EP0049817B1 - Appareil de chauffage à micro-ondes ayant un dispositif d'étanchéité à la porte servant à éviter la fuite de micro-ondes - Google Patents

Appareil de chauffage à micro-ondes ayant un dispositif d'étanchéité à la porte servant à éviter la fuite de micro-ondes Download PDF

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Publication number
EP0049817B1
EP0049817B1 EP81107757A EP81107757A EP0049817B1 EP 0049817 B1 EP0049817 B1 EP 0049817B1 EP 81107757 A EP81107757 A EP 81107757A EP 81107757 A EP81107757 A EP 81107757A EP 0049817 B1 EP0049817 B1 EP 0049817B1
Authority
EP
European Patent Office
Prior art keywords
door
chamber
heating
choke
width
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
Application number
EP81107757A
Other languages
German (de)
English (en)
Other versions
EP0049817A1 (fr
Inventor
Nobuo Ikeda
Hirofumi Yoshimura
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
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP0049817A1 publication Critical patent/EP0049817A1/fr
Application granted granted Critical
Publication of EP0049817B1 publication Critical patent/EP0049817B1/fr
Expired 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
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • H05B6/763—Microwave radiation seals for doors

Definitions

  • the invention relates to a microwave heater with a seal on the door consisting of a boiler room, a high-frequency oscillator for feeding high-frequency energy into the boiler room, a door for opening and closing the front opening of the boiler room and a damping chamber in the door, the damping chamber being designed in this way that it extends into the boiler room and is delimited by an outer surface, between which and the inner wall of the door a gap remains parallel to which the elongated damping chamber extends, with the damping chamber having the door part projecting into the boiler room an outside of the boiler room connected door part, which lies on the inside of the door at the front opening of the boiler room.
  • the appliance door has a so-called microwave shield which projects into the heating chamber when the door is closed and which has a damping chamber with a length of a quarter of the wavelength of the high-frequency energy used or approximately 30 mm. This reduces the usable heating chamber space.
  • This damping chamber is adjoined by a door seal which, particularly in the presence of resistance heating elements in the heating chamber, but especially when pyrolytic self-cleaning agents are present, must be of considerable strength. This results in a considerable thickness of the door and a relatively large weight.
  • the damping chamber extends parallel to a gap between the circumference of the microwave shield and the heating chamber wall.
  • the invention has for its object to reduce the thickness of the door structure including the door part having the damping chamber without reducing the microwave tightness.
  • the indentation protrudes into the interior of the outer door part and protrudes beyond the inside of the door, it is possible to reduce the overall thickness of the door, a good microwave seal being obtained by the width of the indentation being greater than the inside width of the damping chamber perpendicular to the Longitudinal direction plus the clear width of the gap.
  • 1, 1 denotes the interior of a microwave oven, in which microwaves are fed in from a magnetron 2 as a high-frequency oscillator via a waveguide 3.
  • the radiation and distribution of the microwaves within the boiler room 1 takes place by means of a rotating antenna 4, which is provided at the top in the central region of the boiler room.
  • the front of the boiler room is accessible via an oven door 5 and can be closed by this.
  • the oven door 5 is provided with a damping chamber 6, which is designed such that it comes to rest in the boiler room when the door 5 is closed.
  • Reference numerals 7 and 8 denote electrical heating elements, 9 a fan for circulating the hot air and 10 a motor for driving the fan.
  • Fig. 2 the essential portion of the improvement of the seal according to the invention is shown in an enlarged partial sectional view, 11 denotes the inner wall surface of the boiler room and 12 the front wall.
  • FIG. 3 The usual structure of a damping chamber 6 on the door 5 is shown in FIG. 3. The full depth of the damping chamber reaches into the boiler room when the door is closed.
  • an area of the damping chamber is formed by an indentation 13 in the inside of the door, as a result of which the part of the damping chamber located in the heating chamber can be reduced and thus the thickness of the door can be reduced in accordance with the depth the indentation 13.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Electric Ovens (AREA)

Claims (2)

