EP2479500A1 - Heating device with a means for producing steam - Google Patents
Heating device with a means for producing steam Download PDFInfo
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- EP2479500A1 EP2479500A1 EP12151474A EP12151474A EP2479500A1 EP 2479500 A1 EP2479500 A1 EP 2479500A1 EP 12151474 A EP12151474 A EP 12151474A EP 12151474 A EP12151474 A EP 12151474A EP 2479500 A1 EP2479500 A1 EP 2479500A1
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- Prior art keywords
- steam
- air
- face
- combustion
- gas
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Classifications
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- 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
- F24C15/00—Details
- F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
- F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
- F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising
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- 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
- F24C15/00—Details
- F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
- F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
Definitions
- the present invention relates to food ovens used by food professionals or communities, and more particularly the means for heating and steam production of these food ovens.
- the document DE 20 2004 015 288 discloses a heating and steam generating device for heating and producing steam in the indoor atmosphere of a cooking oven enclosure.
- This heating device acts by indirectly heating the interior atmosphere of the furnace, since the hot gases of a burner are collected in an exhaust manifold to be circulated in the furnace enclosure while remaining inside the furnace. pipes. After circulation in the furnace chamber within the pipes, the hot gases are discharged outside the furnace.
- the pipes may in some cases pass through a water tank to heat it to produce steam.
- This document describes more particularly a thermal connection between the steam production compartment and the gas burner for transferring from the burner a quantity of heat for heating and vaporizing the water injected into the cavity.
- the vaporization of the water is essentially by thermal conduction of the heat energy of the combustion gases through the burner body.
- This device however, has the disadvantage of a poorly controlled steam production and too small amount.
- a problem proposed by the invention is to improve the production yield of water vapor in the interior atmosphere of an oven chamber, in particular by improving the transfer of thermal energy.
- the steam production compartment is thus reliably disposed with respect to the outlet face, downstream of the combustion zone, thereby receiving heat directly from the flow of combustion gases. This promotes a heat transfer by a convection phenomenon with the combustion gases, heat transfer which is more effective than a thermal conduction through the burner.
- the support element may comprise a substantially cylindrical wall extending in the mean direction of exit.
- the support means may comprise a support element extending away from the mean exit direction, preferably having a substantially frustoconical wall.
- An efficient and economical steam production compartment is thus produced by geometrical elements that are simple to manufacture and assemble.
- the substantially cylindrical wall may comprise at least one interruption defining said at least one steam outlet orifice. This avoids the drilling of one or more holes in the steam production compartment, which is long and expensive to achieve.
- the device may comprise means for channeling the combustion gases, shaped and arranged so as to channel at least a portion of the flow of combustion gases to the steam production compartment.
- the channeling means may comprise a pipe element with substantially frustoconical guiding wall.
- the channeling means may comprise a pipe element with substantially cylindrical guide wall.
- the outlet face may be lined, in part or in full, by means of protection of the combustion zone, arranged and shaped so as to keep away from the combustion zone circulating air present in the combustion zone. the inner atmosphere.
- the exit face may be bordered, in part or in full, by the support means and / or the channeling means arranged and shaped so as to keep the circulating air away from the combustion zone. present in the inner atmosphere.
- the invention provides an oven for cooking food, comprising a heating device and steam production as described above.
- the convection means make it possible to accelerate cooking and to better homogenize the temperature of the interior atmosphere of the oven enclosure.
- the relative positions of the convection means, the steam producing compartment, and the heating and steam generating device contribute to a better output of steam production.
- the support means and / or the channeling means are arranged and shaped so as to channel the combustion gases towards the blades of the centrifugal convection turbine.
- a furnace 1 for cooking food comprising an enclosure 3 containing a heating device and steam production 2.
- the heating device and steam production 2 can heat and produce steam in the atmosphere interior of the enclosure 3 of the oven 1 for cooking food.
- the heating and steam generating device 2 comprises a gas burner 4 having a burner hollow body 5 into which a mixture of air and gas is fed by an air inlet pipe 6 and of gas, the burner hollow body 5 having outlet orifices 7 distributed on an outlet face 8 for directing the mixture of air and gas into a combustion zone 9 in a mean direction of exit II.
- the mean exit direction II is defined as the average flow direction of the flow of combustion gases produced in the combustion zone 9. This flow is schematically illustrated by the flow lines 14 on the Figures 2 to 10 .
- the mean direction of exit II is situated substantially in the center of the exit face 8 and can be defined substantially as the axis of symmetry of the exit face 8.
