EP0369911B1 - Tür für einen kombinierten Bratraum mit einer schwebenden Mikrowellendichtung - Google Patents

Tür für einen kombinierten Bratraum mit einer schwebenden Mikrowellendichtung Download PDF

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Publication number
EP0369911B1
EP0369911B1 EP19890440122 EP89440122A EP0369911B1 EP 0369911 B1 EP0369911 B1 EP 0369911B1 EP 19890440122 EP19890440122 EP 19890440122 EP 89440122 A EP89440122 A EP 89440122A EP 0369911 B1 EP0369911 B1 EP 0369911B1
Authority
EP
European Patent Office
Prior art keywords
door
floating
frame
door according
seal
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
EP19890440122
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English (en)
French (fr)
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EP0369911A1 (de
Inventor
Jean-Charles Reymann
Alfred Urban
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.)
DE DIETRICH EUROPEENNE D'ELECTROMENAGER
Original Assignee
DE DIETRICH EUROPEENNE D'ELECTROMENAGER
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Publication date
Application filed by DE DIETRICH EUROPEENNE D'ELECTROMENAGER filed Critical DE DIETRICH EUROPEENNE D'ELECTROMENAGER
Publication of EP0369911A1 publication Critical patent/EP0369911A1/de
Application granted granted Critical
Publication of EP0369911B1 publication Critical patent/EP0369911B1/de
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
    • H05B6/76—Prevention of microwave leakage, e.g. door sealings
    • H05B6/763—Microwave radiation seals for doors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F24C15/04—Doors specially adapted for stoves or ranges with transparent panels

