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WO2004016987A1 - Bruleur a corps poreux et appareil de cuisson contenant au moins un bruleur a corps poreux - Google Patents

Bruleur a corps poreux et appareil de cuisson contenant au moins un bruleur a corps poreux Download PDF

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Publication number
WO2004016987A1
WO2004016987A1 PCT/DE2003/002476 DE0302476W WO2004016987A1 WO 2004016987 A1 WO2004016987 A1 WO 2004016987A1 DE 0302476 W DE0302476 W DE 0302476W WO 2004016987 A1 WO2004016987 A1 WO 2004016987A1
Authority
WO
WIPO (PCT)
Prior art keywords
pore burner
pore
gas
burner
air
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.)
Ceased
Application number
PCT/DE2003/002476
Other languages
German (de)
English (en)
Inventor
Karlheinz Berstecher
Franz Koch
Manfred Lichtenstern
Rainer Otminghaus
Stefan Rusche
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rational AG
Original Assignee
Rational AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rational AG filed Critical Rational AG
Priority to EP03787723A priority Critical patent/EP1523641B1/fr
Priority to DE50305860T priority patent/DE50305860D1/de
Priority to JP2004528427A priority patent/JP2006501428A/ja
Priority to US10/522,455 priority patent/US20060035189A1/en
Priority to DE202004001084U priority patent/DE202004001084U1/de
Publication of WO2004016987A1 publication Critical patent/WO2004016987A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F24C3/08—Arrangement or mounting of burners
    • F24C3/085—Arrangement or mounting of burners on ranges
    • F24C3/087—Arrangement or mounting of burners on ranges in baking ovens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F23C99/006—Flameless combustion stabilised within a bed of porous heat-resistant material
    • 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
    • F23D14/12—Radiant burners
    • F23D14/16—Radiant burners using permeable blocks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F23D2203/1012—Flame diffusing means characterised by surface shape tubular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/105—Porous plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2207/00—Ignition devices associated with burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/20—Burner material specifications metallic
    • F23D2212/201—Fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2213/00—Burner manufacture specifications
    • 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
    • F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet
    • 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
    • F23D2900/00019—Outlet manufactured from knitted fibres

