ES2741816T3 - Door for an appliance with a cover configured as a hybrid component for at least one door panel as well as an appliance with a door of this type - Google Patents

Abstract

Door (5) for a household appliance (1), with at least one plate-type door panel (6, 8 to 10) and with a slat-shaped cover (19), covering the door panel 6, 8 to 10) from above, at least in sections, and which is configured by at least two different materials, in which the cover (19) is configured as a hybrid component of at least two plastic and metal materials, characterized in that - the cover (19) has a metal core (20) piece, which is surrounded by plastic injection at least in sections and is welded or inserted into the plastic or knurled or stamped, or - because the cover (19) has a piece metal core (20), which is detachably non-destructively attached to a plastic shaped wrapping part, in particular is elastically engaged, in which the core part (20) is unit with the plastic in such a way that relative movement is made possible by different expansion of the material in the case of heat influence, in which the core part (20) is connected to the plastic part by means of a loose bearing and a fixed bearing and is arranged floating, at least in sections, in the plastic.

Description

DESCRIPTION

Door for an appliance with a cover configured as a hybrid component for at least one door panel as well as an appliance with a door of this type

The invention relates to a door for an appliance with at least one door panel of the plate type and with a slatted cover, which covers the door panel from above at least by sections, and which is configured by the At least two different materials. Moreover, the invention relates to an household appliance, in particular a cooking appliance, with such a door.

Doors of this type are known from documents DE 102006042177 A1 and EP 2416072 A1. In addition, publication Ep 2 159 489 A2 publishes a cooking appliance with a cooking appliance door as well as a method for manufacturing such a cooking appliance door. EP 2469 190 A1 publishes a cooking field with a top and a base piece. Finally, EP 0947776 A2 publishes a cooking oven with a refrigeration system.

These upper door covers are functionally subject to high requirements and, in addition, are also exposed to the most different operating conditions, so that they must also withstand, for example, multiple temperature influences and also humidity differences. .

The purpose of the present invention is to create a door for an electrical appliance as well as an electrical appliance of this type, in which the cover better meets the requirements set forth therein.

This task is solved by means of a door and an appliance according to the claims.

A door according to the invention for an home appliance comprises at least one door panel of the plate type and a strip-shaped cover, which covers the door panel from above at least by sections. An essential idea of the invention can be seen in that the cover is configured as a hybrid component of at least the plastic and metal materials. An essential advantage of the invention can be seen in that through a hybrid component of this type particular individual zones can be configured very accurately in a specific manner of the material. This has essential advantages in the configuration of very complex conformations of the individual partial zones of this cover of the different materials. Precisely the specified plastic and metal materials can be configured and developed very individually in the context with respect to the requirements to be satisfied in this case. The cover as a general piece can therefore be configured materially also in a very individual way and according to the needs regarding its use and use. In addition, precisely through such a hybrid component, a mechanically stable connection can also be created at interfaces with the at least two plastic and metal materials, so that lasting stability is also achieved here and high requirements can be met in a lasting manner.

It is foreseen that the cover has a core piece or an inner piece, which is configured of metal. This piece of core is surrounded by injection, at least by sections, with plastic. In this configuration, it can also be provided that different plastics are applied in different areas of the metal and in particular they are injection molded, so that the advantages mentioned above are deduced again. This allows a very local specific configuration of plastic materials in the core piece.

In particular, in such a configuration it is provided that the core piece be carried as a metal insert in an injection casting device and surrounded by injection with the plastic. Here it is envisaged that the joint between the metal core piece and the area that is constituted of plastic of the cover is configured in such a way that a relative movement is possible due to the expansion of the material especially different from the two materials in the case of a heat input. According to the invention, it is provided that the core piece is connected through a loose bearing and a fixed bearing with the at least one plastic and, at least by sections, is arranged almost floating in the plastic. Through an especially advantageous embodiment of this type, it is then achieved that, by virtue of different expansions of the length of both materials, a joint between the plastic and the metal is not released. Therefore, in this preferred embodiment, it is provided that the metal insert or the core piece can slide to a certain extent on the plastic part.

