EP0834701B1 - Four de cuisson avec une joint de porte à ventilation interne - Google Patents

Four de cuisson avec une joint de porte à ventilation interne Download PDF

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Publication number
EP0834701B1
EP0834701B1 EP97115980A EP97115980A EP0834701B1 EP 0834701 B1 EP0834701 B1 EP 0834701B1 EP 97115980 A EP97115980 A EP 97115980A EP 97115980 A EP97115980 A EP 97115980A EP 0834701 B1 EP0834701 B1 EP 0834701B1
Authority
EP
European Patent Office
Prior art keywords
door seal
baking oven
air
door
seal
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
EP97115980A
Other languages
German (de)
English (en)
Other versions
EP0834701A1 (fr
Inventor
Dieter Weiss
Konrad Bleier
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP0834701A1 publication Critical patent/EP0834701A1/fr
Application granted granted Critical
Publication of EP0834701B1 publication Critical patent/EP0834701B1/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
    • F24C15/006—Arrangements for circulation of cooling air
    • 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
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F24C15/021—Doors specially adapted for stoves or ranges sealings for doors or transparent panel

Definitions

  • the invention relates to an oven with an oven muffle, one oven door and one between the oven door and the front of the oven muffle arranged door seal.
  • Door seals for ovens that lock the oven door against the Sealing the front of the oven muffle are in many Embodiments known. You are at the front of the Oven muffle or attached to the oven door and either as angled, laterally open silicone hoses or designed as metal mesh strands.
  • silicone seals also for pyrolysis devices were used, this was with a significant design effort connected to the front of the device to be designed so that sufficient in the area of the seal low temperatures prevail, i.e. that of silicone seals maximum tolerable limit temperatures of Do not exceed 250 to 270 ° C.
  • pyrolysis devices are currently mostly used metal mesh seals filled with glass mesh are used, that during pyrolytic self-cleaning withstand the very high operating temperatures. Due to the high thermal expansion of this type of seal however, when attaching the seal Special arrangements are made to ensure satisfactory To ensure sealing. Also are these seals are heavy in their porous surface structure cleaned and hardened grease with time, which reduces the sealing effect. About that assembly is also difficult.
  • US-A-3 812 316 shows a door seal for an oven with pyrolytic self-cleaning.
  • the invention lies in consideration of the above State of the art based on the technical problem, an oven with improved door seal, in particular for pyrolysis devices or other ovens with very high To create operating temperatures.
  • This problem is in an oven of the type described Art solved in that he has a door seal ventilation system for cooling the door seal with in your Air flowing inside.
  • the door seal as a hollow profile with a continuous interior formed and has an air inlet opening and Air outlet opening.
  • a door seal air duct with a blower is provided in the area of the air inlet opening the door seal has a higher air pressure than in the area of the air outlet opening of the door seal generate so that cooling air due to the air pressure difference positively guided through the interior of the door seal flows.
  • Components of the invention are thus a hollow profile trained door seal and a coordinated Air routing, which is generally called a door seal ventilation system can designate.
  • a door seal ventilation system By the inside of the hollow profile flowing air can act on the door seal Temperatures even at higher operating temperatures of the oven are kept so low that the maximum compatible with the respective sealing material Temperatures are not exceeded. This makes one weakening of material due to high temperatures counteracted and thus the life of the door seal elevated. It is also possible to use materials with a lot good sealing properties, but relatively low maximum tolerable temperatures as standard in ovens to use.
  • the door seal designed as a hollow profile is preferably closed on the side.
  • the door seal For the function of the door seal, it is sufficient if it has one only air inlet opening to enter through the Door seal air duct generated and to the air inlet opening guided cooling air and a single air outlet to exit through the door seal has flowed cooling air.
  • the door seal also has several air inlet openings and / or include air outlet openings can. For the sake of clarity, the following is however predominantly from “the air inlet opening” and “the air outlet opening” spoken.
  • the door seal can in principle be made in one piece his.
  • the air inlet opening and the air outlet opening are located here essentially side by side.
