EP0802373A2 - Brûleur d'allumage avec électrode de masse - Google Patents

Brûleur d'allumage avec électrode de masse Download PDF

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Publication number
EP0802373A2
EP0802373A2 EP97104153A EP97104153A EP0802373A2 EP 0802373 A2 EP0802373 A2 EP 0802373A2 EP 97104153 A EP97104153 A EP 97104153A EP 97104153 A EP97104153 A EP 97104153A EP 0802373 A2 EP0802373 A2 EP 0802373A2
Authority
EP
European Patent Office
Prior art keywords
pilot burner
ground electrode
electrode
injector
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.)
Withdrawn
Application number
EP97104153A
Other languages
German (de)
English (en)
Other versions
EP0802373A3 (fr
Inventor
Werner Bätz
Alfons Göppner
Manfred Felsecker
Ralf Drechsel
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.)
Rauschert & Co KG GmbH
Original Assignee
Rauschert & Co KG GmbH
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
Priority claimed from DE1996116617 external-priority patent/DE19616617A1/de
Application filed by Rauschert & Co KG GmbH filed Critical Rauschert & Co KG GmbH
Publication of EP0802373A2 publication Critical patent/EP0802373A2/fr
Publication of EP0802373A3 publication Critical patent/EP0802373A3/fr
Withdrawn legal-status Critical Current

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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 a pilot burner with an injector, ionization electrode and ground electrode.
  • pilot burners are used, for example, in gas-operated heating systems, such as gas boilers or flow heaters.
  • the fuel used in the heating system is ignited by a pilot flame that is permanently burning on the pilot burner.
  • the pilot burner's pilot light is maintained by an injector connected to a gas reservoir.
  • the ignition flame on the pilot burner is ignited by Discharge of an overvoltage between an ignition electrode arranged on the pilot burner and a ground electrode.
  • the pilot light goes out, which z. B. by an air blast, a pressure surge or a temporary interruption of the gas supply, it must be re-ignited in the aforementioned manner. If this re-ignition does not take place, the gas supply must be stopped.
  • the present invention has for its object to provide a pilot burner with injector, ionization electrode and ground electrode, in which the pilot flame is stabilized and in which the ionization currents measured via the ionization electrode are higher than in conventional pilot burners in order to achieve the highest possible functional reliability, To ensure measurement and switching accuracy, despite leakage currents that may occur.
  • the object is achieved in that a section of the ground electrode of the pilot burner of the present invention runs through the area between the injector and ionization electrode which is covered by the pilot flame.
  • the ground electrode of the pilot burner of the present invention is shaped and arranged so that the pilot flame is divided and conducted to the ionization electrode disposed thereover. This apparently stabilizes the pilot flame and reduces it Danger of the pilot flame being blown out by the pressure surge during ignition or by an air surge.
  • Another and particularly important advantage of the present invention is that the arrangement of the ground electrode shaped according to the invention has the effect that currents of approximately 3 to 4 microamps are induced in the ionization electrode by the pilot flame, which corresponds to two to three times the current strength of known devices.
  • the ground electrode of the pilot burner is an optionally bent rod.
  • the ground electrode is preferably bent in a U-shape, the U-arc preferably being curved and particularly preferably having a constant bending radius.
  • the cross section of the ground electrode of the pilot burner preferably has a cylindrical cross section, but optionally also an elypsoid or polygonal cross section. Hence, this shape of the ground electrode both stabilizes the pilot flame and increases the ionization currents induced in the ionization electrode.
  • the pilot burner preferably has an ignition electrode and is connected to a holding plate via which the individual components of the pilot burner are fastened and positioned.
  • Another preferred embodiment of the present invention has a ground electrode which is symmetrical with respect to the longitudinal axis of the injector.
  • the symmetry of the ground electrode prevents it from being deformed when heated on one side, as a result of which the ionization currents are largely constant.
  • a particularly preferred embodiment of the invention has a ground electrode of the pilot burner made of an aluminum-chromium alloy, preferably of the aluminum-chromium alloy 1.4765.
  • the thermal stability of this material ensures the highest temperature resistance and long life of the ground electrode.
  • one end of the ionization electrode of the pilot burner is arranged in the extension of the longitudinal axis of the injector above the earth strap so that the pilot flame is directed onto this end of the ionization electrode, which obviously has an advantageous effect on the level of the induced ionization current .
  • FIG. 1 shows a schematic side view of a pilot burner with injector 1, ionization electrode 2, ground electrode 3, ignition electrode 4 and holding plate 5.
  • the injector 1 consists here of a substantially cylindrical tube with a rounded top, on which side plates are arranged, which extend from a base 7 of the essentially cylindrical tube over the top of the injector to the opposite side at the level of the base 7. These plates serve on the one hand to redirect the gas flowing out of the injector outlet and thereby give the pilot flame a special shape and on the other hand to dissipate the heat generated by the pilot flame at the injector.
  • the ground electrode 3 is essentially U-shaped, the U-bend being curved with a constant bending radius, the cross-section being essentially circular and the distance between the two legs from the apex of the ground electrode to the height of the base 7 of the injector is constant and then increases in the direction of the holding plate.
  • the ends of the ground electrode 3 are attached to the holding plate 5 here.
  • the ionization electrode 2 and the ignition electrode 4 are each surrounded by insulation jackets, corresponding to 2 'and 4', which are passed through bores in the holding plate 5 and are intended to insulate the ionization electrode 2 and the ignition electrode 4 and to shield them from leakage currents.
  • the attachment of the ionization electrode 2 and the ignition electrode 4 with the corresponding insulation sheaths 2 'and 4' to the holding plate 5 is carried out by means of fastening plates 8 or 8 ', preferably made of plastic or another insulating material, which are connected to the insulation sheaths 2' and 4 ' and are riveted or screwed to the holding plate 5 via the devices 6 or 6 '.
  • FIG. 2 shows a schematic plan view of the pilot burner arrangement shown in FIG. 1 from above with injector 1, ground electrode 3 and holding plate 5, the locations at which the ionization electrode 2 and the ignition electrode 4 are arranged in this drawing only in this drawing are indicated by circles 2 'and 4'.
  • the ground electrode 3 is arranged offset in the circumferential direction to the attached plates of the injector 1 by an angle of about 45 °.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
EP97104153A 1996-04-17 1997-03-12 Brûleur d'allumage avec électrode de masse Withdrawn EP0802373A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19615100 1996-04-17
DE19615100 1996-04-17
DE19616617 1996-04-25
DE1996116617 DE19616617A1 (de) 1996-04-25 1996-04-25 Zündbrenner mit Masseelektrode

