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EP0728990A1 - Gas valve for an electronically controlled both gas burner without a permanent pilot flame - Google Patents

Gas valve for an electronically controlled both gas burner without a permanent pilot flame Download PDF

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Publication number
EP0728990A1
EP0728990A1 EP96400288A EP96400288A EP0728990A1 EP 0728990 A1 EP0728990 A1 EP 0728990A1 EP 96400288 A EP96400288 A EP 96400288A EP 96400288 A EP96400288 A EP 96400288A EP 0728990 A1 EP0728990 A1 EP 0728990A1
Authority
EP
European Patent Office
Prior art keywords
gas
valve
burner
membrane
ignition
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.)
Withdrawn
Application number
EP96400288A
Other languages
German (de)
French (fr)
Inventor
Michel Spaeth
Régis Cazin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Publication of EP0728990A1 publication Critical patent/EP0728990A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/007—Regulating fuel supply using mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/085—Regulating fuel supply conjointly with another medium, e.g. boiler water using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/22—Pilot burners
    • F23N2227/24—Pilot burners the pilot burner not burning continuously
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/28—Ignition circuits
    • F23N2227/30—Ignition circuits for pilot burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/36—Spark ignition, e.g. by means of a high voltage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/18—Groups of two or more valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/20—Membrane valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2235/00—Valves, nozzles or pumps
    • F23N2235/12—Fuel valves
    • F23N2235/22—Fuel valves cooperating with magnets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods

