EP3596392B1 - Thermocouple d'entraînement d'éléments de commande d'alimentation en gaz, système de commande d'alimentation en gaz et procédé de commande d'éléments de commande d'alimentation en gaz - Google Patents

Thermocouple d'entraînement d'éléments de commande d'alimentation en gaz, système de commande d'alimentation en gaz et procédé de commande d'éléments de commande d'alimentation en gaz Download PDF

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Publication number
EP3596392B1
EP3596392B1 EP18714840.8A EP18714840A EP3596392B1 EP 3596392 B1 EP3596392 B1 EP 3596392B1 EP 18714840 A EP18714840 A EP 18714840A EP 3596392 B1 EP3596392 B1 EP 3596392B1
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EP
European Patent Office
Prior art keywords
solid
circuit breaker
state circuit
gas
thermocouple
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EP18714840.8A
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German (de)
English (en)
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EP3596392A1 (fr
EP3596392C0 (fr
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Ivan FUMAGALLI
Augusto Marco CULATTI
Gilberto BELDI'
Raoul Bianchi
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Castfutura SpA
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Castfutura SpA
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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
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/105—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using electrical or electromechanical means
    • 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

Definitions

  • the present invention concerns a thermocouple assembly comprising a temperature sensor operating in accordance with the thermoelectric effect and having an output controlling an electromagnetic member driving a cut-off of a valve opening/closing the gas passage to a user.
  • the present invention relates specifically to a thermocouple assembly of conventional use for the safety of a domestic gas system or the like, of the so called thermocouple-magnet type, including a controlling system such to carry out the on-off or proportional functions.
  • the present invention relates to a thermocouple assembly specifically for the use as safety element in a domestic gas and/or equivalent system interfaced with the gas control valve, in jargon magnet, and having the function of detecting the presence of a flame at the burner. In absence of thermal stress of the thermocouple, the absence of flame is detected and the gas flow to the burner is automatically cut-off.
  • the ignition of a gas burner occurs by pressing the knob combined with the tap controlling the gas flow fed to the burner itself in order to modulate the flame intensity.
  • This pressure manually activates a magnet, i.e. connects the magnet to a power supply source to switch the magnet in different position.
  • the magnet moves a cut-off to an open position of a gas passage to the burner through the valve or tap.
  • the cut-off combined with the magnet is usually biased to the close condition of said passage whereby, in absence of a switching signal by said magnet, the cut-off returns to the position wherein it closes the gas passage, whereas in presence of an electric signal having adequate power, the cut-off is kept in the open position by the magnet, if manually moved to said open position of said gas passage through the tap or valve as long as the electric signal is supplied to the magnet, thus allowing the gas outflow and making the ignition of the burner itself possible.
  • thermocouple provided in interference position with the burner flame is activated by the flame itself of the burner and is able to generate adequate electric power to generate a control signal required to keep the magnet hooked in the open position of the gas passage.
  • the possible flame extinction causes the switching signal to the magnet itself to drop, the thermocouple energy and thus the cut-off displacement to the close condition of the gas passage being missing.
  • thermocouple which values typically are in the range of about 30-40 mV in vacuum
  • current required for the magnet operation which current has to be larger than 110 mA
  • magnet coil resistance typically of 15 mOhm
  • resistance of the thermocouple wires and the cables connecting the latter to the magnet has a big issue related to the voltage values, being generated by the thermocouple, which values typically are in the range of about 30-40 mV in vacuum, to the current required for the magnet operation, which current has to be larger than 110 mA, to the magnet coil resistance typically of 15 mOhm and the resistance of the thermocouple wires and the cables connecting the latter to the magnet.
  • thermocouple-magnet system the need of keeping the circuit resistances low compels thus to use cables having large section typically larger than 1,2 mmq, and to use specific low resistance connections and to restrict the length of the cables connecting the thermocouple itself to the magnet.
  • An increase in the series resistance between the thermoelectric generator of the thermocouple, i.e. the temperature sensor, and the user magnet, causes indeed a progressive degradation of the performance features of the thermocouple-magnet system until a possible failure thereof.
  • thermocouple-magnet system makes interfacing any safety and/or controlling electronic device with the thermocouple-magnet system difficult, despite the use of expensive systems such as switches or relays with golden contacts etc.
