WO1991015716A1 - Security system for a combustion heating installation - Google Patents

Security system for a combustion heating installation Download PDF

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Publication number
WO1991015716A1
WO1991015716A1 PCT/FR1991/000257 FR9100257W WO9115716A1 WO 1991015716 A1 WO1991015716 A1 WO 1991015716A1 FR 9100257 W FR9100257 W FR 9100257W WO 9115716 A1 WO9115716 A1 WO 9115716A1
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WO
WIPO (PCT)
Prior art keywords
probe
security system
value
heating installation
combustion gases
Prior art date
Application number
PCT/FR1991/000257
Other languages
French (fr)
Inventor
Michel Van Gorp
Original Assignee
Michel Van Gorp
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 Michel Van Gorp filed Critical Michel Van Gorp
Publication of WO1991015716A1 publication Critical patent/WO1991015716A1/en

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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
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • 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
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/04—Fail safe for electrical power failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/10—Fail safe for component failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/20—Warning devices
    • 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
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F23N5/006—Systems for controlling combustion using detectors sensitive to combustion gas properties the detector being sensitive to oxygen

Definitions

  • the present invention relates to the safety of combustion heating installations, that is to say installations in which caloric energy is obtained by the combustion of a fuel. It relates more particularly to a security system specially adapted to this type of installation.
  • Heating installations in particular combustion systems, involve the following risk: when a potentially critical situation is not detected in time, the potential danger may turn into real danger.
  • persistent production of carbon monoxide CO may involve a risk of poisoning.
  • a rise in the temperature of the heating installation can, if it continues, cause a fire.
  • the object of the present invention is precisely to prevent this kind of risk.
  • a safety system has been designed for a combustion heating installation; this comprises on the one hand one or more probes capable of exploring situations indicating a potential danger inside said heating installation and on the other hand an interruption device capable of stopping the combustion process in the event of potential danger detected by at least one probe.
  • the probes useful for the detection of a potential danger they can be probes exploring the operating conditions of the installation such as a temperature probe, a carbon monoxide CO probe which explores the content in CO of combustion gases, a carbon dioxide probe C0 ? which explores the C0 2 content of the combustion gases, an oxygen sensor capable of exploring the oxygen content of the combustion gases or of the air supplied to the installation.
  • H may also be probes capable of verifying whether the security system is itself in good working condition and therefore capable of perfectly ensuring the safety of the installation, for example a probe which explores the value of the voltage d security system supply, a probe which explores possible wire breaks, in particular in the CO, CO or O probes and in their connection to the interrupting device.
  • the security system which is the subject of the present invention is applicable, for example, to domestic heating installations, such as gas or oil central heating boilers, gas wall heaters or oil stoves. However, it can also be used on other types of heating installations, of the industrial type for example.
  • the system of the present invention comprises an electronic centralized control circuit 1, connected to an interrupt device 2.
  • This interruption device 2 can be composed, for example, of a valve incorporated in the fuel inlet duct, which can be actuated, as desired, by a solenoid or an electric motor. It will preferably be a valve capable of automatically placing itself in the closed position when the energy supply is closed.
  • the centralized control circuit 1 is connected to a indicating device 3.
  • This indicating device 3 allows the user to be informed of the anomaly and possibly to know the origin of the anomaly noted; it is an optical and / or auditory indicator, for example an audible signal.
  • the indications of the indicating device 3 are advantageously, in the case of heating installations in a factory, transmitted to the central control station of the factory for example by HF signal
  • the security system includes four 4,5,6,7 probes; the first 4 measures the temperature of the controlled heating installation; the second 5 determines the CO content of the combustion gases; the third 6 explores the supply voltage; and the fourth 7 checks if there is a wire break in the circuit at the CO probe 5.