  • a one piece Training the door seal leads to the fact that there is a strong temperature gradient in the direction of flow of the cooling air trains. Therefore the door seal is preferred divided into two sealing strands, each Sealing strip as a hollow profile with a continuous Interior is formed and at least one each Air inlet opening and at least one air outlet opening having.
  • the corresponding ones are in each case Air inlet openings and the corresponding ones Air outlet openings of the sealing strands in areas with the same air pressure.
  • both strands are essentially the same length are, i.e. one half of the circumference of the oven door seal against the front of the oven muffle. It can be a common at the corresponding ends Air inlet opening and / or a common one Air outlet opening should be available.
  • An advantageous design of the door seal can provide that they are at their air inlet opening and / or their Air outlet opening for connecting the door seal the door seal air duct has a sealing edge. This sealing edge works with one on the seal side Provided at the end of the door seal air duct, the air inlet and / or air outlet opening opposite Sealing surface together. This makes a closed one Connection space formed and a forced routing of the cooling air and therefore sufficient to cool the door seal large air transition between the door seal air duct and the air inlet opening and / or the air outlet opening causes.
  • a well sealing connection of the air inlet and / or Air outlet openings of the door seal to the door seal air duct is particularly advantageous if the Door seal, as is preferably suggested, on the Oven door is attached and thus a larger constructive and spatial separation of seal and air supply exists as with one on the front of the oven muffle attached door seal. An attachment of the Ventilated door seal on the front of the oven muffle is also possible.
  • the air can exit the cooling air from the door seal Air outlet opening also as, for example, a perforated or slot-shaped material recess without a specially shaped one Sealing edge be realized.
  • a perforated or slot-shaped material recess without a specially shaped one Sealing edge be realized.
  • the same can apply to the realization of the air inlet opening.
  • the inside diameter of the hollow profile is approx. 6 to 8 mm.
  • the outer diameter measures approximately 10 to 12 mm.
  • Fig. 1 shows an oven 1 according to the invention with a Oven muffle 2, an oven door shown in dashed lines 4 and one between the oven door 4 and the Front 3 of the oven muffle 2 arranged door seal 10.
  • the hollow profile 11 with a continuous interior trained door seal 10 two sealing strands 10a and 10b, which are essentially the same length and each one half of the circumference of the oven door 4 against the Seal the front 3 of the oven muffle 2.
  • the two Sealing strands 10a and 10b each have at their ends a common air inlet opening 12 and a common one Air outlet opening 13, which, based on the lower or upper horizontal section of the door seal 10, are each arranged essentially in the middle.
  • the arrows 16 and 17 mark the respective predetermined by the sealing strip 10a or 10b Partial flow path of the cooling air inside the door seal 10th
  • the door seal ventilation system 30 which consists of the internally ventilated door seal 10 and one Door seal air duct 20 exists.
  • the door seal air duct 20 includes the elements used to cool the The door seal generates and guides the required cooling air the door seal. To do this, it points outside the Oven muffle 2 arranged fan 21, for example a radial fan or a cross flow fan can be and in the case shown between one Oven muffle wall 7 and a rear oven outer plate 6c lies.
  • a first flow path section 24 of the door seal air duct 20 for the cooling air from the blower 21 to the door seal 10 is determined by an outflow channel 29a which through the oven muffle wall 7, a lower oven outer plate 6a, the rear oven outer plate 6c and lateral outer sheets is formed.
  • the flow path from the blower 21 to the door seal 10 is considered as a whole Pressure side 22 of the door seal air duct 20 designated. There is a pressure side 22 in comparison to the surroundings of the oven 1 increased air pressure.
  • the air inlet opening 12 of the door seal 10 is on the pressure side 22 of the door seal air duct 20 is arranged.
  • 23 under suction side the path from the door seal 10 to the suction side connection to understand the blower 21.
  • the oven muffle wall 7, an upper oven outer plate 6b, the rear Oven outer plate 6c and side outer plates form an inflow channel 29b, which has a second flow path section 28 of the door seal air duct 20 for the cooling air to the blower 21 determined.
  • the air outlet 13 of the door seal 10 is on the suction side 23 of the door seal air duct 20 is arranged.
  • the cooling of the door seal 10 is effected in that Cooling air due to a between the air inlet opening 12 and the air outlet opening 13 existing air pressure difference flows through the hollow profile 11. It is advantageous if the door seal air duct 20 as shown a defined print page 22 and a defined one Has suction side 23. Due to the arrangement of the air outlet opening 13 on the suction side 23 is the differential pressure and thus increases the flow and the cooling effect.
