EP1172607B1 - Gas burner with increased power - Google Patents
Gas burner with increased power Download PDFInfo
- Publication number
- EP1172607B1 EP1172607B1 EP20010401572 EP01401572A EP1172607B1 EP 1172607 B1 EP1172607 B1 EP 1172607B1 EP 20010401572 EP20010401572 EP 20010401572 EP 01401572 A EP01401572 A EP 01401572A EP 1172607 B1 EP1172607 B1 EP 1172607B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- flames
- head
- combustion
- injectors
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
- F23D14/06—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/08—Arrangement or mounting of burners
- F24C3/085—Arrangement or mounting of burners on ranges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14062—Special features of gas burners for cooking ranges having multiple flame rings
Definitions
- the field of the invention is that of gas mixture burners fuel and combustion air, in particular air induction and partial premixing of gas and air, such as in particular the burners for industrial or private ranges.
- burners of the type comprising a body equipped with at least one flame support means provided with orifices for the passage of burning gases through them in order to forming main flames, and a feed system in a mixture of fuel gas and combustion air connected to the flame support means.
- These burners quite typical as those with circular blue flames (or crown) with atmospheric air induction and partial premix, various disadvantages in particular related to their surface yield often insufficient (in particular for professional use) and / or pollution (emission of polluting gases).
- the object of the invention is to obtain a power density at level of the main flames of the burner, much higher than that provided by a burner, as described in WO-A-98 30838, combining two means different combustion through which escapes the same mixture gaseous.
- the auxiliary means of combustion comprise at least one injector connected to a source of gas substantially pure fuel and emitting a turbulent jet of said gas substantially pure giving birth to secondary flames.
- the turbulent jet thus created in the immediate environment of main flames allows improved combustion due to its speed which generates a better mixing of the surrounding air.
- the burning of the secondary flames and the burning of the mixture of fuel gas and combustion air interact, which increases the power density provided by a fuel air mixture burner and oxidizing gas for a given level of pollution.
- the air mixing increases the heat transfer coefficient to the container at heat (saucepan for example).
- the auxiliary combustion means will not start only when the power of the main burner is reached, so that "booster" this burner at once, for example to increase very quickly power under a pot of water to heat, all without increase the size of the burner.
- the support means flames are constituted by a combustion head fed by a power-adjustable gas mixture source, the main flames being then adaptable and then developing around the circumference of this head, level of the flaming gas through-holes, and that the means auxiliary combustion are then all or nothing type (open closed).
- the head of combustion will preferably be circular in section and the injectors will be then placed on a concentric circle with the combustion head and inclined a non-zero angle with the vertical, the radius of the circle and the angle of inclination being then chosen so that the injectors point in the direction of the end of the main flames coming out of the combustion head.
- injectors may be four regularly distributed on a circle and they will point to the exit holes of the head circular burner, more precisely towards the end of the flames outgoing from this head so that the pure gas coming out of injectors is propelled towards the end of said main flames.
- the combustion head can be annular and have adapted gas mixture passage orifices for the main flames to develop towards the center of said head, and the injectors will then preferably be located inside this ring and centrifugally oriented towards the main flames at from their end.
- This structure further reduces the size of the burner because injectors are arranged inside the head.
- the head of combustion can directly integrate injectors auxiliary means of combustion.
- the invention also relates to a cooking appliance (such as a cooker) or heater (water heater) equipped with a burner as described, with its auxiliary means of combustion.
- a cooking appliance such as a cooker
- heater water heater
- the invention relates to a gas mixture burner 10 comprising a body 12, typically made of metal (eg cast aluminum) on which is mounted a means 14 flame support in the form of a combustion head substantially horizontal, for example brass, provided with a cap 16.
- This head of combustion 15 is for example here circular section of center A, as it can be seen more precisely in Figure 2. It is also pierced several lateral orifices 17 (see FIG. 3) adapted to allow the passage of a premix of ignited gases (natural gas and air) for the formation of main flames F (or primary) which develop in crown shape around the head.
- the burner 10 also comprises a supply system 20 connected in particular to the combustion head. It is described in more detail later in Figure 4.
- the burner 10 is also provided with auxiliary means (or secondary) of combustion occurring under the form of one or more injectors 32 projecting from the body.
- injectors 32 for example four in number arranged concentrically around the combustion head in a circle of center A and radius R, are supplied with substantially pure fuel gas (i.e. substantially comprising only combustible gas, or at least no gas oxidant) at a preferably constant pressure. They are independent of the combustion head 15 and operate in all or nothing, while the head of combustion is, on the contrary, adjustable in power so as to give
- injectors 32 co-operate closely with the combustion head 15 so as to be able to provide a localized excess of power when desired.