In another embodiment, it is provided that the cover has a metal core piece, which is surrounded and welded, at least in sections, with at least one plastic. This connection can be made, for example, through a heat source, through which at least one of the two materials is heated so that a welded joint is possible. Here too it is preferably provided that the joint is configured in such a way that a relative movement between the materials is possible. Therefore, a loose bearing and a fixed bearing are also provided here, so that during operation of the home appliance, especially of a home appliance cooking and the heat input that occurs in this way on the roof does not produce an indefinite curvature in the construction group through the different dilations of the length of the materials.

In another advantageous embodiment, it is provided that the cover has a metal core piece, which is removably non-destructively connected to a configured plastic wrap. in particular elastically fitted or knurled. Here, too, it is preferably provided that the core piece is connected with the plastic in such a way that a relative movement is possible by virtue of different material expansion in the case of heat input. Correspondingly, it is also applied here that a connection with a loose bearing and a fixed bearing is provided.

In particular, it is provided that in another embodiment the cover has a metal core piece, which is glued with a configured plastic wrap. Also here it is advantageous that the thickness of the adhesive and, therefore, the thickness of the layer and also in the material composition of the adhesive are selected in such a way that the different dilations of the length of the materials in the operation of the household appliance allow a relative movement of metal and plastic, without destroying the bond of the adhesive.

In another advantageous embodiment it is provided that the plastic has at least two different types with respect to temperature resistance and a first configured plastic zone of the hybrid component of a plastic with a first temperature resistance and a second configured zone plastic of the hybrid component of a plastic with a second temperature resistance different from the first. In this way it can be provided that at least a partial area of the cover is formed of a high temperature resistant plastic. This is especially that area that is exposed, for example, through air circulation or other factors at high temperatures in the operation of the home appliance. In particular, it is provided that another partial area of the cover with respect to the temperature impulse in the operation of the household appliance is configured of metal and an area exposed in the operation of the household appliance at reduced temperatures compared to the other temperatures is configured of a plastic with reduced temperature resistance.

It may be provided that the cover has a piece of plastic core, which is surrounded by injection, at least by sections, with metal, in particular an IM component (In-Mold) or an IMD component (Decoration-In-Mold). In particular, in such components manufactured in the specified manner, a sheet, for example stainless steel, is injected from behind on the plastic core piece. In this configuration, a visible metal surface is then generated, although the cover is not a solid metal component. However, in this way a corresponding impression is transmitted.

Preferably, a heat decoupling element is configured between the metal and the plastic. This may be, for example, a high temperature resistant plastic or a glass silk seal or an intermediate layer of graphite or an elastomer. Preferably, it is provided that interruptions, for example for the passage of air circulations or grooves in the core piece, which is specially configured of metal, are adapted to the muffle flange of the household appliance configured as a cooking appliance. This tab comprises steps between the door and a suction channel. Preferably, the cross-section of the steps is configured with at least 2000 mm2. In this way a corresponding volumetric air flow is achieved from the door through the metal part of the cover and a corresponding aspiration is possible.

Preferably, it is provided that functional elements are integrated in the plastic formed part of the hybrid component. This is especially advantageous because in this way a multifunctionality of this specific partial area of the roofing material is achieved. In particular, it is provided that a functional element comprises a housing for a blocking element for blocking the door during a pyrolysis operation of an appliance configured as a cooking appliance. Additionally or alternatively, it may be provided that a functional element is a stop part of a door contact switch. In addition, it is provided that a functional element is additionally or alternatively an elastic snap hook for coupling the cover with another component of the door. In addition, it may be provided that a functional element is, additionally or alternatively, a dome for the transmission of force. Another possible configuration of the functional element may then be a locking installation to prevent the separation of a frontal system. especially from a front panel, from other door components. In an advantageous configuration, the metal of the hybrid component is intended to be a stainless steel, in particular a chromed steel 1.4016.

Advantageously, the cover is configured as bell type and has through holes for air circulation.

Preferably, it is expected that with respect to the place of application and the possible influence parameters especially temperature influences, a plastic, for example PBT or PET reinforced with glass fibers, is provided for a partial area of the roof. As metal, stainless steel is preferably provided. With respect to the functional elements, said weight holes may also be configured, especially with respect to the shape, number and position to avoid heat accumulation in the upper part of the cover towards the front panel and in the same way prevent turbulence. of air. In this way, the circulation for the ventilation of the door with several separate panels can be improved and selective cooling of the panels can be achieved locally.

