EP1739351A1 - Stromversorgungsschaltung eines Sicherheitsventils für den Zündvorgang eines Gasbrenners - Google Patents

Stromversorgungsschaltung eines Sicherheitsventils für den Zündvorgang eines Gasbrenners Download PDF

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Publication number
EP1739351A1
EP1739351A1 EP05014136A EP05014136A EP1739351A1 EP 1739351 A1 EP1739351 A1 EP 1739351A1 EP 05014136 A EP05014136 A EP 05014136A EP 05014136 A EP05014136 A EP 05014136A EP 1739351 A1 EP1739351 A1 EP 1739351A1
Authority
EP
European Patent Office
Prior art keywords
power supply
supply circuit
capacitor
safety valve
circuit according
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.)
Granted
Application number
EP05014136A
Other languages
English (en)
French (fr)
Other versions
EP1739351B1 (de
Inventor
Jose Maria Lasa Elexpuru
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.)
Orkli SCL
Original Assignee
Orkli 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 Orkli SCL filed Critical Orkli SCL
Priority to EP05014136A priority Critical patent/EP1739351B1/de
Priority to ES05014136T priority patent/ES2311185T3/es
Priority to AT05014136T priority patent/ATE404824T1/de
Priority to DE602005008934T priority patent/DE602005008934D1/de
Publication of EP1739351A1 publication Critical patent/EP1739351A1/de
Application granted granted Critical
Publication of EP1739351B1 publication Critical patent/EP1739351B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/102—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/004—Using semiconductor elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/10—Arrangement or mounting of ignition devices
    • F24C3/103—Arrangement or mounting of ignition devices of electric ignition devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2223/00—Signal processing; Details thereof
    • F23N2223/22—Timing network
    • F23N2223/26—Timing network with capacitors

