US20160069563A1 - Device for burning pre-mixed gas - Google Patents

Device for burning pre-mixed gas Download PDF

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Publication number
US20160069563A1
US20160069563A1 US14/662,515 US201514662515A US2016069563A1 US 20160069563 A1 US20160069563 A1 US 20160069563A1 US 201514662515 A US201514662515 A US 201514662515A US 2016069563 A1 US2016069563 A1 US 2016069563A1
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US
United States
Prior art keywords
gas
ventilator
movable part
air
negative pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/662,515
Inventor
Yves CAZARD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YAHTEC
Original Assignee
YAHTEC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR1452252A external-priority patent/FR3018899A1/en
Application filed by YAHTEC filed Critical YAHTEC
Assigned to YAHTEC reassignment YAHTEC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CAZARD, YVES
Publication of US20160069563A1 publication Critical patent/US20160069563A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/027—Regulating fuel supply conjointly with air supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
    • F23N5/188—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet

Definitions

  • the present invention relates to a device for burning premixed gas.
  • a device for burning premixed gas operates with a constant air/gas ratio. It includes a venturi, which creates a negative pressure on the gas valve. This negative pressure is more or less important depending on the power being required.
  • Such a device has however a drawback, knowing that the negative pressure changes according to the squared flow rate, it is difficult to obtain a sufficient negative-pressure signal when the flow rate is reduced beyond 5. Indeed, when the flow rate is divided by 5, the negative pressure is divided by 25.
  • the present invention pretends to cope with the above drawback without using a control or any external power sources.
  • the device for burning premixed gas includes a ventilator for drawing in the air/gas mixture, a gas-supply valve, a gas injector and a venturi interposed between said injector and said ventilator, so as to create a negative pressure on said gas valve, and it is characterized in that said device comprises a movable part capable of moving under the action of said ventilator and a restoring spring, the displacement of said movable part being capable modifying the cross-sections of the gas and air passages.
  • the movable part includes a planar wall capable of being subjected to the negative pressure exerted by the ventilator, and comprising, on its face opposite the one subjected to said negative pressure, projecting elements capable of being inserted into openings a body, in which said movable part is guided in displacement, comprises and which are connected to the gas or air supply means, the cooperation of said projecting elements with said openings occurring through conical surfaces, so that the depth of insertion of said projecting elements into said openings permits to change the dimensions of the passages, and thus to modulate the flow rates.
  • FIG. 1 is a schematic view, representing the device for burning premixed gas according to the invention.
  • FIG. 2 is a cross-sectional view, representing a schematic median cross-section of a portion of the same device.
  • the device for burning premixed gas includes a centrifugal ventilator 1 for drawing in the air/gas mixture AG, a gas-control solenoid valve 2 controlled by a motor M, an injector 3 of gas G and a venturi 4 .
  • the venturi 4 which is also shown in FIG. 2 , includes, in front of the ventilator 1 , a part 40 , or piston, movable under the action of the negative pressure generated by the ventilator 1 , which is capable, depending on its position in the venturi 4 , of modifying the cross-section of the passage 41 for gas G and the passage 42 for air A.
  • the venturi 4 comprises two parts, besides the movable part or piston 40 , a body 5 comprising three concentric tubular parts—an inner part 50 , an outer part 51 and an intermediate part 52 .
  • the intermediate 52 and outer 51 concentric tubular parts are interconnected by material bridges 53 , so as to create a tubular space 54 .
  • the intermediate 52 and inner 50 concentric tubular portions are, in turn, united by an end wall 55 , which is only centrally drilled with a hole 56 ending into the inner tubular portion 50 .
  • the part 40 comprises a planar wall 44 bordered peripherally and at one side by a wall 45 aimed at being inserted into the space 54 , and which has externally a tubular face 46 of a diameter that permits a close insertion of same without jamming into the outer tubular portion 5 , and at the inner side a generally frustoconical face 47 , the thickness at the base of which, on the side of the planar wall 44 , is larger than the width of the space 54 .
  • the part 40 is thus movable axially within the outer tubular portion 51 , guided by the inner face of the latter, while the depth of insertion of the wall 45 into the space 54 , due to the obliquity of the face 47 , modulates the size of the passage 42 between the space 54 and the space delimited by the walls 44 and 55 , until this passage is eventually closed. It should be noted that stops 57 are interposed between the walls 44 and 55 .
  • the part 40 includes centrally an axis 48 inserted into the hole 56 and extending in the inner tubular portion 50 .
  • the hole 56 is of a frustoconical shape, flared towards the part 40 , while the axis 48 is provided at its base with a cylindrical part 49 of a diameter slightly larger than the smallest one of the frustoconical hole 56 , so as to permit, depending on the depth of insertion of the part 49 into this frustoconical hole 56 , to modulate the width of the passage 41 and even to close it.
  • the space 54 is open to the outside, while the inner tubular portion 50 is connected to the injector 3 of gas G.
  • planar wall 44 is drilled peripherally, on the inner side of the wall 45 , with openings O.
  • the ventilator 1 creates a negative pressure at the level of the wall 44 , and draws in the movable part or piston 40 .
  • This displacement opens the passages 41 and 42 , and the air A and the gas G flow through the wall 44 through the openings O in order to be mixed.
  • the movable part 40 When the flow rate of the ventilator 1 increases, the movable part 40 is drawn in by the negative pressure created by the ventilator 1 , and moves towards the latter, which permits to enlarge the cross-sections of the passages 41 of the gas G and the air A.
  • a venturi system 4 is thus obtained, which is automatically adapted depending on the operation of the ventilator 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

