Door for a cooking appliance with a positioning element for a door profile and cooking appliance with such a door

Abstract

Door (4) for a cooking appliance (1), with a front panel (12) and at least one elongated door profile (14, 15) arranged on an inner side (12a) of the front panel (12), which is connected to an upper and a lower holding element (16, 17, 19, 20) which are fastened to the inner side (12a) of the front panel (12) and is held on the front panel (12), wherein a positioning element (18, 21) separate from the upper and lower holding elements (16, 17, 19, 20) is arranged on the inner side (12a) for adjusting the position of the door profile (14, 15), which positioning element is arranged between the upper and lower holding elements (16, 17, 19, 20) viewed in the longitudinal extension (A) of the door profile (14, 15) and is connected to the door profile (14, 15), characterized in that Positioning element (18, 21) is an L-shaped angle element,wherein a first plate-like leg part (22) lies flat against the inner side (12a) and a second leg part (23) is arranged free-standing from the first leg part (22), and in the assembled state of the door profile (14, 15) on the positioning element (18, 21), the second leg part (23) engages in a receptacle (29) of the door profile (14, 15), wherein the receptacle (29) is tapered starting from an insertion opening for the positioning element (18, 21), so that the formation of a clamping connection between the door profile (14, 15) and the positioning element (18, 21) is possible.

Description

[0001] The invention relates to a door for a cooking appliance having a front panel and at least one elongated door profile arranged on an inner side of the front panel, which is connected to an upper and a lower retaining element, which are attached to the inner side of the front panel, and is held on the front panel. Furthermore, the invention relates to a household appliance for preparing food having such a door.

[0002] A household appliance for preparing food in the form of a cooking appliance typically has a cooking chamber into which food can be placed for preparation. This cooking chamber can be closed at the front with a door. Such a cooking appliance can be an oven, for example.

[0003] Oven doors are known in various designs. In this context, it is known that such a door has several separate, parallel, at least partially transparent panels, which are referred to below as panes. In this context, a front pane, which is also referred to as the outer pane, is provided. A door also comprises at least a second pane, which is referred to as the inner pane and is positioned facing the cooking chamber when the door is closed. These at least two panes of a door are arranged and held spaced from one another by door profiles. It is also known that doors can have at least a third pane, which is then arranged between the outer pane and the inner pane. The technical structure of the oven door, which can vary, is located between the at least two panes.The panes and the technical structure are connected to the device by load-bearing door components, namely the door profiles. These door profiles are elongated parts that are attached parallel to each other on the inside of the outer pane. This attachment or connection can be achieved by a material bond, for example, by directly bonding the components. Furthermore, the components can also be mounted using force-fitting or form-fitting methods on pre-designed connection points on the panes.

[0004] DE 10 2005 033 225 A1 shows a household appliance door element with a front pane and connecting means for attaching door profiles to the front pane.

[0005] DE 10 2012 203 009 A1 discloses a support part with a locking device for an inner door pane of a cooking appliance door.

[0006] DE 10 2011 088 083 A1 discloses a door for an oven. Two mounting frames are glued to the inner side of the outer pane as holding elements for the door profile. The door profile also includes integrated support bars that extend at least partially through these mounting frames when the door profile is mounted on these mounting frames.

[0007] Particularly with door profiles attached in this way, undesirable deformation of the door profile can occur due to the design of the door profile during operation of the cooking appliance, in which very high temperatures can occur.

[0008] It is an object of the present invention to provide a door for a cooking appliance and also a cooking appliance of this type in which the dimensional stability of a door profile is improved during operation of the cooking appliance.

[0009] This object is achieved by a door and a cooking appliance according to the independent claims.

[0010] A door according to the invention for a cooking appliance comprises a front panel and at least one elongated door profile arranged on an inner side of the front panel. When the door is closed, the inner side of the front panel faces a food storage compartment of the household appliance.

[0011] The door profile is connected to an upper and a lower holding element and held to the windscreen via these holding elements. The holding elements are fastened to the inside of the windscreen. A key concept of the invention is that a positioning element, separate from the upper and lower holding elements, is arranged on the inside for adjusting the position of the door profile. This additional positioning element is arranged between the upper and lower holding elements in the longitudinal extension of the door profile and thus, viewed in the direction of the longitudinal axis of the door profile, and is connected to the door profile. By designing the door in this way, undesired deformation of the door profile, in particular bending into a plane parallel to the windscreen, can be avoided.

[0012] The positioning element is arranged at a distance from the two retaining elements, preferably centrally between the retaining elements as viewed along the longitudinal axis of the door profile, on the windscreen. This design and the equidistant positioning of the retaining elements from the positioning element particularly enhance the deformation stability of the door profile.