- the heating and steam production device 2 comprises a steam production compartment 10, integral with the gas burner 4, defining a cavity 11 in communication with the furnace chamber 3 of the oven 1 via at least one a steam outlet port 12.
- the device for heating and producing steam 2 comprises means for supplying liquids 13, able to bring liquids such as water into the cavity 11 ( figure 2 ).
- the mixture of air and gas When using the heating and steam generating device 2, the mixture of air and gas is brought under pressure into the burner hollow body 5 via the inlet pipe 6. The mixture of air and gas then escapes from the hollow burner body 5 through the combustion gas outlet orifices 7 and burns in the combustion zone 9 located in the vicinity of the outlet face 8, producing combustion gases.
- the mixture of air and gas being brought under pressure, the combustion gases resulting from the combustion of the mixture of air and gas flow away from the gas burner 4 according to flow lines 14 having as their orientation mean the average direction of exit II ( Figures 2 to 10 ).
- the heating and steam production device 2 comprises support means 15 which keep the steam production compartment 10 in contact with the flow 14 of the In practice, this means that the combustion gases flow into and downstream of the combustion zone 9 by licking at least one wall or part of a wall of the combustion zone 9. steam production compartment 10.
- the steam production compartment 10 is thus located in or downstream of the combustion zone 9 in the mean direction of exit I-I in the flow direction of the flow of combustion gases.
- the support means 15 illustrated on the Figures 2 to 10 comprise a support member 16 extending from the exit face 8 and away from the exit face 8 in the mean exit direction II.
- the support element 16, integral with the burner 4, keeps the steam production compartment 10 in contact with the flow of combustion gases.
- the support member 16 has a substantially cylindrical wall 17 extending in the mean direction of exit II.
- the support means 15 comprise a support member 16 extending both in the mean direction of exit II and away from the mean direction of exit II.
- the support element 16 preferably comprises a substantially frustoconical wall 18 whose apex is oriented towards the gas burner 4.
- the portion 19, the circular ring 20 and the substantially cylindrical wall 21 may for example be assembled by welding.
- the substantially cylindrical wall 21 has at least one interruption 22 defining said at least one outlet port 12 of steam.
- the heating and steam generating device 2 comprises flue gas channeling means 23, shaped and arranged so as to channel at least a portion of the flow of combustion gases to the steam production compartment 10.
- the channeling means 23 consist of the support element 16 ( Figures 3 to 6 ) optionally supplemented by an additional pipe element 24 with a substantially frustoconical guide wall 25 ( Figures 9 and 10 ) or substantially cylindrical guide wall 26 ( Figures 7 and 8 ).
- the channeling means 23 are intended to direct or even concentrate the flow of combustion gas to the steam production compartment 10.
- the substantially frustoconical wall 25 of the additional pipe element 24 has an angle ⁇ greater than the angle ⁇ that the substantially frustoconical wall 18 of the support element 16 has.
- the exit face 8 is lined, in part or in full, by means of protection 36 of the zone of combustion 9 arranged and shaped so as to keep away from the combustion zone 9 circulating air present in the indoor atmosphere.
- the outlet face 8 is entirely bordered by the support member 16 and, if appropriate, by the additional pipe element 24. These elements fulfill the function of protection means 36.
- the outlet face 8 is entirely bordered by the sole support element 16.
- the exit face 8 is bordered only in part by the support element 16. It can also, on the Figures 7 to 10 , consider only partially border the exit face 8 by removing the additional pipe element 24.
- a furnace 1 comprising an enclosure 3 enclosing an interior atmosphere.
- the oven 1 comprises convection means 27 for circulating the air present in the interior atmosphere of the chamber 3.
- the convection means 27 allow better distribution of the combustion gases and their heat energy in the chamber 3 to promote a homogeneous distribution of heat and therefore substantially homogeneous cooking food to be processed regardless of the position of the food in the chamber 3 of the oven 1.
- the convection means 27 comprise a centrifugal convection turbine 28, driven in rotation by motor means 29 along an axis II-II generally perpendicular to a peripheral wall face 31, and disposed near the face 30.
- the centrifugal convection turbine 28 is adapted to suck the air axially substantially in the direction defined by the axis II-II (arrow 32) and to discharge it radially in an air discharge zone in parallel. at the face 30 of peripheral wall 31 (arrows 33).
- the heating and steam generating device 2 is located in the suction of the centrifugal convection turbine 28, the steam production compartment 10 being arranged between the gas burner 4 and the centrifugal convection turbine 28.
- the mean direction of exit II coincides substantially with the axis II-II.
