EP0997688A2 - Pilotflammenbrenner mit einem Luftdetektor - Google Patents

Pilotflammenbrenner mit einem Luftdetektor Download PDF

Info

Publication number
EP0997688A2
EP0997688A2 EP99500156A EP99500156A EP0997688A2 EP 0997688 A2 EP0997688 A2 EP 0997688A2 EP 99500156 A EP99500156 A EP 99500156A EP 99500156 A EP99500156 A EP 99500156A EP 0997688 A2 EP0997688 A2 EP 0997688A2
Authority
EP
European Patent Office
Prior art keywords
flame
burner
faucet
thermocouple
support plate
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.)
Withdrawn
Application number
EP99500156A
Other languages
English (en)
French (fr)
Other versions
EP0997688A3 (de
Inventor
Joaquin J. Antxia Uribetxebarria
Maite Amozarrain Atxa
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.)
Fagor Electrodomesticos SCL
Original Assignee
Fagor Electrodomesticos SCL
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 Fagor Electrodomesticos SCL filed Critical Fagor Electrodomesticos SCL
Publication of EP0997688A2 publication Critical patent/EP0997688A2/de
Publication of EP0997688A3 publication Critical patent/EP0997688A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q9/00—Pilot flame igniters
    • F23Q9/02—Pilot flame igniters without interlock with main fuel supply
    • F23Q9/04—Pilot flame igniters without interlock with main fuel supply for upright burners, e.g. gas-cooker burners

Definitions

  • the present invention relates to pilot gas burners for ignition, which at the same time act as safety devices for controlling the main burner combustion by means of a thermocouple.
  • Pilot flame burners need a high proportion of air in the burning mixture in order to maintain a stable ignition flame. Pilot flame burners that have a safety thermocouple to sense a pressure drop in the supply gas possess an additional flame for heating the thermocouple, which requires a proportion of gas close to the mixture rating. If the safety thermocouple is also an atmospheric sensor, it needs the heating flame to be supplied with a close proportion of air in the burning mixture in order to detect the deflexion of air oxygen. Pilot burners that only sense the atmosphere have a separate sensing flame independent of the ignition flame, which is released from the faucet due to the close proportion of air in the mixture and ceases to heat the thermocouple when the oxygen content of the atmosphere drops. For this reason pilot burners with a safety thermocouple have a fork in the mixture pipe with two outlet faucets, one for each flame, each with a secondary air intake aperture to obtain two separate flames.
  • ES-8405127-A (EP-100758) describes a pilot burner with a safety device for a gas burner that senses the deflexion of air oxygen for the burning mixture, for example below 18.5%. It has a single spout outlet faucet and a mixing chamber with two primary air inlet holes, which produces two separate flames, one for heating the thermocouple in the outlet faucet and the other for ignition on the spout outlet, with an intermediate secondary air intake between the two flames.
  • ES-U0182081 (FR-U2145168) describes a burner with a pilot flame, with a faucet that is made of metal plate and formed from the gas ducting pipe.
  • the faucet has a baffle plate to deflect a second flame, which issues at an angle aimed at a safety thermocouple.
  • the ignition plug and the thermocouple are carried by the same burner support plate and both stand out parallel from it in the vertical direction.
  • the plug is inserted in the air intake aperture, where the flame is generated.
  • the thermocouple only senses the lack of fuel through the absence of a flame, so the gas and the primary air for burning are mixed in a air suction aperture, at the place where the faucet starts widening from the tube. If the oxygen content of the room atmosphere dropped below a minimum permissible proportion, for example 18.5%, the thermocouple of this pilot burner would not detect the anomalies, because the burning mixture may be enriched through the air intake aperture, which is where the flame is generated.
  • the object of the invention is a pilot flame burner for igniting a domestic stove or water heater, fitted with a safety thermocouple, as defined in claim 1.
  • the pilot flame burner with a safety thermocouple senses both the deflexion of oxygen and the drop in the burning gas pressure in the main burner supply.
  • the simultaneous sensing of both combustion anomalies is possible by means of a flame faucet, which in the former case the part of the flame that heats the thermocouple is released, whereas in the latter case the flame contracts.
  • the pilot burner according to the invention has a faucet formed with metal plate, which stems from a cylindrical tube that conveys the burning mixture to the pilot burner, and is configured to obtain a single open flame which is aimed at and reaches both the main burner for its ignition, as well as the head of the safety thermocouple.
  • a single open flame which is aimed at and reaches both the main burner for its ignition, as well as the head of the safety thermocouple.
  • a burning mixture is obtained in a lower chamber of the burner body through a primary air intake
  • the burner is also provided with a secondary air intake aperture for combustion, which is situated in a tubular extension of the body.
  • the flame originates from the secondary air intake opening to be used both for igniting the main stove burner and for sensing the deflexion of the atmosphere.
  • This aperture has an area calculated for the intake of a volume of atmospheric air so that the amount of air of the end mixture that is ignited is in the right proportion for the stoichiometry of combustion.
  • FIG. 1 is an elevational view of the pilot burner with an atmospheric sensing flame, in accordance with the invention.
  • FIG. 2 and FIG. 3 are plan and profile views respectively of the pilot burner of figure 1.
  • a preferred embodiment of burner 1 comprises a vertical tubular body 2 made for instance of brass carried on a support plate 8, the safety thermocouple 9 and the ignition plug 10 carried on the same support plate 8, and pointing in a vertical direction parallely to body 2.
  • the burner body 2 At its lower end the burner body 2 has a gas injection tube 3, the mixing chamber 6 and a burning mixture venturi tube 4, which is connected at the top to a shapeable plate tube, which conveys the mixture to the flame faucet 11.
  • the primary atmospheric air for the mixture enters from the calibrated holes 5 on the mixing chamber 6.
  • the mixture ducting tube is bent to the height of the support plate 8 forming a portion 7 a of tube angled for the orientation of the faucet 11, which is flat and has a neck 17 in the middle to form two fluted parts 11a and 11b with rounded outlets.
  • the aperture 16 for the secondary air intake is in the angled tube portion 7 a , while the flame is generated from here, and is configured afterwards through faucet 11, which produces the form of a single, divergent and open flame 15 with two flame zones 15 a and 15 b , the former as shown in fig.
  • thermocouple 9 is of longer reach to direct itself towards the main burner, gradually separating from the thermocouple 9, whereas flame zone 15 b has a tip that reaches the head of the thermocouple 9 for its precise heating, since without a sufficient supply of oxygen in the air, it has to be released, in order the thermocouple 9 to be cooled.
  • the aperture 16 takes in a smaller amount of air due to the lower speed of the mixture, and flame zone 15 b contracts and is diverted upwards away from its orientation towards the head of the thermocouple.
  • the faucet 11 For the widthwise extent of the flame 15, the faucet 11 has an angle of divergence 13 (fig.2), for example of 30° (degrees).
  • the faucet 11 For the directing of the two flames zones 15 a and 15 b , the faucet 11 as it is viewed in its elevational position (fig.1), has a tilt angle 12 relative to the horizontal plane of the support plate 8 , for instance of 13 degrees, so as to direct the flame towards the head of the thermocouple 9, and as it is viewed from a lateral side (fig. 3), it has a tilt angle 14, for example of 26 degrees, which makes it possible to control the precise heating of the thermocouple (9) to detect a drop in gas pressure.
  • the aperture 16 for the secondary air intake is extended (fig. 1) below the faucet up to the end of the outlets 11 a and 11 b (fig.3).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Control Of Combustion (AREA)
EP99500156A 1998-10-30 1999-09-06 Pilotflammenbrenner mit einem Luftdetektor Withdrawn EP0997688A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES9802752U 1998-10-30
ES9802752U ES1041207Y (es) 1998-10-30 1998-10-30 Quemador de llama piloto con detector atmosferico.