[0013] The positioning element is intended to be an L-shaped angle element. This design allows for a compact yet large-area installation and attachment of the positioning element to the inside of the windscreen. At the same time, the mechanical coupling and thus connection to the door profile is made very easy and, moreover, mechanically stable.

[0014] It is provided that a first plate-like leg part of the angle element rests flat against the inside of the windscreen and a second leg part of this angle part is arranged freely standing and protruding from the first leg part. This second leg part is arranged in the assembled state of the door profile on the positioning element so as to engage in a receptacle of the door profile. This achieves the mechanical coupling and positioning of the door profile in a particularly advantageous manner. Furthermore, due to this configuration and the engagement of this second leg part in this receptacle, this second leg part is also arranged in a virtually hidden manner, so that no undesired collision of other parts occurs and potential damage to the positioning element by other parts is prevented.

[0015] Preferably, the door profile receptacle is provided as a slot. This allows for particularly favorable insertion and receptacle, as well as a mechanical connection between the door profile and the positioning element.

[0016] The door profile receptacle is designed to be tapered, starting from an insertion opening provided for the positioning element. This allows for very simple and user-friendly insertion and plugging, allowing for a very effective insertion with play. However, it also ensures a mechanically stable fit and thus reliable positioning once installed. This design not only enables simple insertion with play, but also reliable clamping, thus creating a clamped connection between the door profile and the positioning element.

[0017] Preferably, the second leg part is designed to have a trapezoidal cross-section perpendicular to the height direction, at least in some areas, across its height. This very specific shape further enhances the aforementioned advantages. Furthermore, this second leg part is also mechanically highly stable and resistant to deformation, thus achieving particularly advantageous positioning and maintaining the position and shape of the door profile.

[0018] Preferably, the trapezoidal shape tapers from the end of the second leg portion facing the first leg portion to the end of the second leg portion facing away from the first leg portion. This configuration particularly enhances the aforementioned advantages and represents a particularly noteworthy embodiment.

[0019] Preferably, the second leg part has two raised, protruding clamping elements. This allows a mechanical clamping connection between the door profile and the positioning element to be designed to be particularly reliable and highly resilient. The at least two clamping elements also achieve a uniform clamping effect, preventing unwanted twisting or spreading of the positioning element during assembly with the door profile. This ensures the most uniform possible application of force during clamping between the door profile and the positioning element.

[0020] Preferably, the clamping elements are formed on side webs of the trapezoidal shape. These side webs thus protrude laterally from the trapezoid, quasi like flanges, and in this context form flap-shaped strips in which the clamping elements are formed. This design also allows the clamping elements to be individually designed in terms of surface area and shape, thus achieving a design in which the largest possible contact area is achieved between these clamping elements and the door profile, even in the clamped state.

[0021] Preferably, the clamping elements are formed in a middle third of the height of the second leg part, measured in the height direction of the second leg part. This location is advantageous because, when the second leg part is initially inserted into the receptacle of the door profile, these clamping elements do not yet interfere with or hinder the assembly process, thus enabling a relatively extensive insertion of the second leg part into the receptacle. Only during the further assembly path up to the final end position of the second leg part in the receptacle do the clamping elements then insert into the receptacle and mechanically contact a wall of this receptacle, thus maximizing the clamping effect.

[0022] Preferably, the clamping parts are round embossed portions in the second leg portion. This integral design prevents undesirable positional tolerances or displacement of the clamping parts relative to the second leg portion, and they can also withstand high mechanical loads.

[0023] Preferably, the door profile is made of plastic. This design allows for a very lightweight construction. Furthermore, these plastic profiles are easier and more cost-effective to manufacture and can also take on very complex shapes. This is not possible, or only possible to a very limited extent, with metal designs. However, the aforementioned problem is particularly prevalent with plastic parts, so that deformation under the influence of temperatures such as those that can occur in a cooking appliance during operation is particularly prevalent with such designs of a plastic door profile.

[0024] Especially in these embodiments, the additional attachment of at least one positioning element in addition to the two holding elements is particularly advantageous.

[0025] Preferably, the retaining elements and the positioning element are glued to the inside of the windscreen. This allows for a sufficiently fixed, permanent attachment, and also eliminates the need for complex drilling and screwing in the windscreen, which is made of glass or a glass material.

