US3436507A - Device for heating nonmetallic materials,more particularly food-stuffs,by microwave energy in a cavity resonator - Google Patents

Device for heating nonmetallic materials,more particularly food-stuffs,by microwave energy in a cavity resonator Download PDF

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Publication number
US3436507A
US3436507A US556734A US3436507DA US3436507A US 3436507 A US3436507 A US 3436507A US 556734 A US556734 A US 556734A US 3436507D A US3436507D A US 3436507DA US 3436507 A US3436507 A US 3436507A
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United States
Prior art keywords
heating
cavity resonator
microwave energy
stuffs
nonmetallic materials
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Expired - Lifetime
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US556734A
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English (en)
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Herbert August Puschner
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    • 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

  • a microwave oven is fed from the top through an input coupling system connecting the heating chamber with the microwave generator.
  • a sealed stirrer is in the heating chamber supported for rotation coaxially to the input coupling system and has a primary radiator and an array of secondary radiators so that rotation of the stirrer keeps the field in the oven essentially uniform.
  • the invention relates to a device for heating nonmetallic materials, more particularly foodstufis, by microwave energy in a cavity resonator.
  • the cavity resonator serves as the heating chamber and a coupling system is provided which connects the heating chamber with the microwave generator, an oscillation-type converter being provided which rotates in the heating chamber.
  • the converter has been provided apart from the coupling system, on the assumption that by this an especially uniform field distribution and uniform heating of the material would be achieved.
  • Practice has shown however that with such an arrangement, undesirably high field strength differences occur in the heating chamber which cause nonuniform heating and necessitate correspondingly longer heating times in order to bring the entire material to the desired final temperature.
  • the present invention is based on the consideration that an arrangement of the converter apart from the coupling system results in an operative mechanism which is difiicult to supervise and is independent of the otherwise usual geometric relationships.
  • the converter is arranged to rotate coaxially to the input coupling system.
  • a particularly advantageous utilisation of the coaxial arrangement of the input coupling system and oscillationtype converter is achieved if the wave coming from the coaxial input is coupled to the oscillation-type converter through a coaxial conical transition.
  • the oscillation-type converter can consist of a number of secondary radiators and the polarisation of the secondary radiators can be distributed over all three space coordinates of the cavity resonator. I 1
  • FIG. 1 illustrates a cavity resonator with an input coupling system and an oscillation-type converter
  • FIG. 2 is a plan view of FIG. 1.
  • the illustrated device comprises a heating chamber 1 in which foodstuff to be heated can be placed.
  • the heating chamber has a door 2 at its front side.
  • the heating chamber 1 is formed as a cavity resonator for the microwave energy which is used, and for this purpose is provided with a wall 2 which consists of metal or which is provided with a metallic cladding.
  • a coaxial line with an outer conductor 4 and an inner conductor 5 is provided in the centre of the top.
  • a conical transition 6 of metal is connected to the inner conductor 5, its base surface carrying a circular plate 7 with a plurality of secondary radiators '8 which are in the form of narrow metal strips.
  • the plate 7 which consists of nonmetallic material, with the metal transition cone 6 connected to the inner conductor 5, serves as an oscillation-type converter and is arranged for rotation.
  • a device for heating nonmetallic materials, such as foodstuffs, by microwave energy comprising a cavity resonator serving as a heating chamber, a microwave generator, an input coupling system connecting the heating chamber with the microwave generator, and field stirring means rotatably disposed in the heating chamber, means for supporting said field stirring means for rotation coaxially to the said input coupling system, said field stirring means including a primary radiator and an array of secondary radiators.
  • said primary radiator includes a conical transition member disposed coaxially to the input coupling system and arranged for coupling a wave from the input coupling system to said primary and secondary radiators.
  • a device wherein the secondary radiators are carried by a nonmetallic and circular plate carried by said conical transmission memher.
  • a device wherein the polarisation of the secondary radiators is distributed over all three space coordinates of the cavity resonator.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
US556734A 1965-06-12 1966-06-10 Device for heating nonmetallic materials,more particularly food-stuffs,by microwave energy in a cavity resonator Expired - Lifetime US3436507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA0049462 1965-06-12