Definitions

  • the invention relates to a gas bath heater without permanent pilot light with electronic control and more specifically relates to its gas mechanism associated with a magnetic nozzle for holding the gas inlet valve to the burner in the open position.
  • a control and safety device consisting on the one hand of a water valve which acts on a first valve disposed at the inlet of the supply line in gas and on the other hand a valve controlled by the pressure of the gas which controls a second valve.
  • This valve is mechanically controlled by a membrane, one of the faces of which is permanently subjected to the pressure of the outside air and the other of which can be subjected to the pressure of the gas taken upstream of the control valve through another small valve controlled by a thermosensitive device with low inertia which detects the ignition of an ignition burner.
  • This detection device capable of reacting to the extinction of the ignition burner stops the admission of gas to the main burner.
  • the manometric capsule system consisting of a small sealed enclosure or bulb filled with air, placed in the flame that is to be detected and of a capillary tube, connected to a nozzle closed by a small expandable membrane which swells under the effect of the expansion of the air in the bulb and can operate a valve.
  • the Applicant has therefore endeavored to find a solution adapted to this device, which considerably reduces the electrical consumption and makes it possible to increase the lifespan of the batteries.
  • a main object of the present invention therefore consists of a gas mechanism for a gas bath heater without a permanent pilot light comprising an ignition electrode and a flame detector near an ignition burner, as well as a control unit.
  • a gas mechanism for a gas bath heater without a permanent pilot light comprising an ignition electrode and a flame detector near an ignition burner, as well as a control unit.
  • a membrane acting on a gas inlet valve to the burner membrane delimiting two chambers in the control unit, one of which is placed in communication with the gas inlet chamber upstream of the inlet valve, during the opening of a small valve recalled by a spring, the operating member of the small valve connecting a chamber with the gas intake pipe, being controlled by an electronic unit which also controls the ignition of the burner d ignition, as a function of the control provided by the flame detector, mechanism by which the membrane of the control unit is connected to a magnetic tip ensuring the maintenance of said membrane in p opening position of the gas inlet valve to the burner, under the control of the housing electronic.
  • the magnetic tip is placed in a well provided under the control unit and cooperates with a metal pad mounted at the end of the connecting rod between the intake valve and the membrane.
  • a first gas distribution chamber 28 is provided between the inlet duct and the intake chamber.
  • a first main valve 4 closes the gas at the entrance to this chamber 28. It is operated in the conventional manner by a water valve 5.
  • the valve 4 is integral with a profiled control valve 29 which can be moved inside an orifice 30 connecting the chambers 28 and 2.
  • a return spring 31 maintains the assembly in the position shown in the figure.
  • a burner valve 6 closes the gas inlet to the manifold 3.
  • the valve 6 is part of a movable assembly consisting of a vertical rod 7 recalled by a spring 16 connected to the membrane 8 of a control unit 9 divided into two chambers 10 and 11 by said membrane.
  • the upper chamber 11 communicates via a conduit 12 with the distribution chamber 28.
  • the lower chamber 10 is in communication with said conduit 12 and therefore with the distribution chamber, via a passage orifice 13 closed by a small valve 14 operated by an electromagnet 15 against the return force of a spring not shown.
  • the lower chamber 10 is also connected, by means of a supply channel 19, to an ignition burner 20. The latter is ignited by a ignition electrode 21. The flame is detected by a flame detection electrode 22.
  • a well 17 serving as a housing with magnetic tip 18.
  • a metal pad 25 mounted at the end of the rod 7. The pad is therefore integral with the movements of the membrane and can s 'apply to the nozzle.
  • the mechanism thus described is electronically controlled by an electronic unit 23 to which the electromagnet 15 is connected by a connection circuit 24. Similarly, it is connected to the magnetic end piece 18 by the circuit 26.
  • a flow detector shown diagrammatically at 27 allows the power supply of the electronic unit. The latter is also connected to the ignition electrode 21 and the flame detection electrode 22. The latter is placed both on the ignition burner 20 and the main burner ramp 3.
  • the electrode 22 is an ionization detection electrode based on the fact that the flame can be assimilated to a diode. An AC current source is then filtered, the filtered signal then being processed by a control interface which authorizes the opening of the valve.
  • This system can have a response time much lower than current mechanical systems and also has the advantage of being able to manage other safeties.
  • the electronic unit therefore authorizes the operation of such a type of detector.
  • the water membrane 5 When water is drawn by a user, the water membrane 5 lifts in the direction of the small arrows and opens the main valve 4 against its return spring. The gas then occupies the distribution chamber 28 and the intake chamber 2, but it is stopped by the valve 6 applied against its seat by the spring 16. On the other hand, it can penetrate into the chamber 10, the valve 14 being in open position. The gas therefore passes through the supply channel 19 and feeds the ignition burner 20.
  • the flow detector 27 which has picked up the drawing request supplies the housing electronic 23 authorizing a train of sparks via the timed ignition electrode 21.
  • the ignition burner 20 ignites and the flame detection electrode 22 controls the electrical supply to the electromagnet 15 The latter being excited closes the valve 14 which interrupts the admission of gas to the chamber 10.
  • the gas pressure in the chamber 11 is no longer compensated by that of the chamber 10, the membrane 8 will move towards the bottom and open the valve 6 by means of the rod 7 against the return force of the spring 16.
  • the gas can therefore reach the burner ramp 3 and it ignites on contact with the ignition burner 20
  • the membrane 8 being in the low position, the patch 25 will come to sticking against the magnetic tip 18 and it is this which will therefore keep the valve 6 in the open position.
  • the electromagnet 15 is therefore only ordered to close at the start of each drawing for a very short time at the end of which it is the magnetic tip 18 which is supplied until the drawing is completed. This sequencing of commands allows an appreciable gain in electricity consumption and therefore a longer battery life.
  • valve 4 closes and in parallel the flow detector 27 opens and cuts the electrical supply to the electronic unit 23.
  • the magnetic tip 18 is no longer supplied and releases the tablet 25 this which allows the spring 16 to close the main valve 6, thereby interrupting the supply of gas to the burner.
  • the device also makes it possible to stop the device, during drawing, as soon as there is an operating anomaly, for example a backflow, an overheating, etc. which cause the power supply to the electronic unit to be cut off. and consequently shutting down the device.
  • an operating anomaly for example a backflow, an overheating, etc. which cause the power supply to the electronic unit to be cut off. and consequently shutting down the device.

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

Abstract

The mechanism has an ignition electrode (21) and flame detector (22), adjacent to the ignition burner (20). A control box (9) encloses a membrane (8) acting on a valve (6), admitting gas to the burner (3). The membrane forms two chambers (10,11) in the control box, one communicating with the gas admission chamber (2), upstream of the admission valve. A small valve (14), spring returned, communicates with the gas admission chamber (2,10), its operating coil (15) being controlled by an electronic circuit (23). This circuit also pilots the ignition burner, under control of the flame detector. An electromagnet (18) maintains the membrane in the open position, to admit gas to the burner, under control of the electronic circuit.

Description

L'invention concerne un chauffe-bains à gaz sans veilleuse permanente à commande électronique et porte plus précisément sur son mécanisme gaz associé à un embout magnétique de maintien en position d'ouverture du clapet d'admission gaz au brûleur.The invention relates to a gas bath heater without permanent pilot light with electronic control and more specifically relates to its gas mechanism associated with a magnetic nozzle for holding the gas inlet valve to the burner in the open position.