Definitions

  • Pore burner and cooking appliance containing at least one pore burner
  • the present invention relates to a pore burner, in particular for cooking appliances, comprising a housing having at least one inlet for a gas / air mixture as fuel and / or at least one inlet for air and / or at least one inlet for gas and / or at least one outlet for Having air and / or gas and / or exhaust gases, and a cooking appliance, containing at least one pore burner.
  • the invention relates to a pore burner system and the use of pore burners and pore burner systems for heat and / or steam generation in cooking appliances and heaters, and finally this cooking and heating appliances.
  • Pore burners are well known to those skilled in the art. This is generally a burner with a given combustion chamber volume with spatially contiguous cavities, over which or in which a defined flame zone is formed. Embodiments of known pore burners are described, for example, in US Pat. No. 5,522,723, WO 95/01532, DE 199 39 951 A1 and DE 199 04 921 C2. With the help of pore burners, for example, the size of industrial as well as domestic steam or hot water boilers can be reduced, since the heat energy is emitted both by radiation and by heat conduction, whereby the convective portion of the heat transfer decreases.
  • DE 199 04 921 C2 describes a housing container which, in addition to a radiation heat exchanger and a convection heat exchanger, also comprises a porous burner which is suitable for heating liquids.
  • DE 198 04 267 AI there is a equipped with a pore burner large water boiler for the production of steam and / or hot water.
  • Packed beds according to DE 199 39 951 A1 accordingly have at least two zones of bulk material with different pore sizes.
  • WO 95/01532 also addresses the problem of producing a stable flame at low temperature and low pollutant emission. This document can be seen to change the porosity of the pore burner along the combustion chamber such that the pore size increases in the direction of flow of the gas / air mixture from the inlet to the outlet.
  • the porous material of the pore burner used is again obtained by bulk material, for example in the form of loosely layered grains, which are solidified in a sintering process.
  • basic embodiments of pore burner technology are described in EP 0 840 061 A1 and in DE-OS 2 211 297.
  • the reactions underlying the flame formation between the fuel gas and the oxidizing agent regularly or predominantly take place within the porous matrix. Accordingly, the hot reaction products flow out of the combustion cavities without flame formation.
  • This procedure entails that the flames are cooled by the burner material, which helps prevent further flame propagation and flashback.
  • the burner masses and the burner loads are very small, it may still come to a flashback. This is the case regularly, for example, when high temperatures are present even in the combustion chamber in compact heaters due to high ambient temperatures. A flashback can then often only achieve a sufficient flame cooling. However, this requires a large mass with high heat capacity and good thermal conductivity.
  • the described pore burner devices also have in common that optimized gas homogenization and gas distribution over the burner surface as well as sufficient flame stability and dimensional stability of the surface are generally only possible by using a plurality of components of different geometries and / or materials.
  • Suitable flat flame burners based on pore burners have hitherto been known only in the form of sintered disks, for example as flat-flame burners of the so-called "Kaskan type” (according to WE Kaskan, "The dependence of fiame temperature on mass burning velocity", 6 th Symp on Combustion, The Williams & Wilkins Company, Baltimore, 1956, pages 134-143).
  • a high degree of flame stability, the prevention of flashback and the guarantee of a uniform and constant flame front in a flat flame burner can be regularly obtained only with a porous material of high homogeneity, otherwise a generally uneven flow profile results.
  • a porous matrix with sufficiently high homogeneity can usually only be realized up to a predetermined component size. For larger sized burner systems are therefore regularly compromise on a uniform flow profile and the associated properties to take into account.
  • Conventional vollvormischende burners are so far generally constructed of sheets, which are provided with hole and / or slit patterns, for example, as known from burners in cylindrical Brennkammem.
  • Known surface burners may also consist of a flexible wire mesh fastened to a support structure, perforated ceramics or wire mesh.
  • gas homogenization and gas distribution as well as flame stability and form stability are required. The quality of the surface also always combines a number of components made of different geometries and materials.
  • pore burners are also often characterized by the fact that when using fully premixed gas / air mixtures can be implemented very different compositions and very variable flow rates at low surface load. In particular, when a homogeneous gas mixture is used, one obtains very low exhaust emissions.
  • ignition by spark ignition often fails. Even with the spark ignition under the previously described conditions, the energy introduced by the spark due to the desired stabilization of the reaction zone in the vicinity of the porous material is often sufficient only for a local ignition of the gas mixture. Released heat of reaction is absorbed by the surrounding material, whereby the gas mixture in the ignition zone is deprived of energy and the chain branching reactions required for flame formation are prevented.
