EP0346194B1 - Four à micro-ondes équipé d'un répartiteur d'ondes - Google Patents

Four à micro-ondes équipé d'un répartiteur d'ondes Download PDF

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Publication number
EP0346194B1
EP0346194B1 EP89401526A EP89401526A EP0346194B1 EP 0346194 B1 EP0346194 B1 EP 0346194B1 EP 89401526 A EP89401526 A EP 89401526A EP 89401526 A EP89401526 A EP 89401526A EP 0346194 B1 EP0346194 B1 EP 0346194B1
Authority
EP
European Patent Office
Prior art keywords
wave
waveguide
opening
microwave oven
oven 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
EP89401526A
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German (de)
English (en)
French (fr)
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EP0346194A1 (fr
Inventor
Michel Boulard
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0346194A1 publication Critical patent/EP0346194A1/fr
Application granted granted Critical
Publication of EP0346194B1 publication Critical patent/EP0346194B1/fr
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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

Definitions

  • the present invention relates to a microwave oven equipped with a wave distributor.
  • the microwave oven generally comprises an enclosure in which a container is disposed, one or more microwave sources arranged above the container and an antenna-shaped wave distributor mounted to rotate between the microwave source and the inside of the container.
  • This type of distributor has the advantage of distributing the waves evenly over the surface of the product contained in the container.
  • the waves only enter the product to be heated over a limited thickness so that in the case of a large container containing a large quantity of products to be heated, part of the product is not reached by the waves.
  • An object of the invention is to provide a microwave oven equipped with a wave distributor making it possible to homogenize the temperature inside the container while minimizing the stirring to which the product is subjected.
  • a microwave oven comprising a enclosure in which a container is placed, at least one microwave source disposed above the container, characterized in that it comprises at least one tubular waveguide mounted to rotate between the microwave source and the inside the container, this waveguide extending substantially vertically inside the container and comprising at least one wave receiving opening in the vicinity of its upper part and at least one wave diffusion opening opening out at inside the container, the oven preferably comprising means for immobilizing the container against rotation about a vertical axis.
  • part of the waves which would be stopped in the upper layer of the product contained in the container enters the mass of product through the waveguide tubes and exits through the wave diffusion openings to heat the interior of the mass. of product contained in the container, the rotation of the wave distributor ensuring a homogeneous distribution of the waves thus distributed within the material, even for a slow rotation of the wave distributor.
  • the tubular waveguide comprises at least one lateral diffusion opening; at least one wave deflector is arranged in the vicinity of the lateral diffusion orifice, and preferably a first wave deflector facing a wall of the wave guide opposite to the lateral opening is disposed upstream of the lateral opening in a direction of propagation of the microwaves, and a second wave deflector facing the lateral opening of the waveguide is arranged downstream of the lateral opening in the direction of propagation of the microwaves.
  • the wave distributor includes at least two wave guides having lateral diffusion openings at different levels. So we get a homogenization faster temperature within the material.
  • the wave reception and wave diffusion openings are closed by a material permeable to microwaves.
  • the obstruction of the waveguide by the product contained in the container is avoided while ensuring the desired diffusion of the waves.
  • the microwave oven conventionally comprises an enclosure 1 in which is placed a container 2 above which are arranged two microwave generators 3 separated from the container by a protective screen permeable to waves 4.
  • a wave distributor generally designated at 5, has a drive shaft 6 fixed by a coupling 7 to a rotary drive motor 8.
  • the oven also includes a control device with which control buttons are associated 9.