Dans un appareil de ce type, il est bien connu d'utiliser un dispositif de commande et de sécurité constitué d'une part d'une valve à eau qui agit sur un premier clapet disposé à l'entrée de la ligne d'alimentation en gaz et d'autre part d'une valve pilotée par la pression du gaz qui commande un deuxième clapet. Cette valve est asservie mécaniquement à une membrane dont l'une des faces est soumise en permanence à la pression de l'air extérieur et dont l'autre peut être soumise à la pression du gaz prise en amont du clapet de commande à travers un autre petit clapet commandé par un dispositif thermosensible à faible inertie qui détecte l'allumage d'un brûleur d'allumage.In an apparatus of this type, it is well known to use a control and safety device consisting on the one hand of a water valve which acts on a first valve disposed at the inlet of the supply line in gas and on the other hand a valve controlled by the pressure of the gas which controls a second valve. This valve is mechanically controlled by a membrane, one of the faces of which is permanently subjected to the pressure of the outside air and the other of which can be subjected to the pressure of the gas taken upstream of the control valve through another small valve controlled by a thermosensitive device with low inertia which detects the ignition of an ignition burner.

Ce dispositif de détection apte à réagir à l'extinction du brûleur d'allumage arrête l'admission du gaz au brûleur principal.This detection device capable of reacting to the extinction of the ignition burner stops the admission of gas to the main burner.

Parmi ces dispositifs de détection de flamme on connaît le système à capsule manométrique constitué d'une petite enceinte étanche ou bulbe rempli d'air, placé dans la flammme qu'on veut détecter et d'un tube capillaire, raccordé à un embout fermé par une petite membrane dilatable qui se gonfle sous l'effet de la dilatation de l'air du bulbe et peut manoeuvrer un clapet.Among these flame detection devices is known the manometric capsule system consisting of a small sealed enclosure or bulb filled with air, placed in the flame that is to be detected and of a capillary tube, connected to a nozzle closed by a small expandable membrane which swells under the effect of the expansion of the air in the bulb and can operate a valve.

Mais si le bulbe est défectueux, l'absence de pression ferme immédiatement le gaz par retour de la membrane dans sa position initiale. En outre le bulbe n'autorise pas aisément un temps de réponse rapide, sauf à être dans la flamme auquel cas sa fiabilité serait diminuée. On sait résoudre avantageusement ce problème en utilisant un mécanisme à commande électronique ayant un dispositif de sécurité dont le détecteur de flamme ne présente pas les inconvénients inhérents aux systèmes connus à bulbe ou à thermocouple. Pour cela il est prévu une électrode placée sur le brûleur d'allumage ainsi qu'une autre électrode pour la détection de flamme placée sur le brûleur d'allumage et le brûleur principal. Un boîtier électronique alimenté par piles pilote l'ouverture du clapet d'admission gaz au brûleur d'allumage par l'intermédiaire d'une petite électrovanne. Ensuite l'électrovanne est maintenue ouverte tout le temps que dure le puisage pour que le gaz reste présent dans la valve à la pression requise afin que le clapet d'admission du gaz au brûleur principal demeure ouvert.But if the bulb is defective, the absence of pressure immediately closes the gas by returning the membrane to its initial position. In addition, the bulb does not easily allow a rapid response time, except to be in the flame in which case its reliability would be reduced. It is known to advantageously solve this problem by using an electronically controlled mechanism having a safety device whose flame detector does not have the drawbacks inherent in known bulb or thermocouple systems. For this there is provided an electrode placed on the ignition burner as well as another flame detection electrode placed on the ignition burner and the main burner. An electronic box powered by batteries controls the opening of the gas inlet valve to the ignition burner via a small solenoid valve. Then the solenoid valve is kept open all the time that the drawing lasts so that the gas remains present in the valve at the required pressure so that the gas inlet valve to the main burner remains open.

Mais avec ce dispositif à commande électronique, alimenté par piles, la consommation d'énergie durant la phase d'allumage aussi bien que pendant le fonctionnement, n'est pas négligeable et nuit à l'autonomie de l'appareil.But with this electronic control device, powered by batteries, the energy consumption during the ignition phase as well as during operation, is not negligible and affects the autonomy of the device.

