EP0369905A1 - Oven with a double door - Google Patents

Oven with a double door Download PDF

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Publication number
EP0369905A1
EP0369905A1 EP89420442A EP89420442A EP0369905A1 EP 0369905 A1 EP0369905 A1 EP 0369905A1 EP 89420442 A EP89420442 A EP 89420442A EP 89420442 A EP89420442 A EP 89420442A EP 0369905 A1 EP0369905 A1 EP 0369905A1
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EP
European Patent Office
Prior art keywords
enclosure
inner plate
wall
door
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.)
Granted
Application number
EP89420442A
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German (de)
French (fr)
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EP0369905B1 (en
Inventor
Jacques Faurel
Raymond Violi
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Societe Cooperative de Production Bourgeois SCOP
Original Assignee
Societe Cooperative de Production Bourgeois SCOP
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Application filed by Societe Cooperative de Production Bourgeois SCOP filed Critical Societe Cooperative de Production Bourgeois SCOP
Publication of EP0369905A1 publication Critical patent/EP0369905A1/en
Application granted granted Critical
Publication of EP0369905B1 publication Critical patent/EP0369905B1/en
Anticipated expiration legal-status Critical
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    • 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 present invention relates to ovens, such as ovens for cooking food, provided with an opening closable by a hinged door.
  • the door In traditional ovens, the door is a rigid frame articulated along one of its sides on the edge of the oven enclosure. A peripheral seal ensures the seal between the interior face of the door and the enclosure in the closed position.
  • the door is generally provided with a central wall in transparent material, bordered by the frame of which it is integral.
  • a first problem posed by traditional ovens is the rise in temperature of the door, which is in contact with the oven enclosure and heats up by conduction.
  • the central part of the door directly forms a wall limiting the enclosure, and heats up by radiation and convection.
  • the operation of the door requires the provision of exterior handles which are sufficiently thermally insulated from the rest of the door.
  • exterior handles which are sufficiently thermally insulated from the rest of the door.
  • a second problem posed by traditional ovens is the difficulty of obtaining a sufficient seal between the oven door and the oven enclosure, in particular in steam ovens. It is necessary to prevent the escape of steam during the operation of the oven. This sealing is made delicate by the differential expansions appearing between the door and the oven enclosure.
  • the oven door comprises: - a rigid outer wall articulated along a first side on a first edge of the enclosure, an inner plate, of dimension slightly greater than the opening of the enclosure, shaped to adapt to the opening of the enclosure and to close it in the closed position, the inner plate being fixed movably on the outer wall opposite its inner face, to which it is connected by connecting means allowing the relative displacement of the inner plate perpendicular to the outer wall, between two relative limit positions defined by stop means.
  • the connecting means comprise elastic means urging the inner plate away from the outer wall to press it, in the closed position, against the front face of the enclosure.
  • a seal is provided between the inner plate and the front face of the enclosure to ensure the seal in the closed position.
  • Such a structure is adapted to improve the seal at the peripheral seal between the inner plate and the oven enclosure, but does not solve the problem of the complete seal of the door.
  • the inner plate is fixed to the outer wall by rods, a first end of which is rigidly fixed to the outer wall and the second end of which carries a head forming a limit stop, the rod being slidably mounted in a slot. the inner plate; the vapor contained in the enclosure can thus escape into the light around the rod.
  • this structure is not suitable for obtaining good cooling of the outer door wall, because the inner plate comprises parts in contact with the outer wall, and the air contained between the inner plate and the outer wall s '' heats quickly by conduction through the plate and heats the outer wall.
  • the problem proposed by the invention is to ensure a tight closing of the oven, a closure compatible with steam cooking, while ensuring the possibility of partial opening of the door, in the event of internal overpressure in the oven enclosure, in satisfactory security conditions.
  • the door allows a steam exhaust, exhaust which is channeled to the sides and rapidly cooled, without producing a rapid jet, without opening the door, and without destroying the door.
  • the exterior door part is correctly insulated from the interior atmosphere of the oven enclosure, so that its temperature is relatively low.
  • Another object of the invention is to provide effective protection of the hot parts of the oven, and in particular of the peripheral portion of the interior shutter plate of the oven.
  • This protection is intended to prevent the user inadvertently grabbing the edges of the inner plate, this plate being particularly hot when an oven is opened.
  • This protection also prevents the user inadvertently colliding with the edges of the plate, which would risk breaking it or breaking its fixing means.
  • An object of the invention is to allow a rapid cooling step of the furnace by injecting water inside the enclosure. Such an injection produces a violent release of vapor, and therefore a sudden overpressure in the enclosure. It is then necessary to authorize a controlled escape of steam outside the enclosure, and the invention allows such an escape through the door.
  • a difficulty encountered in known ovens is the condensation of water on the interior wall of the door, in particular in steam ovens, since the door is relatively cold compared to the rest of the oven and the steam condenses thereon. . This results in significant water flows, and often an accumulation of water between the enclosure and the door above the seal. When the door is opened, this water flows abruptly, and can cause burns when it is still relatively hot.
  • Another advantage obtained by certain particular embodiments of the invention is to provide a closure such that the water of condensation which possibly forms on the door wall flows inside the enclosure, and does not do not stay between the door and the enclosure until the door opens.
  • the enclosure door comprises: - a rigid outer wall articulated along a first side on a first edge of the enclosure, - a seal to ensure the seal between the inner plate and the front face of the enclosure in the closed position, - an inner plate, of dimensions slightly greater than the opening of the enclosure, shaped to adapt to the opening of the enclosure and to close it in the closed position, disposed movably opposite the interior face of the outer wall, to which it is connected by connecting means allowing the relative displacement of the inner plate relative to the outer wall for their approximation or their relative distances between two relative limit positions defined by stop means, the means connecting comprising elastic means urging the inner plate away from the outer wall to press it, in the closed position, against the front face of the enclosure.
  • the outer wall is provided with hooking means allowing its selective locking in the closed position
  • the inner plate is continuous, to ensure total tightness in the closed position
  • the connection between the inner plate and the connecting means does not introduce any possible passage between the interior and the exterior of the enclosure
  • the outer wall is larger than the inner plate and has a peripheral portion which extends beyond the contour of the inner plate and which forms a protective return, the edge of which faces the front face of the enclosure
  • - passages are provided between the edges of the outer wall and the front face of the enclosure to allow natural convection of air between the outer wall and the inner plate and to allow the steam to exit and cool and prevent its progression frontal when the gas pressure prevailing inside the enclosure is sufficient to move the inner plate towards the outer wall against the elastic means.
  • the inner plate is made of transparent glass.
  • the obturation is ensured in a satisfactory manner whatever the temperature conditions, because the possible deformations of the glass plate during a rise in temperature are negligible.
  • the user can see the inside of the enclosure when the door is closed, on the one hand through a central wall of transparent material of the door, and on the other hand the interior plate of transparent glass.
  • the inner plate may advantageously comprise a layer ensuring the reflection of infrared rays towards the interior of the enclosure.
  • the layer ensuring the reflection of infrared rays is advantageously applied to its outer face, that is to say its face opposite the door wall. The reflective layer is thus protected, and nevertheless effectively ensures the reflection of infrared rays coming from inside the enclosure.
  • the connecting means between the inner plate and the outer door wall comprise guide rods, fixed perpendicularly in the vicinity of the edges of the plate, and sliding in corresponding passages of the outer door wall, each rod being biased by a spring pushing it away from the outer wall towards a limit stop.
  • an enclosure 1 such as an oven enclosure is limited by an upper wall 2, a lower wall 3, two side walls 4 and 5, a bottom not shown in the figures, and has an opening 6 opposite the bottom.
  • a door 7 is provided to close the opening 6 of the enclosure 1.
  • the door 7 comprises, in this embodiment, an outer wall 8 consisting of a rigid frame 80, for example metallic, articulated along a first vertical side 9 on the side wall 4 of the enclosure 1, in the vicinity of the edge of the opening 6.
  • the rigid frame 80 borders a central wall 10 of which it is integral.
  • the central wall 10 is a plate of transparent material such as glass.
  • the door further comprises an inner plate 11, shaped to fit on the opening 6 of the enclosure 1 and close it in the closed position as shown in Figures 2 to 4.
  • the plate interior 11 comprises guide rods, such as rods 12, 13, 14 and 15, fixed perpendicular to the plate in the vicinity of its edges.
  • rods 12, 13, 14 and 15 fixed perpendicular to the plate in the vicinity of its edges.
  • the rods are integral with the plate 11 at one of their ends, and are housed and slide in corresponding passages of the door frame 80, as shown in the figures.
  • Each rod is biased by a spring, such as the spring 16 associated with the rod 12, the spring 16 pushing the rod 12 away from the frame 80, the movement of the rod being limited by a stop not shown in the figures.
  • the inner plate 11 is movable relative to the outer wall 8, by sliding the rods 12 to 15 and compressing the springs, as shown by the double arrows 17.
  • the plate 11 has an outline whose dimensions are very close to the dimensions of the enclosure opening 6, and is arranged so that, in the closed position, the interior plate outline applies against the enclosure opening contour with the interposition of a seal 18.
  • the seal borders the contour of the inner plate 11. It therefore includes an inner groove 180 into which the peripheral edge of the inner plate 11 is inserted.
  • the inner plate 11 comes apply in abutment against the front face 21 of the enclosure 1 bordering the opening contour 6, and is held by the springs 16 compressed between said inner plate 11 and the door frame 80.
  • the outer door wall 8 is itself provided with hooking means allowing its selective locking on the oven enclosure in the closed position.
  • the attachment means can be of all types commonly used, and are therefore not shown in the drawings.
  • FIG. 5 There is shown in Figures 5 and 6 the detail of embodiment of a seal 18 according to an advantageous embodiment.
  • the seal has an external wing 19 and an internal wing 20, defining a section having the general shape of an L.
  • the internal wing 20 comes to bear against the internal face 22 of the enclosure opening edge, while the outer wing 19 bears against the front face 21 of the enclosure opening edge.
  • the seal is a deformable hollow profile, as shown in FIGS. 5 and 6, such that, when the outer wing 19 bears against the front face 21 of the enclosure opening edge, the seal deforms and its internal wing 20 moves radially to press against the internal face 22 of the enclosure opening.
  • the internal seal wing 20 is offset towards the center of the door, facilitating the introduction of the seal inside the opening 6 of the enclosure when the door is closed.
  • the fact that the internal wing 20 of seal 18 penetrates inside the opening 6 of the enclosure facilitates the channeling of condensed water towards the interior of the enclosure, avoiding the exit of water during the door opening.
  • the inner plate 11 is advantageously made of a glass plate comprising a layer reflecting the infrared rays.
  • the reflective layer is applied against the external face 23 of the plate 11. It is possible, for example, to use a plate of a material sold commercially under the brand name "Thermax" from the company Schott.
  • a light source such as a luminescent tube 24 is disposed in the door, carried by the frame 80, outside the inner plate 11.
  • the luminescent tube 24 is thus protected from the high temperature prevailing inside the enclosure 1, by the interposed inner plate 11.
  • An additional transparent protective plate 28 is further adapted to close the door housing 29 in which the luminescent tube 24 is placed.
  • a hollow zone 31 acting as a handle is provided on the outer face of the door frame 80, in the vertical upright 32 opposite the articulation.
  • the outer wall 8 is of larger dimensions than the inner plate 11, and has a peripheral portion which projects beyond the contour of the inner plate 11, and which forms a protective return whose edge, such as the edge 320, is opposite the front face 21 of the enclosure.
  • the space separating the edges 320 and the front face 21 defines passages 25 and 26 whose thickness E is advantageously between 0.5 and 3 centimeters.
  • the edges of the outer wall 8 project beyond the contour of the inner plate 11 at a distance D greater than 5 centimeters.
  • the inner face 32 of the outer wall 8 remains relatively spaced from the plane of the inner plate 11 over all or part of the distance D, to define an expansion volume V surrounding the periphery of the inner plate 11.
  • the depth of the volume V is advantageously greater than 1 centimeter, its width being greater than 4 centimeters.
  • springs such as spring 16 of suitable stiffness springs close to the preferred side must have a lower stiffness than springs close to the opposite side.
  • L air circulates between the external atmosphere and the space 30 formed between the internal plate 11 and the internal face 32 of the external wall 8.
  • the space 30 advantageously has a thickness of About 1 cm. This air circulation promotes the cooling of the central wall 10 of the door, and of the frame 80.
  • the passages 25 and 26 can advantageously be provided respectively in the lower part and in the upper part of the junction between the frame 80 and the enclosure 1. , to take advantage of the chimney effect and promote air circulation between the exterior wall and the enclosure.
  • the outer wall 8 advantageously has a shape in which the door 7 is curved, its inner face 32 facing the opening 6 of the enclosure being hollow.
  • the inner plate 11 is housed in the hollow formed by the inner face 32 of the door 7, is bordered by the expansion volume V, and is thus protected around its edges by the frame 80.
  • the edges of the frame 80 form a protective return of the inner plate 11. This provides mechanical protection of the inner plate 11, in particular preventing the inner plate 11 from being hooked and moved laterally in its plane, direction of movement in which the rods 12 to 15 have lower mechanical strength. And the user is prevented from touching the hot edges of the inner plate 11 when the oven is opened.
  • the inner plate 11 is fixed on the rods 12 to 15 in a removable manner, so that the user can easily separate the plate 11 from the rods for cleaning its face 23, and for cleaning the inner face 32 of the outer wall 8.
  • the inner plate 11 is fixed by only two rods 120 and 130 in the middle of two opposite sides perpendicular to the first side 9 of the wall outer 8, that is to say perpendicular to the hinge.
  • This possibility of pivoting can be ensured by articulations such as the articulation 131 , of axis II-II, formed in the intermediate part of the rods 120 and 130.
  • the outer wall returns 8 are spaced apart enough from the edges of the inner plate 11, to leave a sufficient volume V between the edges of the inner plate 11 and the inner wall 32 of the frame 80. In this case, by pivoting the inner plate 11, access to the space 30 between the inner plate 11 and the outer wall 8 is freed, allowing for example cleaning of the walls.

