EP0609157B1 - Direkt gasbeheizter Dampfofen - Google Patents

Direkt gasbeheizter Dampfofen Download PDF

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Publication number
EP0609157B1
EP0609157B1 EP94420011A EP94420011A EP0609157B1 EP 0609157 B1 EP0609157 B1 EP 0609157B1 EP 94420011 A EP94420011 A EP 94420011A EP 94420011 A EP94420011 A EP 94420011A EP 0609157 B1 EP0609157 B1 EP 0609157B1
Authority
EP
European Patent Office
Prior art keywords
burner
gas
oven
enclosure
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.)
Expired - Lifetime
Application number
EP94420011A
Other languages
English (en)
French (fr)
Other versions
EP0609157A1 (de
Inventor
André Rigaud
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.)
Societe Cooperative de Production Bourgeois SCOP
Original Assignee
Societe Cooperative de Production Bourgeois SCOP
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 Societe Cooperative de Production Bourgeois SCOP filed Critical Societe Cooperative de Production Bourgeois SCOP
Publication of EP0609157A1 publication Critical patent/EP0609157A1/de
Application granted granted Critical
Publication of EP0609157B1 publication Critical patent/EP0609157B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • the present invention relates to direct gas heating steam ovens, in particular for cooking food products.
  • Such a known convection and direct gas heating oven essentially comprises an enclosure closed by a peripheral wall and a door, the interior space of the enclosure comprising a first part for receiving the food products to be cooked and a second part containing a at least one gas burner connected to a system for supplying a mixture of gas and combustion air under pressure and on the other hand at least one turbine for circulating heated air in the two parts of the enclosure.
  • the gas burner is placed upstream of the turbine in the air circulation current caused by the turbine, in an intermediate enclosure part situated between a first partition wall the separating it from the part containing the food to be cooked, and a second partition wall separating it from the part occupied by the turbine.
  • the burner is then placed in the upper position of the enclosure, and oriented to direct the flame downward, favoring the flow of water possibly formed by condensation in the burner.
  • This solution leads to a significant increase in the size of the functional organs of the oven, thereby reducing the volume of the useful part intended to receive the food to be cooked.
  • the cleaning of the various functional organs requires the disassembly of two successive walls, and this disassembly is particularly delicate owing to the presence of various detection probes associated with the burner to control or command the gas flame.
  • the problem proposed by the present invention is to design a new structure of a steam oven with direct gas heating, in which all the functional members such as the turbine and the burner are included in a single enclosure part, to occupy a volume reduced, a single wall that can separate this enclosure part with the useful part intended to receive the food to be cooked, and in which means are provided to prevent the accumulation of condensation water in the burner and to promote stabilization and maintaining the gas flame.
  • Another object of the invention is to considerably facilitate the cleaning of the functional elements of the oven, and to reduce the risks of degradation of these functional elements during cleaning.
  • the invention also makes it possible to better distribute the flame in the burners, improving combustion and the distribution of heat.
  • the convection oven and direct gas heating comprises an enclosure surrounded by a peripheral wall provided with a door, the enclosure being divided into two parts by an intermediate wall. single with air inlet and air outlet orifices, the first enclosure part being intended to receive the food products to be cooked, the second enclosure part containing on the one hand at least one connected gas burner a gas and combustion air supply system under pressure and on the other hand at least one turbine for circulating heated air in the two parts of the enclosure.
  • the gas burner is placed downstream of the turbine in the air circulation current caused by the turbine.
  • a steam generator is associated to introduce steam into the enclosure.
  • the outlet openings of the gas burner are oriented in such a way that any water condensates formed in the burner can flow by gravity out of the burner through said outlet openings, and in such a way that the flow of burning gas forming the flame flows in a direction forming with the direction of the flow of air flow from the turbine near the burner an angle of orientation less than a limit value maximum causing the drop of the flame.
  • This orientation angle is advantageously less than approximately 90 °.
  • the oven comprises a single turbine in a substantially central position near the rear wall of the oven, and a gas burner in the form of a ramp placed above the turbine in substantially horizontal orientation, the outlet orifices of the burner being oriented forward towards the intermediate wall.
  • the furnace comprises two turbines arranged one above the other near the rear wall of the furnace, and two ramp-shaped gas burners placed respectively above one and on the other, the turbines in substantially horizontal orientation, the burner outlet orifices being oriented towards the front in the direction of the intermediate wall.
  • the oven according to the invention comprises an enclosure 1 closed by a peripheral wall 2 and a front door 3.
