EP0344438B1 - Mikrowellen-Haushaltgerät - Google Patents

Mikrowellen-Haushaltgerät Download PDF

Info

Publication number
EP0344438B1
EP0344438B1 EP89106832A EP89106832A EP0344438B1 EP 0344438 B1 EP0344438 B1 EP 0344438B1 EP 89106832 A EP89106832 A EP 89106832A EP 89106832 A EP89106832 A EP 89106832A EP 0344438 B1 EP0344438 B1 EP 0344438B1
Authority
EP
European Patent Office
Prior art keywords
waveguide
cooking space
excitation
microwave
appliance according
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
EP89106832A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0344438A1 (de
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.)
BSH Hausgeraete GmbH
Original Assignee
Bosch Siemens Hausgerate GmbH
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 Bosch Siemens Hausgerate GmbH filed Critical Bosch Siemens Hausgerate GmbH
Publication of EP0344438A1 publication Critical patent/EP0344438A1/de
Application granted granted Critical
Publication of EP0344438B1 publication Critical patent/EP0344438B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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, permanently impressed 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 and to reduce the constructive wall compared to wobbler and rotating antenna applications 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 the cooking space design.
  • 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 swept 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 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 Mikrowellen-Haushaltgerät Expired - Lifetime EP0344438B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=6355512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89106832A Expired - Lifetime EP0344438B1 (de) 1988-05-31 1989-04-17 Mikrowellen-Haushaltgerät

Country Status (3)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE501494C2 (sv) * 1993-07-02 1995-02-27 Whirlpool Europ Förfarande för mikrovågsinmatning vid en mikrovågsvärmningsanordning samt mikrovågsvärmningsanordning
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
JP2000515348A (ja) * 1996-07-24 2000-11-14 アー エフ テー アドヴァンスド フェライト テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツング マイクロ波装置の調整整合装置
KR19980063369A (ko) * 1996-12-12 1998-10-07 윤종용 전자렌지
DE19654356C2 (de) * 1996-12-24 2002-06-13 Ind Ofenbau Rudolf Brands Gmbh Ofen zur Hochtemperatur-Wärmebehandlung
KR100565656B1 (ko) * 2004-02-19 2006-03-29 엘지전자 주식회사 전자레인지

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB752206A (en) * 1953-11-12 1956-07-04 Raytheon Mfg Co Improvements in or relating to high frequency dielectric heating apparatus
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
US4105886A (en) * 1976-07-06 1978-08-08 Litton Systems, Inc. Microwave energy feed system for combination cooking apparatus
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 (enrdf_load_stackoverflow) * 1978-10-25 1980-05-01
DE2946766A1 (de) * 1979-11-20 1981-06-11 Licentia Gmbh Kombinierter herd fuer mikrowellen- und konventionellen widerstands-heizbetrieb
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
DE3135290A1 (de) * 1981-09-05 1983-03-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektrischer ofen
DE3140150A1 (de) * 1981-10-09 1983-04-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kombinierter herd fuer mikrowellen- und elektrischen heizwiderstands-betrieb
JPS5885125A (ja) * 1981-11-16 1983-05-21 Toshiba Corp 電子レンジ
DE3703133A1 (de) * 1987-02-03 1988-08-11 Buderus Kuechentechnik Verfahren und vorrichtung zur vergleichmaessigung der erwaermung von speisen in einem mit mikrowellenenergie beheizten gargeraet
DE3723628A1 (de) * 1987-07-17 1989-01-26 Licentia Gmbh Mikrowellenofen

Also Published As

Publication number Publication date
ES2047054T3 (es) 1994-02-16
EP0344438A1 (de) 1989-12-06
DE58906337D1 (de) 1994-01-20
DE3818490C2 (enrdf_load_stackoverflow) 1991-05-29
DE3818490A1 (de) 1989-12-07

Similar Documents

Publication Publication Date Title
DE2622173C3 (de) Vorrichtung zum Erhitzen eines in eine Heizkammer eingebrachten Gegenstandes
DE10106164B4 (de) Mikrowellenherd
DE2504860C3 (enrdf_load_stackoverflow)
DE69106825T2 (de) Mikrowellenofen, eine Methode zur Anregung einer Ofenkavität, und eine Wellenleiteranordnung zur Ausführung der Methode.
DE2650681C3 (de) Mikrowellenofen
DE2516622C3 (de) Mikrowellenofen
DE69703801T2 (de) Elektrischer kochherd
DE68921050T2 (de) Mikrowellenheizgerät.
DE3310703A1 (de) Mikrowellenkochgeraet
DE602004004642T2 (de) Mikrowellen- oder radiofrequenz-vorrichtung enthaltend drei entkoppelten generatoren
DE2162196B2 (de) Wellentypwandler
DE3215087A1 (de) Fensteranordnung fuer einen mikrowellenleiter
DE69905669T2 (de) Mittels einer resonanten offset-stegblende gespeister zentrierter longitudinaler shuntschlitz
EP0344438B1 (de) Mikrowellen-Haushaltgerät
DE2363045A1 (de) Mikrowellenherd mit wellentyperreger
DE3325080A1 (de) Rillenhornstrahler
DE3331432C2 (enrdf_load_stackoverflow)
DE3029035C2 (de) Mikrowellenheizgerät
DE3844761C2 (enrdf_load_stackoverflow)
EP0610588B1 (de) Backofenmuffel mit schwenkbar angeordnetem Heizkörper
DE69109530T2 (de) Hohlleiterantenne mit mehreren Breitseiteschlitzen und einem Raumfilter.
DE69013247T2 (de) Direkt strahlender Verteiler von Höchstfrequenzenergie.
EP0284958B1 (de) Vorrichtung zum Einkoppeln eines Mikrowellenfeldes an einem Mikrowellenherd
DE2257859C2 (de) Mikrowellenofen
DE3022235C2 (de) Mikrowellenheizgerät

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES GB IT LI SE

17P Request for examination filed

Effective date: 19891227

17Q First examination report despatched

Effective date: 19930127

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BOSCH-SIEMENS HAUSGERAETE GMBH

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES GB IT LI SE

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19931216

REF Corresponds to:

Ref document number: 58906337

Country of ref document: DE

Date of ref document: 19940120

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2047054

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 89106832.2

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19980424

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980608

Year of fee payment: 10

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: ISLER & PEDRAZZINI AG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990419

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990430

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20000310

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010418

EUG Se: european patent has lapsed

Ref document number: 89106832.2

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020204

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020403

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030417

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030505

Year of fee payment: 15

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030417

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050417