Abstract

The oven according to the invention comprises a double door, composed of a protruding rigid frame (80) which supports, by means of guide rods (12-13), an inner plate (11) which is stressed by means of springs (16). The closing is ensured by the inner plate (11) which slides relative to the frame (80), and supports a peripheral seal (18). <IMAGE>

Description

La présente invention concerne les fours, tels que les fours pour la cuisson d'aliments, munis d'une ouverture obturable par une porte articulée.The present invention relates to ovens, such as ovens for cooking food, provided with an opening closable by a hinged door.

Dans les fours traditionnels, la porte est un cadre rigide articulé selon l'un de ses côtés sur le bord de l'enceinte du four. Un joint d'étanchéité périphérique assure l'étanchéité entre la face intérieure de la porte et l'enceinte en position de fermeture. La porte est généralement munie d'une paroi centrale en matière transparente, bordée par le cadre dont elle est solidaire.In traditional ovens, the door is a rigid frame articulated along one of its sides on the edge of the oven enclosure. A peripheral seal ensures the seal between the interior face of the door and the enclosure in the closed position. The door is generally provided with a central wall in transparent material, bordered by the frame of which it is integral.

Un premier problème que posent les fours traditionnels est l'élévation de température de la porte, qui se trouve en contact de l'enceinte du four et s'échauffe par conduction. La partie centrale de porte forme directement paroi limitant l'enceinte, et s'échauffe par rayonnement et convection. Il en résulte que la manoeuvre de la porte nécessite de prévoir des poignées extérieures suffisamment isolées thermiquement du reste de la porte. Outre les inconvénients d'encombre­ment et d'esthétique inhérents à de telles poignées extérieures, on conçoit que la température relativement élevée de la porte elle-même constitue un élément dangereux, puisque l'utilisateur peut toucher la porte par mégarde.A first problem posed by traditional ovens is the rise in temperature of the door, which is in contact with the oven enclosure and heats up by conduction. The central part of the door directly forms a wall limiting the enclosure, and heats up by radiation and convection. As a result, the operation of the door requires the provision of exterior handles which are sufficiently thermally insulated from the rest of the door. In addition to the drawbacks of space and aesthetics inherent in such exterior handles, it is understood that the relatively high temperature of the door itself constitutes a dangerous element, since the user can accidentally touch the door.

D'autre part, dans les fours traditionnels, on constate que le cadre de porte, le plus souvent métallique, tend à se déformer et à se voiler en fonction de la température, de sorte que l'obturation devient défectueuse. Une telle structure s'avère inadaptée pour remplir les exigeances sévères d'étanchéité requises pour les fours modernes dans lesquels la cuisson peut s'effectuer à la vapeur.On the other hand, in traditional ovens, it is found that the door frame, most often metallic, tends to deform and veil as a function of the temperature, so that the obturation becomes defective. Such a structure turns out to be unsuitable for fulfilling the severe sealing requirements required for modern ovens in which cooking can be carried out with steam.

