US3792959A - Method and apparatus for igniting a burner - Google Patents

Method and apparatus for igniting a burner Download PDF

Info

Publication number
US3792959A
US3792959A US00213368A US3792959DA US3792959A US 3792959 A US3792959 A US 3792959A US 00213368 A US00213368 A US 00213368A US 3792959D A US3792959D A US 3792959DA US 3792959 A US3792959 A US 3792959A
Authority
US
United States
Prior art keywords
heating element
voltage
supplying
current
igniting
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
US00213368A
Other languages
English (en)
Inventor
K Mori
T Toue
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.)
Volcano Co Ltd
Original Assignee
Volcano Co Ltd
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 Volcano Co Ltd filed Critical Volcano Co Ltd
Application granted granted Critical
Publication of US3792959A publication Critical patent/US3792959A/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
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/14—Portable igniters
    • F23Q7/20—Portable igniters with built-in mains transformer

Definitions

  • ABSTRACT A method of igniting a burner in a short period of time.
  • An igniting device which has a heating element made of carborundum provided in an outer pipe which is provided movably in the burner.
  • An electric source initially impresses upon the heating element a voltage approximately 1.5 times its rated voltage and the electric current at the secondary side of the transformer at the time when the heating element has reached the desired temperature is detected by a current relay. At this time, taps on the transformer are switched to impress the rated voltage on the element to obtain the desired igniting temperature.
  • This invention relates to an improvement in the method of igniting a burner, which uses low voltage and ensures accurate igniting of a burner in a short period of time, with little or no wear of the igniting device and which can be used safely as a portable type.
  • This invention has been made with the above defects in view and provides a new method by which a burner can be accurately ignited in a short period of time, utilizing low voltage which is free from danger in handling and involves no wearing of parts.
  • FIG. 1 is a detailed view of an igniting device which is used in igniting a burner by the method according to the present invention.
  • FIG 2 is a circuit diagram of the electric source utilized with the igniting device shown in FIG. 1.
  • FIG. 3 is a curved line diagram showing the relation between the specific resistance of a carborundum (silicon carbide) heating element and its temperature, and
  • FIG. 4 is a rising curve diagram of the temperature of the heating element.
  • the apparatus of this invention comprises a movable igniting device (carrier member) which effects ignition and an electric source which impresses the required electric current upon said igniting device.
  • the details of the igniting device and the electric source are illustrated in FIG. 1 and FIG. 2 respectively.
  • the igniting device is of the cylindrical type having a desired length which is determined by the size of the burner.
  • the cylinder is applied to one side of a terminal casing 7 which has a desired shape such as a bottomed cylinder or a box.
  • An outer pipe 2 having one or more cutouts or ports 4 is provided around the top end portion of the igniting device, in which a cap 1 is removably screwed.
  • a support member for a heating element is inserted in said outer pipe 2 and is provided in the above-mentioned terminal casing 7, through the medium of an insulated holding member 6, so that the support member 5 is insulated from the outer pipe 2.
  • a rod-shaped heating element 3 made of carborundum is adapted to be exchangeably held between a recess 1a provided at the inner side of said cap 1 and a recess 5a provided at the end of said support member 5 of the heating element.
  • These lead wires L1 and L2 are respectively connected to the electric source for effectingignition.
  • the electric source is connected to a transformer 10 via a switch 9 and a fuse F from an input terminal 8.
  • This transformer 10 has a primary winding having end taps Tb and an intermediate tap Ta.
  • a current relay contact switch 11 is provided between said taps Ta and Tb so that either tap Ta or Tb can be selected.
  • an output terminal 12 which connects to the lead wires L1 and L2 of the igniting device and a current relay 13 which detects the output current of the secondary side.
  • the characteristics of the carborandum constituting the heating element are shown in FIG. 3. From the figure it can be seen that its specific resistance changes according to the surface temperature. Specifically, the device exhibits a negative temperature coefficient (resistance decreases in proportion to the rise in temperature) up to about 800 C., but a positive temperature coefficient (resistance increases in proportion to the rise in temperature) at about 800 C. or higher. With this in view, the current relay contact 11 is connected to the intermediate tap Ta of the transformer so that the voltage applied to the heating element is about 1.5 times the voltage rating of the element, until the temperature reaches about 800 C.
