EP0821198B1 - Dispositif de sécurisation de brûleur pour allumage de flamme, détection de flamme et commande d'admission de gaz - Google Patents

Dispositif de sécurisation de brûleur pour allumage de flamme, détection de flamme et commande d'admission de gaz Download PDF

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Publication number
EP0821198B1
EP0821198B1 EP97401757A EP97401757A EP0821198B1 EP 0821198 B1 EP0821198 B1 EP 0821198B1 EP 97401757 A EP97401757 A EP 97401757A EP 97401757 A EP97401757 A EP 97401757A EP 0821198 B1 EP0821198 B1 EP 0821198B1
Authority
EP
European Patent Office
Prior art keywords
burner
flame
signal
oscillator
safety device
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
EP97401757A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0821198A1 (fr
Inventor
René Remaud
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 EP0821198A1 publication Critical patent/EP0821198A1/fr
Application granted granted Critical
Publication of EP0821198B1 publication Critical patent/EP0821198B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/02—Starting or ignition cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/22—Pilot burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/36—Spark ignition, e.g. by means of a high voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/14—Fuel valves electromagnetically operated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/16—Fuel valves variable flow or proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/18—Groups of two or more valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements

Definitions

  • the present invention relates to a device for burner safety for flame ignition, detection of flame and gas intake control, for example in a boiler or water heater.
  • Burners require safety devices to avoid on the one hand that the flame remains absent from the burner, which prohibits the operation of the thermal system and, on the other except that if the flame goes out, the gas will not continues to be diffused by the burner.
  • the U.S. Patent No. 4,167,767 provides a device gas burner ignition, flame detection and gas inlet control, in which the flame is lit by means of sparks produced by an oscillator between two electrodes placed near the burner.
  • This device includes a comparator which receives a signal representative of the voltage between the two electrodes and which compare this voltage to a first setpoint voltage, so as to interrupt the production of sparks (and therefore save energy) when the voltage between electrodes is less than said first voltage of setpoint, which is interpreted as signaling the presence flame on the burner.
  • the present invention intends to remedy these disadvantages of presenting an electronic device igniting a flame on a burner, detecting said flame and gas intake control in the burner, whose consumption is so low that it can be supplied by electric batteries, and offering a high level of security.
  • the device which is the subject of the invention comprises a positive security electronic assembly, allowing light and control the flame of a burner.
  • the device allows ignition of a main burner using a burner ignition, in which case the device does not control the ignition of the main burner only when the flame is present at ignition burner.
  • the electronic assembly supplied with batteries, sparks, check for flame and positively feeds a solenoid valve which allows the gas inlet to the main burner. This montage applies to burner ignition with ignition burner non permanent.
  • the present invention provides a burner safety device for ignition of flame, flame detection and gas intake control, conventionally comprising a spark generator which includes an oscillator adapted to produce a signal alternating between two electrodes placed near said burner so as to produce sparks between said two electrodes, said sparks being adapted to ignite a flame on the burner.
  • this device burner safety device further comprises, on the one hand, a window oscillator comparator suitable for receiving a signal representative of the voltage between the two electrodes and at compare said signal to two set voltages, and other share a gas inlet means into the burner which is controlled by said window oscillator comparator in depending on the result of said comparison.
  • the device burner securing device comprises a switching power supply suitable for supplying a solenoid valve forming part of said means for admitting gas into the burner, or a switching power supply with regulation of current suitable for supplying the same solenoid valve or a second solenoid valve.
  • the device comprises these two power supplies both, and the regulated switching power supply current is only used to briefly provide full power required to bring the solenoid valve into position open, which saves battery power.
  • one of the two electrodes is consisting of the burner.
  • the realization of the device is simplified and the positioning of the elements forming a diode between the electrodes, does not pose any difficulty.
  • the signal from said oscillator control means used to produce sparks is suitable, when the signal coming out of said comparator is representative of the presence of a flame between the two electrodes, to reduce the frequency with which said oscillator is operated, said control means can also be constituted by a simple resistance.
  • the average output voltage of the oscillator is reduced, and the power consumption of the device is very weak since the ignition phase, which is the largest consumer of energy, is very short, and that, following the ignition phase, the operation of the device is only used to test the flame present on the burner.
  • said oscillator used to produce sparks has a primary transformer and a transistor adapted to generate together test signals. Others say special features, this oscillator has a secondary transformer and a capacitor suitable for jointly generate flame ignition sparks between the two electrodes.
  • said generator of sparks preferably includes a spark gap.
  • the energy required to the control of the gas inlet means is sufficient weak so that a battery can power it for several months, in normal operation.
