DE102014216548A1 - Door for a household appliance and designed as a hybrid component cover for at least one door glass and household appliance with such a door - Google Patents

Abstract

The invention relates to a door (5) for a domestic appliance (1), with at least one plate-like door pane (6, 8 to 10) and a strip-shaped cover (19) covering the door pane (6, 8 to 10) from above, at least in places , and which is formed of at least two different materials, wherein the cover (19) is formed as a hybrid component of at least the materials plastic and metal. The invention also relates to a household appliance (1) with a door (5).

Description

The invention relates to a door for a household appliance with at least one plate-like door glass and a strip-shaped cover, which covers the door pane from above at least partially, and which is formed from at least two different materials. Furthermore, the invention relates to a household appliance, in particular a cooking appliance, with such a door.

Such doors are from the DE 10 2006 042 177 A1 and the EP 2 416 072 A1 known.

These top covers of the door are subject to functionally high requirements and are also exposed to a wide variety of operating conditions, so that they have to endure, for example, many different temperature influences and moisture differences permanently.

It is an object of the present invention to provide a door for a household appliance and such a household appliance, in which or in which the cover the requirements imposed on it takes into account.

This object is achieved by a door and a household appliance according to the independent claims.

A door according to the invention for a domestic appliance comprises at least one plate-like door pane and a strip-shaped cover which covers the door pane at least in places from above. The cover is formed of at least two different materials. An essential idea of the invention is to be seen in that the cover is designed as a hybrid component of at least the materials plastic and metal. A significant advantage of the invention is the fact that the individual individual areas can be formed very specific material specific material by such a hybrid component. This has significant advantages in the design of very complex shapes of the individual parts of this cover from the different materials. Especially the specified materials plastic and metal are in this context in view of the then to be accepted requirements very individual to design and train. The cover as a whole can thus be made very individual and needs-based in terms of their use and their use material. In addition, just by such a hybrid component at the interfaces to the at least two materials plastic and metal create a mechanically stable connection, so that here too durable durability is achieved and durable high stresses can be maintained.

It is preferably provided that the cover has a core part or an inner part, which is formed of metal. This core part is at least partially encapsulated with the plastic. It can also be provided in this embodiment that different plastics are attached to different areas of the metal and in particular injection-molded, so that the advantages mentioned above stand out again. A very locally specified design of plastic materials on the core part is made possible.

In particular, it is provided in such an embodiment that the core part is brought as a metal insert in an injection molding device and is encapsulated with the plastic. In an advantageous manner, it is provided here that the connection between the metallic core part and the region of the cover made of plastic is designed so that a relative movement due to, in particular, different material expansion of the two materials is made possible under the influence of heat. Advantageously, it is provided here that the core part is connected by a floating bearing and a fixed bearing with the at least one plastic and at least partially quasi floating in the plastic is arranged. By such a particularly advantageous embodiment is then achieved that does not dissolve due to different linear expansion of both materials, a connection between the plastic and the metal. It is therefore provided in this preferred embodiment that the metal insert or the core part in the plastic part can slide to some extent.

In a further embodiment it is preferably provided that the cover has a core part made of metal, which is at least partially surrounded and welded with at least one plastic. This connection can be made for example by a heat source, by which at least one of the two materials is heated so that welding is possible. Again, it is preferably provided that the connection is designed so that a relative movement between the materials is made possible. Here, too, a movable bearing and a fixed bearing are thus provided in particular, during the operation of the household appliance, in particular a cooking appliance, and thus occurring heat input into the cover not an undefined curvature in the assembly by the different length expansions of the materials occur.

In a further advantageous embodiment, it is provided that the cover comprises a core part Has metal, which is non-destructively releasably connected to a trained plastic sheath part, in particular snapped or crimped. Here, too, it is then preferably provided that the core part is connected to the plastic in such a way that a relative movement due to different material expansion under the influence of heat is made possible. Accordingly, the embodiments also apply here as advantageous developments when a connection with a movable bearing and a fixed bearing is provided.

In particular, it is provided that in a further embodiment, the cover has a core part made of metal, which is glued to a plastic part formed envelope. Also, it is advantageous here if the thickness of the adhesive and thus the layer thickness and also in the material composition of the adhesive is chosen such that the different length expansions of the materials during operation of the household appliance allows a relative movement of the metal and the plastic, without the Adhesive connection is destroyed.