  • the present invention was thus based on the object of making pore burners accessible in particular for cooking appliances or further developing the generic pore burners such that they are no longer subject to the disadvantages of generic pore burners and, in particular, a high degree of flame stability and homogeneity, in particular also Design as surface burner or flat flame burner, grouting. Accordingly, the present invention further has the object of further developing generic cooking devices such that they can be eco-efficiently and constantly heated with a high energy efficiency with the lowest possible operating costs. Finally, the present invention has the object to provide a pore burner available that ensures reliable, improved ignition regardless of the energy content of the fuel mixture or the condition of the pore burner and helps to avoid delayed ignition.
  • pore burner with a housing having sintered metal powder and / or, in particular pressed, Metalldrahtgestrick in the form of at least one dimensionally stable, porous shaped body, on the surface and / or in the pore spaces reaction zones of the flame development to form a surface burner. Accordingly, even the entire shaped body surface as such, due to the porous structure, the outlet, the pore burner according to the invention, optionally also without a defined, large-area outlet, z. B. at one end of the housing.
  • the pore burner according to the invention regularly has at least one inlet for a gas / air mixture as fuel.
  • the pore burner or the housing of the porous burner may have at least one further inlet for air and / or a further inlet for gas.
  • separately supplied air can be used as secondary air or for cooling components of the pore burner.
  • so-called fully premixing burner systems in particular also in cooking appliances, are used.
  • the pore burner according to the invention can be used, for example, for generating heat and / or steam in cooking appliances, in particular gas-fired cooking appliances, and furthermore also in heaters such as boilers or gas heaters, eg in building services, especially when using cylindrical Brennkammem.
  • Porous burners according to the invention which are used in cooking appliances may be partially pre-mixing and, in particular, fully premixed pore burners.
  • the burner may be e.g. represent a, in particular cylindrical, tube, which is preferably closed at its end. Has proven particularly well the attachment of distributed on the circumference of the tube present gas outlet openings.
  • the shaped body is essentially a hollow body, in particular a hollow cylinder.
  • Suitable hollow bodies may further have any geometric shapes, e.g. represent in cross section an ellipse, a triangle, a square, a rectangle or any polygon.
  • Suitable hollow bodies can also completely dispense with a defined, large-area outlet opening and, e.g. be designed as an ellipse, sphere or cylinder with only at least one defined opening for the inlet of the gas / air mixture.
  • the use of hollow bodies makes it possible in a simple manner to create the largest possible surface area for a uniform flame front.
  • the molded body comprises at least one mounting and / or fastening element, in particular a groove, a spring, a flange and / or a thread.
  • Holding and fastening elements can thus be integrated with the pore burners according to the invention already in the dimensionally stable shaped body, for example of pressed metal wire knit, whereby the manufacturing cost of the pore burner according to the invention can be reduced and a production is much easier to implement for mass production.
  • the dimensionally stable shaped body can also be easily welded for attachment, for example to the tube for supplying the fuel mixture.
  • both the tube and the dimensionally stable shaped body have matching cross sections and, for example, the shaped body is of cylindrical design and the tube has a circular cross section.
  • Particular advantages in terms of handling and minimization of the components result from the fact that the mounting and fastening means is incorporated directly into the porous molding material of the pore burner. For example, a thread can be screwed into the pore body. Consequently, there is no need for additional mounting or fastening means and no connection technology for coupling the same to the pore burner.
  • pore burners comprising at least two, at least partially positively fitting abutting moldings, which are in particular partially, preferably joined together to form a groove.
  • abutting moldings which are in particular partially, preferably joined together to form a groove.
  • Two or more joined moldings can form a stable connection via a phase or a groove. It is particularly advantageous if the adjacent moldings, for example via groove / spring structures, flush and firmly connected to each other or can be plugged into each other, without the need for additional fasteners.
  • the dimensionally stable molded bodies in particular hollow bodies, are formed at their respective end regions or top surfaces such that they correspond in shape with one another, so that, for example, the front region of a molded body fits as precisely as possible into the rear region of another molded body , in particular of such an identical type, inserts.
  • the porous burner according to the invention can be converted as such in a stable form or present in a stable form, which is configured such that two or more such porous burner to be used for connecting.
  • adjacent pore burner segments to be connected to one another may be configured at their sections to be coupled in such a way that they can be put on one another without the need for further fastening means.
  • the open end section of a pore burner segment can be equipped with at least one groove, which can be accurately connected to an end section of an adjacent pore burner segment provided with at least one spring.
  • the dimensional stability of the pore burners used is already achieved during their production via the sintering of metal powder and the pressing of metal wire knits, without the need for further mechanical support elements.
  • pore burners via groove / spring elements which correspond to one another