  • a door seal air duct can also be used be, whose blowers the cooling air in the area of the rear oven outer plate 6c immediately sucks the environment, then the air outlet 13 is opened directly into the ambient air, so that the differential pressure only from the overpressure on the pressure side 22 of the air duct 20 results.
  • the continuous cooling of the door seal 10 has the significant advantage that even with pyrolysis or other ovens with very high operating temperatures for example based on silicone rubber, can be used without this cooling cannot withstand the high operating temperatures would.
  • the cooling air flows in the vertical sections of the door seal 10 from the bottom up
  • the thermal flow behavior supports air transportation. Exploiting the thermal flow behavior of air has the advantage that the blower 21 can be made smaller. Also an embodiment in which the inlet opening 12 in the upper horizontal section of the door seal 10 and the outlet opening 13 in the lower horizontal section the door seal 10 is located, however, under May be beneficial.
  • the door seal cooling air is thus a subset of the Cooling air of the jacket cooling. This will be part of the heated jacket cooling air on the pressure side 22 of the Blower 21 before leaving the oven 1 on the Door seal air duct 20 of the air inlet opening 12 fed.
  • the equipment of the oven 1 with only one of both Door seal and blower cooling fans 21 reduces the space to be accommodated outside the oven muffle 2 technical equipment, lowers manufacturing costs and reduces the need for repairs Oven 1.
  • the door seal ventilation system 30 is the pressure side 22 advantageously at the lower horizontal section and the suction side 23 at the upper horizontal section of the Door seal 10 connected. This arrangement will the part of the door seal not used for cooling Jacket cooling air in the lower front area of the oven 1 released into the ambient air. This will Operator looking through the oven door into the oven muffle 2 not from the jacket cooling air flow Blown face.
  • FIG. 3 and 4 are cross sections through the lower horizontal section the door seal 10 along the lines II-II and III-III from Fig. 1. They illustrate the interaction the door seal 10 and the door seal air duct 20 within the door seal ventilation system 30.
  • Fig. 3 shows the connection of the door seal 10 to the door seal air duct 20
  • Fig. 4 shows the arrangement outside represents the connection area.
  • both figures is designed as a hollow profile 11, with one of the Attachment serving profile extension 14 equipped
  • Door seal 10 can be seen by means of an oven door side provided, cross-section hook-shaped mounting rail 8 is attached to the oven door 4.
  • the oven door 4 has a suitable groove for receiving the door seal so that it does not protrude so far.
  • the storage in a groove acts to warp and thermal expansion-related migration of the door seal opposite.
  • Fig. 3 is the air inlet opening 12 of the door seal 10 seen in cross section. It can be clearly seen that the hollow profile 11 of the door seal 10 on one side Air inlet opening 12 is open.
  • the air inlet opening 12 has a thickened sealing edge 15 on the ring-shaped in the spatial training is, for example, lip-shaped or bead-like can be.
  • the sealing edge 15 acts with an air duct side provided sealing surface 25 under training a closed connection space 18 together in such a way that he closes the oven door 4 against the from the front 3 of the oven muffle 2 and the lower one Oven outer plate 6a formed sealing surface 25 pressed and forms a flat connection contact with it.
  • the cooling air enters the terminal space 18 and thus in the air inlet opening 12 of the door seal 10.
  • FIG 4 shows one outside the air inlet opening 12 lying cross section through the lower horizontal section the door seal 10. It can be seen that the Door seal 10 formed here without an exit gap Sealing surface 25 is present.
  • the figure shows optional here existing, for example, slit-shaped Outlet openings 26 on the front of the lower outer plate 6a, through which part of the cooling air which the Jacket cooling of the oven muffle 2 is used in the ambient air exit.
  • the cooling air throughput depends on the door seal 10 of numerous influencing factors, in particular of the strength of the blower 21, the cross section of the outflow channel 29a, the dimension of the outlet gap 31, the Size of the air inlet opening 12, the diameter of the Hollow profile 11 and the dimensions of the optional outlet openings 26 from.
  • the influencing factors can Specialist in order to vary in order the required cooling air throughput through the door seal and the cooling air flow rate that may be required to realize for jacket cooling.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Gasket Seals (AREA)
  • Electric Ovens (AREA)
  • Furnace Details (AREA)

