US3561900A - Igniter system - Google Patents

Igniter system Download PDF

Info

Publication number
US3561900A
US3561900A US805719A US3561900DA US3561900A US 3561900 A US3561900 A US 3561900A US 805719 A US805719 A US 805719A US 3561900D A US3561900D A US 3561900DA US 3561900 A US3561900 A US 3561900A
Authority
US
United States
Prior art keywords
burner
burners
capacitor
triggering
circuit
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
US805719A
Other languages
English (en)
Inventor
Lyman H Walbridge
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.)
Fenwal Inc
Original Assignee
Fenwal 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 Fenwal Inc filed Critical Fenwal Inc
Application granted granted Critical
Publication of US3561900A publication Critical patent/US3561900A/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
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks

Definitions

  • the electronic igniter system disclosed herein employs a high voltage spark generating circuit which is adapted to provide igniting sparks to a plurality of burners when any one of the burners is turned on, but not lit.
  • the spark generating circuit can be triggered into operation by any one of a plurality of triggering circuits, there being one triggering circuit for each burner.
  • This invention relates to igniter systems and more particularly to an electronic igniter system adapted for use with a plurality of burners.
  • the igniter system of the present invention is adapted for use with a plurality of burners.
  • a high voltage spark generating circuit is provided which includes a spark coil and a triggerable semiconductor current switching device interconnected with the coil. The spark generating circuit is operative to generate igniting sparks adjacent the burners when the switching device is triggered.
  • the system also includes a plurality of timing capacitors, one for each of the burners, and a plurality of charging circuits, one for each capacitor, for applying a charging current to the respective capacitor.
  • a plurality of triggering circuits, one for each capacitor, are provided for triggering the switching device when the voltage on the respective capacitor reaches a predetermined level.
  • a respective means associated with each burner shunts the respective capacitor when the fuel supply to that burner is turned otf or when a flame is present at that burner. Accordingly, the spark generating circuit is energized to generate igniting sparks when any one of the burners is turned on but not lit.
  • the single ligure is a schematic circuit diagram of an igniter system according to the present invention.
  • a plurality of conventional gas burners are indicated at 11-14. Fuel is provided to these burners through a common supply line or pipe 17 and respective valves 21-24. The burners are assumed to -be electrically grounded as indicated at 27. Associated with each of the valves 21-24 is a respective switch S1- S4. Each switch is mechanically coupled to the respective valve in such a way that the switch is opened when the 0 valve is opened to admit fuel to the burner and is closed when the valve is closed. One side of each switch is grounded as indicated.
  • a high voltage spark generating circuit is indicated generally at 29.
  • This circuit includes a spark coil 30 having a pair of primary windings W1 and W2 and a pair of secondary windings W3 and W4 and also includes an SCR (silicon controlled rectier) Q1.
  • the anode-cathode circuit of SCR Q1 is interconnected with the primary windings W1 and W2 in a series circuit which includes an energy storage capacitor CE, the cathode of the SCR and one side of the capacitor being grounded as indicated.
  • the spark generating circuit is energized through a pair of supply leads L1 and L2 which may be connected to any appropriate A.C. source, e.g., conventional volt 60-cycle supply mains.
  • the lead L2 is assumed to be grounded as indicated.
  • Charging current is supplied to capacitor CE from lead L1 through a current-limiting resistor RL and a rectifying diode D1.
  • triggering SCR Ql will generate a high voltage pulse across each of the spark coil secondary windings W3 and W4, as is understood.
  • the ends of the secondary windings W3 and W4 are connected to respective electrodes 31-34 which are positioned adjacent respective ones of the burners 11-14. Each electrode thus denes, with the respective burner, a spark gap adjacent that burner. Accordingly, the high voltage pulse generated across each secondary winding when the SCR Q1 is triggered causes an igniting spark to be produced adjacent each burner.
  • Each charging circuit comprises a respective resistor R1-R4.
  • the resistors R1-R4 are preferably of relatively high value.
  • Each of the capacitors C1-C4 is connected, through a respective neon lamp N1-N4, to the gate of SCR Q1.
  • neon lamps N1-N4 are voltage breakdown devices which will conduct only after the voltage applied thereto exceeds a predetermined threshold and will cease conducting only when the applied voltage drops to a substantially lower level.
  • a triggering pulse is applied to the gate of SCR Q1.
  • the gate-cathode circuit of the SCR is shunted by a resistor R6 for bleeding ott any leakage currents.
  • each capacitor C1-C4 and the respective charging resistor R1-R4 is connected to the ungrounded side of a respective one of the switches S1-S4.
  • respective timing capacitor C1-C4 is discharged or shunted by the switch.
  • each timing capacitor C1-C4 and its respective charging resistor R1-R4 is also connected to an electrode 41-44 associated with the respective burner 11-14.
  • the electrodes 41-44 employ this principle for ame sensing, each of the electrodes being positioned relative to the respective burner so that a conductive path to ground is established when the burner is lit. As may be seen, this conductive path shunts the respective timing capacitor C1-C4.
  • the electrode and switch associated with each burner together form a control circuit for shunting the respective capacitor when the fuel supply to that burner is turned off or when the flame is present. Thus, in either case the respective capacitor is prevented from charging.