La Demanderesse s'est donc attachée à trouver une solution adaptée à ce dispositif, qui réduit considérablement la consommation électrique et permet d'accroître la durée de vie des piles.The Applicant has therefore endeavored to find a solution adapted to this device, which considerably reduces the electrical consumption and makes it possible to increase the lifespan of the batteries.

Un objet principal de la présente invention consiste donc en un mécanisme gaz pour chauffe-bains à gaz sans veilleuse permanente comportant une électrode d'allumage et un détecteur de flamme à proximité d'un brûleur d'allumage, ainsi qu'un boîtier de commande renfermant une membrane agissant sur un clapet d'admission du gaz au brûleur, membrane délimitant deux chambres dans le boîtier de commande, dont l'une est mise en communication avec la chambre d'admission de gaz en amont du clapet d'admission, lors de l'ouverture d'un petit clapet rappelé par un ressort, l'organe de manoeuvre du petit clapet mettant en communication une chambre avec la canalisation d'admission gaz, étant commandé par un boîtier électronique qui pilote également l'allumage du brûleur d'allumage, en fonction du contrôle assuré par le détecteur de flamme, mécanisme selon lequel la membrane du boîtier de commande est reliée à un embout magnétique assurant le maintien de ladite membrane en position d'ouverture du clapet d'admission gaz au brûleur, sous le contrôle du boîtier électronique.A main object of the present invention therefore consists of a gas mechanism for a gas bath heater without a permanent pilot light comprising an ignition electrode and a flame detector near an ignition burner, as well as a control unit. containing a membrane acting on a gas inlet valve to the burner, membrane delimiting two chambers in the control unit, one of which is placed in communication with the gas inlet chamber upstream of the inlet valve, during the opening of a small valve recalled by a spring, the operating member of the small valve connecting a chamber with the gas intake pipe, being controlled by an electronic unit which also controls the ignition of the burner d ignition, as a function of the control provided by the flame detector, mechanism by which the membrane of the control unit is connected to a magnetic tip ensuring the maintenance of said membrane in p opening position of the gas inlet valve to the burner, under the control of the housing electronic.

Selon une caractéristique particulière de l'invention, l'embout magnétique est placé dans un puits prévu sous le boîtier de commande et coopère avec une pastille métallique montée en bout de la tige de liaison entre le clapet d'admission et la membrane.According to a particular characteristic of the invention, the magnetic tip is placed in a well provided under the control unit and cooperates with a metal pad mounted at the end of the connecting rod between the intake valve and the membrane.

D'autres caractéristiques particulières et avantages de l'invention ressortiront maintenant de la description qui va suivre d'un exemple non limitatif de réalisation, faisant référence au dessin unique annexé qui représente une vue schématique en coupe du mécanisme.Other particular characteristics and advantages of the invention will now emerge from the description which follows of a nonlimiting exemplary embodiment, referring to the single appended drawing which represents a schematic sectional view of the mechanism.

On voit sur la figure l'ensemble du mécanisme d'un appareil auquel le gaz arrive par un conduit d'arrivée 1 dans une chambre d'admission 2 menant à une rampe de brûleur 3. Une première chambre de distribution de gaz 28 est prévue entre le conduit d'arrivée et la chambre d'admission. Un premier clapet principal 4 ferme le gaz à l'entrée de cette chambre 28. Il est manoeuvré de façon classique par une valve à eau 5. Le clapet 4 est solidaire d'un clapet profilé de régulation 29 déplaçable à l'intérieur d'un orifice 30 faisant communiquer les chambres 28 et 2. Un ressort de rappel 31 maintient l'ensemble dans la position représentée sur la figure. A l'autre bout et en aval de la chambre d'admission 2, un clapet de brûleur 6 ferme l'entrée de gaz à la rampe 3. Le clapet 6 fait partie d'un équipage mobile constitué d'une tige verticale 7 rappelée par un ressort 16 reliée à la membrane 8 d'un boîtier de commande 9 divisé en deux chambres 10 et 11 par ladite membrane. La chambre supérieure 11 communique par un conduit 12 avec la chambre de distribution 28. La chambre inférieure 10 est en communication avec ledit conduit 12 et donc avec la chambre de distribution, par l'intermédiaire d'un orifice de passage 13 fermé par un petit clapet 14 manoeuvré par un électroaimant 15 à l'encontre de la force de rappel d'un ressort non représenté. La chambre inférieure 10 est reliée par ailleurs, grâce à un canal d'alimentation 19, à un brûleur d'allumage 20. Ce dernier est allumé par une électrode d'allumage 21. La flamme est détectée par une électrode de détection de flamme 22.We see in the figure the entire mechanism of an apparatus to which the gas arrives via an inlet pipe 1 into an intake chamber 2 leading to a burner rail 3. A first gas distribution chamber 28 is provided between the inlet duct and the intake chamber. A first main valve 4 closes the gas at the entrance to this chamber 28. It is operated in the conventional manner by a water valve 5. The valve 4 is integral with a profiled control valve 29 which can be moved inside an orifice 30 connecting the chambers 28 and 2. A return spring 31 maintains the assembly in the position shown in the figure. At the other end and downstream of the intake chamber 2, a burner valve 6 closes the gas inlet to the manifold 3. The valve 6 is part of a movable assembly consisting of a vertical rod 7 recalled by a spring 16 connected to the membrane 8 of a control unit 9 divided into two chambers 10 and 11 by said membrane. The upper chamber 11 communicates via a conduit 12 with the distribution chamber 28. The lower chamber 10 is in communication with said conduit 12 and therefore with the distribution chamber, via a passage orifice 13 closed by a small valve 14 operated by an electromagnet 15 against the return force of a spring not shown. The lower chamber 10 is also connected, by means of a supply channel 19, to an ignition burner 20. The latter is ignited by a ignition electrode 21. The flame is detected by a flame detection electrode 22.

