EP0821199B1 - Positive Sicherheitsvorrichtung der Gaszufuhr in einem Brenner - Google Patents

Positive Sicherheitsvorrichtung der Gaszufuhr in einem Brenner Download PDF

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Publication number
EP0821199B1
EP0821199B1 EP97401758A EP97401758A EP0821199B1 EP 0821199 B1 EP0821199 B1 EP 0821199B1 EP 97401758 A EP97401758 A EP 97401758A EP 97401758 A EP97401758 A EP 97401758A EP 0821199 B1 EP0821199 B1 EP 0821199B1
Authority
EP
European Patent Office
Prior art keywords
burner
flame
signal
voltage
oscillator
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
EP97401758A
Other languages
English (en)
French (fr)
Other versions
EP0821199A1 (de
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 EP0821199A1 publication Critical patent/EP0821199A1/de
Application granted granted Critical
Publication of EP0821199B1 publication Critical patent/EP0821199B1/de
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
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical 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
    • F23N2227/36—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
    • F23N5/02—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
    • 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

Definitions

  • the present invention relates to a device for positive securing intended to control functions of safety around a burner, 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, this which prohibits the functioning of the thermal system and, on the other hand, that if the flame goes out, the gas continues to be diffused by the burner.
  • the present invention intends to remedy these disadvantages of presenting an electronic device flame ignition on a burner, detection of said flame and gas intake control in the burner, whose consumption is so low that it can be supplied by electric batteries.
  • the device which is the subject of the invention includes a positive safety electronic assembly, for lighting and controlling the flame of a burner.
  • the device allows the ignition of a burner main using an ignition burner. He commands ignition of the main burner only when the flame is present at the ignition burner.
  • Electronic assembly powered by batteries, sparks, checks presence of flame and positively feeds a solenoid valve which allows the admission of gas to the burner main. This assembly applies to the burner ignition with non-permanent ignition burner.
  • the invention firstly relates to a device for positive burner safety for flame ignition, flame detection and gas inlet control characterized in that it comprises a means of admission of gas which lets gas pass to a burner only when a voltage difference between its terminals is higher than the supply voltage, and in that it has a power supply circuit suitable for apply between the terminals of the gas inlet means a higher voltage 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.
  • any circuit failure supply causes the voltage across the terminals to drop the means of gas admission below the voltage power supply and therefore the voltage which is suitable for its opening.
  • the gas inlet is therefore protected against failure or short circuit in the supply circuit.
  • the device according to the present invention comprises means chimney backflow detection device suitable for opening the supply circuit of the gas inlet means during detection of a backflow, the difference in voltages between the terminals of the gas inlet means being, when of the closure of the detection means, less than the opening voltage of the gas inlet means.
  • the tension between the electrodes are used both to light a flame, producing a spark, and detecting the presence of flame.
  • a flame ionizes the material between the electrodes and that this material ionized behaves electrically like a diode, i.e. that it allows the passage of electrons only in a direction.
  • the signal leaving the control means is adapted to reduce the frequency of the oscillator when the signal coming out of the comparator is representative of the presence of a flame between said two electrodes.
  • the outgoing signal from the control means is adapted to reduce the output voltage of the oscillator when the signal leaving the comparator is representative of the presence of a flame between said two electrodes.
  • the electricity consumption of the device is very reduced since the ignition phase, which is the largest consumer of energy, is very short and then the operation of the device serves to test the operation of a heating system.
  • the circuit power supply includes a switching power supply current regulation, which provides an opening current a gas intake means. Thanks to these provisions, the energy required to control the intake means of gas is low enough that a battery can power it for several months, in operation normal.
