EP0482601A1 - Alimentation de micro-ondes dans des fours à micro-ondes - Google Patents

Alimentation de micro-ondes dans des fours à micro-ondes Download PDF

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Publication number
EP0482601A1
EP0482601A1 EP19910118056 EP91118056A EP0482601A1 EP 0482601 A1 EP0482601 A1 EP 0482601A1 EP 19910118056 EP19910118056 EP 19910118056 EP 91118056 A EP91118056 A EP 91118056A EP 0482601 A1 EP0482601 A1 EP 0482601A1
Authority
EP
European Patent Office
Prior art keywords
microwave
household appliance
appliance according
waveguide
reflector trough
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
EP19910118056
Other languages
German (de)
English (en)
Other versions
EP0482601B1 (fr
Inventor
Armin Dipl.-Ing. Zibold
Rudolf Begero
Franz Rothmaier
Walter Gramlich
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 EP0482601A1 publication Critical patent/EP0482601A1/fr
Application granted granted Critical
Publication of EP0482601B1 publication Critical patent/EP0482601B1/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
    • H05B6/74—Mode transformers or mode stirrers

Definitions

  • the patent application relates to a microwave household appliance, in particular to a radiator unit for a microwave oven, with the features specified in the preamble of claim 1.
  • a microwave oven with a rotating antenna has become known, the antenna arm of which is a segment of a circular area with an opening angle that is between 1/3 Pi and Pi.
  • the circular surface segment has projections on the lateral boundaries, the width of which is approximately 1/6 of the wavelength of the microwaves.
  • DE-33 26 514 has proposed a microwave oven with a rotating antenna, the antenna arm of which is asymmetrical. This is intended to solve the problem of improving the uniformity of the microwave radiation and achieving a uniform heating of the food in the cooking space.
  • the invention is therefore based on the object of using a special emitter unit to bring about a further improvement in the energy density distribution in the cooking space and thus to improve the cooking results via more uniform energy distributions.
  • the arrangement according to the invention for solving this problem is characterized in that a reflector trough 7 arranged outside the oven cover surface is connected to the waveguide 4 and the oven cover surface 10, in that the microwave coupling-out pin which projects into the reflector trough and is connected to the field stirrer at a passage point between the waveguide and the reflector trough is surrounded by at least two microwave-specific discontinuities and that the cover delimits the reflector trough on the cooking chamber side.
  • An advantageous embodiment of the invention consists in that the microwave-specific discontinuities ⁇ / 8 are long screw connections, which at the same time mechanically connect the waveguide to the reflector trough.
  • Such discontinuities represent blind elements from a microwave point of view and model the current density coating on the antenna arm, with the same effect on a field stirrer element.
  • the rotary antenna or the field stirrer detects microwave-specific discontinuities as often as possible and thus part of the current density coating on the respective surface of the antenna or the field stirrer is constantly acted on by additional blind elements.
  • the geometric design of the antenna arm configuration or the field stirrer can also cause different current density coatings, which also result in a more even energy distribution in the cooking space.
  • the field stirrer spiral 8 which is set in rotation by the stirrer drive 1, is firmly connected to the microwave decoupling pin 5, within the reflector trough 7
  • Reflector trough 7 is arranged outside the oven top surface and is connected to the waveguide 4 and the oven top surface 10 via screw connections.
  • the overall structural arrangement of waveguide 4 and the system of the field stirrer is thus centered on the waveguide feedthrough opening in the center of the cooking space.
  • the waveguide screw connections 6 represent microwave-specific discontinuities of the length ⁇ / 8 of the microwaves. However, it is also conceivable that the microwave-specific discontinuities are designed as ⁇ / 8 long weld thickenings.
  • the reflector trough 7 will preferably have a circular cross section with a radius of approximately ⁇ / 2 of the microwave wavelength. A rectangular design of the reflector trough 7 is also possible.
  • the waveguide feed-through opening 11 from the waveguide 4 to the reflector trough 7 has at least a diameter of ⁇ / 4 of the microwave wavelength.
  • the reflector trough 7 is provided with a cover 9 which consists of materials which are permeable to microwaves and have low dielectric losses.
  • the material borosilicate glass is preferably used for the cover 9, but plastics with low E r can also be used.
  • the field stirrer is designed as a stirrer spiral 8, the top view of which can be seen in FIG. 2.
  • this embodiment results in a good energy density distribution in the cooking space.
  • Other field stirrers are also conceivable, for example modified circular sectors which can contain current density displacement openings.
  • Rotating pins which are suspended on the microwave coupling-out pin 5 can also be arranged in connection with appropriately arranged reflector troughs and microwave-specific ones Discontinuities force a similar energy density distribution.
  • the field stirrer 8 is designed as a stirrer spiral according to FIG. 1, then the condition applies that its total length is much larger than the thickness.
  • materials that are very corrosion-resistant and have good long-term constancy of electrical properties for example chromium-nickel alloys, are preferably used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
EP91118056A 1990-10-26 1991-10-23 Alimentation de micro-ondes dans des fours à micro-ondes Expired - Lifetime EP0482601B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4034161 1990-10-26
DE4034161A DE4034161A1 (de) 1990-10-26 1990-10-26 Mikrowelleneinspeisung in mikrowellen-backoefen