Un second problème que posent les fours traditionnels est la difficulté d'obtenir une étanchéité suffisante entre la porte de four et l'enceinte du four, notamment dans les fours à vapeur. Il faut en effet empêcher l'échappement de vapeur lors du fonctionnement du four. Cette étanchéité est rendue délicate par les dilatations différentielles apparaissant entre la porte et l'enceinte du four.A second problem posed by traditional ovens is the difficulty of obtaining a sufficient seal between the oven door and the oven enclosure, in particular in steam ovens. It is necessary to prevent the escape of steam during the operation of the oven. This sealing is made delicate by the differential expansions appearing between the door and the oven enclosure.

On a tenté de résoudre le problème de l'étanchéité, par exemple par une solution décrite dans le document DE-A-1 906 621. Dans cette solution, la porte de four comprend :
- une paroi extérieure rigide articulée selon un premier côté sur un premier bord de l'enceinte,
- une plaque intérieure, de dimension légèrement supérieure à l'ouver­ture de l'enceinte, conformée pour s'adapter sur l'ouverture de l'enceinte et l'obturer en position de fermeture, la plaque intérieure étant fixée de manière mobile sur la paroi extérieure en regard de sa face intérieure, à laquelle elle est reliée par des moyens de liaison autorisant le déplacement relatif de la plaque intérieure perpendiculai­rement à la paroi extérieure, entre deux positions relatives limites définies par des moyens de butée. Les moyens de liaison comprennent des moyens élastiques sollicitant la plaque intérieure à l'écart de la paroi extérieure pour la plaquer, en position de fermeture, contre la face frontale de l'enceinte. Un joint d'étanchéité est prévu entre la plaque intérieure et la face frontale de l'enceinte pour assurer l'étanchéité en position de fermeture.An attempt has been made to solve the problem of sealing, for example by a solution described in document DE-A-1 906 621. In this solution, the oven door comprises:
- a rigid outer wall articulated along a first side on a first edge of the enclosure,
an inner plate, of dimension slightly greater than the opening of the enclosure, shaped to adapt to the opening of the enclosure and to close it in the closed position, the inner plate being fixed movably on the outer wall opposite its inner face, to which it is connected by connecting means allowing the relative displacement of the inner plate perpendicular to the outer wall, between two relative limit positions defined by stop means. The connecting means comprise elastic means urging the inner plate away from the outer wall to press it, in the closed position, against the front face of the enclosure. A seal is provided between the inner plate and the front face of the enclosure to ensure the seal in the closed position.

Une telle structure est adaptée pour améliorer l'étanchéité au niveau du joint périphérique entre la plaque intérieure et l'enceinte du four, mais ne résout pas le problème de l'étanchéité totale de la porte. En effet, la plaque intérieure est fixée à la paroi extérieure par des tiges dont une première extrémité est fixée rigidement à la paroi extérieure et dont la seconde extrémité porte une tête formant butée de fin de course, la tige etant montée à coulissement dans une lumière de la plaque intérieure ; la vapeur contenue dans l'enceinte peut ainsi s'échapper dans la lumière autour de la tige.Such a structure is adapted to improve the seal at the peripheral seal between the inner plate and the oven enclosure, but does not solve the problem of the complete seal of the door. Indeed, the inner plate is fixed to the outer wall by rods, a first end of which is rigidly fixed to the outer wall and the second end of which carries a head forming a limit stop, the rod being slidably mounted in a slot. the inner plate; the vapor contained in the enclosure can thus escape into the light around the rod.

En outre, cette structure n'est pas adaptée pour obtenir un bon refroidissement de la paroi extérieure de porte, car la plaque intérieure comprend des parties en contact avec la paroi extérieure, et l'air contenu entre la plaque intérieure et la paroi extérieure s'échauffe rapidement par conduction à travers la plaque et échauffe la paroi extérieure.In addition, this structure is not suitable for obtaining good cooling of the outer door wall, because the inner plate comprises parts in contact with the outer wall, and the air contained between the inner plate and the outer wall s '' heats quickly by conduction through the plate and heats the outer wall.

Le problème proposé par l'invention est d'assurer une fermeture étanche de four, fermeture compatible avec une cuisson vapeur, tout en assurant une possibilité d'ouverture partielle de la porte, en cas de surpression interne dans l'enceinte du four, dans des conditions de sécurité satisfaisantes. Dans un tel cas de surpression interne, résultant par exemple d'une combustion accidentelle de matière dans l'enceinte du four, ou résultant d'une étape volontaire de refroidisse­ment accéléré du four par vaporisation d'eau, la porte autorise un échappement de vapeur, échappement qui est canalisé sur les côtés et rapidement refroidi, sans production de jet rapide, sans ouverture de porte, et sans destruction de la porte. Simultanément, la partie extérieure de porte est correctement isolée de l'atmosphère intérieure sde l'enceinte du four, de sorte que sa température est relativement basse.The problem proposed by the invention is to ensure a tight closing of the oven, a closure compatible with steam cooking, while ensuring the possibility of partial opening of the door, in the event of internal overpressure in the oven enclosure, in satisfactory security conditions. In such a case of internal overpressure, resulting for example from an accidental combustion of material in the oven enclosure, or resulting from a voluntary step of accelerated cooling of the oven by vaporization of water, the door allows a steam exhaust, exhaust which is channeled to the sides and rapidly cooled, without producing a rapid jet, without opening the door, and without destroying the door. At the same time, the exterior door part is correctly insulated from the interior atmosphere of the oven enclosure, so that its temperature is relatively low.

Un autre objet de l'invention est d'assurer une protection efficace des parties chaudes du four, et notamment de la portion périphérique de plaque intérieure d'obturation du four. Cette protection est destinée à empêcher que l'utilisateur n'agrippe par mégarde les bords de la plaque intérieure, cette plaque étant particulièrement chaude au moment de l'ouverture d'un four. Cette protection évite également que l'utilisateur heurte par mégarde les bords de plaque, ce qui risquerait de produire sa rupture ou la rupture de ses moyens de fixation.Another object of the invention is to provide effective protection of the hot parts of the oven, and in particular of the peripheral portion of the interior shutter plate of the oven. This protection is intended to prevent the user inadvertently grabbing the edges of the inner plate, this plate being particularly hot when an oven is opened. This protection also prevents the user inadvertently colliding with the edges of the plate, which would risk breaking it or breaking its fixing means.

Un objet de l'invention est de permettre une étape de refroidissement rapide du four par injection d'eau à l'intérieur de l'enceinte. Une telle injection produit un dégagement violent de vapeur, et donc une surpression brusque dans l'enceinte. Il faut alors autoriser un échappement contrôlé de vapeur hors de l'enceinte, et l'invention permet un tel échappement par la porte.An object of the invention is to allow a rapid cooling step of the furnace by injecting water inside the enclosure. Such an injection produces a violent release of vapor, and therefore a sudden overpressure in the enclosure. It is then necessary to authorize a controlled escape of steam outside the enclosure, and the invention allows such an escape through the door.

Une difficulté rencontrée dans les fours connus est la condensation d'eau sur la paroi intérieure de la porte, notamment dans les fours à vapeur, car la porte est relativement froide par rapport au reste du four et la vapeur vient se condenser sur celle-ci. Il en résulte des écoulements d'eau non négligeables, et souvent une accumula­tion d'eau entre l'enceinte et la porte au-dessus du joint d'étanchéité. A l'ouverture de la porte, cette eau s'écoule brusquement, et peut occasionner des brûlures lorsqu'elle est encore relativement chaude.A difficulty encountered in known ovens is the condensation of water on the interior wall of the door, in particular in steam ovens, since the door is relatively cold compared to the rest of the oven and the steam condenses thereon. . This results in significant water flows, and often an accumulation of water between the enclosure and the door above the seal. When the door is opened, this water flows abruptly, and can cause burns when it is still relatively hot.

Un autre avantage obtenu par certains modes de réalisation particuliers de l'invention est d'assurer une obturation telle que l'eau de condensation qui se forme éventuellement sur la paroi de porte s'écoule à l'intérieur de l'enceinte, et ne reste pas entre la porte et l'enceinte jusqu'à ouverture de la porte.Another advantage obtained by certain particular embodiments of the invention is to provide a closure such that the water of condensation which possibly forms on the door wall flows inside the enclosure, and does not do not stay between the door and the enclosure until the door opens.