[0026] Preferably, it is also provided that, in the final assembled state of the second leg part, a partial region of the second leg part extending vertically above the clamping element(s) is arranged in the receptacle of the door profile without contact and thus at a distance from the walls that delimit the receptacle. By such a spaced and thus play-related arrangement of this upper partial region of the second leg part, expansions, in particular of the plastic material of the door profile, can be taken into account, so that here too, no undesirable mechanical stresses arise. On the other hand, the corresponding clamping effect and positional retention of the door profile is achieved by the particularly form-fitting contact of the clamping elements against a wall delimiting the receptacle.

[0027] The holding elements are preferably arranged such that they enable the door profile to be held in a first direction perpendicular to the longitudinal axis of the door profile, parallel to a plane of the windscreen. The positioning element, in contrast, is preferably arranged and designed such that the door profile is positioned in a direction perpendicular to this holding direction of the holding elements, and thus in a direction that extends perpendicular to the longitudinal axis and parallel to the plane of the windscreen, exactly opposite to the other mentioned direction. Through this arrangement and design of the holding elements and the positioning element for a door profile, the latter is held and positioned virtually counter to the deformation forces acting in a plane parallel to the windscreen.

[0028] Furthermore, the invention also relates to a cooking appliance having a cooking chamber for food that can be closed by a door according to the invention or an advantageous embodiment thereof. By designing the door with at least one additional positioning element per door profile, deformation stability is achieved both in the cold and in the warm state of this door profile, which is made in particular of plastic. Additional attachments that are placed, clipped, or plugged onto the door profiles also retain their position within the specified tolerance chain. This at least significantly reduces deformation of the door profiles, maintains the surface temperature, and maintains a cleaning effect with corresponding appliance variants. This is particularly true for pyrolysis-compatible cooking appliances.Especially with these cooking appliances, it can be ensured that the surface temperature of the door does not increase undesirably during pyrolysis operation and that the mechanical load-bearing capacity is ensured by the special properties, whereby this is particularly the case with cooking appliances in which the door is designed as a retractable door and can therefore be lowered into a storage space below the cooking chamber when open.

[0029] Further features of the invention emerge from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respective combination specified, but also in other combinations or on their own, without departing from the scope of the invention. Thus, embodiments are also to be considered encompassed and disclosed by the invention that are not explicitly shown and explained in the figures, but which emerge and can be produced by separate combinations of features from the explained embodiments.

[0030] Embodiments of the invention are explained in more detail below with reference to schematic drawings. They show: Fig. 1 a perspective view of an embodiment of a cooking appliance according to the invention; Fig. 2 a perspective view of an embodiment of a door according to the invention; Fig. 3 a view of the inside of the front window of the door according to Fig. 2; Fig. 4 a perspective view of the door according to Fig. 3 with door profiles removed; Fig. 5 a first view of an embodiment of a positioning element for positioning a door profile; Fig. 6 a perspective view of the positioning element according to Fig. 5; Fig. 7 a sectional view through the door according to Fig. 2 in the area of the positioning element; and Fig. 8 a sectional view through the door according to Fig. 2 in the area of an upper holding element.

[0031] In the figures, identical or functionally identical elements are provided with the same reference symbols.

[0032] In Fig. 1 shows a schematic representation of a cooking appliance designed as an oven 1. The oven 1 comprises a cooking chamber 2, which is delimited by the walls of a muffle 3. The muffle 3 has a loading opening at the front, which can be closed by a door 4. In the exemplary embodiment, the door 4 is a hinged door, which means that it is attached to a housing of the oven 1 and can be pivoted about a horizontal axis. However, the door 4 can also be a retractable door, which means that, when opened, it is recessed into a storage space formed beneath the cooking chamber 2 and separate therefrom.

[0033] With regard to number and position, the oven 1 also comprises a hob with cooking zones 5, 6, 7 and 8, shown only as an example. In addition, a display unit 9 and operating elements 10 and 11 of an operating device are also provided, also shown only as an example with regard to number and position.

[0034] In Fig. Figure 2 shows a perspective view of the door 4 in the assembled state. In the exemplary embodiment, the door 4 comprises a front panel, which is designed as an outer pane or front pane 12 and is made at least partially of glass, in particular entirely of glass. With regard to the structure of the door 4, the front pane 12 is arranged facing away from the cooking chamber 2 when the door 4 is closed.

[0035] In addition, the door 4 comprises an inner pane 13 arranged at a distance from and parallel to the outer pane or front pane 12. This is also preferably made of glass and, as shown in Fig. 2 in the exemplary embodiment is designed with smaller dimensions than the front window 12.

[0036] It can also be provided that at least one further third plate in the form of a disc is present, which is then designed as an intermediate disc and is arranged between the front disc 12 and the inner disc 13, which faces the cooking chamber 2 when the door 4 is closed.

