EP0869318A1 - Safety device for a stove with direct measuring of the rate of a gas production - Google Patents

Safety device for a stove with direct measuring of the rate of a gas production 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
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Prior art keywords
safety device
microsensor
sensor
micro
gas
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German (de)
French (fr)
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EP0869318B1 (en
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Guy Brucker
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Dtn France SA
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Dtn France SA
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    • 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).

Abstract

For stoves burning e.g. liquid fuel on wicks, combustion is controlled by battery-powered (6) microprocessor unit (B), with associated thermostat (9) and manual switch (11), altering wick height through an actuator (10). A monitor (7) shuts the stove down on battery failure. Arrangements for other fuels are generally similar. In the gas level detector (C), a thermal sensor (4) responds to a thin-film resistance heater (3), indicating the thermal conductivity of the ambient gas. Levels measured by Wheatstone bridge (5) pass, amplified (2) to the controller (B), which shuts the stove down if a set carbon dioxide level is exceeded. A discriminator (D) especially prevents shut-downs due to other gases.

Description

La présente invention concerne un dispositif de sécurité ou de régulation pour appareil de chauffage à combustible liquide, solide, gazeux, notamment mais non limitativement pour appareil de chauffage mobile à pétrole.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.

Dans les appareils mobiles à pétrole, le dégagement de chaleur est obtenu par catalyse du combustible amené dans la zone de catalyse par capillarité au moyen d'une mèche.In mobile petroleum devices, heat is obtained by catalysis of the fuel brought into the catalysis zone by capillarity by means of a wick.

Un actionneur ou mécanisme de manoeuvre permet de commander la sortie ou l'effacement de la mèche dans un porte-mèche et par là l'extinction du poêle.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.

Ce type d'appareil doit être équipé d'un système de sécurité imposant son arrêt total par extinction avant que la teneur en CO2 du local atteigne des seuils prédéterminés et interdisant la possibilité de réallumage tant que la cause ayant motivé cet arrêt n'a pas disparue.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.

Actuellement, la norme impose l'arrêt total pour un taux de CO2 compris entre 0,6 et 1 %. Ce taux de CO2 est, à l'heure actuelle, très difficile à mesurer dans cet intervalle de valeurs.Currently, the standard requires total shutdown for a CO 2 level of between 0.6 and 1%. This CO 2 level is currently very difficult to measure in this range of values.

On ne connaít qu'un détecteur à infra-rouge capable de remplir cette fonction de manière fiable mais son prix est très élevé et son utilisation sur un poêle à pétrole conduirait à doubler le prix de revient de l'appareil. Une application grand public de ce type de détecteur n'est donc pas envisageable.We only know of an infrared detector capable of fulfilling this function reliably but its price is very high and its use on an oil stove would double the cost price of the device. A consumer application from this type of detector is therefore not possible.

Techniquement, cette solution nécessite en outre un dispositif de pompage et une vitesse d'air suffisante.Technically, this solution also requires a pumping device and sufficient air speed.

Pour résoudre ce problème, la solution actuelle est d'évaluer indirectement le taux de CO2 en mesurant la température au voisinage de l'appareil seulement en pièce laboratoire étanche et sous certaines conditions d'environnement. Dans ces conditions limites cette température est en corrélation avec le taux de CO2. De tels appareils sont par exemple décrits dans les documents US-A-4,493,634, EP-A-0 075 602 et FR 95 03236 de la demanderesse.To solve this problem, 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.

Cette solution fait appel à de multiples composants (sonde, thermostat, thermocouples ou autres), et sa fiabilité et sa précision dépendent notamment du type de la pièce d'habitation, de la température prélevée, du nombre de composants, etc...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 ...

La demanderesse propose une solution nouvelle à ce problème qui permet de mesurer directement un taux de CO2, par exemple inférieur à 1 %, sans augmenter notablement le prix de l'appareil.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.

La demanderesse a eu l'idée d'utiliser un micro-capteur de gaz choisi dans l'ensemble (micro-capteur à conductivité thermique, micro-capteur catalytique, micro-capteur à oxyde semi-conducteur, micro-capteur électrochimique).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).