- injectors 32 are provided to send a stream of pure gas directed towards the gases in combustion forming the flames coming out of the combustion head, and particular towards the H point, at the end of the main flames (see Figure 5).
- the injectors 32 can be inclined by making a non-zero angle ⁇ (positive or negative) with the vertical, for example if move the injectors away from the center of the head by increasing the radius R of the circle on which they are. It is best to always choose a circle diameter and an inclination angle ⁇ such that the jet of gas issuing from injectors 32 point towards the flaming gases forming the flames to mix with these, and preferably towards the end point of said main flames so that secondary flames F 'can be created correctly following or between main flames, by interlocking with them (the main flames then become "pilot" flames of secondary flames).
- ⁇ positive or negative
- injectors 32 are directly mounted on the combustion head 15 and not on the body 12.
- the head 15 is preferably annular and the main flames are directed to the center A of the head, while the injectors are placed in the middle of this ring and preferably directed, as for the solution preceding, towards the endpoint of the main flames.
- the injectors 32 may also be inclined at an angle ⁇ with the vertical, and a minimum distance from the peripheral orifices of the head must still be respected for performance issues.
- FIG 4 there is shown a schematic diagram of the system burner feed.
- This system 20 includes a first line 21 gas supply (natural gas for example) that supplies power to the mixing device (atmospheric air + natural gas) of the head of combustion and which is controlled by a safety valve 22 connected to a thermocouple 23.
- a second line 24 derives from the first line 22 of way to feed the injectors 32 in pure gas.
- the admission of gas to injectors 32 is controlled by the user with the aid of a solenoid valve 26 and a switch off stop 25. To ensure maximum safety, the admission of gas to the injectors is allowed only when the head of combustion is at full flow thanks to a pressure switch 27 connected on the line 21.
- the on-off button can only be operated when the pressure switch detected that the combustion head was at maximum power.
- this improved burner which can by example be mounted on a traditional gas stove (for housing) or professional (industrial kitchen), is very simple.
- the user wants to quickly increase the heating power of the burner under a dish or pan, it first puts the medium flame holder at maximum power by turning a knob provided for this effect. Then it activates the solenoid valve 26 and the on-off switch 25 (type "all or nothing" so).
- This has the effect of injecting pure gas into direction of the crown of main flames. It creates a jet turbulent gas that mixes with flaming gas main causes, causing the creation of secondary flames F 'that come add to the main flames.
- the pressure switch detecting a pressure drop below the maximum pressure, it automatically shuts off the gas inlet to the injectors, and the burner works again in normal mode, the effect "punctual supplement of "Of course, the user can, if he wishes, to control the shutdown of the injectors itself by means of the on-off button.
- This burner is therefore extremely easy to use as well as design. It is adaptable to many types of cooking appliances or heating (not shown), whether it be stoves, heaters gas, water heaters or other appliances equipped with premix burners partial or total which may require additional power easily get.
- the invention is not limited to the modes of achievements presented as an example.
- the head, and therefore the burner complete may have a shape other than circular or annular.
- the number and position of the injectors can also vary, particularly in depending on the shape of the head.
- Other gases may also be used in the place of natural gas such as oil gases or manufactured gases, for example.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Description
Le domaine de l'invention est celui des brûleurs à mélange de gaz combustible et d'air comburant, en particulier à induction d'air et prémélange partiel de gaz et d'air, tels notamment que les brûleurs pour cuisinières industrielles ou particulières.The field of the invention is that of gas mixture burners fuel and combustion air, in particular air induction and partial premixing of gas and air, such as in particular the burners for industrial or private ranges.
Dans ce domaine, on connaít déjà des brûleurs du type comprenant un corps équipé d'au moins un moyen support de flammes muni d'orifices pour le passage à travers eux de gaz enflammés afin de former des flammes principales, et un système d'alimentation en mélange de gaz combustible et d'air comburant relié au moyen support de flammes. Ces brûleurs, tout à fait typiques comme ceux à flammes bleues circulaires (ou en couronne) à induction d'air atmosphérique et prémélange partiel, présentent divers inconvénients notamment liés à leur rendement surfacique souvent insuffisant (en particulier en utilisation professionnelle) et/ou de pollution (rejet de gaz polluants). L'évolution de la demande du marché conduit d'une part à vouloir augmenter la puissance maximale de ces brûleurs tout en conservant leur encombrement, c'est-à-dire le rapport puissance/dimensions, et d'autre part à augmenter la plage d'utilisation (appelée "souplesse") qui est le rapport entre la puissance maximale et la puissance minimale disponible sur le brûleur. Compte tenu des contraintes normatives en matière d'émission polluantes (CO notamment), des contraintes de sécurité de fonctionnement et de l'état actuel de la technique, il devient difficile d'augmenter la densité de puissance pour une dimension (diamètre par exemple) de brûleur donné.In this field, we already know burners of the type comprising a body equipped with at least one flame support means provided with orifices for the passage of burning gases through them in order to forming main flames, and a feed system in a mixture of fuel gas and combustion air connected to the flame support means. These burners, quite typical as those with circular blue flames (or crown) with atmospheric air induction and partial premix, various disadvantages in particular related to their surface yield often insufficient (in particular for professional use) and / or pollution (emission of polluting gases). The evolution of market demand leads to a part of wanting to increase the maximum power of these burners while keeping their size, ie the ratio power / dimensions, and secondly to increase the range of use (called "flexibility") which is the ratio between maximum power and minimum power available on the burner. Given the constraints standards for polluting emissions (particularly CO), constraints of operational safety and the current state of the art it becomes difficult to increase the power density for a dimension (diameter for example) given burner.