  • Thermocouples are known which use mechanical or electromechanical or solid-state circuit breakers, but these breakers are positioned on electronic boards or attached to structural parts of the installation or the structure with whom they are combined, whereby an extension of the thermocouple wires and the presence of electric connections are required, such to drastically worsen the series resistance of the thermocouple largely reducing the performances thereof in terms of time required for the magnet to be hooked. Therefore the solutions adopted in the state of the art do not solve the problem of having trusted safety control of a gas user, such a burner or the like able to ensure wide independence from the electric performances of the temperature sensor with respect to the electric signal generated by the same.
  • a control system for a gas burner or gas hob which is independent of a mains gas supply is disclosed, having a safety valve in a valve body with a spring to open and close the gas inflow selectively.
  • a thermo element is placed near the gas flame to generate a voltage through heat, linked to a magnetic unit to develop a magnetic force and hold the safety valve open.
  • a cut-off switch disconnects the magnetic unit, and the safety valve closes the gas inflow.
  • the cut-off has a timer, independent of a mains supply, to operate energy-saving switches in series or parallel with the thermo element to break or reduce the current through the magnetic unit.
  • the timer is powered through a solar cell, and has a LCD display.
  • Document EP0288390 discloses a security device associated with the valve for supplying fuel gas of the burner of a heating apparatus equipped with a pilot flame, said valve comprising a flap which is capable of being set manually in its opening position, this flap being associated with an electromagnetic coil in such a manner that retention in the open set position of the flap is ensured by circulation in the coil of the electric current generated by the simple heating of a thermocouple by the pilot flame, the required safety being obtained by opening of an electric switch mounted on the circuit which connects the thermocouple to the coil.
  • the electric switch is constituted by a MOS-type transistor which has very low drain-source resistance in the conductive state.
  • Object of the present invention is to provide a thermocouple assembly that on the whole provides a solid-state circuit breaker adapted to drive the operation thereof, and conceived so as to limit the increase of the thermocouple series resistance to the minimum possible.
  • thermocouple assembly can then be used being connected to any application of electronic type, timer, flame controller, cover safety, performance assessment, always when the flame has to be controlled by extinguishing the same or allowing the ignition by series breaker of the thermocouple assembly, and thus of the burner connected thereto.
  • thermocouple assembly according to claim 1.
  • the state of the burner can be controlled based not only on the temperature of the flame presence detector, but also on other parameters that can be a period of preestablished duration of burner operation, the power delivered by the latter or burner operative conditions detected by possibly provided diagnostic systems.
  • the remote drive unit when the remote drive unit generates the solid-state circuit breaker drive signal based on the control signal issued by the thermocouple, different criteria for determining the relevant physical parameter of the control signal generated by the thermocouple for the purpose of configuring the signal to be generated by the external or separated unit can be defined.
  • the signal issued by the temperature sensor in addition to a voltage difference corresponding to a predetermined flame temperature, can also be read depending on the duration or variation of the voltage or power levels and the drive signal for switching the solid-state circuit breaker can be generated depending on these parameters.
  • said at least one conductor connecting the temperature sensor to the thermocouple assembly output is disconnected at the interposition zone of the solid-state circuit breaker, the temperature sensor end of said at least one conductor being connected, at the disconnection point, to a drive input of the solid-state circuit breaker whereas the thermocouple assembly output end is connected at the disconnection and to an output of said solid-state circuit breaker.
  • connection of two ends of said at least one conductor connecting the temperature sensor to the thermocouple to the corresponding contacts of the solid-state circuit breaker are made by welding, or Ohmic equivalent resistance system so as to reduce the connection resistance thereof.
  • the solid-state circuit breaker is housed in a box made of insulating plastic material having a housing for the solid-state circuit breaker and passage openings so that the terminal ends of the two lengths of the conductor connecting the temperature sensor to the thermocouple output and of the conductor or signal supply cable supplying the electromagnetic member/s to the generator of said signal, are inserted inside the box.
  • the box can be provided with a removable cover or alternatively the box can be sealed for example by the use of appropriate resin, which is silicone, epoxy, polyurethane resin or the like.
  • one or more protecting components and/or further controlling components to control the solid-state circuit breaker can be combined with the solid-state circuit breaker itself, which are preferably and possibly housed in the box also housing the said solid-state circuit breaker.