- the mean direction of exit II is coaxial with axis II-II.
- the mixture of air and gas is fed through the inlet pipe 6 into the burner hollow body 5 and is consumed in the combustion zone 9.
- the mixture of air and gas being brought under pressure in the hollow burner body 5, the combustion gases resulting from the combustion of the mixture of air and gas are directed away from the gas burner 4 along lines of stream 14 having the mean average direction of exit II which, on the figure 2 , coincides with the II-II axis.
- the steam generating compartment 10 is located in contact with the flue gas stream so as to efficiently remove, by a predominant convection phenomenon, a quantity of heat which will be used to produce steam from liquids such as water. the water injected into the cavity 11 by the liquid supply means 13.
- the water vapor escapes from the steam production compartment 10 by said at least one interruption 22 and mixes with the interior atmosphere of the chamber 3 of the furnace 1.
- the steam production compartment 10 must be considered to be in contact with the flow of the combustion gases as soon as at least one wall portion delimiting the cavity 11 is heated by convection by the combustion gases from the lick.
- the combustion zone 9 is confined and protected between the support element 16 and the additional pipe element 24, which limits the combustion disturbances that would be induced by the circulating air present in the interior atmosphere of the furnace 1 , circulation caused by the centrifugal convection turbine 28 and illustrated schematically by the flow lines A to D.
- the supporting element 16 and the additional pipe element 24 have a channeling effect of the combustion gases to the steam production compartment 10, and are furthermore arranged and shaped so as to channel the combustion gases to the blades 35 of the centrifugal convection turbine 28, away from the drive means 29.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cookers (AREA)
- Commercial Cooking Devices (AREA)
Abstract
Description
La présente invention concerne les fours pour aliments utilisés par les professionnels de l'alimentation ou les collectivités, et plus particulièrement les moyens de chauffage et de production de vapeur de ces fours pour aliments.The present invention relates to food ovens used by food professionals or communities, and more particularly the means for heating and steam production of these food ovens.
L'utilisation de vapeur dans l'enceinte d'un four pour la cuisson d'aliments est bien connue. La production de vapeur permet notamment d'accélérer la cuisson des aliments en favorisant les échanges thermiques avec les aliments, sans pour autant que les aliments situés dans l'enceinte du four ne brûlent ni ne se dessèchent.The use of steam in the enclosure of an oven for cooking food is well known. In particular, the production of steam makes it possible to accelerate the cooking of food by promoting heat exchange with the food, without the food inside the oven burning or drying out.
Le document
Du document
- un brûleur à gaz ayant un corps creux de brûleur dans lequel est amené un mélange d'air et de gaz par une canalisation d'entrée d'air et de gaz, le corps creux de brûleur ayant des orifices de sortie répartis sur une face de sortie pour diriger le mélange d'air et de gaz dans une zone de combustion où les gaz de combustion produits se propagent selon une direction moyenne de sortie,
- un compartiment de production de vapeur, solidaire du brûleur à gaz, définissant une cavité en communication avec l'enceinte de cuisson du four par l'intermédiaire d'au moins un orifice de sortie de vapeur,
- des moyens d'amenée de liquides, aptes à amener des liquides tels que de l'eau dans ladite cavité.
- a gas burner having a burner hollow body into which a mixture of air and gas is fed by an air and gas inlet pipe, the burner hollow body having outlet orifices distributed on one face of outlet for directing the mixture of air and gas into a combustion zone where the combustion gases produced propagate in an average direction of exit,
- a steam production compartment, integral with the gas burner, defining a cavity in communication with the oven cooking chamber via at least one steam outlet orifice,
- means for supplying liquids capable of bringing liquids such as water into said cavity.
Ce document décrit plus particulièrement une liaison thermique entre le compartiment de production de vapeur et le brûleur à gaz pour transférer depuis le brûleur une quantité de chaleur destinée à échauffer et vaporiser l'eau injectée dans la cavité.This document describes more particularly a thermal connection between the steam production compartment and the gas burner for transferring from the burner a quantity of heat for heating and vaporizing the water injected into the cavity.
En pratique, la vaporisation de l'eau se fait essentiellement par conduction thermique de l'énergie calorifique des gaz de combustion par l'intermédiaire du corps de brûleur.In practice, the vaporization of the water is essentially by thermal conduction of the heat energy of the combustion gases through the burner body.
Ce dispositif présente toutefois l'inconvénient d'une production de vapeur mal maîtrisée et en trop faible quantité.This device, however, has the disadvantage of a poorly controlled steam production and too small amount.
