EP0135639B1 - Apparatus for improving the operational characteristics of a heating appliance with submerged combustion - Google Patents

Apparatus for improving the operational characteristics of a heating appliance with submerged combustion Download PDF

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Publication number
EP0135639B1
EP0135639B1 EP19830401863 EP83401863A EP0135639B1 EP 0135639 B1 EP0135639 B1 EP 0135639B1 EP 19830401863 EP19830401863 EP 19830401863 EP 83401863 A EP83401863 A EP 83401863A EP 0135639 B1 EP0135639 B1 EP 0135639B1
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EP
European Patent Office
Prior art keywords
plant
installation
air
burner
ignition
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EP19830401863
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German (de)
French (fr)
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EP0135639A1 (en
Inventor
Francois Laurent
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Individual
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Individual
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Priority to DE8383401863T priority Critical patent/DE3379592D1/en
Priority to EP19830401863 priority patent/EP0135639B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/004—Combustion apparatus characterised by the shape of the combustion chamber the chamber being arranged for submerged combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00—Safety arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/107—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using fluid fuel

Definitions

  • the present invention relates to an installation making it possible to improve the operating characteristics of a heating installation of the submerged combustion type.
  • the combustion chamber having a relatively high thermal inertia, and being able to be brought during combustion to temperatures close to 1000 ° C., difficulties appear between each operating cycle as a result of the water rising into the chamber combustion still hot after post-sweeping, leading to significant thermal stresses in the chamber capable of causing cracks and rising steam and humid air throughout the installation which could disturb the proper functioning of the electrical components, in particular of ignition.
  • the object of the invention is to avoid the above-mentioned drawbacks.
  • the installation according to the invention which is of the type comprising at least one burner with submerged combustion chamber, a fuel supply, a supply of combustion air pressurized by a fan or the like and controlled as soon as the system is switched on by means of an on / off button, an automatic ignition device with spark plugs or the like, a programmer successively controlling at appropriate times consecutive to an air sweep of the installation, the fuel supply, ignition of the burner and stop of the fuel supply, is characterized in that the fan is supplied directly by the system's power-up circuit and is controlled by means of a delayed opening relay itself supplied by said power-on circuit through the on / off button of the installation and in that it comprises, in parallel with the supply of combustion air to the burner, a circuit of bypass which blows air on the spark plugs or the like and which is controlled by a solenoid valve from a delayed closing relay energized by the programmer and whose timing corresponds substantially to the sweep time at air from the installation prior to the arrival of fuel and ignition of the burner.
  • combustion air may be permanently maintained in the installation and, when the latter is stopped, for example at the end of the day, or even one or more times during the day, the time-delayed relay will maintain circulation in the installation. Combustion air long enough to ensure proper cooling of the chamber.
  • dry combustion air will be blown out. the spark plug electrodes, eliminating all traces of humidity from these electrodes, thus ensuring a trouble-free start of the cycle.
  • the installation comprises a burner 1, of the jet or other type which develops a vertical flame 2 directed downwards in a hearth 3 constituting the combustion chamber whose wall is usually metallic made up of one or more layers.
  • the products or gases of combustion escape in the form of bubbles 4 through holes 5 formed at the bottom of the chamber 3 directly in the bath to be heated 30, usually consisting of water contained in a suitable container or enclosure 31 and below level 15 of the bath.
  • the operating cycle (ignition and extinction) of the burner is controlled by an approved programmer 6 which must meet precise specifications defined by the Public authorities.
  • This programmer 6 gives orders to the motor 7 of a combustion air fan, checks the presence of the suitable air pressure measured in 8 and the suitable gas pressure measured in 9 and sends an ignition order by l 'through a high voltage transformer 10 to a spark plug 11; the programmer also gives orders to the air 12 and gas 13 solenoid valves and checks the presence of the flame by a detection member 14.
  • the programmer pre-scans the installation, i.e. scans the entire combustion chamber 3 with air only, with the air pressure in front be greater than the hydrostatic pressure of the liquid contained in the bath 30. This pre-sweep time is of the order of a minute. Then, if the air and gas pressures are suitable, the programmer 6 controls the supply of the ignition transformer 10 and the burner ignites.
  • the programmer 6 closes the solenoid valve 13 of the fuel and proceeds to a post-scan, that is to say a post ventilation of the equipment while continuing to send air through the fan 7 throughout the installation for a time of the order of 30 seconds.
  • FIG. 2 showing the modified installation in accordance with the invention and in which the same references have been used to identify identical parts.
  • the starting of the fan motor 7 is no longer controlled by the junction 27 coming from the programmer 6, but directly by a junction 21 connected to the current supply line of the installation, it even controlled by a relay 19, the contact 18 of which is timed on opening, the relay 19 itself being supplied through the on / off button 20 of the installation.
  • the motor 7 will remain supplied by line 21 for the time of the time delay of the contact 18 and will ensure the necessary cooling of the wall of the combustion chamber 3.
  • the time delay will be sufficient to ensure that the temperature of the internal wall of the chamber 3 will not be substantially greater than 100 ° C; with conventional power installations, this duration of tem porization can be of the order of 8 to 10 minutes approximately.
  • the electrodes 17 of the spark plug 11 will be blown into the air through a tube 22 supplied by means of a solenoid valve 23 in bypass on the main air supply circuit 29 of the fan.
  • the solenoid valve 23 is supplied from junction 27 of the programmer which was initially used to control the start-up of the fan in pre and post-sweeps.
  • the supply of the solenoid valve 23 is also done through the contact 24 of a relay 25 supplied by the junction 27 and delayed on closing.
  • the time delay may be approximately 30 seconds, corresponding to the pre-sweep time.