Pour atteindre ces buts ainsi que d'autres, la porte d'enceinte selon la présente invention comprend :
- une paroi extérieure rigide articulée selon un premier côté sur un premier bord de l'enceinte,
- un joint d'étanchéité pour assurer l'étanchéité entre la plaque intérieure et la face frontale de l'enceinte en position de fermeture,
- une plaque intérieure, de dimensions légèrement supérieures à l'ouverture de l'enceinte, conformée pour s'adapter sur l'ouverture de l'enceinte et l'obturer en position de fermeture, disposée de manière mobile en regard de la face intérieure de la paroi extérieure, à laquelle elle est reliée par des moyens de liaison autorisant le déplacement relatif de la plaque intérieure par rapport à la paroi extérieure pour leurs rapprochements ou leurs éloignements relatifs entre deux positions relatives limites définies par des moyens de butée, les moyens de liaison comprenant des moyens élastiques sollicitant la plaque intérieure à l'écart de la paroi extérieure pour la plaquer, en position de fermeture, contre la face frontale de l'enceinte.
Selon l'invention :
- la paroi extérieure est pourvue de moyens d'accrochage permettant son verrouillage sélectif en position de fermeture,
- la plaque intérieure est continue, pour assurer une étanchéité totale en position de fermeture, la liaison entre la plaque intérieure et les moyens de liaison n'introduisent aucun passage possible entre l'inté­rieur et l'extérieur de l'enceinte,
- la paroi extérieure est de dimensions plus grandes que la plaque intérieure et comporte une portion périphérique qui déborde au-delà du contour de plaque intérieure et qui forme un retour de protection dont le bord est en regard de la face frontale de l'enceinte,
- des passages sont prévus entre les bords de paroi extérieure et la face frontale de l'enceinte pour permettre une convection naturelle d'air entre la paroi extérieure et la plaque intérieure et pour permettre la sortie et le refroidissement de la vapeur et interdire sa progression frontale lorsque la pression gazeuse régnant à l'intérieur de l'enceinte est suffisante pour déplacer la plaque intérieure vers la paroi extérieure à l'encontre des moyens élastiques.To achieve these and other objects, the enclosure door according to the present invention comprises:
- a rigid outer wall articulated along a first side on a first edge of the enclosure,
- a seal to ensure the seal between the inner plate and the front face of the enclosure in the closed position,
- an inner plate, of dimensions slightly greater than the opening of the enclosure, shaped to adapt to the opening of the enclosure and to close it in the closed position, disposed movably opposite the interior face of the outer wall, to which it is connected by connecting means allowing the relative displacement of the inner plate relative to the outer wall for their approximation or their relative distances between two relative limit positions defined by stop means, the means connecting comprising elastic means urging the inner plate away from the outer wall to press it, in the closed position, against the front face of the enclosure.
According to the invention:
- the outer wall is provided with hooking means allowing its selective locking in the closed position,
the inner plate is continuous, to ensure total tightness in the closed position, the connection between the inner plate and the connecting means does not introduce any possible passage between the interior and the exterior of the enclosure,
the outer wall is larger than the inner plate and has a peripheral portion which extends beyond the contour of the inner plate and which forms a protective return, the edge of which faces the front face of the enclosure,
- passages are provided between the edges of the outer wall and the front face of the enclosure to allow natural convection of air between the outer wall and the inner plate and to allow the steam to exit and cool and prevent its progression frontal when the gas pressure prevailing inside the enclosure is sufficient to move the inner plate towards the outer wall against the elastic means.

Selon un mode de réalisation, la plaque intérieure est réalisée en un verre transparent. Dans ce cas, l'obturation est assurée de manière satisfaisante quelles que soient les conditions de température, car les déformations éventuelles de la plaque de verre lors d'une élévation de température sont négligeables. En outre, l'utilisateur peut voir l'intérieur de l'enceinte lorsque la porte est fermée, à travers d'une part une paroi centrale en matière transparente de la porte, et d'autre part la plaque intérieure en verre transparent.According to one embodiment, the inner plate is made of transparent glass. In this case, the obturation is ensured in a satisfactory manner whatever the temperature conditions, because the possible deformations of the glass plate during a rise in temperature are negligible. In addition, the user can see the inside of the enclosure when the door is closed, on the one hand through a central wall of transparent material of the door, and on the other hand the interior plate of transparent glass.

La plaque intérieure peut avantageusement comprendre une couche assurant la réflexion des rayons infrarouges vers l'intérieur de l'enceinte. Dans le cas d'une plaque en verre, la couche assurant la réflexion des rayons infrarouges est avantageusement appliquée sur sa face extérieure, c'est-à-dire sa face en regard de la paroi de porte. La couche réflectrice est ainsi protégée, et assure cependant efficacement la réflexion des rayons infrarouges provenant de l'intérieur de l'enceinte.The inner plate may advantageously comprise a layer ensuring the reflection of infrared rays towards the interior of the enclosure. In the case of a glass plate, the layer ensuring the reflection of infrared rays is advantageously applied to its outer face, that is to say its face opposite the door wall. The reflective layer is thus protected, and nevertheless effectively ensures the reflection of infrared rays coming from inside the enclosure.

Selon un mode de réalisation, les moyens de liaison entre la plaque intérieure et la paroi extérieure de porte comprennent des tiges de guidage, fixées perpendiculairement au voisinage des bords de la plaque, et coulissant dans des passages correspondants de la paroi extérieure de porte, chaque tige étant sollicitée par un ressort la repoussant à l'écart de la paroi extérieure vers une butée de fin de course.According to one embodiment, the connecting means between the inner plate and the outer door wall comprise guide rods, fixed perpendicularly in the vicinity of the edges of the plate, and sliding in corresponding passages of the outer door wall, each rod being biased by a spring pushing it away from the outer wall towards a limit stop.

D'autres objets, caractéristiques et avantages de la présente invention ressortiront de la description suivante de modes de réalisa­tion particuliers, faite en relation avec les figures jointes, parmi lesquelles :

  • - la figure 1 est une élévation de la face intérieure d'une porte d'enceinte selon la présente invention ;
  • - la figure 2 est une vue de dessus en coupe selon le plan I-I de la figure 1 montrant une porte assemblée à une enceinte selon l'invention ;
  • - la figure 3 est une vue de côté en coupe selon le plan II-II de la figure 1, montrant une porte assemblée sur une enceinte, en position de fermeture ;
  • - la figure 4 est une vue de côté en coupe selon le plan III-III de la figure 1, montrant une porte selon l'invention assemblée sur une enceinte, en position de fermeture ; et
  • - les figures 5 et 6 représentent la déformation d'un joint d'étanchéité selon l'invention, lors de la fermeture.
Other objects, characteristics and advantages of the present invention will emerge from the following description of particular embodiments, given in relation to the attached figures, among which:
  • - Figure 1 is an elevation of the inner face of an enclosure door according to the present invention;
  • - Figure 2 is a top view in section along the plane II of Figure 1 showing a door assembled to an enclosure according to the invention;
  • - Figure 3 is a side view in section along the plane II-II of Figure 1, showing a door assembled on an enclosure, in the closed position;
  • - Figure 4 is a side view in section on the plane III-III of Figure 1, showing a door according to the invention assembled on an enclosure, in the closed position; and
  • - Figures 5 and 6 show the deformation of a seal according to the invention, upon closure.

Dans le mode de réalisation représenté sur les figures, une enceinte 1 telle qu'une enceinte de four est limitée par une paroi supérieure 2, une paroi inférieure 3, deux parois latérales 4 et 5, un fond non représenté sur les figures, et comporte une ouverture 6 opposée au fond. Une porte 7 est prévue pour obturer l'ouverture 6 de l'enceinte 1. La porte 7 comprend, dans ce mode de réalisation, une paroi extérieure 8 constituée d'un cadre rigide 80, par exemple métallique, articulé selon un premier côté vertical 9 sur la paroi latérale 4 de l'enceinte 1, au voisinage du bord de l'ouverture 6. Le cadre rigide 80 borde une paroi centrale 10 dont il est solidaire. La paroi centrale 10 est une plaque de matière transparente telle que du verre.In the embodiment shown in the figures, an enclosure 1 such as an oven enclosure is limited by an upper wall 2, a lower wall 3, two side walls 4 and 5, a bottom not shown in the figures, and has an opening 6 opposite the bottom. A door 7 is provided to close the opening 6 of the enclosure 1. The door 7 comprises, in this embodiment, an outer wall 8 consisting of a rigid frame 80, for example metallic, articulated along a first vertical side 9 on the side wall 4 of the enclosure 1, in the vicinity of the edge of the opening 6. The rigid frame 80 borders a central wall 10 of which it is integral. The central wall 10 is a plate of transparent material such as glass.

