EP0215708A1 - Vorrichtung zum Braten und Bräunen von Produkten in einem Mikrowellenofen und mit einer solchen Vorrichtung ausgerüsteter Ofen - Google Patents

Vorrichtung zum Braten und Bräunen von Produkten in einem Mikrowellenofen und mit einer solchen Vorrichtung ausgerüsteter Ofen Download PDF

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Publication number
EP0215708A1
EP0215708A1 EP86401957A EP86401957A EP0215708A1 EP 0215708 A1 EP0215708 A1 EP 0215708A1 EP 86401957 A EP86401957 A EP 86401957A EP 86401957 A EP86401957 A EP 86401957A EP 0215708 A1 EP0215708 A1 EP 0215708A1
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EP
European Patent Office
Prior art keywords
dry
mixture
weight
aluminum powder
proportion
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Withdrawn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
EP86401957A
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English (en)
French (fr)
Inventor
Laurent Didier
Irena Leszczynska
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.)
Esswein SA
Original Assignee
Esswein 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 Esswein SA filed Critical Esswein SA
Publication of EP0215708A1 publication Critical patent/EP0215708A1/de
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6491—Aspects related to microwave heating combined with other heating techniques combined with the use of susceptors
    • H05B6/6494—Aspects related to microwave heating combined with other heating techniques combined with the use of susceptors for cooking