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

Description

La présente invention concerne une installation permettant d'améliorer les caractéristiques de fonctionnement d'une installation de chauffage du type à combustion submergée.The present invention relates to an installation making it possible to improve the operating characteristics of a heating installation of the submerged combustion type.

Pour diverses applications, notamment de chauffage industriel, de chauffage de piscines et autres, on utilise parfois des installations utilisant des brûleurs à combustion submergée.For various applications, in particular industrial heating, swimming pool heating and others, installations using submerged combustion burners are sometimes used.

L'intérêt de telles installations est que l'on récupère, du fait du barbotage des gaz de combustion dans l'eau à chauffer, la plus grande partie de la chaleur latente de condensation des fumées. Ceci permet d'obtenir des rendements calculés sur le pouvoir calorifique inférieur (PCI) supérieur à 100% et fréquemment de l'ordre de 105%.The advantage of such installations is that, due to the bubbling of the combustion gases in the water to be heated, most of the latent heat of condensation of the fumes is recovered. This makes it possible to obtain yields calculated on the lower calorific value (PCI) greater than 100% and frequently of the order of 105%.

Cette technique séduisante présente cependant un certain nombre de difficultés inhérentes au principe même de la combustion qui s'effectue en milieu submergé. L'installation doit utiliser une arrivée de combustible (gaz ou fuel par exemple), une arrivée d'air comburant pressurisé par un ventilateur ou analogue, un dispositif d'allumage automatique à bougie ou analogue et un programmateur qui commandera successivement et automatiquement aux moments opportuns l'arrivée de combustible, l'allumage des brûleurs et l'arrêt d'alimentation de combustible lorsque la température de fonctionnement désirée aura été atteinte. Les brûleurs fonctionnant dans une chambre de combustion close, submergée, il est nécessaire pour des questions de sécurité et afin d'éviter tout risque d'explosion de réaliser avant allumage et après extinction des brûleurs respectivement un pré-balayage et un post-balayage à l'air de la chambre. Ces cycles sont pris en charge par le programmateur.This attractive technique however presents a certain number of difficulties inherent in the very principle of combustion which takes place in a submerged environment. The installation must use a fuel supply (gas or fuel for example), a supply of combustion air pressurized by a fan or the like, an automatic spark-ignition device or the like and a programmer which will control successively and automatically at times the fuel supply, the ignition of the burners and the fuel supply stop when the desired operating temperature has been reached. Burners operating in a closed, submerged combustion chamber, it is necessary for safety reasons and in order to avoid any risk of explosion to carry out before ignition and after extinction of the burners respectively a pre-sweep and a post-sweep with the air of the room. These cycles are taken care of by the programmer.

