EP0344438A1 - Appareil domestique à micro-ondes - Google Patents

Appareil domestique à micro-ondes Download PDF

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Publication number
EP0344438A1
EP0344438A1 EP19890106832 EP89106832A EP0344438A1 EP 0344438 A1 EP0344438 A1 EP 0344438A1 EP 19890106832 EP19890106832 EP 19890106832 EP 89106832 A EP89106832 A EP 89106832A EP 0344438 A1 EP0344438 A1 EP 0344438A1
Authority
EP
European Patent Office
Prior art keywords
waveguide
microwave
cooking space
household appliance
coupling
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.)
Granted
Application number
EP19890106832
Other languages
German (de)
English (en)
Other versions
EP0344438B1 (fr
Inventor
Wolfgang Dipl.-Ing. Beifuss
Julius Dipl.-Ing. Husslein
Martin Dipl.-Ing. Schulte
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 EP0344438A1 publication Critical patent/EP0344438A1/fr
Application granted granted Critical
Publication of EP0344438B1 publication Critical patent/EP0344438B1/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
    • H05B6/72—Radiators or antennas
    • H05B6/725—Rotatable antennas
    • 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
    • H05B6/6402—Aspects relating to the microwave cavity
    • 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
    • H05B6/74—Mode transformers or mode stirrers

Definitions

  • the invention relates to a microwave household appliance according to the preamble of claim 1.
  • the coupling of the microwave power without rotating parts results in load-dependent, firmly imprinted structures of energy maxima and energy minima in the cooking space of a microwave oven.
  • the resulting poor energy density distribution in the cooking space was tried to be remedied on the one hand by wobblers and rotating antennas, and on the other hand field stirrers were arranged in the waveguide.
  • the object of the invention is therefore to improve the power consumption and energy density distribution of the cooking space by means of at least one rotatably mounted field stirrer arranged in the waveguide in combination with the coupling geometry between the waveguide and the cooking space and to reduce the constructive wall compared to wobbler and rotating antenna applications.
  • the position of the rotatably mounted field stirrer in the waveguide is combined with the position and size of the coupling opening in the waveguide and in the cooking space ceiling and in combination with the design of the cooking space.
  • the optimized coupling geometry combined with a cooking chamber optimized for microwave use significantly improves the maximum coupling microwave energy and the degree of homogenization of the microwave energy to the cooking chamber.
  • a magnetron 1 feeds a waveguide 2 in which there is a field stirrer 3 which is rotatably fastened to the waveguide ceiling.
  • the field stirrer 3 is arranged in the vicinity of a coupling opening 4 to a cooking chamber 5.
  • the coupling opening 4 is located in the middle of the cooking chamber and is partially covered by the field stirrer.
  • the coupling opening 4 is sealed by a microwave-permeable cover 7.
  • This cover 7 is designed to be removable for the purpose of cleaning and any replacement that may be necessary and is made, for example, of borosilicate glass.
  • the cooking chamber 5 is constructed symmetrically with regard to its oven-specific construction elements and has the minimum dimensions for cooking chamber height ⁇ 2 ⁇ , cooking chamber width and depth ⁇ 3 ⁇ of the wavelength of the microwaves.
  • a high, evenly distributed energy density prevails in the cooking chamber while avoiding partially high energy densities, which occur in a limited area on the food as direct images of the energy density of the coupling media and are undesirable for the cooking process.
  • FIG. 1b shows a schematic arrangement of two coupling openings 4.1 and 4.2 led from a waveguide 2 into the cooking chamber 5, the field stirrer 3 being arranged in front of the coupling openings 4.1 and 4.2.
  • 1c shows a schematic arrangement of two coupling openings 4.1 and 4.2 led into the cooking space 5, the field stirrer 3 being arranged between the coupling openings 4.1 and 4.2.
  • the design of a waveguide 2, the coupling opening 4 of which is arranged at the waveguide end, is shown.
  • the waveguide 3.1 is rotatably mounted on a waveguide side wall, the cooking chamber 5 has the minimum dimensions already specified.
  • the position of the field stirrer 3.1 with respect to the coupling opening 4.3 lies in the spatial center of the waveguide end piece located above the coupling opening.
  • the metal arm of the field stirrer is mounted in a Teflon pin 6, which in turn is rotatably arranged in the waveguide side wall.
  • the combination waveguide, coupling opening, cooking space is shown to scale.
  • the waveguide 2 fulfills the conditions mentioned in claim 1;
  • the coupling opening 4.3 is at least ⁇ / 2 of the wavelength of the microwaves long and wide,
  • the coupling opening 4.3 is located at the end of the waveguide and is arranged in the center of the cooking space ceiling, - In the vicinity of the coupling opening 4.3 there is a field stirrer 3 (not shown).
  • the cooking space 5 with the minimum dimensions of 2 ⁇ for the cooking space height and 3 ⁇ for the cooking space width u. -deposed.
  • the advantages of this combinatorial arrangement are the improved efficiency and a good equalization of the energy density in relation to a wide range of food, i.e. different cooking space loads.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Waveguide Aerials (AREA)
EP89106832A 1988-05-31 1989-04-17 Appareil domestique à micro-ondes Expired - Lifetime EP0344438B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818490A DE3818490A1 (de) 1988-05-31 1988-05-31 Mikrowellen-haushaltgeraet
DE3818490 1988-05-31

