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US3617159A - Gas-boiler igniting system - Google Patents

Gas-boiler igniting system Download PDF

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Publication number
US3617159A
US3617159A US855070A US3617159DA US3617159A US 3617159 A US3617159 A US 3617159A US 855070 A US855070 A US 855070A US 3617159D A US3617159D A US 3617159DA US 3617159 A US3617159 A US 3617159A
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US
United States
Prior art keywords
burner
flame
pilot burner
main
pilot
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
US855070A
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English (en)
Inventor
William C Arndt
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.)
Marley Wylain Co LLC
Original Assignee
Weil McLain Co Inc
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 Weil McLain Co Inc filed Critical Weil McLain Co Inc
Application granted granted Critical
Publication of US3617159A publication Critical patent/US3617159A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • An ignition system for a gas-fired boiler is provided in which electrical circuitry is utilized in a novel matter to consecutively initiate and terminate several stages in the ignition of the boiler burners.
  • Fuel is initially supplied to a multiport pilot burner, is ignited, and the existence of the flame across the entire length of the multiport pilot burner is positively assured by an ultraviolet flame-sensing means.
  • the flow of fuel to the main burner is initiated, and after a predetermined time, the fuel flow to the multiport pilot burner is halted, thereby extinguishing the multiport pilot burner flame.
  • the above-discussed sensing means is then used to supervise and insure that main burner flame is present. Fuel supply to the main burner is cut off in response to an indication by the sensing means that main burner flame is not present.
  • This invention relates generally to heating equipment and more particularly concerns an automatic system for staging and insuring the ignition of burners in a gas-fired boiler.
  • a secondary object of the invention is to provide a simple method and rugged and reliable associated apparatus for accomplishing the above objects.
  • FIG. I is an elevational view of a typical gas-fired boiler utilizing the novel ignition system
  • FIG. 2 is a partial plan view of the burner assemblies and associated apparatus installed in the boiler of FIG. 1,
  • FIG. 3 is a plan view showing in a greater detail the pilot burner and sensing means associated with one of the main burner assemblies
  • FIG. 4 is a perspective view showing in detail the blind end of the-pilot burner and the associated main burner tube, having the sensing means mounted thereupon,
  • FIG. 5 is a schematic illustration of the electrical circuitry utilized in the invention.
  • FIGS. 1 and 2 there is shown a gas-fired multiple-section boiler 10, wherein the present invention is incorporated, which provides heat to a building automatically upon the demand signal of a conventional thermostat. Water is circulated for heating in the upper portions of the boiler and is then conducted to and from appropriate radiators by pipework 11.
  • one or more burner assemblies l2, l3 and 14 are provided in the base of the boiler.
  • Fuel which may be natural gas, is supplied through schematically shown pipework 15 to a number of main bumer tubes 16, each of which is provided with ports 16a, to allow the combustible fuel to escape, ignite, and provide the demanded boiler heat.
  • a fuel supply is shut off and the burner flame extinguished.
  • a multiport pilot burner 21 bridging the main burner assembly 13 which is initially ignited when the demand for heat is sensed by the thermostat, and electrical circuitry described hereinafter is energized opening a pilot burner valve 20, thus initiating gas flow to the pilot burner.
  • an electrical igniter 18 is positioned adjacent one end 22 of the multiport pilot burner 21. As gas begins to flow from the ports 17 of the multiport pilot burner, a flame is initiated by the igniter 18 at the first end 22 of the pilot burner, and is propagated from port to port across the pilot burner 21 to its opposite end, thus providing a standing flame down the entire length thereof.
  • the exemplary apparatus has here been shown as including an electrical igniter 18 to initiate the multiport pilot burner flame, it will be understood, as the ensuing discussion proceeds, that the particular manner of initially igniting the multiport pilot burner is not critical to the present invention.
  • the main burner assembly can include an ignition burner that is a continuously burning thermally supervised safety pilot burner interlocked into the primary relay circuit which is well known to those skilled in the art.
  • flame sensing means 25 positioned, as shown, in FIGS. 3 and 4. opposite the right-hand end of the multiport pilot burner 21, which senses the presence of the multiport pilot burner flame at an adjacent end of the pilot burner.
  • This sensing means consists preferably of an ultraviolet radiation detector, which detects the presence of a flame by the ultraviolet radiation emitted.
  • Devices of this type are well known to those skilled in the art and, for example, are commercially available as the products, Honeywell Ultravision Flame Director, part No. C7027A or Electronics Corporation of America UV-l or UV2 scanners. v
  • the above-mentioned timing means 21a opens which closes the pilot burner valve 20, thereby terminating gas flow to the multiport pilot burner. Upon termination of fuel flow, the multiport pilot burner flame is, of course, extinguished.
  • gas valves 27a and 27b are electrically opened through timer 21a thereby permitting gas to flow to headers 28,30 and thence to burner assemblies 12 and 14.
  • the presence of main burner flame can be supervised and sensed continuously by the sensing means 25 after the pilot burner flow has been eliminated.
  • the sensing device 25 is mounted as shown in FIG. 4, and is aimed to sense the presence of flame just above both the pilot burner 21 and the main burner tube 16. Therefore, when flame is present on either the pilot or main burner, its presence will be sensed by the sensor 25.