  • the interior space of the enclosure 1 is divided, by an intermediate wall 4 with inlet openings air 5 and air outlet ports 6, in a first part 7 receiving the food products to be cooked and in a second part 8 containing the functional elements of the oven.
  • the second part 8 contains on the one hand a gas burner 9 connected to a system 10 for supplying a mixture of gas and combustion air under pressure, and on the other hand a turbine 11 for circulating heated air in the two parts of the enclosure.
  • the turbine 11 is driven in rotation by an electric motor 12.
  • a steam generator 13 is associated to introduce steam into the enclosure 1, as shown diagrammatically in the figures.
  • the turbine 11 is rotatable along an anteroposterior axis 14 perpendicular to the posterior wall 15 of the furnace.
  • the turbine 11 is of the type aspirating the air axially, as shown by the arrows 16, and ejecting the air radially as shown by the arrows 17.
  • the burner 9 is, in the embodiment shown, placed in the upper part of the second enclosure part 8, above the turbine 11. It is thus located downstream of the turbine 11 in the circulation current of air caused by the turbine.
  • the burner 9 is in the general shape of a tube with a substantially horizontal axis and parallel to the rear wall 15 of the furnace. It comprises gas outlet orifices oriented in such a way that the flow of burning gas forming the flame 18 flows forward towards the intermediate wall 4, that is to say perpendicular to the direction of flow of air blown by the turbine 11 in the second enclosure part 8.
  • the orientation of the burner 9 can be different, and can be chosen within a variation range such that the direction I of the gas flow forming the flame 18 forms with the direction II of air flow in the vicinity of the burner 9 an angle orientation less than a maximum limit value causing the flame 18 to drop off under the action of the air flow.
  • This orientation angle is advantageously less than approximately 90 °.
  • the burner 9 is oriented in such a way that any water condensates formed in the burner can flow by gravity out of the burner through its outlet orifices.
  • the flame 18 is directed towards the front, against the intermediate wall 4, which can then advantageously be covered with a thermal protection plate 19.
  • the flame 18 can be directed rearward towards the rear wall 15. It is necessary to avoid directing the flame 18 upward, because the burner outlet orifices then no longer allow the flow of water. by gravity out of the burner.
  • the burner can also be placed in the lower part of the second enclosure part 8, below the turbine 11.
  • the flame can then be directed either towards the front against the intermediate wall 4, or towards the rear against the rear wall 15, either even against the bottom 20 of the enclosure, or in any intermediate orientation downward between the forward orientation and the rearward orientation.
  • the structure itself of the burner 9 is advantageously tubular, and can be similar to that described in document EP-A-0 409 685, with a series of slots distributed over the length of the tube, substantially perpendicular to the axis of the tube. , and open on a little less than the half-circumference of the tube.
  • Such a tube is advantageously associated with deflector plates parallel to the axis of the tube and bordering the ends of the outlet slots.
  • Such a tube is connected to an inlet pipe for a mixture of gas and air.
  • the pipe inlet orifice is advantageously located in the central position of the burner, equidistant from the two ends. This improves the distribution of the gas, and a more regular flame is produced along the burner.
  • a discharge outlet 21 for the burnt gases is provided in the upper position of the second enclosure part 8.
  • the intermediate wall 4 comprises air inlet openings 5 arranged facing the turbine 11, to allow filtering and axial introduction of air into the turbine as shown by the arrows 16
  • the intermediate wall 4 also comprises air outlet openings 6 formed in the vicinity of its connection to the peripheral enclosure wall, preferably in the vicinity of the intermediate wall connection 4 with the side walls of the furnace.
  • the intermediate wall 4 is advantageously removable, its exit from the enclosure 1 being effected by the door 3. Its removal allows the cleaning of the functional elements contained in the second enclosure part 8. All the functional elements of the oven are contained in the same enclosure part 8. Their cleaning only requires the removal of the intermediate wall 4. This considerably facilitates the cleaning operations. In particular, the removal of the intermediate wall 4, which is located entirely at the front of all the functional organs, does not risk damaging the functional organs and in particular the detection probes which are associated with the burner 9 so known, for detecting and controlling the flame 18.
  • the oven comprises a single turbine 11 in a substantially central position near the rear wall 15 of the oven, and a gas burner 9 in the form of a tube placed above the turbine 11 in substantially horizontal orientation, the flame being oriented towards the front towards the intermediate wall 4.
  • the oven comprises two turbines 111 and 211, arranged one above the other along the rear wall of the oven, and two gas burners 109 and 209 in the form of a tube placed respectively above one and the other of the turbines in substantially horizontal orientation, the outlet orifices of the burners being oriented forward towards the intermediate wall.