  • An alternate method of preventing each capacitor from charging when the fuel supply to the respective burner is cut off is to place a normally open switch in series with each charging resistor, the switch lbeing closed lwhen the respective valve is opened.
  • the energy storage capacitor CE and the respective timing capacitor C1-C4 will recharge after each spark discharge and the cycle will repeat indefinitely. However, if the burner which is turned on ignites, as may be expected in normal operation, the flame present at the rburner will prevent the respective timing capacitor from again recharging due to the shunting conduction path established through the ionized gases from the respective sensing electrode 41-44.
  • the spark generating circuit is energized when any one of the burners is turned on but not lit. This is true even though other of the burners may already be turned on and lit. In other words, the spark generating circuit will be deenergized only if all the burners are either turned off or ignited.
  • the present invention may also be used with single 'burners which are of such size that it is desirable to provide flame sensing and ignition at several different points v or locations.
  • the separate switches for preventing charging of the dilerent timing capacitors may be omitted and a single switch for deenergizing the entire circuit may be used.
  • the phrase a plurality of burner locations should be understood to mean diifer ent points on a single burner as well as a plurality of separate burners.
  • An igniter system for a plurality of burner locations comprising:
  • a high voltage spark generating circuit including a spark coil and a triggerable semiconductor current switching device interconnected with said coil, for generating igniting sparks adjacent said burner locations when said switching device is triggered;
  • timing capacitors one for each burner location
  • a plurality of charging circuits one for each of said capacitors, for selectively applying a charging current to the respective capacitor
  • a plurality of triggering circuits one for each of said capacitors, for triggering said switching device when the voltage on the respective capacitor reaches a predetermined level
  • a respective means associated with each burner location for preventing charging of the respective timing capacitor when a llame is present at that burner location whereby said spark generating circuit is energized when any burner location is not ignited.
  • An igniter system as set forth in claim 2 including a supply circuit for charging said energy storage capacitor, said supply circuit having a rectifying diode whereby said energy storage capacitor can be charged from an A.C.
  • each of said charging circuits includes a resistor of re1- atively high value.
  • each of said triggering circuits comprises a neon lamp connecting the respective timing capacitor to the gate of said SCR.
  • An igniter system for a plurality of burners comprising:
  • a high voltage spark generating circuit including a spark coil and a triggerable semiconductor current switching device interconnected with said coil, for generating igniting sparks adjacent said burners when said switching device is triggered;
  • timing capacitors one for each of said burners
  • a plurality of triggering circuits one for each of said capacitors, for triggering said switching device when the voltage on the respective capacitor reaches a pre' determined level
  • a respective means associated with each burner for preventing charging of the respective timing capacitor when the fuel supply to that burner is turned olf or a flame is present at that burner whereby said spark generating circuit is energized when any burner is turned on but not lit.
  • each of said burners is selectively supplied with fuel through a respective valve and wherein each of said means for preventing charging of a respective timing capacitor includes a switch for shunting that capacitor, which switch is opened when the respective valve is opened.
  • each of said means for preventing charging of a respective timing capacitor includes at least one electrode adjacent the respective burner for providing a shunting conduction path through the burner flame when the burner is lit.
  • An igniter system for a plurality of burners comprising:
  • a high voltage spark generating circuit including a spark coil, an energy storage capacitor and a triggerable semiconductor current switching device for discharging said capacitor into said coil thereby to generate igniting sparks adjacent said burners when said switching device is triggered;
  • a plurality of charging circuits each of which includes a resistor of relatively high value, for applying charging currents to respective ones of said capacitors;
  • triggering circuits each of which includes a voltage breakdown device, for triggering said switching device when the voltage on a respective one of said capacitors reaches a predetermined level
  • a respective means including at least one electrode adjacent the respective burner, for shunting the respective timing capacitor when a llame is present at the respective burner whereby said spark generating circuit is energized when any burner is turned on but not lit.
  • An igniter system for a plurality of burners comprising:
  • At least one spark coil having at least one secondary 6 winding interconnected with said spark gap defining means
  • timing capacitors one for each of said burners
  • a respective charging circuit including a resistor of relatively high value for applying a charging current to each timing capacitor
  • a respective neon lamp connecting each timing capacitor to the gate of said SCR thereby to trigger said SCR when the voltage on the respective timing capacitor reaches a predetermined level

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Control Of Combustion (AREA)
  • Generation Of Surge Voltage And Current (AREA)
US805719A 1969-03-10 1969-03-10 Igniter system Expired - Lifetime US3561900A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80571969A 1969-03-10 1969-03-10

Publications (1)

Publication Number Publication Date
US3561900A true US3561900A (en) 1971-02-09

Family

ID=25192329

Family Applications (1)

Application Number Title Priority Date Filing Date
US805719A Expired - Lifetime US3561900A (en) 1969-03-10 1969-03-10 Igniter system