  • the security system is equipped with an ignition device 8 which is actuated by an ignition control member 9. This ignition control member 9 can take the form of a manual control, but it can also be equipped with a thermostatic switch.
  • An AND circuit 10 has been placed between the ignition control member and the ignition device 8. The AND circuit 10 also receives the signals from the temperature probe 4 and from the centralized control circuit 1.
  • the temperature sensor 4 When the heating system is operating, the temperature sensor 4 continuously detects its internal temperature. If the temperature stays within certain predetermined limits, nothing happens. If, on the other hand, the temperature exceeds the predetermined minimum or maximum limits, the information is transmitted to the centralized control circuit 1 which detects the presence of an anomaly, reports it to the indicator 3 and interrupts combustion by triggering the interruption 2. Under normal combustion conditions, it is also possible control the CO content of the combustion gases using the probe 5. In the same way, when the average value exceeds the predetermined value, the centralized control circuit 1 detects the anomaly, transmits the information and interrupts combustion. When the supply voltage probe 6 detects a supply voltage that is too low or too high, which can also cause an accident, the centralized control circuit detects an anomaly and combustion is also stopped, since in such conditions the security system may not function properly.
  • the wire break probe 7 acts in exactly the same way. When it detects a wire break in the CO probe, it transmits the anomaly and interrupts combustion. In doing so, it prevents the critical situation from continuing and the real danger is therefore averted.
  • the interruption order is again sent intermittently to the interruption device, and this until the temperature has lowered below the limit value, so as to have the assurance that the flame has been extinguished.
  • the user can use the ignition control member 9 to try to activate the ignition device 8 which makes it possible to light the installation. This attempt will be followed by an effect only if the temperature sensor 4 of the heating installation detects a temperature below the predetermined value, and if the centralized control circuit 1 does not indicate any anomaly.
  • the centralized control circuit 1 sends a pulse to the interrupting device 3 every minute, as long as the temperature probe 4 does not indicate that the temperature is below about 50 ° C. If the heating system is restarted, the fact that the temperature is below about 50 ° C allows ignition in good conditions and not a violent ignition as may occur in the presence of fuel vapor.
  • the centralized control circuit 1 may include a time delay so that it does not take into account the signals emitted by the CO probe 5 and those of the signals emitted by the temperature probe 4 which correspond to the minimum temperature only after '' a predetermined time after ignition.
  • This time delay is adjustable; the predetermined time is chosen according to the type of CO 5 probe; for the current probes it is 10 to 15 minutes, which is the time after which the probe 5 is stabilized in reading.
  • the temperature probe 4 must be able to react immediately to a temperature higher than the predetermined maximum temperature.
  • the temperature probe 4 is constantly energized, independently of the security system proper, so that if the temperature probe 4 detects an abnormal temperature, it automatically activates the security system.
  • the invention is not limited to the embodiment which has been described by way of non-exhaustive example but covers all the variants.
  • carbon dioxide probe making it possible to measure the content of C0 ? combustion gases
  • oxygen sensor for measuring the oxygen content of the combustion gases or of the air supplying the installation. If it is vital to detect even a very weak presence of carbon monoxide, it is also very important to detect the evolution of COp and Op during combustion. Even in the absence of carbon monoxide, a decrease in oxygen below a certain threshold or an increase in carbon dioxide beyond a certain threshold can have very harmful or even fatal effects on the occupant of the room where the installation is located.
  • the combustion can be interrupted either by cutting the fuel supply as has been described in the example above, either by smothering the flame by appropriate means.
  • Such means can be mechanical, in this case the interrupting device 2 comprises means capable of retracting the wick in its housing; these means could possibly be chemical, of the extinguisher type.
  • the interruption device will be a solenoid valve capable of cutting off the gas supply.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Control Of Combustion (AREA)

Abstract

The security system comprises one or more probes (4, 5, 6, 7) and an interruption device (1, 2) capable of stopping the combustion process, for example by shutting off the fuel supply, if a potential hazard is detected by a probe. The probes relate to the operation of the heating installation; temperature (4), CO (5), CO2 or oxygen probe, or the operation of the security system itself: voltage supply probe (6), wire breakage probe (7).