1 - Appareil de chauffage à micro-ondes avec un moyen d'étanchéité sur la porte, constitué par une chambre de chauffage (1), un oscillateur haute fréquence (2) pour l'alimentation en énergie haute fréquence de la chambre de chauffage (1), et une porte (5) pour ouvrir et fermer l'ouverture frontale de la chambre de chauffage, et une chambre d'atténuation (6) dans la porte, du type dans lequel la chambre d'atténuation est réalisée de telle façon qu'elle pénetre dans la chambre de chauffage et est limitée par une surface extérieure entre laquelle et la paroi intérieure de la porte subsiste une fente en parallèle de laquelle s'étend la chambre d'atténuation allongée, et dans lequel, à la partie de la porte qui pénètre dans la chambre de chauffage se raccorde une partie de porte qui se situe en dehors de la chambre de chauffage et qui prend appui, par une partie intérieure de la porte, contre l'ouverture frontale de la chambre de chauffage, caractérisé par le fait que la chambre d'atténuation se poursuit par une partie enfoncée (13) qui pénètre dans le sens longitudinal à l'intérieur de la partie extérieure de la porte et qui contourne le côté intérieur de la porte, et dont la largeur (W') est supérieure à la largeur dégagée (W) de la chambre d'atténuation, perpendiculairement à la direction longitudinale, augmentée de la largeur dégagée (G) de la fente.
2 - Appareil selon la revendication 1, caractérisée par le fait que pour une largeur W = 8 mm de la chambre d'atténuation et une distance G = 2,5 mm entre la chambre d'atténuation et la paroi intérieure de la chambre de chauffage, on choisit pour la partie enfoncée une largeur W égale à 8 mm.
EP81107757A 1980-10-03 1981-09-30 Appareil de chauffage à micro-ondes ayant un dispositif d'étanchéité à la porte servant à éviter la fuite de micro-ondes Expired EP0049817B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP138942/80 1980-10-03
JP55138942A JPS6047716B2 (ja) 1980-10-03 1980-10-03 高周波加熱装置

Publications (2)

Publication Number Publication Date
EP0049817A1 EP0049817A1 (fr) 1982-04-21
EP0049817B1 true EP0049817B1 (fr) 1986-04-30

Family

ID=15233746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81107757A Expired EP0049817B1 (fr) 1980-10-03 1981-09-30 Appareil de chauffage à micro-ondes ayant un dispositif d'étanchéité à la porte servant à éviter la fuite de micro-ondes

Country Status (6)

Country Link
US (1) US4449025A (fr)
EP (1) EP0049817B1 (fr)
JP (1) JPS6047716B2 (fr)
AU (1) AU547983B2 (fr)
CA (1) CA1174288A (fr)
DE (1) DE3174510D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE33657E (en) * 1982-08-25 1991-08-06 Matsushita Electric Industrial Co. Electromagnetic wave energy seal arrangement
US4523069A (en) * 1983-10-24 1985-06-11 General Electric Company Microwave oven door seal
DE3644920A1 (de) * 1986-03-07 1987-12-23 Bosch Siemens Hausgeraete Mikrowellenofen
KR950000247B1 (ko) * 1989-04-06 1995-01-12 주식회사 금성사 전자레인지의 고주파 누설 방지장치
GB0511459D0 (en) * 2005-06-06 2005-07-13 Glen Dimplex Home Appliances L Choke system and oven
EP2031939B1 (fr) * 2007-09-03 2013-02-27 Electrolux Home Products Corporation N.V. Dispositif de support à ondes pour porte de four à micro-ondes
US20130228568A1 (en) * 2012-03-02 2013-09-05 Illinois Tool Works Inc. Multiple choke system for containing wide frequency band rf leakage

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3668357A (en) * 1969-10-23 1972-06-06 Mitsubishi Electric Corp Microwave seal for electronic range
BE757877A (fr) * 1969-10-24 1971-04-01 Amana Refrigeration Inc Four a hyperfrequence
JPS4939571B1 (fr) * 1970-04-23 1974-10-26
US3629537A (en) * 1970-09-09 1971-12-21 Matsushita Electric Ind Co Ltd Microwave oven door seal having dual cavities fed by a biplanar transmission line
US4081647A (en) * 1976-05-10 1978-03-28 Roper Corporation Energy seal for a microwave oven
US4102041A (en) * 1977-03-28 1978-07-25 Amana Refrigeration, Inc. Method of making microwave oven seal structure
CA1111505A (fr) * 1977-08-01 1981-10-27 Junzo Tanaka Four a micro-ondes a porte de type tiroir a l'epreuve des fuites du rayonnement
JPS5463541U (fr) * 1977-10-14 1979-05-04
US4358653A (en) * 1977-11-25 1982-11-09 Raytheon Company Combination microwave oven
JPS5948517B2 (ja) * 1979-09-11 1984-11-27 松下電器産業株式会社 高周波加熱装置

Also Published As

Publication number Publication date
DE3174510D1 (en) 1986-06-05
AU7571681A (en) 1982-04-08
JPS6047716B2 (ja) 1985-10-23
JPS5763795A (en) 1982-04-17
EP0049817A1 (fr) 1982-04-21
AU547983B2 (en) 1985-11-14
US4449025A (en) 1984-05-15
CA1174288A (fr) 1984-09-11

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