EP0115838B1 - Four à plusieurs fonctions opérant au gaz - Google Patents

Four à plusieurs fonctions opérant au gaz Download PDF

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Publication number
EP0115838B1
EP0115838B1 EP84100921A EP84100921A EP0115838B1 EP 0115838 B1 EP0115838 B1 EP 0115838B1 EP 84100921 A EP84100921 A EP 84100921A EP 84100921 A EP84100921 A EP 84100921A EP 0115838 B1 EP0115838 B1 EP 0115838B1
Authority
EP
European Patent Office
Prior art keywords
cooking space
gas
disposed
oven
wall
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
EP84100921A
Other languages
German (de)
English (en)
Other versions
EP0115838A3 (en
EP0115838A2 (fr
Inventor
Karl-Heinz Ing.Grad. Frese
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.)
FRANK AKTIENGESELLSCHAFT
Original Assignee
FRANK 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
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Application filed by FRANK AG filed Critical FRANK AG
Priority to AT84100921T priority Critical patent/ATE80213T1/de
Publication of EP0115838A2 publication Critical patent/EP0115838A2/fr
Publication of EP0115838A3 publication Critical patent/EP0115838A3/de
Application granted granted Critical
Publication of EP0115838B1 publication Critical patent/EP0115838B1/fr
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

Definitions

  • the invention relates to a gas-operated baking and roasting oven according to the preamble of claim 1.
  • a furnace of this type is known from DE-B-23 07 914.
  • this oven is designed as a pure convection oven. This results from the double-walled design of the floor of the useful space and the outlet openings for the positively guided heating gases which are arranged at a distance from the rear useful space wall. Furthermore, the gas outlet is arranged in the rear area of the usable space in the vicinity of the fan.
  • a disadvantage of this furnace in recirculation mode is the intersecting gas flows in the outlet area of the exhaust gas duct, which have an unfavorable effect on the flame stability of the flames in the combustion chamber.
  • the invention is therefore based on the object of providing a gas-operated baking and roasting oven which is equally suitable for convection operation and recirculation mode and is optionally switchable, is of simple construction and requires little energy in the grill, cooking or operation with automatic roasting.
  • the oven should respond to the new operating state immediately when switching over, ie allow the temperature to be quickly increased or decreased for frying or cooking in an energy-saving manner.
  • the invention is based on the finding that when a fan is used in a conventional gas oven, turbulence is generated in the baking chamber, which is necessary and desirable for baking and roasting, but also continues down through the exhaust gas conduit into the combustion chamber and there destabilization of the flames on the burner. This causes the flames to rise and the combustion to deteriorate considerably, which leads to the formation of CO, which necessitates the installation of flame baffles on the outside of the burner at a certain distance, which are passed by combustion air entering through openings leading to the outside.
  • the flue gas duct is guided so high inside the usable space on the rear wall of the furnace according to the invention that the hot gases are conducted upwards when the fan is switched off and are sucked in directly by the fan when it is switched on.
  • the gas oven according to the invention can be changed from the circulating air mode of operation to the conventional mode of operation by simply switching the fan on or off, without the proper functioning of the burner being impaired.
  • the arrangement according to the invention creates a negative pressure in the combustion chamber, which is compensated for by the openings leading in from the outside. The air required for combustion enters through these openings, is led past the burners through the flame baffles and is then sucked in either by the duct alone or by the fan via the duct. This arrangement provides the flames with enough secondary air for post-combustion.
  • the conditions are favored by a horizontal chimney on the ceiling, through which the exhaust gases are led outside will.
  • Infrared heaters are arranged for rapid heating from above.
  • an infrared radiator is provided on the inside at the top of the baking chamber, which can be used for rapid heating.
  • a gas-powered infrared grill on the inside at the top of the baking chamber.
  • a gas burner is provided, which is separated from the baking chamber by a transparent, heat-resistant material such as, for example, a glass ceramic, as is also used for glass ceramic hot plates.
  • This provides a gas-heated multi-function oven that combines all the advantages that were previously only achievable with electric ovens and also has up to 50% less energy consumption when roasting meat, poultry, etc.
  • a usable space 10 for baking or roasting can be closed on the front with a door 12 and has a covered underside 14.
  • a burner chamber 20 there are controllably the flames 22 with which the energy can be used.
  • the heat generated is released via the underside 14 to the useful space 10, which is indicated by the small arrows 24.
  • the fresh air access is indicated by the arrows 26.
  • One for gas baking or roasting stoves with air recirculation The usual direct access of the hot exhaust gases 28 into a fan housing 40 is closed. At this point there is an oblique double wall 36 between channel 30 and housing 40.
  • the hot gases marked by arrows 28 are directed exclusively through the channel 30 provided according to the invention, and this was intentionally moved in front of the housing 40 of an accelerator 44 and pulled up on it.
  • the channel 30 extends, as can be seen in FIG. 2, across the width of the usable space 10 and consists of a wide, lower opening 32 for the access of the hot gases 28.
  • the channel 30 is led up to a suction opening covered with a sieve 38 and opens into the utility room 10 with a narrow outlet 34.
  • the height of the new channel 30 was chosen so that the hot gases are led to just below the suction opening 38.
  • the hot gases are guided upwards along the rear wall and, since no other outlet is offered, are directed forward under an upper wall 46 into the inlet 48 of an exhaust gas fireplace 50 Function of this upper deflection will be discussed in more detail below in the description of the recirculation mode. Due to the arrangement described so far, the heat generated is used in a good manner during normal operation without circulating air, which is always possible in a conventional manner, since the food to be heated in the usable space 10 is washed around by the hot gases from all sides.
  • the usual simple grill operation is also possible, for which an infrared radiator 52 is in the simplest way the upper wall 46 is arranged.
  • This can be an electrically or gas operated infrared emitter.
  • the electric radiator is less expensive to manufacture, and during its short-term operation, the energy consumption of the other cooker operation outweighs the gas connection.
  • a gas-powered infrared radiator which will be described below, the consumption energy remains the gas.
  • the transition to circulating air operation is possible at any time without mechanical change by switching on the accelerator 44 designed as a fan.
  • an axial fan 44 is shown schematically as an accelerator, in its place any other fan, such as a tangential fan or a radial fan with different drives, can be used.
  • the accelerator 44 is switched on, the operating states shown in FIGS. 3 and 4 are established. Via the suction opening 38 covered with a removable and cleanable sieve, the hot gases indicated by the arrows 28 are directed into the housing 40 and emerge accelerated, marked as arrows 54, from the upper and lateral openings from the housing 40 into the usable space 10.
  • This new arrangement creates a negative pressure in the combustion chamber during operation with circulating air, instead of an otherwise frequently occurring excess pressure, which is compensated for by the openings leading in from the outside.
  • the infrared radiator 52 can be switched on in a supportive manner for the high heating.
  • the infrared heater is attached to the oven ceiling.
  • this is attached in an advantageous embodiment of the invention outside the actual usable space 10. It draws its combustion air 64 from the outside and delivers its exhaust gases to the common exhaust duct 50 for the exhaust gases from the oven.
  • the space in which the grill 60 is located is closed off from the useful space 10 by a heat-resistant glass plate 62, preferably glass ceramic.
  • Grilling with the door 12 closed can save up to 50% energy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Tunnel Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Gas Separation By Absorption (AREA)