Un problème proposé par l'invention est d'améliorer le rendement de production de vapeur d'eau dans l'atmosphère intérieure d'une enceinte de four, en améliorant notamment le transfert d'énergie thermique.A problem proposed by the invention is to improve the production yield of water vapor in the interior atmosphere of an oven chamber, in particular by improving the transfer of thermal energy.
Pour atteindre ces objets ainsi que d'autres, l'invention propose un dispositif de chauffe et de production de vapeur pour chauffer et produire de la vapeur dans l'atmosphère intérieure d'une enceinte de four de cuisson pour aliments, comportant :
- un brûleur à gaz ayant un corps creux de brûleur dans lequel est amené un mélange d'air et de gaz par une canalisation d'entrée d'air et de gaz, le corps creux de brûleur ayant des orifices de sortie répartis sur une face de sortie pour diriger le mélange d'air et de gaz dans une zone de combustion où les gaz de combustion produits se propagent selon une direction moyenne de sortie,
- un compartiment de production de vapeur, solidaire du brûleur à gaz, définissant une cavité en communication avec l'enceinte de cuisson du four par l'intermédiaire d'au moins un orifice de sortie de vapeur,
- des moyens d'amenée de liquides, aptes à amener des liquides tels que de l'eau dans ladite cavité,
- des moyens de support qui maintiennent le compartiment de production de vapeur au contact du flux des gaz de combustion ;
- a gas burner having a burner hollow body into which a mixture of air and gas is fed by an air and gas inlet pipe, the burner hollow body having outlet orifices distributed on one face of outlet for directing the mixture of air and gas into a combustion zone where the combustion gases produced propagate in an average direction of exit,
- a steam production compartment, integral with the gas burner, defining a cavity in communication with the oven cooking chamber via at least one steam outlet orifice,
- means for supplying liquids capable of bringing liquids such as water into said cavity,
- support means which keeps the steam generating compartment in contact with the flow of combustion gases;
Le compartiment de production de vapeur est ainsi disposé de façon fiable par rapport à la face de sortie, en aval de la zone de combustion, recevant ainsi de la chaleur directement par le flux des gaz de combustion. On favorise ainsi un transfert de chaleur par un phénomène de convexion avec les gaz de combustion, transfert de chaleur qui s'avère plus efficace qu'une conduction thermique par l'intermédiaire du brûleur.The steam production compartment is thus reliably disposed with respect to the outlet face, downstream of the combustion zone, thereby receiving heat directly from the flow of combustion gases. This promotes a heat transfer by a convection phenomenon with the combustion gases, heat transfer which is more effective than a thermal conduction through the burner.
Dans un premier mode de réalisation selon l'invention, l'élément de support peut comporter une paroi sensiblement cylindrique s'étendant selon la direction moyenne de sortie.In a first embodiment according to the invention, the support element may comprise a substantially cylindrical wall extending in the mean direction of exit.
Selon un deuxième mode de réalisation de l'invention, les moyens de support peuvent comprendre un élément de support s'étendant à l'écart de la direction moyenne de sortie, comportant de préférence une paroi sensiblement tronconique.According to a second embodiment of the invention, the support means may comprise a support element extending away from the mean exit direction, preferably having a substantially frustoconical wall.
Dans le cas d'un élément de support à paroi sensiblement tronconique, on peut prévoir que le compartiment de production de vapeur comporte une cavité délimitée par :
- une portion de surface de la paroi sensiblement tronconique de l'élément de support,
- une couronne circulaire rapportée et fixée de façon coaxiale sur l'élément de support,
- une paroi sensiblement cylindrique rapportée et fixée à la couronne circulaire et à la portion de surface de la paroi sensiblement tronconique de l'élément de support.
- a surface portion of the substantially frustoconical wall of the support element,
- a circular ring attached and fixed coaxially on the support member,
- a substantially cylindrical wall attached and fixed to the circular ring and the surface portion of the substantially frustoconical wall of the support member.
On réalise ainsi un compartiment de production de vapeur efficace et économique par des éléments de forme géométrique simples à fabriquer et à assembler.An efficient and economical steam production compartment is thus produced by geometrical elements that are simple to manufacture and assemble.
De préférence, la paroi sensiblement cylindrique peut comporter au moins une interruption définissant ledit au moins un orifice de sortie de vapeur. On évite ainsi le percement d'un ou plusieurs trous dans le compartiment de production de vapeur, ce qui est long et onéreux à réaliser.Preferably, the substantially cylindrical wall may comprise at least one interruption defining said at least one steam outlet orifice. This avoids the drilling of one or more holes in the steam production compartment, which is long and expensive to achieve.