A device for burning premixed gas, including a ventilator (1) for drawing in the air/gas mixture, a gas-supply valve (2), a gas injector (3), and a venturi (4) interposed between said injector (3) and the ventilator (1), so as to create a negative pressure on the gas valve (2),
The venturi (4) includes a movable part (40) capable of moving under the action of said ventilator (1) and a restoring spring (43), the displacement of said movable part being capable modifying the cross-sections of the passages (41, 42) for gas (G) and air (A).

Description

    RELATED U.S. APPLICATIONS
  • Not applicable.
    • STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
  • Not applicable.
    • REFERENCE TO MICROFICHE APPENDIX
  • Not applicable.
    • BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a device for burning premixed gas.
  • 2. Description of Related Art Including Information Disclosed Under 37 CFR 1.97 and 37 CFR 1.98.
  • A device for burning premixed gas operates with a constant air/gas ratio. It includes a venturi, which creates a negative pressure on the gas valve. This negative pressure is more or less important depending on the power being required.
  • Such a device has however a drawback, knowing that the negative pressure changes according to the squared flow rate, it is difficult to obtain a sufficient negative-pressure signal when the flow rate is reduced beyond 5. Indeed, when the flow rate is divided by 5, the negative pressure is divided by 25.
  • In order to cope with this drawback and to permit high modulation rates, it has been proposed to vary the suction cross-section of the combustion air and the gas in equal proportions. This is achieved through mechanical systems generally controlled by servo-motors or solenoids. Thanks to changes in cross-sections, the negative pressure remains high despite a reduction in flow rate.
    • SUMMARY OF THE INVENTION
  • The present invention pretends to cope with the above drawback without using a control or any external power sources.
  • The device for burning premixed gas according to the invention includes a ventilator for drawing in the air/gas mixture, a gas-supply valve, a gas injector and a venturi interposed between said injector and said ventilator, so as to create a negative pressure on said gas valve, and it is characterized in that said device comprises a movable part capable of moving under the action of said ventilator and a restoring spring, the displacement of said movable part being capable modifying the cross-sections of the gas and air passages.
  • According to an additional feature of the device according to the invention, the movable part includes a planar wall capable of being subjected to the negative pressure exerted by the ventilator, and comprising, on its face opposite the one subjected to said negative pressure, projecting elements capable of being inserted into openings a body, in which said movable part is guided in displacement, comprises and which are connected to the gas or air supply means, the cooperation of said projecting elements with said openings occurring through conical surfaces, so that the depth of insertion of said projecting elements into said openings permits to change the dimensions of the passages, and thus to modulate the flow rates.
  • The advantages and features of the device according to the invention will become clear from the following description, which relates to the attached drawing, which shows a non-restrictive embodiment of same.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic view, representing the device for burning premixed gas according to the invention.
  • FIG. 2 is a cross-sectional view, representing a schematic median cross-section of a portion of the same device.
    •  DETAILED DESCRIPTION OF THE DRAWINGS
  • When referring to FIG. 1, we can see that the device for burning premixed gas includes a centrifugal ventilator 1 for drawing in the air/gas mixture AG, a gas-control solenoid valve 2 controlled by a motor M, an injector 3 of gas G and a venturi 4.
  • According to the invention, the venturi 4, which is also shown in FIG. 2, includes, in front of the ventilator 1, a part 40, or piston, movable under the action of the negative pressure generated by the ventilator 1, which is capable, depending on its position in the venturi 4, of modifying the cross-section of the passage 41 for gas G and the passage 42 for air A.