Cependant, la chambre de combustion ayant une inertie thermique relativement importante, et pouvant être portée lors de la combustion à des températures voisines de 1000°C, il apparaît des difficultés entre chaque cycle de fonctionnement par suite de remontées de l'eau dans la chambre de combustion encore chaude après post-balayage, conduisant à des contraintes thermiques importantes de la chambre susceptibles d'engendrer des fissures et des remontées de vapeur et d'air humide dans toute l'installation pouvant perturber le bon fonctionnement des organes électriques notamment d'allumage.However, the combustion chamber having a relatively high thermal inertia, and being able to be brought during combustion to temperatures close to 1000 ° C., difficulties appear between each operating cycle as a result of the water rising into the chamber combustion still hot after post-sweeping, leading to significant thermal stresses in the chamber capable of causing cracks and rising steam and humid air throughout the installation which could disturb the proper functioning of the electrical components, in particular of ignition.

Au brevet US-A-2 118 479 est décrite une installation de chauffage à combustion submergée fonctionnant de façon qu'une ventilation à l'air de cette installation soit maintenue en permanence dès que cette dernière est sous tension et tant que son arrêt général n'est pas commandé. Toutefois, il n'est pas prévu de poursuivre la ventilation en particulier de la chambre de combution après l'arrêt général, ce qui laisse entier le problème des remontées rapides de liquide dans la chambre de combustion encore chaude.In patent US-A-2 118 479 there is described a submerged combustion heating installation operating in such a way that air ventilation of this installation is permanently maintained as soon as the latter is energized and as long as its general shutdown n is not ordered. However, it is not planned to continue the ventilation, in particular of the combustion chamber after the general shutdown, which leaves the problem of rapid rises of liquid in the combustion chamber still hot.

Un autre problème délicat à résoudre est celui d'un allumage correct des brûleurs quelles que soient les conditions de fonctionnement de l'installation; les remontées de vapeurs et d'air humide dans la chambre de combustion nuisant en effet à la sureté de l'allumage.Another delicate problem to be solved is that of a correct ignition of the burners whatever the operating conditions of the installation; the rise of vapors and humid air in the combustion chamber, which in fact adversely affects the safety of the ignition.

Au brevet FR-A-1 503 119 est présenté un appareil de chauffage du type à combustion submergée dans lequel on souffle de l'air sur les bougies d'allumage afin de mettre celles-ci rapidement en état de fonctionner correctement. Cependant les moyens utilisés sont délicats à mettre en oeuvre et à utiliser, le soufflage d'air sur les bougies étant assuré directement par tout l'air comburant alimentant le brûleur pilote.In the patent FR-A-1 503 119 is presented a heating device of the submerged combustion type in which air is blown on the spark plugs in order to quickly put them in a state of functioning properly. However, the means used are delicate to implement and to use, the air blowing on the spark plugs being provided directly by all the combustion air supplying the pilot burner.

L'invention à pour objet d'éviter les inconvénients sus-mentionnés.The object of the invention is to avoid the above-mentioned drawbacks.