Publications (2)

Publication Number Publication Date
EP0482601A1 true EP0482601A1 (fr) 1992-04-29
EP0482601B1 EP0482601B1 (fr) 1995-06-14

Family

ID=6417144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118056A Expired - Lifetime EP0482601B1 (fr) 1990-10-26 1991-10-23 Alimentation de micro-ondes dans des fours à micro-ondes

Country Status (3)

Country Link
EP (1) EP0482601B1 (fr)
JP (1) JPH04264387A (fr)
DE (3) DE9017953U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011080204A1 (fr) 2009-12-30 2011-07-07 Arcelik Anonim Sirketi Four
CN104791858A (zh) * 2015-03-23 2015-07-22 广东美的厨房电器制造有限公司 微波炉

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101448348B (zh) * 2008-11-27 2011-06-15 电子科技大学 一种螺旋喇叭状微波馈能天线及其阵列微波加热装置
EP2950616B1 (fr) * 2014-05-26 2018-11-07 Electrolux Appliances Aktiebolag Four à micro-ondes avec un guide d'onde incluant un élément réflecteur
CN105357790B (zh) * 2015-12-21 2018-01-12 电子科技大学 一种采用圆极化螺旋天线作辐射器的双管微波炉
CN105509108B (zh) * 2015-12-21 2018-01-12 电子科技大学 一种采用圆筒形炉腔及以螺旋天线作辐射器的微波炉
CN105392227B (zh) * 2015-12-21 2017-12-15 电子科技大学 一种采用圆极化螺旋天线作为辐射器的微波炉
CN110191530B (zh) * 2019-05-28 2021-10-29 中国电子科技集团公司第十二研究所 一种微波辐射加热装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3493709A (en) * 1968-10-25 1970-02-03 Gen Electric Spiral antenna for electronic oven
US3939320A (en) * 1974-04-12 1976-02-17 Micro-Tronics, Inc. Beam stirrer
US4335289A (en) * 1978-12-21 1982-06-15 Amana Refrigeration, Inc. Microwave oven
GB2161050A (en) * 1982-03-11 1986-01-02 Bosch Siemens Hausgeraete Microwave oven with rotary antenna seal
US4833286A (en) * 1986-03-29 1989-05-23 Sharp Kabushiki Kaisha Microwave stirrer for microwave oven

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5665487A (en) * 1979-10-30 1981-06-03 Matsushita Electric Ind Co Ltd High frequency heating device
US4316069A (en) * 1979-12-03 1982-02-16 General Electric Company Microwave oven excitation system
DE3029035C2 (de) * 1980-07-31 1982-11-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mikrowellenheizgerät
DE3142633A1 (de) * 1981-10-28 1983-05-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Kombinierter herd fuer mikrowellen- und elektrischen heizwiderstands-betrieb
JPS5920992A (ja) * 1982-07-23 1984-02-02 松下電器産業株式会社 高周波加熱装置
GB2127259B (en) * 1982-08-31 1986-01-08 Bosch Siemens Hausgeraete High-frequency heating appliance
JPS60130094A (ja) * 1983-12-15 1985-07-11 松下電器産業株式会社 高周波加熱装置
DE3720719C1 (en) * 1987-06-23 1989-01-12 Bosch Siemens Hausgeraete Microwave oven which has a more evenly distributed energy in the cooking space

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3493709A (en) * 1968-10-25 1970-02-03 Gen Electric Spiral antenna for electronic oven
US3939320A (en) * 1974-04-12 1976-02-17 Micro-Tronics, Inc. Beam stirrer
US4335289A (en) * 1978-12-21 1982-06-15 Amana Refrigeration, Inc. Microwave oven
GB2161050A (en) * 1982-03-11 1986-01-02 Bosch Siemens Hausgeraete Microwave oven with rotary antenna seal
US4833286A (en) * 1986-03-29 1989-05-23 Sharp Kabushiki Kaisha Microwave stirrer for microwave oven

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, unexamined applications, M Section, Band 3, Nr. 122, 13. Oktober 1979 THE PATENT OFFICE JAPANESE GOVERNMENT Seite 72 M 76 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011080204A1 (fr) 2009-12-30 2011-07-07 Arcelik Anonim Sirketi Four
CN102687588A (zh) * 2009-12-30 2012-09-19 阿塞里克股份有限公司 烤炉
CN102687588B (zh) * 2009-12-30 2015-04-22 阿塞里克股份有限公司 烤炉
CN104791858A (zh) * 2015-03-23 2015-07-22 广东美的厨房电器制造有限公司 微波炉

Also Published As

Publication number Publication date
DE4034161A1 (de) 1992-04-30
JPH04264387A (ja) 1992-09-21
DE59105703D1 (de) 1995-07-20
EP0482601B1 (fr) 1995-06-14
DE9017953U1 (de) 1993-01-28

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