In addition, vision inside the door through the cover is prevented.

On the other hand, the invention relates to an appliance, in particular a cooking appliance with a door according to the invention. The door is configured in context to close a housing space, in particular a cooking space.

Examples of embodiment of the invention are explained in detail below with the help of schematic drawings. In this case:

Figure 1 shows a perspective representation of an exemplary embodiment of an appliance according to the invention.

Figure 2 shows a perspective representation of an exemplary embodiment of a cover according to a front view.

Figure 3 shows the cover according to Figure 3 in a rear view.

Figure 4 shows a partial representation according to Figure 3.

Figure 5 shows a partial representation of a partial fragment of the cover according to Figure 2; Y

Figure 6 shows a representation of the longitudinal section of an embodiment of a door according to the invention in an upper area, in which a cover is arranged.

In the figures, the same or functionally equal elements are provided with the same reference signs. In figure 1 a household appliance is shown in perspective view, which is configured as a cooking appliance, especially as a cooking oven 1. The cooking oven 1 comprises a housing 2, in which a muffle 3 is arranged. muffle 3 delimits a cooking space 4, in which food products can be introduced for its preparation.

The cooking space 4 and especially the flask 3 are configured on the front side a loading opening, which can be closed by means of a door 5. The door 5 comprises in the exemplary embodiment at least one front panel 6, in which outer side 6a a door handle 7 is configured. The door 5 further comprises an inner panel, which extends parallel to the front panel 6 and when the door 5 is closed it is arranged next to the cooking space 4. Furthermore, between the front panel 6, which also represents the outer panel, and the inner panel 8 (Figure 6) are configured a first inner panel 9 and a second intermediate panel 10.

The cooking oven 1 further comprises exemplary cooking zones 11, 12, 13 and 14. In addition, in the same way only in an exemplary position and configuration, a control device 15 is configured with a display unit 16 and control elements 17 and 18.

The door 5 further comprises an upper screen or a cover 19, as shown in a perspective view in Figure 2. Through this slatted cover 19 at least some of the door panels are covered from above. The cover 19 is configured as a hybrid component of at least the plastic and metal materials. An example is shown in Figure 2, in which the cover 19 has a metal core piece 20, in particular stainless steel. The metal can also be chromed steel.

Passages 21, 22 and 23 are formed in the strip-shaped core part 20, through which air circulations can exit from the door 5, as also shown in Figure 6.

The cover 19 in its hybrid configuration further comprises a piece of plastic 24. This piece of plastic 24 comprises an elongated strip 25, at the opposite end of which one end is formed integrally of end pieces 26 and 27. These end flaps 26 and 27 also cover the core piece 20 at opposite ends, so that it is set in this respect.

It may be provided that the core piece 20 is surrounded by plastic injection. This can be done because the core piece 20 is inserted into an injection molding mold and surrounded by injection with the plastic in a specific manner of the room, so that the finished part is then according to Figure 2. In In particular, it is provided that the joint between the core piece 20 and the plastic piece 24 is configured in such a way that by virtue of the different longitudinal expansions in the case of a heat inlet, the joint is not detached, but maintained in a lasting way. To this end, so to speak, a loose bearing and a fixed bearing are configured such that the core piece 20 can be slid to some extent on the plastic piece 24 and is thus arranged so to speak floating there.

As can be seen, in addition, in figure 2, functional elements 29 are integrated in the plastic part 24. It is, on the one hand, a housing 28, in which a locking element for the door lock 5 fits during a pyrolysis operation of the cooking oven 1.

In addition, another functional element 29 is provided. This functional element forms a stop for a door contact switch. This functional element 29 is thus configured in the form of a prism and is configured on a chamfer flank 30 of the respective ends 26 and 27.

In addition, another functional element 31 is provided in the exemplary embodiment. This pin-type element, which is downwards, which narrows pointed towards its free end. Represents a locking facility. This prevents in this way a detachment of the front system, in particular from a front panel from the door 5. In addition, the plastic part 24 comprises other functional elements 32, which are configured at the respective ends 26 and 27 opposite each other and are they extend in the same way in the vertical direction downwards and, therefore, they extend in the negative-and-direction. These functional elements 32 represent a dome for a transmission of forces that appear.

