EP0121893A2 - Porte pour un four combiné au gaz ou à l'électricité et aux micro-ondes - Google Patents

Porte pour un four combiné au gaz ou à l'électricité et aux micro-ondes Download PDF

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Publication number
EP0121893A2
EP0121893A2 EP84103654A EP84103654A EP0121893A2 EP 0121893 A2 EP0121893 A2 EP 0121893A2 EP 84103654 A EP84103654 A EP 84103654A EP 84103654 A EP84103654 A EP 84103654A EP 0121893 A2 EP0121893 A2 EP 0121893A2
Authority
EP
European Patent Office
Prior art keywords
door
oven
electric
microwave
glass window
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Withdrawn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
EP84103654A
Other languages
German (de)
English (en)
Other versions
EP0121893A3 (fr
Inventor
Ruggero Roccari
Arturo Negretti
Walter Zanzani
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.)
Industrie Zanussi SpA
Original Assignee
Industrie Zanussi SpA
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 Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Publication of EP0121893A2 publication Critical patent/EP0121893A2/fr
Publication of EP0121893A3 publication Critical patent/EP0121893A3/fr
Withdrawn legal-status Critical Current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
    • H05B6/763—Microwave radiation seals for doors

Definitions

  • the present invention relates to a door for an oven, particularly for a combination oven for domestic use, in which heating and cooking of foods may be carried out by means of conventional gas or electric heating devices and by means of microwaves.
  • Ovens of this type are already known and require the employ of particularly designed doors capable of providign a seal against the escape in particular of microwave radiation.
  • a door for an oven particularly for a combination gas or electric and microwave oven, comprising an outer peripheral frame havign a first glass window secured thereto, an inner door provided with a second glass window, and a perforate metal screen interposed between the two windows.
  • a door of this type is characterized in that the inner door is releasably secured to the outer frame of the door and formed of first and second profile members arranged so as to form first and second microwave traps each having a length equal to one quarter of the wavelength of the radiation employed, and being oriented in mutually perpendicular directions.
  • the door of a conventional oven comprises a frame 12 with an outer glass window 13 secured thereto and provided with a door handle 10.
  • Gasket 9 Interposed between frame 12 and an inner wall 6 of the oven is a conventional sealing gasket 9 for preventing the escape of heat.
  • Gasket 9 may be formed of a microwave-absorbing material such as metallized rubber.
  • This conventional door may be modified in a simple manner according to the invention if it is desired to equip the conventional gas or electric oven with a microwave heating system.
  • a perforate metal screen 2 may be secured internally to frame 12, such screen being adapted to prevent the escape of microwave energy while permitting the oven cavity to be viewed from outside the oven.
  • Screen 2 is formed with a rim portion projecting towards the interior of the oven and fixedly retained by two profile members 5 and 7, with a sealing gasket 4 interposed therebetween.
  • a second glass window 1 serves the purpose of protecting screen 2 and outer glass window 13 from contamination in use of the oven.
  • Frame 12, screen 2 and profile members 5 and 7 may be secured to one another by any suitable means (e.g. screws), permitting the individual components of the door to be quickly and readily dismounted in case of need while ensuring a reliable mechanical connection and good electric contact between the metal structural components.
  • profile members 5 and 7 are of substantially L-shaped configuration, with their edges being provided with suitable sealing gaskets and arranged in the manner shown in the drawing.
  • the outwards- directed edge of profile member 7 is provided with a sealing gasket of a dielectric heat-resistant material.
  • profile members 5 and 7 form a first and a second.microwave trap 3 and 8, respectively, each having a length equal to one quarter ( ⁇ /4) of the wavelength of the radiation employed.
  • Trap 3 is of substantially L-shaped configuration, with its longer leg parallel to the main surface of the door, while trap 8 is oriented in a direction perpendicular to the longer leg of trap 3.
  • This double trap solution is effective to ensure against the escape of radiation through the door, formerly requiring the employ of special metal gaskets in the form of waveguides.
  • the escape of radiation is reliably prevented even if the components of the door are subjected to considerable thermal stresses during manufacture, as during the enamelling process at 800 °C.
  • the present invention enables the existing door of a gas or electric oven to be modified in a simple manner by the addition of a composite inner door structure if the oven is to be modified by the addition thereto of a microwave heating system.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)
  • Constitution Of High-Frequency Heating (AREA)
EP84103654A 1983-04-07 1984-04-03 Porte pour un four combiné au gaz ou à l'électricité et aux micro-ondes Withdrawn EP0121893A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT3401683U IT8334016V0 (it) 1983-04-07 1983-04-07 Porta per forno combinato a gas o elettrico e a microonde.
IT3401683U 1983-04-07