Claims (12)

  1. Four de cuisson (1) comprenant une enceinte de cuisson (2), une porte (4) de four et un joint de porte (10) situé entre la porte (4) du four et le côté frontal (3) de l'enceinte de cuisson (2),
    caractérisé en ce que
    il comprend un système (30) de ventilation du joint de porte servant à refroidir le joint de porte (10) avec de l'air s'écoulant à l'intérieur de celui-ci,
    le joint de porte (10) étant exécuté en tant que profil creux (11) avec un espace intérieur continu, une ouverture d'entrée d'air (12) et une ouverture de sortie d'air (13), et
    une circulation d'air (20) pour le joint de porte avec un ventilateur (21) étant prévue, laquelle circulation d'air produit une pression d'air plus grande dans la zone de l'ouverture d'entrée d'air (12) du joint de porte (10) que dans la zone de l'ouverture de sortie d'air (13) du joint de porte (10), de manière à ce que l'air de refroidissement s'écoule à travers l'espace intérieur du joint de porte (10) par un guidage forcé en raison de la différence de pression d'air.
  2. Four de cuisson selon la revendication 1, caractérisé en ce que le joint de porte (10) comprend deux cordons d'étanchéité (10a, 10b), chaque cordon d'étanchéité (10a, 10b) étant exécuté en tant que profil creux (11) avec un espace intérieur continu à travers lequel s'écoule l'air de refroidissement.
  3. Four de cuisson selon la revendication 2, caractérisé en ce qu'un premier cordon d'étanchéité (10a) et un second cordon d'étanchéité (10b) du joint de porte (10) ont essentiellement la même longueur, les cordons d'étanchéité (10a, 10b) étanchéifient chacun une moitié de la circonférence de la porte (4) du four vis-à-vis du côté frontal (3) de l'enceinte de cuisson (2) et comprennent, à leurs extrémités respectives correspondantes, une ouverture d'entrée d'air (12) commune et/ou une ouverture de sortie d'air (13) commune.
  4. Four de cuisson selon l'une des revendications précédentes, caractérisé en ce que l'on prévoit, au niveau de l'extrémité de la circulation d'air (20) pour le joint de porte située sur le côté du joint, une surface d'étanchéité (25) opposée à l'ouverture d'entrée d'air (12) et/ou à l'ouverture de sortie d'air (13) du joint de porte (10), et le joint de porte (10) comprend, au niveau de l'ouverture d'entrée d'air (12) et/ou de l'ouverture de sortie d'air (13), un bord d'étanchéité (15) qui coopère de manière étanche avec la surface d'étanchéité (25).
  5. Four de cuisson selon l'une des revendications précédentes, caractérisé en ce que le joint de porte (10) contient du caoutchouc silicone.
  6. Four de cuisson selon l'une des revendications précédentes, caractérisé en ce que le joint de porte (10) est installé sur la porte (4) du four.
  7. Four de cuisson selon l'une des revendications précédentes, caractérisé en ce que l'ouverture d'entrée d'air (12) est située dans le segment horizontal inférieur du joint de porte (10) et l'ouverture de sortie d'air (13) est située dans le segment horizontal supérieur du joint de porte 10), de manière à ce que l'air de refroidissement s'écoule du bas vers le haut à l'intérieur du joint de porte (10).
  8. Four de cuisson selon la revendication 7, caractérisé en ce que l'ouverture d'entrée d'air (12) et l'ouverture de sortie d'air (13) sont situées de manière essentiellement centrale dans les segments horizontaux du joint de porte (10).
  9. Four de cuisson selon l'une des revendications précédentes, caractérisé en ce que l'ouverture d'entrée d'air (12) du joint de porte (10) est située sur le côté de refoulement (22) de la circulation d'air (20) pour le joint de porte.
  10. Four de cuisson selon la revendication 9, caractérisé en ce que la circulation d'air (20) pour le joint de porte comprend non seulement un côté de refoulement (22), mais également un côté d'aspiration (23), et l'ouverture de sortie d'air (13) est située sur le côté d'aspiration (23) de la circulation d'air (20) pour le joint de porte.
  11. Four de cuisson selon l'une des revendications précédentes, caractérisé en ce que la circulation d'air (20) pour le joint de porte comprend un ventilateur (21) situé à l'extérieur de la paroi postérieure de l'enceinte de cuisson (2) et un segment (24, 28) de trajet d'écoulement s'étendant entre la paroi (7) de l'enceinte de cuisson et les tôles extérieures (6a, 6b, 6c) du four.
  12. Four de cuisson selon la revendication 11, caractérisé en ce que le four (1) comprend un refroidissement périphérique équipé d'un ventilateur (21), le ventilateur (21) pour le refroidissement périphérique de l'enceinte de cuisson (2) servant, en même temps, de ventilateur (21) pour la circulation d'air (20) pour le joint de porte, et l'air de refroidissement pour le joint de porte (10) est une partie de l'air de refroidissement pour le refroidissement périphérique de l'enceinte de cuisson (2).
EP97115980A 1996-10-05 1997-09-13 Four de cuisson avec une joint de porte à ventilation interne Expired - Lifetime EP0834701B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19641109A DE19641109A1 (de) 1996-10-05 1996-10-05 Backofen mit innenbelüfteter Türdichtung
DE19641109 1996-10-05