Il est décrit dans WO-A-98 30838 un perfectionnement à ce type de brûleur consistant en ce que le brûleur comprend en outre des moyens auxiliaires de combustion pour envoyer un flux gazeux sensiblement en direction desdites flammes principales avec les gaz enflammés desquelles il se mélange pour créer des flammes secondaires qui se développent entre les flammes principales, ou à la suite de celles-ci, de façon à apporter un surcroít de puissance au moyen support de flammes avec lequel les moyens auxiliaires de combustion coopèrent.It is described in WO-A-98 30838 an improvement to this type of burner consisting of the burner further comprising means auxiliary combustion devices to send a gas stream substantially direction of said main flames with the flaming gases from which it mixes to create secondary flames that develop between main flames, or as a result of them, so as to bring extra of power by medium of flame with which the means Combustion auxiliaries cooperate.
Cette association de deux moyens de production de chaleur est simple à mettre en oeuvre et permet un gain de puissance au niveau du mélange des flammes principales et secondaires.This combination of two means of heat production is simple to implement and allows a gain of power at the level of mixture of main and secondary flames.
Toutefois, l'invention vise à obtenir une densité de puissance au niveau des flammes principales du brûleur, bien supérieure à celle procurée par un brûleur, tel que décrit dans WO-A-98 30838, associant deux moyens de combustion différents à travers lequel s'échappe un même mélange gazeux.However, the object of the invention is to obtain a power density at level of the main flames of the burner, much higher than that provided by a burner, as described in WO-A-98 30838, combining two means different combustion through which escapes the same mixture gaseous.
Elle vise en outre à proposer une solution simple, fiable, pratique et peu onéreuse. Pour ce faire, elle propose que les moyens auxiliaires de combustion comprennent au moins un injecteur relié à une source de gaz combustible sensiblement pur et émettant un jet turbulent dudit gaz sensiblement pur donnant naissance aux flammes secondaires.It also aims to provide a simple, reliable, practical solution and inexpensive. To this end, it proposes that the auxiliary means of combustion comprise at least one injector connected to a source of gas substantially pure fuel and emitting a turbulent jet of said gas substantially pure giving birth to secondary flames.
Le jet turbulent ainsi créé dans l'environnement immédiat des flammes principales permet une combustion améliorée en raison de sa vitesse qui engendre un meilleur brassage de l'air environnant. Autrement dit, la combustion des flammes secondaires et la combustion du mélange de gaz combustible et d'air comburant interagissent, ce qui permet d'augmenter la densité de puissance procurée par un brûleur à mélange d'air combustible et de gaz comburant pour un niveau de pollution donné. En outre, le brassage d'air augmente le coefficient de transfert thermique au récipient à chauffer (casserole par exemple).The turbulent jet thus created in the immediate environment of main flames allows improved combustion due to its speed which generates a better mixing of the surrounding air. Other said, the burning of the secondary flames and the burning of the mixture of fuel gas and combustion air interact, which increases the power density provided by a fuel air mixture burner and oxidizing gas for a given level of pollution. In addition, the air mixing increases the heat transfer coefficient to the container at heat (saucepan for example).
Afin d'optimiser l'allumage des moyens de combustion auxiliaires, il est prévu que le système d'alimentation du brûleur comprenne :
- des moyens pour déclencher l'ouverture de l'alimentation en gaz combustible des moyens auxiliaires de combustion uniquement lorsque les moyens support de flammes sont à puissance maximum, et
- des moyens pour déclencher la fermeture de l'alimentation en gaz combustible des moyens auxiliaires de combustion lorsque la puissance du moyen support de flammes passe sensiblement sous ladite puissance maximum.
- means for triggering the opening of the fuel gas supply of the auxiliary combustion means only when the flame support means are at maximum power, and
- means for triggering the closing of the fuel gas supply of the auxiliary combustion means when the power of the flame support means passes substantially below said maximum power.