  • the wave distributor comprises an upper cross member 10 fixed to the drive shaft 6 and a lower cross member 11 connected to the upper cross member 10 by two tubular wave guides 12, 13.
  • the tubular waveguides open into a wave receiving opening on the upper face of the cross member 10.
  • the upper end of the wave guides 12, 13 has a funnel shape 14 and the corresponding wave receiving opening is covered with 'a material permeable to waves, for example a glass plate 15.
  • the waveguide 12 has a lateral diffusion opening 16 and, about half of its height, the waveguide 13 has a lateral diffusion opening 17.
  • Each of the diffusion openings 16, 17 is closed by a material permeable to microwaves, for example a curved glass plate 18.
  • the waveguide 13 Upstream of the lateral diffusion opening in a direction of propagation of the microwaves, the waveguide 13 comprises a first deflector 19 facing the wall of the waveguide opposite the lateral opening and, downstream of the lateral opening in the direction of propagation of the microwaves , guide wave 13 includes a second wave deflector 20 facing the lateral opening of the wave guide.
  • the waveguides open onto the lower face of the cross-member 11 according to a second diffusion opening closed by a glass plate 21.
  • the cross-member 10 On its upper face, the cross-member 10 is equipped with adjustment flaps 22 mounted to slide in slides 23.
  • the adjustment flaps 22 are made of microwave-tight material and are used to adjust the quantity of microwaves that are wishes to penetrate the waveguides.
  • the crosspieces 10 and 11 support at their ends scrapers 24 which come to bear on the internal wall of the container 2 during the rotation of the wave distributor 5.
  • the container When the wave distributor is rotated in thick material, the container may be rotated about a vertical axis. To avoid such rotation, there are stops in enclosure 1 25 fixed to the side walls of the enclosure and on which the handles 26 of the container come to rest. If the container used does not have handles, it is of course possible to provide other means for immobilizing the container 2 against rotation about a vertical axis.
  • the wave distributor according to the invention is inserted into the container containing the product to be heated, then the container is introduced into the enclosure 1 and the drive shaft 6 of the wave distributor 5 is coupled to the motor 8.
  • the microwave generators 3 are started up, part of the waves directly penetrates the upper layer of the product contained in the container 2 while another part of the waves enters the waveguides 12 and 13 in a proportion which depends on the opening of the adjustment flaps 22.
  • the product to be heated does not reach the level of the lateral diffusion opening 17 of the waveguide 13, provision may be made to close the associated adjustment flap.
  • the wave diffusion openings can also have different orientations so that the beams of scattered waves cover the entire internal volume of the container during the rotation of the wave distributor.
  • microwave oven comprising generators arranged laterally, the microwave sources towards the interior of the container being then constituted by fixed or movable deflectors disposed above it.
  • a tubular waveguide coaxial with the drive axis 6 or completely replacing it and opening into the upper part of the oven opposite a wave generator specially assigned to this waveguide , if necessary with a conical deflector placed opposite the upper end of the waveguide.
  • a waveguide coaxial with the drive shaft 6 can also be associated with tubular sleepers 10 equipped with deflectors distributing the waves in lateral waveguides.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
EP89401526A 1988-06-07 1989-06-02 Four à micro-ondes équipé d'un répartiteur d'ondes Expired - Lifetime EP0346194B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8807554 1988-06-07
FR8807554A FR2632476B1 (fr) 1988-06-07 1988-06-07 Four a micro-ondes equipe d'un repartiteur d'ondes

Publications (2)

Publication Number Publication Date
EP0346194A1 EP0346194A1 (fr) 1989-12-13
EP0346194B1 true EP0346194B1 (fr) 1993-01-13

Family

ID=9367019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401526A Expired - Lifetime EP0346194B1 (fr) 1988-06-07 1989-06-02 Four à micro-ondes équipé d'un répartiteur d'ondes

Country Status (7)