La porte, selon l'invention, comprend en outre une plaque intérieure 11, conformée pour s'adapter sur l'ouverture 6 de l'enceinte 1 et l'obturer en position de fermeture comme le représentent les figures 2 à 4. La plaque intérieure 11 comprend des tiges de guidage, telles que les tiges 12, 13, 14 et 15, fixées perpendiculairement à la plaque au voisinage de ses bords. Par exemple, pour une plaque 11 rectangulaire, on dispose une telle tige 12, 13, 14 ou 15 au voisinage de chaque coin de la plaque. En alternative, on dispose une tige 120 ou 130 au milieu de chaque bord de plaque intérieure 11 perpendiculaire au premier côté 9 de paroi extérieure 8. Les tiges sont solidaires de la plaque 11 selon l'une de leurs extrémités, et sont logées et coulissent dans des passages correspondants du cadre 80 de porte, comme le représentent les figures. Chaque tige est sollicitée par un ressort, tel que le ressort 16 associé à la tige 12, le ressort 16 repoussant la tige 12 à l'écart du cadre 80, le mouvement de la tige étant limité par une butée non représentée sur les figures.The door, according to the invention, further comprises an inner plate 11, shaped to fit on the opening 6 of the enclosure 1 and close it in the closed position as shown in Figures 2 to 4. The plate interior 11 comprises guide rods, such as rods 12, 13, 14 and 15, fixed perpendicular to the plate in the vicinity of its edges. For example, for a rectangular plate 11, there is such a rod 12, 13, 14 or 15 in the vicinity of each corner of the plate. Alternatively, there is a rod 120 or 130 in the middle of each edge of the inner plate 11 perpendicular to the first side 9 of the outer wall 8. The rods are integral with the plate 11 at one of their ends, and are housed and slide in corresponding passages of the door frame 80, as shown in the figures. Each rod is biased by a spring, such as the spring 16 associated with the rod 12, the spring 16 pushing the rod 12 away from the frame 80, the movement of the rod being limited by a stop not shown in the figures.

Ainsi, la plaque intérieure 11 est mobile par rapport à la paroi extérieure 8, par coulissement des tiges 12 à 15 et compression des ressorts, comme le représentent les doubles flèches 17.Thus, the inner plate 11 is movable relative to the outer wall 8, by sliding the rods 12 to 15 and compressing the springs, as shown by the double arrows 17.

Dans le mode de réalisation représenté sur les figures, la plaque 11 présente un contour dont les dimensions sont très proches des dimensions de l'ouverture 6 d'enceinte, et est disposée de façon que, en position de fermeture, le contour de plaque intérieure s'applique contre le contour d'ouverture d'enceinte avec interposition d'un joint d'étan­chéité 18.In the embodiment shown in the figures, the plate 11 has an outline whose dimensions are very close to the dimensions of the enclosure opening 6, and is arranged so that, in the closed position, the interior plate outline applies against the enclosure opening contour with the interposition of a seal 18.

Le joint d'étanchéité borde le contour de la plaque intérieure 11. Il comprend, pour cela, une rainure intérieure 180 dans laquelle vient s'insérer la tranche périphérique de la plaque intérieure 11.The seal borders the contour of the inner plate 11. It therefore includes an inner groove 180 into which the peripheral edge of the inner plate 11 is inserted.

Lors de la fermeture de la porte, la plaque intérieure 11 vient s'appliquer en butée contre la face frontale 21 de l'enceinte 1 bordant le contour d'ouverture 6, et est maintenue par les ressorts 16 comprimés entre ladite plaque intérieure 11 et le cadre 80 de porte. La paroi extérieure 8 de porte est elle-même pourvue de moyens d'accrochage permettant son verrouillage sélectif sur l'enceinte de four en position de fermeture. Les moyens d'accrochage peuvent être de tous types couramment utilisés, et ne sont donc pas représentés sur les dessins. Lors d'une surpression interne supérieure à un seuil prédéterminé, à l'intérieur de l'enceinte, la pression déplace légèrement la plaque intérieure 11 vers la porte 7 à l'encontre de l'effort des ressorts 16, de sorte que les gaz ou vapeurs peuvent s'échapper vers l'atmosphère extérieure entre la plaque 11 et les bords de l'ouverture 6 d'enceinte 1.When the door closes, the inner plate 11 comes apply in abutment against the front face 21 of the enclosure 1 bordering the opening contour 6, and is held by the springs 16 compressed between said inner plate 11 and the door frame 80. The outer door wall 8 is itself provided with hooking means allowing its selective locking on the oven enclosure in the closed position. The attachment means can be of all types commonly used, and are therefore not shown in the drawings. During an internal overpressure above a predetermined threshold, inside the enclosure, the pressure slightly displaces the internal plate 11 towards the door 7 against the force of the springs 16, so that the gases or vapors can escape to the outside atmosphere between the plate 11 and the edges of the enclosure opening 6 1.

On a représenté sur les figures 5 et 6 le détail de réalisation d'un joint d'étanchéité 18 selon un mode de réalisation avantageux. Le joint comporte une aile 19 externe et une aile 20 interne, définissant une section présentant la forme générale d'un L. En position de fermeture, représentée sur la figure 6, l'aile interne 20 vient en appui contre la face intérieure 22 du bord d'ouverture d'enceinte, tandis que l'aile externe 19 vient en appui contre la face frontale 21 du bord d'ouverture d'enceinte.There is shown in Figures 5 and 6 the detail of embodiment of a seal 18 according to an advantageous embodiment. The seal has an external wing 19 and an internal wing 20, defining a section having the general shape of an L. In the closed position, shown in FIG. 6, the internal wing 20 comes to bear against the internal face 22 of the enclosure opening edge, while the outer wing 19 bears against the front face 21 of the enclosure opening edge.

Avantageusement, le joint est un profilé creux déformable, comme le représentent les figures 5 et 6, tel que, lorsque l'aile externe 19 vient en appui contre la face frontale 21 du bord d'ouverture d'enceinte, le joint se déforme et son aile interne 20 se déplace radialement pour se plaquer contre la face intérieure 22 de l'ouverture d'enceinte. Tant que l'aile externe 19 n'est pas plaquée contre le bord d'ouverture d'enceinte, l'aile interne 20 de joint est décalée vers le centre de la porte, facilitant l'introduction du joint à l'intérieur de l'ouverture 6 d'enceinte lors de la fermeture de porte. Le fait que l'aile interne 20 de joint 18 pénètre à l'intérieur de l'ouverture 6 d'enceinte facilite la canalisation d'eau de condensation vers l'inté­rieur de l'enceinte, évitant la sortie d'eau lors de l'ouverture de la porte.Advantageously, the seal is a deformable hollow profile, as shown in FIGS. 5 and 6, such that, when the outer wing 19 bears against the front face 21 of the enclosure opening edge, the seal deforms and its internal wing 20 moves radially to press against the internal face 22 of the enclosure opening. As long as the external wing 19 is not pressed against the opening edge of the enclosure, the internal seal wing 20 is offset towards the center of the door, facilitating the introduction of the seal inside the opening 6 of the enclosure when the door is closed. The fact that the internal wing 20 of seal 18 penetrates inside the opening 6 of the enclosure facilitates the channeling of condensed water towards the interior of the enclosure, avoiding the exit of water during the door opening.

La plaque intérieure 11 est avantageusement réalisée en une plaque de verre comportant une couche réfléchissant les rayons infra­rouges. De préférence, la couche réfléchissante est appliquée contre la face externe 23 de la plaque 11. On peut par exemple utiliser une plaque en un matériau vendu dans le commerce sous la marque "Thermax" de la société Schott.The inner plate 11 is advantageously made of a glass plate comprising a layer reflecting the infrared rays. Preferably, the reflective layer is applied against the external face 23 of the plate 11. It is possible, for example, to use a plate of a material sold commercially under the brand name "Thermax" from the company Schott.

Une source lumineuse telle qu'un tube luminescent 24 est disposée dans la porte, portée par le cadre 80, à l'extérieur de la plaque intérieure 11. Le tube luminescent 24 se trouve ainsi protégé de la haute température régnant à l'intérieur de l'enceinte 1, par la plaque intérieure 11 interposée. Une plaque de protection 28 supplémen­taire transparente est en outre adaptée pour fermer le logement 29 de porte dans lequel est placé le tube luminescent 24.A light source such as a luminescent tube 24 is disposed in the door, carried by the frame 80, outside the inner plate 11. The luminescent tube 24 is thus protected from the high temperature prevailing inside the enclosure 1, by the interposed inner plate 11. An additional transparent protective plate 28 is further adapted to close the door housing 29 in which the luminescent tube 24 is placed.

