EP0021937B1 - Mécanisme de sécurité électromagnétique - Google Patents

Mécanisme de sécurité électromagnétique Download PDF

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Publication number
EP0021937B1
EP0021937B1 EP19800400825 EP80400825A EP0021937B1 EP 0021937 B1 EP0021937 B1 EP 0021937B1 EP 19800400825 EP19800400825 EP 19800400825 EP 80400825 A EP80400825 A EP 80400825A EP 0021937 B1 EP0021937 B1 EP 0021937B1
Authority
EP
European Patent Office
Prior art keywords
armature
core
rod
magnetic
turns
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
Application number
EP19800400825
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0021937A1 (fr
Inventor
Jean-Marie Nisot
Georges Berenfeld
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.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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 Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Publication of EP0021937A1 publication Critical patent/EP0021937A1/fr
Application granted granted Critical
Publication of EP0021937B1 publication Critical patent/EP0021937B1/fr
Expired 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
    • F23Q9/08—Pilot flame igniters with interlock with main fuel supply
    • F23Q9/12—Pilot flame igniters with interlock with main fuel supply to permit the supply to the main burner in dependence upon existence of pilot flame
    • F23Q9/14—Pilot flame igniters with interlock with main fuel supply to permit the supply to the main burner in dependence upon existence of pilot flame using electric means, e.g. by light-sensitive elements
    • 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
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/107—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using mechanical means, e.g. safety valves

Definitions

  • the invention relates to a magnet cartridge for a thermoelectric ignition safety device.
  • thermoelectric ignition safety devices which are used to cut off the supply of gas to an appliance in the event of the extinction of a burner or pilot flame, include, as we know, a two-pole electromagnet or magnetic core as well that an armature plate mounted at one end of a rod whose other end carries either a valve or a cup depending on whether the mechanism is intended to shut off a gas flow directly or via levers.
  • a protective cap made of non-magnetizable metal (such as brass) or plastic.
  • the magnetic core is rigidly fixed to a plate.
  • the armature is fixed on the rod with a certain clearance allowing it to articulate with respect to the two poles of the magnetic core during the operating movements of the gas appliance in which the electromagnetic safety device is incorporated.
  • This frame is generally formed by a single thin plate.
  • the armature and the movable member are independent with respect to each other and as a function of the magnetic flux of the electromagnet, said movable member moves on the valve stem and actuates a contact.
  • the object of the invention is therefore to modify the air gap in order to increase or decrease the consumption of ampere-turns in order to obtain different switching and tripping currents.
  • the armature fixed to the end of the control rod of a valve and / or the two branches of the core are each made in two adjoining parts which are inseparable from each other, made of magnetic material , and superimposed to form an air gap between them.
  • the safety mechanism as shown generally comprises a magnetic core 2, an armature, generally designated by the reference 1, mounted at one end of the rod 3, and at the opposite end of this rod, a valve 4 for the direct closure of a gas flow.
  • This valve can be replaced by a cup if the mechanism has to act on a shutter member by means of levers.
  • the core 2 is rigidly fixed by a rivet or by a contact rivet 5 on the seat 6.
  • This contact rivet is crossed by the end wire 7 of the excitation winding 8 of the core 2.
  • a protective cap 9 covers the core 2 and its frame 1.
  • a return spring 10 bearing on the cap covers the rod 3 and acts on the valve 4.
  • the magnetic core 2 is formed of two branches 20 and 21 each made in two parts 20a and 21a for the formation of an additional air gap.
  • the frame 1 is made up of two small pieces of magnetic material 1a and 1b superimposed and of small thickness. These two plates are either free or fixed to each other by any mechanical means, for example by crimping with a slight tightening, by gluing or by spot welding, and are each pierced with a central orifice 11, the diameter is slightly greater than the diameter of the end 12 of the rod 3.
  • the end 12 of the rod 3 is crimped onto the lower plate 1a of the armature 1 so that there remains a clearance allowing the armature to articulate with respect to the two poles of the core 2, this is that is to say that the armature can be applied perfectly on these poles by compensating for any misalignment of the normal rod to the magnetic core.
  • an elastic O-ring 14 which is slightly crushed at the moment is interposed between the rear of the plate 1b and the metallic circular washer 13 coaxial with the rod. of the crimping of the rod.
  • the lower plate 1a When the armature 1 is held against the core 2, the lower plate 1a is traversed by a constant and limited magnetic flux, depending on its thickness. Since said plate becomes saturated very quickly and offers a very high magnetic reluctance, part of the flux is forced to pass on the one hand to the air gap located between the two plates 1a and 1 of the frame 1 and on the other hand the air gap formed on the two branches 20 and 21 of the core 2, which results in a significant increase in the ampere-turns consumed, and consequently of the interlocking and tripping currents.
  • This increase is a function of the thicknesses chosen for the plates 1a and 1b of the reinforcement, their surface condition and the type of material used. In fact, depending on the interlocking and tripping currents that it is desired to obtain, it is possible to increase or decrease the thickness of the plates making up the frame, to use plates of different thicknesses, or else different surface states. It is also possible to use only the air gap formed between the two plates of the frame or only the air gap formed on the branches of the magnetic core.
  • This embodiment therefore makes it possible to vary the consumption of ampere-turns in order to obtain engagement and tripping currents suitable for all uses.
  • the invention is not limited to the illustrated embodiment but also encompasses the constructive variants.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnets (AREA)
EP19800400825 1979-06-13 1980-06-09 Mécanisme de sécurité électromagnétique Expired EP0021937B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7915094 1979-06-13
FR7915094A FR2458732A1 (fr) 1979-06-13 1979-06-13 Mecanisme de securite electromagnetique

