EP0243025A2 - Mikrowellenöfen - Google Patents

Mikrowellenöfen Download PDF

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Publication number
EP0243025A2
EP0243025A2 EP87302914A EP87302914A EP0243025A2 EP 0243025 A2 EP0243025 A2 EP 0243025A2 EP 87302914 A EP87302914 A EP 87302914A EP 87302914 A EP87302914 A EP 87302914A EP 0243025 A2 EP0243025 A2 EP 0243025A2
Authority
EP
European Patent Office
Prior art keywords
cavity
air
microwave oven
fan
compartment
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Withdrawn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
EP87302914A
Other languages
English (en)
French (fr)
Other versions
EP0243025A3 (de
Inventor
Kenneth Ian Eke
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.)
Microwave Ovens Ltd
Original Assignee
Microwave Ovens Ltd
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 Microwave Ovens Ltd filed Critical Microwave Ovens Ltd
Publication of EP0243025A2 publication Critical patent/EP0243025A2/de
Publication of EP0243025A3 publication Critical patent/EP0243025A3/de
Withdrawn legal-status Critical Current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
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6482—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating
    • H05B6/6485—Aspects related to microwave heating combined with other heating techniques combined with radiant heating, e.g. infrared heating further combined with convection heating

Definitions

  • This invention relates to microwave ovens of the type having both a magnetron for delivering microwave power to the oven cavity and a system for delivering a forced flow of air through the oven cavity.
  • a microwave oven comprises a food-receiving cavity, a magnetron for delivering microwave power to the cavity, and a forced air system comprising a fan located in a compartment separated from the cavity by a dividing wall, a first aperture in the wall serving as an outlet for air from the cavity and a second aperture in the wall serving as an inlet for air into the cavity, an electrical resistance heating element located at the top of the cavity and being capable of serving not only as a heating element for heating the air forced through the cavity by the fan but also as a radiant grill element when the fan is not operative, there being no electrical resistance heating element for heating the air in the compartment.
  • the dividing wall is preferably at the rear of the cavity, but an alternative arrangement is for the dividing wall to be a side wall of the cavity, the compartment then being located beside the cavity.
  • the outlet aperture may have a horizontal extent greater at its upper end than its lower end, in which case the inlet aperture is preferably constituted by perforations extending over an area which is of inverted L shape.
  • the preferred oven has time controls but no temperature controls, and the top of the oven may be fitted with a hob provided by a ring element and an induction hob.
  • the oven is similar in construction and in circuit configuration to the ovens disclosed in the Applicants' two UK patent Specifications 2l27658A and 2l37860A.
  • the oven has a food-receiving cavity l0 which is closable by a hinged front door l2 and in the base of which is located a rotatable turntable l4.
  • a magnetron (not shown) delivers microwave power to the cavity through an inlet l6, and cooling air from a magnetron blower fan is capable of entering the cavity through a perforated inlet l8.
  • the rear wall 20 of the cavity has a perforated outlet aperture 22 and a perforated inlet aperture 24, these two outlets respectively serving for the exit and entry of forced air through the cavity.
  • the cavity has a further vent 25, and a perforated area 26 which is illuminated .
  • the front of the casing of the oven has a control panel 30.
  • the rear of the oven has a casing 32 shaped to provide a rear compartment 34 through which air passes behind the panel.
  • a fan 36 disposed behind the outlet aperture 22.
  • the fan 36 is rotatable about a horizontal axis and has around its periphery a plurality of impeller blades which draw air from the cavity l0, through the outlet aperture 22, and thence force the air back into the cavity l0 through the inlet aperture 24.
  • the wall 20 thus separates the cavity from the compartment 34.
  • the top of the cavity l0 is provided with a electrical resistance heating element 38.
  • the element 38 is supported from the upper part of the rear wall 20 and projects forwardly therefrom so as to underlie the top panel of the cavity.
  • the element 38 heats the air circulated through the cavity by the fan 36. Also, when the forced flow of air through the cavity is not requir ed, ie when the fan 36 is not operative, the element 38 serves as a radiant grill element.
  • the inlet aperture 24 is defined by perforations which extend over an area generally of rectangular shape.
  • the aperture 24 may have perforations extending over an area of generally inverted L shape, so that the horizontal extent of the inlet aperture 24 is greater at the top of the aperture than at the bottom, the upper end extending partially below the heating element 38. This enlarged width of the inlet aperture 24 at its upper end causes more air to enter the upper part of the cavity l0 where it is heated by the element 38.
  • the compartment instead of being behind the cavity, may be positioned beside the cavity.
  • the dividing wall between the compartment and cavity is then a side wall of the cavity and will have spaced inlet and outlet apertures providing a flow pattern similar to that of the oven described, but transposed through ninety degrees.
EP87302914A 1986-04-23 1987-04-03 Mikrowellenöfen Withdrawn EP0243025A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8609937 1986-04-23
GB868609937A GB8609937D0 (en) 1986-04-23 1986-04-23 Microwave ovens