  • the box has on a peripheral side, preferably on the longest side, a couple of hooks spaced apart from one another which each have a U-shaped throat coupling the box by hooking it to a longitudinal cylindrical element, such as a cable and/or gas feed pipe and/or other supports being on the product and able to fix the plastic.
  • the hooking throat is shaped by having, for a certain initial length, a progressive diametric narrowing forming two opposed rounded teeth and extending above the latter with a circular widening having diameter commensurate with the typical diameter of a gas pipe.
  • the narrowing is dimensioned so that the pipe is allowed to be interlockingly engaged in the throat exploiting the intrinsic elasticity of the plastic material of the box and hooks as well of the pipe itself.
  • thermocouple assembly according to the present invention can be applied on all the types of existing thermocouples:
  • a driving cable can be provided to drive the solid-state circuit breaker itself for driving a solid-state circuit breaker switching also by other means, such as for example a manual drive or the like, which drive can operate in parallel and independently from the control signal provided by the temperature sensor and can be directly or indirectly used for controlling the conduction state of the solid-state circuit breaker.
  • thermocouple assembly of the type wherein the least one conductor connecting the temperature sensor to the thermocouple assembly output is disconnected at the interposition zone of the solid- state circuit breaker, and wherein the temperature sensor end of said at least one conductor being connected at the disconnection point to a drive input of the solid-state circuit breaker whereas the thermocouple assembly output end is connected at the disconnection point to an output of said solid-state circuit breaker, wherein the electromagnetic member for opening/closing the valve or the gas feed tap takes the valve or tap to the open condition in the presence of an electric switching signal having predetermined voltage or power values, whereas it takes the valve or tap to the closed condition when said electric switching signal is not present or has value above a certain threshold of predetermined voltage or power threshold values,
  • the two alternatives can also be combined with one another, meaning that the various signals operate in parallel to one another or also meaning that the switching signal generated by the temperature sensor is a signal also enabling the board or drive unit so as to ensure the control by means of other physical parameters only in case of a presence of the flame.
  • one from the following electronic components can be selected: conventional, SCR or MOS transistors.
  • the preferred type is that of the MOS components since it does not require particularly performing performances by the control board or the thermocouple, as far as the voltage and the power of the drive signal are concerned.
  • Object of the invention is also a combination of two or more thermocouple assemblies according to one or more of the afore described exemplary embodiments, each of which is intended for controlling at least one dedicated electromagnetic member of a corresponding valve or a corresponding tap, whereas a common generator of the switching signal is provided for all the thermocouples which provides the switching signal of the electromagnetic members to each solid-state circuit breaker of each thermocouple.
  • Object of the invention is also a gas feed system comprising a combination of two or more thermocouples as above described, wherein several gas users are provided, each of which is connected to a dedicated line of a feeding circuit to feed gas from a gas source, each user being combined with a valve or a tap adjusting the gas flow and having its own electromagnetic member for allowing and cutting-off the gas passage through the valve or tap, each electronic member being connected to a common generator of the switching signal by means of a dedicated solid-state circuit breaker controlled by the signal of a dedicated temperature sensor.
  • thermocouple assembly of the system according to the two described embodiment variations can comprise one or more of the afore listed characteristics for said thermocouple assembly.
  • Object of the invention is also a method for controlling a safety valve or tap feeding a gas, which valve or tap comprise an electromagnetic member for allowing and cutting-off the gas passage through the valve or tap, which electromagnetic member is supplied by a signal depending on the temperature detected by a temperature sensor operating in accordance with the thermoelectric effect, the method providing the following steps:
  • thermocouple of the double-wire type there is shown a thermocouple of the double-wire type according to the state of the art.
  • the invention can be applied to all the different types of thermocouples, therefore in case of figure 1 it is an example that has not to be interpreted as limiting, translating the concepts described for the double-wire thermocouple type and other thermocouple types being within the skills of an average skilled person.
  • thermocouple assembly of figure 1 comprises a temperature sensor being made according to the known art and having a temperature sensitive area corresponding to the joint area of two different metals.
  • the thermoelectric effect involves an electromotive force, i.e. an electric signal with a certain voltage and a certain power depending on the temperature the sensor is subjected to and its physical size, being generated at the ends of the conductors forming the joint between them.