Publications (2)

Publication Number Publication Date
EP0021937A1 EP0021937A1 (fr) 1981-01-07
EP0021937B1 true EP0021937B1 (fr) 1983-03-09

Family

ID=9226530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800400825 Expired EP0021937B1 (fr) 1979-06-13 1980-06-09 Mécanisme de sécurité électromagnétique

Country Status (3)

Country Link
EP (1) EP0021937B1 (Direct)
DE (1) DE3062267D1 (Direct)
FR (1) FR2458732A1 (Direct)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109539259A (zh) * 2018-11-22 2019-03-29 宁波好点烟具有限公司 一种可灭火的喷火枪
CN109539260A (zh) * 2018-11-22 2019-03-29 宁波好点烟具有限公司 一种多功能喷火枪

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103712246B (zh) * 2013-12-26 2015-12-30 潘兆铿 一种家用燃气灶用的自动熄火保护装置
CN111878616B (zh) * 2020-08-03 2021-11-05 宁波方太厨具有限公司 灶具阀体

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2268960A (en) * 1940-04-15 1942-01-06 William A Ray Fluid control valve and electromagnetic operator therefor
US2881830A (en) * 1954-04-05 1959-04-14 Baso Inc Electromagnetic control system
DE1223979B (de) * 1961-04-08 1966-09-01 Kromschroeder Ag G Thermoelektrisch gesteuertes halbautomatisches Sicherheitsventil fuer zwei oder mehrBrennstellen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109539259A (zh) * 2018-11-22 2019-03-29 宁波好点烟具有限公司 一种可灭火的喷火枪
CN109539260A (zh) * 2018-11-22 2019-03-29 宁波好点烟具有限公司 一种多功能喷火枪
CN109539260B (zh) * 2018-11-22 2021-11-09 宁波好点烟具有限公司 一种多功能喷火枪
CN109539259B (zh) * 2018-11-22 2021-11-09 宁波好点烟具有限公司 一种可灭火的喷火枪

Also Published As

Publication number Publication date
FR2458732A1 (fr) 1981-01-02
EP0021937A1 (fr) 1981-01-07
DE3062267D1 (en) 1983-04-14
FR2458732B3 (Direct) 1982-04-09

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