EP1571398B1 - Cooking appliance with sound insulated burner system - Google Patents

Cooking appliance with sound insulated burner system Download PDF

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Publication number
EP1571398B1
EP1571398B1 EP20050004385 EP05004385A EP1571398B1 EP 1571398 B1 EP1571398 B1 EP 1571398B1 EP 20050004385 EP20050004385 EP 20050004385 EP 05004385 A EP05004385 A EP 05004385A EP 1571398 B1 EP1571398 B1 EP 1571398B1
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EP
European Patent Office
Prior art keywords
cooking appliance
range
appliance according
supply device
air
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Application number
EP20050004385
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German (de)
French (fr)
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EP1571398A3 (en
EP1571398A2 (en
Inventor
Manfred Lichtenstern
Stefan Dr. Rusche
Reiner Otminghaus
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Rational AG
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Rational AG
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Publication of EP1571398A3 publication Critical patent/EP1571398A3/en
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Classifications

    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2210/00—Noise abatement

Definitions

  • the present invention relates to a cooking appliance according to the preamble of claim 1.
  • Cooking appliances used in commercial kitchens or restaurants are regularly gas-operated and often have more than one burner unit. Furthermore, such cooking appliances are usually equipped with heat exchanger tubes and at least one fan to enter the heat generated, for example in the form of water vapor, in the cooking chamber and to circulate there.
  • Such cooking appliances are eg from the not previously published WO 2004/020907 or the German utility model DE 202 01 184 U1 known.
  • the operation of the burner and blower can already generate a considerable noise level, which is perceived as unpleasant by the operating personnel and may even lead to an impairment of the concentration in the workplace.
  • fluid flows in pipelines sometimes also generate considerable noise, so that the entire soundscape generated by a cooking appliance in operation, especially when several such cooking appliances are used side by side, is perceived as disturbing.
  • the DE 101 44 972 C1 is a soundproofed air hose, such as is present in a motor vehicle between a radiator and the air filter, obtained by having between two members of acoustically substantially dense material at least one opening for sound attenuation, which is arranged in the region of the impedance change between two adjacent members.
  • Such an air hose is according to the DE 101 44 972 C1 cost-effective and yet has sound-reducing properties.
  • openings are provided in the wall of an air hose at the points at which the radiator connection piece goes into a bellows and this bellows in turn into an air filter connection piece. This approach is tailored exclusively to the sound reduction of radiator hoses in motor vehicles, which is why the DE 101 44 972 C1 no further information on other possible uses can be found.
  • a generic cooking appliance with a sound-damped burner system is in particular from the GB 2 266 137 A known.
  • a flame control device is used which, inter alia, comprises a noise reduction device in the form of holes in the region of the burner body.
  • This noise reduction device is thus responsible exclusively for the modulation of the flame noise and is associated with the disadvantage that combustion gases and / or unconsumed combustion air in the interior of a cooking appliance, in particular the cooking chamber, can occur, which in turn can lead to undesirable Garfedern.
  • the present invention therefore an object of the invention, the generic cooking appliance further develop such that the disadvantages of the prior art are overcome.
  • the disadvantages of the prior art are overcome.
  • a generic cooking appliance solves this task erfindunshunte by the features of the characterizing part of claim 1.
  • Preferred cooking appliances according to the invention are described in claims 2 to 9.
  • the present invention was based on the surprising finding that the noise level in the operation of cooking devices can be considerably reduced even by the provision of perforation openings in supply lines located upstream of a burner. In particular, this noise can be significantly suppressed when starting a burner. In this way, a much more pleasant and in particular safe working in e.g. Commercial kitchens possible.
  • Another advantage is that even conventional cooking appliances can be equipped or retrofitted with a sound-damped burner systems, whereby the extent of new investments can be kept low.
  • adjacent perforation openings are arranged transversely to the flow direction, for example the combustion air, in the supply line, ie the fluid or a fluid front reaches both or all perforation openings substantially at the same point in time.
  • perforation openings 54 ', 56' in a nozzle 62 ' which is formed as an elbow and part of a second supply line 58' for supplying combustion air to a burner, not shown, a cooking appliance, provide.
  • This nozzle can then easily connect, for example, to an air collector, not shown.