Publications (2)

Publication Number Publication Date
EP0344438A1 true EP0344438A1 (fr) 1989-12-06
EP0344438B1 EP0344438B1 (fr) 1993-12-08

Family

ID=6355512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106832A Expired - Lifetime EP0344438B1 (fr) 1988-05-31 1989-04-17 Appareil domestique à micro-ondes

Country Status (3)

Country Link
EP (1) EP0344438B1 (fr)
DE (2) DE3818490A1 (fr)
ES (1) ES2047054T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632678A1 (fr) * 1993-07-02 1995-01-04 Whirlpool Europe B.V. Dispositif pour chauffage par micro-ondes
WO1998005086A1 (fr) * 1996-07-24 1998-02-05 Aft Advanced Ferrite Technology Gmbh Dispositif pour accorder un systeme a hyperfrequence
EP0848578A2 (fr) * 1996-12-12 1998-06-17 Samsung Electronics Co., Ltd. Four à micro-ondes
EP0851712A2 (fr) * 1996-12-24 1998-07-01 Industrie-Ofenbau Rudolf Brands GmbH Four pour le traitement à haute température
US6982401B2 (en) * 2004-02-19 2006-01-03 Lg Electronics Inc. Microwave oven

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19515342A1 (de) * 1995-04-26 1996-10-31 Widia Gmbh Verfahren, Vorrichtung zur thermischen Behandlung von Stoffen in einem Mikrowellenofen und Verwendung dieses Verfahrens und dieser Vorrichtung

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1112162A (fr) * 1953-11-12 1956-03-09 Raytheon Mfg Co Appareil de chauffage électrique
FR2357822A1 (fr) * 1976-07-06 1978-02-03 Litton Industries Inc Appareillage propagateur d'ondes a hyperfrequences dans un four mixte de cuisiniere
US4301347A (en) * 1980-08-14 1981-11-17 General Electric Company Feed system for microwave oven
DE3028009A1 (de) * 1980-07-24 1982-02-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mikrowellenheizgeraet
FR2489647A1 (fr) * 1980-08-28 1982-03-05 Applic Micro Ondes Ste Fse Dispositif de couplage electromagnetique entre un generateur de micro-ondes et une cavite, notamment une cavite a usage de four
US4336434A (en) * 1980-08-15 1982-06-22 General Electric Company Microwave oven cavity excitation system employing circularly polarized beam steering for uniformity of energy distribution and improved impedance matching
DE3140150A1 (de) * 1981-10-09 1983-04-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kombinierter herd fuer mikrowellen- und elektrischen heizwiderstands-betrieb
DE3120900A1 (de) * 1981-05-26 1983-06-16 Karl Dr. 7800 Freiburg Fritz Mikrowellen-arbeitsraum
EP0277342A2 (fr) * 1987-02-03 1988-08-10 Electrolux-Juno Küchentechnik GmbH Procédé et dispositif pour homogénéiser l'échauffement d'aliments dans un appareil de cuisson chauffant à micro-ondes