  • To this end, the venturi 4 comprises two parts, besides the movable part or piston 40, a body 5 comprising three concentric tubular parts—an inner part 50, an outer part 51 and an intermediate part 52.
  • The intermediate 52 and outer 51 concentric tubular parts are interconnected by material bridges 53, so as to create a tubular space 54. The intermediate 52 and inner 50 concentric tubular portions are, in turn, united by an end wall 55, which is only centrally drilled with a hole 56 ending into the inner tubular portion 50.
  • The part 40 comprises a planar wall 44 bordered peripherally and at one side by a wall 45 aimed at being inserted into the space 54, and which has externally a tubular face 46 of a diameter that permits a close insertion of same without jamming into the outer tubular portion 5, and at the inner side a generally frustoconical face 47, the thickness at the base of which, on the side of the planar wall 44, is larger than the width of the space 54.
  • The part 40 is thus movable axially within the outer tubular portion 51, guided by the inner face of the latter, while the depth of insertion of the wall 45 into the space 54, due to the obliquity of the face 47, modulates the size of the passage 42 between the space 54 and the space delimited by the walls 44 and 55, until this passage is eventually closed. It should be noted that stops 57 are interposed between the walls 44 and 55.
  • Furthermore, the part 40 includes centrally an axis 48 inserted into the hole 56 and extending in the inner tubular portion 50.
  • The hole 56 is of a frustoconical shape, flared towards the part 40, while the axis 48 is provided at its base with a cylindrical part 49 of a diameter slightly larger than the smallest one of the frustoconical hole 56, so as to permit, depending on the depth of insertion of the part 49 into this frustoconical hole 56, to modulate the width of the passage 41 and even to close it.
  • It will be understood that depending on the position of the part 40 relative to the end wall 55, this permits to modulate the flow rates at the level of the passages 41 and 42.
  • The space 54 is open to the outside, while the inner tubular portion 50 is connected to the injector 3 of gas G.
  • Finally, the planar wall 44 is drilled peripherally, on the inner side of the wall 45, with openings O.
  • In operation, the ventilator 1 creates a negative pressure at the level of the wall 44, and draws in the movable part or piston 40.
  • This displacement opens the passages 41 and 42, and the air A and the gas G flow through the wall 44 through the openings O in order to be mixed.
  • When the flow rate of the ventilator 1 increases, the movable part 40 is drawn in by the negative pressure created by the ventilator 1, and moves towards the latter, which permits to enlarge the cross-sections of the passages 41 of the gas G and the air A.
  • When the flow rate decreases, the movable part 40 is restored by a spring 43 mounted on the axis 48, which reduces the passages 41 and 42.
  • A venturi system 4 is thus obtained, which is automatically adapted depending on the operation of the ventilator 1.

Claims (2)

1. A device for burning premixed gas comprising:
a ventilator drawing in an air/gas mixture,
a gas-supply valve,
a gas injector, and
a venturi interposed between said gas injector and said ventilator, so as to create a negative pressure on said gas-supply valve,
wherein said venturi comprises a movable part moving under action of said ventilator and a restoring spring, and wherein displacement of said movable part modifies cross-sections of passages for gas and air.
2. Device according to claim 1, wherein said movable part comprises a planar wall being subjected to negative pressure exerted by said ventilator on one face of said planar wall, and, on an opposite face of said planar wall, projecting elements inserted into openings of a body, said movable part being guided in displacement, said body being connected to a supply means for gas or air, wherein cooperation of said projecting elements with said openings occurs through conical surfaces so that depth of insertion of said projecting elements into said openings changes dimensions of the passages, and wherein flow rates are modulated.
US14/662,515 2014-03-19 2015-03-19 Device for burning pre-mixed gas Abandoned US20160069563A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR1452252A FR3018899A1 (en) 2014-03-19 2014-03-19 BURNER DEVICE WITH PRE GAS MIXTURE
FR1452252 2014-03-19
FR1456766A FR3018900B1 (en) 2014-03-19 2014-07-15 BURNER DEVICE WITH PRE GAS MIX
FR1456766 2014-07-15