Description

Die vorliegende Erfindung betrifft ein Gargerät nach dem Oberbegriff von Anspruch 1.The present invention relates to a cooking appliance according to the preamble of claim 1.

In Großküchen oder Restaurantbetrieben eingesetzte Gargeräte sind regelmäßig gasbetrieben und verfügen häufig über mehr als eine Brennereinheit. Des weiteren sind solche Gargeräte in der Regel mit Wärmetauscherrohren und mindestens einem Gebläse ausgestattet, um die erzeugte Wärme, beispielsweise in Form von Wasserdampf, in den Garraum einzutragen und dort zirkulieren zu lassen. Derartige Gargeräte sind z.B. aus der nicht vorveröffentlichten WO 2004/020907 oder dem deutschen Gebrauchsmuster DE 202 01 184 U1 bekannt. Bereits durch den Betrieb von Brenner und Gebläse kann ein beträchtlicher Schallpegel entstehen, der vom Bedienpersonal als unangenehm empfunden wird und unter Umständen sogar zu einer Beeinträchtigung der Konzentration am Arbeitsplatz führt. Bekanntermaßen erzeugen auch Fluidströme in Rohrleitungen zuweilen beträchtliche Geräusche, so dass die gesamte durch ein Gargerät im Betrieb erzeugte Schallkulisse, insbesondere wenn mehrere solcher Gargeräte nebeneinander eingesetzt werden, als störend empfunden wird.Cooking appliances used in commercial kitchens or restaurants are regularly gas-operated and often have more than one burner unit. Furthermore, such cooking appliances are usually equipped with heat exchanger tubes and at least one fan to enter the heat generated, for example in the form of water vapor, in the cooking chamber and to circulate there. Such cooking appliances are eg from the not previously published WO 2004/020907 or the German utility model DE 202 01 184 U1 known. The operation of the burner and blower can already generate a considerable noise level, which is perceived as unpleasant by the operating personnel and may even lead to an impairment of the concentration in the workplace. As is known, fluid flows in pipelines sometimes also generate considerable noise, so that the entire soundscape generated by a cooking appliance in operation, especially when several such cooking appliances are used side by side, is perceived as disturbing.