In a further advantageous embodiment, it is provided that the plastic has at least two different types with respect to the temperature resistance, and a first formed from plastic portion of the hybrid component made of a plastic having a first temperature resistance and a second made of plastic portion of the hybrid component a plastic is formed with a first different second temperature resistance. Thus it can be provided that at least a portion of the cover is formed of a high temperature resistant plastic. This is in particular that area which is exposed to high temperatures during operation of the domestic appliance, for example due to air currents or other factors. In particular, it is provided that with respect to the temperature in the operation of the household appliance further portion of the cover is formed of metal and a low in operation of the household appliance temperatures compared to the other temperatures exposed area is formed of a plastic with low temperature resistance.

It can be provided that the cover has a core part made of plastic, which is at least partially encapsulated with metal, in particular an IM (In-Mold) - or an IMD (In-Mold-Decoration) component is formed. In particular, in the case of components produced in such a specified manner, a foil, for example of stainless steel, is applied or back-injected onto the core part made of plastic. In this embodiment, a visible metallic surface is then produced, although the cover is not a solid mass component made of metal. However, a corresponding impression is conveyed by this.

It is preferably provided that a heat decoupling element is formed between the metal and the plastic. This may be, for example, a high-temperature-resistant plastic or a glass fiber seal or a Graphitzwischenlage or an elastomer. Preferably, it is provided that openings, for example, for carrying out air flows or slots in the core part, which is formed in particular of metal, were adapted to the muffle flange of the cooking appliance designed as a household appliance. This flange includes passages between the door and a suction channel. Preferably, a total cross section of the passages is formed with at least 2,000 mm ² . As a result, a corresponding air volume flow is achieved by the door through the metallic part of the cover and allows a corresponding extraction.

It is preferably provided that functional elements are integrated in the part of the hybrid component formed from plastic. This is particularly advantageous insofar as a multifunctionality of this material-specified portion of the cover is achieved. In particular, it is provided that a functional element comprises a receptacle for a locking element for locking the door in a pyrolysis operation of a household appliance designed as a cooking appliance. Additionally or instead, it can be provided that a functional element is a stop for a door contact switch. In addition, it is provided that a functional element in addition to or instead of a snap hook for coupling the cover with another component of the door. In addition, it can be provided that a functional element in addition to or instead of a dome for power transmission. Another possible embodiment of a functional element may then be a locking device for the dissolution prevention of a front system, in particular a windscreen, of other components of the door.

In an advantageous embodiment, it is provided that the metal of the hybrid component is a stainless steel, in particular a chromium steel 1.4016.

Advantageously, the cover is hood-like and has passage openings for air currents.

It is preferably provided that, with regard to the place of use and the possible influencing parameters, in particular temperature influences, a plastic, for example PBT or PET with glass fiber, is reinforced for a partial area of the cover. As metal is preferably stainless steel intended. With regard to the functional elements, the passage openings mentioned can also be designed in such a way, in particular in terms of shape, number and position, in order to prevent accumulation of heat in the upper part of the cover towards the front pane and also to prevent air turbulence. As a result, the circulation for ventilating the door can be improved with several separate panes and a very locally targeted cooling of the panes can be achieved.

In addition, the insight into the door interior is prevented by the cover.

Furthermore, the invention relates to a household appliance, in particular a cooking appliance, with a door according to the invention or an advantageous embodiment thereof. The door is in the context of closing a receiving space, in particular a cooking chamber formed.

Further features of the invention will become apparent from the claims, the figures and the description of the figures. The features and feature combinations 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 respectively specified combination but also in other combinations or in isolation, without the frame to leave the invention. Thus, embodiments of the invention are to be regarded as encompassed and disclosed, which are not explicitly shown and explained in the figures, however, emerge and can be produced by separated combinations of features from the embodiments explained.

Embodiments of the invention are explained in more detail below with reference to schematic drawings. Show it:

1 a perspective view of an embodiment of a household appliance according to the invention;

2 a perspective view of an embodiment of a cover according to a front view;

3 the cover according to 3 in a rear view;

4 a partial view of the view according to 3 ;

5 a partial view of a partial section of the cover according to 2 ; and

6 a longitudinal sectional view of an embodiment of a door according to the invention in an upper region in which a cover is arranged.

