EP1162408A1 - Ofen mit feuerfestem Boden - Google Patents

Ofen mit feuerfestem Boden Download PDF

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Publication number
EP1162408A1
EP1162408A1 EP01490021A EP01490021A EP1162408A1 EP 1162408 A1 EP1162408 A1 EP 1162408A1 EP 01490021 A EP01490021 A EP 01490021A EP 01490021 A EP01490021 A EP 01490021A EP 1162408 A1 EP1162408 A1 EP 1162408A1
Authority
EP
European Patent Office
Prior art keywords
battery
enclosure
oven according
electrical
refractory
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.)
Withdrawn
Application number
EP01490021A
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English (en)
French (fr)
Inventor
Pierre Lancelot
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.)
Eurofours SA
Original Assignee
Eurofours SA
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 Eurofours SA filed Critical Eurofours SA
Publication of EP1162408A1 publication Critical patent/EP1162408A1/de
Withdrawn legal-status Critical Current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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/087—Arrangement or mounting of control or safety devices of electric circuits regulating heat
    • 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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements

Definitions

  • the present invention relates to a static electric heating furnace using works with electrical resistance batteries and a refractory slab on which are arranged the products to be cooked, slab usually called refractory hearth.
  • a first electrical resistance battery is disposed at the level of the enclosure ceiling while a second electrical resistance battery is below refractory hearth.
  • the electrical resistances of this second battery have function of heating the refractory slab.
  • a refractory hearth has only one refractory slab and two batteries of electrical resistance, one called sole under the refractory sole and the other called vault at the level of the enclosure ceiling. If a single oven is not enough, you must equip yourself of several ovens possibly strictly of the same type which are superimposed on the others, each oven having independent operation.
  • the present invention relates to an oven with static electric heating which comprises, in the same enclosure, a first battery of electrical resistance at the level of the ceiling of the enclosure and which, typically, comprises n assemblies each consisting of a refractory hearth and a second electrical resistance battery disposed near and below said refractory hearth, n being greater than 1, namely a lower assembly in the lower part of the enclosure and at least one intermediate assembly.
  • each electric resistance battery of an intermediate assembly provides heating not only refractory hearth below which it is immediately placed but also the volume left free up to the refractory hearth which is below from her.
  • each stage having the structure traditional of a refractory hearth oven with the actual refractory slab, the first battery of higher electrical resistance called vault, above the volume left free for the products to be cooked and a second resistance battery so-called electric sole, which is placed immediately under the refractory slab.
  • the electrical resistance batteries of the assemblies intermediaries act as both bottom and top batteries.
  • the second resistance battery electric is not housed in a room whose upper wall constitutes the sole refractory. According to the invention this second battery is independent of the sole refractory, below which it is placed, which optimizes both the heating of the volume of the floor which it acts as vault battery and of the sole refractory for which it acts as a sole battery.
  • the second electric resistance battery is at short distance d refractory hearth. If this distance is too long, you do not get heating sufficient refractory base and therefore the traditional and traditional cooking aspect of product. If this distance is too short, or even if there is contact with the refractory hearth, we slightly reduce the arch effect but above all we create a heterogeneous distribution the temperature of the refractory hearth, this being warmer in very close to the battery, and we therefore obtain a non-homogeneous cooking appearance on the product.
  • the distance range can be variable depending on the product.
  • a range of d between 0.5 and 1.3 cm is suitable for bakery products.
  • this space can be occupied by a conductive material, for example a metal plate, possibly in contact with both the refractory hearth and said second battery.
  • the distance d can be less than 0.5 cm.
  • the oven can be equipped with means for relative positioning of the refractory hearth relative to the second battery, making it possible to adjust the distance d according to the products. This setting allows the user to favor the sole effect, by decreasing d or vice versa to favor the arch effect by decreasing the sole effect by increasing d .
  • an industrial oven is equipped with a temperature regulation comprising a probe which is placed inside the enclosure. Once the user has set the cooking temperature, the heating of the electric batteries is controlled according to the temperature detected by the probe thermal.
  • the probe thermal advantageously, there is only one probe and this one is placed in the enclosure, at the level of an electrical resistance battery of a intermediate set. This is the temperature of the enclosure at this level location which is most significant for the temperature regulation of the oven.
  • the electrical supply circuit of the batteries of electrical resistance includes, for each battery, an independent contactor which is connected to the temperature control system. So thanks to this provision particular, it is possible to control the power supply of each battery independently of each other, depending on the temperature displayed by the probe thermal.
  • the electrical supply circuit comprises also one or more sequencers, coupled to a contactor, said sequencer being programmed according to the position in the enclosure of the resistance battery electric corresponding to said contactor. Thanks to the presence of couples contactor / sequencer, temperature regulation of the oven can be obtained by adapting the heating duration for each electric resistance battery, according to its positioning in the enclosure.