Das Problem der unerwünschten Schallerzeugung durch unsachgemäße Fluidführung ist vor allem aus der Kraftfahrzeugtechnik bekannt. Dort wird beispielsweise versucht, über besondere Vorkehrungen die von einem Kühler zu einem Luftfilter anzusaugende Umgebungsluft in der Weise zu kanalysieren bzw. zu führen, dass ein reduzierter Schallpegel resultiert. Zu diesem Zweck werden entweder Resonatoren oder so genannte Bypassschläuche installiert, wodurch bestimmte Frequenzen herausgefiltert werden können. Resonatoren wie auch Bypassschläuche nehmen jedoch nicht wenig Platz in Anspruch und erfordern einen erheblichen Materialaufwand. Eine Übertragung dieser Technologien auf Brenner für Gargeräte kommt bereits aufgrund der regelmäßig sehr klein dimensionierten Installationsräume dieser Gargeräte nicht in Betracht. Weiterhin ist bekannt, zur wirksamen Schallreduzierung von Luftschläuchen poröse Materialien, z.B. Rohrstutzen aus gesintertem Aluminiumpulver, wie in der JP 600 50 265 A beschrieben, zu verwenden. Hiermit gehen jedoch hohe Materialkosten einher. Die Verwendung verschalter Innenwände aus einem schallabsorbierenden Material, wie in der EP 0 837 238 A2 vorgeschlagen, erhöht ebenfalls die Kosten und würde das ohnehin eingeschränkte verfügbare Volumen eines Installationsraumes eines Garraumes nochmals beschränken. Die GB 2 364 352 A versucht, eine geräuschgeminderte Fluidführung dadurch zu erreichen, dass gerade, steife Elemente mit Perforationsöffnungen, die zwischen flexiblen, in der Art eines Wellenrohrabschnitts ausgebildeten Elementen angebracht werden. Allerdings sind die Perforationsöffnungen in die geraden Elemente in exakter Abstimmung mit der Geometrie der flexiblen Wellenrohrabschnitte anzubringen. Gemäß der DE 101 44 972 C1 wird ein schallgedämpfter Luftschlauch, wie er in einem Kraftfahrzeug zwischen einem Kühler und dem Luftfilter vorliegt, dadurch erhalten, dass zwischen zwei Baugliedern aus akustisch im wesentlichen dichtem Material mindestens eine Öffnung zur Schalldämpfung vorliegt, die im Bereich der Impedanzänderung zwischen zwei benachbarten Baugliedern angeordnet ist. Ein derartiger Luftschlauch ist gemäß der DE 101 44 972 C1 kostengünstig herzustellen und verfügt gleichwohl über schallreduzierende Eigenschaften. Gemäß der DE 101 44 972 C1 sind demgemäß Öffnungen in der Wandung eines Luftschlauchs an den Stellen vorzusehen, an denen der Kühleranschlussstutzen in einen Faltbalg und dieser Faltbalg wiederum in einen Luftfilteranschlussstutzen übergeht. Dieser Lösungsansatz ist ausschließlich auf die Schallreduzierung von Kühlerschläuchen in Kraftfahrzeugen zugeschnitten, weshalb der DE 101 44 972 C1 auch keine darüber hinausgehenden Hinweise auf anderweitige Einsatzmöglichkeiten zu entnehmen sind.The problem of unwanted sound generation due to improper fluid management is known especially from automotive engineering. There is an attempt, for example, to analyze the special conditions to be sucked by a radiator to an air filter ambient air in such a way or to lead that a reduced sound level results. For this purpose, either resonators or so-called bypass tubes are installed, whereby certain frequencies can be filtered out. However, resonators as well as bypass hoses take up little space and require a considerable amount of material. A transfer of these technologies to burners for cooking appliances is already due to the regularly very small-sized installation spaces of these cooking appliances out of the question. Furthermore, it is known for effective noise reduction of air hoses porous materials, eg pipe sockets made of sintered aluminum powder, as in JP 600 50 265 A described to use. However, this involves high material costs. The use of interlocked interior walls of a sound absorbing material, as in the EP 0 837 238 A2 proposed, also increases the cost and would limit the already limited available volume of an installation space of a cooking space again. The GB 2 364 352 A Attempts to achieve a noise-reduced fluid guide in that straight, rigid elements with perforations, which are mounted between flexible, formed in the manner of a wave pipe section elements. However, the perforation openings in the straight elements are to be mounted in exact agreement with the geometry of the flexible shaft tube sections. According to the DE 101 44 972 C1 is a soundproofed air hose, such as is present in a motor vehicle between a radiator and the air filter, obtained by having between two members of acoustically substantially dense material at least one opening for sound attenuation, which is arranged in the region of the impedance change between two adjacent members. Such an air hose is according to the DE 101 44 972 C1 cost-effective and yet has sound-reducing properties. According to the DE 101 44 972 C1 Accordingly, openings are provided in the wall of an air hose at the points at which the radiator connection piece goes into a bellows and this bellows in turn into an air filter connection piece. This approach is tailored exclusively to the sound reduction of radiator hoses in motor vehicles, which is why the DE 101 44 972 C1 no further information on other possible uses can be found.

Ein gattungsgemäßes Gargerät mit einem schallgedämpften Brennersystem ist insbesondere aus der GB 2 266 137 A bekannt. Bei diesem bekannten schallgedämpften Brennersystem kommt eine Flammenkontrolleinrichtung zum Einsatz, die unter anderem eine Geräuschsreduktionseinrichtung in Form von Löchern im Bereich des Brennerkörpers umfaßt. Diese Geräuschsreduktionseinrichtung ist also ausschließlich für die Modulation der Flammengeräusche zuständig und geht mit dem Nachteil einher, dass Verbrennungsgase und/oder unverbrauchte Verbrennungsluft in das Innere eines Gargerätes, insbesondere den Garraum, eintreten kann bzw. können, was wiederum zu unerwünschten Garergebnissen führen kann.A generic cooking appliance with a sound-damped burner system is in particular from the GB 2 266 137 A known. In this known sound-damped burner system, a flame control device is used which, inter alia, comprises a noise reduction device in the form of holes in the region of the burner body. This noise reduction device is thus responsible exclusively for the modulation of the flame noise and is associated with the disadvantage that combustion gases and / or unconsumed combustion air in the interior of a cooking appliance, in particular the cooking chamber, can occur, which in turn can lead to undesirable Garergebnissen.