  • the ultraviolet flame-sensing means 25 is positioned behind the multiport pilot burner with the ports 17 thereof disposed on the side opposite from that viewed by the sensing means. Since the ultraviolet sensory means views the flame that can be seen only from the back of the multiport pilot burner tube, the flame must be of sufficient size to extend beyond the confines of the tube 21 or gas valve 27 is not electrically opened by the appropriate signal from the sensing means and gas is not admitted to burner assembly 13. This is an additional safeguard that prevents operation where, for example, gas pressure is too low or pilot burner ports have become clogged.
  • the electrical circuitry is so arranged that, in the absence of sensed main burner flame (the pilot burner flame having previously been extinguished) gas flow to the main burner will be terminated by electrically closing the main burner gas valve 27.
  • the main burner flame should be blown out, gas flow will stop, and no unburned fuel will be al lowed to accumulate in or leak out of the furnace.
  • gas flow is initiated in burner sections 12 adjacent to the discussed section 13 in response to a signal from the timing means 21a, the signal being emitted by the timing means at the termination of the predetermined elapsed time period discussed above.
  • gas flows in the adjacent burner 12 and 14 is established, flame is propagated thereto from the main burner assembly section, preferably by propagating the flame across the bridging nipples 32 and 33.
  • multiportpilot burners and sensors can be placed on adjacent main burner assemblies and that multiple sets of the three main burner assemblies may be provided in large furnaces.
  • the thermostat delay is activated through switch CR23, which is normally closed.
  • a solenoid CR1 opens contact C1114, and closes contact CR13, CR12 and CR11, thus activating the glo-coil which, as described above, is used in igniting the pilot burner flame.
  • the ignition pilot burner switch is, simultaneously with the glo-coil, activated.
  • the normally closed contact 101 in the timer 21a allows the pilot valve to be opened so as to begin gas flow to the pilot burner. Simultaneously, the timer mechanism M begins its measuring of the above-discussed predetermined elapsed time period.
  • the connecting amplifier controls cause actuation of solenoid CR2, which opens contact CR21 and CR23, and closes contacts CR22 and CR24.
  • the closing of CR22 causes the main burner valve 27 to open, and the gas flow to the main burner to commence.
  • the closing ofCR24 allows the thermistor delay and the thermostat operating control to be temporarily shunted out of the circuit.
  • the method of initiating and insuring the presence of flame in a boiler having a plurality of burner assemblies, each assembly having a plurality of main burners, at least one multiport pilot burner having two ends and extending across a plurality of the burners in an assembly, and flame sensing means comprising the steps of: initiating pilot burner gas flame, propagating the pilot burner flame from end to end along the length of the pilot burner, sensing pilot burner flame at one end of the pilot burner, initiating main burner gas flow in a main burner assembly in response to the sensed presence of pilot burner flame at said one end, terminating gas flow to the pilot burner and extinguishing the pilot burner flame after a predetermined elapsed time while simultaneously initiating gas flow in adjacent burner assemblies, sensing continually thereafter the presence of main burner flame by said flame sensing means, and terminating gas flow to all main burners in the absence of sensed main burner flame.
  • a method according to claim 1 including the step of sensing ultraviolet radiation emanating from the pilot burner flame at one end of the pilot burner, and further including the step of sensing continually the presence of ultraviolet radiation emanating from a point behind said pilot burner opposite that side of the pilot burner upon which said pilot burner parts are disposed.
  • a method according to claim 1 including the step of igniting said pilot burner flame at an end of said pilot burner opposite said one end where said pilot burner flame is sensed.
  • a boiler having at least one assembly of a plurality of main burners, each burner having a plurality of burner ports
  • the combination comprising: at least one pilot burner having a plurality of ports and extending across a plurality of burners in the assembly, means for producing gas flow in the pilot burner for a predetermined time period only, ultraviolet radiation sensing means positioned behind the pilot burner so that the ports of said pilot burner are disposed upon an opposite pilot burner side, for determining the presence of a flame upon the pilot burner and for emitting a signal in a response thereto, so as to sense the presence of flame upon the main burner after termination of the pilot burner flame and further being capable of emitting a signal in response to the sensed presence of main burner flame, means for initiating gas flow in the main burner in response to the sensing means signal so as to cause flame upon the main burner, and means for halting main burner gas flow in the absence of main burner flame.
  • a gas-fired heater having a main burner assembly including a plurality of multiport main burners, at least one multiport pilot burner extending across a plurality of main burners for igniting main burner gas flow, and at least one ignition means for igniting pilot burner gas flow
  • the improvement comprising: ultraviolet radiation sensing means positioned behind the pilot burner so that the ports of said pilot burner are disposed upon an opposite pilot burner side for sensing the presence of pilot burner flame and for emitting a main burner gas flow initiating signal in response thereto, the ultraviolet radiation sensing means further sensing the presence of main burner flame after the extinguishment of said pilot burner flame, and means for terminating main gas burner flow in response to the absence of any sensed main burner flame after the extinguishment of the pilot burner flame.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
US855070A 1969-08-15 1969-08-15 Gas-boiler igniting system Expired - Lifetime US3617159A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85507069A 1969-08-15 1969-08-15

