EP1172607B1 - Brûleur à mélange de gaz et d'air à puissance accrue - Google Patents
Brûleur à mélange de gaz et d'air à puissance accrue 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
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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
- 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.
- 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.
Claims (7)
- Brûleur (10) comprenant :un corps (12) équipé d'au moins un moyen (14) support de flammes muni d'orifices (17) pour le passage à travers eux d'un mélange de gaz enflammés afin de former des flammes principales (F), etun système d'alimentation (20) en mélange de gaz combustible et d'air comburant relié au moyen (14) support de flammes,des moyens auxiliaires (30) de combustion pour envoyer un flux gazeux (G) sensiblement en direction desdites flammes principales avec les gaz enflammés desquelles il se mélange pour créer des flammes secondaires (F') qui se développent entre les flammes principales (F), ou à la suite de celles-ci, de façon à apporter un surcroít de puissance au moyen (14) support de flammes avec lequel les moyens auxiliaires (30) de combustion coopèrent, caractérisé en ce que les moyens auxiliaires de combustion (30) comprennent au moins un injecteur (32) relié à une source de gaz combustible sensiblement pur et émettant un jet turbulent dudit gaz sensiblement pur donnant naissance aux flammes secondaires (F').
- Brûleur (10) selon la revendication 1, caractérisé en ce que le système d'alimentation (20) comprend :des moyens (25, 26, 27) pour déclencher l'ouverture de l'alimentation en gaz combustible des moyens (30) auxiliaires de combustion uniquement lorsque les moyens (14) support de flammes sont à puissance maximum, etdes moyens (25, 26, 27) pour déclencher la fermeture de l'alimentation en gaz combustible des moyens (30) auxiliaires de combustion lorsque la puissance du moyen (14) support de flammes passe sensiblement sous ladite puissance maximum.
- Brûleur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que :les moyens (14) support de flammes sont constitués par une tête de combustion (15) alimentée par une source à mélange de gaz combustible et d'air comburant réglable en puissance, les flammes principales (F) étant alors modulables et se développant alors sur le pourtour de cette tête, au niveau des orifices (17) de passage du mélange de gaz enflammés, etles moyens auxiliaires (30) de combustion sont à réglage de type tout ou rien.
- Brûleur (10) selon la revendication 3, caractérisé en ce que :la tête de combustion (15) est à section circulaire,les injecteurs (32) sont disposés de façon concentrique avec la tête de combustion selon un cercle ayant un rayon (r) et ils sont inclinés en faisant un certain angle (α) avec la verticale, etle rayon (r) du cercle et l'angle (α) d'inclinaison sont choisis de telle sorte que les injecteurs (32) pointent en direction du point d'extrémité (H) des flammes principales (F).
- Brûleur (10) selon la revendication 4, caractérisé en ce que la tête de combustion (15) est de type annulaire et présente des orifices (17) de passage du mélange de gaz adaptés pour que les flammes principales (F) se développent vers le centre (A) de ladite tête (15), et les injecteurs (32) sont situés à l'intérieur de l'anneau et orientés de façon centrifuge, en direction du point d'extrémité (H) des flammes principales (F).
- Brûleur (10) selon l'une quelconque des revendications 3 à 5, caractérisé en ce que la tête de combustion (15) intègre directement les injecteurs (32) des moyens auxiliaires (30) de combustion.
- Appareil de cuisson ou de chauffage équipé d'un brûleur (10) selon l'une quelconque des revendications précédentes.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0008976A FR2811410B1 (fr) | 2000-07-10 | 2000-07-10 | Bruleur a melange de gaz et d'air a puissance accrue |
FR0008976 | 2000-07-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1172607A1 EP1172607A1 (fr) | 2002-01-16 |
EP1172607B1 true EP1172607B1 (fr) | 2005-12-14 |
Family
ID=8852302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20010401572 Expired - Lifetime EP1172607B1 (fr) | 2000-07-10 | 2001-06-15 | Brûleur à mélange de gaz et d'air à puissance accrue |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1172607B1 (fr) |
DE (1) | DE60115773T2 (fr) |
ES (1) | ES2249397T3 (fr) |
FR (1) | FR2811410B1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1917471B1 (fr) * | 2005-08-16 | 2019-03-20 | BSH Hausgeräte GmbH | Dispositif d'augmentation de puissance limitée dans le temps |
DE102008019117A1 (de) | 2008-04-16 | 2009-10-22 | Man Turbo Ag | Verfahren zum Betreiben eines Vormischbrenners und ein Vormischbrenner zur Durchführung des Verfahrens |
DE102010023090A1 (de) * | 2010-05-31 | 2011-12-01 | E.G.O. Elektro-Gerätebau GmbH | Verfahren zur Steuerung eines Gasbrenners und Gas-Kochfeld mit mehreren Gasbrennern |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE524547C (de) * | 1929-11-05 | 1931-05-08 | Vosswerke Akt Ges | Doppelsparbrenner |
GB628196A (en) * | 1947-06-26 | 1949-08-24 | Brockhouse J & Co Ltd | Improvements in or relating to gas burners |
ATE149662T1 (de) * | 1990-11-12 | 1997-03-15 | De Longhi Spa | Brenner, insbesondere für gaskochervorrichtung, mit einer grossen betriebsflexibilität |
DE4434742C2 (de) * | 1994-09-28 | 2001-01-11 | Imp Werke Gmbh & Co | Verfahren und Vorrichtung zum Regeln der Gaszufuhr bei einem Zweikreisgasbrenner |
WO1998030838A1 (fr) * | 1997-01-09 | 1998-07-16 | Robertshaw Controls Company | Brûleur a gaz a entree variable |
-
2000
- 2000-07-10 FR FR0008976A patent/FR2811410B1/fr not_active Expired - Fee Related
-
2001
- 2001-06-15 DE DE2001615773 patent/DE60115773T2/de not_active Expired - Lifetime
- 2001-06-15 ES ES01401572T patent/ES2249397T3/es not_active Expired - Lifetime
- 2001-06-15 EP EP20010401572 patent/EP1172607B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2249397T3 (es) | 2006-04-01 |
EP1172607A1 (fr) | 2002-01-16 |
DE60115773T2 (de) | 2006-07-06 |
FR2811410A1 (fr) | 2002-01-11 |
DE60115773D1 (de) | 2006-01-19 |
FR2811410B1 (fr) | 2002-10-04 |
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