  • the thermal probe being arranged at a battery of electrical resistance of an intermediate assembly
  • programming of sequencers is such that the interruption time for the battery of the lower assembly is longer important that the upper battery interruption time, itself being longer important that the interruption time for the battery of the assembly (s) intermediaries.
  • the downtime of the lower set is around a third of the time while the interruption time of the upper battery is around 20% of the time.
  • the electrical resistors placed at the interior of the enclosure have a heating power which differs according to their position in the enclosure. Thus there is no longer an interruption in the heating of certain resistors, the power of each being determined once and for all to obtain a uniform temperature throughout the interior volume of the enclosure.
  • the oven 1 is an oven with static electric heating, refractory hearth, comprising two stages 2, 3.
  • Each stage has the structure conventional of a refractory hearth oven, with a refractory slab, called hearth refractory, intended to receive the products to be cooked in the oven and two batteries of electrical resistance, namely a lower battery called sole which is disposed immediately below the refractory hearth and which has the function of heating said sole and a second upper battery called a vault which is arranged at a distance H above the refractory hearth and which has the function of heating the volume of the space located above said sole.
  • the two refractory plates 4,5 are mounted inside the enclosure 9 by means of support angles 10 fixed along the two lateral planes 9 c and 9 d of the enclosure 9.
  • the first refractory plate 4 is arranged just above the lower battery 7, while the second sole 5 is arranged just above the intermediate battery 8, at a distance d from the latter, between 0.5 and 1.3 cm, in particular 0 , 8 cm for a bakery oven.
  • Each stage 2,3 of the furnace 1 has its refractory hearth 4, 5, its battery of sole 7.8 and its arch battery 8.6.
  • Intermediate battery 8 acts as both arch battery for the lower stage 2 and floor battery for the upper stage 3.
  • n - 1 assemblies constituted by a sole 5 and a battery 8 intermediate.
  • each intermediate battery acts as both a battery vault for the interior volume of the floor located below the said battery and hearth battery for the refractory hearth placed just above it.
  • a battery 6, 7, 8 is composed of a plurality of electrical resistors 11 generally in the form of a rod having two straight portions joined by an elbow, the free ends of the two straight portions being fixed in the vertical plane 9 e , constituting the bottom of the enclosure 9 and being connected to the electrical supply circuit.
  • each battery 6, 7, 8 therefore consists of three electrical resistors 11 whose rectilinear portions are substantially in the same horizontal plane and are parallel to each other.
  • all the electrical resistors composing all the batteries of the oven are identical.
  • the choice of the distance d ensures the balance between the sole effect and the arch effect, filled by the intermediate battery 8.
  • a distance d too small for example less than 0.5 cm, results in a heterogeneity of cooking on the products placed on the floor 5, because the heating of the floor is preferably done in the areas close to the electrical resistances.
  • a distance d too large for example greater than 1.3 cm, considerably reduces the sole effect and the products placed on the sole 5 do not have the desired traditional and artisanal cooking appearance.
  • the distance d was 0.8 cm for a sole 5 of 2 cm thick and electrical resistors 11 of 1 cm in diameter.
  • the arch height H was 165 mm.
  • the distance d can possibly be adjusted, by moving the support angles 10 in height, by any suitable means.
  • the space 40 between the refractory hearth 5 and the electrical resistance battery 8 can be occupied in whole or in part by a conductive material, promoting the distribution homogeneous heat over the entire surface of the sole 5. It can be a plate metallic.
  • FIG. 3 shows the operating principle of the diagram electric for regulating oven 1 in temperature.
  • the regulation system comprises a thermal probe 12, the regulator of temperature proper 13 and in the power supply circuit three contactors 16,17,18 coupled to three sequencers 26,27,28 via three switches 36,37,38.
  • the thermal probe 12 is arranged, in the example illustrated in FIG. 3, under the intermediate sole 5 between two electrical resistors 11 of the intermediate battery 8.
  • the temperature regulator 13 is accessible to the user, being placed on the front part 14 of the oven 1, next to the door 15 closing the enclosure 9, in the example illustrated in Figure 1.
  • This is a manually operated regulator with adjustment knobs and temperature graduated scale. This is of course not exhaustive of the invention.
  • the electrical supply circuit includes, for each battery 6, 7, 8, a contactor 16,17,18, which is coupled to a sequencer 26,27, 28 by a switch 36, 37, 38. In addition, it has two general switches, one 29 accessible to the user who corresponds to the on / off button and the other 30 who is connected to the temperature controller 13.
  • Each sequencer 26,27 and 28 is programmed to interrupt possibly, thanks to the corresponding switch 36,37, 38 the power supply electric batteries 6, 7, 8 depending on the location of said batteries in the interior volume of the enclosure 9.
  • the oven is heated according to the above-mentioned operating cycles and is interrupted by the main switch 3O, when the temperature measured by the thermal probe 12 reaches that desired by the user.
  • the interior temperature of the oven, measured by the sensor drops below a determined threshold, the cycles of operation of the three batteries 6, 7, 8 resume according to the planned sequencing.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Resistance Heating (AREA)
EP01490021A 2000-06-09 2001-06-08 Ofen mit feuerfestem Boden Withdrawn EP1162408A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0007437A FR2810102B1 (fr) 2000-06-09 2000-06-09 Four a sole refractaire
FR0007437 2000-06-09