Une zone creuse 31 faisant office de poignée est ménagée sur la face extérieure du cadre 80 de porte, dans le montant vertical 32 opposé à l'articulation.A hollow zone 31 acting as a handle is provided on the outer face of the door frame 80, in the vertical upright 32 opposite the articulation.

La paroi extérieure 8 est de dimensions plus grandes que la plaque intérieure 11, et comporte une portion périphérique qui déborde au-delà du contour de plaque intérieure 11, et qui forme un retour de protection dont le bord, tel que le bord 320, est en regard de la face frontale 21 de l'enceinte. L'espace séparant les bords 320 et la face frontale 21 définit des passages 25 et 26 dont l'épaisseur E est avantageusement comprise entre 0,5 et 3 centimètres. Les bords de paroi extérieure 8 débordent au-delà du contour de plaque intérieure 11 selon une distance D supérieure à 5 centimètres. La face intérieure 32 de paroi extérieure 8 reste relativement écartée du plan de la plaque intérieure 11 sur tout ou partie de la distance D, pour définir un volume d'expansion V entourant la périphérie de plaque intérieure 11. La profondeur du volume V est avantageusement supérieure à 1 centimètre, sa largeur étant supérieure à 4 centimètres. De cette façon, lorsque de la vapeur s'échappe hors de l'enceinte, en repoussant la plaque intérieure 11, la vapeur s'épanche en écoulement tourbillonnaire dans le volume V, puis s'échappe par les passages latéraux tels que les passages 25 et 26 dans lesquels elle est guidée par la face intérieure froide 32 de la paroi extérieure 8 et par la face frontale 21 de l'enceinte, ce qui refroidit rapidement la vapeur et interdit sa progression frontale vers l'avant du four.The outer wall 8 is of larger dimensions than the inner plate 11, and has a peripheral portion which projects beyond the contour of the inner plate 11, and which forms a protective return whose edge, such as the edge 320, is opposite the front face 21 of the enclosure. The space separating the edges 320 and the front face 21 defines passages 25 and 26 whose thickness E is advantageously between 0.5 and 3 centimeters. The edges of the outer wall 8 project beyond the contour of the inner plate 11 at a distance D greater than 5 centimeters. The inner face 32 of the outer wall 8 remains relatively spaced from the plane of the inner plate 11 over all or part of the distance D, to define an expansion volume V surrounding the periphery of the inner plate 11. The depth of the volume V is advantageously greater than 1 centimeter, its width being greater than 4 centimeters. In this way, when steam escapes from the enclosure, by pushing back the inner plate 11, the vapor expands in a vortex flow in the volume V, then escapes through the lateral passages such as the passages 25 and 26 in which it is guided by the cold internal face 32 of the external wall 8 and by the front face 21 of the enclosure, which rapidly cools the steam and prevents its front progression towards the front of the oven.

Selon un mode de réalisation avantageux, on peut privilégier l'échappement de vapeur selon l'un des côtés de la plaque intérieure 11, par exemple le côté supérieur. Cela est obtenu en choisissant des ressorts tels que le ressort 16 de raideurs appropriées : les ressorts proches du côté privilégié doivent avoir une raideur plus faible que les ressorts proches du côté opposé.According to an advantageous embodiment, it is possible to favor the exhaust of vapor along one of the sides of the inner plate 11, for example the upper side. This is achieved by choosing springs such as spring 16 of suitable stiffness: springs close to the preferred side must have a lower stiffness than springs close to the opposite side.

Les passages 25 et 26, ménagés entre le cadre 80 de paroi extérieure 8 et la face frontale 21 d'enceinte 1, permettent en outre une circulation d'air entre le cadre et les parois d'enceinte comme le représente la flèche 27. L'air circule entre l'atmosphère extérieure et l'espace 30 ménagé entre la plaque intérieure 11 et la face intérieure 32 de paroi extérieure 8. Dans les conditions habituelles d'utilisation, porte 7 fermée, l'espace 30 a avantageusement une épaisseur de 1 cm environ. Cette circulation d'air favorise le refroidissement de la paroi centrale 10 de porte, et du cadre 80. Les passages 25 et 26 peuvent avantageusement être ménagés respectivement en partie inférieure et en partie supérieure de la jonction entre le cadre 80 et l'enceinte 1, pour profiter de l'effet de cheminée et favoriser la circulation d'air entre la paroi extérieure et l'enceinte.The passages 25 and 26, formed between the frame 80 of the outer wall 8 and the front face 21 of the enclosure 1, also allow air circulation between the frame and the enclosure walls as shown by arrow 27. L air circulates between the external atmosphere and the space 30 formed between the internal plate 11 and the internal face 32 of the external wall 8. Under the usual conditions of use, door 7 closed, the space 30 advantageously has a thickness of About 1 cm. This air circulation promotes the cooling of the central wall 10 of the door, and of the frame 80. The passages 25 and 26 can advantageously be provided respectively in the lower part and in the upper part of the junction between the frame 80 and the enclosure 1. , to take advantage of the chimney effect and promote air circulation between the exterior wall and the enclosure.

Dans le mode de réalisation représenté sur les figures, la paroi extérieure 8 présente avantageusement une forme selon laquelle la porte 7 est galbée, sa face intérieure 32 en regard de l'ouverture 6 d'enceinte étant creuse. Selon cette disposition, la plaque intérieure 11 se loge dans le creux formé par la face intérieure 32 de porte 7, est bordée par le volume d'expansion V, et se trouve ainsi protégée selon ses pourtours par le cadre 80. Les bords du cadre 80 forment un retour de protection de la plaque intérieure 11. On assure ainsi une protection mécanique de la plaque intérieure 11, évitant notamment que la plaque intérieure 11 ne soit accrochée et déplacée latéralement dans son plan, direction de déplacement dans laquelle les tiges 12 à 15 présentent une résistance mécanique moindre. Et on évite que l'utilisateur touche les bords chauds de plaque intérieure 11 à l'ouverture du four.In the embodiment shown in the figures, the outer wall 8 advantageously has a shape in which the door 7 is curved, its inner face 32 facing the opening 6 of the enclosure being hollow. According to this arrangement, the inner plate 11 is housed in the hollow formed by the inner face 32 of the door 7, is bordered by the expansion volume V, and is thus protected around its edges by the frame 80. The edges of the frame 80 form a protective return of the inner plate 11. This provides mechanical protection of the inner plate 11, in particular preventing the inner plate 11 from being hooked and moved laterally in its plane, direction of movement in which the rods 12 to 15 have lower mechanical strength. And the user is prevented from touching the hot edges of the inner plate 11 when the oven is opened.

De préférence, lorsque l'on utilise 4 tiges 12 à 15, la plaque intérieure 11 est fixée sur les tiges 12 à 15 de manière démontable, de sorte que l'utilisateur peut aisément séparer la plaque 11 des tiges pour le nettoyage de sa face externe 23, et pour le nettoyage de la face intérieure 32 de paroi extérieure 8.Preferably, when 4 rods 12 to 15 are used, the inner plate 11 is fixed on the rods 12 to 15 in a removable manner, so that the user can easily separate the plate 11 from the rods for cleaning its face 23, and for cleaning the inner face 32 of the outer wall 8.

On pourra préférer le mode de réalisation dans lequel la plaque intérieure 11 est fixée par seulement deux tiges 120 et 130 au milieu de deux côtés opposés perpendiculaires au premier côté 9 de paroi extérieure 8, c'est-à-dire perpendiculaires à la charnière. Dans ce cas, on peut avantageusement prévoir une possibilité de pivotement de la plaque intérieure 11 autour de l'axe médian II-II perpendiculaire aux deux tiges 120 et 130. Cette possibilité de pivotement peut être assurée par des articulations telles que l'articulation 131, d'axe II-II, ménagées en partie intermédiaire des tiges 120 et 130. On prévoit alors que les retours de paroi extérieure 8 sont assez écartés des bords de plaque intérieure 11, pour laisser un volume V suffisant entre les bords de plaque intérieure 11 et la paroi intérieure 32 du cadre 80. Dans ce cas, par pivotement de la plaque intérieure 11, on libère l'accès à l'espace 30 compris entre la plaque intérieure 11 et la paroi extérieure 8, permettant par exemple un nettoyage des parois.We may prefer the embodiment in which the inner plate 11 is fixed by only two rods 120 and 130 in the middle of two opposite sides perpendicular to the first side 9 of the wall outer 8, that is to say perpendicular to the hinge. In this case, it is advantageously possible to provide a possibility of pivoting of the inner plate 11 around the median axis II-II perpendicular to the two rods 120 and 130. This possibility of pivoting can be ensured by articulations such as the articulation 131 , of axis II-II, formed in the intermediate part of the rods 120 and 130. It is then expected that the outer wall returns 8 are spaced apart enough from the edges of the inner plate 11, to leave a sufficient volume V between the edges of the inner plate 11 and the inner wall 32 of the frame 80. In this case, by pivoting the inner plate 11, access to the space 30 between the inner plate 11 and the outer wall 8 is freed, allowing for example cleaning of the walls.