  • three or more pore burners or pore burner segments can be coupled to one another with the formation of a uniform pore burner via the aforementioned connection technique.
  • the tail of this combined pore burner preferably has a closure, for example in the form of porous burner material, so that the pore burner has no outlet opening.
  • a one-piece pore burner as well as a pore burner segment can be designed, for example, both cylindrically and conically. The same applies to a pore burner formed from several pore burner segments. In this case, the pore burner preferably tapers in the direction of the end thereof.
  • the material densities of at least two adjoining Formgro ⁇ ern substantially match.
  • the material density in the region of the junction of two joined moldings essentially corresponds to the material density of at least one of these Formgro ⁇ er.
  • the surface of the molded body has at least one irregularity, in particular at least one indentation and / or elevation, which deviates from the base of the molded body.
  • Indentations and / or elevations ie irregularities in the surface of the molded body is regularly prevented from forming a substantially two-dimensional reaction zone.
  • the surface of dimensionally stable, in particular pressed, metal wire knits is generally sufficiently irregular in order to suppress the described resonance phenomena, but of course may also have different strengths.
  • an embodiment provides that the wall thickness of a molded body varies and in particular has at least two different thicknesses.
  • the wall thickness of a hollow body accordingly does not have to be constant within the same in this embodiment.
  • Preferred pore burners in the context of the present invention are flat flame burners.
  • Particularly preferred pore burners are characterized in that the molded body at least in regions, in particular in the region of a metal wire knitted fabric, a pressed density in the range of about 2.5 to about 5 g / cm, in particular from about 2.8 to about 4.5 g / cm. Lower densities generally require lower fan powers because of lower pressure drops, whereas with higher densities more uniform reaction zones can be achieved.
  • the wire diameter of the metal wire knitted fabric is in the range from about 0.1 to about 0.4 mm, in particular from about 0.16 to about 0.28 mm.
  • the porosity of the pore burners on the basis of pressed wire knit fabrics according to the invention can also be influenced by the wire thickness, ie the wire diameter, and / or the number of wires in the knitted fabric.
  • the wire mesh only consists of a relatively thick wire
  • the pore burner generally has relatively large pores with a substantially matching pore size. If, for example, three wires with smaller diameters are used, for example, pores of different sizes are generally obtained with the same press density, but these are generally on average below the previously described embodiment.
  • the metal wire knit is present in axial or radial wound prior to the loading.
  • pore burners according to the present invention are preferred with which surface loads in the range from 20 to 300 W / cm, in particular from 30 to 260 W / cm, are accessible. Accordingly, in the pore burners of the present invention, even at 200 W / cm and more, the flame does not decrease.
  • the maximum surface load is often not limited by the wire mesh, but by the flow rate of the air and / or gas supply.
  • the surface load lower limit is regularly formed by extinguishing the flame as a result of high heat conduction by the application to the metallic surface.
  • the pore burner according to the invention allows a very wide range of possible operating states between the flame extinguishing on the one hand and the Flammenabriol other hand, and thus a power modulation range of 1: 5 and more.
  • the metal powder and / or the metal wire mesh comprise or comprise at least one metal and / or metal alloy which forms an oxide layer, in particular a metal alloy containing chromium and / or aluminum.
  • Suitable metals and metal alloys for the metal powders to be sintered and in particular for the wire knits are preferably heat-resistant materials, for example heat-resistant steels. These include z. High alloy steels such as low-carbon austenitic chromium, nickel and manganese steels. As an example, reference is made to the heat-resistant steel 1.4828 (XI 5 CrNiSi 20-12).
  • metals or metal alloys that can form an oxide layer on their surface, whereby the molded body can be equipped with a protective layer.
  • Particularly suitable metal alloys have aluminum or / and chrome components or are composed of these metals.
  • a suitable material provides z. B. the alloy with the material lobster 1.4767 (CrAl 20 5) and the alloys with the material number 1.47675 represents.
  • a pore burner which has at least one distributor device for targeted alignment of a portion of the gas and / or air stream and / or the gas / air mixture stream, the at least partially in Hohlkö ⁇ er the pore burner so arranged and / or ausformbar is that a part of the air and / or gas stream or the gas / air mixture stream can be distributed in such a way that the inner wall of the Hohlkö ⁇ ers, in particular in the region of the distributor undergoes an inhomogeneous pressure distribution.
  • the apparatus of the invention succeeds in diverting a portion of the gas / air mixture stream selectively to a region of the inner wall of the pore burner hollow body. This selected area on the inner wall, the gas / air mixture is supplied with a greater pressure than surrounding areas of the Hohlkö ⁇ ers.
  • the distribution device is a guide plate.
  • the distribution device comprises essentially metallic and / or ceramic materials and is made for example of stainless steel.
  • the distribution device may e.g. in the form of a plate or a three-dimensional structure, z. As a wedge, at least partially present in the Hohlkö ⁇ er, as long as it is ensured that the entering into the Hohlkö ⁇ er gas is proportionately deflected to a region of the inner wall of the Hohlkö ⁇ ers.