Publications (1)

Publication Number Publication Date
US3436507A true US3436507A (en) 1969-04-01

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ID=6936886

Family Applications (1)

Application Number Title Priority Date Filing Date
US556734A Expired - Lifetime US3436507A (en) 1965-06-12 1966-06-10 Device for heating nonmetallic materials,more particularly food-stuffs,by microwave energy in a cavity resonator

Country Status (7)

Country Link
US (1) US3436507A (ko)
AT (1) AT270021B (ko)
CH (1) CH455975A (ko)
DE (1) DE1565261C3 (ko)
GB (1) GB1128387A (ko)
NL (2) NL6607728A (ko)
SE (1) SE324625B (ko)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643055A (en) * 1969-12-01 1972-02-15 Matsushita Electric Ind Co Ltd High-frequency heating apparatus
DE2622173A1 (de) * 1975-05-19 1976-12-02 Matsushita Electric Ind Co Ltd Vorrichtung zur beheizung eines gegenstandes mittels hochfrequenter strahlung, insbesondere mikrowellen- ofen
DE2844128A1 (de) 1977-10-14 1979-04-19 Bosch Siemens Hausgeraete Mikrowellenofen
US4176266A (en) * 1976-02-02 1979-11-27 Hitachi, Ltd. Microwave heating apparatus
US4185182A (en) * 1978-07-03 1980-01-22 Armstrong Cork Company Microwave oven apparatus
FR2443025A1 (fr) * 1978-12-01 1980-06-27 Raytheon Co Four a hyperfrequences a elements rayonnants tournants
US4284868A (en) * 1978-12-21 1981-08-18 Amana Refrigeration, Inc. Microwave oven
US4335289A (en) * 1978-12-21 1982-06-15 Amana Refrigeration, Inc. Microwave oven
DE2857841C1 (de) * 1977-10-14 1982-07-15 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Mikrowellenofen
US4358653A (en) * 1977-11-25 1982-11-09 Raytheon Company Combination microwave oven
US4410779A (en) * 1978-04-03 1983-10-18 Raytheon Company Combination microwave oven control system
US4414453A (en) * 1978-12-21 1983-11-08 Raytheon Company Microwave oven feed apparatus
US4421968A (en) * 1978-12-01 1983-12-20 Raytheon Company Microwave oven having rotating conductive radiators
US4430538A (en) 1980-08-28 1984-02-07 Tokyo Shibaura Denki Kabushiki Kaisha High-frequency heating device
US4431888A (en) * 1978-12-21 1984-02-14 Amana Refrigeration, Inc. Microwave oven with improved feed structure
US4463239A (en) * 1982-12-06 1984-07-31 General Electric Company Rotating slot antenna arrangement for microwave oven
US4629849A (en) * 1984-06-28 1986-12-16 Ngk Insulators Ltd. Microwave heating device having a rotary reflector means in a heating chamber
US5438183A (en) * 1993-06-30 1995-08-01 Sanyo Electric Co., Ltd. Microwave oven including antenna for radiating microwave

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1125378A (en) * 1978-04-03 1982-06-08 Bernard J. Weiss Combination microwave oven control system
SE416696B (sv) * 1979-03-19 1981-01-26 Philips Svenska Ab Anordning vid mikrovagsugnar for inmatning av energi
KR890001581Y1 (ko) * 1986-07-21 1989-04-06 삼성전자주식회사 전자렌지의 고주파분산팬 보조날개 취부장치