Publications (1)

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US20160069563A1 true US20160069563A1 (en) 2016-03-10

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US14/662,515 Abandoned US20160069563A1 (en) 2014-03-19 2015-03-19 Device for burning pre-mixed gas

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US (1) US20160069563A1 (en)
EP (1) EP2921777B1 (en)
FR (1) FR3018900B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3460324A1 (en) * 2017-09-25 2019-03-27 Robert Bosch GmbH Mixing device for heating devices and heating devices with such a mixing device
CN110582671A (en) * 2017-02-02 2019-12-17 麦克斯威索有限公司 Premixing method, combustion principle and premixing device using the method, and combustor with the premixing device
US20210404706A1 (en) * 2020-06-24 2021-12-30 A.O. Smith (China) Water Heater Co., Ltd. Gas mixing device and gas water heating device
US11808453B2 (en) 2020-06-24 2023-11-07 A.O. Smith Corporation Gas mixing device and gas water heating device

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US1490008A (en) * 1920-08-02 1924-04-08 Hetsch Franz Karl Burner for liquid fuel
US1695215A (en) * 1923-04-23 1928-12-11 Earle I Staples Liquid-fuel burner
US2368178A (en) * 1943-01-26 1945-01-30 Hauck Mfg Co Combination burner for liquid and gaseous fuels
US2565039A (en) * 1946-10-05 1951-08-21 Herman G Mueller Vortical flame gas burner
US2583570A (en) * 1945-06-28 1952-01-29 Clarence N Hickman Nozzle for rocket motors
US2971327A (en) * 1957-11-26 1961-02-14 Westinghouse Electric Corp Discharge control of an overexpanding propulsion nozzle
US3101897A (en) * 1960-12-29 1963-08-27 Suburban Appliance Company Control for burners
US3384338A (en) * 1965-04-06 1968-05-21 North American Rockwell Variable orifice device
US3511587A (en) * 1967-10-03 1970-05-12 Zimmermann & Jansen Gmbh Burner construction
US3533717A (en) * 1967-07-04 1970-10-13 Robert Edmond Guerin Emulsifier burner for hydrocarbons and water with mechanical spraying a controlled flame and having an anti-atmospheric pollution effect
US3721387A (en) * 1971-06-02 1973-03-20 United Aircraft Corp Ejector with variable mixing section and primary nozzle areas
US3782884A (en) * 1972-05-09 1974-01-01 Standard Oil Co Acid gas burner
US4361147A (en) * 1979-01-22 1982-11-30 Master Medical Corporation Flow control device for administration of intravenous fluids
US5038559A (en) * 1981-12-22 1991-08-13 Allied-Signal Inc. Method and apparatus for selectively varying an effective fluid flow area of a jet engine exhaust nozzle
US5199866A (en) * 1992-03-30 1993-04-06 Air Products And Chemicals, Inc. Adjustable momentum self-cooled oxy/fuel burner for heating in high temperature environments
US5240409A (en) * 1992-04-10 1993-08-31 Institute Of Gas Technology Premixed fuel/air burners
US5486108A (en) * 1991-05-07 1996-01-23 Sanyo Electric Co., Ltd. Gas burner
US5800160A (en) * 1995-12-21 1998-09-01 Abb Research Ltd. Premix burner for a heat generator
US6206687B1 (en) * 1997-01-24 2001-03-27 Aaf-Mcquay Inc. High turndown modulating gas burner
US6220852B1 (en) * 1999-03-25 2001-04-24 Hauck Manufacturing Company Variable exit high velocity burner
US6536678B2 (en) * 2000-12-15 2003-03-25 Honeywell International Inc. Boiler control system and method
US20050053887A1 (en) * 2002-06-26 2005-03-10 Per Westergaard Burner fuel mixer head for concurrently burning two gaseous fuels
US20110151389A1 (en) * 2009-12-22 2011-06-23 Riello S.P.A. Air-gas premixing device in a low-nox gas burner
US9074762B2 (en) * 2009-08-03 2015-07-07 Siemens Aktiengesellschaft Stabilizing the flame of a burner