Definitions

  • the present invention relates to a device for cooking and browning products, in particular food products, in a microwave oven, and a microwave oven provided with such a device.
  • Food products and certain dishes taken out of a cooking carried out in a microwave oven often have an appearance and / or a color judged less enticing or attractive than those of products or dishes cooked or grilled according to a traditional mode of cooking on fire and the heat produced by wood, coal, gas or electricity on a grill, stove or in a conventional oven.
  • Some of these known devices include containers made of material transparent to microwaves, for example certain ceramics or vitroceramics, but comprising at their bottom at their external or internal surface a resistant film often based on metal oxides or ferrites, which absorbs microwave energy heats up and reaches temperatures well above 200 ° C.
  • Other known devices include receptacles made of material transparent to microwaves in which are incorporated ferrites or magnetic oxides which are known for their great ability to absorb microwave energy in order to bring these receptacles to high temperatures situated between 200 ° C and 400 ° C.
  • These known devices or containers allow browning in a microwave oven products or dishes that are in contact with their surface. However, we note that the areas of these products or dishes browned by these known devices are not homogeneous.
  • the periphery of these zones in contact with the parts of these devices fully exposed to the microwaves has a dark color while the center of these zones in contact with the part of these devices hidden in the microwaves by these products or dishes hardly changes their color . If these products or dishes are kept longer in the oven, the periphery of the brown areas of these products is calcined while the center of these areas remains insufficiently browned.
  • the aim of the present invention is to avoid these drawbacks and makes it possible to produce an economical and effective device or container for correctly cooking and browning the products or dishes in a microwave oven and a microwave oven provided with such a device or container.
  • a device or container for cooking and browning products or dishes in a microwave oven is characterized in that it is constituted by a clayey earth supporting high temperatures, in the mass of which is incorporated a homogeneously, a metal in the divided state.
  • a microwave oven 1 illustrated in FIG. 1 comprises an appliance and control compartment 2, a cooking enclosure 3 forming a cavity resonant to the microwaves generated by a source constituted for example by a magnetron 4 and coupled to the cooking enclosure 3 by a waveguide 5 and modified in orientation in predetermined desired directions inside this enclosure 3 by a mode agitator 6 in order to distribute the microwave energy evenly on all parts of the product or dish subjected to cooking, which is supported by a device for cooking and browning 7 arranged on a tray 8 in the cooking chamber 3.
  • the device or container for cooking and browning 7 has a shape d '' a basin whose outline is circular, oval, rectangular, square or polygonal.
  • the device or container for baking and browning 7 is constituted by a material more or less transparent to microwaves and supporting high temperatures, throughout the entire extent of the mass of which is homogeneously incorporated a metal to the divided state that is to say, in the particulate state or powder which increases on the one hand unexpectedly the power of absorption of the energy of the microwaves, and on the other hand its thermal conduction.
  • the device or container for baking and browning 7 is constituted by a clayey earth throughout the entire mass of which is incorporated or suspended in a homogeneous manner an aluminum powder.
  • the device or container for baking or browning is constituted by a clay earth in the mass of which is suspended filings of a metal such as iron, steel, copper.
  • a device or container 7 for baking and browning produced according to the invention an unexpected property of the metal in the divided state in the improvement of the microwave energy absorbing power of the material in which it is incorporated and the property of good metal heat conduction are fully exploited to increase the energy absorbing power of microwaves of this material therefore a good performance of the device and to accelerate a good distribution of heat throughout the extent of this device or container 7 so that during the cooking of a product or dish, the parts of this device or container 7 which are hidden by this product or dish and which directly receive only a residual part of microwave energy radiated for heating, however have practically the same temperature as that of the other parts of this device or container which are fully exposed to microwave energy.
  • the product or dish placed in the device for cooking and browning 7 and subjected to cooking in the microwave oven 1 is uniformly browned throughout the extent of its zones in contact with the surface of this device for cooking and brown 7, which is both a great microwave energy absorber and a good thermal conductor.
  • the device or container for baking and browning is produced with a paste made up by a mixture of an ordinary dry clay soil, abundantly in nature, and an aluminum powder or a dry metal filings in a proportion of 20% to 50% by weight of the total weight of the dry mixture "clay earth- aluminum powder or metal filings "and thinner water.
  • Three curves A, B, C illustrated in FIG. 3 indicate three stages of temperature rise in degrees centigrade as a function of time in minutes of three devices or containers A, B, C for baking and browning 7 having identical shapes and dimensions and made up of pastes formed from mixtures of the same dry clay soil, of a dry aluminum powder respectively in proportions of 20% for A, 30% for B and 50% for C by weight of the total weight of the dry mixture "clay earth-aluminum powder", and water for dilution.