  • the distributor may be e.g. around an oblique, i. at an angle in the Hohlkö ⁇ er protruding, arbitrarily shaped Ablenk two. Act deflection structure.
  • the distribution device in particular the baffle, not only have a flat deflection or deflection, but be arbitrarily shaped, provided that the attachment and / or shape of the distribution device allows a partial deflection, as shown above, of the incoming fuel gas.
  • the distributor or the baffle may have a round, oval or angular cross-section.
  • the cross-sectional shape of the distributor device can always be readily adapted to the cross-sectional shape of the porous burner body.
  • the distribution device or the guide plate can be kinked, annular, stepped or curved.
  • the distributor or the baffle has at least one passage or an opening.
  • the size of the passages in the distribution device in particular during pore burner operation, can be varied. In this way it is possible, for example, to respond immediately to changes in the composition of the fuel mixture to ensure a continuous, consistent flame formation over the entire pore burner.
  • the pore burners according to the invention can furthermore have at least one burner tube for air and / or gas, which can be connected to an inlet of the pore burner. This burner tube is generally part of the supply line.
  • the distribution device may be present in sections in the hollow body, as well as in the burner tube, or in each case be completely present or mounted in the same.
  • the distribution device is at least partially attachable to the burner tube and / or the Hohlkö ⁇ er. In general, it is sufficient if the distributor is attached via one or two welds on the inside of the burner tube.
  • a further advantageous embodiment is characterized in that the deflection surface of the distribution device, in particular of the guide plate, relative to the central axis of the Hohlkö ⁇ ers, in particular the hollow cylinder, is inclined.
  • the Porenbrennerhohlkö ⁇ ers preferred, d. H. to supply with a higher pressure with the fuel mixture.
  • the distribution device may also have a blade shape or be configured bent.
  • a further embodiment of the invention has pore burner systems for the subject, the at least one pore burner according to the invention and at least one feed tube for Air and / or gas, which is connectable to an inlet of the pore burner, and / or at least one ignition device comprises.
  • At least one inlet of a dimensionally stable Formkö ⁇ ers via a mounting and / or a fastener, in particular a flange and / or thread, with at least one supply pipe and / or burner tube for air and / or gas is connected.
  • At least one inlet of a dimensionally stable Formkö ⁇ ers is at least partially welded to at least one supply pipe and / or burner tube for air and / or gas.
  • the ignition device is arranged in the region of the outside of the hollow body in the region on whose corresponding inner side the distributor device has the smallest distance. Accordingly, the igniter, e.g. Ignition electrode, preferably in front of where the redirected fuel gas mixture exits the Porenbrennerwandung so that regularly with the first spark the flame is ignited. After that, the reaction front spreads steadily.
  • the igniter e.g. Ignition electrode
  • the object is further solved by a cooking appliance, in particular a gas-fired cooking appliance containing at least one pore burner, in particular a pore burner according to the invention or a pore burner system according to the invention.
  • a cooking appliance are those with closed as well as open systems into consideration.
  • gas-fired cooking appliances in particular those with a pore burner, which acts as a surface burner or flat flame burner, resorted to.
  • It can Kleinstgarella, eg modegarella, as well with pore burners, in particular pore burners according to the invention, be equipped as large-scale cooking appliances, for example, used in commercial kitchens.
  • Suitable fields of use for the pore burners according to the invention are, for example, steam cooking appliances or so-called combi steamers.
  • the pore burners according to the invention a very high degree of flame stability is achieved. At the same time, flashback is substantially completely prevented.
  • pore burners are provided with a porous material of high homogeneity and uniform flow profile, which as a surface burner continuously have a uniform and constant flame front and are particularly suitable as a flat flame burner.
  • a quasi-two-dimensional, flat flame is maintained over the entire burner surface.
  • the cooking devices according to the invention have a very high efficiency and can be extremely eco-efficient, so for example, resource-saving and low emission, operate.
  • the heat input is very uniform and can also be regulated and controlled in a direct and simple manner.
  • the properties described above can also be realized with cooking devices according to the invention, which are small in size.
  • the cooking devices according to the invention can be used both in commercial kitchens, eg for canteen operation, as well as in restaurants and restaurants. Garella with housed surface burners are thus readily available.
  • the present invention was based on the surprising finding that at least a portion of the introduced or injected gas / air mixture is selectively supplied to a specific area of the inner wall of this Hohlkö ⁇ ers using a mounted in the interior of a Porenbrennerhohlkö ⁇ ers distribution or guide device.
  • a Porenbrennerhohlkö ⁇ ers distribution or guide device In this way can be reliably achieve a supply of fuel, which is always sufficient to be ignited with a spark.
  • pore burners can be ignited properly regardless of their initial state and regardless of the quality of the gas / air mixture.
