EP2993414B1 - Cooking device with a flange surface - Google Patents

Description

The invention relates to a cooking appliance according to the preamble of claim 1. Conventional cooking appliances have a cooking chamber whose feed opening can be closed by a door. As a sealing and contact surface for the door is a feed opening frame-like from horizontal and vertical elements formed flange. In the past, it has proven to be technically demanding to design this flange to provide a sufficiently good sealing and abutment surface for the door since the high temperatures of the enamel coating as well as the pyrolytic cleaning process result in bending of the flange.

Moreover, from the document DE 10 2008 041 965 A1 a Gargeräteflansch according to the preamble of claim 1, which counteracts the sheet metal deformation caused by the enamel coating. For this purpose, affected segments of the flange are provided with a concave crown, so that in the final state as flat as possible contact surface for the door seal results.

Moreover, from the document EP 1 464 896 A1 a sheet metal part known which has at least one partial surface which is cambered in a predetermined direction. The document discloses only for sides, ceiling and floor a convex curvature with a radius. The object of the invention is to improve known cooking appliances. One possible improvement is to improve the flange so that it forms a sufficiently good sealing and abutment surface for the door. The object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.

The invention relates to a cooking appliance, in particular an oven with a cooking chamber whose feed opening is closed by a door, and a flange having horizontal and vertical flange surfaces which surround the feed opening like a frame, wherein the flange forms a stop surface for the door. Under a flange should in particular the Components are understood, which are formed in the region of the cooking chamber such that they serve the door as a sealing and contact surface. This component can be formed one or more parts. In this case, the flange consists essentially of horizontal and vertical flange surfaces which surround the feed opening in the manner of a frame and essentially extend between the inside of the door and the cooking space. For manufacturing reasons, these flange can be made of a component, preferably a sheet metal part or joined from several components, preferably welded.

It is proposed that the frame-like arranged horizontal and vertical flange surfaces together form a flange total area, which has a crown. The flange total area is to be understood as meaning the area which results from the totality of the horizontal and vertical flange surfaces, without considering separating lines, joining surfaces or other tool-related formations or recesses. In addition, the total area of the flange should also be fictitiously counted to the total flange area, which would result if the recess would not be punched out of the flange area to produce the charging opening. Under a crowning, in particular, a bulging deformation is to be understood, which is embossed into the total flange surface in order to obtain a higher stability by deformation. In addition, by means of a crowning the curvature or curvature of the horizontal and vertical flange surfaces around several axes creates a tension of the flange, which counteracts the tension occurring due to the high temperatures in the operating state.

Here, the crown on a convex curvature, which is pronounced towards the door. This design results in a total flange area, which is shaped spherically out of the cooking chamber. By this design of the flange, a very high dimensional accuracy during deep drawing can be achieved.

Here, the radius of the crowning in a central region of the horizontal and / or vertical Flanschflächen is less than at corners of the horizontal and / or vertical Flanschflächen. A corner region is to be understood in particular as the region in which horizontally and vertically arranged flange surfaces meet. Under a middle area should be in horizontal flange surfaces of the between left and right corner regions of the flange face in the middle, preferably arranged in the region of a vertical line of symmetry area. In the case of vertical flange surfaces, a central region is to be understood as the region arranged centrally between upper and lower corner regions of the flange surface, preferably in the region of a horizontal symmetry line. By means of this configuration results in a curvature of the flange total area, which is steeper in the central regions and thus achieves a high dimensional stability during enamelling.

Preferably, the crown has a radius of 1 m to 12 m. The preferred radius of the vertically extending flange surfaces is between 10 and 12 m, in particular 1040.6 mm, and the radius of the horizontally extending flange between 2 and 5 m, in particular 2903.4 mm at the horizontal flange surface above and 4340.4 mm at the below horizontally extending flange.

Preferably, the radius of the common crown extends homogeneously over the entire flange surface. Homogeneous is in particular an equal or continuous curvature of the total flange area to understand, which is particularly easy to represent.

Preferably, the flange has a stiffening element, whereby the flange total area can absorb higher forces and has a higher stability with respect to the door force acting on the flange.

Preferably, the stiffening element surrounds the flange surface substantially circumferentially. This configuration results in a flange which is circumferentially dimensionally stable.

Preferably, the stiffening element is arranged at least in sections at an angle to the flange surface, wherein the angle is preferably 90 °. By means of this stiffening of the flange, which is formed at an angle to the entire flange surface, an even higher deformation rigidity is produced.

Preferably, the flange is formed by a deep-drawing process, which particularly simple and accurate allows the production of cooking appliances according to the invention, in particular flanges.

Preferably, the flange has receptacles for a door seal. The frame-like arranged on the horizontal and vertical flange door seals have fasteners which engage in the flange side mounted recordings. By this arrangement, a particularly good positioning and thus sealing effect of the door seals is possible. Preferably, the receptacles are arranged in the corner regions of the flange total area.

Preferably, the flange has a material thickness of less than 1 mm, preferably less than 0.6 mm, in particular 0.5 mm. By such a thin flange the smallest possible thermal mass is ensured, which is conducive to lower energy consumption. In addition, a poorer heat conduction is achieved by a thin flange, which causes a low thermal load of the neighboring modules. In addition, due to the small sheet thickness winy material is necessary, which has a cost effect.

Fig. 1

eine schematische perspektivische Darstellung eines Ausführungsbeispiels eines erfindungsgemäßen Gargeräts;

Fig. 2

eine schematische perspektivische Darstellung eines Flansches; und

Fig. 3

eine Darstellung eines Flansches im Querschnitt.

