EP0869318A1 - Sicherheitsvorrichtung für einen Ofen mit direkter Messung der Produktionsrate von Gas - Google Patents

Sicherheitsvorrichtung für einen Ofen mit direkter Messung der Produktionsrate von Gas Download PDF

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Publication number
EP0869318A1
EP0869318A1 EP98470009A EP98470009A EP0869318A1 EP 0869318 A1 EP0869318 A1 EP 0869318A1 EP 98470009 A EP98470009 A EP 98470009A EP 98470009 A EP98470009 A EP 98470009A EP 0869318 A1 EP0869318 A1 EP 0869318A1
Authority
EP
European Patent Office
Prior art keywords
safety device
microsensor
sensor
micro
gas
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
EP98470009A
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English (en)
French (fr)
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EP0869318B1 (de
Inventor
Guy Brucker
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Dtn France SA
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Dtn France SA
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Publication date
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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
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties

Definitions

  • the present invention relates to a safety or regulation device for heating apparatus with liquid, solid, gaseous fuel, in particular but not limited to mobile petroleum heater.
  • heat is obtained by catalysis of the fuel brought into the catalysis zone by capillarity by means of a wick.
  • An actuator or operating mechanism makes it possible to control the output or clearing the wick in a wick holder and thereby shutting down the stove.
  • This type of device must be equipped with a safety system requiring its total shutdown by extinction before the CO 2 content of the room reaches predetermined thresholds and prohibiting the possibility of re-ignition as long as the cause that motivated this shutdown has not gone.
  • this solution also requires a pumping device and sufficient air speed.
  • the current solution is to indirectly assess the CO 2 level by measuring the temperature in the vicinity of the device only in a sealed laboratory room and under certain environmental conditions. Under these boundary conditions, this temperature is correlated with the CO 2 level .
  • Such devices are for example described in documents US-A-4,493,634, EP-A-0 075 602 and FR 95 03236 of the applicant.
  • This solution uses multiple components (probe, thermostat, thermocouples or others), and its reliability and accuracy depend in particular on the type of living room, temperature sampled, number of components, etc ...
  • the Applicant proposes a new solution to this problem which makes it possible to directly measure a CO 2 level , for example less than 1%, without significantly increasing the price of the device.
  • the Applicant had the idea of using a gas micro-sensor chosen from the assembly (thermal conductivity micro-sensor, catalytic micro-sensor, semiconductor oxide microsensor, electrochemical microsensor).
  • the invention consists of a safety device for heating apparatus with solid, liquid or gaseous fuel, characterized in what it includes a detection set composed mainly of a micro-sensor chosen from the set (thermal conductivity micro-sensor, micro-sensor semiconductor oxide micro-sensor) which detects the production of a dangerous or unwanted gas in the environment of the appliance and informs an electronic control unit, this causing the stopping of the apparatus as soon as a predetermined rate of said gas is reached.
  • a detection set composed mainly of a micro-sensor chosen from the set (thermal conductivity micro-sensor, micro-sensor semiconductor oxide micro-sensor) which detects the production of a dangerous or unwanted gas in the environment of the appliance and informs an electronic control unit, this causing the stopping of the apparatus as soon as a predetermined rate of said gas is reached.
  • this sensor includes an electronically activated heating element and a temperature, both mounted in a Wheatstone bridge associated with a amplifier.
  • the micro-sensor is a semi-conductor type micro-sensor composed of a heating filament and a sensitive layer, associated with an amplifier.
  • the micro-sensor is a catalytic type micro-sensor composed of a platinum filament regulated by a heating and management electronics associated with an amplifier.
  • the micro-sensor and an electrochemical micro-sensor mounted on its management circuit and associated with an amplifier.
  • the device according to the invention may also comprise, whatever the type of sensor used, a discrimination assembly making it possible to distinguish an unwanted gas production, for example CO 2 , from another gas production having a characteristic close to that of unwanted gas.
  • a discrimination assembly making it possible to distinguish an unwanted gas production, for example CO 2 , from another gas production having a characteristic close to that of unwanted gas.
  • This industrial application is not limited to petroleum stoves, it can be generalized to all fuel-burning heaters solid, liquid, gaseous.
  • the actuator (10) is a wick actuator.
  • a gas micro-sensor (A 1 ), measuring the thermal conductivity of gases, generally consists of a resistive heating element (3) deposited by known techniques of micro-electronics on a thin membrane electrically and thermally insulated, and d '' a temperature sensor (4) deposited on a silicone support.
  • the measurement results from the heat dissipation of the membrane, itself resulting from the thermal conductivity of the gas surrounding said membrane.
  • the microsensor (A 1 ) is associated with a specific circuit to form the detection assembly (C 1 ) operating as follows:
  • the heating element (3) is activated by electronics (1), the temperature (4) reads the thermal conductivity value of the gas using a bridge Wheatstone (5) associated with an amplifier (2).
  • the electronic assembly (B) controls the actuator (10) and therefore causes the stove to stop.
  • the stove stops each time the threshold is reached, whether the gas is CO 2 , or a mixture of gases or a gaseous element such as ammonia whose conductivities are very close to those of CO 2 .
  • the discrimination set can for example function on the reading of the signature curve of a gas.
  • the control assembly (B) includes other elements, for example example a temperature detection (9) which can be used to thermostate the device.
  • an action on a push button (11) must be mandatory to start the stove, and an electronic module (7) monitors the state of the source supply (6) preventing the stove from being started if the source fails.
  • the second embodiment shown in FIG. 2 comprises a detection assembly (C 2 ) with a micro-sensor (A 2 ) of the semi-conductor type composed of a heating filament (12) and a sensitive layer (13 ) associated with an amplifier (14) and with management electronics (15) making it possible to detect the presence of gas to signal it to the electronic control unit (B) and therefore to trigger the shutdown of the oil stove.
  • the third embodiment represented in FIG. 3 comprises a detection assembly (C 3 ) with micro-sensor (A 3 ) of catalytic type composed of a filament (23) or other, regulated by an electronic heating and management (25).
  • a 3 micro-sensor
  • the resistance of the filament (23) changes and can be measured using the amplifier (24) and thus make it possible to detect the presence of the gas and report it to the electronic control unit (B) and also trigger the shutdown of the oil stove.
  • the fourth embodiment represented in FIG. 4 comprises a detection assembly (C 4 ) with micro-sensor (A 4 ) of electrochemical type mounted on its management circuit (35) and the output signal of which is amplified by the amplifier (34).