  • the gas / air mixture predominantly passes out within a defined range through the porous Hohlkö ⁇ er, already can be started and maintained over a conventional ignition device which is mounted in the region of the preferred fuel outlet, the reaction.
  • the pore burner according to the invention works flawlessly and reliably under a variety of reaction conditions.
  • Another advantage is that no compromises have to be made with regard to the compact design of pore burners. So it is of particular advantage that the distance between the surface of the pore burner and the Brennschgrenzung can be kept very low. This was not easy to achieve with conventional burner types, since a reduction in distance is always accompanied by increased flow velocities, which have hitherto frequently increased . have led to extinguishment of the flames. In addition, a consistently high level of I 7 lameness stability is achieved as well as flame retardation substantially completely prevented.
  • Figure 1 shows the schematic structure of a cooking appliance according to the invention, comprising a pore burner
  • Figure 2 shows a hollow cylindrical pore burner in cross section
  • Figure 3 is a schematic perspective view of a pore burner according to the invention.
  • Figure 4 is a schematic cross-sectional drawing of the porous burner according to Figure 3.
  • FIG. 5 shows a further schematic cross-sectional view of the pore burner according to FIG.
  • the cooking appliance 1 shown in Figure 1 comprises an interior 2 with a pore burner 4 according to the invention for the production of hot air.
  • a pore burner 4 for the production of hot air.
  • each pore burner 4 comprises a sensor, not shown, in the form of an ionization current sensor and in each case an ignition device, not shown.
  • the pore burner 4 is supplied with fuel gas or a fuel gas mixture via a supply line 6 with the interposition of a first gas valve (not shown). This gas valve assumes the functions of pressure control, quantity adjustment and, if necessary, gas filtration.
  • the pore burner 4 is formed as a hollow cylinder and has at one end via a thread which is integrally integrated in the forming the Porengro ⁇ er body (not shown). About this thread, the in , the present embodiment as a pressed wire mesh present dimensionally stable
  • FIG. 2 shows a schematic representation of a porous burner 4 'in cross-section.
  • the wall 10 of the hollow cylindrical Formkö ⁇ ers 7 'of the pore burner 4' has irregularities 12 and 14 in the surface 16 of the molded body, which goes back to a different thickness of Formgro ⁇ ernwandung 10.
  • the irregularities 12 and 14 of the Formkö ⁇ ers 7 ' are formed as grooves that can interlock with each other, can be created with these Formkö ⁇ ern 7', which can form-fit together, larger-sized pore burner.
  • the groove 12 engages a first Formgro ⁇ ers 7 'in the groove 14 of a second Formgro ⁇ ers 7', the free groove 12 in turn can be combined with the groove 14 of a third Formgro ⁇ ers 7 'under positive engagement.
  • FIG. 3 shows an alternative pore burner system 3 'according to the invention comprising a pore burner 4 "according to the invention with a burner tube 24, a feed tube 26 connected thereto and a flange 28 which is connected directly to the feed tube 26.
  • the flange 28 has a plurality of screw holes 34
  • a holder 36 for the ignition source 22 is also mounted on the flange 28.
  • the baffle 100 protrudes into it.
  • This baffle 100 is arranged such that it supplies at least a portion of the over the supply pipe 26 and the burner tube 24 into the interior of the pore burner 4 "reaching gas / air mixture targeted a defined region of the inner wall of the pore burner 4".
  • the guide plate 100 it is already sufficient for the guide plate 100 to be inclined in the direction of the inner wall of this hollow cylinder with respect to the central axis of the hollow-cylindrical porous burner 4.
  • a substantially rectangularly shaped guide plate 100 may be slanted into the interior of the hollow cylinder, as shown in FIG.
  • the baffle 100 also partially present in the burner tube 24 or there is attached, the gas / air mixture arriving via the supply pipe is channeled in parts at an early stage in the direction of the desired region of the inner wall of the pore burner. In this way, ignition in an early section of the pore burner body is completely unproblematic.
  • the baffle 100 may also be arranged to be movable or rotatable within the hollow cylinder.
  • the ignition source 22 mounted on the holder 36 may be rotatably mounted, so that it is to be brought to the outside of the pore burner 4 "only in the case of ignition.
  • FIG. 4 shows a sectional view of the pore burner system 3 'or pore burner 4 "shown in FIG. 3. It can be seen here that the baffle 100 already begins in the burner tube 24 and extends into the interior of the pore burner 4".
  • the guide plate 100 is accordingly preferably fastened in the region of the burner tube 24.
  • the gas / air mixture introduced via the supply pipe 26 impinges on the guide plate 100 in the burner tube 24 and is diverted by it proportionately in the direction of an inner wall region of the porous burner 4 ".
  • FIG 3 shows a schematic cross-sectional side view of the pore burning system 3 'or pore burner 4 "according to FIG 3.
  • the guide plate 100 is arranged inclined in the same direction both in the burner tube 24 and in the pore burner, for which a uniform angle, for example in the range of 20 to 25 ° C.
  • the pore burner 4 " has a groove 18 incorporated in the pore burner material in the connection region with the burner tube, which is already sufficient to ensure a reliable connection to the burner tube 24 ,
  • a gas mixture can be such that it comes to a localized pressure increase in the region of the inside of the pore burner present as Hohlkö ⁇ er.
  • This construction is also advantageous for maintaining a flame in a cold burner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Abstract