Ainsi, les moyens de combustion auxiliaires ne se mettront en marche que lorsque la puissance du brûleur principal sera atteinte, de façon à "booster" ce brûleur d'un seul coup, par exemple pour augmenter très rapidement la puissance sous une casserole d'eau à chauffer, le tout sans augmenter la taille du brûleur.Thus, the auxiliary combustion means will not start only when the power of the main burner is reached, so that "booster" this burner at once, for example to increase very quickly power under a pot of water to heat, all without increase the size of the burner.
Pour des raisons liées à la souplesse d'utilisation et à la facilité de conception et de fabrication du brûleur, il est prévu que les moyens support de flammes soient constitués par une tête de combustion alimentée par une source à mélange de gaz réglable en puissance, les flammes principales étant alors modulables et se développant alors sur le pourtour de cette tête, au niveau des orifices de passage des gaz enflammés, et que les moyens auxiliaires de combustion soient alors à réglage de type tout ou rien (ouvert fermé).For reasons related to the flexibility of use and the ease of design and manufacture of the burner, it is expected that the support means flames are constituted by a combustion head fed by a power-adjustable gas mixture source, the main flames being then adaptable and then developing around the circumference of this head, level of the flaming gas through-holes, and that the means auxiliary combustion are then all or nothing type (open closed).
En particulier, pour une meilleure répartition des flammes, la tête de combustion sera de préférence à section circulaire et les injecteurs seront alors placés sur un cercle concentrique avec la tête de combustion et inclinés d'un angle non nul avec la verticale, le rayon du cercle et l'angle d'inclinaison étant alors choisis de telle sorte que les injecteurs pointent en direction de l'extrémité des flammes principales sortant de la tête de combustion. Les injecteurs pourront en particulier être au nombre de quatre régulièrement répartis sur un cercle et ils pointeront vers les orifices de sortie de la tête circulaire du brûleur, plus précisément vers l'extrémité des flammes principales sortant de cette tête de telle sorte que le gaz pur sortant des injecteurs soit propulsé vers l'extrémité desdites flammes principales. In particular, for a better distribution of the flames, the head of combustion will preferably be circular in section and the injectors will be then placed on a concentric circle with the combustion head and inclined a non-zero angle with the vertical, the radius of the circle and the angle of inclination being then chosen so that the injectors point in the direction of the end of the main flames coming out of the combustion head. The In particular, injectors may be four regularly distributed on a circle and they will point to the exit holes of the head circular burner, more precisely towards the end of the flames outgoing from this head so that the pure gas coming out of injectors is propelled towards the end of said main flames.
Selon une variante de réalisation, la tête de combustion pourra être annulaire et présenter des orifices de passage du mélange de gaz adaptés pour que les flammes principales se développent vers le centre de ladite tête, et les injecteurs seront alors de préférence situés à l'intérieur de cet anneau et orientés de façon centrifuge, en direction des flammes principales, au niveau de leur extrémité. Cette structure réduit encore la taille du brûleur car les injecteurs sont disposés à l'intérieur de la tête.According to an alternative embodiment, the combustion head can be annular and have adapted gas mixture passage orifices for the main flames to develop towards the center of said head, and the injectors will then preferably be located inside this ring and centrifugally oriented towards the main flames at from their end. This structure further reduces the size of the burner because injectors are arranged inside the head.
En particulier, dans un souci de compacité du dispositif, la tête de combustion pourra intégrer directement les injecteurs des moyens auxiliaires de combustion.In particular, for the sake of compactness of the device, the head of combustion can directly integrate injectors auxiliary means of combustion.
L'invention concerne aussi un appareil de cuisson (tel qu'une cuisinière) ou de chauffage (chauffe-eau) équipé d'un brûleur tel que décrit, avec ses moyens auxiliaires de combustion.The invention also relates to a cooking appliance (such as a cooker) or heater (water heater) equipped with a burner as described, with its auxiliary means of combustion.
L'invention et sa mise en oeuvre apparaítront encore plus clairement à l'aide de la description qui va suivre, faite en référence aux dessins dans lesquels :
- la figure 1 est une vue en perspective d'un brûleur conforme à l'invention,
- la figure 2 est une vue du dessus du brûleur de la figure 1,
- la figure 3 est une vue de côté de la figure 1,
- la figure 4 est un schéma d'alimentation en mélange de gaz pour le brûleur des figures précédentes, et
- la figure 5 est une vue en coupe d'une variante de réalisation de la figure 1.
- FIG. 1 is a perspective view of a burner according to the invention,
- FIG. 2 is a view from above of the burner of FIG. 1,
- FIG. 3 is a side view of FIG. 1,
- FIG. 4 is a gas mixture supply diagram for the burner of the preceding figures, and
- FIG. 5 is a sectional view of an alternative embodiment of FIG. 1.