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Feeding And Controlling Fuel (AREA)
EP98470009A 1997-04-04 1998-04-03 Sicherheitsvorrichtung für einen Ofen mit direkter Messung der Produktionsrate von Gas Expired - Lifetime EP0869318B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9704433 1997-04-04
FR9704433A FR2761756B1 (fr) 1997-04-04 1997-04-04 Dispositif de securite pour poele comportant un capteur mesurant la conductivite thermique des gaz

Publications (2)

Publication Number Publication Date
EP0869318A1 true EP0869318A1 (de) 1998-10-07
EP0869318B1 EP0869318B1 (de) 2002-09-18

Family

ID=9505762

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98470009A Expired - Lifetime EP0869318B1 (de) 1997-04-04 1998-04-03 Sicherheitsvorrichtung für einen Ofen mit direkter Messung der Produktionsrate von Gas

Country Status (4)

Country Link
EP (1) EP0869318B1 (de)
DE (1) DE69807967D1 (de)
ES (1) ES2184215T3 (de)
FR (1) FR2761756B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004074809A2 (en) * 2003-02-14 2004-09-02 Stanton Enterprises, Inc. Method and apparatus for reliable carbon monoxide detection
DE202009002820U1 (de) 2009-02-27 2009-04-30 Kermi Gmbh Halte- und Justiervorrichtung für Heizkörper
US8286603B2 (en) 2007-01-31 2012-10-16 Fumes Safety Llc System and method for controlling toxic gas