Publications (2)

Publication Number Publication Date
EP0802373A2 true EP0802373A2 (fr) 1997-10-22
EP0802373A3 EP0802373A3 (fr) 1999-07-28

Family

ID=26024803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104153A Withdrawn EP0802373A3 (fr) 1996-04-17 1997-03-12 Brûleur d'allumage avec électrode de masse

Country Status (1)

Country Link
EP (1) EP0802373A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013135666A1 (fr) 2012-03-13 2013-09-19 Bayer Intellectual Property Gmbh Réacteur à écoulement axial à base d'un alliage fe-cr-al

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2667920A (en) * 1949-12-22 1954-02-02 Honeywell Regulator Co Gas fueled pilot burner and ion sensing flame probe
US2795270A (en) * 1954-06-23 1957-06-11 Ravnsbeck Fred Safety pilot detector
DE2819075A1 (de) * 1978-04-29 1979-10-31 Dungs Karl Gmbh & Co Atmosphaerischer zuend-gasbrenner
JPH0534456U (ja) * 1991-09-30 1993-05-07 矢崎総業株式会社 バーナ燃焼装置用点火装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013135666A1 (fr) 2012-03-13 2013-09-19 Bayer Intellectual Property Gmbh Réacteur à écoulement axial à base d'un alliage fe-cr-al

Also Published As

Publication number Publication date
EP0802373A3 (fr) 1999-07-28

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