US3765820A - Combustion apparatus - Google Patents

Combustion apparatus Download PDF

Info

Publication number
US3765820A
US3765820A US00285376A US3765820DA US3765820A US 3765820 A US3765820 A US 3765820A US 00285376 A US00285376 A US 00285376A US 3765820D A US3765820D A US 3765820DA US 3765820 A US3765820 A US 3765820A
Authority
US
United States
Prior art keywords
combustion
air
fuel
combustion apparatus
luminous element
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.)
Expired - Lifetime
Application number
US00285376A
Other languages
English (en)
Inventor
T Ito
T Nomaguichi
M Sakai
K Ito
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Application granted granted Critical
Publication of US3765820A publication Critical patent/US3765820A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements
    • F23N5/082—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements using electronic means
    • 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
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/725—Protection against flame failure by using flame detection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/08—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using light-sensitive elements

Definitions

  • the present invention relates generally to combustion apparatus and more particularly to an improved combustion apparatus for stabilizing the flame of combustion within the combustion chamber.
  • combustion apparatus One type of combustion system which has been widely employed in combustion apparatus is the diffu sion combustion system, practical embodiments of .which may include gun type combustion apparatus, pot
  • Such problems are particularly concerned with the velocity of combustion and the fuel supply velocity.
  • the fuel supply velocity is greater than the velocity of combustion, the flame is blown downstream, such phenomenon being known as a blown extinguishment.
  • the fuel supply velocity is less than the velocity of combustion, the flame is sucked back into the flame holes, thereby causing a backfire.
  • Complete combustion is thus impossible to attain and combustion is therefore intermittent whenever blown extinguishment or backfire occurs. Accordingly, it is desirable and necessary to prevent this unstable condition from occurring.
  • Yet another object of the present invention is to provide an improved combustion apparatus which will prevent the occurrence of backfire or blownextinguishment, and which will also eliminate a substantial portion of the attendant noise of combustion.
  • combustion apparatus which employs a luminous element disposed within, and projecting above, the combustion plate.
  • the light emitted by the element depending upon the state of combustion then present, is detected by a light detector, which, through appropriate electroniccircuitry containing various electronic components, will control the amount'of air supplied to the combustion housing.
  • the air supply will be automatically adjusted so as to return the apparatus to stable combustion operation.
  • the apparatus may be utilized so as to control the fuel supply.
  • FIG. 1 is a schematic scetional view of one embodiment of a combustion apparatus constructed according to this invention and showing its cooperative parts;
  • FIG. 2 is a schematic view of the control means for controlling the air supply of the combustion apparatus illustrated in FIG. 1.
  • a combustion apparatus generally indicated by the reference character 1 comprising a cylindrical combustion housing 2 having transversely disposed therein a combustion plate 3 which, having a plurality of flame holes, serves as a buyner.
  • a luminous element 4 which may be, for example, a platinum wire, is fitted within, and projects above, combustion plate 3.
  • the location of plate 3, relative to housing 2, divides housing 2 into a lower mixing chamber 5 for mixing fuel and air, and an upper combustion chamber 6.
  • a light detectingmeans 8, including light detector element 7, is electronically connected to a controller 9 which controls the air supply to be delivered to the combustion housing 2.
  • Controller 9 which is generally indicated by the dotted outline portion, comprises an amplifier 10 for amplifying the signal from detecting means 8, a thyristor short angle control circuit 11 and a bidirectional thyristor 12 for controlling the electrical output of an AC power source 13.
  • An air supplier 14, such as, for example, a blower, is electronically controlled by source 13 while an air duct 15 is provided for conducting the air supplied by blower 14 to the combustion housing 2.
  • a fuel supplier 16 for supplying fuel to the combustion housing 2 is likewise provided, the fuel being conducted to housing 2 via fuel supply pipe 17.
  • This stable condition of combustion can thus be automatically maintained by repetition of these operations should the combustion become'unstable at any instant of time.
  • the maximum and minimum limits of the short angle may be determined by the resistance of the control circuit 11.
  • the resulting change in the flame of combustion will not be instantaneous due to the large moment of inertia of the blower 14.
  • the changes in the flame of combustion will be rapid enough in order that the extreme unstable conditions of combustion, that is, back-fire, or blownextinguishment, will not be attained.
  • a CdS photoelectric element may be used as the light detector, it is also possible to use other photoelectric elements such as, for example, a photo-transistor, a sunelectric cell, or the like.
  • variable speed blower may be employed as the control means for controlling the amount of air supplied to the combustion housing, it is also possible to control the amount of air'supplied, by other means, such as, for example, a control valve actuated within the air duct 15.
  • the mode of operation is not limited to those'examples noted heretofore, and it is entirely possible to control the amount of fuel supplied to the combustion housing in lieu of controlling the air supply to the housing, such fuel supply being regulated by control means similar to those control elements disclosed heretofore. Accordingly, the present invention provides combustion apparatus for stabilizing the state of combustion by controlling either the fuel supply or the air supply being conducted to the combustion housing.
  • Combustion apparatus comprising: a fuel supplier for supplying fuel to said combustion apparatus; r
  • a mixing chamber for mixing said fuel and air supplied to said apparatus
  • a combustion plate for igniting said fuel and air mixture within a combustion chamber
  • a luminous element disposed within said combustion plate, said luminous element emitting light in an amount which is directly proportional to the amount of heat of combustion received by said elemom;
  • a light detector for detecting said light emitted from said luminous element
  • control means electronically connected to said light detector for controlling the amount of air supplied by said air supplier.
  • said combustion plate contains a plurality of 5 flame holes and separates said mixing chamber from said combustion chamber, and wherein said luminous element projects from said plate into said combustion chamber.
  • control means comprises:
  • an amplifier for amplifying a signal emitted by said light detector; a thyristor short angle control circuit for receiving said amplified signal; and a bidirectional thyristor for receiving a signal from
US00285376A 1972-02-03 1972-08-31 Combustion apparatus Expired - Lifetime US3765820A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47012392A JPS4897122A (ja) 1972-02-03 1972-02-03