De préférence, le dispositif peut comporter des moyens de canalisation des gaz de combustion, conformés et disposés de façon à canaliser une partie au moins du flux des gaz de combustion vers le compartiment de production de vapeur.Preferably, the device may comprise means for channeling the combustion gases, shaped and arranged so as to channel at least a portion of the flow of combustion gases to the steam production compartment.
On guide ainsi le flux de gaz de combustion vers le compartiment de production de vapeur, ce qui a pour conséquence d'augmenter l'énergie calorifique qui peut être transmise à l'eau injectée dans le compartiment de production de vapeur pour améliorer le rendement et la réactivité de la production de vapeur.The flow of combustion gas is thus guided to the steam production compartment, which has the consequence of increasing the heat energy which can be transmitted to the water injected into the steam production compartment in order to improve the efficiency and the reactivity of the steam production.
Avantageusement, les moyens de canalisation peuvent comporter un élément de canalisation à paroi de guidage sensiblement tronconique.Advantageously, the channeling means may comprise a pipe element with substantially frustoconical guiding wall.
En alternative, les moyens de canalisation peuvent comporter un élément de canalisation à paroi de guidage sensiblement cylindrique.Alternatively, the channeling means may comprise a pipe element with substantially cylindrical guide wall.
Avantageusement, la face de sortie peut être bordée, en partie ou en totalité, par des moyens de protection de la zone de combustion, disposés et conformés de façon à maintenir à l'écart de la zone de combustion l'air en circulation présent dans l'atmosphère intérieure.Advantageously, the outlet face may be lined, in part or in full, by means of protection of the combustion zone, arranged and shaped so as to keep away from the combustion zone circulating air present in the combustion zone. the inner atmosphere.
De préférence, la face de sortie peut être bordée, en partie ou en totalité, par les moyens de support et/ou les moyens de canalisation disposés et conformés de façon à maintenir à l'écart de la zone de combustion l'air en circulation présent dans l'atmosphère intérieure.Preferably, the exit face may be bordered, in part or in full, by the support means and / or the channeling means arranged and shaped so as to keep the circulating air away from the combustion zone. present in the inner atmosphere.
On protège ainsi la zone de combustion des gaz de l'air en circulation dans l'atmosphère intérieure de l'enceinte de four, notamment lorsque le four comporte des moyens de convexion forcée. En effet, la circulation d'air dans l'atmosphère intérieure du four peut provoquer des turbulences d'écoulement fluidique au voisinage de la face de sortie et de la zone de combustion, ce qui a pour effet de nuire au rendement du four par une combustion incomplète produisant en outre des gaz nocifs pour la santé.This protects the combustion zone of the circulating air gases in the interior atmosphere of the furnace chamber, especially when the furnace comprises means of forced convection. Indeed, the circulation of air in the interior atmosphere of the furnace can cause fluid flow turbulence in the vicinity of the exit face and the combustion zone, which has the effect of adversely affecting the efficiency of the furnace by Incomplete combustion also producing gases harmful to health.
Selon un autre aspect, l'invention propose un four pour la cuisson d'aliments, comprenant un dispositif de chauffe et de production de vapeur tel que décrit précédemment.In another aspect, the invention provides an oven for cooking food, comprising a heating device and steam production as described above.
Avantageusement, on peut prévoir que :
- le four comporte une turbine de convexion centrifuge de mise en circulation d'air, entraînée en rotation par des moyens moteurs selon un axe généralement perpendiculaire à une face de paroi périphérique, et disposée à proximité de la face de paroi périphérique, adaptée pour aspirer l'air axialement et pour le refouler radialement selon une zone de refoulement d'air parallèlement à la face de paroi périphérique,
- le dispositif de chauffe et de production de vapeur est situé dans l'aspiration de la turbine de convexion centrifuge,
- le compartiment de production de vapeur est disposé entre le brûleur à gaz et la turbine de convexion centrifuge.
- the furnace comprises a centrifugal convection turbine for circulating air, driven in rotation by motor means along an axis generally perpendicular to a peripheral wall face, and arranged near the peripheral wall face, adapted to suck the air axially and to discharge it radially in an air discharge zone parallel to the peripheral wall face,
- the heating and steam production device is located in the suction of the centrifugal convection turbine,
- the steam generating compartment is arranged between the gas burner and the centrifugal convection turbine.
