EP1416773A2 - Door with seeing window for microwave apparatuses - Google Patents

Door with seeing window for microwave apparatuses Download PDF

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Publication number
EP1416773A2
EP1416773A2 EP03023145A EP03023145A EP1416773A2 EP 1416773 A2 EP1416773 A2 EP 1416773A2 EP 03023145 A EP03023145 A EP 03023145A EP 03023145 A EP03023145 A EP 03023145A EP 1416773 A2 EP1416773 A2 EP 1416773A2
Authority
EP
European Patent Office
Prior art keywords
door
metal
metal threads
door according
metallic
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.)
Withdrawn
Application number
EP03023145A
Other languages
German (de)
French (fr)
Inventor
Kurt Leutner
Dietrich Busch
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.)
Schott AG
Original Assignee
Carl Zeiss AG
Schott Glaswerke AG
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 Carl Zeiss AG, Schott Glaswerke AG filed Critical Carl Zeiss AG
Publication of EP1416773A2 publication Critical patent/EP1416773A2/en
Withdrawn legal-status Critical Current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 door with a window for Microwave devices according to the preamble of claim 1.
  • Doors for microwave ovens typically have a viewing window, to better observe the cooking process in the microwave oven can.
  • These viewing windows consist of two in a known manner a metallic frame spaced glass panes made of high temperature resistant glass. Since this glass is not in the irrelevant dimensions is also transparent for microwaves Viewing window area within the metallic frame one Shielding against microwave radiation is necessary.
  • This shield consists of a known device perforated, blackened metallic plate that is in the space between two glass panes is firmly attached and in conductive contact with the metallic frame.
  • This relatively massive perforated Metallic plate shields the microwave radiation in the required Dimensions, however, it significantly affects the visual insight into the inside of the microwave oven.
  • the invention is based on the object, starting from the designated door with a window for microwave ovens, with a metallic door frame in which two panes of glass are spaced are held, and with one in the space between the glass panes arranged metallic shielding for microwaves, which in the there is conductive contact with the metallic door frame with regard to the metallic shield so that on the one hand the required shielding against microwave radiation is reached, i.e. the legally prescribed limit values for the radiation values of the microwave oven are not exceeded, and on the other hand the visual look inside the Microwave device is practically not affected.
  • these tasks are solved in that the metallic shield from a fabric of thin Metal threads exist that are at a predetermined small distance from each other are interwoven.
  • the thin metal threads in the sense of the invention are metal threads whose Thickness is in the range of 0.02 mm to 0.1 mm, the thickness is preferably about 0.06 mm.
  • the specified small distance between the individual metal threads is preferably in the range of 0.09 mm to 0.5 mm and is in preferred dimensions about 0.12 mm.
  • the tissue has a so-called Plain weave with the warp thread alternately over and is under the weft. But also other ties of the threads, such as the twill weave, are of course conceivable.
  • the metal threads are preferably made of steel.
  • the fabric is as known Case the perforated plate, blackened.
  • the door shown in the drawing with a window for one Microwave device has a metallic frame 1, in which two Glass panes 2, 3 are held spaced.
  • the inside of the device facing glass pane 3 is preferably a brand glass Durax®, meanwhile the glass pane facing the surroundings 2 consists of glass from the Borofloat® brand or the Durax® brand.
  • the Glass panes 2, 3 are preferred in the metallic frame 1 glued by means of an adhesive 4.
  • a metallic shield 5 made of a thin fabric Metal threads, preferably steel threads, provided in the predetermined small distance are interwoven, preferably in the so-called plain weave, in which the warp thread in each case alternately above and below the weft threads.
  • This tissue 5 is on the inside of the outer glass pane 2 facing the Glass pane 3 applied, and is conductive to the frame 1st connected.
  • the metallic fabric 5 used for shielding is a very fine tissue, as is also the case with oil filters for Motor vehicles is used.
  • the thickness of the metal threads is in Range from 0.02 mm to 0.1 mm, preferably around 0.06 mm.
  • the mutual distance between the metal threads is in the range of 0.09 mm to 0.5 mm, preferably around 0.12 mm.
  • the fabric 5 used according to the invention is also blackened, either by blackening the metal threads to be woven or the tissue is subsequently blackened.
  • the invention can basically be used with all devices, in which a viewing window and a shield against electromagnetic radiation is required.