Comme on peut le voir sur la figure 1, l'invention concerne un
brûleur 10 à mélange de gaz comprenant un corps 12, typiquement en métal
(par exemple en fonte d'aluminium) sur lequel est monté un moyen 14
support de flammes sous la forme d'une tête 15 de combustion sensiblement
horizontale, par exemple en laiton, munie d'un chapeau 16. Cette tête de
combustion 15 est par exemple ici de section circulaire de centre A, comme
on peut le voir de façon plus précise sur la figure 2. Elle est également percée
de plusieurs orifices latéraux 17 (voir figure 3) adaptés pour permettre le
passage d'un prémélange de gaz enflammés (gaz naturel et air) pour la
formation de flammes principales F (ou primaires) qui se développent en
forme de couronne autour de la tête. Le brûleur 10 comprend également un
système d'alimentation 20 relié en particulier à la tête de combustion. Il est
décrit plus en détail un peu plus loin à l'aide de la figure 4.As can be seen in FIG. 1, the invention relates to a
Comme on peut le remarquer, le brûleur 10 est aussi muni de
moyens 30 auxiliaires (ou secondaires) de combustion se présentant sous la
forme d'un ou plusieurs injecteurs 32 faisant saillie du corps. Ces injecteurs
32, par exemple au nombre de quatre disposés concentriquement autour de
la tête de combustion selon un cercle de centre A et de rayon R, sont
alimentés en gaz combustible sensiblement pur (autrement dit ne
comprenant sensiblement que du gaz combustible, ou du moins pas de gaz
comburant) à une pression de préférence constante. Ils sont indépendants de
la tête de combustion 15 et fonctionnent en tout ou rien, alors que la tête de
combustion est au contraire réglable en puissance de façon à donner
naissance à des flammes modulables F. Ces injecteurs 32 coopèrent
étroitement avec la tête de combustion 15 de façon à pouvoir apporter un
surcroít localisé de puissance lorsque cela est désiré. Pour cela, les injecteurs
32 sont prévus pour envoyer un flux de gaz pur dirigé en direction des gaz
en combustion formant les flammes sortant de la tête de combustion, et en
particulier en direction du point H, à l'extrémité des flammes principales
(voir figure 5).As can be seen, the
On peut noter que les injecteurs 32 peuvent être inclinés en faisant
un angle α non nul (positif ou négatif) avec la verticale, par exemple si on
éloigne un peu les injecteurs du centre de la tête en augmentant le rayon R
du cercle sur lequel ils se trouvent. Il est préférable de toujours choisir un
diamètre de cercle et un angle α d'inclinaison tels que le jet de gaz sortant des
injecteurs 32 pointe en direction des gaz en combustion formant les flammes
principales pour qu'il se mélange à ceux-ci, et de préférence en direction du
point d'extrémité desdites flammes principales de telle sorte que des
flammes secondaires F' puissent se créer correctement à la suite ou entre les
flammes principales, par interallumage avec celles-ci (les flammes principales
deviennent alors des flammes "pilotes" des flammes secondaires).It can be noted that the
Sur la variante de réalisation de la figure 5, les injecteurs 32 sont
directement montés sur la tête de combustion 15 et non plus sur le corps 12.
Dans ce cas, la tête 15 est de préférence annulaire et les flammes principales
sont dirigées vers le centre A de la tête, tandis que les injecteurs sont placés
au milieu de cet anneau et dirigé de préférence, comme pour la solution
précédente, en direction, du point d'extrémité des flammes principales. Les
injecteurs 32 pourront également être inclinés selon un angle α avec la
verticale, et une distance minimale par rapport aux orifices périphériques de
la tête doit quand même être respectée pour des questions de rendement.In the variant embodiment of FIG. 5,
Sur la figure 4, on voit représenté un schéma descriptif du système
d'alimentation du brûleur. Ce système 20 comprend une première ligne 21
d'alimentation en gaz (gaz naturel par exemple) qui vient alimenter le
dispositif de mélange (air atmosphérique + gaz naturel) de la tête de
combustion 15 et qui est commandée par un robinet à sécurité 22 lié à un
thermocouple 23. Une seconde ligne 24 dérive de la première ligne 22 de
façon à alimenter les injecteurs 32 en gaz pur. L'admission de gaz vers les
injecteurs 32 est commandée par l'utilisateur à l'aide d'une électrovanne 26 et
un interrupteur marche arrêt 25. Pour assurer une sécurité maximum,
l'admission de gaz aux injecteurs n'est autorisée que lorsque la tête de
combustion est à plein débit grâce à un pressostat 27 connecté sur la ligne
principale 21. Le bouton marche arrêt ne peut donc être actionné que lorsque
le pressostat a détecté que la tête de combustion était à puissance maximum. In Figure 4, there is shown a schematic diagram of the system
burner feed. This
Le fonctionnement de ce brûleur perfectionné, qui peut par