Des détecteurs fonctionnant sur ce principe ne sont utilisés actuellement qu'en très faible nombre dans les laboratoires de recherche ou de mesure, et pour des taux de productions gazeuses beaucoup plus élevés que ceux qui concernent les poêles à pétrole. Ils n'ont pas d'application industrielle connue.Detectors operating on this principle are not currently used in very small numbers in research or measurement laboratories, and for gas production rates much higher than those for petroleum stoves. They have no known industrial application.

La demanderesse a dû résoudre plusieurs problèmes pour adapter ce détecteur à cette application industrielle nouvelle et notamment:

  • concevoir un circuit de mesure spécifique,
  • définir une procédure de discrimination entre le CO2 et un autre élément gazeux qui présenterait une caractéristique très proche de celle du CO2.
The Applicant had to solve several problems to adapt this detector to this new industrial application and in particular:
  • design a specific measurement circuit,
  • define a discrimination procedure between CO 2 and another gaseous element which would have a characteristic very close to that of CO 2 .

Ces buts sont atteints par l'invention qui consiste en un dispositif de sécurité pour appareil de chauffage à combustible solide, liquide ou gazeux, caractérisé en ce qu'il comporte un ensemble de détection composé principalement d'un micro-capteur choisi dans l'ensemble (micro-capteur à conductivité thermique, micro-capteur catalytique, micro-capteur à oxyde semi-conducteur) qui détecte la production d'un gaz dangereux ou non désiré dans l'environnement de l'appareil et informe un ensemble électronique de commande, celui-ci provoquant l'arrêt de l'appareil dès qu'un taux prédéterminé dudit gaz est atteint.These objects are achieved by the invention which 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.

Selon un premier mode de réalisation à capteur à conductivité thermique, ce capteur comporte un élément chauffant activé par une électronique et un capteur de température, tous deux montés dans un pont de Wheatstone associé à un amplificateur.According to a first embodiment with a thermal conductivity sensor, this sensor includes an electronically activated heating element and a temperature, both mounted in a Wheatstone bridge associated with a amplifier.

Selon un deuxième mode de réalisation à capteur à oxyde semi-conducteur, le micro-capteur est un micro-capteur de type semi-conducteur composé d'un filament de chauffage et d'une couche sensible, associé à un amplificateur.According to a second embodiment with a semiconductor oxide sensor, the micro-sensor is a semi-conductor type micro-sensor composed of a heating filament and a sensitive layer, associated with an amplifier.

Selon un troisième mode de réalisation à capteur catalytique, le micro-capteur est un micro-capteur de type catalytique composé d'un filament de platine régulé par une électronique de chauffage et de gestion associé à un amplificateur.According to a third embodiment with a catalytic sensor, 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.

Selon un quatrième mode de réalisation à capteur électrochimique, le micro-capteur et un micro-capteur électrochimique monté sur son circuit de gestion et associé à un amplificateur.According to a fourth embodiment with an electrochemical sensor, the micro-sensor and an electrochemical micro-sensor mounted on its management circuit and associated with an amplifier.

Le dispositif selon l'invention peut comporter en outre, quelque soit le type de capteur utilisé, un ensemble de discrimination permettant de distinguer une production de gaz non désiré, par exemple le CO2, d'une autre production gazeuse ayant une caractéristique proche de celle du gaz non désiré.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.

Cette application industrielle n'est pas limitée aux poêles à pétrole, elle peut être généralisée à tous les appareils de chauffage à combustion de combustible solide, liquide, gazeux.This industrial application is not limited to petroleum stoves, it can be generalized to all fuel-burning heaters solid, liquid, gaseous.