Publications (1)

Publication Number Publication Date
US3617159A true US3617159A (en) 1971-11-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
US855070A Expired - Lifetime US3617159A (en) 1969-08-15 1969-08-15 Gas-boiler igniting system

Country Status (9)

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US (1) US3617159A (xx)
AT (1) AT311529B (xx)
BE (1) BE754895A (xx)
CH (1) CH528052A (xx)
DE (1) DE2040745A1 (xx)
FR (1) FR2058110A5 (xx)
GB (1) GB1320578A (xx)
IE (1) IE34466B1 (xx)
NL (1) NL7011811A (xx)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747771A (en) * 1985-11-12 1988-05-31 British Gas Plc Operation of a pulse-fired burner
US4887959A (en) * 1988-11-17 1989-12-19 Rheem Manufacturing Company Gas furnace with improved ignition
US6416317B1 (en) * 1997-12-02 2002-07-09 L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Oxy-fuel burner
US20050239006A1 (en) * 2004-04-22 2005-10-27 Thomas & Betts International, Inc. Apparatus and method for providing multiple stages of fuel
US20060157232A1 (en) * 2005-01-14 2006-07-20 Thomas & Betts International, Inc. Burner port shield
US20090165778A1 (en) * 2007-12-11 2009-07-02 Garland Commercial Industries Llc Energy efficient char-broiler
US9585401B2 (en) 2004-03-23 2017-03-07 The Middleby Corporation Conveyor oven apparatus and method
US9585400B2 (en) 2004-03-23 2017-03-07 The Middleby Corporation Conveyor oven apparatus and method
US9609981B2 (en) 2009-08-28 2017-04-04 The Middleby Corporation Apparatus and method for controlling a conveyor oven
US20180038601A1 (en) * 2016-08-05 2018-02-08 Greenheck Fan Corporation Indirect gas furnace
US10024548B2 (en) 2003-02-21 2018-07-17 The Middleby Corporation Self-cleaning oven
US10920980B2 (en) 2016-06-14 2021-02-16 The Middleby Corporation Convection conveyor oven manifold and damper system
US12152786B1 (en) * 2023-11-06 2024-11-26 Modern Flames, Llc. Fireplace with flame jumping sequential log lighting

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114508767A (zh) * 2022-02-23 2022-05-17 王征 一种电子点烟器及其使用方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1404783A (en) * 1920-11-15 1922-01-31 Mckee Carolyn Burner for gas-stove ovens
US1836268A (en) * 1927-03-14 1931-12-15 Andrew E Carlsen Lighter for burners
US2072034A (en) * 1932-05-16 1937-02-23 Patrol Valve Company Gas range lighter and control
US2087433A (en) * 1932-11-01 1937-07-20 Reconstruction Finance Corp Automatic oven lighter for gas stoves
US2388124A (en) * 1942-11-19 1945-10-30 Ralph T Brackett Burner control
US2516504A (en) * 1950-07-25 Safety control and pilot indicator
US2529740A (en) * 1946-08-09 1950-11-14 Gen Controls Co Safety control system for fluid fuel burners
US2839130A (en) * 1956-06-13 1958-06-17 Clairdon Inc Photoelectric control unit for oil burners and the like
US3092168A (en) * 1959-08-06 1963-06-04 Smith Corp A O Cross lighter for a gas burner assembly
US3395968A (en) * 1967-02-13 1968-08-06 Honeywell Inc Burner control apparatus