exemple être monté sur une cuisinière à gaz traditionnelle (pour habitat) ou
professionnelle (cuisine industrielle), est très simple. Lorsque l'utilisateur
souhaite augmenter rapidement la puissance de chauffe du brûleur sous un
plat ou une casserole, il met d'abord le moyen support de flamme au
maximum de sa puissance en tournant un bouton de réglage prévu à cet
effet. Ensuite, il actionne l'électrovanne 26 et l'interrupteur marche arrêt 25
(de type "tout ou rien" donc). Cela a pour effet d'injecter du gaz pur en
direction de la couronne de flammes principales. Il se crée alors un jet
turbulent de gaz qui se mélange aux gaz en combustion des flammes
principales, provoquant la création de flammes secondaires F' qui viennent
s'ajouter aux flammes principales. L'interallumage qui se crée entre les
flammes principales et les flammes secondaires permet de stabiliser
l'ensemble et d'assurer une combustion à haut rendement et à émission
réduite de polluant (CO, Nox). A l'endroit des flammes principales, il y a
donc un surcroít important de puissance qui permet, sans augmenter les
dimensions de la tête de combustion, de chauffer un récipient très
rapidement. La densité de chaleur présente sous le récipient est donc
nettement augmentée par rapport aux brûleurs de l'art antérieur.The operation of this improved burner, which can by
example be mounted on a traditional gas stove (for housing) or
professional (industrial kitchen), is very simple. When the user
wants to quickly increase the heating power of the burner under a
dish or pan, it first puts the medium flame holder at
maximum power by turning a knob provided for this
effect. Then it activates the
Une fois que le récipient et son contenu sont assez chauds, il suffit de réduire légèrement la puissance de la tête de combustion. Le pressostat détectant une baisse de pression en dessous de la pression maximum, il coupe automatiquement l'admission de gaz aux injecteurs, et le brûleur fonctionne de nouveau en mode normal, l'effet "surcroít ponctuel de puissance " disparaissant. Bien entendu, l'utilisateur peut, s'il le souhaite, commander lui-même l'arrêt des injecteurs à l'aide du bouton marche arrêt.Once the container and its contents are hot enough, just slightly reduce the power of the combustion head. The pressure switch detecting a pressure drop below the maximum pressure, it automatically shuts off the gas inlet to the injectors, and the burner works again in normal mode, the effect "punctual supplement of "Of course, the user can, if he wishes, to control the shutdown of the injectors itself by means of the on-off button.
A titre d'exemple, pour une tête de combustion ayant une puissance maximale de 5,2 kW et une puissance minimum de 1,5 kW, il a été possible d'obtenir, à l'aide des injecteurs présentés ci avant, une puissance maximum de 7,5 kW avec une souplesse passant de 3,4 à 5, un temps de montée en température réduit de 30% et un rendement normatif passant de 55% à plus de 60%. Cela est en particulier dû au fait que l'écoulement du gaz combustible pur sortant des injecteurs est turbulent, ce qui a pour effet d'augmenter le coefficient de transfert thermique en direction du récipient à chauffer.By way of example, for a combustion head having a maximum power of 5.2 kW and a minimum power of 1.5 kW, it has been possible to obtain, using the injectors presented above, a power maximum of 7.5 kW with a flexibility from 3.4 to 5, a time of temperature rise reduced by 30% and a normative efficiency from 55% to more than 60%. This is particularly due to the fact that the flow of gas pure fuel coming out of the injectors is turbulent, which has the effect of to increase the heat transfer coefficient towards the container to heat.
Ce brûleur est donc extrêmement simple à utiliser de même qu'à concevoir. Il est adaptable à de nombreux type d'appareils de cuisson ou de chauffage (non représentés), que ce soit des cuisinières, des chauffages au gaz, des chauffe-eau ou d'autres appareils équipés de brûleurs à prémélange partiel ou total qui peuvent nécessiter un surcroít de puissance facile à obtenir.This burner is therefore extremely easy to use as well as design. It is adaptable to many types of cooking appliances or heating (not shown), whether it be stoves, heaters gas, water heaters or other appliances equipped with premix burners partial or total which may require additional power easily get.
Par ailleurs, le surcoût de fabrication d'un tel brûleur est très faible, il peut se nettoyer ou se démonter aussi facilement qu'un brûleur normal, il fonctionne de façon sûre et fiable, il est peu polluant. Enfin il possède une souplesse d'utilisation accrue.Moreover, the extra cost of manufacturing such a burner is very low, it can be cleaned or disassembled as easily as a burner normal, it works safely and reliably, it is low pollutant. Finally he has increased flexibility of use.