[0037] In the exemplary embodiment, the front pane 12 and the inner pane 13 are connected to each other by a first door profile 14 and a second door profile 15. The door profiles 14 and 15 are elongated and rectilinear supports that are attached to the front pane 12.

[0038] In the exemplary embodiment, the door profiles 14 and 15 are made of plastic.

[0039] For holding and positioning a door profile 14, 15, holding elements and positioning elements are attached, in particular glued, to an inner side 12a of the front pane 12.

[0040] On an inner side 12a facing the inner pane 13, in the context as shown in Fig. 3, two holding elements 16, 17, 19 and 20 as well as one positioning element 18 and 21 are glued to each door profile 14, 15.

[0041] As can be seen, the holding elements 19 and 20, which are constructed identically, represent an upper holding element 19 and a lower holding element 20. The following explanations regarding the door profile 15 and the holding elements 19 and 20 as well as the positioning element 21 are also valid in a corresponding manner for the door profile 14, the holding elements 16 and 17 as well as the positioning element 18.

[0042] The door profile 15 is held in place by being attached to the retaining elements 19 and 20 as well as to the positioning element 21. The door profile 15 comprises a longitudinal axis A, which extends vertically and thus in the y-direction when the door 4 is closed.

[0043] Due to manufacturing processes during operation of the oven 1 and thus due to the corresponding temperature effects on the door profile 15, the door profile 15 tends to deform in the xy plane. This is at least reduced, and in particular prevented, by the holding elements 19 and 20 and the additional positioning element 21.

[0044] The holding elements 19 and 20 are designed and arranged as an upper holding element 19 and a lower holding element 20. In the exemplary embodiment, a positioning element 21 is arranged in between in the direction of the axis A, in particular centrally between the holding elements 19 and 20, and spaced from the holding elements 19 and 20.

[0045] In Fig. 3 also shows, according to the arrows in the positive and negative x-direction, the direction of the forces acting on the door profile 15 with regard to the deformation tendency. The retaining elements 19 and 20 as well as the positioning element 21 are designed and arranged in such a way that they counteract these force directions and thus maintain the dimensional stability and, in particular, the rectilinear design of the door profile 15.

[0046] In Fig. 4 is a perspective view of the door 4 with the front window 12 as shown in Fig. 3, with the door profiles 14 and 15 removed.

[0047] The holding elements 19 and 20, as shown in Fig. 2 are U-shaped angles with U-shaped side legs of different lengths or sizes. Recesses are formed in their bottom legs, which extend in the z-direction, through which elements of the door profile 15 extend, thereby achieving a holding effect.

[0048] As already mentioned in Fig. 4, the positioning element 21 is L-shaped and comprises a first side leg 22, which is glued flat to the inner side 12a, and a second side leg 23, which is oriented in a cantilevered manner, in particular projecting vertically therefrom.

[0049] In Fig. 5 shows a view of the second side leg 23 of the positioning element 21. This comprises, approximately centrally in the z-direction, an embossed portion having a trapezoidal shape 24. Lateral to the trapezoidal shape 24 are lateral webs 25 and 26, which also serve as flanges. At least one clamping element 27 and 28 is integrated into each of these side webs 25 and 26 by means of an embossed portion, wherein these embossed portions for producing the clamping elements 27 and 28 are oriented in the x-direction in the opposite direction to the embossed portion for producing the trapezoidal shape 24. Furthermore, the round-nub-like clamping elements 27 and 28 are formed, in the z-direction, at half the height of the second side leg 23.

[0050] In Fig. 6 shows a perspective view of the positioning element 21. The specific shape of the second leg part 23 can be seen. In this context, it can also be seen that the trapezoidal shape 24 tapers from an end facing the first leg part 22 to an end facing away from the first leg part 22. This trapezoidal shape 24 thus forms a pocket that bulges downwards and thus toward the first leg part 22.

[0051] In Fig. 7 is a sectional view in the xz-plane along the section line VII-VII in Fig. 2 shows the door 4 in the area of the positioning element 21. The final assembled state is shown. It can be seen in this context that the door profile 15 has a receptacle 29, which is formed in a pocket-like manner and into which the second leg part 23 is arranged so as to be immersed and clamped. This tapered shape of the second leg part 23 and in particular of the trapezoidal shape 24 is shown. The section in Fig. 7 is laid through the trapezoidal shape 24.

[0052] It can also be seen that the clamping element 28 is arranged completely in the receptacle 29 and rests over its entire surface against a wall 29a delimiting the receptacle 29.