In addition, another functional element 33 is integrated in the plastic part 24, which forms an elastic snap hook for coupling the cover 19 with another component of the door 5.

In figure 3 the cover 19 is shown in a rear view, instead in figure 2 it is shown in a front view. An enlarged representation of fragment I is shown in Figure 3 in Figure 3.

An enlarged representation of fragment II is shown in Figure 5 in Figure 2. The more detailed respective configurations of the different functional elements can be recognized, as they are integrated in the end flaps 26 and 27 of the plastic part 24. In this case, the respective conformations and positions are shown on the extreme flaps 26 and 27 as well as their mutual functional arrangement and their size relationships with each other.

Figure 6 shows a sectional representation of the door 5 in the plane-and-z and in this case the upper area of the door 5 is also shown.

As can be seen in Figures 2 to 5, the functional elements 33 are arranged on the outer sides of the end flaps 26 and 27 and are thus arranged on the outer surfaces away from the metal part 20, so that they are easily accessible to the control through a user and can be pressed. Moreover, they are arranged under the recesses 28, so that the locking of the locking element is not prevented either.

List of! reference signs

1 cooking oven

2 shells

3 Mufla

4 Cooking space

5 door

6 Front panel

7 Door handle

8 Interior panel

9 First intermediate panel

10 Second intermediate panel

11 Cooking zone

13 Cooking zone

14 Cooking zone

15 Control device

16 Representation unit

Control element Control element Cover

Core piece Step hole Step hole Step hole Plastic part Strip

Extreme hatch Extreme hatch Housing Functional element Beveled edge Functional element Functional elements Functional element Fragment

Fragment

Claims (8)

1. Door (5) for a household appliance (1), with at least one door panel (6, 8 to 10) of the plate type and with a slat-shaped cover (19), which covers the door panel &, 8 to 10) from above, at least by sections, and which is configured by at least two different materials, in which the cover (19) is configured as a hybrid component of at least two plastic and metal materials, characterized in that - the cover (19) has a metal core piece (20), which is surrounded by plastic injection at least by sections and is welded or inserted into the plastic or knurled or stamped, or - because the cover (19) has a metal core piece (20), which is detachably non-destructively connected with a configured plastic wrap part, in particular it is elastically fitted, in which the core part (20 ) is unit with the plastic in such a way that a relative movement is possible by virtue of different dilation of the material in the case of heat influence, in which the core piece (20) is connected to the plastic part by means of a loose bearing and a fixed bearing and is arranged floating, at least in sections, in the plastic. 2. Door (5) according to claim 1, characterized in that the plastic has at least two different types with respect to temperature resistance, and a first configured plastic zone of the hybrid component is configured of a plastic with a first Temperature resistance and a second configured plastic zone of the hybrid component is configured of a plastic with a second temperature resistance different from the first. 3. Door (5) according to one of the preceding claims, characterized in that a heat decoupling element is formed between the metal and the plastic. 4. Door (5) according to claim 3, characterized in that the heat decoupling element is made of glass or graduated silk or an elastomer. 5. Door (5) according to one of the preceding claims, characterized in that functional elements (28, 29, 31, 32, 33) are integrated in the configured plastic part of the hybrid component. 6. Door (5) according to claim 5, characterized in that a functional element (28) comprises a housing for a blocking element for blocking the door (5) during a pyrolysis operation of an appliance (1) configured as a cooking appliance and / or a functional element (29) is a stop for a door contact switch and / or a functional element (3) is an elastic snap hook for coupling the cover (19) with Another component of the door (5) and / or a functional element (32) is a dome for the transmission of force and / or a functional element (31) is a locking installation to prevent the detachment of a frontal system, especially of a front panel (6), of the door (5). 7. Door (5) according to one of the preceding claims, characterized in that the cover (19) is configured as bell type and has through holes (21,22, 23) for air circulation. 8. Home appliance, in particular cooking appliance, with a door (5) according to one of the preceding claims, which is configured to close a housing space (4) of the home appliance.