Publications (2)

Publication Number Publication Date
EP0243025A2 true EP0243025A2 (de) 1987-10-28
EP0243025A3 EP0243025A3 (de) 1988-03-30

Family

ID=10596710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87302914A Withdrawn EP0243025A3 (de) 1986-04-23 1987-04-03 Mikrowellenöfen

Country Status (4)

Country Link
EP (1) EP0243025A3 (de)
JP (1) JPS62255731A (de)
AU (1) AU7186187A (de)
GB (1) GB8609937D0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697321A1 (fr) * 1992-10-26 1994-04-29 Moulinex Sa Four électrique de cuisson domestique par gril ou par convection forcée.
GB2383125A (en) * 2001-12-11 2003-06-18 Ceramaspeed Ltd An oven with microwave and resistance heating means.
CN101344269B (zh) * 2007-07-09 2010-12-01 三星电子株式会社 对流加热单元以及具有该对流加热单元的加热炊具
US11412584B2 (en) 2017-12-08 2022-08-09 Alkar-Rapidpak, Inc. Ovens with metallic belts and microwave launch box assemblies for processing food products

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2301150A1 (fr) * 1975-02-14 1976-09-10 Matsushita Electric Ind Co Ltd Appareil de chauffage a induction alimente par un ondulateur
FR2399780A1 (fr) * 1977-08-01 1979-03-02 Bosch Siemens Hausgeraete Four a micro-ondes comportant une porte du type a tiroir
US4332992A (en) * 1979-12-19 1982-06-01 Amana Refrigeration, Inc. Air flow system for combination microwave and convection oven
US4511779A (en) * 1983-03-07 1985-04-16 Amana Refrigeration, Inc. Microwave oven shelf
DE3404199A1 (de) * 1984-02-07 1985-08-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Backofen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2301150A1 (fr) * 1975-02-14 1976-09-10 Matsushita Electric Ind Co Ltd Appareil de chauffage a induction alimente par un ondulateur
FR2399780A1 (fr) * 1977-08-01 1979-03-02 Bosch Siemens Hausgeraete Four a micro-ondes comportant une porte du type a tiroir
US4332992A (en) * 1979-12-19 1982-06-01 Amana Refrigeration, Inc. Air flow system for combination microwave and convection oven
US4511779A (en) * 1983-03-07 1985-04-16 Amana Refrigeration, Inc. Microwave oven shelf
DE3404199A1 (de) * 1984-02-07 1985-08-08 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Backofen

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697321A1 (fr) * 1992-10-26 1994-04-29 Moulinex Sa Four électrique de cuisson domestique par gril ou par convection forcée.
EP0595083A2 (de) * 1992-10-26 1994-05-04 Moulinex S.A. Haushaltofen
EP0595083A3 (en) * 1992-10-26 1994-06-15 Moulinex Sa Domestic cooking oven
GB2383125A (en) * 2001-12-11 2003-06-18 Ceramaspeed Ltd An oven with microwave and resistance heating means.
GB2383125B (en) * 2001-12-11 2005-07-27 Ceramaspeed Ltd Oven with auxiliary heating means
CN101344269B (zh) * 2007-07-09 2010-12-01 三星电子株式会社 对流加热单元以及具有该对流加热单元的加热炊具
US11412584B2 (en) 2017-12-08 2022-08-09 Alkar-Rapidpak, Inc. Ovens with metallic belts and microwave launch box assemblies for processing food products
US11751296B2 (en) 2017-12-08 2023-09-05 Alkar-Rapidpak, Inc. Ovens with metallic belts and microwave launch box assemblies for processing food products

Also Published As

Publication number Publication date
EP0243025A3 (de) 1988-03-30
GB8609937D0 (en) 1986-05-29
AU7186187A (en) 1987-10-29
JPS62255731A (ja) 1987-11-07

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Inventor name: EKE, KENNETH IAN