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IT1391676B1 (en) * 2008-11-07 2012-01-17 Sit La Precisa Spa Con Socio Unico GAS BURNER UNIT WITH PRE-MIXING

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US759320A (en) * 1901-12-26 1904-05-10 Schutte & Koerting Co Jet-nozzle.
US1490008A (en) * 1920-08-02 1924-04-08 Hetsch Franz Karl Burner for liquid fuel
US1695215A (en) * 1923-04-23 1928-12-11 Earle I Staples Liquid-fuel burner
US2368178A (en) * 1943-01-26 1945-01-30 Hauck Mfg Co Combination burner for liquid and gaseous fuels
US2583570A (en) * 1945-06-28 1952-01-29 Clarence N Hickman Nozzle for rocket motors
US2565039A (en) * 1946-10-05 1951-08-21 Herman G Mueller Vortical flame gas burner
US2971327A (en) * 1957-11-26 1961-02-14 Westinghouse Electric Corp Discharge control of an overexpanding propulsion nozzle
US3101897A (en) * 1960-12-29 1963-08-27 Suburban Appliance Company Control for burners
US3384338A (en) * 1965-04-06 1968-05-21 North American Rockwell Variable orifice device
US3533717A (en) * 1967-07-04 1970-10-13 Robert Edmond Guerin Emulsifier burner for hydrocarbons and water with mechanical spraying a controlled flame and having an anti-atmospheric pollution effect
US3511587A (en) * 1967-10-03 1970-05-12 Zimmermann & Jansen Gmbh Burner construction
US3721387A (en) * 1971-06-02 1973-03-20 United Aircraft Corp Ejector with variable mixing section and primary nozzle areas
US3782884A (en) * 1972-05-09 1974-01-01 Standard Oil Co Acid gas burner
US4361147A (en) * 1979-01-22 1982-11-30 Master Medical Corporation Flow control device for administration of intravenous fluids
US5038559A (en) * 1981-12-22 1991-08-13 Allied-Signal Inc. Method and apparatus for selectively varying an effective fluid flow area of a jet engine exhaust nozzle
US5486108A (en) * 1991-05-07 1996-01-23 Sanyo Electric Co., Ltd. Gas burner
US5199866A (en) * 1992-03-30 1993-04-06 Air Products And Chemicals, Inc. Adjustable momentum self-cooled oxy/fuel burner for heating in high temperature environments
US5240409A (en) * 1992-04-10 1993-08-31 Institute Of Gas Technology Premixed fuel/air burners
US5800160A (en) * 1995-12-21 1998-09-01 Abb Research Ltd. Premix burner for a heat generator
US6206687B1 (en) * 1997-01-24 2001-03-27 Aaf-Mcquay Inc. High turndown modulating gas burner
US6220852B1 (en) * 1999-03-25 2001-04-24 Hauck Manufacturing Company Variable exit high velocity burner
US6536678B2 (en) * 2000-12-15 2003-03-25 Honeywell International Inc. Boiler control system and method
US20050053887A1 (en) * 2002-06-26 2005-03-10 Per Westergaard Burner fuel mixer head for concurrently burning two gaseous fuels
US9074762B2 (en) * 2009-08-03 2015-07-07 Siemens Aktiengesellschaft Stabilizing the flame of a burner
US20110151389A1 (en) * 2009-12-22 2011-06-23 Riello S.P.A. Air-gas premixing device in a low-nox gas burner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110582671A (en) * 2017-02-02 2019-12-17 麦克斯威索有限公司 Premixing method, combustion principle and premixing device using the method, and combustor with the premixing device
EP3460324A1 (en) * 2017-09-25 2019-03-27 Robert Bosch GmbH Mixing device for heating devices and heating devices with such a mixing device
US20210404706A1 (en) * 2020-06-24 2021-12-30 A.O. Smith (China) Water Heater Co., Ltd. Gas mixing device and gas water heating device
US11585573B2 (en) * 2020-06-24 2023-02-21 A. O. Smith Corporation Gas mixing device and gas water heating device
US11808453B2 (en) 2020-06-24 2023-11-07 A.O. Smith Corporation Gas mixing device and gas water heating device

Also Published As

Publication number Publication date
EP2921777B1 (en) 2016-10-12
FR3018900B1 (en) 2016-04-15
FR3018900A1 (en) 2015-09-25
EP2921777A1 (en) 2015-09-23

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