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748239A (en) * 1952-09-05 1956-05-29 Gen Motors Corp Domestic appliance
US2961520A (en) * 1957-04-02 1960-11-22 Gen Motors Corp Domestic appliance
FR1482777A (fr) * 1965-06-12 1967-05-26 Atlas Werke Gmbh Appareil pour chauffer des matières non métalliques, en particulier des denrées alimentaires, au moyen d'énergie de micro-ondes
US3364332A (en) * 1964-03-20 1968-01-16 Philips Corp Arrangement in microwave stoves

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748239A (en) * 1952-09-05 1956-05-29 Gen Motors Corp Domestic appliance
US2961520A (en) * 1957-04-02 1960-11-22 Gen Motors Corp Domestic appliance
US3364332A (en) * 1964-03-20 1968-01-16 Philips Corp Arrangement in microwave stoves
FR1482777A (fr) * 1965-06-12 1967-05-26 Atlas Werke Gmbh Appareil pour chauffer des matières non métalliques, en particulier des denrées alimentaires, au moyen d'énergie de micro-ondes

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643055A (en) * 1969-12-01 1972-02-15 Matsushita Electric Ind Co Ltd High-frequency heating apparatus
DE2622173A1 (de) * 1975-05-19 1976-12-02 Matsushita Electric Ind Co Ltd Vorrichtung zur beheizung eines gegenstandes mittels hochfrequenter strahlung, insbesondere mikrowellen- ofen
US4476362A (en) * 1975-05-19 1984-10-09 Matsushita Electric Industrial Co., Ltd. High frequency heating apparatus
US4176266A (en) * 1976-02-02 1979-11-27 Hitachi, Ltd. Microwave heating apparatus
DE2844128A1 (de) 1977-10-14 1979-04-19 Bosch Siemens Hausgeraete Mikrowellenofen
DE2857841C1 (de) * 1977-10-14 1982-07-15 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Mikrowellenofen
US4358653A (en) * 1977-11-25 1982-11-09 Raytheon Company Combination microwave oven
US4410779A (en) * 1978-04-03 1983-10-18 Raytheon Company Combination microwave oven control system
US4185182A (en) * 1978-07-03 1980-01-22 Armstrong Cork Company Microwave oven apparatus
FR2443025A1 (fr) * 1978-12-01 1980-06-27 Raytheon Co Four a hyperfrequences a elements rayonnants tournants
US4421968A (en) * 1978-12-01 1983-12-20 Raytheon Company Microwave oven having rotating conductive radiators
US4335289A (en) * 1978-12-21 1982-06-15 Amana Refrigeration, Inc. Microwave oven
US4414453A (en) * 1978-12-21 1983-11-08 Raytheon Company Microwave oven feed apparatus
US4431888A (en) * 1978-12-21 1984-02-14 Amana Refrigeration, Inc. Microwave oven with improved feed structure
US4284868A (en) * 1978-12-21 1981-08-18 Amana Refrigeration, Inc. Microwave oven
US4430538A (en) 1980-08-28 1984-02-07 Tokyo Shibaura Denki Kabushiki Kaisha High-frequency heating device
US4463239A (en) * 1982-12-06 1984-07-31 General Electric Company Rotating slot antenna arrangement for microwave oven
US4629849A (en) * 1984-06-28 1986-12-16 Ngk Insulators Ltd. Microwave heating device having a rotary reflector means in a heating chamber
US5438183A (en) * 1993-06-30 1995-08-01 Sanyo Electric Co., Ltd. Microwave oven including antenna for radiating microwave
AU666616B2 (en) * 1993-06-30 1996-02-15 Sanyo Electric Co., Ltd. Microwave oven including antenna for radiating microwave

Also Published As

Publication number Publication date
CH455975A (de) 1968-05-15
SE324625B (ko) 1970-06-08
NL136572C (ko)
DE1565261C3 (de) 1974-01-24
DE1565261A1 (de) 1970-02-05
AT270021B (de) 1969-04-10
GB1128387A (en) 1968-09-25
DE1565261B2 (de) 1973-06-28
NL6607728A (ko) 1966-12-13

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