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516504A (en) * 1950-07-25 Safety control and pilot indicator
US1404783A (en) * 1920-11-15 1922-01-31 Mckee Carolyn Burner for gas-stove ovens
US1836268A (en) * 1927-03-14 1931-12-15 Andrew E Carlsen Lighter for burners
US2072034A (en) * 1932-05-16 1937-02-23 Patrol Valve Company Gas range lighter and control
US2087433A (en) * 1932-11-01 1937-07-20 Reconstruction Finance Corp Automatic oven lighter for gas stoves
US2388124A (en) * 1942-11-19 1945-10-30 Ralph T Brackett Burner control
US2529740A (en) * 1946-08-09 1950-11-14 Gen Controls Co Safety control system for fluid fuel burners
US2839130A (en) * 1956-06-13 1958-06-17 Clairdon Inc Photoelectric control unit for oil burners and the like
US3092168A (en) * 1959-08-06 1963-06-04 Smith Corp A O Cross lighter for a gas burner assembly
US3395968A (en) * 1967-02-13 1968-08-06 Honeywell Inc Burner control apparatus

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747771A (en) * 1985-11-12 1988-05-31 British Gas Plc Operation of a pulse-fired burner
US4887959A (en) * 1988-11-17 1989-12-19 Rheem Manufacturing Company Gas furnace with improved ignition
US6416317B1 (en) * 1997-12-02 2002-07-09 L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Oxy-fuel burner
US10036558B2 (en) 2003-02-21 2018-07-31 The Middleby Corporation Self-cleaning oven
US10024548B2 (en) 2003-02-21 2018-07-17 The Middleby Corporation Self-cleaning oven
US9585400B2 (en) 2004-03-23 2017-03-07 The Middleby Corporation Conveyor oven apparatus and method
US10039289B2 (en) 2004-03-23 2018-08-07 The Middleby Corporation Conveyor oven apparatus and method
US10842156B2 (en) 2004-03-23 2020-11-24 The Middleby Corporation Conveyor oven apparatus and method
US9585401B2 (en) 2004-03-23 2017-03-07 The Middleby Corporation Conveyor oven apparatus and method
US20050239006A1 (en) * 2004-04-22 2005-10-27 Thomas & Betts International, Inc. Apparatus and method for providing multiple stages of fuel
US7494337B2 (en) * 2004-04-22 2009-02-24 Thomas & Betts International, Inc. Apparatus and method for providing multiple stages of fuel
US7726386B2 (en) 2005-01-14 2010-06-01 Thomas & Betts International, Inc. Burner port shield
US20060157232A1 (en) * 2005-01-14 2006-07-20 Thomas & Betts International, Inc. Burner port shield
US20090165778A1 (en) * 2007-12-11 2009-07-02 Garland Commercial Industries Llc Energy efficient char-broiler
US9609981B2 (en) 2009-08-28 2017-04-04 The Middleby Corporation Apparatus and method for controlling a conveyor oven
US10362898B2 (en) 2009-08-28 2019-07-30 The Middleby Corporation Apparatus and method for controlling a conveyor oven
US10920980B2 (en) 2016-06-14 2021-02-16 The Middleby Corporation Convection conveyor oven manifold and damper system
US11835229B2 (en) 2016-06-14 2023-12-05 The Middleby Corporation Convection conveyor oven manifold and damper system
US10330329B2 (en) * 2016-08-05 2019-06-25 Greenheck Fan Corporation Indirect gas furnace
US20180038601A1 (en) * 2016-08-05 2018-02-08 Greenheck Fan Corporation Indirect gas furnace
US11168898B2 (en) 2016-08-05 2021-11-09 Greenheck Fan Corporation Indirect gas furnace
US12152786B1 (en) * 2023-11-06 2024-11-26 Modern Flames, Llc. Fireplace with flame jumping sequential log lighting

Also Published As

Publication number Publication date
BE754895A (nl) 1971-01-18
IE34466L (en) 1971-02-15
DE2040745A1 (de) 1971-02-25
GB1320578A (en) 1973-06-13
AT311529B (de) 1973-11-26
CH528052A (de) 1972-09-15
FR2058110A5 (xx) 1971-05-21
NL7011811A (xx) 1971-02-17
IE34466B1 (en) 1975-05-14

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