  • no connection to the area is only required and installation is greatly simplified since there is no more electrical installation to provide.
  • the invention also relates to a means of heating, water heater or boiler for example, characterized in that it includes a device as succinctly set out above.
  • FIG. 1 shows a thermal installation 1, comprising a gas inlet 2, a fluid inlet 3, a fluid outlet 4 and a burner 5 connected to the gas inlet 2 and thermally connected to a fluid circuit 6 from the fluid inlet 3 to the fluid outlet 4.
  • the flame presence detection means 11 is connected to electrode 9, which therefore ensures production sparks for igniting the flame and serving at the same time to detect the presence of flame.
  • the thermal installation 1 is, for example, constituted a water heater or a boiler, of known types.
  • the burner 5 is suitable for mixing air with gas coming from the gas inlet 2, via the means gas intake 25, to ensure proper combustion of the mixture thus formed and to evacuate the burnt gases by a chimney 12.
  • the burner 5 is of known type.
  • Main burner 5 is lit by a burner ignition 14 whose flame is lit by the means flame ignition 9 and on which the presence of a flame is detected by the flame detection means 11, said flame ignition burner 14 also serving, according to a mode of preferred embodiment of the invention, second electrode 45.
  • the fluid for example water, which circulates between the fluid inlet 3, where it is at a given temperature, and the fluid outlet 4, where it was heated by the flame of the burner 5, then runs through a circuit which depends on thermal installation 1.
  • the gas inlet 2 is either connected to a gas tank, is connected to a gas distribution network.
  • Food electric 8 preferably comprises an electric battery or an electric accumulator. However, it can, possibly be supplemented by the electrical sector.
  • the flame presence detection means 11 placed at near the output of the ignition burner 14 is adapted to emit a signal representative of the presence or the absence of a flame at the burner outlet 5.
  • the means flame ignition 9 placed at the burner outlet ignition 14 is suitable for lighting a flame at the outlet of the burner 5.
  • the gas inlet means 25 placed between the gas inlet and the burner 5 is suitable either to leave pass gas from gas inlet 2 to the burner 5, when open, either to prohibit this circulation, when closed.
  • the drawing switch 13 is controlled by the flow of water in circuit 6, according to known techniques which do not are not detailed here.
  • the electronic circuit 7, which will now be described with reference to Figures 2, 3 and 5, controls the ignition means flame 9 and a gas inlet means 10 depending on the signal leaving the flame detection means 11.
  • the switching power supplies 24 and 27 supply voltages higher than the voltage of the voltage source. In case of failure, the solenoid valve 25 cannot therefore be accidentally ordered.
  • the circuit marked "draw-off switch”, at the top of the figure 2, represents a means of energizing the circuit of the figure 2. It controls a drawing switch 13 (figure 1) making the ignition request.
  • Figures 3 and 4 relate to a thermal installation where the main burner 5 is directly lit by the means ignition 9 and the flame on this burner is controlled by the flame detection means 11.
  • the burner main 5 which also acts as second electrode 45.
  • circuit breaker 30 comprising two transistors TR3 and TR4, resistors associated and an F1 fuse, and which is connected to an input of food 24.
  • the circuit breaker 30 provides, together with a capacity C20 of the window oscillator comparator 23, the locking the device when the burner is not on before the C20 capacity is charged until the first predetermined value of the oscillator comparator 23, the system can only be unlocked by stopping the drawing.
  • timing means 26 is not part of this embodiment of the electronic circuit 7.
  • a maximum power authorization circuit 31 consisting of an operational amplifier IC2-e, receives the same signal as the oscillator comparator 23 and emits a signal to regulated switching power supply stream 27, the diagram of which is simplified in FIG. 3.
  • the simplification of the switching power supply 27, shown in Figure 3 corresponds to a variant diagram power supply electronics shown in Figure 2.
  • This variant has the advantage of being able to be connected to the sector.
  • the electronic circuit 7 illustrated in FIG. 5 is specifically adapted to the thermal installation 1 illustrated in figure 6.
  • Figure 6 shows a third type of installation thermal incorporating a device according to this invention, in which, in comparison with FIG. 1, two solenoid valves 42 and 43 (shown in Figure 5) replace the solenoid valve 25, and in which a circuit electronics 7, as shown in figure 5, control said solenoid valves 42 and 43, depending on the signals switch positions corresponding to anti-backflow safety, upon request for ignition or drawing, and to the ignition electrode.
  • the circuit IC2-d / TR50 / TR51 / TR61 / D61 or another similar circuit for controlling the second solenoid valve 42 (or supply the current for the large valve).
  • the second "boost" 27 (simplified in FIG. 5) can be set to a fixed current or be controlled by a system current regulation (see in figure 2 the control of the voltage Vref at the terminals of the Zener diode 46).
  • the electrical supply circuit comprising the two switching power supplies 24 and 27 is suitable for apply between the terminals of the gas inlet means consisting of the solenoid valve 25 or the solenoid valves 42 and 43, a voltage higher than the output voltage of the source power supply, so that a possible malfunction of said supply circuit prevents the gas passage through the gas inlet means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Feeding And Controlling Fuel (AREA)
EP97401757A 1996-07-25 1997-07-22 Dispositif de sécurisation de brûleur pour allumage de flamme, détection de flamme et commande d'admission de gaz Expired - Lifetime EP0821198B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9609371 1996-07-25
FR9609371A FR2751729B1 (fr) 1996-07-25 1996-07-25 Dispositif de securisation de bruleur pour allumage de flamme, detection de flamme et commande d'admission de gaz