Description

SYSTEME DE SECURITE POUR INSTALLATION DE CHAUFFAGE A COMBUSTION SAFETY SYSTEM FOR A COMBUSTION HEATER
DOMAINE TECHNIQUE La présente invention concerne la sécurité des installations de chauffage à combustion, c'est-à-dire les installations dans lesquelles l'énergie calorique est obtenue grâce à la combustion d'un combustible. Elle concerne plus particulièrement un système de sécurité spécialement adapté à ce type d'installations.TECHNICAL FIELD The present invention relates to the safety of combustion heating installations, that is to say installations in which caloric energy is obtained by the combustion of a fuel. It relates more particularly to a security system specially adapted to this type of installation.
TECHNIQUE ANTERIEURE Les installations de chauffage en particulier à combustion impliquent le risque suivant : lorsqu'une situation potentiellement critique, n'est pas détectée à temps, le danger potentiel peut se transformer en danger réel.PRIOR ART Heating installations, in particular combustion systems, involve the following risk: when a potentially critical situation is not detected in time, the potential danger may turn into real danger.
Par exemple , une production d'oxyde de carbone CO persistante peut impliquer un risque d'intoxication.For example, persistent production of carbon monoxide CO may involve a risk of poisoning.
De même , une hausse de température de l'installation de chauffage peut, si elle perdure , provoquer un incendie.Likewise, a rise in the temperature of the heating installation can, if it continues, cause a fire.
L'objet de la présente invention est précisément de prévenir ce genre de risques.The object of the present invention is precisely to prevent this kind of risk.
EXPOSE DE L'INVENTIONSTATEMENT OF THE INVENTION
Pour atteindre cet objectif, on a conçu un système de sécurité pour installation de chauffage à combustion; celui-ci comprend d'une part une ou plusieurs sondes aptes à explorer des situations indiquant un danger potentiel à l'intérieur de ladite installation de chauffage et d'autre part un dispositif d'interruption capable d'arrêter le processus de combustion en cas de danger potentiel détecté par au moins une sonde.To achieve this objective, a safety system has been designed for a combustion heating installation; this comprises on the one hand one or more probes capable of exploring situations indicating a potential danger inside said heating installation and on the other hand an interruption device capable of stopping the combustion process in the event of potential danger detected by at least one probe.
Grâce à ces mesures de sécurité , on peut détecter le danger potentiel à temps , et interrompre immédiatement le processus de combustion avant que l'incident ne se produise.These safety measures can detect the potential danger in time, and immediately stop the combustion process before the incident occurs.
Parmi les sondes utiles pour la détection d'un danger potentiel , il peut s'agir de sondes explorant les conditions de fonctionnement de l'installation telle qu'une sonde de température, une sonde d'oxyde de carbone CO qui explore la teneur en CO des gaz de combustion, une sonde de dioxyde de carbone C0? qui explore la teneur en C02 des gaz de combustion, une sonde d'oxygène apte à explorer la teneur en oxygène des gaz de combustion ou de l'air fourni dans l'installation. H peut également s'agir de sondes capables de vérifier si le système de sécurité est lui-même en bon état de fonctionnement et donc apte à assurer parfaitement la sécurité de l'installation, par exemple une sonde qui explore la valeur de la tension d'alimentation du système de sécurité , une sonde qui explore les ruptures éventuelles de fil en particulier dans les sondes de CO, de C0„ ou d'O et dans leur liaison au dispositif d'interruption.Among the probes useful for the detection of a potential danger, they can be probes exploring the operating conditions of the installation such as a temperature probe, a carbon monoxide CO probe which explores the content in CO of combustion gases, a carbon dioxide probe C0 ? which explores the C0 2 content of the combustion gases, an oxygen sensor capable of exploring the oxygen content of the combustion gases or of the air supplied to the installation. H may also be probes capable of verifying whether the security system is itself in good working condition and therefore capable of perfectly ensuring the safety of the installation, for example a probe which explores the value of the voltage d security system supply, a probe which explores possible wire breaks, in particular in the CO, CO or O probes and in their connection to the interrupting device.
Le système de sécurité qui fait l'objet de la présente invention est applicable , par exemple , aux installations de chauffage domestique , comme les chaudières de chauffage central à gaz ou à mazout , les radiateurs muraux à gaz ou les poêles à mazout. Néanmoins , il peut également être employé sur d'autres genres d'installations de chauffage , de type industriel par exemple.The security system which is the subject of the present invention is applicable, for example, to domestic heating installations, such as gas or oil central heating boilers, gas wall heaters or oil stoves. However, it can also be used on other types of heating installations, of the industrial type for example.