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

Abstract

The door for microwave oven etc. contains viewing window in metal frame (1) with two spaced glass panes (2,3), sandwiching metal screen for microwave radiation in conductive contact with metal door frame. The metal screen consists of web (5) of thin metal fibres in preset close positions. The thickness of metal fibres is preferably in region of 0.02 to 0.1 mm, typically approximately 0.06 mm. The fibre spacing may be 0.09 to 0.5 mm. The web may be woven as linen cloth and may be black.

Description

Die Erfindung bezieht sich auf eine Tür mit Sichtfenster für Mikrowellengeräte gemäß dem Oberbegriff des Anspruches 1.The invention relates to a door with a window for Microwave devices according to the preamble of claim 1.

Türen für Mikrowellengeräte weisen typischerweise ein Sichtfenster auf, um den Garvorgang im Mikrowellengerät besser beobachten zu können. Diese Sichtfenster bestehen in bekannter Weise aus zwei in einem metallischen Rahmen beabstandet angeordneten Glasscheiben aus hochtemperaturbeständigem Glas. Da dieses Glas im nicht unbeachtlichen Maße auch für Mikrowellen transparent ist, ist im Sichtfensterbereich innerhalb des metallischen Rahmens eine Abschirmung gegen die Mikrowellenstrahlung notwendig.Doors for microwave ovens typically have a viewing window, to better observe the cooking process in the microwave oven can. These viewing windows consist of two in a known manner a metallic frame spaced glass panes made of high temperature resistant glass. Since this glass is not in the irrelevant dimensions is also transparent for microwaves Viewing window area within the metallic frame one Shielding against microwave radiation is necessary.

Diese Abschirmung besteht bei bekannten Geräten aus einer perforierten, geschwärzten metallischen Platte, die im Raum zwischen beiden Glasscheiben fest angebracht ist und im leitenden Kontakt mit dem metallischen Rahmen steht. Diese relativ massive perforierte metallische Platte schirmt zwar die Mikrowellenstrahlung im geforderten Maße ab, sie beeinträchtigt jedoch signifikant den visuellen Einblick in das Innere des Mikrowellengerätes.This shield consists of a known device perforated, blackened metallic plate that is in the space between two glass panes is firmly attached and in conductive contact with the metallic frame. This relatively massive perforated Metallic plate shields the microwave radiation in the required Dimensions, however, it significantly affects the visual insight into the inside of the microwave oven.

Der Erfindung liegt die Aufgabe zugrunde, ausgehend von der eingangs bezeichneten Tür mit Sichtfenster für Mikrowellengeräte, mit einem metallischen Türrahmen, in dem zwei Glasscheiben beabstandet gehaltert sind, und mit einer im Raum zwischen den Glasscheiben angeordneten metallischen Abschirmung für Mikrowellen, die im leitenden Kontakt mit dem metallischen Türrahmen steht, diese hinsichtlich der metallischen Abschirmung so auszubilden, dass einerseits die geforderte Abschirmung gegen die Mikrowellenstrahlung erreicht wird, das heißt die gesetzlich vorgeschriebenen Grenzwerte für die Abstrahlwerte des Mikrowellengerätes nicht überschritten werden, und andererseits der visuelle Blick in das Innere des Mikrowellengerätes praktisch nicht beeinträchtigt wird.The invention is based on the object, starting from the designated door with a window for microwave ovens, with a metallic door frame in which two panes of glass are spaced are held, and with one in the space between the glass panes arranged metallic shielding for microwaves, which in the there is conductive contact with the metallic door frame with regard to the metallic shield so that on the one hand the required shielding against microwave radiation is reached, i.e. the legally prescribed limit values for the radiation values of the microwave oven are not exceeded, and on the other hand the visual look inside the Microwave device is practically not affected.