Bien entendu, l'invention n'est nullement limitée aux modes de réalisations présentés à titre d'exemple. Ainsi, la tête, et donc le brûleur au complet, peuvent avoir une forme autre que circulaire ou annulaire. Le nombre et la position des injecteurs peut aussi varier, en particulier en fonction de la forme de la tête. D'autres gaz peuvent également être utilisés à la place du gaz naturel tels que les gaz de pétroles ou les gaz manufacturés, par exemple.Of course, the invention is not limited to the modes of achievements presented as an example. Thus, the head, and therefore the burner complete, may have a shape other than circular or annular. The number and position of the injectors can also vary, particularly in depending on the shape of the head. Other gases may also be used in the place of natural gas such as oil gases or manufactured gases, for example.
Claims (7)
- Burner (10) comprising:a body (12) equipped with at least one flame-support means (14) provided with orifices (17) for the passage therethrough of a mixture of burning gases in order to form main flames (F), anda system (20) for supplying a mixture of fuel gas and oxidant air, which system is connected to the flame-support means (14),auxiliary combustion means (30) for sending a gaseous stream (G) substantially in the direction towards said main flames, with whose burning gases the gaseous stream is mixed to create secondary flames (F') which spread between the main flames (F), or behind them, in order to bring an increase in power to the flame-support means (14) with which the auxiliary combustion means (30) co-operate, characterised in that the auxiliary combustion means (30) comprise at least one injector (32) which is connected to a source of substantially pure fuel gas and which emits a turbulent jet of said substantially pure gas giving rise to the secondary flames (F').
- Burner (10) according to claim 1, characterised in that the supply system (20) comprises:means (25, 26, 27) for triggering the opening of the supply of fuel gas to the auxiliary combustion means (30) only when the flame-support means (14) are at maximum power, andmeans (25, 26, 27) for triggering the closing of the supply of fuel gas to the auxiliary combustion means (30) when the power of the flame-support means (14) passes substantially below said maximum power.
- Burner (10) according to either of the preceding claims, characterised in that:the flame-support means (14) are constituted by a combustion head (15) supplied by a source comprising a mixture of fuel gas and oxidant air which can be adjusted in power, the main flames (F) then being modulable and then spreading over the periphery of that head, at the orifices (17) for the passage of the mixture of burning gases, andthe auxiliary combustion means (30) have all-or-nothing-type control.
- Burner (10) according to claim 3, characterised in that:the combustion head (15) has a circular cross-section,the injectors (32) are arranged concentrically with the combustion head in accordance with a circle having a radius (r) and they are inclined to form a specific angle (α) with the vertical, andthe radius (r) of the circle and the angle (α) of inclination are selected in such a manner that the injectors (32) point in the direction towards the end point (H) of the main flames (F).
- Burner (10) according to claim 4, characterised in that the combustion head (15) is of the annular type and has orifices (17) for the passage of the gas mixture which are in a form such that the main flames (F) spread towards the centre (A) of said head (15), and the injectors (32) are located inside the ring and are oriented in a centrifugal manner, in the direction towards the end point (H) of the main flames (F).
- Burner (10) according to any one of claims 3 to 5, characterised in that the combustion head (15) incorporates directly the injectors (32) of the auxiliary combustion means (30).
- Cooking or heating apparatus equipped with a burner (10) according to any one of the preceding claims.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0008976A FR2811410B1 (en) | 2000-07-10 | 2000-07-10 | INCREASED GAS AND AIR MIXTURE BURNER |
| FR0008976 | 2000-07-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1172607A1 EP1172607A1 (en) | 2002-01-16 |
| EP1172607B1 true EP1172607B1 (en) | 2005-12-14 |
Family
ID=8852302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20010401572 Expired - Lifetime EP1172607B1 (en) | 2000-07-10 | 2001-06-15 | Gas burner with increased power |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1172607B1 (en) |
| DE (1) | DE60115773T2 (en) |
| ES (1) | ES2249397T3 (en) |
| FR (1) | FR2811410B1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TR201905853T4 (en) | 2005-08-16 | 2019-05-21 | Bsh Hausgeraete Gmbh | Mechanism for time-limited power amplification |
| DE102008019117A1 (en) | 2008-04-16 | 2009-10-22 | Man Turbo Ag | Method for operating a premix burner and a premix burner for carrying out the method |
| DE102010023090A1 (en) * | 2010-05-31 | 2011-12-01 | E.G.O. Elektro-Gerätebau GmbH | Method of controlling a gas burner and gas hob with multiple gas burners |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE524547C (en) * | 1929-11-05 | 1931-05-08 | Vosswerke Akt Ges | Double economy burner |