  • the temperature sensor 1 is connected through each of the two different metal elements to a wire 2, 2' transmitting the signal generated by the temperature sensor 1 to a connector 3.
  • the connector is made so as to cooperate with the input contacts of the switching signal of an electromagnet driving a safety cut-off of a valve or a tap for feeding gas.
  • thermocouple An example of implementation of a thermocouple is described in the document WO2013021341 .
  • the switching signal of the electromagnet driving the cut-off cutting-off or allowing the gas passage to the burner depending on the presence or not of a flame is the signal produced by the temperature sensor under thermal stress condition.
  • This electric signal is not constant as for its voltage and power, and requires different expedients as already pointed out in the introduction.
  • FIG. 2 shows a thermocouple according to the present invention.
  • a solid-state circuit breaker is interposed which is housed in a box 4 and which, as it will be evident with reference to the following figures 3 ad 4, is inserted between two sections of the wire 2 that is separated in two lengths of which one 102 is connected to the temperature sensor 1 and the other length 202 is connected to the connector 3 and from this to the electromagnetic member intercepting the gas.
  • the solid-state circuit breaker is preferably of the MOS type.
  • MOS metal-oxide-semiconductor
  • conventional transistors or SCR components or the like can be used and the selection depends on the performances of the temperature sensor 1 based on the generated signal, i.e. on the voltage and/or power of this signal.
  • the solid-state circuit breaker has three contacts one of which makes up the input of the drive signal of the solid-state circuit breaker for switching the latter from a closed condition of the connection between an input of the signal and an output of the signal switching the electromagnet.
  • Such a signal is generated continuously and has such voltage and power to ensure the proper switching of the electromagnet in order for a cut-off of the gas passageway to be moved and kept retained in the open position.
  • the length 202 of the wire 2 connected to the connector 3 is connected to the contact 305 of the solid-state circuit breaker 5, whereby in presence of an electric signal supplied to the drive input 105 by a drive board depending on the physical quantity to be controlled or by the temperature sensor, this signal is only used to drive the solid-state circuit breaker to the condition in which the latter connects the input of the signal 205, to which the conductor 9 connected to the generator of the switching signal of the electromagnet is connected, to the output 305 to which the connector 3 and thus the electromagnet are connected through the length 202 of wire 2.
  • a protecting component 6 can be interposed between the inputs 105 and 205 in the circuit, as it is usual in this type of circuits.
  • the protecting component is for example a diode.
  • the box shown in detail in figures 3 and 4 is of the type comprising a removable cover 104 which can be interlockingly fitted or in other way but however still removably attached, to the base 204 of the box.
  • the box is preferably made of plastic material and has inputs for the conductors 102, 202 and 9.
  • two extensions 304 are provided as spaced apart substantially correspondingly to the length of the side of the box 4, for hooking the box to an elongated member, as a cable or a gas pipe.
  • said extensions 304 have an overturned-U-shaped hooking seat having an initial length narrowing like a V-shape towards two opposed projections 404 delimiting the v-shaped length from a circular seat having a diameter substantially corresponding to, or slightly larger than, the diameter of the pipe to which the box is intended to be hooked.
  • the two opposed projections in the form of rounded corners narrow an input area to the circular recess 504 having a diameter larger than said narrowing.
  • This narrowing is such with respect to the diameter of the pipe or other elongated member provided for the hooking, whereby thanks to the material of the two fins being of plastic material and also to the pipe characteristics, the same can be forced into the throat and beyond the two opposed recesses 304 so as to be interlockingly engaged within the innermost circular part of the throat.
  • the whole may be calibrated such that the hooking, and the release as well, can be made easy, still effectively retaining the box on the corresponding pipe.
  • hooking means it is one out of multiple examples which are known and can be alternatively used based on pure choices for opportunity made by the field technician.
  • wires 102, 202, and 9 are directly welded on the connection ends of the solid-state circuit breaker denoted by 105, 205, 305.
  • Figure 5 shows an implementation example wherein, as occurs for example in cookers provided with several burners, a thermocouple for detecting the presence of the flame has to be combined with each burner.
  • thermocouple in order to switching the electromagnet combined with each thermocouple, a single control unit is provided generating a switching signal of the magnet which can be used by each one of the said thermocouples denoted by 10.
  • thermocouple coupling with the thermocouple has significant advantages thanks to its consistency and flexibility of use and in that it can be supported in any point by a pipe or elongated member.
  • Embodiment variations can provide the box with the solid-state circuit breaker being arranged not in median position between the temperature sensor 1 and the connector 3, but in an eccentric position.