Die Lösung dieser Aufgaben gelingt erfindungsgemäß dadurch, dass die metallische Abschirmung aus einem Gewebe von dünnen Metallfäden besteht, die im vorgegebenen kleinen Abstand zueinander verwebt sind.According to the invention, these tasks are solved in that the metallic shield from a fabric of thin Metal threads exist that are at a predetermined small distance from each other are interwoven.

Dieses feine Gewebe schirmt, wie Versuche gezeigt haben, die Mikrowellenstrahlung im geforderten Maße ab und erlaubt überraschenderweise einen praktisch ungetrübten Einblick in das Innere des Gerätes; die Abschirmung wird sozusagen visuell nicht mehr wahrgenommen.This fine fabric shields, as experiments have shown that Microwave radiation to the extent required and allowed surprisingly a practically clear view of that Interior of the device; the shielding is no longer visual, so to speak perceived.

Die dünnen Metallfäden im Sinne der Erfindung sind Metallfäden, deren Dicke im Bereich von 0,02 mm bis 0,1 mm liegt, wobei die Dicke vorzugsweise zirka 0,06 mm beträgt.The thin metal threads in the sense of the invention are metal threads whose Thickness is in the range of 0.02 mm to 0.1 mm, the thickness is preferably about 0.06 mm.

Der vorgegebene kleine Abstand zwischen den einzelnen Metallfäden liegt vorzugsweise im Bereich von 0,09 mm bis 0,5 mm und beträgt im bevorzugten Maße zirka 0,12 mm.The specified small distance between the individual metal threads is preferably in the range of 0.09 mm to 0.5 mm and is in preferred dimensions about 0.12 mm.

Im einfachsten Fall weist das Gewebe eine sogenannte Leinwandbindung auf, bei der der Kettfaden abwechselnd über und unter den Schussfäden liegt. Aber auch andere Bindungen der Fäden, wie beispielsweise die Köper-Bindung, sind natürlich denkbar.In the simplest case, the tissue has a so-called Plain weave with the warp thread alternately over and is under the weft. But also other ties of the threads, such as the twill weave, are of course conceivable.

Damit die dünnen Metallfäden die ausreichende Reißfestigkeit haben, bestehen die Metallfäden vorzugsweise aus Stahl. So that the thin metal threads have sufficient tear resistance, the metal threads are preferably made of steel.

Um Streulichteffekte zu vermeiden, ist das Gewebe, wie im bekannten Fall die perforierte Platte, geschwärzt.To avoid stray light effects, the fabric is as known Case the perforated plate, blackened.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles wird die Erfindung näher erläutert.Based on an embodiment shown in the drawing the invention is explained in more detail.

Es zeigen:

Fig. 1
in einer Art Explosionsdarstellung den Aufbau der erfindungsgemäßen Tür mit Sichtfenster für ein Mikrowellengerät, und
Fig. 2
einen horizontalen Längsschnitt durch die Tür nach Fig. 1.
Show it:
Fig. 1
in a kind of exploded view the structure of the door according to the invention with a window for a microwave oven, and
Fig. 2
a horizontal longitudinal section through the door of FIG. 1st

Die in der Zeichnung dargestellte Tür mit Sichtfenster für ein Mikrowellengerät weist einen metallischen Rahmen 1 auf, in dem zwei Glasscheiben 2, 3 beabstandet gehaltert sind. Die dem Geräteinneren zugewandte Glasscheibe 3 ist vorzugsweise ein Glas der Marke Durax®, währenddessen die der Umgebung zugewandte Glasscheibe 2 aus Glas der Marke Borofloat® oder der Marke Durax® besteht. Die Glasscheiben 2, 3 sind in dem metallischen Rahmen 1 vorzugsweise mittels eines Klebers 4 eingeklebt.The door shown in the drawing with a window for one Microwave device has a metallic frame 1, in which two Glass panes 2, 3 are held spaced. The inside of the device facing glass pane 3 is preferably a brand glass Durax®, meanwhile the glass pane facing the surroundings 2 consists of glass from the Borofloat® brand or the Durax® brand. The Glass panes 2, 3 are preferred in the metallic frame 1 glued by means of an adhesive 4.