Publications (2)

Publication Number Publication Date
EP0121893A2 true EP0121893A2 (fr) 1984-10-17
EP0121893A3 EP0121893A3 (fr) 1985-04-24

Family

ID=11238672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84103654A Withdrawn EP0121893A3 (fr) 1983-04-07 1984-04-03 Porte pour un four combiné au gaz ou à l'électricité et aux micro-ondes

Country Status (3)

Country Link
EP (1) EP0121893A3 (fr)
ES (1) ES278206Y (fr)
IT (1) IT8334016V0 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0369911A1 (fr) * 1988-11-17 1990-05-23 De Dietrich Europeenne D'electromenager Porte pour enceinte de cuisson mixte comportant un piège à ondes flottant
FR2649188A1 (fr) * 1989-07-03 1991-01-04 Fagor S Coop Ltda Porte perfectionnee pour fours a micro-ondes
US6263830B1 (en) 1999-04-12 2001-07-24 Matrix Integrated Systems, Inc. Microwave choke for remote plasma generator
US20100192935A1 (en) * 2007-07-02 2010-08-05 Electrolux Home Products Corporation N.V. Cooking oven door with a door frame and a door panel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5011108B1 (fr) * 1970-03-03 1975-04-26
CA1030613A (fr) * 1974-06-14 1978-05-02 Amana Refrigeration Joint d'energie pour four a microondes
CA1094644A (fr) * 1977-05-16 1981-01-27 Joseph W. Katona Ensemble de fenetre pour porte de four
DE2854993C2 (de) * 1978-12-20 1982-04-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Tür zum Verschließen des Garraumes eines Mikrowellenofens
US4313044A (en) * 1980-11-05 1982-01-26 General Electric Company Slot configuration for choke seal

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0369911A1 (fr) * 1988-11-17 1990-05-23 De Dietrich Europeenne D'electromenager Porte pour enceinte de cuisson mixte comportant un piège à ondes flottant
FR2649188A1 (fr) * 1989-07-03 1991-01-04 Fagor S Coop Ltda Porte perfectionnee pour fours a micro-ondes
US6263830B1 (en) 1999-04-12 2001-07-24 Matrix Integrated Systems, Inc. Microwave choke for remote plasma generator
US6352050B2 (en) 1999-04-12 2002-03-05 Matrix Integrated Systems, Inc. Remote plasma mixer
US6412438B2 (en) 1999-04-12 2002-07-02 Matrix Integrated Systems, Inc. Downstream sapphire elbow joint for remote plasma generator
US6439155B1 (en) 1999-04-12 2002-08-27 Matrix Integratea Systems Inc. Remote plasma generator with sliding short tuner
US20100192935A1 (en) * 2007-07-02 2010-08-05 Electrolux Home Products Corporation N.V. Cooking oven door with a door frame and a door panel
US8413649B2 (en) * 2007-07-02 2013-04-09 Electrolux Home Products Corporation N.V. Cooking oven door with a door frame and a door panel

Also Published As

Publication number Publication date
ES278206Y (es) 1986-05-16
EP0121893A3 (fr) 1985-04-24
IT8334016V0 (it) 1983-04-07
ES278206U (es) 1985-11-01

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

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Effective date: 19850807

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Effective date: 19870507

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19871118

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ZANZANI, WALTER

Inventor name: ROCCARI, RUGGERO

Inventor name: NEGRETTI, ARTURO