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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)

Claims (15)

  1. Ensemble thermocouple comprenant un capteur de température (1) fonctionnant en accord avec l'effet thermoélectrique, ledit ensemble thermocouple présentant une sortie (3) pour contrôler directement ou indirectement un élément électromagnétique entraînant un obturateur d'une vanne ouvrant/fermant un passage de gaz vers un utilisateur, laquelle sortie (3) est connectée au capteur de température (1) à travers au moins un conducteur,
    étant caractérisée en ce que ledit ensemble thermocouple comprend en outre une unité de commande (8), un disjoncteur à semi-conducteurs (5) et une unité d'entraînement,
    l'unité de commande (8) comprenant un générateur d'un signal de commutation pour faire passer ledit élément électromagnétique à la condition ouverte pour le passage du gaz vers l'utilisateur,
    le disjoncteur à semi-conducteurs (5) connectant ledit générateur à l'élément électromagnétique d'entraînement à travers la sortie (3) du thermocouple en contrôlant la condition de conduction ou d'isolation dudit disjoncteur à semi-conducteurs au moyen d'un signal généré par:
    l'unité d'entraînement en fonction d'au moins une valeur physique à contrôler, parmi laquelle la température, le temps, la puissance, la position;
    ou
    par un capteur de température (1) qui est solidaire avec l'ensemble thermocouple, et dans lequel ledit disjoncteur à semi-conducteurs (5) est monté directement sur ledit au moins un conducteur connectant le capteur de température (1) à la sortie (3) du thermocouple.
  2. Ensemble thermocouple selon la revendication 1, dans lequel ledit au moins un conducteur connectant le capteur de température (1) à la sortie (3) de l'ensemble thermocouple est déconnecté en correspondance de la zone d'interposition du disjoncteur à semi-conducteurs (5), l'extrémité du capteur de température dudit au moins un conducteur étant connectée en correspondance du point de déconnexion à une unité d'entraînement du disjoncteur à semi-conducteurs (5), tandis que l'extrémité de sortie de l'ensemble thermocouple est connectée en correspondance du point de déconnexion à une sortie dudit disjoncteur à semi-conducteurs (5).
  3. Ensemble thermocouple selon la revendication 2, caractérisé en ce que la connexion des deux extrémités dudit au moins un conducteur aux contacts du disjoncteur à semi-conducteurs correspondant est réalisée par soudage ou par un système ohmique de résistance équivalent.
  4. Ensemble thermocouple selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que le disjoncteur à semi-conducteurs (5) est logé dans un boîtier (4) réalisé en matière plastique isolante, ledit boîtier (4) présentant des ouvertures de passage pour que les extrémités terminales des deux conducteurs connectant le capteur de température (1) à la sortie (3) du thermocouple et d'un conducteur (9) pour transférer le signal de commutation de l'unité de commande (8) vers l'élément électromagnétique soient insérées à l'intérieur du boîtier (4).
  5. Ensemble thermocouple selon la revendication 4, dans lequel le boîtier (4) est alternativement muni d'un couvercle amovible ou le boîtier est scellé, par exemple en utilisant une résine appropriée, telle que une résine de silicone, d'époxy, de polyuréthane ou similaire.
  6. Ensemble thermocouple selon l'une ou plusieurs des revendications précédentes, dans lequel au moins un composant de protection (6) et/ou autres composants de contrôle pour contrôler le disjoncteur à semi-conducteurs est/sont connecté(s) au disjoncteur à semi-conducteur (5) lui-même et est/sont de préférence et éventuellement logé(s) dans le boîtier (4) logeant également ledit disjoncteur à semi-conducteurs (5).
  7. Ensemble thermocouple selon l'une ou plusieurs des revendications 4 à 6, dans lequel le boîtier (4) présente, sur un côté périphérique, de préférence le plus long, une paire de crochets (304) espacés entre eux, chaque crochet présentant un gorge d'accrochage (504) en forme de U couplant le boîtier (4) en l'accrochant à un élément cylindrique longitudinal, tel qu'un câble et/ou un tuyau d'alimentation en gaz ou des systèmes équivalents qui permettent de positionner différemment le dessus du brûleur à gaz.
  8. Ensemble thermocouple selon la revendication 7, dans lequel la gorge d'accrochage (504) est façonnée et présente, sur une certaine longueur initiale, un rétrécissement diamétral progressif formant deux dents arrondies opposées (404) et s'étend au-dessus de ces dernières, avec un élargissement circulaire présentant un diamètre proportionné au diamètre typique d'un tuyau à gaz, le rétrécissement étant dimensionné de sorte que le tuyau puisse s'engager par enclenchement dans la gorge (504), exploitant donc l'élasticité intrinsèque de la matière plastique du boîtier, des crochets et du tuyau lui-même.
  9. Ensemble thermocouple selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que le thermocouple est réalisé selon l'un des types suivants:
    - de type monofilaire, avec un seul fil de connexion pour connecter le capteur de température à la sortie du thermocouple, la masse du produit lui-même étant le second fil de connexion;
    - de type bifilaire, avec deux fils de connexion entre le capteur de température et la sortie du thermocouple desdits deux fils;
    - de type tubulaire, dans lequel la masse est un tuyau protégeant mécaniquement et/ou thermiquement le fil intérieur.