BREVE DESCRIPTION DU DESSIN D'autres caractéristiques et avantages apparaîtront plus clairement à la lecture de la description qui va être faite du mode de réalisation préféré du système de sécurité pour installation de chauffage à combustion illustré par le dessin annexé dans lequel la figure unique est une représentation sous forme d'un diagramme dudit système.BRIEF DESCRIPTION OF THE DRAWING Other characteristics and advantages will appear more clearly on reading the description which will be given of the preferred embodiment of the safety system for combustion heating installation illustrated by the appended drawing in which the single figure is a representation in the form of a diagram of said system.
MEILLEURE MANIERE DE REALISER L'INVENTIONBEST WAY TO IMPLEMENT THE INVENTION
Le système de la présente invention comprend un circuit électronique de contrôle centralisé 1, connecté à un dispositif d'interruption 2 . Ce dispositif d'interruption 2 peut être composé, par exemple , d'une valve incorporée au conduit d'arrivée du combustible , laquelle peut être actionnée, au choix, par un solénoide ou un moteur électrique. Il s'agira de préférence d'une valve capable de se placer automatiquement en position fermée lorsqu'on ferme l'approvisionnement énergétique. Le circuit de contrôle centralisé 1 est connecté à un dispositif indicateur 3. Ce dispositif indicateur 3 permet à l'utilisateur d'être informé de l'anomalie et éventuellement de connaître l'origine de l'anomalie constatée ; il s'agit d'un indicateur optique et/ou auditif , par exemple un signal sonore. Les indications du dispositif indicateur 3 sont avantageusement, dans le cas d'installations de chauffage dans une usine, transmises au poste central de contrôle de l'usine par exemple par signal H.F.The system of the present invention comprises an electronic centralized control circuit 1, connected to an interrupt device 2. This interruption device 2 can be composed, for example, of a valve incorporated in the fuel inlet duct, which can be actuated, as desired, by a solenoid or an electric motor. It will preferably be a valve capable of automatically placing itself in the closed position when the energy supply is closed. The centralized control circuit 1 is connected to a indicating device 3. This indicating device 3 allows the user to be informed of the anomaly and possibly to know the origin of the anomaly noted; it is an optical and / or auditory indicator, for example an audible signal. The indications of the indicating device 3 are advantageously, in the case of heating installations in a factory, transmitted to the central control station of the factory for example by HF signal
Le système de sécurité comprend quatre sondes 4,5,6,7; la première 4 mesure la température de l'installation de chauffage contrôlée; la seconde 5 détermine la teneur en CO des gaz de combustion; la troisième 6 explore la tension d'alimentation; et la quatrième 7 vérifie s'il y a une rupture de fil dans le circuit au niveau de la sonde 5 de CO. Le système de sécurité est équipé d'un dispositif d'allumage 8 qui est actionné par un organe de commande de l'allumage 9. Cet organe de commande de l'allumage 9 peut prendre la forme d'un commande manuelle, mais il peut également être équipé d'un interrupteur thermostatique. Un circuit AND 10 a été placé entre l'organe de commande de l'allumage et le dispositif d'allumage 8. Le circuit AND 10 reçoit également les signaux en provenance de la sonde de température 4 et du circuit de contrôle centralisé 1.The security system includes four 4,5,6,7 probes; the first 4 measures the temperature of the controlled heating installation; the second 5 determines the CO content of the combustion gases; the third 6 explores the supply voltage; and the fourth 7 checks if there is a wire break in the circuit at the CO probe 5. The security system is equipped with an ignition device 8 which is actuated by an ignition control member 9. This ignition control member 9 can take the form of a manual control, but it can also be equipped with a thermostatic switch. An AND circuit 10 has been placed between the ignition control member and the ignition device 8. The AND circuit 10 also receives the signals from the temperature probe 4 and from the centralized control circuit 1.
Le fonctionnement du système de sécurité selon la présente invention est expliqué ci-dessous.The operation of the security system according to the present invention is explained below.