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

In 1 is shown in a perspective view of a household appliance, which serves as a cooking appliance, in particular as an oven 1 , is trained. The oven 1 includes a housing 2 in which a muffle 3 is arranged. The muffle 3 limits a cooking space 4 into which food can be incorporated for preparation.

The cooking space 4 and especially the muffle 3 are formed on the front side with a feed opening, which passes through a door 5 is closable. The door 5 includes in the embodiment at least one windscreen 6 , on the outside 6a a door handle 7 is trained. The door 5 also includes an inner pane parallel to the windscreen 6 extends and with the door closed 5 the cooking space 4 is arranged closer. In addition, there are between the windscreen 6 , which also represents the outer pane, and the inner pane 8th ( 6 ) a first intermediate disc 9 and a second washer 10 educated.

The oven 1 also includes cooking zones as an example 11 . 12 . 13 and 14 , In addition, in position and design also merely an example of an operating device 15 with a display unit 16 and controls 17 and 18 educated.

The door 5 also includes a top panel and a top cover 19 as seen in a perspective view 2 is shown. Through this strip-shaped cover 19 At least some of the door panels are covered from above. The cover 19 is designed as a hybrid component of at least the materials plastic and metal. In 2 Here is an example shown in which the cover 19 a core part 20 made of metal, in particular stainless steel. The metal can also be chrome steel.

In the strip-shaped core part 20 are through holes 21 . 22 and 23 formed by which air currents from the door 5 as it is in 6 is shown, can escape.

The cover 19 in its hybrid embodiment also includes a plastic part 24 , This plastic part 24 includes an elongated strip 25 , at the opposite end end caps 26 and 27 are integrally formed. These end caps 26 and 27 also cover the core part 20 at the opposite ends, so that it is enclosed in this regard.

It can be provided that the core part 20 is encapsulated by the plastic. This can be done in that the core part 20 is placed in an injection mold and molded with the plastic site-specific, so that then the finished part according to 2 arises. In particular, it is provided that the connection between the core part 20 and the plastic part 24 is designed so that due to the different length expansions at a heat input, the connection is not solved, but permanently maintained. For this purpose, a lot and a fixed bearing are formed, so that the core part 20 in the plastic part 24 to a certain extent can slide and thus is virtually floating in it.

As well as in 2 It can be seen in the plastic part 24 functional elements 29 integrated. This is a recording 28 , in which a locking element for locking the door 5 in a pyrolysis operation of the oven 1 intervenes.

In addition, another functional element 29 intended. This functional element forms a stop for a door contact switch. This functional element 29 is thus prismatic and formed on a sloping edge 30 the respective ends 26 and 27 educated.

In addition, in the embodiment, another functional element 31 intended. This downward, pin-like element, which tapers tip-like to its free end, represents a locking device. This thus prevents a release of the front system, in particular a windshield of the door 5 ,

In addition, the plastic part includes 24 further functional elements 32 at the opposite ends 26 and 27 are formed and also extend in the vertical direction downwards and thus extend in the negative y-direction. These functional elements 32 represent a dome for a transmission of occurring forces.

In addition, to the plastic part 24 another functional element 33 integrated, which has a snap hook for coupling the cover 19 with another component of the door 5 forms.

In 3 is the cover 19 shown in a rear view, whereas in 2 is shown in a front view.

In 4 is an enlarged view of the detail I in 3 shown.

In 5 is an enlarged view of the detail II in 2 shown. The respective more detailed embodiments of the various functional elements, as in the end caps 26 and 27 the plastic part 24 are integrated, can be seen. There are the respective shapes and positions in the end caps 26 and 27 as well as their positional arrangement to each other and their proportions to each other shown.

In 6 is a sectional view of the door 5 shown in the yz plane while the top of the door 5 shown.

As in the 2 to 5 can be seen, are the functional elements 33 on the outsides of the end caps 26 and 27 and thus to the metal part 20 arranged facing away from outer surfaces, so that they are easily accessible for operation by a user and can be pressed. In addition, they are below the wells 28 arranged so that the engagement of the locking element is not hindered.