  10. Ensemble thermocouple selon l'une ou plusieurs des revendications précédentes, dans lequel est prévu un câble d'entraînement pour entraîner le disjoncteur lui-même pour entraîner une commutation du disjoncteur par différents moyens, tels que par exemple un entraînement manuel, lequel entraînement peut être actionné en parallèle et indépendamment du signal fourni par le capteur de température pour entraîner le disjoncteur en fonction de la température détectée de la flamme.
  11. Ensemble thermocouple selon la revendication 2 ou selon l'une ou plusieurs des revendications précédentes dépendantes de la revendication 2,
    caractérisé en ce qu'il comprend en outre l'élément électromagnétique et la vanne ou un robinet d'alimentation en gaz, dans lequel
    l'élément électromagnétique ouvrant/fermant la vanne ou le robinet d'alimentation en gaz (R) amène la vanne ou le robinet dans la condition ouverte en présence d'un signal de commutation électrique présentant des valeurs de tension ou de puissance prédéterminées, tandis qu'il amène la vanne ou le robinet d'alimentation en gaz dans la condition fermée lorsque ledit signal de commutation électrique n'est pas présent ou présente des valeurs différentes au-dessus d'un certain seuil de valeurs seuils de tension ou de puissance prédéterminées,
    ledit disjoncteur à semi-conducteurs (5) étant configuré pour être commuté en fonction des valeurs de tension ou de puissance du signal généré par le capteur de température;
    le signal de commutation dudit générateur étant fourni à une entrée (205) de disjoncteur à semi-conducteurs, dans lequel le signal de commutation fourni par le générateur actionne le disjoncteur à semi-conducteurs (5) en correspondance de l'entrée de l'élément électromagnétique lorsque le signal généré par le capteur de température (1) fait passer le disjoncteur à semi-conducteurs (5) dans la condition de conduction entre l'entrée et la sortie.
  12. Ensemble thermocouple selon l'une quelconque des revendications précédentes, dans lequel le disjoncteur à semi-conducteurs (5) est sélectionné par l'un des composants électroniques suivants: transistors conventionnels, SCR ou MOS de différents types.
  13. Combinaison de deux ou plusieurs ensembles thermocouple selon l'une ou plusieurs des revendications précédentes, chacun desquels étant destiné à contrôler au moins un élément électromagnétique dédié d'une vanne ou d'un robinet (R) correspondant(e), caractérisée en ce qu'un générateur commun (8) du signal de commutation est prévu pour tous les thermocouples (10) qui fournit le signal d'alimentation des éléments électromagnétiques à chaque disjoncteur à semi-conducteurs (5) de chaque thermocouple.
  14. Système d'alimentation en gaz comprenant une combinaison selon la revendication 13, dans lequel plusieurs utilisateurs de gaz sont prévus, chacun desquels est connecté à une ligne spécifique d'un circuit d'alimentation en gaz pour alimenter en gaz à partir d'une source de gaz, chaque utilisateur étant associé à une vanne ou à un robinet réglant le flux de gaz et possédant son propre élément électromagnétique pour permettre et couper le passage du gaz à travers la vanne ou le robinet, chaque élément électronique étant connecté à un générateur commun (8) du signal de commutation au moyen d'un disjoncteur à semi-conducteur (5) dédié contrôlé par le signal d'un capteur de température (10) dédié.
  15. Méthode de contrôle d'une vanne ou d'un robinet de sécurité alimentant un gaz, laquelle vanne ou lequel robinet (R) comprend un élément électromagnétique pour permettre ou couper le passage du gaz à travers la vanne ou le robinet, lequel élément magnétique est alimenté par un signal en fonction de la température détectée par un capteur de température (1) fonctionnant en accord avec l'effet thermoélectrique, la méthode prévoyant les étapes suivantes:
    - générer un signal de commutation de l'élément électromagnétique à travers un générateur, le signal de commutation étant adapté pour déterminer le passage de la vanne ou du robinet de sécurité à la condition de passage autorisé du flux de gaz à travers la vanne ou le robinet et étant fourni en continu;
    - permettre la transmission dudit signal de commutation à l'élément électromagnétique en fonction du signal électrique généré par le capteur de température (10) de sorte que, en fonction de la valeur de tension ou de puissance dudit signal du capteur de température,
    un disjoncteur à semi-conducteurs (5) soit interposé entre la sortie du générateur et l'entrée pour ledit signal de commutation de l'élément électromagnétique soit commutée à la condition ouverte ou fermée,
    ou
    permettre la transmission dudit signal de commutation à l'élément électromagnétique de sorte que, en fonction d'un signal correspondant à une grandeur physique différente et traité par une unité d'entraînement, le disjoncteur à semi-conducteurs (5) soit interposé entre la sortie du générateur et l'entrée pour ledit signal de commutation de l'élément électromagnétique soit commuté à la condition ouverte ou fermée.
EP18714840.8A 2017-03-13 2018-03-08 Thermocouple d'entraînement d'éléments de commande d'alimentation en gaz, système de commande d'alimentation en gaz et procédé de commande d'éléments de commande d'alimentation en gaz Active EP3596392B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000027214A IT201700027214A1 (it) 2017-03-13 2017-03-13 Termocoppia di commando di organi di controllo dell’alimentazione di gas, sistema di controllo dell’alimentazione di gas e metodo per il controllo degli organi di controllo dell’alimentazione di gas
PCT/IB2018/051506 WO2018167614A1 (fr) 2017-03-13 2018-03-08 Thermocouple d'entraînement d'éléments de commande d'alimentation en gaz, système de commande d'alimentation en gaz et procédé de commande d'éléments de commande d'alimentation en gaz