Publications (2)

Publication Number Publication Date
EP0834701A1 EP0834701A1 (fr) 1998-04-08
EP0834701B1 true EP0834701B1 (fr) 2001-11-28

Family

ID=7807952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97115980A Expired - Lifetime EP0834701B1 (fr) 1996-10-05 1997-09-13 Four de cuisson avec une joint de porte à ventilation interne

Country Status (3)

Country Link
EP (1) EP0834701B1 (fr)
DE (2) DE19641109A1 (fr)
ES (1) ES2168561T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19806281A1 (de) * 1998-02-16 1999-08-19 Bosch Siemens Hausgeraete Gargerät mit thermischer Dichtung
DE19935836C2 (de) * 1999-07-29 2001-08-09 Bsh Bosch Siemens Hausgeraete Gargerät mit einem Dichtungsprofil und entsprechendes Dichtungsprofil
DE10208334B4 (de) * 2002-02-27 2020-12-17 BSH Hausgeräte GmbH Haushaltsgerät
US7375310B2 (en) 2003-07-21 2008-05-20 Lg Electronics, Inc. Air flow system for circulating air in a microwave oven
EP2505924A1 (fr) 2011-03-30 2012-10-03 Electrolux Home Products Corporation N.V. Four de cuisson avec cadre frontal et pivot de porte de four assemblé sur ce cadre frontal
DE102014202443A1 (de) * 2014-02-11 2015-08-13 BSH Hausgeräte GmbH Kühlen von Türkomponenten

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384067A (en) * 1966-07-25 1968-05-21 Norris Thermador Corp Forced air cooling and ventilating system for self-cleaning oven
US3812316A (en) * 1973-03-28 1974-05-21 Gen Electric Door seal gasket for combined microwave and self-cleaning oven
DE2929837C2 (de) * 1979-07-23 1981-08-27 Donges Stahlbau Gmbh, 6100 Darmstadt Schlauchförmige Kantenleiste für kraftbetriebene Torflügel o.dgl.
US4601279A (en) * 1984-07-10 1986-07-22 Societe De Dietrich Pyrolytic self-cleaning domestic oven with improved means for protecting electronic panel and controls from heat damages
DE8707959U1 (fr) * 1986-06-13 1987-10-15 Exte-Extrudertechnik Gmbh, 5272 Wipperfuerth, De
DE9015034U1 (fr) * 1990-11-01 1991-11-14 Phoenix Ag, 2100 Hamburg, De
US5085204A (en) * 1991-07-17 1992-02-04 Moyer James D Mounting of door gasket
GB2262601B (en) * 1991-12-19 1995-02-08 Stoves Ltd Improvements in and relating to cookers
DE9409895U1 (de) * 1994-06-18 1994-09-08 Wiesheu Wiwa Gmbh Ofen zur Wärmebehandlung von Lebensmitteln

Also Published As

Publication number Publication date
DE19641109A1 (de) 1998-04-09
DE59705523D1 (de) 2002-01-10
ES2168561T3 (es) 2002-06-16
EP0834701A1 (fr) 1998-04-08

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