A cet effet, l'installatiôn conforme à l'invention qui est du type comportant au moins un brûleur à chambre de combustion submergée, une arrivée de combustible, une arrivée d'air comburant préssurisé par un ventilateur ou analogue et commandée dès que l'installation est mise sous tension par l'intermédiaire d'un bouton marche/arrêt, un dispositif d'allumage automatique à bougies ou analogues, un programmateur commandant successivement aux moments opportuns consécutifs à un balayage à l'air de l'installation, l'arrivée de combustible, l'allumage du brûleur et l'arrêt de l'alimentation de combustible, se caractérise en ce que le ventilateur est alimenté directement par le circuit de mise sous tension de l'installation et est commandé par l'intermédiaire d'un relais à ouverture temporisée lui-même alimenté par ledit circuit de mise sous tension à travers le bouton marche/arrêt de l'installation et en ce qu'elle comprend, en parallèle sur l'arrivée d'air comburant au brûleur, un circuit de dérivation qui souffle de l'air sur les bougies d'allumage ou analogues et qui est commandé par une électrovanne à partir d'un relais à fermeture temporisée mis sous tension par le programmateur et dont la temporisation correspond sensiblement au temps de balayage à l'air de l'installation préalable à l'arrivée de combustible et à l'allumage du brûleur.To this end, the installation according to the invention which is of the type comprising at least one burner with submerged combustion chamber, a fuel supply, a supply of combustion air pressurized by a fan or the like and controlled as soon as the system is switched on by means of an on / off button, an automatic ignition device with spark plugs or the like, a programmer successively controlling at appropriate times consecutive to an air sweep of the installation, the fuel supply, ignition of the burner and stop of the fuel supply, is characterized in that the fan is supplied directly by the system's power-up circuit and is controlled by means of a delayed opening relay itself supplied by said power-on circuit through the on / off button of the installation and in that it comprises, in parallel with the supply of combustion air to the burner, a circuit of bypass which blows air on the spark plugs or the like and which is controlled by a solenoid valve from a delayed closing relay energized by the programmer and whose timing corresponds substantially to the sweep time at air from the installation prior to the arrival of fuel and ignition of the burner.

Ainsi, on va pouvoir éviter radicalement le problème des contraintes dues à un refroidissement brutal par remontée d'eau dans la chambre de con "Justion et la production simultanée de vapeur d eau néfaste au bon fonctionnement. En outre, la circulation d'air comburant pourra être maintenue en permanence dans l'installation et, lorsqu'on arrêtera cette dernière, par exemple en fin de journée, ou encore une ou plusieurs fois en cours de journée, le relais à ouverture temporisé maintiendra dans l'installation la circulation d'air comburant suffisamment longtemps pour assurer le bon refroidissement de la chambre. De plus à la mise en route de chaque cycle d'allumage, avant que l'allumage soit commandé par mise sous tension des bougies, de l'air sec comburant sera soufflé sur les électrodes de la bougie, éliminant de ces électrodes toute trace d'humidité, assurant ainsi un démarrage sans problème du cycle.Thus, we will be able to radically avoid the problem of stresses due to sudden cooling by rising water in the combustion chamber and the simultaneous production of water vapor detrimental to the proper functioning. In addition, the circulation of combustion air may be permanently maintained in the installation and, when the latter is stopped, for example at the end of the day, or even one or more times during the day, the time-delayed relay will maintain circulation in the installation. Combustion air long enough to ensure proper cooling of the chamber. In addition, at the start of each ignition cycle, before ignition is controlled by switching on the spark plugs, dry combustion air will be blown out. the spark plug electrodes, eliminating all traces of humidity from these electrodes, thus ensuring a trouble-free start of the cycle.

L'invention apparaîtra plus clairement à l'aide de description qui va suivre faite en référence aux dessins annexés dans lesquels:

  • - la figure 1 montre un schéma d'une installation classique à combustion submergée;
  • - la figure 2 montre un schéma de la même installation mais comportant les modifications objets de perfectionnements de l'invention.
The invention will appear more clearly with the aid of the description which follows, made with reference to the appended drawings in which:
  • - Figure 1 shows a diagram of a conventional submerged combustion installation;
  • - Figure 2 shows a diagram of the same installation but comprising the modifications subject to improvements of the invention.