  • a power source of electronic circuits is made up of electric batteries.
  • the invention also relates to a heating means, water heater or boiler, for example, characterized in that it includes a device as briefly described 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 inlet of gas 2 and thermally connected to a fluid circuit 6 from the fluid inlet 3 to the fluid outlet 4.
  • An electronic circuit 7 is supplied by a power supply 8, is connected to a means of flame presence detection 11 placed near the output of an ignition burner 14, to an ignition means of flame 9 placed at the outlet of the ignition burner 14, at a gas inlet means 25 placed between the gas inlet 2 and the burner 5 and to a draw-off switch 13.
  • the thermal installation 1 is, for example, consisting of a water heater or boiler, of types known.
  • the burner 5 is suitable for mixing air with gas from gas inlet 2, via gas intake means 25, to ensure good combustion of the mixture thus formed and to evacuate the gases burned by a chimney 12.
  • the burner 5 is of the type known.
  • 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.
  • 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 tank of gas, or connected to a gas distribution network.
  • the electronic circuit 7 is presented, according to several embodiments in FIGS. 2, 3 and 5.
  • the power supply 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 near the outlet 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 flame ignition means 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, or to prohibit this traffic, when closed.
  • the drawing switch 13 is controlled by the water flow in circuit 6, according to techniques known which are not detailed here.
  • the electronic circuit 7, which will now be described with reference to Figures 2, 3 and 5, controls the means flame ignition 9 and a gas inlet means 10 as a function of the signal leaving the detection means of flame 11.
  • the switching power supplies 24 and 27 provide voltages higher than the voltage of the voltage source. In the event of a fault, the solenoid valve 25 cannot therefore be accidentally ordered.
  • drawing switch at the top of the figure 2, represents a means of energizing the circuit Figure 2. It controls a drawing switch 13 (figure 1) which makes the ignition request.
  • FIGs 3 and 4 relate to an installation thermal where the main burner 5 is directly lit by the ignition means 9 and the flame on this burner is controlled by the flame detection means 11.
  • circuit breaker 30 comprising two TR3 and TR4 transistors, associated resistors and a fuse F1, is connected to an input of the power supply 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 C20 capacity is charged up to the first predetermined value of the comparator oscillator 23, the system can only be unlocked by stopping the drawing.
  • a power authorization circuit maximum 31 consisting of an operational amplifier IC2-e, receives the same signal as the comparator oscillator 23 and outputs a signal to the power supply to current regulated switching 27 whose diagram is simplified in Figure 3.
  • the simplification of the switching power supply 27, shown in Figure 3 corresponds to a variant of electronic diagram of the power presented in figure 2.
  • This variant has the advantage of being able to be connected to the mains.
  • the electronic circuit 7 presented opposite the figure 5 is specifically adapted to the installation thermal 1 presented with reference to FIG. 6.
  • Figure 6 shows a third type thermal installation incorporating a device according to the present invention, in which, in comparison with Figure 1, two solenoid valves 42 and 43 (presented in FIG. 5) replace the solenoid valve 25, and in which an electronic circuit 7, as presented in FIG. 5, controls said solenoid valves 42 and 43, depending on the electrical signals and switch positions corresponding to backflow protection, on request ignition or draw, and the ignition electrode.
  • circuit IC2-c TR50 is used, 51, 61, D61, or another similar circuit for order the second solenoid valve or supply the current for the large valve.
  • a comparator IC2-c which detects the passage of the signal flame at the voltage characteristic of a presence of flame and authorizes the operation of the second booster.
  • the second booster (simplified in diagram 2) can be set to a fixed current or be controlled by a regulation system (see Vréfl order on diagram 1).
  • the power supply circuit comprising the two switching power supplies 24 and 27 is suitable for applying between the terminals of the intake means of gas consisting of the solenoid valve 25, 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)
  • Feeding And Controlling Fuel (AREA)
  • Spray-Type Burners (AREA)