Claims (4)

  1. Four au gaz à cuire et à rôtir comportant
    - au moins un brûleur au gaz (16) agencé sous le côté inférieur d'une zone utile (10) dans une zone de brûleurs (20),
    - un logement (40) agencé sur une paroi latérale de la zone utile destiné à recevoir un accélérateur (44) avec une ouverture d'aspiration (38) et plusieurs ouvertures de sortie (56) en direction de la zone utile (10) pour la circulation forcée des gaz d'évacuation chauds (28) et une paroi inférieure (36) s'étendant obliquement vers la zone de brûleurs (20),
    - un conduit des gaz d'évacuation (30) raccordé à la zone de brûleurs (20) qui s'étend sur toute la largeur de la zone utile (10) et dont la sortie (34) est agencée sous l'ouverture d'aspiration (38) prévue dans la paroi du logement, et
    - une ouverture de sortie (50) agencée dans la paroi supérieure de la zone utile (10) pour la sortie des gaz d'évacuation provenant du four,
    caractérisé on ce que
    - la paroi de logement dirigée vers le zone utile (10) forme la paroi latérale de la zone utile (10) et le conduit des gaz d'évacuation (30) agencé en amont de la paroi latérale à l'intérieur de la zone utile (10) remonte jusqu'à l'ouverture d'aspiration (38),
    - les ouvertures de sortie (56) sont agencées au-dessus de la sortie (34) du conduit des gaz d'évacuation (30) et au-dessus de la zone marginale inférieure de l'ouverture d'aspiration (38),
    - au-dessous de la limite supérieure de la zone utile (10) est prévu un conduit des gaz d'évacuation (50) allongé s'étendant horizontalement et dont l'orifice d'accès (48) se situe dans la région antérieure de la zone utile (10),
    - le ou les brûleur(s) au gaz (16, 60) sont ajustables et peuvent être commutés sur deux positions avec une différence de température considérable pour passer de la fonction normale à la fonction automatique rôtissage, une partie de l'énergie thermique étant transférée aux parois de la zone utile (10) léchées par les flammes de gaz (22), et en ce que
    - l'accélérateur (44) peut être commuté sélectivement sur la convection ou sur la circulation d'air.
  2. Four selon la revendication 1, caractérisé en ce que la paroi inférieure s'étendant obliquement, du logement (40) est conçue sous forme de double paroi (36).
  3. Four selon la revendication 1, caractérisé en ce qu'au niveau de la paroi supérieure de la zone utile (10) il est prévu un radiateur aux rayons infrarouges (60) agissant dans la zone utile.
  4. Four selon la revendication 3, caractérisé en ce que le radiateur aux rayons infrarouges (60) fonctionne au gaz, son air de combustion est prélevé directement de l'environnement à l'extérieur du four (64) et ses gaz d'échappement sont amenés dans le conduit des gaz d'échappement (50).
EP84100921A 1983-02-07 1984-01-30 Four à plusieurs fonctions opérant au gaz Expired - Lifetime EP0115838B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84100921T ATE80213T1 (de) 1983-02-07 1984-01-30 Gasbetriebener mehrfunktionsbackofen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3304059 1983-02-07
DE3304059A DE3304059C2 (de) 1983-02-07 1983-02-07 Gasbetriebener Backofen