Zur Abschirmung der Mikrowellenstrahlung im Sichtfensterbereich ist eine metallische Abschirmung 5 aus einem Gewebe von dünnen Metallfäden, vorzugsweise Stahlfäden, vorgesehen, die im vorgegebenen kleinen Abstand zueinander verwebt sind, vorzugsweise in der sogenannten Leinwandbindung, bei der der Kettfaden jeweils abwechselnd über und unter den Schussfäden liegt. Dieses Gewebe 5 ist an der der äußeren Glasscheibe 2 zugewandten Innenseite der Glasscheibe 3 aufgebracht, und ist leitend mit dem Rahmen 1 verbunden. To shield the microwave radiation in the viewing window area a metallic shield 5 made of a thin fabric Metal threads, preferably steel threads, provided in the predetermined small distance are interwoven, preferably in the so-called plain weave, in which the warp thread in each case alternately above and below the weft threads. This tissue 5 is on the inside of the outer glass pane 2 facing the Glass pane 3 applied, and is conductive to the frame 1st connected.

Das zur Abschirmung eingesetzte metallische Gewebe 5 ist ein sehr feines Gewebe, wie es zum Beispiel auch bei Ölfiltern für Kraftfahrzeuge eingesetzt wird. Die Dicke der Metallfäden liegt im Bereich von 0,02 mm bis 0,1 mm, vorzugsweise bei zirka 0,06 mm.The metallic fabric 5 used for shielding is a very fine tissue, as is also the case with oil filters for Motor vehicles is used. The thickness of the metal threads is in Range from 0.02 mm to 0.1 mm, preferably around 0.06 mm.

Der gegenseitige Abstand der Metallfäden liegt im Bereich von 0,09 mm bis 0,5 mm, vorzugsweise bei zirka 0,12 mm.The mutual distance between the metal threads is in the range of 0.09 mm to 0.5 mm, preferably around 0.12 mm.

Das erfindungsgemäß eingesetzte Gewebe 5 ist ebenfalls geschwärzt, entweder dadurch, dass die zu verwebenden Metallfäden geschwärzt sind oder das Gewebe nachträglich geschwärzt wird.The fabric 5 used according to the invention is also blackened, either by blackening the metal threads to be woven or the tissue is subsequently blackened.

Die Erfindung kann grundsätzlich bei allen Geräten eingesetzt werden, bei denen ein Sichtfenster und eine Abschirmung gegen elektromagnetische Strahlung gefordert wird.The invention can basically be used with all devices, in which a viewing window and a shield against electromagnetic radiation is required.

Claims (8)

Tür mit Sichtfenster für Mikrowellengeräte, mit einem metallischen Türrahmen (1), in dem zwei Glasscheiben (2,3) beabstandet gehaltert sind, und mit einer im Raum zwischen den Glasscheiben (2,3) angeordneten metallischen Abschirmung für Mikrowellen, die im leitenden Kontakt mit dem metallischen Türrahmen (1) steht, dadurch gekennzeichnet, dass die metallische Abschirmung aus einem Gewebe (5) von dünnen Metallfäden besteht, die im vorgegebenen kleinen Abstand zueinander verwebt sind.Door with viewing window for microwave devices, with a metallic door frame (1) in which two glass panes (2, 3) are held at a distance, and with a metallic shield for microwaves arranged in the space between the glass panes (2, 3) for microwaves in conductive contact stands with the metallic door frame (1), characterized in that the metallic shield consists of a fabric (5) of thin metal threads which are woven at a predetermined small distance from one another. Tür nach Anspruch 1, dadurch gekennzeichnet, dass die Dicke der Metallfäden im Bereich von 0,02 mm bis 0,1 mm liegt.Door according to claim 1, characterized in that the thickness of the metal threads is in the range of 0.02 mm to 0.1 mm. Tür nach Anspruch 2, dadurch gekennzeichnet, dass die Dicke der Metallfäden zirka 0,06 mm beträgt.Door according to claim 2, characterized in that the thickness of the metal threads is approximately 0.06 mm. Tür nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der gegenseitige Abstand der Metallfäden im Bereich von 0,09 mm bis 0,5 mm liegt.Door according to one of claims 1 to 3, characterized in that the mutual distance between the metal threads is in the range of 0.09 mm to 0.5 mm. Tür nach Anspruch 4, dadurch gekennzeichnet, dass der gegenseitige Abstand der Metallfäden zirka 0,12 mm beträgt.Door according to claim 4, characterized in that the mutual spacing of the metal threads is approximately 0.12 mm. Tür nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Gewebe eine Leinwandbindung aufweist.Door according to one of claims 1 to 5, characterized in that the fabric has a plain weave. Tür nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Gewebe schwarz ist. Door according to one of claims 1 to 6, characterized in that the fabric is black. Tür nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Metallfäden Stahlfäden sind.Door according to one of claims 1 to 7, characterized in that the metal threads are steel threads.
EP03023145A 2002-10-29 2003-10-10 Door with seeing window for microwave apparatuses Withdrawn EP1416773A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10250298A DE10250298A1 (en) 2002-10-29 2002-10-29 Door with window for microwave ovens
DE10250298 2002-10-29