Definitions

  • the present invention refers to auxiliary power supply circuits used in safety valves that are powered by a thermocouple.
  • thermocouples powered by thermocouples for their use in gas burners are known.
  • the thermocouple actuates the safety valve keeping it open while the flame is lit. If the flame goes out, the safety valve closes, cutting off the flow of gas.
  • the safety feature combination formed by the safety valve and the thermocouple gives way to an intrinsically safe device, because any type of failure in said safety group causes the safety valve to close and therefore gas flow is cut off.
  • thermocouple alone is capable of keeping the safety valve open.
  • the first possible solution to this problem is to require the user to keep the pushbutton switch depressed when lighting the gas burner.
  • the safety valve will remain open until the thermocouple acquires the minimum temperature necessary to keep the safety valve open while the flame is lit.
  • a second solution is to add an auxiliary power supply circuit that provides the safety valve with the necessary power to keep it open when the gas burner is activated.
  • EP1113227A2 describes a device used in the ignition of a gas burner that comprises a safety valve.
  • Said device comprises a power supply circuit, connected to the safety valve, which actuates the valve keeping it open once the gas burner has been ignited.
  • Said power supply circuit is connected to source voltage by a switch that is operated by a timer. Accordingly, the power supply circuit is connected to source voltage for the time necessary for the thermocouple to actuate the safety valve alone.
  • EP1113227A2 solves this safety problem by adding a fuse that burns if the time that the power supply circuit is connected to source voltage exceeds a predetermined maximum time.
  • One problem with this solution is that it is hard to establish said predetermined maximum time.
  • Another problem is that when the fuse burns, it has to be replaced.
  • the object of the invention is to provide a safety valve power supply circuit for the ignition of a gas burner that safeguards its own failures.
  • the power supply circuit which is used with safety valves that are powered by a thermocouple flame detector, comprises conditioning means for processing an input signal to convert it into an output signal capable of actuating the safety valve to keep it open. Said input signal is generated by the energy stored in a capacitor, which charges in the same instant that the gas burner is lit.
  • the power supply circuit of the invention is a simple and low cost circuit.
  • the power supply circuit 1 which actuates safety valve 2 and is powered by a thermocouple 3 that detects flame, comprises conditioning means 4 for converting an input signal E into an output signal S that is capable of maintaining the safety valve 2 open.
  • Said input signal E is generated by the energy stored in a capacitor 5.
  • circuit 1 charges at the moment the gas burner is lit.
  • circuit 1 comprises a switch 6 that connects the capacitor 5 with source voltage Vr at the moment the user lights the burner and disconnects it immediately after. More specifically, to activate the burner, the user presses a pushbutton switch 7, using the switch 6 to connect the capacitor 5 to source voltage Vr for the instant that the pushbutton switch 7 remains pressed.
  • circuit 1 comprises a spark generator 8 that is also activated by the switch 6.
  • circuit 1 comprises a switch 6' that alternately connects the capacitor 5 to the source voltage Vr and to the conditioning means 4.
  • the switch 6' is used to connect the capacitor 5 to source voltage Vr at the moment the user ignites the burner, and immediately following, it connects it to the conditioning means 4.
  • the user presses a pushbutton 7 and through switch 6' connects capacitor 5 to source voltage Vr when pushbutton 7 is pressed.
  • circuit 1 when circuit 1 supplies a plurality of safety valves 2, 2a, 2b,... and 2n, said circuit 1 comprises a switch 6', 6'a, 6'b,... and 6'n for each safety valve 2, 2a, 2b,... and 2n. Said switches 6', 6'a, 6'b,... and 6'n are connected, as shown in figure 3, in such a way that capacitor 5 charges when any of the burners is ignited. Additionally, said capacitor 5 connects to the conditioning means 4 only when none of the switches 6', 6'a, 6'b,... and 6'n is connecting the capacitor 5 to source voltage Vr.
  • the conditioning means comprise a regulator block 10 that receives the input signal E, an oscillator block 11, a transformer 12 and a rectifier 13 that generates the output signal S.
  • the conditioning means 4 also comprise a rectifier and limiter block 9 that is used to charge the capacitor 5.
  • the rectifier and limiter block 9 comprises a Zener diode D1 with a transistor Q1 connected as an emitter follower so that said transistor Q1 conducts only until the capacitor 5 reaches a determined voltage Vc.
  • the three embodiments of the conditioning means 4 shown in figures 5, 6, and 7 comprise an oscillator block 11 that receives an input signal generated by the capacitor 5, a transformer 12 that receives the signal from said oscillator 11, and a rectifier 13 that receives the output signal from the transformer 12 and generates the output signal S that the corresponding safety valve 2 receives.
  • the embodiments of figures 5 and 6 also comprise a regulator block 10 through which a decreasing voltage is generated from the input signal E.
  • the oscillator block 11 receives said decreasing voltage. Accordingly, the energy supplied by circuit 1 to the corresponding safety valve 2 is greater in the beginning and declines progressively.
  • the rectifier 13 comprises a diode D for each safety valve 2.
  • the rectifier 13 comprises a bi-polar transistor Q for each safety valve 2.
  • the transformer 12 comprises two coils: a first coil 12a supplies the safety valve and a second coil 12b is used to excite the base of every transistor Q.
  • the voltage drop is reduced from 0.6 V in the diodes to 0.15 V in the transistors. Losses are reduced in the same proportion, and therefore, a capacitor 5 with between two and three times less capacitance can be used.
  • the rectifier 13 comprises a MOSFET transistor Q' with low resistance between source and drain for each safety valve 2.
  • the MOSFET transistors Q' need a gate signal generating circuit 14.
  • transformer 12 also comprises a second coil 12b, which in this case is used to power the gate signal generating circuit 14.
  • MOSFET transistors With MOSFET transistors, the voltage drop is reduced to 10 mV. Losses are reduced in respect to the two preceding embodiments, and therefore, a capacitor 5 of lower capacitance can be used.
  • the transformer 12 could be used in an inductance mode. In this way, when the primary of said transformer 12 receives energy, the MOSFET transistors Q' are cut off. When the supply to the primary is shut off, the MOSFET transistors Q' enter into conduction as a consequence of the reaction of the transformer 12 for releasing its magnetic energy.
  • the functioning in inductance mode allows the regulator block 10 to be done away with and enables the oscillator block 11 to receive the input signal E directly. Thus, losses produced in block 10 are eliminated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
EP05014136A 2005-06-30 2005-06-30 Gasbrenner mit Stromversorgungsschaltung eines Sicherheitsventils für den Zündvorgang des Gasbrenners Not-in-force EP1739351B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP05014136A EP1739351B1 (de) 2005-06-30 2005-06-30 Gasbrenner mit Stromversorgungsschaltung eines Sicherheitsventils für den Zündvorgang des Gasbrenners
ES05014136T ES2311185T3 (es) 2005-06-30 2005-06-30 Quemador de gas con un circuito de alimentacion de una valvula de seguridad para el encendido de dicho quemador de gas.
AT05014136T ATE404824T1 (de) 2005-06-30 2005-06-30 Gasbrenner mit stromversorgungsschaltung eines sicherheitsventils für den zündvorgang des gasbrenners
DE602005008934T DE602005008934D1 (de) 2005-06-30 2005-06-30 Gasbrenner mit Stromversorgungsschaltung eines Sicherheitsventils für den Zündvorgang des Gasbrenners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05014136A EP1739351B1 (de) 2005-06-30 2005-06-30 Gasbrenner mit Stromversorgungsschaltung eines Sicherheitsventils für den Zündvorgang des Gasbrenners