On comprendra mieux l'invention à l'aide de la description qui suit faite en référence aux figures annexées suivantes :

  • la figure 1 est un schéma fonctionnel du dispositif selon un premier mode de réalisation de l'invention,
  • la figure 2 est un schéma fonctionnel du dispositif selon un deuxième mode de réalisation de l'invention,
  • la figure 3 est un schéma fonctionnel du dispositif selon un troisième mode de réalisation de l'invention,
  • la figure 4 est un schéma fonctionnel du dispositif selon un quatrième mode de réalisation de l'invention,
The invention will be better understood using the following description made with reference to the following appended figures:
  • FIG. 1 is a functional diagram of the device according to a first embodiment of the invention,
  • FIG. 2 is a functional diagram of the device according to a second embodiment of the invention,
  • FIG. 3 is a functional diagram of the device according to a third embodiment of the invention,
  • FIG. 4 is a functional diagram of the device according to a fourth embodiment of the invention,

Selon le premier mode de réalisation représenté à titre d'exemple non limitatif sur la figure 1 comporte principalement un actionneur (10) commandé par un ensemble de commande électronique (B) (avec son micro-processeur), un ensemble de détection (C1) (avec son micro-capteur de gaz A1), un ensemble de discrimination (D), une source d'énergie et un arrêt manuel (11). Dans l'application spécifique du poêle à pétrole, l'actionneur (10) est un actionneur de mèche.According to the first embodiment shown by way of nonlimiting example in FIG. 1, mainly comprises an actuator (10) controlled by an electronic control assembly (B) (with its microprocessor), a detection assembly (C 1 ) (with its gas micro-sensor A 1 ), a discrimination unit (D), an energy source and a manual stop (11). In the specific application of the oil stove, the actuator (10) is a wick actuator.

Un micro-capteur de gaz (A1), mesurant la conductivité thermique des gaz, est généralement constitué d'un élément résistif chauffant (3) déposé par des techniques connues de micro-électroniques sur une fine membrane isolée électriquement et thermiquement, et d'un capteur de température (4) déposé sur un support en silicone.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.

La mesure résulte de la dissipation thermique de la membrane, elle-même résultant de la conductivité thermique du gaz environnant ladite membrane.The measurement results from the heat dissipation of the membrane, itself resulting from the thermal conductivity of the gas surrounding said membrane.

Pour l'application au poêle à pétrole et aux autres types de poêles, le microcapteur (A1) est associé à un circuit spécifique pour former l'ensemble de détection (C1) fonctionnant comme suit :For application to the oil stove and other types of stoves, the microsensor (A 1 ) is associated with a specific circuit to form the detection assembly (C 1 ) operating as follows:

L'élément chauffant (3) est activé par une électronique (1), le capteur de température (4) lit la valeur de conductivité thermique du gaz à l'aide d'un pont de Wheatstone (5) associé à un amplificateur (2).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).

Lorsque la teneur en gaz détectée par (A1) atteint un seuil prédéterminé considéré dangereux, l'ensemble électronique (B) commande l'actionneur (10) et de ce fait provoque l'arrêt du poêle.When the gas content detected by (A 1 ) reaches a predetermined threshold considered dangerous, the electronic assembly (B) controls the actuator (10) and therefore causes the stove to stop.

Ainsi le poêle s'arrête chaque fois que le seuil est atteint, que le gaz soit du CO2, ou un mélange de gaz ou un élément gazeux comme l'ammoniac dont les conductivités seraient très proches de celles du CO2.Thus 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 .

Si on souhaite éliminer les arrêts qui ne seraient pas dus à des dégagements dangereux de CO2, on ajoutera au dispositif un ensemble de discrimination (D) géré par le microprocesseur (8) de l'ensemble de commande (B), et pouvant fonctionner selon divers critères de reconnaissance d'autres gaz, tels que :

  • ammoniac,
  • azote,
  • solvants,
  • alcool,
  • etc...
If you want to eliminate stops that are not due to dangerous CO 2 emissions, you will add to the device a discrimination set (D) managed by the microprocessor (8) of the control set (B), and which can operate according to various criteria for the recognition of other gases, such as:
  • ammonia,
  • nitrogen,
  • solvents,
  • alcohol,
  • etc ...

L'ensemble de discriminqtion peut par exemple fonctionner sur la lecture de la courbe signature d'un gaz.The discrimination set can for example function on the reading of the signature curve of a gas.

L'ensemble de commande (B) comporte encore d'autres éléments, par exemple une détection de température (9) pouvant servir à thermostater l'appareil.The control assembly (B) includes other elements, for example example a temperature detection (9) which can be used to thermostate the device.