Publications (1)

Publication Number Publication Date
EP1416773A2 true EP1416773A2 (en) 2004-05-06

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ID=32087263

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EP03023145A Withdrawn EP1416773A2 (en) 2002-10-29 2003-10-10 Door with seeing window for microwave apparatuses

Country Status (5)

Country Link
US (1) US6828534B2 (en)
EP (1) EP1416773A2 (en)
CN (1) CN1499136A (en)
CA (1) CA2447366A1 (en)
DE (1) DE10250298A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008010620U1 (en) 2008-08-11 2008-10-23 Deutsche Mechatronics Gmbh Door assembly for a microwave oven and associated disk

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2020827B1 (en) * 2007-07-03 2013-10-23 Whirlpool Corporation Shielding system for microwave ovens and microwave oven using this shielding system.
EP2502475B1 (en) 2009-11-19 2018-07-04 Parker-Hannifin Corporation Conductive plastic overmold on shielded plastic window
CN101881473B (en) * 2010-07-15 2012-08-29 广东格兰仕微波炉电器制造有限公司 Microwave oven door structure
EP2731404B1 (en) * 2012-11-12 2020-04-08 Electrolux Home Products Corporation N.V. An oven door for a microwave oven or a multifunctional oven with microwave heating function
KR102527643B1 (en) * 2016-08-22 2023-05-03 삼성전자주식회사 Cooking appliance, door for cooking appliance and method for manufacturing door of cooking appliance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958754A (en) * 1958-12-15 1960-11-01 Gen Electric Electronic ovens
US3305623A (en) * 1964-10-19 1967-02-21 Metex Corp Shielded window construction
CA1038045A (en) * 1974-12-09 1978-09-05 Junzo Tanaka Transparent shielded door screen for microwave oven
US4678699A (en) * 1982-10-25 1987-07-07 Allied Corporation Stampable polymeric composite containing an EMI/RFI shielding layer
DE3545790C2 (en) * 1984-12-24 2001-04-12 Fukuvi Chem Ind Co Method for producing a transparent shielding material against electromagnetic waves.
US5012041A (en) * 1989-06-22 1991-04-30 The Curran Company Screened window for shielded enclosure
US6717047B2 (en) * 2001-08-27 2004-04-06 Hewlett-Packard Development Company, L.P. EMI enclosure having a flexible cable shield

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008010620U1 (en) 2008-08-11 2008-10-23 Deutsche Mechatronics Gmbh Door assembly for a microwave oven and associated disk

Also Published As

Publication number Publication date
US20040149748A1 (en) 2004-08-05
CN1499136A (en) 2004-05-26
DE10250298A1 (en) 2004-06-03
US6828534B2 (en) 2004-12-07
CA2447366A1 (en) 2004-04-29
DE10250298A9 (en) 2004-10-07

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