| GB628196A (en) * | 1947-06-26 | 1949-08-24 | Brockhouse J & Co Ltd | Improvements in or relating to gas burners |
| ATE149662T1 (en) * | 1990-11-12 | 1997-03-15 | De Longhi Spa | BURNER, ESPECIALLY FOR GAS COOKER APPARATUS, WITH A GREAT OPERATIONAL FLEXIBILITY |
| DE4434742C2 (en) * | 1994-09-28 | 2001-01-11 | Imp Werke Gmbh & Co | Method and device for regulating the gas supply in a dual-circuit gas burner |
| WO1998030838A1 (en) * | 1997-01-09 | 1998-07-16 | Robertshaw Controls Company | Variable input gas top burner |
-
2000
- 2000-07-10 FR FR0008976A patent/FR2811410B1/en not_active Expired - Fee Related
-
2001
- 2001-06-15 ES ES01401572T patent/ES2249397T3/en not_active Expired - Lifetime
- 2001-06-15 EP EP20010401572 patent/EP1172607B1/en not_active Expired - Lifetime
- 2001-06-15 DE DE2001615773 patent/DE60115773T2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2811410B1 (en) | 2002-10-04 |
| DE60115773T2 (en) | 2006-07-06 |
| FR2811410A1 (en) | 2002-01-11 |
| EP1172607A1 (en) | 2002-01-16 |
| DE60115773D1 (en) | 2006-01-19 |
| ES2249397T3 (en) | 2006-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1306616B1 (en) | Gas burner of the atmospheric type | |
| CA2412117A1 (en) | Gas burner and cooking device that uses such a burner | |
| EP0313479B1 (en) | Heating device with a catalytic burner | |
| FR2499678A1 (en) | BURNER, BOILER, ASSEMBLY COMPRISING SAME, AND METHOD FOR BURNING LIQUID FUEL | |
| CA1123285A (en) | Combustion process for liquid fuel and burner for its use | |
| EP1172607B1 (en) | Gas burner with increased power | |
| FR2561754A1 (en) | COMBUSTION CHAMBER FOR HEATING APPARATUS | |
| EP0178198B1 (en) | Burner with a priorily mixture and an integrated pilot-flame | |
| EP0775868B1 (en) | Gas burner for a furnace for reheating steel industry products | |
| EP0391818B1 (en) | Gas burner unit for radiant tube heater | |
| WO2005039367A1 (en) | Ignition method for a solid fuel apparatus and apparatus for carrying out said method | |
| JP2001012709A (en) | Stove burner | |
| EP0893651A1 (en) | Burner for liquid and gaseous fuel with low nitric oxyde emission | |
| TWI628395B (en) | Liquid fuel stove | |
| EP0354099B1 (en) | Gas-fired hot air heater | |
| CA2543804A1 (en) | Ignition booster | |
| BE392883A (en) | ||
| EP0549416A1 (en) | Grid burner and heating installation comprising same | |
| FR2719361A1 (en) | Improvements to gas burners. | |
| FR2654194A1 (en) | Heating appliance, particularly intended to be built into an inside chimney | |
| EP1363072A1 (en) | Burner head for gas cooking apparatus | |
| FR2823557A1 (en) | Gas cooker hob has burner beneath heat resistant panel with holes for gas flames | |
| FR3081210A1 (en) | AIR / GAS PULSE PRE-MIXING BURNER DEVICE | |
| JP2007252785A (en) | Pot apparatus | |
| FR2833071A1 (en) | Multi-use gas burner, especially for cooking surface, has head with gas mixture passages angled to create turbulence in central zone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE ES FR GB IT Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| 17P | Request for examination filed |
Effective date: 20020207 |
|
| AKX | Designation fees paid |
Free format text: BE DE ES FR GB IT |
|
| 17Q | First examination report despatched |
Effective date: 20030625 |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE ES FR GB IT |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REF | Corresponds to: |
Ref document number: 60115773 Country of ref document: DE Date of ref document: 20060119 Kind code of ref document: P |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20060116 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2249397 Country of ref document: ES Kind code of ref document: T3 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20060915 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: CD Ref country code: FR Ref legal event code: CA Ref country code: FR Ref legal event code: CJ |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R081 Ref document number: 60115773 Country of ref document: DE Owner name: GDF SUEZ S.A., FR Free format text: FORMER OWNER: GAZ DE FRANCE (SERVICE NATIONAL), PARIS, FR Effective date: 20111028 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 16 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20160527 Year of fee payment: 16 Ref country code: ES Payment date: 20160525 Year of fee payment: 16 Ref country code: DE Payment date: 20160524 Year of fee payment: 16 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20160525 Year of fee payment: 16 Ref country code: FR Payment date: 20160526 Year of fee payment: 16 Ref country code: BE Payment date: 20160525 Year of fee payment: 16 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 60115773 Country of ref document: DE |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20170615 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20180228 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20180103 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170615 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170615 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170630 |
|
| REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20170630 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170630 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20181106 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20170616 |