Les moyens de convexion permettent d'accélérer la cuisson et de mieux homogénéiser la température de l'atmosphère intérieure de l'enceinte de four. Les positions relatives des moyens de convexion, du compartiment de production de vapeur et du dispositif de chauffe et de production de vapeur contribuent à un meilleur rendement de la production de vapeur.The convection means make it possible to accelerate cooking and to better homogenize the temperature of the interior atmosphere of the oven enclosure. The relative positions of the convection means, the steam producing compartment, and the heating and steam generating device contribute to a better output of steam production.
De préférence, les moyens de support et/ou les moyens de canalisation sont disposés et conformés de façon à canaliser les gaz de combustion vers les pales de la turbine de convexion centrifuge.Preferably, the support means and / or the channeling means are arranged and shaped so as to channel the combustion gases towards the blades of the centrifugal convection turbine.
Un tel guidage des gaz de combustion limite l'amenée de gaz de combustion directement sur les moyens moteurs des moyens de convexion à turbine de convexion centrifuge. On limite ainsi l'échauffement des moyens moteurs, et on réduit le risque de dégradation de ceux-ci.Such guidance of the combustion gases limits the supply of combustion gas directly to the motor means of the centrifugal convection turbine convexion means. This limits the heating of the motor means, and reduces the risk of degradation thereof.
D'autres objets, caractéristiques et avantages de la présente invention ressortiront de la description suivante de modes de réalisation particuliers, faite en relation avec les figures jointes, parmi lesquelles :
- la
figure 1 est une vue en perspective d'un four pour la cuisson d'aliments, comprenant un dispositif de chauffe et de production de vapeur selon l'invention ; - la
figure 2 est une vue en coupe partielle du four de lafigure 1 , montrant plus particulièrement le dispositif de chauffe et de production de vapeur ; - les
figures 3 à 10 illustrent divers modes de réalisation et variantes de dispositifs de chauffe et de production de vapeur selon l'invention.
- the
figure 1 is a perspective view of an oven for cooking food, comprising a heating device and steam production according to the invention; - the
figure 2 is a partial sectional view of the oven of thefigure 1 , showing more particularly the device for heating and producing steam; - the
Figures 3 to 10 illustrate various embodiments and variants of heating devices and steam production according to the invention.
Sur la
Sur les
La direction moyenne de sortie I-I est définie comme la direction moyenne d'écoulement du flux des gaz de combustion produits dans la zone de combustion 9. Cet écoulement est schématiquement illustré par les lignes de flux 14 sur les
Les gaz chauds issus du brûleur 4 se répandant directement dans l'atmosphère intérieure de l'enceinte 3, il s'agit d'un four 1 à chauffage direct.The hot gases from the
Sur les
Le dispositif de chauffe et de production de vapeur 2 comporte un compartiment de production de vapeur 10, solidaire du brûleur à gaz 4, définissant une cavité 11 en communication avec l'enceinte 3 de cuisson du four 1 par l'intermédiaire d'au moins un orifice 12 de sortie de vapeur.The heating and
On voit plus particulièrement sur la
Lors de l'utilisation du dispositif de chauffe et de production de vapeur 2, le mélange d'air et de gaz est amené sous pression dans le corps creux de brûleur 5 par la canalisation d'entrée 6. Le mélange d'air et de gaz s'échappe alors du corps creux de brûleur 5 par des orifices 7 de sortie de gaz de combustion et brûle dans la zone de combustion 9 située au voisinage de la face de sortie 8, produisant des gaz de combustion. Le mélange d'air et de gaz étant amené sous pression, les gaz de combustion issus de la combustion du mélange d'air et de gaz s'écoulent à l'écart du brûleur à gaz 4 selon des lignes de flux 14 ayant comme orientation moyenne la direction moyenne de sortie I-I (
Afin de prélever de l'énergie calorifique des gaz de combustion majoritairement selon un phénomène de convexion, le dispositif de chauffe et de production de vapeur 2 comporte des moyens de support 15 qui maintiennent le compartiment de production de vapeur 10 au contact du flux 14 des gaz de combustion, dans ou en aval de la zone de combustion 9. Cela signifie en pratique que les gaz de combustion s'écoulent dans et en aval de la zone de combustion 9 en venant lécher au moins une paroi ou une partie de paroi du compartiment de production de vapeur 10.In order to take heat energy from the combustion gases mainly by a convection phenomenon, the heating and
Le compartiment de production de vapeur 10 est ainsi situé dans ou en aval de la zone de combustion 9 selon la direction moyenne de sortie I-I dans le sens de l'écoulement du flux des gaz de combustion.The
En pratique, les moyens de support 15 illustrés sur les
Dans un premier mode de réalisation illustré plus particulièrement sur les
Dans un second mode de réalisation illustré plus particulièrement sur les
Sur les
une portion 19 de la surface de la paroi sensiblement tronconique 18 de l'élément desupport 16,- une couronne circulaire 20 rapportée et fixée de façon coaxiale sur l'élément de
support 16, - une paroi sensiblement cylindrique 21 rapportée et fixée à la
portion 19 de surface de la paroi sensiblement tronconique 18 de l'élément desupport 16 et à la couronne circulaire 20.