Lorsque l'installation de chauffage fonctionne, la sonde de température 4 détecte en continu la température interne de celle-ci . Si la température se maintient dans certaines limites prédéterminées, rien ne se passe . Si par contre la température dépasse les limites minimum ou maximum prédéterminées, l'information est transmise au circuit de contrôle centralisé 1 qui détecte la présence d'une anomalie , la signale à l'indicateur 3 et interrompt la combustion en déclenchant le dispositif d'interruption 2. En conditions normales de combustion , on peut également contrôler la teneur en CO des gaz de combustion grâce à la sonde 5. De la même façon , lorsque la valeur moyenne dépasse la valeur prédéterminée , le circuit de contrôle centralisé 1 détecte l'anomalie , transmet 1 'information et interrompt la combustion. Lorsque la sonde de la tension d'alimentation 6 détecte une tension d'alimentation trop faible ou trop élevée, ce qui peut également provoquer un accident, le circuit de contrôle centralisé détecte une anomalie et la combustion est également arrêtée, étant donné que dans de telles conditions le système de sécurité ne peut pas fonctionner correctement.When the heating system is operating, the temperature sensor 4 continuously detects its internal temperature. If the temperature stays within certain predetermined limits, nothing happens. If, on the other hand, the temperature exceeds the predetermined minimum or maximum limits, the information is transmitted to the centralized control circuit 1 which detects the presence of an anomaly, reports it to the indicator 3 and interrupts combustion by triggering the interruption 2. Under normal combustion conditions, it is also possible control the CO content of the combustion gases using the probe 5. In the same way, when the average value exceeds the predetermined value, the centralized control circuit 1 detects the anomaly, transmits the information and interrupts combustion. When the supply voltage probe 6 detects a supply voltage that is too low or too high, which can also cause an accident, the centralized control circuit detects an anomaly and combustion is also stopped, since in such conditions the security system may not function properly.
La sonde de rupture de fil 7 agit exactement de la même façon. Lorsqu'elle détecte une rupture de fil dans la sonde de CO, elle transmet l'anomalie et interrompt la combustion . Ce faisant, elle empêche la situation critique de se prolonger et le danger réel est donc écarté.The wire break probe 7 acts in exactly the same way. When it detects a wire break in the CO probe, it transmits the anomaly and interrupts combustion. In doing so, it prevents the critical situation from continuing and the real danger is therefore averted.
Selon un mode particulier de l'invention, à la suite d'une interruption due au système de sécurité, l'ordre d'interruption est de nouveau envoyé par intermittence au dispositif d'interruption, et ceci jusqu'à ce que la température ait baissé en dessous de la valeur limite , de façon à avoir l'assurance que la flamme a bien été éteinte.According to a particular embodiment of the invention, following an interruption due to the security system, the interruption order is again sent intermittently to the interruption device, and this until the temperature has lowered below the limit value, so as to have the assurance that the flame has been extinguished.
Lorsqu'il met en marche son installation de chauffage, l'usager peut utiliser l'organe de commande d'allumage 9 pour tenter d'activer le dispositif d'allumage 8 qui permet d'allumer l'installation . Cette tentative ne sera suivie d'effet que -si la sonde de température 4 de l'installation de chauffage détecte une température inférieure à la valeur prédéterminée , et si le circuit de contrôle centralisé 1 n'indique aucune anomalie.When switching on his heating installation, the user can use the ignition control member 9 to try to activate the ignition device 8 which makes it possible to light the installation. This attempt will be followed by an effect only if the temperature sensor 4 of the heating installation detects a temperature below the predetermined value, and if the centralized control circuit 1 does not indicate any anomaly.
Par exemple le circuit de contrôle centralisé 1 envoie une impulsion au dispositif d'interruption 3 toutes les minutes, tant que la sonde de température 4 n'indique pas que la température est inférieure à environ 50°C. En cas de redémarrage de l'installation de chauffage, le fait que la température soit inférieure à environ 50°C permet un allumage dans de bonnes conditions et non un allumage violent comme cela peut se produire en présence de vapeur de combustible.For example, the centralized control circuit 1 sends a pulse to the interrupting device 3 every minute, as long as the temperature probe 4 does not indicate that the temperature is below about 50 ° C. If the heating system is restarted, the fact that the temperature is below about 50 ° C allows ignition in good conditions and not a violent ignition as may occur in the presence of fuel vapor.