  • the current relay contact 11 When igniting a burner with the above apparatus, the current relay contact 11 is first connected to the intermediate tap Ta of the transformer, whereupon a voltage about l.5 times the rated voltage is generated at the secondary side and the heating element is heated. Then, current at the secondary side of the transformer is detected by the current relay l3 and the current relay contact 11 is switched to the tap Tb. As described above, the electric relay is set at a current value which is shown when the surface temperature of the heating element reaches 800 C and at this current value, the switch is changed.
  • the rated voltage is supplied to the heating element and in l or 2 seconds, the heating element temperature reaches about l,600 C, which is the burner igniting temperature,
  • the curve of the heating element temperature in this case is shown at C in FIG. 4.
  • the curve line A in this figure shows the case when the rated voltage is supplied to the heating element initially from the beginning of the operation and the curve line B shows the case when the switch is not changed, in which case the surface temperature continues to rise and the heating element finally fuses.
  • Carborundum is employed as a heating element in the embodiment of this invention but any other substance having the same performance and action as carborundum can also be employed.
  • the characteristic of carborundum or its equivalent is utilized in such a manner that aproximately 1.5 times the rating voltage is impressed at first and when the surface temperature of the heating element reaches the desired value, the current relay detects the current value and is actuated, whereby the switch is automatically changed from the tap Ta over to the tap Tb to obtain the rated voltage.
  • this invention has such advantages that the ignition can be ensured at the low voltage of -5OV and in a short'period of time, by a simple operation and without any wearing of the heating element.
  • a method of igniting a burner with an igniting device utilizing a Carborundum heating element comprising the steps of initially supplying said heating element with a first voltage approximately equal to one and onehalf times the rated voltage of said element, sensing the electric current passing through said element, supplying said heating element with a second voltage substantially equal to the rated voltage of said element when said current reaches a predetermined value, said predetermined current value corresponding to a predetermined temperature of said heating element.
  • steps of supplying said voltages comprises providing a transformer having a primary winding with an intermediate tap and a secondary winding, and connecting said secondary winding across said heating element.
  • step of supplying said first voltage comprises connecting a voltage source to said intermediate tap of said transformer.
  • step of sensing the electric current passing through said element comprises sensing the current flowing through said secondary winding.
  • a device for igniting a burner comprising a hollow pipe member and a terminal casing supporting said pipe member at one end of said pipe member, a carborundum heating element located within said pipe member adjacent the other end thereof, means supporting said heating element, a closure means closing said other end of said pipe member, at least one hole formed in the wall of said pipe member adjacent said heating element and means for supplying electric power to said heating element.
  • said means for supplying electric power to said heating element comprises means for supplying a first voltage to said heating element, said first voltage being equal to approximately one and one-half times the rated voltage of the element, means for sensing the current flowing through said element, and means for supplying a second voltage to said element when said current reaches a predetermined value, said second voltage being substantially equal to the rated voltage of said element.
  • said means for supplying said first and second voltages comprises a transformer having a tapped primary winding, the secondary winding of said transformer being connected to said heating element.
  • said means for sensing said current comprises a current relay, said relay being adapted to be activated when said current reaches said predetermined value, said relay carrying switching means connected to said primary winding for changing the taps thereof when said current reaches said predetermined value.
  • said support means comprises an elongated support member secured to said one end of said pipe member and extending coaxially within said pipe toward said closure member at said other end of said pipe, a recess formed in the end of said supporting member and a recess formed in said closure member, said heating element being supported between said two recesses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Control Of Resistance Heating (AREA)
US00213368A 1971-08-12 1971-12-29 Method and apparatus for igniting a burner Expired - Lifetime US3792959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46061347A JPS5111558B2 (enrdf_load_stackoverflow) 1971-08-12 1971-08-12

Publications (1)

Publication Number Publication Date
US3792959A true US3792959A (en) 1974-02-19

Family

ID=13168496

Family Applications (1)

Application Number Title Priority Date Filing Date
US00213368A Expired - Lifetime US3792959A (en) 1971-08-12 1971-12-29 Method and apparatus for igniting a burner