La présente invention n'est pas limitée aux modes de réalisa­tion qui ont été explicitement décrits, mais elle en inclut les diverses variantes et généralisations contenues dans le domaine des revendica­tions ci-après.The present invention is not limited to the embodiments which have been explicitly described, but it includes the various variants and generalizations thereof contained in the field of claims below.

Claims (14)

1 - Enceinte (1) telle qu'un four, munie d'une ouverture (6) obturable par une porte (7) articulée, la porte (7) comprenant :
- une paroi extérieure (8) rigide articulée selon un premier côté (9) sur un premier bord (4) de l'enceinte,
- un joint d'étanchéité (18) pour assurer l'étanchéité entre la plaque intérieure (11) et la face frontale (21) de l'enceinte (1) en position de fermeture,
- une plaque intérieure (11), de dimensions légèrement supérieures à l'ouverture (6) de l'enceinte, conformée pour s'adapter sur l'ouverture (6) de l'enceinte et l'obturer en position de fermeture, disposée de manière mobile à l'écart de la face intérieure (32) de la paroi extérieure (8), à laquelle elle est reliée par des moyens de liaison (12-15) autorisant le déplacement relatif de la plaque intérieure (11) par rapport à la paroi extérieure (8) pour leurs rapprochements ou leurs éloignements relatifs, entre deux positions relatives limites définies par des moyens de butée, les moyens de liaison comprenant des moyens élastiques (16) sollicitant la plaque intérieure (11) à l'écart de la paroi extérieure (8) pour la plaquer, en position de fermeture, contre la face frontale (21) de l'enceinte (1),
caractérisée en ce que :
- la paroi extérieure (8) est pourvue de moyens d'accrochage permettant son verrouillage sélectif en position de fermeture,
- la plaque intérieure (11) est continue, pour assurer une étanchéité totale en position de fermeture, la liaison entre la plaque intérieure et les moyens de liaison (12-15, 16) n'introduisant aucun passage possible de vapeur entre l'intérieur et l'extérieur de l'enceinte,
- la paroi extérieure (8) est de dimensions plus grandes que la plaque intérieure (11) et comporte une portion périphérique qui déborde au-delà du contour de plaque intérieure (11) et qui forme un retour de protection dont le bord (320) est en regard de la face frontale (21) de l'enceinte,
- des passages 25-26 sont prévus entre les bords de paroi extérieure (8) et la face frontale (21) de l'enceinte (1) pour permettre une convection naturelle d'air dans l'espace (30) ménagé entre la paroi extérieure (8) et la plaque intérieure (11) et pour guider et refroidir la vapeur sortante lorsque la pression gazeuse régnant à l'intérieur de l'enceinte est suffisante pour déplacer la plaque intérieure (11) vers la paroi extérieure (8) à l'encontre des moyens élastiques (16).1 - Enclosure (1) such as an oven, provided with an opening (6) closable by a hinged door (7), the door (7) comprising:
- a rigid outer wall (8) articulated along a first side (9) on a first edge (4) of the enclosure,
- a seal (18) for sealing between the inner plate (11) and the front face (21) of the enclosure (1) in the closed position,
- an inner plate (11), of dimensions slightly greater than the opening (6) of the enclosure, shaped to fit on the opening (6) of the enclosure and close it in the closed position, arranged movably away from the inner face (32) of the outer wall (8), to which it is connected by connecting means (12-15) allowing the relative movement of the inner plate (11) relative to the outer wall (8) for their approximation or their relative distances, between two relative limit positions defined by stop means, the connecting means comprising elastic means (16) urging the inner plate (11) away from the outer wall (8) for pressing it, in the closed position, against the front face (21) of the enclosure (1),
characterized in that:
the external wall (8) is provided with attachment means allowing its selective locking in the closed position,
- the inner plate (11) is continuous, to ensure total tightness in the closed position, the connection between the inner plate and the connecting means (12-15, 16) introducing no possible passage of steam between the interior and outside the enclosure,
- The outer wall (8) is larger than the inner plate (11) and has a peripheral portion which projects beyond the contour of the inner plate (11) and which forms a protective return, the edge of which (320) is facing the front face (21) of the enclosure,
- passages 25-26 are provided between the edges of the outer wall (8) and the front face (21) of the enclosure (1) to allow natural convection of air in the space (30) formed between the wall outer (8) and the inner plate (11) and to guide and cool the outgoing vapor when the gas pressure prevailing inside the enclosure is sufficient to move the inner plate (11) towards the outer wall (8) against the elastic means (16). 2 - Enceinte selon la revendication 1, caractérisée en ce que les moyens de liaison entre la plaque intérieure (11) et la paroi extérieure (8) de porte comprennent au moins deux tiges de guidage (12-­15) fixées perpendiculairement au voisinage d'au moins deux bords opposés de la plaque (11), et coulissant dans des passages correspon­dants de la paroi extérieure (8), chaque tige étant sollicitée par un ressort (16) la repoussant à l'écart de la paroi extérieure (8) de porte, une butée de fin de course limitant l'écartement de la tige.2 - enclosure according to claim 1, characterized in that the connecting means between the inner plate (11) and the outer wall (8) of the door comprise at least two guide rods (12-15) fixed perpendicular to the vicinity of at least two opposite edges of the plate (11), and sliding in corresponding passages of the outer wall (8), each rod being biased by a spring (16) pushing it away from the outer wall (8) of door, a limit stop limiting the spacing of the rod. 3 - Enceinte selon la revendication 2, caractérisée en ce que les moyens de liaison comprennent quatre tiges de guidage (12, 13, 14, 15) fixées au voisinage des quatre coins de la plaque intérieure (11) et coulissant dans quatre passages correspondants de la paroi extérieure (8).3 - enclosure according to claim 2, characterized in that the connecting means comprise four guide rods (12, 13, 14, 15) fixed in the vicinity of the four corners of the inner plate (11) and sliding in four corresponding passages of the outer wall (8). 4 - Enceinte selon la revendication 2, caractérisée en ce que les moyens de liaison comprennent seulement deux tiges de guidage (120, 130) fixées respectivement au milieu de chacun des bords de plaque intérieure perpendiculaires au premier côté (9) de paroi extérieure (8), les tiges comportant des articulations (131) autorisant l'oscillation de la plaque intérieure (11) autour d'un axe médian perpendiculaire aux deux tiges.4 - enclosure according to claim 2, characterized in that the connecting means comprise only two guide rods (120, 130) fixed respectively in the middle of each of the edges of the inner plate perpendicular to the first side (9) of the outer wall (8 ), the rods comprising articulations (131) allowing the oscillation of the inner plate (11) around a median axis perpendicular to the two rods. 5 - Enceinte selon l'une quelconque des revendications 1 à 4, caractérisée en ce que les passages (25,26) ménagés entre les bords (320) de paroi extérieure (8) et la face frontale (21) ont une épaisseur (E) comprise entre 0,5 et 3 centimètres.5 - enclosure according to any one of claims 1 to 4, characterized in that the passages (25,26) formed between the edges (320) of the outer wall (8) and the front face (21) have a thickness (E ) between 0.5 and 3 centimeters. 6 - Enceinte selon l'une quelconque des revendications 1 à 5, caractérisée en ce que les bords de paroi extérieure (8) débordent au-­delà du contour de plaque intérieure (11) selon une distance (D) supérieure à 5 centimètres.6 - enclosure according to any one of claims 1 to 5, characterized in that the edges of the outer wall (8) project beyond the contour of the inner plate (11) by a distance (D) greater than 5 centimeters. 7 - Enceinte selon l'une quelconque des revendications 1 à 6, caractérisée en ce qu'un volume (V) d'expansion est ménagé entre les bords (320) de paroi extérieure (8) et le contour de plaque intérieure (11).7 - enclosure according to any one of claims 1 to 6, characterized in that a volume (V) of expansion is formed between the edges (320) of the outer wall (8) and the contour of the inner plate (11) . 8 - Enceinte selon l'une quelconque des revendications 1 à 7, caractérisée en ce que les moyens élastiques (16) présentent des raideurs différentes pour privilégier la sortie de vapeur selon l'un des côtés de la plaque intérieure (11).8 - enclosure according to any one of claims 1 to 7, characterized in that the elastic means (16) have different stiffnesses to favor the steam outlet according to one of the sides of the inner plate (11). 9 - Enceinte selon l'une quelconque des revendications 1 à 8, caractérisée en ce que :
- la plaque intérieure (11) est en verre transparent,
- la paroi extérieure (8) comprend un cadre rigide (80) entourant une paroi centrale (10) transparente.9 - Enclosure according to any one of claims 1 to 8, characterized in that:
- the inner plate (11) is made of transparent glass,
- The outer wall (8) comprises a rigid frame (80) surrounding a central wall (10) transparent. 10 - Enceinte selon la revendication 9, caractérisée en ce qu'une couche assurant la réflexion des rayons infrarouges est appliquée sur la face extérieure (23) de plaque intérieure (11).10 - enclosure according to claim 9, characterized in that a layer ensuring the reflection of infrared rays is applied to the outer face (23) of the inner plate (11). 11 - Enceinte selon l'une quelconque des revendications 1 à 10, caractérisée en ce que le joint d'étanchéité (18) borde le contour de la plaque intérieure (11).11 - Enclosure according to any one of claims 1 to 10, characterized in that the seal (18) borders the contour of the inner plate (11). 12 - Enceinte selon la revendication 11, caractérisée en ce que le joint d'étanchéité (18) comporte une aile externe (19) et une aile interne (20), l'aile externe (19) venant en appui contre la face frontale (21) du bord d'ouverture d'enceinte lorsque la porte est en position de fermeture, l'aile interne (20) du joint venant alors en appui contre la face intérieure (22) de l'ouverture d'enceinte.12 - Enclosure according to claim 11, characterized in that the seal (18) comprises an external wing (19) and an internal wing (20), the external wing (19) coming to bear against the front face ( 21) of the enclosure opening edge when the door is in the closed position, the internal wing (20) of the seal then coming to bear against the inner face (22) of the enclosure opening. 13 - Enceinte selon la revendication 12, caractérisée en ce que le joint d'étanchéité (18) est un profilé creux déformable, tel que, lorsque l'aile externe (19) du joint vient en appui contre la face frontale (21) d'enceinte, le joint se déforme et son aile interne (20) se déplace radialement pour se plaquer contre la face intérieure (22) de l'ouverture d'enceinte.13 - enclosure according to claim 12, characterized in that the seal (18) is a deformable hollow profile, such that, when the outer wing (19) of the seal abuts against the front face (21) d 'enclosure, the seal is deformed and its internal wing (20) moves radially to press against the inner face (22) of the enclosure opening. 14 - Enceinte selon l'une des revendications 9 ou 10, caractérisée en ce qu'une source de lumière (24) est insérée dans le cadre (80) de porte à l'extérieur de la plaque intérieure (11).14 - Enclosure according to one of claims 9 or 10, characterized in that a light source (24) is inserted in the door frame (80) outside the inner plate (11).
EP89420442A 1988-11-17 1989-11-15 Oven with a double door Expired - Lifetime EP0369905B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8815208 1988-11-17
FR8815208A FR2639097A1 (en) 1988-11-17 1988-11-17 DOUBLE DOOR OVEN