On décrira tout d'abord une installation classique telle qu'elle se présente comme illustrée à la figure 1.Firstly, a conventional installation will be described as it appears as illustrated in FIG. 1.

L'installation comprend un brûleur 1, du type jet ou autre qui développe une flamme 2 verticale dirigée vers le bas dans un foyer 3 constituant la chambre de combustion dont la paroi est habituellement métallique constituée d'une ou plusieurs couches. Les produits ou gaz de la combustion s'échappent sous forme de bulles 4 par des trous 5 formés en bas de la chambre 3 directement dans le bain à chauffer 30, habituellement constitué par de l'eau contenue dans un récipient ou une enceinte convenable 31 et en dessous du niveau 15 du bain.The installation comprises a burner 1, of the jet or other type which develops a vertical flame 2 directed downwards in a hearth 3 constituting the combustion chamber whose wall is usually metallic made up of one or more layers. The products or gases of combustion escape in the form of bubbles 4 through holes 5 formed at the bottom of the chamber 3 directly in the bath to be heated 30, usually consisting of water contained in a suitable container or enclosure 31 and below level 15 of the bath.

Le cycle de fonctionnement (allumage et extinction) du brûleur est commandé par un programmateur 6 agréé devant répondre à des spécifications précises définies par les Pouvoirs Publics. Ce programmateur 6 donne des ordres au moteur 7 d'un ventilateur d'air comburant, vérifie la présence de la pression d'air convenable mesurée en 8 et de la pression de gaz convenable mesurée en 9 et envoie un ordre d'allumage par l'intermédiaire d'un transformateur haute tension 10 à une bougie d'allumage 11; le programmateur donne également des ordres aux électrovannes d'air 12 et de gaz 13 et vérifie la présence de la flamme par un organe de détection 14.The operating cycle (ignition and extinction) of the burner is controlled by an approved programmer 6 which must meet precise specifications defined by the Public Authorities. This programmer 6 gives orders to the motor 7 of a combustion air fan, checks the presence of the suitable air pressure measured in 8 and the suitable gas pressure measured in 9 and sends an ignition order by l 'through a high voltage transformer 10 to a spark plug 11; the programmer also gives orders to the air 12 and gas 13 solenoid valves and checks the presence of the flame by a detection member 14.

Au début du cycle, le programmateur procède à un pré-balayage de l'installation, c'est-à-dire au balayage par l'air uniquement de l'ensemble de la chambre de combustion 3, la pression de l'air devant être supérieure à la pression hydrostatique du liquide contenu dans le bain 30. Ce temps de pré-balayage est de l'ordre de la minute. Ensuite, si les pressions d'air et de gaz sont convenables, le programmateur 6 commande l'alimentation du transformateur d'allumage 10 et le brûleur s'allume.At the start of the cycle, the programmer pre-scans the installation, i.e. scans the entire combustion chamber 3 with air only, with the air pressure in front be greater than the hydrostatic pressure of the liquid contained in the bath 30. This pre-sweep time is of the order of a minute. Then, if the air and gas pressures are suitable, the programmer 6 controls the supply of the ignition transformer 10 and the burner ignites.

En fin de cycle, c'est-à-dire lorsque le bain 30 a atteint la température désirée, le programmateur 6 ferme l'élextrovanne 13 du combustible et procède à un post-balayage, c'est-à-dire à une post-ventilation de l'équipement en continuant à envoyer de l'air par le ventilateur 7 dans l'ensemble de l'installation pendant un temps de l'ordre de 30 secondes.At the end of the cycle, that is to say when the bath 30 has reached the desired temperature, the programmer 6 closes the solenoid valve 13 of the fuel and proceeds to a post-scan, that is to say a post ventilation of the equipment while continuing to send air through the fan 7 throughout the installation for a time of the order of 30 seconds.

