EP0406728B1 - Four à micro-ondes avec une fenêtre transparente thermoréfléchissante - Google Patents

Four à micro-ondes avec une fenêtre transparente thermoréfléchissante Download PDF

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Publication number
EP0406728B1
EP0406728B1 EP90112484A EP90112484A EP0406728B1 EP 0406728 B1 EP0406728 B1 EP 0406728B1 EP 90112484 A EP90112484 A EP 90112484A EP 90112484 A EP90112484 A EP 90112484A EP 0406728 B1 EP0406728 B1 EP 0406728B1
Authority
EP
European Patent Office
Prior art keywords
microwave
viewing window
metallic reflection
reflection surfaces
metal
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
EP90112484A
Other languages
German (de)
English (en)
Other versions
EP0406728A3 (en
EP0406728A2 (fr
Inventor
Helmut Dipl.-Ing Hess
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.)
BOSCH-SIEMENS HAUSGERAETE GMBH
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0406728A2 publication Critical patent/EP0406728A2/fr
Publication of EP0406728A3 publication Critical patent/EP0406728A3/de
Application granted granted Critical
Publication of EP0406728B1 publication Critical patent/EP0406728B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • H05B6/766—Microwave radiation screens for windows

Definitions

  • This coating of the above-mentioned glass pane should appear matt to the viewer and reflect infrared light.
  • the invention is based on the object of designing a microwave household appliance of the type mentioned in the preamble of claim 1 in such a way that, in addition to microwave stability, the see-through window is at the same time designed to reflect heat rays without being destroyed by microwave operation.
  • this object is achieved in that, on the viewing window, metallic reflection surfaces are applied which are separated from one another by a metal-free grid and which directly face the cooking chamber and reflect heat radiation striking the viewing window into the cooking chamber in such a way that the dimensions of the metal-free grid are chosen so that that the metallic reflective surfaces from microwave flashovers are protected and that the total area of the metallic reflection areas to the area of the see-through window behaves at least as 4: 5.
  • the presence of such a coating on the see-through window during operation of the microwave household appliance of the above-mentioned type ensures that the see-through window is microwave-proof in combination heating operation and at the same time the thermal radiation emanating from the thermal heater, which is directed onto the see-through window, is reflected into the cooking chamber.
  • microwave resistance means that the metallic reflection surface is not destroyed by microwaves, but at the same time it is achieved that this coating represents a shield for microwaves, which can therefore no longer pass through the viewing window to the outside.
  • This coating also has a shielding function.
  • the very thin, transparent metal layer forming the coating, for example by evaporation, is a few thousandths of a millimeter thick and therefore, on the one hand, does not or hardly hinders the transparency of the viewing window.
  • Figure 1 shows a microwave household appliance in a perspective view, relating to a stove with combination heating.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Claims (5)

  1. Appareil ménager à micro-ondes, en particulier four à micro-ondes, qui comporte un dispositif de chauffage par micro-ondes et un dispositif de chauffage thermique pour le volume de traitement, dans lequel le volume de traitement peut être clos par une porte étanche aux micro-ondes comportant une fenêtre d'inspection, caractérisé en ce que des surfaces réfléchissantes métalliques (6) séparées les unes des autres par une grille dépourvue de métal (7) sont appliquées sur la fenêtre d'inspection (5), surfaces qui sont directement tournées vers le volume de cuisson (2) et réfléchissent le rayonnement de chaleur dans le volume de cuisson (2) qui atteint la fenêtre d'inspection (5), en ce que les dimensions de la grille dépourvue de métal (7) sont choisies de manière que les surfaces réfléchissantes métalliques (6) soient protégées des tensions de contournement liées à la technique des micro-ondes, et en ce que la surface d'ensemble des surfaces réfléchissantes métalliques (6) soit en proportion d'au moins 4:5 par rapport à la surface de la fenêtre d'inspection (5).
  2. Appareil ménager à micro-ondes selon la revendication 1, caractérisé en ce que la structure géométrique de la grille dépourvue de métal (7) et des surfaces réfléchissantes métalliques (6) isole la fenêtre d'inspection (5) de façon étanche aux micro-ondes.
  3. Appareil ménager à micro-ondes selon la revendication 1, caractérisé en ce que les surfaces réfléchissantes métalliques (6) sont assez transparentes pour ne pas occulter la vision du volume de cuisson (2).
  4. Appareil ménager à micro-ondes selon la revendication 1, caractérisé en ce que la surface réfléchissante métallique (6) est métallisée sous vide sur la fenêtre d'inspection (5).
  5. Appareil ménager à micro-ondes selon la revendication 1, caractérisé en ce que la surface réfléchissante métallique (7) est appliquée sur la fenêtre d'inspection (5) par une technique de film mince.
EP90112484A 1989-07-07 1990-06-29 Four à micro-ondes avec une fenêtre transparente thermoréfléchissante Expired - Lifetime EP0406728B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3922443A DE3922443C3 (de) 1989-07-07 1989-07-07 Mikrowellenofen mit einem wärmereflektierenden Durchsichtfenster
DE3922443 1989-07-07