De plus, une action sur un bouton-poussoir (11 ) doit être obligatoire pour mettre en marche le poêle, et un module électronique (7) surveille l'état de la source d'alimentation (6) interdisant la mise en marche du poêle si la source est défaillante.In addition, 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.

Le deuxième mode de réalisation représenté sur la figure 2 comporte un ensemble de détection (C2) à micro-capteur (A2) de type semi-conduceur composé d'un filament de chauffage (12) et d'une couche sensible (13) associé à un amplificateur (14) et à une électronique de gestion (15) permettant de détecter la présence du gaz pour le signaler à l'ensemble électronique de commande (B) et donc de déclencher l'arrêt du poêle à pétrole.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.

Le troisième mode de réalisation représenté sur la figure 3 comporte un ensemble de détection (C3) à micro-capteur (A3) de type catalytique composé d'un filament (23) ou autre, régulé par une électronique de chauffage et de gestion (25). En présence d'un gaz réactif, la résistance du filament (23) change et peut être mesurée à l'aide de l'amplificateur (24) et ainsi permettre de détecter la présence du gaz et le signaler à l'ensemble électronique de commande (B) et également déclencher l'arrêt du poêle à pétrole.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). In the presence of a reactive gas, 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.

Le quatrième mode de réalisation représenté sur la figure 4 comporte un ensemble de détection (C4) à micro-capteur (A4) de type électrochimique monté sur son circuit de gestion (35) et dont le signal de sortie est amplifié par l'amplificateur (34).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).

Dans tous les modes de réalisation, les fonctions des blocs ou composants (B,D,6,7,8,9,10,11) restent identiques. On peut également y adjoindre un moyen d'auto-calibration comme celui décrit dans le brevet FR 2 671 406. In all embodiments, the functions of the blocks or components (B, D, 6,7,8,9,10,11) remain identical. We can also add a means self-calibration such as that described in patent FR 2 671 406.

Les avantages de l'invention sont les suivants :

  • mesure directe du taux de CO2 dans la pièce (excellente corrélation avec la combustion),
  • conformité parfaite au décret n° 92-1280 du 10/12/92 et à la norme NF D 35-300,
  • utilisation de l'appareil impossible en cas de défaillance de l'énergie auxiliaire même avec un allumage extérieur (allumettes...).
The advantages of the invention are as follows:
  • direct measurement of the CO 2 level in the room (excellent correlation with combustion),
  • perfect compliance with decree n ° 92-1280 of 10/12/92 and standard NF D 35-300,
  • the appliance cannot be used in the event of an auxiliary energy failure even with an external ignition (matches, etc.).

Claims (11)