Publications (2)

Publication Number Publication Date
EP0369905A1 true EP0369905A1 (en) 1990-05-23
EP0369905B1 EP0369905B1 (en) 1992-07-29

Family

ID=9372116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89420442A Expired - Lifetime EP0369905B1 (en) 1988-11-17 1989-11-15 Oven with a double door

Country Status (5)

Country Link
US (1) US5022380A (en)
EP (1) EP0369905B1 (en)
DE (1) DE68902298T2 (en)
ES (1) ES2034730T3 (en)
FR (1) FR2639097A1 (en)

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ITMI20110274A1 (en) * 2011-02-23 2012-08-24 Foster S P A OVEN FOR HOUSEHOLD USE WITH DOUBLE DOOR
ES2395605A1 (en) * 2010-11-17 2013-02-13 BSH Electrodomésticos España S.A. Household appliance device (Machine-translation by Google Translate, not legally binding)
ES2394693R1 (en) * 2010-11-17 2013-02-25 Bsh Electrodomesticos Espana Home Appliance Device
EP2747515B1 (en) 2012-12-20 2021-03-03 Miele & Cie. KG Cooking device

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DE4315814C2 (en) * 1993-05-12 2003-06-18 Aeg Hausgeraete Gmbh Heated household appliance, such as a stove or oven
US5782231A (en) * 1997-02-24 1998-07-21 Temco Fireplace Products, Inc. Direct vent fireplace
US5960785A (en) * 1997-05-28 1999-10-05 American Trim, Llc Cooking range oven having insulated oven door with viewing system
US5887916A (en) * 1997-09-25 1999-03-30 Kason Industries, Inc. Safety door latch for pressurized ovens
FR2792713B1 (en) 1999-04-26 2001-07-20 Simon COLD DOOR OVEN
DE19933251A1 (en) * 1999-07-15 2001-01-25 Aeg Hausgeraete Gmbh Door for a device, in particular a cooking oven
DE10044376B4 (en) * 2000-09-08 2008-05-29 AEG Hausgeräte GmbH fryer
KR100468121B1 (en) 2002-06-29 2005-01-26 삼성전자주식회사 Microwave oven
DE10318859A1 (en) * 2003-04-25 2004-11-11 BSH Bosch und Siemens Hausgeräte GmbH Cooking appliance
DE10336138B3 (en) * 2003-08-04 2004-10-14 Miele & Cie. Kg Door for household equipment has clamping parts movable to locking position and panels fitted with play between elastic part and holding part
US7478502B2 (en) * 2003-08-14 2009-01-20 Gemtron Corporation Appliance doors
DE10341330A1 (en) * 2003-09-08 2005-03-31 BSH Bosch und Siemens Hausgeräte GmbH Household appliance has cold cathode tube built in to door around view window to illuminate inside
DE102007058942A1 (en) * 2007-12-07 2009-06-10 BSH Bosch und Siemens Hausgeräte GmbH Cooking appliance has cooking chamber with loading opening, door for closing loading opening, and illumination device which is partly arranged in door for illuminating cooking chamber
ITBO20080557A1 (en) * 2008-09-12 2010-03-13 Premark Feg Llc INDUSTRIAL OVEN
NL2002409C2 (en) * 2009-01-09 2010-07-13 D & J Holding B V SECURED FIREPLACE FOR STAKING GAS AND / OR FLUID LIQUID FUELS.
US9016270B2 (en) * 2011-01-05 2015-04-28 General Electric Company Window mounting for thermal expansion in an oven appliance
JP2013087962A (en) * 2011-10-13 2013-05-13 Panasonic Corp Heating cooker
CN103836964B (en) * 2012-11-26 2016-11-23 江苏华东炉业有限公司 Oven door sealing structure
DE102015100824A1 (en) * 2015-01-21 2016-07-21 Rational Ag Door and cooking appliance
KR20170101466A (en) * 2016-02-29 2017-09-06 삼성전자주식회사 Oven
DE102017220151A1 (en) * 2017-11-13 2019-05-16 BSH Hausgeräte GmbH Haushaltsgargerät

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GB864816A (en) * 1958-08-18 1961-04-06 Gen Electric Co Ltd Improvements in or relating to domestic cookers
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EP0183559A2 (en) * 1984-11-28 1986-06-04 Kent Heating Limited Heating apparatus

Cited By (4)

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Publication number Priority date Publication date Assignee Title
ES2395605A1 (en) * 2010-11-17 2013-02-13 BSH Electrodomésticos España S.A. Household appliance device (Machine-translation by Google Translate, not legally binding)
ES2394693R1 (en) * 2010-11-17 2013-02-25 Bsh Electrodomesticos Espana Home Appliance Device
ITMI20110274A1 (en) * 2011-02-23 2012-08-24 Foster S P A OVEN FOR HOUSEHOLD USE WITH DOUBLE DOOR
EP2747515B1 (en) 2012-12-20 2021-03-03 Miele & Cie. KG Cooking device

Also Published As

Publication number Publication date
EP0369905B1 (en) 1992-07-29
ES2034730T3 (en) 1993-04-01
FR2639097A1 (en) 1990-05-18
DE68902298D1 (en) 1992-09-03
DE68902298T2 (en) 1993-02-18
US5022380A (en) 1991-06-11

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