  • the devices or receptacles A, B, C have a temperature of 240 ° C, 255 ° C and 360 ° respectively. C and that if their exposure to microwaves continues these devices or containers A, B, C are brought respectively to around 300 ° C, 320 ° C and 420 ° C. These temperatures are good for browning most food products or dishes and even all these products and dishes because the temperature at which you can start browning certain food items is around 200 ° C.
  • the device or container for baking and browning 7 is produced not with a paste but with shaping under mechanical pressure of a dry mixture of an ordinary clay powdery dry earth and a powder of dry aluminum in a proportion of 5% to 30% by weight of the total weight of this dry mixture.
  • Two curves D, E illustrated in FIG. 4 indicate two stages of temperature rise in degrees centigrade as a function of time in minutes of two devices or containers D, E for baking and browning 7 having shapes and dimensions identical to those of the devices or ABC containers of the first example but produced with mechanical pressure shaping of a dry mixture of the same dry powdery clay soil and of dry aluminum powder respectively in proportions of 20% for D and 15% for E by weight of the total weight of the dry mixture "clay earth - aluminum powder".
  • the devices D, E have a temperature of 600 ° C and 350 ° C respectively and that if their exposure to the microwaves continues , in D is recorded a thermal runaway followed by a reddening and even a fusion while in E are recorded a moderate rise then a stabilization of temperatures.
  • This second example shows that effective devices or containers for baking and browning 7 can be produced with a proportion of dry aluminum powder of the order of 20% by weight of the total weight of a dry mixture "clay earth - powder d 'aluminum".
  • the device or container for cooking and browning is produced with shaping under mechanical pressure of a dry mixture of a dry powdery clay soil, of a dry aluminum powder in a proportion of 5%. to 30% by weight of the total weight of the mixture and of a glass powder in a proportion of 5% to 20% by weight of the total weight of the dry mixture "powdery clay soil - aluminum powder - glass powder".
  • Three curves F, G, H illustrated in FIG. 5, indicate three rates of temperature rise in degrees centigrade as a function of time in minutes of three devices or container F, G, H for baking and browning 7 having identical shapes and dimensions to those of the ABCDE devices or containers of the preceding examples and produced with shaping under mechanical pressure of a dry mixture of the same dry powdery clay soil, of a dry aluminum powder respectively in proportions of 10% for G and H and 15% for F and of a dry glass powder in proportions of 10% for F and G and 15% for H by weight of the total weight of dry mixture "powdery clay earth - aluminum powder - powder of glass".
  • the devices F, G, H have a temperature of 600 ° C, 580 ° C and 550 ° C respectively and that if their continuous microwave exposure is recorded a temperature stabilization respectively around 650 ° C for F, 600 ° C for G and H.
  • a comparison between curves G and H with curve E of the second example shows that an addition of a glass powder in a dry mixture "clay earth - aluminum powder" for an embodiment with shaping under mechanical pressure of a device or container 7, makes it possible to obtain a device or container more effective than that produced with a mixture of clay soil and aluminum powder only and at the same time a reduction in the percentage of aluminum powder in this mixture.
  • a comparison between curves F and G, H shows the influence of the increase in the percentage of aluminum powder in the increase in the thermal capacity of the device or container 7.
  • a device or container for baking and browning 7 is provided with a cover, not shown in a material transparent to microwaves or to low heating by microwave energy such as certain glasses and ceramics, certain plastics and paper.
  • a device or container for baking and browning 7 is provided with a cover represented in broken lines in FIG. 2 in clay soil throughout the whole extent of the mass of which is homogeneously incorporated a metal to the state divided in an identical or analogous manner to the mixture constituting this device or container 7 and indicated in the examples above.
  • a device provided with such a cover the products or dishes are cooked and browned directly by the microwave energy and by the heat imparted by the device or container 7 itself and its cover, heated by this microwave energy.
  • a device or container 7 with its cover produced according to the second and third variants above makes it possible to carry out a stew cooking or a mixed stew and microwave cooking.
  • the cover of the device or container 7 may include grooves 9 or holes not shown intended for the escape of steam or gas from the product or dish during cooking.
  • the removal of the hot device or container 7 from a microwave oven and the introduction or movement of this hot device or container 7 in a microwave oven is usually done by means of gripping accessories of known type.
  • the device or container 7 is coated inside and / or outside by a thin layer of material transparent to microwaves, supporting high temperatures, and not adhering to the products subjected to the cooking in its enclosure.
  • the device or container 7 above is thus easy to maintain and effective in its action of browning the products or dishes subjected to cooking in a microwave oven.
  • the device or container 7 which is easily manufactured from inexpensive raw materials, clay soil abundantly found in nature, glass powder and aluminum powder or metal filings which is easy to make or obtain, is therefore also economical. .