Le circuit de contrôle centralisé 1 peut comporter une temporisation en sorte qu'il ne prenne en compte les signaux émis par la sonde 5 de CO et ceux des signaux émis par la sonde de température 4 qui correspondent à la température minimum qu'au bout d'un temps prédéterminé après l'allumage. Cette temporisation est réglable; le temps prédéterminé est choisi en fonction du type de sonde de CO 5; pour les sondes actuelles il s'agit de 10 à 15 minutes, qui est le temps au bout duquel la sonde 5 est stabilisée en lecture.The centralized control circuit 1 may include a time delay so that it does not take into account the signals emitted by the CO probe 5 and those of the signals emitted by the temperature probe 4 which correspond to the minimum temperature only after '' a predetermined time after ignition. This time delay is adjustable; the predetermined time is chosen according to the type of CO 5 probe; for the current probes it is 10 to 15 minutes, which is the time after which the probe 5 is stabilized in reading.
Par contre la sonde de température 4 doit pouvoir réagir immédiatement à une température supérieure à la température maximale prédéterminée. De préférence la sonde de température 4 est constamment sous tension, indépendamment du système de sécurité proprement dit, de telle sorte que si la sonde de température 4 détecte une température anormale , elle mette automatiquement en fonctionnement le système de sécurité.On the other hand, the temperature probe 4 must be able to react immediately to a temperature higher than the predetermined maximum temperature. Preferably the temperature probe 4 is constantly energized, independently of the security system proper, so that if the temperature probe 4 detects an abnormal temperature, it automatically activates the security system.
L'invention n'est pas limitée au mode de réalisation qui a été décrit à titre d'exemple non exhaustif mais en couvre toutes les variantes. En particulier on peut mettre en oeuvre d'autres sondes que celles décrites, ou encore des sondes additionnelles pour explorer d'autres paramètres de l'installation de chauffage: sonde de dioxyde de carbone permettant de mesurer la teneur en C0? des gaz de combustion, sonde d'oxygène permettant de mesurer la teneur en oxygène des gaz de combustion ou de l'air qui alimente l'installation. S'il est vital de détecter une présence même très faible d'oxyde de carbone, il est aussi très important de détecter l'évolution du COp et de l'Op au cours de la combustion . En effet, même en l'absence d'oxyde de carbone, une diminution d'oxygène en deçà d'un certain seuil ou une augmentation du dioxyde de carbone au-delà d'un certain seuil peuvent avoir des effets très néfastes voire mortels sur l'occupant du local où se trouve l'installation.The invention is not limited to the embodiment which has been described by way of non-exhaustive example but covers all the variants. In particular, it is possible to use other probes than those described, or even additional probes to explore other parameters of the heating installation: carbon dioxide probe making it possible to measure the content of C0 ? combustion gases, oxygen sensor for measuring the oxygen content of the combustion gases or of the air supplying the installation. If it is vital to detect even a very weak presence of carbon monoxide, it is also very important to detect the evolution of COp and Op during combustion. Even in the absence of carbon monoxide, a decrease in oxygen below a certain threshold or an increase in carbon dioxide beyond a certain threshold can have very harmful or even fatal effects on the occupant of the room where the installation is located.
De plus l'interruption de la combustion peut être obtenue soit en coupant l'alimentation de combustible comme cela a été décrit dans l'exemple ci-dessus, soit en étouffant la flamme par des moyens appropriés. De tels moyens peuvent être mécaniques, dans ce cas le dispositif d'interruption 2 comporte des moyens aptes à escamoter la mèche dans son logement; ces moyens pourraient éventuellement être chimiques, du type extincteur.In addition, the combustion can be interrupted either by cutting the fuel supply as has been described in the example above, either by smothering the flame by appropriate means. Such means can be mechanical, in this case the interrupting device 2 comprises means capable of retracting the wick in its housing; these means could possibly be chemical, of the extinguisher type.
Dans le cas où l'installation fonctionne au gaz, le dispositif d'interruption sera une électrovanne apte à couper l'alimentation en gaz.In the case where the installation operates on gas, the interruption device will be a solenoid valve capable of cutting off the gas supply.
Toutes les sondes mises en oeuvre dans le système de sécurité de l'invention sont des sondes classiques, bien connues par ailleurs ; c'est pour cette raison qu'elles n'ont pas été décrites plus avant. De plus les valeurs prédéterminées, qui constituent les seuils correspondant à un danger potentiel, sont en ce qui concerne les sondes de CO, de C0? et d'Op fixées dans les normes imposées aux constructeurs par les différentes législations nationales ou internationales. All the probes used in the security system of the invention are conventional probes, well known elsewhere; it is for this reason that they have not been described further. In addition, the predetermined values, which constitute the thresholds corresponding to a potential danger, are with regard to the CO, C0 ? and of Op fixed in the standards imposed on the manufacturers by the various national or international legislations.