Definitions

  • the invention relates to a door for a mixed cooking enclosure combining microwave cooking and traditional cooking by electrical resistances, in particular on an improvement made to the wave trap system.
  • the doors for mixed enclosures of this type are designed to fulfill the operating conditions specific to each cooking principle.
  • doors of this type consist of a monobloc assembly (frames and panes) as on a traditional enclosure, on which is fixed at the periphery, on the one hand a wave trap system as on microwave ovens simple and, on the other hand a door seal as on a traditional enclosure.
  • This type of fixed wave trap is active only during the door closing, it is less active as soon as the door comes off the muffle.
  • a floating door of this type is composed on the one hand of a door fixed by hinges on the block and on the other hand of a storm door, of dimensions smaller than the door, secured to the door by connections elastic, and mounted on the inside of the door.
  • the springs of the elastic connections are crushed and the storm door is regularly applied to the frame of the muffle ensuring sealing against vapors and fumes, whatever the deformations in one or more dimensions of said frame during the phases heating and / or cooling.
  • the floating storm door is only active when the door is closed.
  • the problem to be solved was therefore: how to maintain a door correctly applied to the enclosure, whatever the deformations of the enclosure due to the temperature (up to 500 ° C in pyrolysis, 300 ° C in cooking).
  • the solution currently used is to replace the usual door seal with an active microwave seal.
  • the main disadvantage is that the door seal crashes after some time of use, deforms and degrades with heat, and then no longer provides the desired seal, especially on the lower edge of the door where form folds.
  • the instructions for use also recommend regular replacement of this door seal after X hours of use.
  • the Applicant had the idea of using the principle of the floating door and of separating the wave trap from the door.
  • the floating door object of the invention, is formed by a door and a floating part also called a storm door and is characterized in that it is equipped with a wave trap device surrounding the floating storm door .
  • the elastic connections between door and storm door consist of flat springs, preferably four, one end of which is fixed, and the other end of which is held by a guide sleeve which can slide in an oblong hole. provided in said end.
  • the storm door applies the wave trap and the oven seal against the muffle, it provides two sealing functions: to vapors and to microwaves, knowing that the two cooking modes can be alternated or combined during a given cooking.
  • the storm door provides a third function: microwave sealing during the "pre-opening of the door"; the known floating door and the known wave trap being combined in a combination of means.
  • FIG. 2 shows, in sectional view and closed door, a mixed cooking chamber (100), traditional and microwave, formed mainly of a muffle (101), and a door floating (102).
  • the muffle (101) delimits a muffle cavity (105) whose side walls are equipped with steps (103). On its front face, the muffle (101) has a front edge (106) and an outer edge (104) surrounding the cavity (105).
  • the floating door (102) described and shown here is composed of a door (20) and a storm door (2).
  • the door (20) is linked to the block (101) by hinges (22), of the conventional type.
  • the axis of rotation (26) of the door is here horizontal and in the lower part of the muffle, it could in principle also be vertical to the left or right of the muffle, or else horizontal and in the upper part of the muffle.
  • the door (20) mainly consists of an exterior porthole (21) held by springs (27), a handle (23), a door frame (24).
  • the door frame (24) is equipped, in its upper part, with a right safety pin (25a) and a left safety pin (25b) ( Figure 1).
  • the safety pins (25a, 25b) cooperate with the two micro-contacts (107a, 107b) fixed on the outer edge of the muffle (104). The function of these micro-contacts is to cut the power to the microwave generator when the door is open.
  • the inner door (2) consists of an outer inner door frame (4), a door seal frame (5), a wave trap (1) and a trap reinforcement wave (3).
  • the outer door frame (4) is formed from a pressed sheet according to the preferred profile visible in FIGS. 5a and 5b.
  • the central area (4a) of the frame (4) is perforated in a known manner, to form a microwave screen and allow visibility through the floating door (102).
  • the wave trap (1) and its reinforcement (3) are of conventional design, and are fixed to the outer door frame (4).
  • An inner window (12) having the function of protecting the central zone (4a) perforated against grease projections is held by pinching between said central zone (4a) perforated and the edge (3a) of the reinforcement.
  • the groove (4b) completely surrounds the perforated area (4a) of the frame (4).
  • Another frame called pyrolytic frame (5) has the function of maintaining and positioning a door seal (10).
  • the door seal (10) is a glass silk braid, not active in the microwave, like the one used on simple traditional enclosures, its function is the usual function of sealing against vapors and fumes during cooking and the pyrolysis.
  • the frame (5) has a flat fixing edge (5a) and a groove (5b) for pinching the inner edge of the door seal (10) against the outer frame (4), so that the braid of the seal door (10) is held flat against the outer flat edge of the frame (4).
  • the seal (10) fully covers three of the edges of the frame (4), and partially covers the lower horizontal edge of said frame (4), to avoid the formation of folds by closing the door.
  • the frame (5) is fixed by its edge (5a) over the entire periphery of the frame (4) by means of rivets for example.
  • the storm door (2) is linked to the door (20) by elastic connections such as guided springs.
  • the springs are flat springs (8) shown in detail in Figures 6a and 6b.
  • Each flat spring in sheet metal has a flat central part (8c), two arms (8b) on either side of the central part (8c), each arm (8b) ending in one end (8a).
  • One end (8a) and the middle part (8c) have a hole for fixing, the other end (8a) has an oblong hole (8d) provided to cooperate with a guide sleeve (9).
  • the length of the oblong hole (8d) is a function of the length of the displacement of the middle part (8c), between the closed and open positions of the floating door (102).
  • the springs (8) are four in number, arranged between the door frame (24) and the outer door frame (4), and distributed on each side of the frame (4), between the groove (4b) and the edge of the frame (4) as shown in Figure 1.
  • the guide sleeve (9) and the ends of the arms (8a) are fixed to the frame (4), the middle part (8c) being fixed to the frame (24).
  • An intermediate window (11) is held between the two frames (4) and (24), it serves as a heat shield, in particular during the pyrolysis operations.
  • the floating storm door ensures both vapor and smoke tightness and microwave tightness whatever the relative deformations of the muffle due to temperature.
  • pre-opening a first step called "pre-opening" (see Figure 3) during which the pins (25a and 25b) are not yet released from the micro-contacts (107a, 107b), but during which the counter door is applied against the block under the action of the half-relaxed springs (8).
  • the wave trap therefore remains active even if the door (20) is detached from the edge of the muffle, the wave generator not yet being cut.
  • the deflection of the springs (8) is around 10 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)

Claims (9)