Publications (2)

Publication Number Publication Date
EP0997688A2 true EP0997688A2 (de) 2000-05-03
EP0997688A3 EP0997688A3 (de) 2003-03-26

Family

ID=8306300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99500156A Withdrawn EP0997688A3 (de) 1998-10-30 1999-09-06 Pilotflammenbrenner mit einem Luftdetektor

Country Status (2)

Country Link
EP (1) EP0997688A3 (de)
ES (1) ES1041207Y (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2145168A7 (de) 1971-07-05 1973-02-16 Junkers & Co
EP0100758A2 (de) 1982-08-03 1984-02-15 OFFICINE DI PERNUMIA di Giancarlo de' STEFANI & C. S.a.s. Sicherheitseinrichtung für Gaswärmeeinrichtungen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048216A (en) * 1959-07-20 1962-08-07 Baso Inc Gas burner
GB2299193B (en) * 1995-03-21 1999-09-22 Willey Robinson Ltd Testing device for gas pilot light

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2145168A7 (de) 1971-07-05 1973-02-16 Junkers & Co
EP0100758A2 (de) 1982-08-03 1984-02-15 OFFICINE DI PERNUMIA di Giancarlo de' STEFANI & C. S.a.s. Sicherheitseinrichtung für Gaswärmeeinrichtungen

Also Published As

Publication number Publication date
EP0997688A3 (de) 2003-03-26
ES1041207Y (es) 1999-10-16
ES1041207U (es) 1999-06-16

Similar Documents

Publication Publication Date Title
US7766006B1 (en) Dual fuel vent free gas heater
US4239481A (en) Double orifice vortex burner for low or high Wobbe fuels
US7566218B2 (en) Burner assembly
USRE46308E1 (en) Dual fuel heater
US8057219B1 (en) Dual fuel vent free gas heater
AP1090A (en) Burner.
EP0997688A2 (de) Pilotflammenbrenner mit einem Luftdetektor
US20020197579A1 (en) Lighter of multiple torch flames
US5133657A (en) High turndown sheet metal atmospheric gas burner
US3825398A (en) Plural rate burner with flame enhancement
US9188334B2 (en) Dual fuel heater
US8118590B1 (en) Dual fuel vent free gas heater
US1843361A (en) Gas burner
US3298420A (en) Pilot flash tube ignition system
US1688487A (en) Gas-burner igniter
US2898979A (en) Gas-fueled burner
JP2002538402A (ja) 酸素減少センサ
US5769623A (en) Oil fired burner
US3376862A (en) Double burner fuel control system
EP0382893A1 (de) Detektor für Brenner
EP2527736A2 (de) Gasbrenner
US2612943A (en) Gas burner
US20100323312A1 (en) Electrically operated gas/oil burner
RU148944U1 (ru) Газовая дутьевая горелка
US2854069A (en) Gas burner construction

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20030515

AKX Designation fees paid

Designated state(s): DE ES FR GB IT PT

17Q First examination report despatched

Effective date: 20041004

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20050215