Cette façon de faire, si elle est conforme aux spécifications en vigueur dans la plupart des pays et valable pour des chaudières, présente pour l'utilisation spécifique du chauffage en direct par des produits de combustion les inconvénients suivants:

  • - lors de l'arrêt de l'installation, le liquide du bain 30 remonte trop rapidement à l'intérieur de la chambre 3. Le métal porté sur sa face interne à une température de l'ordre de 1000 °C est brutalement refroidi, ce qui crée des contraintes thermiques importantes et détériore ses qualités pouvant entraîner des fissures. De plus, cela provoque une vaporisation du liquide créant une tension de vapeur qui chemine jusqu'aux électrovannes d'air 12 et de gaz 13 et aux membranes de prise de pression 8 et 9. Cette pression de vapeur risque également d'atteindre le ventilateur 7. La vapeur qui est à une température supérieure à 100°C détériore ainsi les organes précédemment cités qui sont la plupart du temps conçus pour des températures de fonctionnement ne dépassant pas 50°C et qui s'accommodent mal d'une humidité importante.
  • - lors de la régulation de l'installation, c'est-à-dire lors de l'arrêt momentané entre deux cycles de fonctionnement de l'installation lorsque le bain n'a pas besoin de chaleur (l'installation fonctionnant par tout ou rien) les problèmes sont identiques, puisque le programmateur procède au post-balayage comme indiqué ci-dessus et attend un ordre de la sonde de température pour commander un autre démarrage. Autrement dit, entre deux cycles de fonctionnement successifs, on retrouve les inconvénients susmentionnés existant à la suite de la mise à l'arrêt de l'installation.
  • -l'allumage est incertain, car l'installation étant à l'arrêt définitif en fin de travail, une atmosphère humide règne dans l'enceinte 16 de la partie supérieure de la chambre 3, et les électrodes 17 de la bougie 11 sont humides. L'installation risque de ne pas s'allumer, créant ainsi une gêne auprès de l'utilisateur. Cet inconvénient existe également lors du fonctionnement normal entre deux cycles.
This procedure, if it complies with the specifications in force in most countries and valid for boilers, has the following drawbacks for the specific use of direct heating by combustion products:
  • when the installation is stopped, the liquid from the bath 30 rises too quickly inside the chamber 3. The metal brought to its internal face at a temperature of the order of 1000 ° C. is suddenly cooled, which creates significant thermal stresses and deteriorates its qualities which can lead to cracks. In addition, this causes vaporization of the liquid creating a vapor pressure which travels to the air solenoid valves 12 and gas 13 and to the pressure tapping membranes 8 and 9. This vapor pressure may also reach the fan. 7. Steam which is at a temperature above 100 ° C thus deteriorates the aforementioned organs which are most of the time designed for operating temperatures not exceeding 50 ° C and which do not accommodate high humidity.
  • - during the regulation of the installation, that is to say during the temporary stop between two operating cycles of the installation when the bath does not need heat (the installation functioning by all or nothing) the problems are identical, since the programmer carries out the post-scan as indicated above and waits for an order from the temperature probe to order another start. In other words, between two successive operating cycles, there are the aforementioned drawbacks existing following the shutdown of the installation.
  • - ignition is uncertain, because the installation being at a final stop at the end of work, a humid atmosphere prevails in the enclosure 16 of the upper part of the chamber 3, and the electrodes 17 of the spark plug 11 are wet . The installation may not light up, creating discomfort for the user. This drawback also exists during normal operation between two cycles.

On se reportera maintenant à la figure 2 montrant l'installation modifiée conforme à l'invention et dans laquelle les mêmes repères ont été utilisés pour repérer les pièces identiques.Reference will now be made to FIG. 2 showing the modified installation in accordance with the invention and in which the same references have been used to identify identical parts.