Claims (8)

  1. Konvektions- und Heizungsofen direkt mit Gas, insbesondere für die Küche von Nahrungsmitteln, bestehend aus einer Einfassung (1), die durch eine Umfangswand (2) und eine Tür (3) geschlossen ist, wobei der Innenraum der Einfassung (1) durch eine Zwischenwand (4) mit Lufteintritts- und Austrittsöffnungen (5, 6) in einen ersten Bereich (7) zur Aufnahme von zu kochenden Nahrungsmitteln und in einen zweiten Bereich (8) unterteilt ist, der einerseits wenigstens einen Gasbrenner (9) enthält, der mit einem Versorgungssystem (10) für ein Verbrennungsgemisch aus Gas und Luft unter Druck verbunden ist, und andererseits wenigstens eine Turbine (11) für eine Zirkulationsbewegung der erhitzten Luft in den beiden Bereichen (7, 8) der Einfassung, wobei der Gasbrenner (9) in der durch die Turbine verursachten Zirkulationsströmung der Luft stromaufwärts von der Turbine (11) angeordnet ist, wobei ein Wasserdampferzeuger (13) für die Einleitung des Wasserdampfes in die Einfassung (1) assoziert ist, dadurch gekennzeichnet, daß die Austrittsöffnungen des Gasbrenners (9) in solcher Art und Weise orientiert sind, daß die evtl. Wasserkondensate, die in dem Brenner (9) gebildet sind, durch Schwerkraft nach außerhalb des Brenners über die besagten Austrittsöffnungen ablaufen können, und von solcher Art und Weise, daß der die Flamme (18) bildende Verbrennungsgasstrom in einer Richtung (I) strömt, die mit der Richtung (II) der von der Turbine (11) abgegebenen ausströmenden Luftströmung in der Nähe des Brenners (9) einen Orientierungswinkel kleiner als ein maximaler Grenzwert bildet, welcher den Abriß der Flamme (18) verursacht.
  2. Ofen nach Anspruch 1, dadurch gekennzeichnet, daß der Orientierungswinkel kleiner als 90° ist.
  3. Ofen nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß:
    - die Turbine (11) um eine von vorne nach hinten verlaufende Achse (14) drehbar ist,
    - die Zwischenwand (4) Lufteintrittsöffnungen (5) in Bezug auf die Turbine für einen axialen Lufteintritt aufweist und Luftaustrittsöffnungen ( 6) in der Nähe ihrer Verbindung mit der Umfangswand (2) der Einfassung (1).
  4. Ofen nach Anspruch 3, dadurch gekennzeichnet, daß er eine einzige Turbine (11) in einer im wesentlichen zentralen Position nahe der hinteren Wand (15) des Ofens aufweist und einen Gasbrenner (9) mit der Ausbildung eines Rohres, das oberhalb der Turbine (11) mit einer im wesentlichen horizontalen Orientierung angeordnet ist, wobei die Austrittsöffnungen des Brenners (9) nach vorne in Richtung der Zwischenwand (4) orientiert sind.
  5. Ofen nach Anspruch 3, dadurch gekennzeichnet, daß er zwei Turbinen (111, 211) aufweist, die übereinander nahe der hinteren Ofenwand (15) angeordnet sind, und zwei Gasbrenner (109, 209) mit der Ausbildung eines Rohres, das jeweils oberhalb der einen und der anderen der Turbinen mit einer im wesentlichen horizontalen Orientierung angeordnet ist, wobei die Austrittsöffnungen der Brenner nach vorne in Richtung der Zwischenwand (4) orientiert sind.
  6. Ofen nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß die Luftaustrittsöffnungen (6) in der Nähe der Verbindung der Zwischenwand (4) mit den Seitenwänden des Ofens vorgesehen sind.
  7. Ofen nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Zwischenwand (4) ablösbar ist, um die Reinigung der funktionellen Elemente zu erlauben, die in dem zweiten Bereich (8) der Einfassung enthalten sind.
  8. Ofen nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß in gerader Linie zu dem oder den Brennern (9) die Zwischenwand (4) mit thermischen Schutzplatten (19) bedeckt ist.
EP94420011A 1993-01-29 1994-01-12 Direkt gasbeheizter Dampfofen Expired - Lifetime EP0609157B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9301123 1993-01-29
FR9301123A FR2701090B1 (fr) 1993-01-29 1993-01-29 Four à vapeur à chauffage direct au gaz.