[0053] Furthermore, a portion of the second leg portion 23, viewed in the z-direction, which extends above the clamping element 28, is arranged in a contact-free and non-contacting manner, and thus with a clearance, preferably of approximately 2 mm, to this wall 29a and an opposite further wall 29b, which delimits the receptacle 29 at the rear. Furthermore, the second leg portion 23 is also arranged at a distance from an upper wall 29c, which also delimits the receptacle 29.

[0054] On the other hand, the second leg part 23 is arranged in a bottom region 30, which is thus arranged close to the leg part 22, so as to bear against the wall 29b. This bearing, in conjunction with the bearing of the clamping element 28 against the wall 29a, results in the second leg part 23 being clamped in the receptacle 29.

[0055] The positioning element 21 is preferably made of metal. Accordingly, the holding elements 19 and 21 are preferably made of metal.

[0056] In Fig. Figure 8 is a sectional view in the xz plane of the door 4 along the section line VIII-VIII in Fig. 2 and thus a sectional view in the area of the upper holding element 19 is shown. The door profile 15, in conjunction with an engagement element 15a, extends through an opening 19a through the bottom leg of the U-shape of the holding element 19 and is thus held accordingly.

Claims

[1] Door (4) for a cooking appliance (1), comprising a front panel (12) and at least one elongated door profile (14, 15) arranged on an inner side (12a) of the front panel (12), which elongated door profile is connected to an upper and a lower holding element (16, 17, 19, 20) which are fastened to the inner side (12a) of the front panel (12) and is held on the front panel (12), wherein a positioning element (18, 21) separate from the upper and lower holding elements (16, 17, 19, 20) is arranged on the inner side (12a) for adjusting the position of the door profile (14, 15), which positioning element is arranged between the upper and lower holding elements (16, 17, 19, 20) as viewed in the longitudinal extension (A) of the door profile (14, 15) and is connected to the door profile (14, 15), characterized bythat the positioning element (18, 21) is an L-shaped angle element, wherein a first plate-like leg part (22) lies flat against the inner side (12a) and a second leg part (23) is arranged free-standing and protruding from the first leg part (22), and in the assembled state of the door profile (14, 15) on the positioning element (18, 21), the second leg part (23) engages in a receptacle (29) of the door profile (14, 15), wherein the receptacle (29) is tapered starting from an insertion opening for the positioning element (18, 21), so that the formation of a clamping connection between the door profile (14, 15) and the positioning element (18, 21) is possible. [2] Door (4) according to claim 1, characterized by that the receptacle (29) is a slot, in particular a tapered slot. [3] Door (4) according to claim 1 or 2, characterized bythat the second leg part (23) is trapezoidal in cross section perpendicular to the height direction, at least in regions over its height. [4] Door according to claim 3, characterized by that the trapezoidal shape (24) tapers from the end of the second leg part (23) facing the first leg part (22) to the end of the second leg part (23) facing away from the first leg part (22). [5] Door (4) according to one of the preceding claims, characterized by that the second leg part (23) has two raised projecting clamping elements (27, 28). [6] Door (4) according to claim 5, characterized by that the clamping elements (27, 28) are formed on side webs (25, 26) to form a trapezoidal shape (24). [7] Door (4) according to claim 5 or 6, characterized by that the clamping elements (27, 28) are formed in a middle third of the height measured in the height direction of the second leg part (23). [8] Door (4) according to one of claims 5 to 7, characterized by that the clamping elements (27, 28) are round knob-like embossings. [9] Door (4) according to one of the preceding claims, characterized by that the door profile (14, 15) is made of plastic. [10] Door (4) according to one of the preceding claims, characterized by that the holding elements (16, 17, 19, 20) and the positioning element (18, 21) are glued to the inside (12a). [11] Door (4) according to one of the preceding claims, characterized by that in the mounted state of the second leg part (23) in the receptacle (29) of the door profile (14, 15), a partial region of the second leg part (23) extending in the vertical direction above the positioning element (18, 21) is arranged contactlessly and thus at a distance from walls which delimit the receptacle (29). [12] Door (4) according to one of the preceding claims, characterized bythat the holding elements (16, 17, 19, 20) are arranged in such a way that holding of the door profile (14, 15) in a first direction (x) perpendicular to the longitudinal extent (A) of the door profile (14, 15) parallel to a plane of the front pane (12) is possible. [13] Door (4) according to claim 12, characterized by that the positioning element (18, 21) is arranged and designed such that a positioning of the door profile (14, 15) has an arrangement and design acting in a direction perpendicular to the first direction (x) of the holding elements (16, 17, 19, 20). [14] Household appliance for preparing food, in particular a cooking appliance (1), which has a receiving space (2) for food which can be closed by a door (4) according to one of the preceding claims.

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