Further advantages and details of the invention will be explained in more detail with reference to the embodiments illustrated in the schematic figures. Showing:

Fig. 1

a schematic perspective view of an embodiment of a cooking appliance according to the invention;

Fig. 2

a schematic perspective view of a flange; and

Fig. 3

an illustration of a flange in cross section.

In the figures, identical or functionally identical elements are provided with the same reference numerals.

Fig. 1 shows a perspective view of a cooking appliance 1 for preparing food, which is an oven in the embodiment. The cooking appliance 1 comprises a cooking chamber 2 which is delimited by the side walls 4 of the cooking chamber 2. At the front, the cooking chamber 2 has a charging opening, which can be closed by a door 6. As a sealing and contact surface for the door 6 is a flange 8, which surrounds the feed opening like a frame. This flange is formed from preferably two mutually substantially parallel horizontal flange surfaces 10 and preferably two substantially mutually parallel vertical flange surfaces 12.

Fig. 2 shows the flange 8 in a perspective view. This surrounding the feed opening frame-like flange 8 is formed of two, substantially parallel to each other horizontally oriented flange surfaces 10 and two, substantially parallel to each other vertically oriented flange surfaces 12. The horizontal flange surfaces, together with the vertical flange surfaces 12, form a total flange surface 14, which in the Fig. 3 was created to highlight the flat character. This total flange surface has a crown, which convexly convexly bulges out of the cooking chamber 2 out of the door 6 in the form of a curvature. The total flange 14 thus forms a special good sealing and contact surface, since the extending between the flange 8 and door 6 door seal 16 is always homogeneously acted upon by the closing force of the door and closes the gap between the door 6 and flange 8, even if the flange is deformed by the thermally induced deformation in the operating state. In the figure are also the corner regions E can be seen, which result in the theoretical superimposition of horizontal and vertical flange surfaces. Centrally located between the corner regions E are the middle regions M. The total flange surface 14 is surrounded by a stiffening element 18. The stiffening element 18 is located on the outer contour of the flange 8 and contributes to its stability, since this material conversion achieves a high degree of deformation. The door seal 16 located between the flange 8 and the door 6 is fastened either to the flange 8 or to the door 6. For attachment to the flange 8, in Fig. 2 not shown, receptacles 20, which are preferably arranged in corner portions E of the flange 8.

Fig. 3 shows the flange 8 in a horizontal cross section, with the left of the flange 8 of the cooking chamber 2 and the right door 6 would result. In this case, the fictitious flange total area 14, which results from the horizontal flange 10 and vertical flange 12, shown as a dashed line, as would be formed if no punched to create the feed opening would be present. From this view, there is also the globally protruding from the flange total crown B. In addition, you can see the flange frame-like surrounding stiffening element, which can absorb higher forces by its circumferential deformation and has a higher stability against the force acting on the flange door force.

LIST OF REFERENCE NUMBERS

1

Cooking appliance

2

oven

4

side walls

6

door

8th

flange

10

horizontal flange surface

12

vertical flange surface

14

Flanschgesamtfläche

16

door seal

18

stiffener

20

retaining element

R

radius

B

crown

M

the central region

e

corner

Claims (9)

1. Cooking device, in particular an oven with a cooking chamber (2), the loading opening of which can be closed by a door (6), and with a flange (8) having horizontal and vertical flange surfaces (10, 12) surrounding the loading opening like a frame, wherein the flange surfaces (10, 12) form a stop surface for the door (6), wherein the horizontal and vertical flange surfaces (10, 12) arranged like a frame together form a flange total surface (14), characterised in that the flange total surface (14) has a camber (B), wherein the flange total surface (14) is produced by the totality of the horizontal and vertical flange surfaces (10, 12), without taking dividing lines, joint surfaces or other tool-conditioned mouldings or recesses into consideration, and the total surface of the flange (8) is also notionally counted as part of the flange total surface (14) which would be produced if the recess to create the loading opening was not punched out from the flange surface, and wherein the camber (B) has a convex curvature which is pronounced in the direction of the door (6), wherein a radius (R) of the camber (B) is less in a central region (M) of the horizontal and/or vertical flange surfaces (10, 12) than at corner regions (E) of the horizontal and/or vertical flange surfaces (10, 12).
2. Cooking device according to claim 1, characterised in that the camber (B) has a radius (R) of 1 to 12 m.
3. Cooking device according to one of the preceding claims, characterised in that the radius (R) of the camber (B) is homogeneous.
4. Cooking device according to one of the preceding claims, characterised in that the flange (8) has at least one stiffening element (18).
5. Cooking device according to one of the preceding claims, characterised in that the stiffening element (18) surrounds the flange surfaces (10, 12) substantially circumferentially.
6. Cooking device according to one of the preceding claims, characterised in that the stiffening element (18) is arranged at least in sections at an angle to the flange total surface (14), preferably at an angle of substantially 90°.
7. Cooking device according to one of the preceding claims, characterised in that the flange (8) is produced by a deep-drawing process.
8. Cooking device according to one of the preceding claims, characterised in that the flange (8) has retaining elements (20) for a door seal (16), which are preferably arranged in corner regions (E) of the flange (8).
9. Cooking device according to one of the preceding claims, characterised in that the flange (8) has a material thickness of less than 1 mm, preferably less than 0.6 mm, in particular 0.5 mm.

Images