Publications (1)

Publication Number Publication Date
US3765820A true US3765820A (en) 1973-10-16

Family

ID=11803984

Family Applications (1)

Application Number Title Priority Date Filing Date
US00285376A Expired - Lifetime US3765820A (en) 1972-02-03 1972-08-31 Combustion apparatus

Country Status (5)

Country Link
US (1) US3765820A (ja)
JP (1) JPS4897122A (ja)
CA (1) CA974626A (ja)
FR (1) FR2171702A5 (ja)
GB (1) GB1366589A (ja)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195558A (en) * 1977-11-14 1980-04-01 Speakman Thomas S Fuel consumption control system for cooking machines
WO1985000647A1 (en) * 1983-07-25 1985-02-14 Quantum Group Inc. Photovoltaic control systems
FR2564719A1 (fr) * 1984-05-23 1985-11-29 Bosch Siemens Hausgeraete Dispositif pour le rechauffement d'un flux d'air
US4778378A (en) * 1986-12-03 1988-10-18 Quantum Group, Inc. Self-powered intermittent ignition and control system for gas combustion appliances
US4789330A (en) * 1988-02-16 1988-12-06 Carrier Corporation Gas furnace control system
US4793799A (en) * 1983-07-25 1988-12-27 Quantum Group, Inc. Photovoltaic control system
US4806095A (en) * 1985-02-13 1989-02-21 Quantum Group, Inc. Fuel valve control system
US4898531A (en) * 1983-07-25 1990-02-06 Quantum Group, Inc. Photosensitive control of electrically powered emissive ignition devices
US4906178A (en) * 1983-07-25 1990-03-06 Quantum Group, Inc. Self-powered gas appliance
US5711661A (en) * 1994-05-03 1998-01-27 Quantum Group, Inc. High intensity, low NOx matrix burner
WO1998021450A1 (en) * 1996-11-12 1998-05-22 Siemens Westinghouse Power Corporation Combustor with flashback arresting system
US5865164A (en) * 1995-09-12 1999-02-02 Garceau; William J. Fluid flow valves and cooking machine control systems utilizing such valves
US5975072A (en) * 1995-09-12 1999-11-02 Garceau; William J. Fluid flow valves and cooking machine control system utilizing such valves
US6213757B1 (en) 1995-06-07 2001-04-10 Quantum Group Inc. Advanced emissive matrix combustion
US20190301732A1 (en) * 2018-04-03 2019-10-03 Mestek, Inc. High turndown boiler and system and method for controlling a boiler

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5156030A (ja) * 1974-11-11 1976-05-17 Matsushita Electric Ind Co Ltd Nenshoseigyosochi
JPS5782617A (en) * 1980-11-11 1982-05-24 Toshiba Corp Safety device for combustor
FR2557674A1 (fr) * 1983-12-30 1985-07-05 Sdecc Dispositif de commande et de securite pour chauffe-eau ou chauffe-bains a gaz sans veilleuse permanente
NL8400406A (nl) * 1984-02-08 1985-09-02 Veg Gasinstituut Nv Gasbrander.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3193199A (en) * 1959-03-16 1965-07-06 Allen E Fuhs Apparatus and method of combustion control
US3304989A (en) * 1964-11-19 1967-02-21 American Radiator & Standard Fuel feed control system responsive to flame color

