Forced air heating system.
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Sutton David M. (Camberley GBX), Fuel fired burners.
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Kwait Benjamin F. (100 Old Cow Pasture Lane Smoke Rise ; Kinnelon NJ 07405), Fuel saving system.
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Sams Gary W. ; Inman Merle B., Gas burner system providing reduced noise levels.
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Ephraim Gutmark ; Christian Oliver Paschereit CH; Wolfgang Weisenstein CH, Method and apparatus for controlling thermoacoustic vibrations in a combustion system.
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Hermann Jakob,DEX ; Hantschk Carl-Christian,DEX ; Zangl Peter,DEX ; Vortmeyer Dieter,DEX ; Orthmann Armin,DEX, Method for the active damping of combustion oscillation and combustion apparatus.
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Zia, Ninev Karl; Ho, Chi Ming; Reeves, Brian A., Micro inshot burner.
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Flanagan Paul (Northfield OH), Mixing rate controlled pulse combustion burner.
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Manohar, Shailesh Sharad; Park, Young Kyu, NOx reduction with a combination of radiation baffle and catalytic device.
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Specht, Werner, One shot heat exchanger burner.
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Bellucci,Valter; Meili,Francois; Paschereit,Christian Oliver; Schuermans,Bruno, Premix burner.
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Mansour Momtaz N. (Columbia MD), Process and apparatus for heating fluids employing a pulse combustor.
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Johnson, Clifford E.; Wasif, Samer P., Resonator device at junction of combustor and combustion chamber.
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Keller Jakob (Redmond WA), Secondary burner having a through-flow helmholtz resonator.
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Baese, David C.; Collins, Barry A.; Sarfehjoo, Mohsen; Bodnar, Timothy J., Water heater with continuously variable air and fuel input.
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