Publications (3)

Publication Number Publication Date
EP0406728A2 EP0406728A2 (fr) 1991-01-09
EP0406728A3 EP0406728A3 (en) 1991-05-29
EP0406728B1 true EP0406728B1 (fr) 1994-12-07

Family

ID=6384537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90112484A Expired - Lifetime EP0406728B1 (fr) 1989-07-07 1990-06-29 Four à micro-ondes avec une fenêtre transparente thermoréfléchissante

Country Status (5)

Country Link
EP (1) EP0406728B1 (fr)
AT (1) ATE115269T1 (fr)
DD (1) DD298024A5 (fr)
DE (2) DE3922443C3 (fr)
ES (1) ES2065440T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3204677B2 (ja) * 1991-03-14 2001-09-04 株式会社東芝 電子レンジ
DE4328086A1 (de) * 1993-08-20 1995-02-23 Bosch Siemens Hausgeraete Anordnung zur Durchführung eines Trocknungsverfahrens
DE4423100C1 (de) * 1994-07-01 1995-07-20 Schott Glaswerke Mikrowellenherd mit einer Türe mit Abschaltsicherung
DE10307217B4 (de) * 2003-02-20 2006-04-13 Schott Ag Tür mit Sichtfenster für Mikrowellengeräte

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7230836U (de) * 1973-03-15 Jenewein & Gapp Gmbh Mit einer HF-strahlungssicheren Einblicköfifnung versehene Türwandung für Mikrowellenherde
DE7224332U (de) * 1972-06-29 1973-03-01 Siemens Gmbh Backofentür mit beschichteter Glasplatte
US3892224A (en) * 1974-09-03 1975-07-01 Shatterproof Glass Corp Oven doors
DE3032998A1 (de) * 1980-09-02 1982-04-08 Bosch Siemens Hausgeraete Mikrowellenofen
DE3144493A1 (de) * 1981-11-09 1983-05-19 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Gargeraet, insbesondere backofen
DE3615272C1 (de) * 1986-05-06 1987-03-05 Heraeus Gmbh W C Mikrowellenfestes Geschirrteil
DE3644276A1 (de) * 1986-12-23 1988-07-07 Bosch Siemens Hausgeraete Mikrowellenherd
DE8701978U1 (fr) * 1987-02-10 1987-07-23 Flachglas Ag, 8510 Fuerth, De

Also Published As

Publication number Publication date
DE3922443A1 (de) 1991-01-10
ATE115269T1 (de) 1994-12-15
DE3922443C2 (fr) 1992-03-12
DE3922443C3 (de) 1996-04-25
DE59007909D1 (de) 1995-01-19
DD298024A5 (de) 1992-01-30
ES2065440T3 (es) 1995-02-16
EP0406728A3 (en) 1991-05-29
EP0406728A2 (fr) 1991-01-09

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