  1. Schwebetür für einen Raum zum kombinierten Garen, der das Garen mittels Mikrowellen und das traditionelle Garen mittels elektrischer Widerstände kombiniert, wobei die Schwebetür eine Tür (20) und ein Schwebeteil aufweist, das mit der Tür (20) über elastische Verbindungen verbunden ist, dadurch gekennzeichnet, daß sie überdies eine mit dem Schwebeteil verbundene Mikrowellenfalle aufweist.
  2. Schwebetür nach dem vorangehenden Anspruch, dadurch gekennzeichnet, daß das Schwebeteil, die sogenannte Vortür, einen aus einem Blech mit einem perforierten Mittelteil (4a) gebildeten Außenrahmen (4) der Vortür aufweist, auf dem die Mikrowellenfalle (1) und ihre Versteifung (3) festgelegt sind.
  3. Schwebetür nach Anspruch 2, dadurch gekennzeichnet, daß die Vortür überdies ein Innenfenster (12) aufweist, das durch Klemmen zwischen zwei Dichtungen gehalten ist, welche in einer Vertiefung (4b) des Außenrahmens (4) und in einem Randteil (3a) der Versteifung (3) angeordnet sind.
  4. Schwebetür nach Anspruch 2, dadurch gekennzeichnet, daß sie einen feuerfesten Rahmen (5) aufweist, der wenigstens einen ebenen Halterand (5a) und eine Vertiefung (5b) zur Anbringung einer Türdichtung (10) an wenigstens drei Rändern des Außenrahmens (4) aufweist.
  5. Schwebetür nach Anspruch 4, dadurch gekennzeichnet, daß die Türdichtung (10) ein gegenüber Mikrowellen nicht aktives Seidegeflecht ist.
  6. Schwebetür nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Vortür (2) mit der Tür (20) über Blattfedern (8) verbunden ist.
  7. Schwebetür nach dem vorangehenden Anspruch, dadurch gekennzeichnet, daß jede Blattfeder (8) ein ebenes Mittelteil (8c), das am Türrahmen (24) festgelegt ist, sowie zwei Arme (8b) beiderseits des Mittelteils aufweist, von denen jeder in ein Ende (8a) ausläuft, von denen eines am Außenrahmen (4) festgelegt ist, das andere ein Langloch (8d) als Führung aufweist und mit einer Führungsbuchse (9), die am Außenrahmen (4) befestigt ist, zusammenwirkt.
  8. Schwebetür nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, daß vier Blattfedern vorgesehen und zwischen der Vertiefung (4b) und dem Rand des Rahmens (4) auf jede Seite des Rahmens (4) verteilt sind.
  9. Schwebetür nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß sie überdies ein Zwischenfenster (11) aufweist, das zwischen dem Außenrahmen (4) und dem Türrahmen (24) gehalten ist.
EP19890440122 1988-11-17 1989-11-16 Tür für einen kombinierten Bratraum mit einer schwebenden Mikrowellendichtung Expired - Lifetime EP0369911B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8815213 1988-11-17
FR8815213A FR2639170B1 (fr) 1988-11-17 1988-11-17 Porte pour enceinte de cuisson mixte comportant un piege a ondes flottant

Publications (2)

Publication Number Publication Date
EP0369911A1 EP0369911A1 (de) 1990-05-23
EP0369911B1 true EP0369911B1 (de) 1994-03-30

Family

ID=9372119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890440122 Expired - Lifetime EP0369911B1 (de) 1988-11-17 1989-11-16 Tür für einen kombinierten Bratraum mit einer schwebenden Mikrowellendichtung

Country Status (3)

Country Link
EP (1) EP0369911B1 (de)
DE (1) DE68914253T2 (de)
FR (1) FR2639170B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10208042B4 (de) * 2002-02-25 2016-09-01 BSH Hausgeräte GmbH Türgriff

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1299065C (zh) * 2002-07-12 2007-02-07 乐金电子(天津)电器有限公司 微波炉的弹簧锁装置
KR100698212B1 (ko) 2005-05-20 2007-03-22 엘지전자 주식회사 전기 오븐 레인지용 오븐 도어
DE102010064091A1 (de) * 2010-12-23 2012-06-28 BSH Bosch und Siemens Hausgeräte GmbH Hochfrequenzgargerät
DE102010064092B4 (de) * 2010-12-23 2021-03-04 BSH Hausgeräte GmbH Garbehandlungsofen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB778878A (en) * 1955-04-24 1957-07-10 Revo Electric Company Ltd Oven, refrigerator and like doors
US2860026A (en) * 1956-03-08 1958-11-11 Gen Motors Corp Domestic appliance
DE1906621B1 (de) * 1969-02-11 1970-09-03 Licentia Gmbh Bratraumtuere fuer Kuechenherde
DE2102015A1 (de) * 1971-01-16 1972-07-27 Burger Eisenwerke Ag Bratraumtüre für Herde, insbesondere für Herde mit Selbstreinigung
US3666904A (en) * 1971-04-12 1972-05-30 Bowmar Tic Inc Microwave oven and door structure for minimizing leakage
US3808391A (en) * 1973-01-29 1974-04-30 Hobart Mfg Co Microwave oven door assembly
US4013861A (en) * 1975-08-13 1977-03-22 The Frymaster Corporation Microwave oven door seal
CA1111505A (en) * 1977-08-01 1981-10-27 Junzo Tanaka Microwave oven having a radiation leak-proof drawer type door
CH633413A5 (en) * 1978-11-08 1982-12-15 Prometheus Ag Fabrik Elektrisc Oven door with inspection window
IT8334016V0 (it) * 1983-04-07 1983-04-07 Zanussi A Spa Industrie Porta per forno combinato a gas o elettrico e a microonde.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10208042B4 (de) * 2002-02-25 2016-09-01 BSH Hausgeräte GmbH Türgriff

Also Published As

Publication number Publication date
DE68914253D1 (de) 1994-05-05
FR2639170B1 (fr) 1991-01-11
FR2639170A1 (fr) 1990-05-18
EP0369911A1 (de) 1990-05-23
DE68914253T2 (de) 1994-10-06

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