Conformément à l'invention, la mise en route du moteur 7 du ventilateur n'est plus commandée par la jonction 27 provenant du programmateur 6, mais directement par une jonction 21 reliée à la ligne d'alimentation en courant de l'installation, elle-même commandée par un relais 19 dont le contact 18 est temporisé à l'ouverture, le relais 19 étant lui-méme alimenté à travers le bouton marche/arrêt 20 de l'installation.According to the invention, the starting of the fan motor 7 is no longer controlled by the junction 27 coming from the programmer 6, but directly by a junction 21 connected to the current supply line of the installation, it even controlled by a relay 19, the contact 18 of which is timed on opening, the relay 19 itself being supplied through the on / off button 20 of the installation.

Il apparaît ainsi que tant que le bouton marche/ arrêt 20 sera fermé, le moteur 7 du ventilateur sera alimenté assurant la mise sous pression d'air de l'installation, et évitant par conséquent radicalement toute remontée de liquide du bain 30 dans la chambre de combustion 3.It thus appears that as long as the on / off button 20 is closed, the fan motor 7 will be supplied ensuring the air pressure of the installation, and consequently radically avoiding any rise of liquid from the bath 30 into the chamber combustion 3.

En outre, lors de l'arrêt de l'installation, par exemple en fin de journée, c'est-à-dire à l'ouverture du bouton marche/arrêt 20, le moteur 7 restera alimenté par la ligne 21 le temps de la temporisation du contact 18 et assurera le refroidissement nécessaire de la paroi de la chambre de combustion 3. La durée de temporisation sera suffisante pour assurer que la température de la paroi interne de la chambre 3 ne sera pas sensiblement supérieure à 100 °C; avec des installations de puissance classique, cette durée de temporisation pourra être de l'ordre de 8 à 10 mn environ. Ainsi, on assure la marche permanente du ventilateur 7 lorsque l'installation est sous tension, et le post-balayage en fin de travail pendant un temps suffisant, tout en utilisant un programmateur agréé assurant des temps de sécurité imposés par les spécifications et ne nécessitant aucune modification importante de l'installation.In addition, when the installation is stopped, for example at the end of the day, that is to say when the on / off button 20 is opened, the motor 7 will remain supplied by line 21 for the time of the time delay of the contact 18 and will ensure the necessary cooling of the wall of the combustion chamber 3. The time delay will be sufficient to ensure that the temperature of the internal wall of the chamber 3 will not be substantially greater than 100 ° C; with conventional power installations, this duration of tem porization can be of the order of 8 to 10 minutes approximately. Thus, permanent operation of the fan 7 is ensured when the installation is energized, and post-scanning at the end of work for a sufficient time, while using an approved programmer ensuring safety times imposed by the specifications and not requiring no significant modification of the installation.

En ce qui concerne la sûreté de l'allumage, et selon une autre caractéristique de l'invention, on soufflera les électrodes 17 de la bougie 11 à l'air à travers un tube 22 alimenté par l'intermédiaire d'une électrovanne 23 en dérivation sur le circuit de soufflage d'air principal 29 du ventilateur.With regard to ignition safety, and according to another characteristic of the invention, the electrodes 17 of the spark plug 11 will be blown into the air through a tube 22 supplied by means of a solenoid valve 23 in bypass on the main air supply circuit 29 of the fan.