Sous le boîtier de commande 9 est prévu un puits 17 servant de logement à embout magnétique 18. Dans le puits 17 peut coulisser une pastille métallique 25 montée en bout de la tige 7. La pastille est donc solidaire des mouvements de la membrane et peut s'appliquer sur l'embout.Under the control box 9 is provided a well 17 serving as a housing with magnetic tip 18. In the well 17 can slide a metal pad 25 mounted at the end of the rod 7. The pad is therefore integral with the movements of the membrane and can s 'apply to the nozzle.

Le mécanisme ainsi décrit est commandé électroniquement par un boîtier électronique 23 auquel est connecté l'électroaimant 15 par un circuit de connexion 24. De même il est relié à l'embout magnétique 18 par le circuit 26. Un détecteur de débit schématisé en 27 permet l'alimentation du boîtier électronique. Ce dernier est en outre en liaison avec l'électrode d'allumage 21 et l'électrode de détection de flamme 22. Celle-ci est placée à la fois sur le brûleur d'allumage 20 et la rampe de brûleur principal 3.The mechanism thus described is electronically controlled by an electronic unit 23 to which the electromagnet 15 is connected by a connection circuit 24. Similarly, it is connected to the magnetic end piece 18 by the circuit 26. A flow detector shown diagrammatically at 27 allows the power supply of the electronic unit. The latter is also connected to the ignition electrode 21 and the flame detection electrode 22. The latter is placed both on the ignition burner 20 and the main burner ramp 3.

L'électrode 22 est une électrode de détection à ionisation basée sur le fait que la flamme peut être assimilée à une diode. On filtre alors une source de courant alternative, le signal filtré étant alors traité par un interface de commande qui autorise l'ouverture de la vanne. Ce système peut avoir un temps de réponse bien inférieur aux systèmes mécaniques actuels et présente aussi l'avantage de pouvoir gérer d'autres sécurités. Le boîtier électronique autorise donc l'exploitation d'un tel type de détecteur.The electrode 22 is an ionization detection electrode based on the fact that the flame can be assimilated to a diode. An AC current source is then filtered, the filtered signal then being processed by a control interface which authorizes the opening of the valve. This system can have a response time much lower than current mechanical systems and also has the advantage of being able to manage other safeties. The electronic unit therefore authorizes the operation of such a type of detector.