Dispositif de sécurité pour appareil de chauffage à combustible solide, liquide ou gazeux, caractérisé en ce qu'il comporte un ensemble de détection (C) composé principalement d'un micro-capteur choisi dans l'ensemble (micro-capteur à conductivité thermique, micro-capteur catalytique, micro-capteur à oxyde semi-conducteur) qui détecte la production d'un gaz dangereux ou non désiré dans l'environnement de l'appareil et informe un ensemble électronique de commande (B), celui-ci provoquant l'arrêt de l'appareil dès qu'un taux prédéterminé dudit gaz est atteint.Safety device for heating apparatus with solid, liquid or gaseous fuel, characterized in that it comprises a detection assembly (C) mainly composed of a micro-sensor chosen from the group (micro-sensor with thermal conductivity, catalytic micro-sensor, semiconductor oxide micro-sensor) which detects the production of a dangerous or unwanted gas in the environment of the device and informs an electronic control unit (B), this causing the shutdown of the device as soon as a predetermined rate of said gas is reached. Dispositif de sécurité selon la revendication 1, caractérisé en ce qu'il comporte en outre un ensemble de discrimination (D) permettant de distinguer une production de gaz non désiré d'une production gazeuse ayant une caractéristique proche de celle du gaz non désiré.Safety device according to claim 1, characterized in that it further comprises a discrimination assembly (D) making it possible to distinguish an unwanted gas production from a gas production having a characteristic close to that of the unwanted gas. Dispositif de sécurité selon la revendication 2, caractérisé en ce que le gaz non désiré est du CO2.Safety device according to claim 2, characterized in that the unwanted gas is CO 2 . Dispositif de sécurité selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comporte en outre un bouton-poussoir (11) dont l'action est obligatoire pour mettre en marche le poêle.Safety device according to any one of claims 1 to 3, characterized in that it further comprises a push button (11) whose action is mandatory to start the stove. Dispositif de sécurité selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il comporte en outre un détecteur de température (9) servant à thermostater l'appareil.Safety device according to any one of claims 1 to 4, characterized in that it further comprises a temperature detector (9) serving to thermostate the device. Dispositif de sécurité selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le micro-capteur est un micro-capteur (A1) à conductivité thermique comportant un élément chauffant (3) activé par une électronique (1) et un capteur de température (4) monté dans un pont de Wheatstone (5) associé à un amplificateur (2).Safety device according to any one of Claims 1 to 5, characterized in that the microsensor is a microsensor (A 1 ) with thermal conductivity comprising a heating element (3) activated by electronics (1) and a temperature sensor (4) mounted in a Wheatstone bridge (5) associated with an amplifier (2). Dispositif de sécurité selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le micro-capteur est un micro-capteur (A2) de type semi-conducteur composé d'un filament de chauffage (12) et d'une couche sensible (13), associé à un amplificateur (14).Safety device according to any one of Claims 1 to 5, characterized in that the microsensor is a microsensor (A 2 ) of the semiconductor type composed of a heating filament (12) and a sensitive layer (13), associated with an amplifier (14). Dispositif de sécurité selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le micro-capteur est un micro-capteur (A3) de type catalytique composé d'un filament de platine (23) régulé par une électronique de chauffage et de gestion (25) associé à un amplificateur (24).Safety device according to any one of claims 1 to 5, characterized in that the microsensor is a microsensor (A 3 ) of the catalytic type composed of a platinum filament (23) regulated by a heating electronics and management (25) associated with an amplifier (24). Dispositif de sécurité selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le micro-capteur est un micro-capteur (A4) électrochimique monté sur son circuit de gestion (35) et associé à un amplificateur (34).Safety device according to any one of claims 1 to 5, characterized in that the microsensor is an electrochemical microsensor (A 4 ) mounted on its management circuit (35) and associated with an amplifier (34). Dispositif de sécurité selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'il comporte un module de surveillance (7) de l'état de la source d'alimentation (6).Safety device according to any one of claims 1 to 9, characterized in that it comprises a monitoring module (7) of the state of the power source (6). Dispositif de sécurité selon l'une quelconque des revendications 1 à 10, caractérisé en ce qu'il comporte un moyen d'autocalibration.Safety device according to any one of claims 1 to 10, characterized in that it comprises a self-calibrating means.
EP98470009A 1997-04-04 1998-04-03 Safety device for a stove with direct measuring of the rate of a gas production Expired - Lifetime EP0869318B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9704433 1997-04-04
FR9704433A FR2761756B1 (en) 1997-04-04 1997-04-04 SAFETY DEVICE FOR A STOVE COMPRISING A SENSOR MEASURING THE THERMAL CONDUCTIVITY OF GASES

Publications (2)

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EP0869318A1 true EP0869318A1 (en) 1998-10-07
EP0869318B1 EP0869318B1 (en) 2002-09-18

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EP98470009A Expired - Lifetime EP0869318B1 (en) 1997-04-04 1998-04-03 Safety device for a stove with direct measuring of the rate of a gas production

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EP (1) EP0869318B1 (en)
DE (1) DE69807967D1 (en)
ES (1) ES2184215T3 (en)
FR (1) FR2761756B1 (en)

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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 (en) 2009-02-27 2009-04-30 Kermi Gmbh Holding and adjusting device for radiators
US8286603B2 (en) 2007-01-31 2012-10-16 Fumes Safety Llc System and method for controlling toxic gas

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* 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 (en) 2009-02-27 2009-04-30 Kermi Gmbh Holding and adjusting device for radiators
EP2224177A2 (en) 2009-02-27 2010-09-01 KERMI GmbH Neck and adjustment device for heaters

Also Published As

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

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