Publications (1)

Publication Number Publication Date
EP1162408A1 true EP1162408A1 (de) 2001-12-12

Family

ID=8851161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01490021A Withdrawn EP1162408A1 (de) 2000-06-09 2001-06-08 Ofen mit feuerfestem Boden

Country Status (2)

Country Link
EP (1) EP1162408A1 (de)
FR (1) FR2810102B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20090979A1 (it) * 2009-12-11 2011-06-12 Indesit Co Spa "apparato per la cottura di alimenti"
EP4303494A1 (de) * 2022-07-08 2024-01-10 Roller Grill International Vorrichtung zum auftauen/erhitzen/erhitzen von lebensmitteln, insbesondere auf teigbasis, wie pizza oder torten

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB958618A (en) * 1962-03-28 1964-05-21 R & A Main Ltd Improvements in or relating to electrically heated ovens
US4215266A (en) * 1978-12-21 1980-07-29 Smith Gilbert L Baking oven
DE3046163A1 (de) * 1980-12-06 1982-09-09 Gaggenau-Werke Haus- Und Lufttechnik Gmbh, 7560 Gaggenau Zusatzheizeinrichtung fuer einen elektrobackofen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB958618A (en) * 1962-03-28 1964-05-21 R & A Main Ltd Improvements in or relating to electrically heated ovens
US4215266A (en) * 1978-12-21 1980-07-29 Smith Gilbert L Baking oven
DE3046163A1 (de) * 1980-12-06 1982-09-09 Gaggenau-Werke Haus- Und Lufttechnik Gmbh, 7560 Gaggenau Zusatzheizeinrichtung fuer einen elektrobackofen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20090979A1 (it) * 2009-12-11 2011-06-12 Indesit Co Spa "apparato per la cottura di alimenti"
EP2333420A1 (de) * 2009-12-11 2011-06-15 Indesit Company S.p.A. Gerät zum Kochen von Lebensmitteln
EP4303494A1 (de) * 2022-07-08 2024-01-10 Roller Grill International Vorrichtung zum auftauen/erhitzen/erhitzen von lebensmitteln, insbesondere auf teigbasis, wie pizza oder torten
FR3137538A1 (fr) * 2022-07-08 2024-01-12 Roller Grill International Appareil de décongélation/réchauffage/cuisson pour aliment, en particulier à base de pâte telle qu’une pizza ou une tarte

Also Published As

Publication number Publication date
FR2810102B1 (fr) 2003-04-18
FR2810102A1 (fr) 2001-12-14

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