Quand un puisage est effectué par un utilisateur la membrane à eau 5 se soulève dans le sens des petites flèches et ouvre le clapet principal 4 à l'encontre de son ressort de rappel. Le gaz occupe alors la chambre de distribution 28 et la chambre d'admission 2, mais il est arrêté par le clapet 6 appliqué contre son siège par le ressort 16. Par contre, il peut pénétrer dans la chambre 10, le clapet 14 étant en position d'ouverture. Le gaz passe donc dans le canal d'alimentation 19 et alimente le brûleur d'allumage 20. Dans le même temps, le détecteur de débit 27 qui a capté la demande de puisage alimente le boîtier électronique 23 autorisant un train d'étincelles par l'intermédiaire de l'électrode d'allumage temporisée 21. Le brûleur d'allumage 20 s'allume et l'électrode de détection de flamme 22 commande l'alimentation électrique de l'électroaimant 15. Celui-ci étant excité ferme le clapet 14 qui interrompt l'admission de gaz à la chambre 10. La pression de gaz dans la chambre 11 n'étant plus compensée par celle de la chambre 10, la membrane 8 va se déplacer vers le bas et ouvrir le clapet 6 par l'intermédiaire de la tige 7 à l'encontre de la force de rappel du ressort 16. Le gaz peut donc atteindre la rampe de brûleur 3 et il s'enflamme au contact du brûleur d'allumage 20. Dans le même temps, la membrane 8 étant en position basse, la pastille 25 va venir au collage contre l'embout magnétique 18 et c'est celui-ci qui maintiendra donc le clapet 6 en position d'ouverture. L'électroaimant 15 n'est donc commandé à la fermeture au début de chaque puisage que durant un temps très court à l'issue duquel c'est l'embout magnétique 18 qui est alimenté jusqu'à la fin du puisage. Ce séquencement des commandes permet un gain appréciable de consommation électrique et donc une durée de vie accrue des piles.When water is drawn by a user, the water membrane 5 lifts in the direction of the small arrows and opens the main valve 4 against its return spring. The gas then occupies the distribution chamber 28 and the intake chamber 2, but it is stopped by the valve 6 applied against its seat by the spring 16. On the other hand, it can penetrate into the chamber 10, the valve 14 being in open position. The gas therefore passes through the supply channel 19 and feeds the ignition burner 20. At the same time, the flow detector 27 which has picked up the drawing request supplies the housing electronic 23 authorizing a train of sparks via the timed ignition electrode 21. The ignition burner 20 ignites and the flame detection electrode 22 controls the electrical supply to the electromagnet 15 The latter being excited closes the valve 14 which interrupts the admission of gas to the chamber 10. The gas pressure in the chamber 11 is no longer compensated by that of the chamber 10, the membrane 8 will move towards the bottom and open the valve 6 by means of the rod 7 against the return force of the spring 16. The gas can therefore reach the burner ramp 3 and it ignites on contact with the ignition burner 20 At the same time, the membrane 8 being in the low position, the patch 25 will come to sticking against the magnetic tip 18 and it is this which will therefore keep the valve 6 in the open position. The electromagnet 15 is therefore only ordered to close at the start of each drawing for a very short time at the end of which it is the magnetic tip 18 which is supplied until the drawing is completed. This sequencing of commands allows an appreciable gain in electricity consumption and therefore a longer battery life.

Quand l'utilisateur arrête le puisage, le clapet 4 se referme et parallèlement le détecteur de débit 27 s'ouvre et coupe l'alimentation électrique du boîtier électronique 23. L'embout magnétique 18 n'est plus alimenté et libère la pastille 25 ce qui permet au ressort 16 de refermer le clapet principal 6, interrompant ainsi l'arrivée du gaz au brûleur.When the user stops drawing, the valve 4 closes and in parallel the flow detector 27 opens and cuts the electrical supply to the electronic unit 23. The magnetic tip 18 is no longer supplied and releases the tablet 25 this which allows the spring 16 to close the main valve 6, thereby interrupting the supply of gas to the burner.

Le dispositif permet également l'arrêt de l'appareil, en cours de puisage, dès qu'il y a une anomalie de fonctionnement, par exemple un refoulement, une surchauffe etc... qui entraînent la coupure de l'alimentation du boîtier électronique et en conséquence l'arrêt de l'appareil.The device also makes it possible to stop the device, during drawing, as soon as there is an operating anomaly, for example a backflow, an overheating, etc. which cause the power supply to the electronic unit to be cut off. and consequently shutting down the device.