Country Link
US (1) US4937418A (enrdf_load_stackoverflow)
EP (1) EP0346194B1 (enrdf_load_stackoverflow)
CA (1) CA1312121C (enrdf_load_stackoverflow)
DE (1) DE68904357T2 (enrdf_load_stackoverflow)
ES (1) ES2037440T3 (enrdf_load_stackoverflow)
FR (1) FR2632476B1 (enrdf_load_stackoverflow)
GR (1) GR3007259T3 (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920004977Y1 (ko) * 1990-05-29 1992-07-25 삼성전자 주식회사 바베큐 겸용 전자렌지의 구조
EP0788296B1 (en) 1994-04-07 2005-03-23 Matsushita Electric Industrial Co., Ltd. High-frequency heating device
DE69534104T2 (de) * 1994-10-20 2006-03-02 Matsushita Electric Industrial Co., Ltd., Kadoma Hochfrequenz-heizeinrichtung
AU7438796A (en) * 1995-10-11 1997-04-30 Wynberg, Daan Cooking utensil with stirring device for microwave oven
KR100200063B1 (ko) * 1995-11-10 1999-06-15 전주범 전자렌지의 고주파 분산장치
KR100208693B1 (ko) * 1996-12-27 1999-07-15 전주범 개선된 구조를 갖는 전자렌지용 도파관
US5919391A (en) * 1998-04-20 1999-07-06 Daewoo Electronics Co., Ltd. Microwave oven having arcuate concave portions in a cavity for distributing microwaves
US6268596B1 (en) * 1999-08-24 2001-07-31 Ut-Battelle, Llc Apparatus and method for microwave processing of liquids
GB2354144B (en) * 2000-03-23 2001-08-22 Merrychef Ltd Microwave heating
WO2003009646A2 (en) * 2001-07-20 2003-01-30 American Purification, Inc. Microwave desorber for removing contaminants from resin
KR20050122673A (ko) * 2004-06-25 2005-12-29 삼성전자주식회사 스탠바이 모드에서 디지털 셋탑박스의 전력을 절감하는방법 및 장치
US7498548B2 (en) * 2006-05-02 2009-03-03 Ranger Research, Inc. Microwave heating system and method for removing volatiles from adsorbent materials
GB2488335B (en) * 2011-02-23 2013-03-13 Licotec Ind Ltd Mixer for use in a microwave oven
CN108351109B (zh) * 2015-11-05 2019-11-22 松下知识产权经营株式会社 加热烹调器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265780A (en) * 1963-04-02 1966-08-09 Gen Motors Corp Method curing a foam insitu using a changing mode microwave generator
GB1543980A (en) * 1975-05-19 1979-04-11 Matsushita Electric Ind Co Ltd Microwave heating apparatus
FR2371226A1 (fr) * 1976-11-17 1978-06-16 Olivier Jean Applicateur pour soumettre une matiere a des ondes
US4208562A (en) * 1978-11-17 1980-06-17 Raytheon Company Cavity feed system
US4370534A (en) * 1979-04-09 1983-01-25 Deryck Brandon Apparatus and method for heating, thawing and/or demoisturizing materials and/or objects
GB2065458A (en) * 1979-12-13 1981-07-01 Mann B L S A cooking aid
US4460814A (en) * 1982-09-27 1984-07-17 Amana Refrigeration, Inc. Oven antenna probe for distributing energy in microwave
CA1207843A (en) * 1983-06-14 1986-07-15 Walter Wyslouzil Microwave applicator for frozen ground
FR2588063B1 (fr) * 1985-10-01 1987-12-18 Boulard Michel Four a micro-ondes a equipement mobile et accessoire pour ce four
SE450925B (sv) * 1985-12-06 1987-08-10 Por Microtrans Ab Mikrovagsenergioverforande s k applikator for 2,45 ghz
US4773317A (en) * 1987-01-29 1988-09-27 Wickboldt Jr Frank System for cooking dried food stuff

Also Published As

Publication number Publication date
DE68904357D1 (de) 1993-02-25
CA1312121C (fr) 1992-12-29
GR3007259T3 (enrdf_load_stackoverflow) 1993-07-30
FR2632476A1 (fr) 1989-12-08
DE68904357T2 (de) 1993-08-19
EP0346194A1 (fr) 1989-12-13
ES2037440T3 (es) 1993-06-16
US4937418A (en) 1990-06-26
FR2632476B1 (fr) 1990-08-31

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