- a
portion 19 of the surface of the substantiallyfrustoconical wall 18 of thesupport element 16, - a
circular ring 20 attached and fixed coaxially on thesupport member 16, - a substantially
cylindrical wall 21 attached and fixed to thesurface portion 19 of the substantiallyfrustoconical wall 18 of thesupport element 16 and to thecircular ring 20.
La portion 19, la couronne circulaire 20 et la paroi sensiblement cylindrique 21 peuvent par exemple être assemblées par soudure.The
Sur les
Sur les
En l'espèce, les moyens de canalisation 23 sont constitués par l'élément de support 16 (
Les moyens de canalisation 23 ont pour but de diriger, voire de concentrer, le flux de gaz de combustion vers le compartiment de production de vapeur 10.The channeling means 23 are intended to direct or even concentrate the flow of combustion gas to the
Sur la
Pour limiter les perturbations induites par l'air en circulation présent dans l'atmosphère intérieure du four 1, on peut avantageusement prévoir que la face de sortie 8 est bordée, en partie ou en totalité, par des moyens de protection 36 de la zone de combustion 9 disposés et conformés de façon à maintenir à l'écart de la zone de combustion 9 l'air en circulation présent dans l'atmosphère intérieure.To limit the disturbances induced by the circulating air present in the interior atmosphere of the furnace 1, it can advantageously be provided that the
Dans les modes de réalisation et variantes illustrés sur les
Sur les
Sur les
L'utilisation et le fonctionnement d'un dispositif de chauffe et de production de vapeur 2 selon l'invention vont désormais être plus particulièrement décrits à l'aide des
Sur la
En l'espèce, les moyens de convexion 27 comportent une turbine de convexion centrifuge 28, entraînée en rotation par des moyens moteurs 29 selon un axe II-II généralement perpendiculaire à une face 30 de paroi périphérique 31, et disposée à proximité de la face 30 de paroi périphérique 31. La turbine de convexion centrifuge 28 est adaptée pour aspirer l'air axialement sensiblement selon la direction définie par l'axe II-II (flèche 32) et pour le refouler radialement selon une zone de refoulement d'air parallèlement à la face 30 de paroi périphérique 31 (flèches 33).In the present case, the convection means 27 comprise a
On voit plus particulièrement sur la
En pratique, la direction moyenne de sortie I-I coïncide sensiblement avec l'axe II-II. Sur les
Lors de l'utilisation du dispositif de chauffe et de production de vapeur 2, le mélange d'air et de gaz est amené par la canalisation d'entrée 6 dans le corps creux de brûleur 5 et se consume dans la zone de combustion 9. Le mélange d'air et de gaz étant amené sous pression dans le corps creux de brûleur 5, les gaz de combustion issus de la combustion du mélange d'air et de gaz se dirigent à l'écart du brûleur à gaz 4 selon des lignes de flux 14 ayant pour moyenne la direction moyenne de sortie I-I qui, sur la
Le compartiment de production de vapeur 10 est situé au contact du flux des gaz de combustion de façon à en prélever efficacement, par un phénomène prédominant de convexion, une quantité de chaleur qui sera utilisée pour produire de la vapeur à partir de liquides tels que de l'eau injectés dans la cavité 11 par les moyens d'amenée de liquides 13.The
Après évaporation de l'eau dans la cavité 11, la vapeur d'eau s'échappe du compartiment de production de vapeur 10 par ladite au moins une interruption 22 et se mélange à l'atmosphère intérieure de l'enceinte 3 du four 1.After evaporation of the water in the
On notera plus particulièrement que, dans le cas des
Sur la
Il est à noter en outre que, dans le cas de la
On augmente ainsi le rendement de la production de vapeur, tout en évitant l'amenée des gaz de combustion chauds directement sur les moyens moteurs 29, ce qui permet de limiter l'échauffement de ces derniers et de réduire le risque de leur dégradation.This increases the yield of steam production, while avoiding the supply of hot combustion gases directly to the drive means 29, which limits the heating of the latter and reduce the risk of degradation.