Claims (3)

Mécanisme gaz pour chauffe-bains à gaz sans veilleuse permanente comportant une électrode d'allumage (21) et un détecteur de flamme (22) à proximité d'un brûleur d'allumage (20), ainsi qu'un boîtier de commande (9) renfermant une membrane (8) agissant sur un clapet (6) d'admission du gaz au brûleur (3), membrane délimitant deux chambres (10, 11) dans le boîtier de commande, dont l'une est mise en communication avec la chambre (2) d'admission de gaz en amont du clapet d'admission, lors de l'ouverture d'un petit clapet (14) rappelé par un ressort, l'organe de manoeuvre (15) du petit clapet mettant en communication une chambre (10) avec la canalisation d'admission gaz (2), étant commandé par un boîtier électronique (23) qui pilote également l'allumage d'un brûleur d'allumage (20) en fonction du contrôle assuré par le détecteur de flamme (22), caractérisé en ce que la membrane (8) du boîtier de commande (9) est reliée à un embout magnétique (18) assurant le maintien de ladite membrane en position d'ouverture du clapet (6) d'admission gaz au brûleur, sous le contrôle du boîtier électronique (23).Gas mechanism for gas bath heaters without permanent pilot light comprising an ignition electrode (21) and a flame detector (22) near an ignition burner (20), as well as a control unit (9 ) containing a membrane (8) acting on a valve (6) for admitting gas to the burner (3), membrane delimiting two chambers (10, 11) in the control unit, one of which is placed in communication with the gas inlet chamber (2) upstream of the inlet valve, when a small valve (14) returned by a spring is opened, the operating member (15) of the small valve connecting a chamber (10) with the gas inlet pipe (2), being controlled by an electronic unit (23) which also controls the ignition of an ignition burner (20) according to the control provided by the flame detector (22), characterized in that the membrane (8) of the control unit (9) is connected to a magnetic tip (18) ensuring the maintenance ien of said membrane in the open position of the gas inlet valve (6) to the burner, under the control of the electronic unit (23). Mécanisme gaz selon la revendication 1, caractérisé en ce que l'embout magnétique (18) est placé dans un puits (17) prévu sous le boîtier de commande (9) et coopère avec une pastille métallique (25) montée en bout de la tige (7) de liaison entre le clapet d'admission gaz (6) et la membrane (8).Gas mechanism according to claim 1, characterized in that the magnetic end piece (18) is placed in a well (17) provided under the control unit (9) and cooperates with a metal disc (25) mounted at the end of the rod (7) for connection between the gas inlet valve (6) and the membrane (8). Mécanisme gaz selon la revendication 1, caractérisé en ce que l'organe de manoeuvre du clapet (14) est un électroaimant (15) relié au boîtier électronique (23) par un circuit de connexion (24).Gas mechanism according to claim 1, characterized in that the valve operating member (14) is an electromagnet (15) connected to the electronic unit (23) by a connection circuit (24).
EP96400288A 1995-02-21 1996-02-13 Gas valve for an electronically controlled both gas burner without a permanent pilot flame Withdrawn EP0728990A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9501970 1995-02-21
FR9501970A FR2730794B1 (en) 1995-02-21 1995-02-21 GAS MECHANISM FOR GAS BATH HEATERS WITHOUT PERMANENT PILOT LIGHT WITH ELECTRONIC CONTROL

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EP0728990A1 true EP0728990A1 (en) 1996-08-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1126218A3 (en) * 2000-02-15 2003-09-24 Hans-Jochen Dr. Schwarz Gas valve and burner automat for a gas burner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2006658A1 (en) * 1969-02-14 1970-09-03 Society Saunier Duval S.A., Paris Device for monitoring the pressure drop and interrupting the gas supply to rapidly heated hot water storage tanks and bath stoves
EP0240394A1 (en) * 1986-03-06 1987-10-07 Chaffoteaux & Maury Water or bath gas burner
FR2618527A1 (en) * 1987-07-20 1989-01-27 Gaz De France Device for sequentially regulating the supply of gaseous fuel to a heat generator
DE8901428U1 (en) * 1988-02-08 1989-03-23 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Instantaneous water heater

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2006658A1 (en) * 1969-02-14 1970-09-03 Society Saunier Duval S.A., Paris Device for monitoring the pressure drop and interrupting the gas supply to rapidly heated hot water storage tanks and bath stoves
EP0240394A1 (en) * 1986-03-06 1987-10-07 Chaffoteaux & Maury Water or bath gas burner
FR2618527A1 (en) * 1987-07-20 1989-01-27 Gaz De France Device for sequentially regulating the supply of gaseous fuel to a heat generator
DE8901428U1 (en) * 1988-02-08 1989-03-23 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Instantaneous water heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1126218A3 (en) * 2000-02-15 2003-09-24 Hans-Jochen Dr. Schwarz Gas valve and burner automat for a gas burner

Also Published As

Publication number Publication date
FR2730794B1 (en) 1997-04-25
FR2730794A1 (en) 1996-08-23

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