Claims

REVENDICATIONS
1. Système de sécurité pour installation de chauffage à combustion comprenant d'une part une ou plusieurs sondes (4,5,6,7) aptes à explorer des situations indiquant un danger potentiel à l'intérieur de ladite installation de chauffage et d'autre part un dispositif d'interruption (1,2) capable d'arrêter le processus de combustion en cas de danger potentiel détecté par au moins une sonde.1. Safety system for a combustion heating installation comprising on the one hand one or more probes (4,5,6,7) capable of exploring situations indicating a potential danger inside said heating and on the other hand an interruption device (1,2) capable of stopping the combustion process in the event of a potential danger detected by at least one probe.
2. Système de sécurité , selon la revendication 1, caractérisé en ce qu'il comprend au moins une sonde parmi les sondes suivantes: - une sonde (4) qui explore la température de l'installation de chauffage,2. Security system according to claim 1, characterized in that it comprises at least one probe from among the following probes: - a probe (4) which explores the temperature of the heating installation,
- une sonde de CO (5) qui explore la teneur en CO des gaz de combustion, une sonde (6) qui explore la valeur de la tension d'alimentation,- a CO probe (5) which explores the CO content of the combustion gases, a probe (6) which explores the value of the supply voltage,
- une sonde (7) qui explore les ruptures de fil, une sonde qui mesure la teneur en oxygène des gaz de combustion ou de l'air fourni,- a probe (7) which explores breaks in the wire, a probe which measures the oxygen content of the combustion gases or of the air supplied,
- une sonde qui mesure la teneur en dioxyde de carbone des gaz de combustion.- a probe which measures the carbon dioxide content of the combustion gases.
3. Système de sécurité selon la revendication 2 caractérisé en ce qu'il comporte une temporisation, grâce à laquelle ledit système ne réagit aux indications en provenance de tout ou partie des sondes qu'après un temps prédéterminé après l'allumage de l'installation.3. Security system according to claim 2 characterized in that it includes a time delay, by means of which said system does not react to indications from all or part of the probes until after a predetermined time after switching on the installation. .
4. Système selon la revendication 3 caractérisé en ce que, s'agissant de la sonde d'oxyde de carbone, le temps prédéterminé est de l'ordre de 10 à 15 minutes.4. System according to claim 3 characterized in that, as regards the carbon monoxide probe, the predetermined time is of the order of 10 to 15 minutes.
5. Système de sécurité , selon la revendication 1, caractérisé en ce qu'il signale une anomalie lorsqu'il détecte l'une des irrégularités suivantes :5. Security system according to claim 1, characterized in that it signals an anomaly when it detects one of the following irregularities:
- une température de l'installation de chauffage dépassant une valeur minimum,- a temperature of the heating installation exceeding a minimum value,
- une teneur en C0 des gaz de combustion dépassant une valeur maximum ,- a C0 content of the combustion gases exceeding a value maximum,
- la chute de la tension d'alimentation en dessous d'une valeur minimum,- the drop in the supply voltage below a minimum value,
- une température de l'installation de chauffage ayant chuté en dessous d'une valeur minimum,- a temperature of the heating installation having dropped below a minimum value,
- une valeur de la teneur en oxygène des gaz de combustion ou de l'air fourni dépassant une valeur chutant en-dessous d'une valeur minimum,- a value of the oxygen content of the combustion gases or the supplied air exceeding a value falling below a minimum value,
- ou une valeur de la teneur en dioxyde de carbone des gaz de combustion dépassant une valeur maximum.- or a value of the carbon dioxide content of the combustion gases exceeding a maximum value.
6. Système de sécurité , selon la revendication 5, caractérisé en ce qu'il contient un organe indicateur permettant de connaître la nature de l'anomalie détectée.6. Security system according to claim 5, characterized in that it contains an indicator member allowing to know the nature of the detected anomaly.
7. Système de sécurité , selon la revendication 1, caractérisé en ce que son dispositif d'interruption (2) est composé d'un interrupteur de l'approvisionnement en combustible.7. Security system according to claim 1, characterized in that its interruption device (2) is composed of a switch of the fuel supply.
8. Système de sécurité , selon la revendication 7, caractérisé en ce que l'interrupteur de l'approvisionnement en combustible est composé d'une valve actionnée par un solénoïde ou par un moteur électrique.8. Security system according to claim 7, characterized in that the fuel supply switch is composed of a valve actuated by a solenoid or by an electric motor.
9. Système de sécurité , selon la revendication 1, caractérisé en ce qu'il comporte un circuit de contrôle centralisé (1), programmé pour empêcher l'allumage de l'installation de chauffage, lorsque la température interne de celle-ci dépasse une certaine valeur ou lorsqu'une anomalie a été détectée. 9. Security system according to claim 1, characterized in that it comprises a centralized control circuit (1), programmed to prevent the ignition of the heating installation, when the internal temperature thereof exceeds a certain value or when an anomaly has been detected.
PCT/FR1991/000257 1990-04-04 1991-04-03 Security system for a combustion heating installation WO1991015716A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9000789 1990-04-04
NL9000789A NL9000789A (en) 1990-04-04 1990-04-04 PROTECTION CIRCUIT FOR A HEATING DEVICE.