Publications (2)

Publication Number Publication Date
EP0821198A1 EP0821198A1 (fr) 1998-01-28
EP0821198B1 true EP0821198B1 (fr) 2001-12-12

Family

ID=9494474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97401757A Expired - Lifetime EP0821198B1 (fr) 1996-07-25 1997-07-22 Dispositif de sécurisation de brûleur pour allumage de flamme, détection de flamme et commande d'admission de gaz

Country Status (5)

Country Link
EP (1) EP0821198B1 (es)
AT (1) ATE210802T1 (es)
DE (1) DE69708990T2 (es)
ES (1) ES2169329T3 (es)
FR (1) FR2751729B1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100420901C (zh) * 2006-07-21 2008-09-24 宁波方太厨具有限公司 一种具有意外熄火后自动再点火功能的燃气灶

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7944678B2 (en) 2008-09-11 2011-05-17 Robertshaw Controls Company Low voltage power supply for spark igniter and flame sense
DE102017104526A1 (de) 2017-03-03 2018-09-06 Viessmann Werke Gmbh & Co Kg Verfahren zur Bestimmung der Ursache einer Fehlzündung am Brenner eines Heizkessels
DE102019134702A1 (de) * 2019-12-17 2021-06-17 Rational Aktiengesellschaft Gasbrennersystem, Gargerät und Verfahren zum Betreiben eines Gasbrennersystems
CN115077106B (zh) * 2022-06-06 2024-03-08 宁波方太厨具有限公司 感应装置及燃气热水器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167767A (en) * 1976-07-15 1979-09-11 Bicosa Societe De Recherches Flame or spark detection system and combustible gas ignition device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890579A (en) * 1974-03-04 1975-06-17 Itt Ignition system and components thereof
US3877864A (en) * 1974-07-29 1975-04-15 Itt Spark igniter system for gas appliance pilot ignition
US4145180A (en) * 1977-11-29 1979-03-20 Essex Group, Inc. Ignition system for fuel burning apparatus
JPS56130533A (en) * 1980-03-18 1981-10-13 Matsushita Electric Ind Co Ltd Combustion controller
JPS5733721A (en) * 1980-08-09 1982-02-23 Matsushita Electric Ind Co Ltd Driving device for solenoid valve in combustion equipment
US4521180A (en) * 1982-11-29 1985-06-04 Kidde, Inc. Laboratory burner apparatus
FR2544055B1 (fr) * 1983-04-07 1988-01-22 Const Elect Rv Generateur de courant pour l'alimentation et la detection de fonctionnement d'un bruleur a gaz et dispositif de commande et de controle en faisant application
JPS62123222A (ja) * 1985-11-25 1987-06-04 Gasutaa:Kk 燃焼安全装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167767A (en) * 1976-07-15 1979-09-11 Bicosa Societe De Recherches Flame or spark detection system and combustible gas ignition device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100420901C (zh) * 2006-07-21 2008-09-24 宁波方太厨具有限公司 一种具有意外熄火后自动再点火功能的燃气灶

Also Published As

Publication number Publication date
FR2751729A1 (fr) 1998-01-30
EP0821198A1 (fr) 1998-01-28
ATE210802T1 (de) 2001-12-15
DE69708990D1 (de) 2002-01-24
ES2169329T3 (es) 2002-07-01
FR2751729B1 (fr) 1998-10-09
DE69708990T2 (de) 2002-08-01

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