Es wäre daher wünschenswert, Gargeräte zugänglich zu machen, die auf konstruktiv einfache Weise in hohem Maße schallgedämpft sind, ohne einen negativen Einfluß auf einen Garprozeß zu haben. Der vorliegenden Erfindung lag daher die Aufgabe zugrunde, das gattungsgemäße Gargerät derart weiterzuentwickeln, daß die Nachteile des Stands der Technik überwunden werden. Insbesondere sollen ohne die räumlichen Gegebenheiten herkömmlicher Installationsräume von Gargeräten verändern, insbesondere vergrößern, zu müssen, auf konstruktiv einfache Weise auch im Volllastbetrieb des Gargeräts nur geringe oder keine Betriebsgeräusche nach außen dringen.It would therefore be desirable to make cooking appliances accessible, which are soundproofed in a structurally simple manner to a high degree, without having a negative effect on a cooking process. The present invention therefore an object of the invention, the generic cooking appliance further develop such that the disadvantages of the prior art are overcome. In particular, should change without the spatial conditions of conventional installation spaces of cooking appliances, in particular enlarge, have to penetrate in a structurally simple manner even in full load operation of the cooking appliance little or no operating noise to the outside.

Ein gattungsgemäßes Gargerät löst diese Aufgabe erfindunsgemäße durch die Merkmale des Kennzeichens von Anspruch 1. Bevorzugte erfindungsgemäße Gargeräte sind in den Ansprüchen 2 bis 9 beschrieben.A generic cooking appliance solves this task erfindunsgemäße by the features of the characterizing part of claim 1. Preferred cooking appliances according to the invention are described in claims 2 to 9.

Der vorliegenden Erfindung lag die überraschende Erkenntnis zugrunde, dass sich bereits durch Anbringung von Perforationsöffnungen in stromaufwärts von einem Brenner gelegenen Versorgungsleitungen der Geräuschpegel beim Betrieb von Gargeräten erheblich reduzieren lässt. Insbesondere können hierbei Geräusche beim Anfahren eines Brenners erheblich unterdrückt werden. Auf diese Weise wird ein wesentlich angenehmeres und insbesondere sicheres Arbeiten in z.B. Großküchen möglich. Von Vorteil ist weiterhin, dass auch herkömmliche Gargeräte mit einem schallgedämpften Brennersystemen ausgestattet bzw. nachgerüstet werden können, wodurch das Ausmaß an Neuinvestitionen gering gehalten werden kann.The present invention was based on the surprising finding that the noise level in the operation of cooking devices can be considerably reduced even by the provision of perforation openings in supply lines located upstream of a burner. In particular, this noise can be significantly suppressed when starting a burner. In this way, a much more pleasant and in particular safe working in e.g. Commercial kitchens possible. Another advantage is that even conventional cooking appliances can be equipped or retrofitted with a sound-damped burner systems, whereby the extent of new investments can be kept low.

Besonders bevorzugt sind benachbarte Perforationsöffnungen quer zur Strömungsrichtung, beispielsweise der Verbrennungsluft, in der Versorgungsleitung angebracht, d.h. das Fluid bzw. eine Fluidfront erreicht beide oder sämtliche Perforationsöffnungen im wesentlichen zum gleichen Zeitpunkt. Bei Beachtung der beanspruchten Vorgaben hinsichtlich Größe und Anbringung von benachbarten Perforationsöffnungen gelingt es besonders effektiv, die Betriebsgeräusche der erfindungsgemäßen Gargeräte zu reduzieren. Es wird vermutet, dass sich mit den gefundenen Maßnahmen eine asymmetrische Strömung erzielen lässt, wodurch die Ausbreitung einer stehenden Welle verhindert wird.Particularly preferably, adjacent perforation openings are arranged transversely to the flow direction, for example the combustion air, in the supply line, ie the fluid or a fluid front reaches both or all perforation openings substantially at the same point in time. By observing the claimed specifications with regard to size and attachment of adjacent perforation openings, it is possible to reduce the operating noise of the cooking appliances according to the invention in a particularly effective manner. It is believed that the measures found can achieve asymmetric flow, preventing the propagation of a standing wave.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachstehenden Beschreibung, in der ein Ausführungsbeispiel der Erfindung anhand einer aus einer einzigen Figur bestehenden Zeichnung im Einzelnen erläutert werden. Dabei zeigt die