La présente invention n'est pas limitée aux modes de réalisation qui ont été explicitement décrits, mais elle en inclut les diverses variantes et généralisations contenues dans le domaine des revendications ci-après.The present invention is not limited to the embodiments which have been explicitly described, but it includes the various variants and generalizations thereof within the scope of the claims below.
Claims (13)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1150425A FR2970559A1 (en) | 2011-01-19 | 2011-01-19 | HEATING DEVICE WITH MEANS FOR PRODUCING STEAM |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2479500A1 true EP2479500A1 (en) | 2012-07-25 |
Family
ID=45464465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12151474A Withdrawn EP2479500A1 (en) | 2011-01-19 | 2012-01-17 | Heating device with a means for producing steam |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2479500A1 (en) |
FR (1) | FR2970559A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103196163A (en) * | 2013-04-12 | 2013-07-10 | 西北工业大学 | Totally-enclosed impact heat exchange gas cooker |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE705875A (en) * | 1965-10-21 | 1968-03-01 | ||
US4552123A (en) * | 1984-12-12 | 1985-11-12 | Thermo Electron Corporation | Gas-fired steam cooker |
FR2791125A1 (en) * | 1999-03-17 | 2000-09-22 | Electrolux Zanussi Grandi Impi | COOKING OVEN WITH GAS HEATED STEAM GENERATOR |
JP2001033039A (en) * | 1999-07-23 | 2001-02-09 | Tokyo Gas Co Ltd | Steam cooking device |
US6237469B1 (en) * | 2000-05-03 | 2001-05-29 | Crown Food Service Equipment Ltd. | Gas powered pressureless steam cooker |
DE10347161A1 (en) * | 2003-10-02 | 2004-09-02 | Wiesheu Gmbh | Thermal handling device for food, has atomizer runner which atomizes and ejects liquid through outlets using centrifugal force |
DE202004015288U1 (en) | 2004-10-01 | 2006-02-09 | Wss Gmbh | Device to disperse exhaust gases from cooker combustion chamber has downstream heat exchanger, in hot air steam or microwave device for heating food, and circulation blower whereby combustion chamber is formed as dispersing exhaust chamber |
EP1772669A2 (en) | 2005-10-07 | 2007-04-11 | Société Coopérative de Production Bourgeois | Steam heating and production device for an oven |
WO2008035898A1 (en) * | 2006-09-19 | 2008-03-27 | Ho Youl Shin | Steam generator |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2839546B1 (en) * | 2002-05-07 | 2006-09-22 | Premark Feg Llc | OVEN FOR COOKING FOOD |
-
2011
- 2011-01-19 FR FR1150425A patent/FR2970559A1/en not_active Withdrawn
-
2012
- 2012-01-17 EP EP12151474A patent/EP2479500A1/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE705875A (en) * | 1965-10-21 | 1968-03-01 | ||
US4552123A (en) * | 1984-12-12 | 1985-11-12 | Thermo Electron Corporation | Gas-fired steam cooker |
FR2791125A1 (en) * | 1999-03-17 | 2000-09-22 | Electrolux Zanussi Grandi Impi | COOKING OVEN WITH GAS HEATED STEAM GENERATOR |
JP2001033039A (en) * | 1999-07-23 | 2001-02-09 | Tokyo Gas Co Ltd | Steam cooking device |
US6237469B1 (en) * | 2000-05-03 | 2001-05-29 | Crown Food Service Equipment Ltd. | Gas powered pressureless steam cooker |
DE10347161A1 (en) * | 2003-10-02 | 2004-09-02 | Wiesheu Gmbh | Thermal handling device for food, has atomizer runner which atomizes and ejects liquid through outlets using centrifugal force |
DE202004015288U1 (en) | 2004-10-01 | 2006-02-09 | Wss Gmbh | Device to disperse exhaust gases from cooker combustion chamber has downstream heat exchanger, in hot air steam or microwave device for heating food, and circulation blower whereby combustion chamber is formed as dispersing exhaust chamber |
EP1772669A2 (en) | 2005-10-07 | 2007-04-11 | Société Coopérative de Production Bourgeois | Steam heating and production device for an oven |
WO2008035898A1 (en) * | 2006-09-19 | 2008-03-27 | Ho Youl Shin | Steam generator |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103196163A (en) * | 2013-04-12 | 2013-07-10 | 西北工业大学 | Totally-enclosed impact heat exchange gas cooker |
Also Published As
Publication number | Publication date |
---|---|
FR2970559A1 (en) | 2012-07-20 |
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