Publications (2)

Publication Number Publication Date
EP0609157A1 EP0609157A1 (de) 1994-08-03
EP0609157B1 true EP0609157B1 (de) 1997-10-22

Family

ID=9443645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94420011A Expired - Lifetime EP0609157B1 (de) 1993-01-29 1994-01-12 Direkt gasbeheizter Dampfofen

Country Status (6)

Country Link
US (1) US5460158A (de)
EP (1) EP0609157B1 (de)
CA (1) CA2114196C (de)
DE (1) DE69406317T2 (de)
ES (1) ES2109641T3 (de)
FR (1) FR2701090B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2286455B (en) * 1994-02-10 1998-01-14 Stoves Plc Improvements in and relating to gaseous fuel burner assemblies and to appliances incorporating such burner assemblies
ES2117497B1 (es) * 1994-05-19 1999-02-16 Salva Ind Mejoras introducidas en hornos de panaderia y pasteleria ciclotermicos.
US5515773A (en) * 1995-02-16 1996-05-14 The Rival Company Steam oven
KR100402585B1 (ko) * 2000-12-30 2003-10-22 주식회사 엘지이아이 전자레인지의 내부공기순환구조
CN2669018Y (zh) * 2003-09-30 2005-01-05 梁锡球 一种适用于燃气具或燃气动力机的水助燃节能装置
US8138452B2 (en) * 2008-07-14 2012-03-20 Whirlpool Corporation Convection oven
US8258435B2 (en) * 2008-12-16 2012-09-04 Whirlpool Corporation Dual fan convection oven
US9683747B2 (en) * 2011-12-16 2017-06-20 Alto-Shaam, Inc. Combination oven with catalytic converter
KR101564504B1 (ko) * 2014-04-03 2015-10-29 엘지전자 주식회사 조리기기, 버너 및 버너 어셈블리
US10907836B2 (en) * 2015-11-11 2021-02-02 Laxminarasimhan Vasan Convection based cooking apparatus with adjustable inlet shutter
DE102016215650A1 (de) * 2016-08-19 2018-02-22 BSH Hausgeräte GmbH Haushaltsgargerät

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5685641A (en) * 1979-12-14 1981-07-11 Matsushita Electric Ind Co Ltd Forced heat circulation-type gas oven
JPS5851168B2 (ja) * 1979-12-18 1983-11-15 株式会社東芝 高周波加熱装置
FR2609532B1 (fr) * 1987-01-08 1990-12-14 Bourgeois Sc Four a vapeur au gaz
US4813398A (en) * 1988-05-09 1989-03-21 Hobart Corporation Convection oven
GB8815381D0 (en) * 1988-06-28 1988-08-03 New World Domestic Appliances Cooking ovens
FR2650061B1 (fr) * 1989-07-19 1991-11-15 Gaz De France Four perfectionne fonctionnant a la vapeur et/ou au gaz
DE4116500A1 (de) * 1991-05-21 1992-11-26 Binder Wtb Labortech Gmbh Labor-waermeschrank

Also Published As

Publication number Publication date
DE69406317D1 (de) 1997-11-27
FR2701090B1 (fr) 1995-04-07
DE69406317T2 (de) 1998-04-30
EP0609157A1 (de) 1994-08-03
FR2701090A1 (fr) 1994-08-05
CA2114196C (fr) 1996-11-12
CA2114196A1 (fr) 1994-07-30
US5460158A (en) 1995-10-24
ES2109641T3 (es) 1998-01-16

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