Figur
eine schematische Draufsicht auf einen Luftansaugstutzen als Teil des Brennersystems in einem erfindungsgemäßen Gargerät.
Further features and advantages of the invention will become apparent from the following description in which an embodiment of the invention with reference to a single figure of a drawing are explained in detail. It shows the
figure
a schematic plan view of an air intake as part of the burner system in a cooking appliance according to the invention.

Erfindungsgemäß kann, wie in der Figur abgebildet, vorgesehen sein, Perforationsöffnungen 54', 56' in einem Stutzen 62', der als Winkelstutzen ausgebildet ist und einen Teil einer zweiten Versorgungsleitung 58' zum Zuführen von Verbrennungsluft zu einem nicht gezeigten Brenner eines Gargeräts darstellt, bereitzustellen. Dieser Stutzen lässt sich dann ohne weiteres beispielsweise an einen nicht gezeigten Luftsammler anschließen.According to the invention, as shown in the figure, perforation openings 54 ', 56' in a nozzle 62 ', which is formed as an elbow and part of a second supply line 58' for supplying combustion air to a burner, not shown, a cooking appliance, provide. This nozzle can then easily connect, for example, to an air collector, not shown.

Der erfindungsgemäße Erfolg stellt sich mit der in der Figur gezeigten Ausführungsform insbesondere dann ein, wenn die Perforationsöffnungen 54', 56' über einen Durchmesser von etwa 6 mm verfügen und deren Mittelpunkte voneinander einen Abstand von etwa 15 mm aufweisen.The inventive success arises with the embodiment shown in the figure, in particular when the perforation openings 54 ', 56' have a diameter of about 6 mm and whose centers have a distance of about 15 mm from each other.

Die in der vorstehenden Beschreibung, in den Ansprüchen sowie in den Zeichnungen offenbarten Merkmale können sowohl einzeln, als auch in jeder beliebigen Kombination, für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein.The features disclosed in the foregoing description, in the claims and in the drawings may, both individually and in any combination, be essential for the realization of the invention in its various embodiments.

Claims (9)

  1. Cooking appliance having at least one heat generator for generating hot air and/or steam for carrying out a cooking process, it being the case that the heat generator comprises at least one burner which is operated by a combustible fluid, in particular a combustible gas/air mixture, from either at least one first supply device for feeding the combustible fluid or the fluids and at least one second supply device (58') for feeding combustion air or at least one third supply device for feeding the combustible fluid or the fluids and combustion air, and from which combustible gases and/or unused combustion air are/is channelled away via at least one disposal device, and having at least one sound-damped burner system, characterized in that the second or third supply device (58') comprises a respective elbow socket (62'), and the elbow socket (62'), upstream of a fan and/or air collector, has at least one perforation opening (54' 56') for reducing the noise level during operation of the cooking appliance.
  2. Cooking appliance according to Claim 1,
    characterized in that at least one perforation opening is provided over its entire surface area, or over part of its surface area, with at least one open-pored or porous protective fabric.
  3. Cooking appliance according to Claim 2, characterized in that the protective fabric consists essentially of metal and/or polymer nonwoven, in particular comprising polypropylene.
  4. Cooking appliance according to one of the preceding claims, characterized in that at least two perforation openings (54', 56') are arranged along the circumference of the second or third supply devices (58').
  5. Cooking appliance according to one of the preceding claims, characterized in that the entire surface area of the perforation opening or openings corresponds essentially to the cross-sectional surface area of the second or third supply device, in particular in the region of an air-intake end or of an air-outlet end of the second supply device.
  6. Cooking appliance according to one of the preceding claims, characterized in that at least the second supply device (58') has at least two spaced-apart, adjacent perforation openings (54', 56') directed transversely to the flow direction of the combustion air.
  7. Cooking appliance according to Claim 6,
    characterized in that the spaced-apart, adjacent perforation openings have a diameter or a width in the range of 2 to 18 mm, preferably in the range of 3 to 12 mm and particularly preferably in the range of 4 to 9 mm.
  8. Cooking appliance according to Claim 6 or 7, characterized in that the spacing between spaced-apart, adjacent perforation openings is in the range of 3 to 30 mm, preferably in the range of 5 to 25 mm and particularly preferably in the range of 10 to 20 mm.
  9. Cooking appliance according to one of Claims 6 to 8, characterized in that the diameter or the width of spaced-apart, adjacent perforation openings is in the range of 5 to 7 mm, and in that the spacing between spaced-apart adjacent perforation openings is in the range of 14 to 16 mm.
EP20050004385 2004-03-01 2005-02-28 Cooking appliance with sound insulated burner system Active EP1571398B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200420003141 DE202004003141U1 (en) 2004-03-01 2004-03-01 Soundproofed burner system for a cooking device and cooking device with such a burner system
DE202004003141U 2004-03-01