Country Status (3)

Country Link
US (1) US3792959A (enrdf_load_stackoverflow)
JP (1) JPS5111558B2 (enrdf_load_stackoverflow)
GB (1) GB1377525A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322604A (en) * 1977-05-24 1982-03-30 Isuzu Motors Limited Engine start assisting device

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5321068B2 (enrdf_load_stackoverflow) * 1973-10-22 1978-06-30
JPS5337992B2 (enrdf_load_stackoverflow) * 1974-02-19 1978-10-12
BR7506276A (pt) * 1974-10-10 1976-08-31 Lubrizol Corp Processo para lubrificacao de metal durante o processamento do mesmo,peca de trabalho;composicao que prove lubrificacao a superficies de metal;e processo para aplicacao a uma peca de trabalho de uma composicao de processamento de metal
JPS5821678B2 (ja) * 1974-12-03 1983-05-02 トウアネンリヨウコウギヨウ カブシキガイシヤ ジドウシヤエンジンヨウゴウセイジユンカツユソセイブツ
JPS5173504A (ja) * 1974-12-23 1976-06-25 Toa Nenryo Kogyo Kk Junkatsuyusoseibutsu
JPS6039715B2 (ja) * 1975-01-27 1985-09-07 東亜燃料工業株式会社 合成潤滑油組成物
DE2963478D1 (en) * 1978-06-29 1982-09-30 Morganite Electroheat Ltd Igniter
RU2172896C2 (ru) * 1999-03-23 2001-08-27 Зислин Григорий Семенович Система управления горением топлива

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2858403A (en) * 1956-04-23 1958-10-28 Carborundum Co Silicon carbide immersion heating device
US3372305A (en) * 1966-04-15 1968-03-05 Carborundum Co Silicon carbide igniter
US3562590A (en) * 1969-03-17 1971-02-09 Robertshaw Controls Co Electric igniter construction

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4716313U (enrdf_load_stackoverflow) * 1971-03-20 1972-10-25

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2858403A (en) * 1956-04-23 1958-10-28 Carborundum Co Silicon carbide immersion heating device
US3372305A (en) * 1966-04-15 1968-03-05 Carborundum Co Silicon carbide igniter
US3562590A (en) * 1969-03-17 1971-02-09 Robertshaw Controls Co Electric igniter construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322604A (en) * 1977-05-24 1982-03-30 Isuzu Motors Limited Engine start assisting device

Also Published As

Publication number Publication date
GB1377525A (en) 1974-12-18
JPS5111558B2 (enrdf_load_stackoverflow) 1976-04-12
JPS4827867A (enrdf_load_stackoverflow) 1973-04-12

Similar Documents

Publication Publication Date Title
US3792959A (en) Method and apparatus for igniting a burner
US2349849A (en) Gas tube relay circuits
US2315916A (en) Electric welding system
US2175900A (en) knight
US2351969A (en) Protective device for electrical apparatus
US2523020A (en) Magnetic starting system for electric discharge devices
US2330312A (en) Starting and operating fluorescent and mercury arc lamps
US2299094A (en) Electrical apparatus
US2158885A (en) Electric valve circuit
US1337245A (en) Rehealing process for condensers
US3474290A (en) Ignition circuit for an arc-discharge lamp and devices therefor
US2315926A (en) Electric valve circuit
US2340131A (en) Welding
US2836702A (en) Hermetically sealed electrical discharge device
ES457959A1 (es) Dispositivo para la produccion de impulsos de corriente paraencender y estabilizar el arco electrico en los procesos de arco.
US2342673A (en) Fuse blowing device for igniter tubes
US2300853A (en) Control circuit for gaseous electric discharge lamps
US2152998A (en) Circuit for gaseous electric discharge devices
GB1573679A (en) Arrangements including electrical heating elements
SU486390A1 (ru) Размыкатель электрического тока
US2397966A (en) Electrical apparatus
US2554837A (en) Time delay control apparatus
US2459795A (en) Method and apparatus for electric welding
US3132320A (en) Electric thermal device
US2104680A (en) Enclosed arc device