Brûleur à corps poreux, en particulier pour appareils de cuisson, qui comporte un boîtier pourvu d'au moins un orifice d'entrée pour un mélange gaz / air en tant que combustible et / ou d'au moins un orifice d'entrée d'air et / ou d'au moins un orifice d'entrée de gaz et / ou d'au moins un orifice de sortie d'air et / ou de gaz et / ou de gaz d'échappement. Ledit boîtier est constitué de poudre métallique frittée et / ou d'un treillis de fil métallique, en particulier pressé, sous forme d'au moins un corps poreux moulé à stabilité de forme à la surface duquel et / ou dans les pores duquel se trouvent des zones de réaction de développement de flamme pour la formation d'un brûleur plat. La présente invention concerne en outre un brûleur à corps poreux pourvu d'au moins un dispositif de répartition en vue de l'orientation ciblée d'une partie du flux de gaz et / ou d'air et / ou du flux du mélange gaz / air, ledit dispositif étant au moins partiellement placé ou moulé dans le corps creux de manière telle qu'une partie du flux d'air et / ou de gaz ou qu'une partie du flux du mélange gaz / air peut être réparti de façon que la paroi interne du corps creux soit soumise à une répartition non homogène de la pression, en particulier dans la zone du dispositif de répartition.
PCT/DE2003/002476 2002-07-23 2003-07-23 Bruleur a corps poreux et appareil de cuisson contenant au moins un bruleur a corps poreux Ceased WO2004016987A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP03787723A EP1523641B1 (fr) 2002-07-23 2003-07-23 Bruleur a corps poreux et appareil de cuisson contenant au moins un bruleur a corps poreux
DE50305860T DE50305860D1 (de) 2002-07-23 2003-07-23 Porenbrenner sowie gargerät, enthaltend mindestens einen porenbrenner
JP2004528427A JP2006501428A (ja) 2002-07-23 2003-07-23 多孔質バーナー、及び少なくとも１つの多孔質バーナーを含む調理器具
US10/522,455 US20060035189A1 (en) 2002-07-23 2003-07-23 Pore burner and cooking appliance containing at least one pore burner
DE202004001084U DE202004001084U1 (de) 2003-07-23 2004-01-23 Brennersystem für ein Gargerät mit Steck- und Schraubverbindung und Gargerät, mit zumindest einem solchen Brennersystem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10233340.8 2002-07-23
DE10233340A DE10233340B4 (de) 2002-07-23 2002-07-23 Porenbrenner sowie Gargerät, enthaltend mindestens einen Porenbrenner