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3193199A (en) * 1959-03-16 1965-07-06 Allen E Fuhs Apparatus and method of combustion control
US3304989A (en) * 1964-11-19 1967-02-21 American Radiator & Standard Fuel feed control system responsive to flame color

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195558A (en) * 1977-11-14 1980-04-01 Speakman Thomas S Fuel consumption control system for cooking machines
US4906178A (en) * 1983-07-25 1990-03-06 Quantum Group, Inc. Self-powered gas appliance
WO1985000647A1 (en) * 1983-07-25 1985-02-14 Quantum Group Inc. Photovoltaic control systems
US4793799A (en) * 1983-07-25 1988-12-27 Quantum Group, Inc. Photovoltaic control system
US4898531A (en) * 1983-07-25 1990-02-06 Quantum Group, Inc. Photosensitive control of electrically powered emissive ignition devices
FR2564719A1 (fr) * 1984-05-23 1985-11-29 Bosch Siemens Hausgeraete Dispositif pour le rechauffement d'un flux d'air
US4806095A (en) * 1985-02-13 1989-02-21 Quantum Group, Inc. Fuel valve control system
US4778378A (en) * 1986-12-03 1988-10-18 Quantum Group, Inc. Self-powered intermittent ignition and control system for gas combustion appliances
US4789330A (en) * 1988-02-16 1988-12-06 Carrier Corporation Gas furnace control system
US5711661A (en) * 1994-05-03 1998-01-27 Quantum Group, Inc. High intensity, low NOx matrix burner
US6213757B1 (en) 1995-06-07 2001-04-10 Quantum Group Inc. Advanced emissive matrix combustion
US5865164A (en) * 1995-09-12 1999-02-02 Garceau; William J. Fluid flow valves and cooking machine control systems utilizing such valves
US5937847A (en) * 1995-09-12 1999-08-17 Garceau; William J. Fluid flow valves and cooking machine control systems utilizing such valves
US5975072A (en) * 1995-09-12 1999-11-02 Garceau; William J. Fluid flow valves and cooking machine control system utilizing such valves
US5988155A (en) * 1995-09-12 1999-11-23 Garceau; William J. Fluid flow valves and cooking machine control systems utilizing such valves
WO1998021450A1 (en) * 1996-11-12 1998-05-22 Siemens Westinghouse Power Corporation Combustor with flashback arresting system
US5857320A (en) * 1996-11-12 1999-01-12 Westinghouse Electric Corporation Combustor with flashback arresting system
US20190301732A1 (en) * 2018-04-03 2019-10-03 Mestek, Inc. High turndown boiler and system and method for controlling a boiler
US11300290B2 (en) * 2018-04-03 2022-04-12 Mestek, Inc. High turndown boiler and system and method for controlling a boiler

Also Published As

Publication number Publication date
DE2252618B2 (de) 1975-09-25
JPS4897122A (ja) 1973-12-11
DE2252618A1 (de) 1973-08-16
CA974626A (en) 1975-09-16
GB1366589A (en) 1974-09-11
FR2171702A5 (ja) 1973-09-21

Similar Documents

Publication Publication Date Title
US3765820A (en) Combustion apparatus
US4588372A (en) Flame ionization control of a partially premixed gas burner with regulated secondary air
US3147795A (en) Burner utilizing an eddy plate for proper mixing of fuel and air
GB2226163A (en) Air/fuel ratio control for a burner
US4428726A (en) Burner apparatus
US3486835A (en) Power conversion burner head
DE3777053D1 (de) Verfahren zum betreiben von vormischbrennern und vorrichtung zum durchfuehren dieses verfahrens.
JPS6242280Y2 (ja)
US3820943A (en) Power burner
US5762490A (en) Premixed gas burner orifice
JP2980533B2 (ja) 予混合式ガスバーナ
JPH0712331A (ja) 燃焼器の燃焼制御装置及び方法
GR3000770T3 (en) Premix gas burner with flame control
KR200156819Y1 (ko) 가스센서를 이용한 연소 공기량 자동조절 장치
JPS57204709A (en) Combustion furnace controlling generation of nitrogen oxide
GB1421376A (en) Forced air draught gas burning appliances
CN117242299A (zh) 亮式辐射器
RU5010U1 (ru) Газовая горелка
JPH0740849Y2 (ja) 予混合バーナ
JPH051816A (ja) 触媒燃焼装置
JPH0616291Y2 (ja) 燃焼装置
JPH0571845B2 (ja)
JPH0711334B2 (ja) 燃焼器具の安全装置
JPS6249122A (ja) 液体燃料燃焼装置
KR910000583B1 (ko) 기화버어너에 있어서의 연소제어장치