LIST OF REFERENCE NUMBERS

1

 oven

2

 casing

3

 muffle

4

 oven

5

 door

6

 windscreen

7

 door handle

8th

 inner pane

9

 first intermediate disc

10

 second washer

11

 cooking zone

12

 cooking zone

13

 cooking zone

14

 cooking zone

15

 operating device

16

 display unit

17

 operating element

18

 operating element

19

 cover

20

 core part

21

 Through opening

22

 Through opening

23

 Through opening

24

 Plastic part

25

 strip

26

 endcap

27

 endcap

28

 admission

29

 functional element

30

 sloping flank

31

 functional element

32

 functional elements

33

 functional element

I

 neckline

II

 neckline

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102006042177 A1 [0002]
• EP 2416072 A1 [0002]

Claims (15)

Door ( 5 ) for a household appliance ( 1 ), with at least one plate-like door pane ( 6 . 8th to 10 ) and a strip-shaped cover ( 19 ), which the door glass ( 6 . 8th to 10 ) from above at least partially covers, and which is formed from at least two different materials, characterized in that the cover ( 19 ) is formed as a hybrid component of at least the materials plastic and metal. Door ( 5 ) according to claim 1, characterized in that the cover ( 19 ) a core part ( 20 ) Made of metal, which is encapsulated with plastic at least partially. Door ( 5 ) according to claim 1, characterized in that the cover ( 19 ) a core part ( 20 ) Made of metal, which is at least partially surrounded and welded plastic or inserted in the plastic and crimped or embossed. Door ( 5 ) according to claim 1, characterized in that the cover ( 19 ) a core part ( 20 ) Made of metal, which is non-destructively releasably connected to a plastic formed Umhüllungsteil, in particular snapped. Door ( 5 ) according to claim 1, characterized in that the cover ( 19 ) a core part ( 20 ) made of metal, which is glued to a plastic formed from a wrapping part. Door ( 5 ) according to one of claims 2 to 5, characterized in that core part ( 19 ) Is connected to the plastic such that a relative movement due to different material expansion is possible under the influence of heat. Door ( 5 ) according to claim 6, characterized in that the core part ( 20 ) Is connected by a movable bearing and a fixed bearing with the plastic and at least partially floating in the plastic is arranged. Door ( 5 ) according to any one of the preceding claims, characterized in that the plastic has at least two different types with respect to the temperature resistance, and a first formed from plastic portion of the hybrid component made of a plastic having a first temperature resistance and a second plastic formed portion of the hybrid Component is formed of a plastic with a first different second temperature resistance. Door ( 5 ) according to claim 1, characterized in that the cover ( 19 ) a core part ( 20 ) made of plastic, which is at least partially encapsulated with metal, in particular an IM (In-Mold) - or an IMD (In-Mold-Decoration) component is formed. Door ( 5 ) according to one of the preceding claims, characterized in that between the metal and the plastic, a heat decoupling element is formed. Door ( 5 ) according to claim 10, characterized in that the heat decoupling element of glass fiber or graphite or an elastomer. Door ( 5 ) according to any one of the preceding claims, characterized in that in the part formed of plastic of the hybrid component functional elements ( 28 . 29 . 31 . 32 . 33 ) are integrated. Door ( 5 ) according to claim 12, characterized in that a functional element ( 28 ) a receptacle for a locking element for locking the door ( 5 ) in a pyrolysis operation of a household appliance designed as a cooking appliance ( 1 ) and / or a functional element ( 29 ) is a stop for a door contact switch and / or a functional element ( 33 ) a snap hook for coupling the cover ( 19 ) with another component of the door ( 5 ) and / or a functional element ( 32 ) is a power transmission dome and / or a functional element ( 31 ) a locking device for the dissolution prevention of a front system, in particular a windscreen ( 6 ), the door ( 5 ) is. Door ( 5 ) according to one of the preceding claims, characterized in that the cover ( 19 ) is hood-like and passageways ( 21 . 22 . 23 ) for air currents. Household appliance, in particular cooking appliance, with a door ( 5 ) according to one of the preceding claims, which is used to close a receiving space ( 4 ) of the household appliance is formed.

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