Publications (1)

Publication Number Publication Date
WO2004016987A1 true WO2004016987A1 (fr) 2004-02-26

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PCT/DE2003/002476 Ceased WO2004016987A1 (fr) 2002-07-23 2003-07-23 Bruleur a corps poreux et appareil de cuisson contenant au moins un bruleur a corps poreux

Country Status (5)

Country Link
US (1) US20060035189A1 (fr)
EP (1) EP1523641B1 (fr)
JP (1) JP2006501428A (fr)
DE (2) DE10233340B4 (fr)
WO (1) WO2004016987A1 (fr)

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DE102005057238A1 (de) * 2005-11-29 2007-05-31 Pennekamp Gmbh Vorrichtung zum Beheizen von Ofenanlagen
DE102008053959A1 (de) 2008-10-30 2010-05-06 Rational Ag Brenner und Nahrungsmittelbehandlungsgerät mit einem solchen Brenner
WO2010012493A3 (fr) * 2008-07-31 2011-01-27 Jaroslav Klouda Système échangeur de chaleur, ainsi qu'appareil chauffé au gaz équipé de ce système

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DE102004062185C5 (de) * 2004-12-23 2013-09-26 Elco Burners Gmbh Haltevorrichtung zum Anbringen eines Gebläsebrenners an einem Brennraumgehäuse
US20060207749A1 (en) * 2005-03-18 2006-09-21 Jaffe Limited Multi-layer wick structure of heat pipe
DE102006013445A1 (de) * 2006-03-17 2007-09-20 Gvp Gesellschaft Zur Vermarktung Der Porenbrennertechnik Mbh Walze mit Heizvorrichtung
DE102008032833A1 (de) * 2008-07-14 2010-01-21 Rational Ag Nahrungsmittelbehandlungsgerät
GB0821260D0 (en) * 2008-11-21 2008-12-31 Advanced Comb Engineering Ltd A radiant gas burner assembly
ITBO20110281A1 (it) * 2011-05-18 2012-11-19 Riello Spa Bruciatore premiscelato
JP6029857B2 (ja) * 2012-05-23 2016-11-24 株式会社パロマ 濃淡バーナ
US9464805B2 (en) * 2013-01-16 2016-10-11 Lochinvar, Llc Modulating burner
JP6874325B2 (ja) * 2016-10-27 2021-05-19 株式会社ノーリツ 温水装置
MX2019014710A (es) * 2017-06-08 2020-02-07 Rheem Mfg Co Quemadores optimizados para aplicaciones de caldera.

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005057238A1 (de) * 2005-11-29 2007-05-31 Pennekamp Gmbh Vorrichtung zum Beheizen von Ofenanlagen
DE102005057238B4 (de) * 2005-11-29 2011-11-10 Pennekamp Gmbh Ofenanlage für Waren, insbesondere für Glaswaren und Verfahren zum Betreiben dieser
WO2010012493A3 (fr) * 2008-07-31 2011-01-27 Jaroslav Klouda Système échangeur de chaleur, ainsi qu'appareil chauffé au gaz équipé de ce système
DE102008053959A1 (de) 2008-10-30 2010-05-06 Rational Ag Brenner und Nahrungsmittelbehandlungsgerät mit einem solchen Brenner

Also Published As

Publication number Publication date
EP1523641A1 (fr) 2005-04-20
EP1523641B1 (fr) 2006-11-29
DE10233340B4 (de) 2004-07-15
JP2006501428A (ja) 2006-01-12
US20060035189A1 (en) 2006-02-16
DE50305860D1 (de) 2007-01-11
DE10233340A1 (de) 2004-03-04

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