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH389802A (de) * 1961-12-01 1965-03-31 Patelhold Patentverwertung Vorrichtung zum dielektrischen Erwärmen von Stoffen
US3993886A (en) * 1974-08-30 1976-11-23 U.S. Philips Corporation Supply wave guide system in microwave ovens
US3949184A (en) * 1975-05-02 1976-04-06 Raytheon Company Folding microwave searing and browning means
US4188520A (en) * 1978-05-31 1980-02-12 General Electric Company Effective concurrent microwave heating and electrical resistance heating in a countertop microwave oven
JPS5564005U (fr) * 1978-10-25 1980-05-01
DE2946766A1 (de) * 1979-11-20 1981-06-11 Licentia Gmbh Kombinierter herd fuer mikrowellen- und konventionellen widerstands-heizbetrieb
DE3135290A1 (de) * 1981-09-05 1983-03-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektrischer ofen
JPS5885125A (ja) * 1981-11-16 1983-05-21 Toshiba Corp 電子レンジ
DE3723628A1 (de) * 1987-07-17 1989-01-26 Licentia Gmbh Mikrowellenofen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1112162A (fr) * 1953-11-12 1956-03-09 Raytheon Mfg Co Appareil de chauffage électrique
FR2357822A1 (fr) * 1976-07-06 1978-02-03 Litton Industries Inc Appareillage propagateur d'ondes a hyperfrequences dans un four mixte de cuisiniere
DE3028009A1 (de) * 1980-07-24 1982-02-18 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mikrowellenheizgeraet
US4301347A (en) * 1980-08-14 1981-11-17 General Electric Company Feed system for microwave oven
US4336434A (en) * 1980-08-15 1982-06-22 General Electric Company Microwave oven cavity excitation system employing circularly polarized beam steering for uniformity of energy distribution and improved impedance matching
FR2489647A1 (fr) * 1980-08-28 1982-03-05 Applic Micro Ondes Ste Fse Dispositif de couplage electromagnetique entre un generateur de micro-ondes et une cavite, notamment une cavite a usage de four
DE3120900A1 (de) * 1981-05-26 1983-06-16 Karl Dr. 7800 Freiburg Fritz Mikrowellen-arbeitsraum
DE3140150A1 (de) * 1981-10-09 1983-04-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kombinierter herd fuer mikrowellen- und elektrischen heizwiderstands-betrieb
EP0277342A2 (fr) * 1987-02-03 1988-08-10 Electrolux-Juno Küchentechnik GmbH Procédé et dispositif pour homogénéiser l'échauffement d'aliments dans un appareil de cuisson chauffant à micro-ondes

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0632678A1 (fr) * 1993-07-02 1995-01-04 Whirlpool Europe B.V. Dispositif pour chauffage par micro-ondes
WO1998005086A1 (fr) * 1996-07-24 1998-02-05 Aft Advanced Ferrite Technology Gmbh Dispositif pour accorder un systeme a hyperfrequence
EP0848578A2 (fr) * 1996-12-12 1998-06-17 Samsung Electronics Co., Ltd. Four à micro-ondes
EP0848578A3 (fr) * 1996-12-12 1998-08-19 Samsung Electronics Co., Ltd. Four à micro-ondes
EP0851712A2 (fr) * 1996-12-24 1998-07-01 Industrie-Ofenbau Rudolf Brands GmbH Four pour le traitement à haute température
EP0851712A3 (fr) * 1996-12-24 1998-09-16 Industrie-Ofenbau Rudolf Brands GmbH Four pour le traitement à haute température
US6982401B2 (en) * 2004-02-19 2006-01-03 Lg Electronics Inc. Microwave oven

Also Published As

Publication number Publication date
DE3818490C2 (fr) 1991-05-29
DE3818490A1 (de) 1989-12-07
DE58906337D1 (de) 1994-01-20
EP0344438B1 (fr) 1993-12-08
ES2047054T3 (es) 1994-02-16

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