Claims (8)

  1. Positive Sicherheitsvorrichtung für einen Brenner (5) zur Entzündung der Flamme, zur Erfassung der Flamme und zur Gaszufuhrsteuerung, die ein Gaszufuhrmittel (25,42,43) zu dem Brenner (5) umfasst, das von einer elektrischen VersorgungsSchaltung (7,24,27) gespeist wird, dadurch gekennzeichnet, dass:
    das genannte Gaszufuhrmittel (25,42,43) Gas zu dem Brenner nur hindurchlässt, wenn eine Spannungsdifferenz zwischen seinen Klemmen höher als die Versorgungsspannung ist;
    die genannte elektrische Versorgungsschaltung (7,24,27) zwischen den Klemmen des Gaszufuhrmittels (25,42,43) eine höhere Spannung als die Spannung am Ausgang der Versorgungsquelle (8) derart anlegen kann, dass eine mögliche Fehlfunktion der Versorgungsschaltung (7) den Gasdurchgang durch das Gaszufuhrmittel hindurch verhindert
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sie ein Erfassungsmittel für einen Kaminstau (SRC) umfasst, das die Versorgungsschaltung des Gaszufuhrmittels (25,42,43) bei Erfassung eines Staus öffnen kann, wobei die Spannungsdifferenz zwischen den Klemmen des Gaszufuhrmittels beim Schließen des Erfassungsmittels (SRC) niedriger als die Öffnungsspannung des Gaszufuhrmittels (25,42,43) ist.
  3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass sie umfasst:
    einen Oszillator (20,21), der ein Wechselsignal zwischen zwei Elektroden (11,5,14) erzeugt, die nahe einem Brenner (5.14) angeordnet sind, wobei Funken zwischen diesen zwei Elektroden eine Flamme an dem Brenner entzünden können, und die Flamme den Zwischenraum zwischen den zwei Elektroden ionisiert;
    einen Vergleicher (23), der ein für die Spannung zwischen den genannten zwei Elektroden repräsentatives Signal erhalten und es mit einer Bezugsspannung vergleichen kann; und
    ein Steuerungsmittel (11) für den Oszillator, das das Ausgangssignal des Vergleichers berücksichtigt.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Steuerungsmittel die Oszillatorfrequenz verringern kann, wenn das Ausgangssignal des Vergleichers für die Gegenwart einer Flamme zwischen den genannten zwei Elektroden repräsentativ ist.
  5. Vorrichtung nach einem der Ansprüche 3 oder 4, dadurch gekennzeichnet, dass das Steuerungsmittel die Ausgangsspannung des Oszillators verringern kann, wenn das Ausgangssignal des Vergleichers für die Gegenwart einer Flamme zwischen den genannten zwei Elektroden repräsentativ ist.
  6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Versorgungsschaltung eine Booster-Stromreglung (IC2-d, TR50, TR51, TR61, D61, L61, IC3, VRef1) umfasst, die einen Offnungsstrom für das Gaszufuhrmittel (25,42,43) bereitstellt.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass eine Energiequelle (8) für die elektronischen Schaltungen von elektrischen Batterien gebildet ist.
  8. Heizvorrichtung, dadurch gekennzeichnet, dass sie eine Vorrichtung nach einem der Ansprüche 1 bis 7 umfasst.
EP97401758A 1996-07-25 1997-07-22 Positive Sicherheitsvorrichtung der Gaszufuhr in einem Brenner Expired - Lifetime EP0821199B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9609372 1996-07-25
FR9609372A FR2751730B1 (fr) 1996-07-25 1996-07-25 Dispositif de securisation positive d'admission de gaz dans un bruleur

Publications (2)

Publication Number Publication Date
EP0821199A1 EP0821199A1 (de) 1998-01-28
EP0821199B1 true EP0821199B1 (de) 2000-11-15

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Application Number Title Priority Date Filing Date
EP97401758A Expired - Lifetime EP0821199B1 (de) 1996-07-25 1997-07-22 Positive Sicherheitsvorrichtung der Gaszufuhr in einem Brenner

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EP (1) EP0821199B1 (de)
AT (1) ATE197639T1 (de)
DE (1) DE69703519T2 (de)
ES (1) ES2153169T3 (de)
FR (1) FR2751730B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6050281A (en) * 1997-06-27 2000-04-18 Honeywell Inc. Fail-safe gas valve system with solid-state drive circuit
CN101614586B (zh) * 2009-07-21 2011-03-30 深圳和而泰智能控制股份有限公司 一种离子火焰检测装置及其设备
DE102010021348B4 (de) * 2010-05-22 2012-08-02 Robert Bosch Gmbh Heizgerät mit einer Überwachungseinrichtung, Überwachungseinrichtung und Verfahren zu ihrem Betreiben
DE102017204056B4 (de) 2017-03-13 2023-06-29 Robert Bosch Gmbh Brennersystem zum Verbrennen eines Brennstoff-Luft-Gemischs sowie Heizkessel mit einem Brennersystem
IT201800005549A1 (it) * 2018-05-21 2019-11-21 Apparecchio di riscaldamento con bruciatore a gas combustibile

Family Cites Families (6)

* 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
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
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
US4770629A (en) * 1987-03-11 1988-09-13 Honeywell Inc. Status indicator for self-energizing burner control system

Also Published As

Publication number Publication date
ES2153169T3 (es) 2001-02-16
DE69703519D1 (de) 2000-12-21
EP0821199A1 (de) 1998-01-28
DE69703519T2 (de) 2001-06-07
FR2751730A1 (fr) 1998-01-30
ATE197639T1 (de) 2000-12-15
FR2751730B1 (fr) 1998-10-09

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