Publications (2)

Publication Number Publication Date
EP1739351A1 true EP1739351A1 (de) 2007-01-03
EP1739351B1 EP1739351B1 (de) 2008-08-13

Family

ID=35414568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05014136A Not-in-force EP1739351B1 (de) 2005-06-30 2005-06-30 Gasbrenner mit Stromversorgungsschaltung eines Sicherheitsventils für den Zündvorgang des Gasbrenners

Country Status (4)

Country Link
EP (1) EP1739351B1 (de)
AT (1) ATE404824T1 (de)
DE (1) DE602005008934D1 (de)
ES (1) ES2311185T3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102538030A (zh) * 2012-02-24 2012-07-04 宁波方太厨具有限公司 一种燃气灶具的点火和制动装置
US9562686B2 (en) 2013-08-02 2017-02-07 Coprecitec, S.L. Gas valve assembly

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1629918A1 (de) * 1967-02-21 1971-03-11 Neff Werke Zuend- und Sicherheitseinrichtung an Gasgeraeten
DE2013663A1 (de) * 1969-10-30 1971-05-13 Industrie A Zanussi SpA, Porde none (Italien) Elektrische Zündvorrichtung der Brenner eines Gaskochgerates
DE2123458A1 (de) * 1971-05-12 1972-11-23 Industrie A. Zanussi S.P.A., Pordenone (Italien) Selbsttätiges Sicherheitszünd- und Kontrollgerät der Flamme von Gasbrennern
JPS5493536A (en) * 1977-09-21 1979-07-24 Lamondine Sa Wheel supporting device
US4505253A (en) * 1983-02-04 1985-03-19 Rinnai Kabushiki Kaisha Water heater
EP0288390A1 (de) * 1987-04-24 1988-10-26 Chaffoteaux & Maury Sicherheitsvorrichtung für Gasventile
EP0439417A1 (de) * 1990-01-26 1991-07-31 Société Anonyme CONSTRUCTIONS ELECTRIQUES R. V. Sicherheitsvorrichtung für einen Brennerbetrieb
EP0478359A2 (de) * 1990-09-28 1992-04-01 Black Automatic Controls Ltd Regeleinrichtung
FR2721097A1 (fr) * 1994-06-10 1995-12-15 Cepem Dispositif de sécurité pour un appareil de combustion à gaz.
US20040033456A1 (en) * 2002-08-13 2004-02-19 Shah Reza H. Device for increasing power of extremely low DC voltage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3724084A1 (de) * 1986-07-23 1988-01-28 Vaillant Joh Gmbh & Co Steuerungseinrichtung zur inbetriebnahme des gasbrenners eines gasbeheizten wasserheizers

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1629918A1 (de) * 1967-02-21 1971-03-11 Neff Werke Zuend- und Sicherheitseinrichtung an Gasgeraeten
DE2013663A1 (de) * 1969-10-30 1971-05-13 Industrie A Zanussi SpA, Porde none (Italien) Elektrische Zündvorrichtung der Brenner eines Gaskochgerates
DE2123458A1 (de) * 1971-05-12 1972-11-23 Industrie A. Zanussi S.P.A., Pordenone (Italien) Selbsttätiges Sicherheitszünd- und Kontrollgerät der Flamme von Gasbrennern
JPS5493536A (en) * 1977-09-21 1979-07-24 Lamondine Sa Wheel supporting device
US4505253A (en) * 1983-02-04 1985-03-19 Rinnai Kabushiki Kaisha Water heater
EP0288390A1 (de) * 1987-04-24 1988-10-26 Chaffoteaux & Maury Sicherheitsvorrichtung für Gasventile
EP0439417A1 (de) * 1990-01-26 1991-07-31 Société Anonyme CONSTRUCTIONS ELECTRIQUES R. V. Sicherheitsvorrichtung für einen Brennerbetrieb
EP0478359A2 (de) * 1990-09-28 1992-04-01 Black Automatic Controls Ltd Regeleinrichtung
FR2721097A1 (fr) * 1994-06-10 1995-12-15 Cepem Dispositif de sécurité pour un appareil de combustion à gaz.
US20040033456A1 (en) * 2002-08-13 2004-02-19 Shah Reza H. Device for increasing power of extremely low DC voltage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102538030A (zh) * 2012-02-24 2012-07-04 宁波方太厨具有限公司 一种燃气灶具的点火和制动装置
US9562686B2 (en) 2013-08-02 2017-02-07 Coprecitec, S.L. Gas valve assembly

Also Published As

Publication number Publication date
ES2311185T3 (es) 2009-02-01
DE602005008934D1 (de) 2008-09-25
ATE404824T1 (de) 2008-08-15
EP1739351B1 (de) 2008-08-13

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