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cookers (AREA)
EP86401957A 1985-09-06 1986-09-05 Vorrichtung zum Braten und Bräunen von Produkten in einem Mikrowellenofen und mit einer solchen Vorrichtung ausgerüsteter Ofen Withdrawn EP0215708A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8513279 1985-09-06
FR8513279A FR2586921B1 (fr) 1985-09-06 1985-09-06 Dispositif pour cuire et brunir les produits dans un four a micro-ondes, et four muni d'un tel dispositif

Publications (1)

Publication Number Publication Date
EP0215708A1 true EP0215708A1 (de) 1987-03-25

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Family Applications (1)

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EP86401957A Withdrawn EP0215708A1 (de) 1985-09-06 1986-09-05 Vorrichtung zum Braten und Bräunen von Produkten in einem Mikrowellenofen und mit einer solchen Vorrichtung ausgerüsteter Ofen

Country Status (2)

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EP (1) EP0215708A1 (de)
FR (1) FR2586921B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294503A1 (de) * 1987-06-10 1988-12-14 Degussa Aktiengesellschaft Verwendung einer edelmetallhaltigen Paste zur Herstellung von Bräunungsgeschirr für Mikrowellenöfen
WO1989011771A1 (en) * 1988-05-16 1989-11-30 Dennison Manufacturing Company Localized microwave radiation heating
EP0374302A1 (de) * 1988-12-23 1990-06-27 Degussa Aktiengesellschaft Bräunungsgeschirr für Mikrowellenöfen
EP0427113A1 (de) * 1989-10-31 1991-05-15 Inwave Ag Industrie Mikrowellentechnik Mikrowellenofen mit Einsatz
WO2020173027A1 (en) * 2019-02-28 2020-09-03 Midea Group Co., Ltd. Sous vide feature in a microwave oven

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1814870A (en) * 1928-05-28 1931-07-14 Warren I Tycer Ceramic vessel and method of producing the same
US3302632A (en) * 1963-12-06 1967-02-07 Wells Mfg Company Microwave cooking utensil
DE1679115A1 (de) * 1966-12-01 1971-04-01 Wmf Wuerttemberg Metallwaren Koch-,Brat- oder Backgeschirr aus hochtemperaturfestem Glas
FR2091156A5 (en) * 1971-05-04 1972-01-14 Vorwerk & Sohn Fillers for rubber compositions to increase - microwave absorption
DE2247967A1 (de) * 1972-02-18 1973-08-30 Tdk Electronics Co Ltd Kochgeschirr fuer mikrowellenofen
FR2261733A1 (de) * 1974-02-25 1975-09-19 Rouaud Brigitte
FR2403710A1 (fr) * 1977-09-19 1979-04-13 Krantz Quentin Article chauffant et methode pour chauffer cet article
WO1980001483A1 (en) * 1979-01-12 1980-07-24 W Haverland Insulated dish and lid for microwave cooking

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5852916A (ja) * 1981-09-25 1983-03-29 Kyocera Corp 電子レンジ用調理器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1814870A (en) * 1928-05-28 1931-07-14 Warren I Tycer Ceramic vessel and method of producing the same
US3302632A (en) * 1963-12-06 1967-02-07 Wells Mfg Company Microwave cooking utensil
DE1679115A1 (de) * 1966-12-01 1971-04-01 Wmf Wuerttemberg Metallwaren Koch-,Brat- oder Backgeschirr aus hochtemperaturfestem Glas
FR2091156A5 (en) * 1971-05-04 1972-01-14 Vorwerk & Sohn Fillers for rubber compositions to increase - microwave absorption
DE2247967A1 (de) * 1972-02-18 1973-08-30 Tdk Electronics Co Ltd Kochgeschirr fuer mikrowellenofen
FR2261733A1 (de) * 1974-02-25 1975-09-19 Rouaud Brigitte
FR2403710A1 (fr) * 1977-09-19 1979-04-13 Krantz Quentin Article chauffant et methode pour chauffer cet article
WO1980001483A1 (en) * 1979-01-12 1980-07-24 W Haverland Insulated dish and lid for microwave cooking

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 137 (M-222)[1282], 15 juin 1983; & JP-A-58 52 916 (KIYOUSERA K.K.) 29-03-1983 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294503A1 (de) * 1987-06-10 1988-12-14 Degussa Aktiengesellschaft Verwendung einer edelmetallhaltigen Paste zur Herstellung von Bräunungsgeschirr für Mikrowellenöfen
WO1989011771A1 (en) * 1988-05-16 1989-11-30 Dennison Manufacturing Company Localized microwave radiation heating
EP0374302A1 (de) * 1988-12-23 1990-06-27 Degussa Aktiengesellschaft Bräunungsgeschirr für Mikrowellenöfen
EP0427113A1 (de) * 1989-10-31 1991-05-15 Inwave Ag Industrie Mikrowellentechnik Mikrowellenofen mit Einsatz
WO2020173027A1 (en) * 2019-02-28 2020-09-03 Midea Group Co., Ltd. Sous vide feature in a microwave oven
US11659634B2 (en) 2019-02-28 2023-05-23 Midea Group Co., Ltd. Sous vide feature in a microwave oven

Also Published As

Publication number Publication date
FR2586921A1 (fr) 1987-03-13
FR2586921B1 (fr) 1988-04-29

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Inventor name: DIDIER, LAURENT