Publications (3)

Publication Number Publication Date
EP0115838A2 EP0115838A2 (fr) 1984-08-15
EP0115838A3 EP0115838A3 (en) 1986-12-30
EP0115838B1 true EP0115838B1 (fr) 1992-09-02

Family

ID=6190181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100921A Expired - Lifetime EP0115838B1 (fr) 1983-02-07 1984-01-30 Four à plusieurs fonctions opérant au gaz

Country Status (3)

Country Link
EP (1) EP0115838B1 (fr)
AT (1) ATE80213T1 (fr)
DE (1) DE3304059C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4364573A1 (fr) * 2022-11-03 2024-05-08 CLM Bakery System S.r.l. Ligne de cuisson et four pour la cuisson de produits alimentaires et procédé de fonctionnement associé

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205273A (en) * 1991-12-23 1993-04-27 Viking Range Corporation Convection-radiant heated oven
FR2687899A1 (fr) * 1992-03-02 1993-09-03 Pavailler Jacques Perfectionnement des fours de boulangerie.
IT1267036B1 (it) * 1993-01-27 1997-01-24 Fime Fab It Motor Elett Forno a gas per cucine di tipo ventilato, ad alto rendimento
IT1265578B1 (it) * 1993-11-04 1996-11-22 Zanussi Grandi Impianti Spa Forno di cottura dotato di dispositivi perfezionati di pulitura automatica
DE29511535U1 (de) * 1995-07-17 1995-11-02 Kulbach, Egon, 65549 Limburg Gas-Kombi-Umluftbackofen
GB2494866B (en) * 2011-09-19 2014-01-29 Basic Holdings Cooking appliance
DE102013107091A1 (de) * 2013-07-05 2015-01-08 Miele & Cie. Kg Gargerät und Verfahren zum Betreiben eines Gargerätes
US10051995B2 (en) 2015-09-18 2018-08-21 7794754 Canada Inc. Atmospheric rotisserie burner with convection heating
US12031727B2 (en) 2021-03-05 2024-07-09 Electrolux Home Products, Inc. Oven bake heating channel exchange system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2452100C3 (de) * 1974-11-02 1980-03-27 Neff - Werke, Carl Neff Gmbh, 7518 Bretten Heißluftbackofen für Gasbeheizung
GB2062847B (en) * 1979-08-11 1983-02-16 Carron Co Cooking oven
DE2950946C2 (de) * 1979-12-18 1984-08-09 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Backofen mit Umluftgebläse und Grillheizkörper
US4395233A (en) * 1981-06-22 1983-07-26 G. S. Blodgett Co., Inc. Dual flow heating apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4364573A1 (fr) * 2022-11-03 2024-05-08 CLM Bakery System S.r.l. Ligne de cuisson et four pour la cuisson de produits alimentaires et procédé de fonctionnement associé

Also Published As

Publication number Publication date
EP0115838A3 (en) 1986-12-30
DE3304059A1 (de) 1984-08-09
ATE80213T1 (de) 1992-09-15
EP0115838A2 (fr) 1984-08-15
DE3304059C2 (de) 1994-04-14

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