Publications (3)

Publication Number Publication Date
EP1571398A2 EP1571398A2 (en) 2005-09-07
EP1571398A3 EP1571398A3 (en) 2006-04-05
EP1571398B1 true EP1571398B1 (en) 2008-01-09

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Application Number Title Priority Date Filing Date
EP20050004385 Active EP1571398B1 (en) 2004-03-01 2005-02-28 Cooking appliance with sound insulated burner system

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EP (1) EP1571398B1 (en)
DE (2) DE202004003141U1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1393460B1 (en) * 2009-03-23 2012-04-20 Lainox Ali Spa PRESSURE COMPENSATOR DEVICE FOR FITTING THE AIR SUCTION TUBE TO THE SLEEVE OF AN INTAKE MANIFOLD FOR BURNER, AND OVEN OF THE GAS TYPE TO CONVECTION OR MIXED FOR THE COOKING OF FOODS PROVIDED WITH THIS DEVICE
DE202010005261U1 (en) 2010-04-20 2010-07-01 Lainox Ali S.P.A., Vittorio Veneto Pressure equalizer for connecting the air intake pipe with the socket of a manifold for burner, and convection or combi gas stove for cooking food, which is equipped with this device
DE202011102877U1 (en) * 2011-07-05 2012-10-10 Rational Aktiengesellschaft Cooking appliance
DE102012019760A1 (en) 2012-10-09 2014-04-24 Labetherm Ltd. Method for operating gas-air premixing burner, involves controlling ignition process upstream end, after flushing of heat exchanger with fresh air is reduced, so that firing process does not start at maximum flow-optimized speed
US10711997B2 (en) 2017-10-03 2020-07-14 Lennox Industries Inc. Burner box liner for low NOx emission furnace
US11187433B2 (en) 2017-10-03 2021-11-30 Lennox Industries Inc. Pre-mix burner assembly for low NOx emission furnace
US10711998B2 (en) 2017-10-03 2020-07-14 Lennox Industries Inc. Fresh air intake for low NOx emission furnace
US11162677B2 (en) * 2019-01-18 2021-11-02 Lennox Industries Inc. Air intake coupling with noise suppression for low NOx emission furnace
IT202100002357A1 (en) 2021-02-03 2022-08-03 Ali Group S R L "ANTI-RESONANCE DEVICE IN A GAS OVEN OF THE TYPE FOR COOKING FOOD IN COLLECTIVE RESTAURANTS"

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5471972A (en) * 1993-11-10 1995-12-05 Gas Research Institute Self-cleaning gas-fueled oven for cooking
DE10144972C1 (en) * 2001-09-12 2003-05-15 Woco Franz Josef Wolf & Co Gmbh Fluid guidance, in particular in the form of a raw air hose for sucking raw air into an air filter of a motor vehicle
US7017571B2 (en) * 2003-06-18 2006-03-28 Convotherm Elektrogeräte GmbH Heat exchanger device

Also Published As

Publication number Publication date
DE202004003141U1 (en) 2004-06-17
EP1571398A3 (en) 2006-04-05
EP1571398A2 (en) 2005-09-07
DE502005002457D1 (en) 2008-02-21

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