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075602A1 (de) 1981-04-06 1983-04-06 Matsushita Electric Industrial Co., Ltd. Verbrennungssicherheitsvorrichtung für flüssige brennstoffverbrennungsvorrichtung
US4493634A (en) 1982-04-28 1985-01-15 Yang Jerry S C Kerosene heating stove with temperature and carbonic oxide sensors
JPS62294809A (ja) * 1986-06-11 1987-12-22 Sanyo Electric Co Ltd 燃焼機器に使用される有毒ガス検知器
EP0358925A2 (de) * 1988-09-14 1990-03-21 Seiko Co.,Ltd. Sensor zum Nachweis von CO durch katalytische Verbrennung
EP0439950A1 (de) * 1989-12-28 1991-08-07 Honeywell Inc. Bestimmung der Wärmeleitfähigkeit und der spezifischen Wärme von Gasen bei Normalbedingungen
EP0440828A1 (de) * 1987-08-14 1991-08-14 Hesham Hassan Gazzaz Gasüberwachungssystem mit Lecknachweis und Strömungsunterbrechung
FR2671406A1 (fr) 1991-01-09 1992-07-10 Am Chamrceun Rith Detecteur d'etat d'alarme comme un detecteur de concentration dangereuse en gaz nocifs dans un milieu.
EP0511582A1 (de) * 1991-04-29 1992-11-04 EUROGIADA S.r.l. Vorrichtung zur Aufspürung von atmosphärischen Verunreinigungen
JPH06229539A (ja) * 1993-02-05 1994-08-16 Paloma Ind Ltd 燃焼装置
US5418131A (en) * 1994-04-13 1995-05-23 General Signal Corporation Humidity compensated carbon dioxide gas measurement and control
JPH08178281A (ja) * 1994-12-28 1996-07-12 Tokyo Gas Co Ltd 対ｃｏガス安全システム
FR2731776A1 (fr) 1995-03-16 1996-09-20 Dtn Fr Sa Dispositif de securite ou regulation passif pour appareil de chauffage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5165883A (en) * 1989-10-26 1992-11-24 Toyotomi Co. Ltd. Apparatus and method for safe operation of kerosene heaters

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075602A1 (de) 1981-04-06 1983-04-06 Matsushita Electric Industrial Co., Ltd. Verbrennungssicherheitsvorrichtung für flüssige brennstoffverbrennungsvorrichtung
US4493634A (en) 1982-04-28 1985-01-15 Yang Jerry S C Kerosene heating stove with temperature and carbonic oxide sensors
JPS62294809A (ja) * 1986-06-11 1987-12-22 Sanyo Electric Co Ltd 燃焼機器に使用される有毒ガス検知器
EP0440828A1 (de) * 1987-08-14 1991-08-14 Hesham Hassan Gazzaz Gasüberwachungssystem mit Lecknachweis und Strömungsunterbrechung
EP0358925A2 (de) * 1988-09-14 1990-03-21 Seiko Co.,Ltd. Sensor zum Nachweis von CO durch katalytische Verbrennung
EP0439950A1 (de) * 1989-12-28 1991-08-07 Honeywell Inc. Bestimmung der Wärmeleitfähigkeit und der spezifischen Wärme von Gasen bei Normalbedingungen
FR2671406A1 (fr) 1991-01-09 1992-07-10 Am Chamrceun Rith Detecteur d'etat d'alarme comme un detecteur de concentration dangereuse en gaz nocifs dans un milieu.
EP0511582A1 (de) * 1991-04-29 1992-11-04 EUROGIADA S.r.l. Vorrichtung zur Aufspürung von atmosphärischen Verunreinigungen
JPH06229539A (ja) * 1993-02-05 1994-08-16 Paloma Ind Ltd 燃焼装置
US5418131A (en) * 1994-04-13 1995-05-23 General Signal Corporation Humidity compensated carbon dioxide gas measurement and control
JPH08178281A (ja) * 1994-12-28 1996-07-12 Tokyo Gas Co Ltd 対ｃｏガス安全システム
FR2731776A1 (fr) 1995-03-16 1996-09-20 Dtn Fr Sa Dispositif de securite ou regulation passif pour appareil de chauffage

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 183 (M - 703) 28 May 1988 (1988-05-28) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 607 (M - 1707) 18 November 1994 (1994-11-18) *
PATENT ABSTRACTS OF JAPAN vol. 096, no. 011 29 November 1996 (1996-11-29) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004074809A2 (en) * 2003-02-14 2004-09-02 Stanton Enterprises, Inc. Method and apparatus for reliable carbon monoxide detection
WO2004074809A3 (en) * 2003-02-14 2005-04-14 Stanton Entpr Inc Method and apparatus for reliable carbon monoxide detection
US8286603B2 (en) 2007-01-31 2012-10-16 Fumes Safety Llc System and method for controlling toxic gas
DE202009002820U1 (de) 2009-02-27 2009-04-30 Kermi Gmbh Halte- und Justiervorrichtung für Heizkörper
EP2224177A2 (de) 2009-02-27 2010-09-01 KERMI GmbH Hals- und Justiervorrichtung für Heizkörper

Also Published As

Publication number Publication date
FR2761756B1 (fr) 1999-06-04
DE69807967D1 (de) 2002-10-24
FR2761756A1 (fr) 1998-10-09
EP0869318B1 (de) 2002-09-18
ES2184215T3 (es) 2003-04-01

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