Dans l'exemple illustré de commande, l'électrovanne 23 est alimentée à partir de la jonction 27 du programmateur qui servait initialement à commander la mise en route du ventilateur en pré et post-balayages. L'alimentation de l'électrovanne 23 se fait en outre à travers le contact 24 d'un relais 25 alimenté par la jonction 27 et temporisé à la fermeture. La temporisation pourra être de 30 secondes environ, correspondant au temps de pré-balayage. Par cette disposition, les électrodes 17 de la bougie 11 sont soufflées et débarrassées de leur humidité avant l'alimentation du transformateur 10, et ce à chaque cycle d'allumage. De cette manière, on évite non seulement à l'origine la production de vapeur d'eau dans la partie supérieure 16 de la chambre de combustion, mais on débarrasse également efficacement les électrodes 17 de toute trace d'humidité au début de chaque cycle d'allumage.In the illustrated control example, the solenoid valve 23 is supplied from junction 27 of the programmer which was initially used to control the start-up of the fan in pre and post-sweeps. The supply of the solenoid valve 23 is also done through the contact 24 of a relay 25 supplied by the junction 27 and delayed on closing. The time delay may be approximately 30 seconds, corresponding to the pre-sweep time. By this arrangement, the electrodes 17 of the spark plug 11 are blown and rid of their moisture before the transformer 10 is supplied, and this at each ignition cycle. In this way, not only is the origin of the production of water vapor in the upper part 16 of the combustion chamber avoided, but the electrodes 17 are also effectively rid of all traces of moisture at the start of each cycle d 'ignition.

Claims (2)

1. Plant of the type comprising at least one burner (1) having a submerged combustion chamber (3), a fuel intake, an intake for combustion air pressurised by a blower (7) or the like and operated as soon as the plant is switched on by means of a start/stop button (20), an automatic lighting device comprising sparking means (11) or the like, a programmer (6) which successively and at the appropriate moments commands an air-scavenging of the plant, the arrival of fuel, ignition of the burner and stoppage of the fuel supply, the said plant being characterised in that
-the blower (7) is directly supplied by the circuit (21) for switching on the plant and is controlled by means of a delayed action relay (19) which is itself energised by the said circuit (21) via the start/stop button for operating the plant;
- and in that it comprises in parallel with the intake of combustion air (29) to the burner (1) a branching circuit (22) which blows air over the spark plugs (11) or the like and which is operated by an electrically operated valve (23) via a delayed action relay (25) energised by the programmer (6), the time lag corresponding substantially to the time required for air-scavenging of the plant prior to the arrival of fuel and ignition of the burner.
2. Plant according to Claim 1, characterised in that the time-lag of the said relay (19) in respect of the opening is several minutes, for example about 10 minutes.
EP19830401863 1983-09-23 1983-09-23 Apparatus for improving the operational characteristics of a heating appliance with submerged combustion Expired EP0135639B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8383401863T DE3379592D1 (en) 1983-09-23 1983-09-23 Apparatus for improving the operational characteristics of a heating appliance with submerged combustion
EP19830401863 EP0135639B1 (en) 1983-09-23 1983-09-23 Apparatus for improving the operational characteristics of a heating appliance with submerged combustion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19830401863 EP0135639B1 (en) 1983-09-23 1983-09-23 Apparatus for improving the operational characteristics of a heating appliance with submerged combustion

Publications (2)

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EP0135639A1 EP0135639A1 (en) 1985-04-03
EP0135639B1 true EP0135639B1 (en) 1989-04-12

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CN111189230B (en) * 2018-11-15 2023-02-07 青岛经济技术开发区海尔热水器有限公司 Automatic control method of gas water heater and gas water heater
CN109990273A (en) * 2019-04-30 2019-07-09 无锡特莱姆气体设备有限公司 Submerged combustion gasifier burner and its combustion control system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2118479A (en) * 1938-03-24 1938-05-24 Submerged Comb Company Of Amer Submerged combustion burner
US2375840A (en) * 1941-12-23 1945-05-15 Elematic Corp Liquid heating apparatus
US2767784A (en) * 1951-03-22 1956-10-23 Ind Systems Inc Fuel burner
FR1439336A (en) * 1965-05-03 1966-05-20 Mere Ind Heating or combustion devices
CH490641A (en) * 1965-12-02 1970-05-15 Hanrez Sa J Atel Apparatus for heating a fluid
FR2195326A5 (en) * 1972-08-04 1974-03-01 Aquitaine Petrole
US4122557A (en) * 1977-07-29 1978-10-31 Harris Frank N Incinerator

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DE3379592D1 (en) 1989-05-18
EP0135639A1 (en) 1985-04-03

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