Country Status (4)

Country Link
US (1) US3561900A (https=)
JP (1) JPS5025659B1 (https=)
FR (1) FR2037895A5 (https=)
GB (1) GB1240957A (https=)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710192A (en) * 1971-06-18 1973-01-09 Gen Electric Burner ignition system
US3813581A (en) * 1973-09-21 1974-05-28 Cam Stat Inc Spark igniter for a plurality of gas burners
JPS5142172U (https=) * 1974-09-20 1976-03-29
US4115069A (en) * 1976-06-18 1978-09-19 Midori Anzen Company, Ltd. Sequential ignition system for oxygen generation elements
US6126435A (en) * 1996-10-11 2000-10-03 Vitromatic Comercial, S.A. De C.V. Electronic ignition system for a gas stove
US20070224557A1 (en) * 2006-03-22 2007-09-27 I-Hua Huang Controller for re-igniting
US20150128926A1 (en) * 2013-11-14 2015-05-14 Lennox Industries Inc. Multi-burner head assembly
US20150132703A1 (en) * 2013-11-14 2015-05-14 Lennox Industries Inc. Double venturi burner
CN107355817A (zh) * 2017-07-20 2017-11-17 熊秀 一种低能量单次电火花产生方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009105094A1 (en) 2008-02-20 2009-08-27 Utc Fire & Security Corporation Assisted commissioning method for combustion control systems

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710192A (en) * 1971-06-18 1973-01-09 Gen Electric Burner ignition system
US3813581A (en) * 1973-09-21 1974-05-28 Cam Stat Inc Spark igniter for a plurality of gas burners
JPS5142172U (https=) * 1974-09-20 1976-03-29
US4115069A (en) * 1976-06-18 1978-09-19 Midori Anzen Company, Ltd. Sequential ignition system for oxygen generation elements
US6126435A (en) * 1996-10-11 2000-10-03 Vitromatic Comercial, S.A. De C.V. Electronic ignition system for a gas stove
US20070224557A1 (en) * 2006-03-22 2007-09-27 I-Hua Huang Controller for re-igniting
US20150128926A1 (en) * 2013-11-14 2015-05-14 Lennox Industries Inc. Multi-burner head assembly
US20150132703A1 (en) * 2013-11-14 2015-05-14 Lennox Industries Inc. Double venturi burner
US10480823B2 (en) * 2013-11-14 2019-11-19 Lennox Industries Inc. Multi-burner head assembly
CN107355817A (zh) * 2017-07-20 2017-11-17 熊秀 一种低能量单次电火花产生方法
CN107355817B (zh) * 2017-07-20 2019-06-04 西安爱邦电磁技术有限责任公司 一种低能量单次电火花产生方法

Also Published As

Publication number Publication date
JPS5025659B1 (https=) 1975-08-26
GB1240957A (en) 1971-07-28
FR2037895A5 (https=) 1970-12-31

Similar Documents

Publication Publication Date Title
US3681001A (en) Fluid fuel igniter control system
US4893564A (en) Electric detonator of delay type
US3425780A (en) Fluid fuel igniter control system
US5269282A (en) Misfire detector for use in internal combustion engine
US3853455A (en) Burner control apparatus
US3561900A (en) Igniter system
US6805109B2 (en) Igniter circuit with an air gap
US3377125A (en) Electrical ignition system for gaseous fuel burners and the like
US3861854A (en) Flame monitoring system
US4145180A (en) Ignition system for fuel burning apparatus
US3632285A (en) Gas igniter system
US3662185A (en) Spark generator and components therefor
US3847533A (en) Flame ignition and supervision system
US3529910A (en) Reignite system
US3619097A (en) Safety timed burner control system
US3441356A (en) Pulsed spark gas ignition and fuel control system
US3349284A (en) Spark generating circuit having a voltage doubler and solid state control components
US4038019A (en) Fail-safe energizing circuit for a functional device
US3718423A (en) Automatic fuel ignition system
US3806305A (en) Solid state spark ignition circuit with automatic shut-off
US4329628A (en) Relaxation oscillator type spark generator
US4231732A (en) Gas burner control system
US3142332A (en) Gas burner ignition system
US6647974B1 (en) Igniter circuit with an air gap
US3514240A (en) Fluid fuel ignition control system

Legal Events

Date Code Title Description
AS Assignment

Owner name: KIDDE, INC.

Free format text: MERGER;ASSIGNORS:HIMP-2 INC.;HIMP-2 INC. (CHANGED TO);REEL/FRAME:005046/0017

Effective date: 19880331

Owner name: FENWAL INCORPORATED, A CORP. OF DE, MASSACHUSETTS

Free format text: NUNC PRO TUNC ASSIGNMENT;ASSIGNOR:KIDDE, INC.;REEL/FRAME:005004/0713

Effective date: 19880402

AS Assignment

Owner name: BLOOM-1 INC., A CORP. OF DE

Free format text: MERGER;ASSIGNOR:KIDDE INC.;REEL/FRAME:005359/0391

Effective date: 19880331