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EP3596392A1 EP3596392A1 (fr) 2020-01-22
EP3596392C0 EP3596392C0 (fr) 2024-07-24
EP3596392B1 true EP3596392B1 (fr) 2024-07-24

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EP (1) EP3596392B1 (fr)
BR (1) BR112019018545A2 (fr)
IT (1) IT201700027214A1 (fr)
WO (1) WO2018167614A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022194550A1 (fr) * 2021-03-18 2022-09-22 BSH Hausgeräte GmbH Cuisinière à gaz

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0288390A1 (fr) * 1987-04-24 1988-10-26 Chaffoteaux & Maury Perfectionnements aux dispositifs de sécurité pour vannes à gaz

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6805136A (fr) * 1967-04-15 1968-10-16
JPS602567B2 (ja) * 1980-08-05 1985-01-22 リンナイ株式会社 ガス燃焼器の燃焼制御装置
EP1564487A2 (fr) * 2004-02-11 2005-08-17 Diehl AKO Stiftung & Co. KG Dispositif de commande pour un brûleur à gaz indépendant du réseau

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0288390A1 (fr) * 1987-04-24 1988-10-26 Chaffoteaux & Maury Perfectionnements aux dispositifs de sécurité pour vannes à gaz

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EP3596392A1 (fr) 2020-01-22
EP3596392C0 (fr) 2024-07-24
IT201700027214A1 (it) 2018-09-13
WO2018167614A1 (fr) 2018-09-20
BR112019018545A2 (pt) 2020-04-14

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