Publications (1)

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WO1991015716A1 true WO1991015716A1 (en) 1991-10-17

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PCT/FR1991/000257 WO1991015716A1 (en) 1990-04-04 1991-04-03 Security system for a combustion heating installation

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EP (1) EP0484475A1 (en)
NL (1) NL9000789A (en)
PT (1) PT97238A (en)
WO (1) WO1991015716A1 (en)

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US5477913A (en) * 1993-04-22 1995-12-26 Homer, Inc. System for controlling a heating/air conditioning unit
WO1997030313A1 (en) * 1996-02-20 1997-08-21 Polk Steven A Heating system disabler
WO1999026209A1 (en) * 1997-11-17 1999-05-27 Francesco Longobardi An electronic device for the remote control, in real time, for boilers and similar
BE1013369A3 (en) * 2000-04-04 2001-12-04 Amatucci Aldo Gas explosion safety devices

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5477913A (en) * 1993-04-22 1995-12-26 Homer, Inc. System for controlling a heating/air conditioning unit
US5540273A (en) * 1993-04-22 1996-07-30 Homer, Inc. Method for controlling a heating unit
WO1997030313A1 (en) * 1996-02-20 1997-08-21 Polk Steven A Heating system disabler
WO1999026209A1 (en) * 1997-11-17 1999-05-27 Francesco Longobardi An electronic device for the remote control, in real time, for boilers and similar
BE1013369A3 (en) * 2000-04-04 2001-12-04 Amatucci Aldo Gas explosion safety devices

Also Published As

Publication number Publication date
EP0484475A1 (en) 1992-05-13
NL9000789A (en) 1991-11-01
PT97238A (en) 1993-06-30

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