EP2574851B1 - Cooking device door and cooking device - Google Patents

Description

The present invention relates to a door for closing at least one cooking chamber opening of a cooking appliance. The door comprises at least two discs which are arranged on a receiving device such that a ventilation channel is formed between them. The receiving device is associated with a cooling device. Furthermore, the invention relates to a cooking appliance with a cooking chamber closing door.

In the field of cooking appliances, the development of the most energy-efficient and therefore ecological appliances is being pushed further and further. Particular attention is paid to a particularly effective insulation and good thermal performance.

Here, the isolation of a heated cooking chamber plays an important role in two ways. On the one hand a particularly good energy efficiency is to be achieved by the most effective possible insulation of the cooking space by as little heat as possible is lost to the outside. On the other hand, the externally accessible surfaces and parts of a cooking appliance must be so well shielded from the heat of the oven that there is no risk of injury. The door of a cooking appliance is often a particular development challenge. Most cooking appliance doors are equipped with a viewing window. This allows a user to look into the oven without opening the door, which would lose a lot of heat energy. However, the effective insulation of the viewing window is more difficult than the isolation of, for example, a side wall of the cooking appliance.

Sufficient cooling is often achieved by a multi-pane structure of the door, in which arise through the arrangement of several panes gaps that can be traversed with air. However, one problem is the most commonly used frame parts of the door, which are arranged between the outer and the inner disc. These can act as thermal bridge and transfer the heat from the cooking chamber from the inner pane via the frame to the outer pane.

Thus, in the frame construction, which carries the various panes of the door, uncomfortably high and in the worst case dangerous temperatures may arise. This is particularly the case when the cooking space is heated to very high temperatures, as is conceivable, for example, in pyrolysis.

From the DE 102 26 657 A1 For example, a cooking appliance is known having a cooking chamber door comprising an outer pane and an inner pane with a space extending between the panes. The DE 102 26 657 A1 discloses further that on the inside of the disc or on a frame part, a heat accumulator is mounted to perform a partial cooling of the grip portion of the disc.

It is therefore an object of the present invention to provide a cooking appliance and a door for a cooking appliance, in which a more effective cooling of the entire outer pane of the cooking chamber door is achieved.

This object is achieved by a cooking appliance with the features of claim 2 and with a door for a cooking appliance with the features of claim 1. Preferred embodiments are subject of the dependent claims. Further advantages and features will become apparent from the general description and the description of the embodiments.

The cooking appliance according to the invention comprises at least one cooking chamber and a door closing the cooking chamber. The door comprises at least one inner and at least one outer pane. When the door is closed, the inner pane faces the cooking chamber. The outer pane shows in the closed state of the door to the outside. Furthermore, at least one receiving device for arranging the at least one inner and the at least one outer disk is provided. In this case, the discs are arranged such that at least one ventilation channel is formed between the discs. The receiving device is associated with at least one cooling device which extends into the ventilation channel.

The cooling device is in an effective for the heat conduction contact with the receiving device to dissipate heat from the receiving device.

As a cooking appliance, for example, cooking appliances such as an oven, a stove, a combi steamer, a steamer, a microwave or combinations of various cooking appliances are considered. Such ausgestaltetes cooking appliance offers many advantages. A significant advantage is that a significant portion of the heat of the receiving device can be dissipated by the cooling device. The receiving device may be an unfavorable thermal bridge between the inner and the outer disc. By arranging a heat sink in the ventilation channel, which is still in effective for the heat conduction contact with the receiving device, heat from the receiving device can be removed easily and effectively ,

The transferred from the receiving device to the cooling device heat can be dissipated by the cooler air flow in the ventilation duct effectively. This ensures a particularly effective cooling, also in the region of the door frame or the receiving device.

It may be provided in other advantageous embodiments, more than an inner and an outer disc for the door assembly. Then, at least one middle disc is preferably provided between the at least one inner and the at least one outer disc, such that at least one ventilation channel is formed between the respective adjacent discs. This allows a particularly good cooling effect of the door can be achieved.

When a multi-disc structure is provided with a plurality of ventilation channels between the outer, the inner and at least one central disc, in preferred embodiments, a cooling device is provided at least in the ventilation channel formed with the outer disc.

It is further preferred that the receiving device consists at least partially of profile parts, which are provided in particular hollow. It is particularly preferred to use profiles of aluminum and / or of sheet metal and / or of another metal and / or of another heat-resistant material, which may also be enamelled. In this case, for example, a left and a right door pillar in the form of a profile part or consisting of one or more aluminum profiles may be provided, on which the panes of the cooking chamber door are accommodated.

In advantageous embodiments, the cooling device is accommodated on a profile part. As a result, a particularly good heat dissipation can be achieved.

In order to minimize the heat transfer from the inner pane to the outer pane via the profile parts as much as possible, in particularly preferred embodiments, at least one profile part may comprise at least one slot which extends substantially vertically when the door is closed.

In this case, for example, a slot may extend over the entire length of a profile, but it is also possible for a plurality of shorter slots to be provided in a profile, which may also be arranged offset relative to one another. As a result, the heat transfer from the cooking chamber to the outside over the profile parts is at least partially interrupted or limited.

Slots in the ventilation channel facing away from the side or in the sides where the discs are added, may be advantageous in certain embodiments. But it is particularly advantageous if at least one slot is provided on the side facing the ventilation channel at least one profile part. As a result, under certain circumstances, even the cooler air flowing through the ventilation channel can penetrate into the slot and thus also cause additional cooling.

It is preferred that the cooling device and the discs are at least partially spaced from one another. As a result, a particularly effective cooling effect can be achieved since no new thermal bridge can arise between the cooling device and the disks.

Often, only a slight distance is provided between the cooling device and the disk, and it is therefore advantageous for the cooling device to be supported against the outer disk, wherein, in particular, a resilient support is preferred. As a result, it can be achieved that the heat sink comes into contact with, for example, an inaccurate assembly or other influences with a pane, as a result of which the cooling capacity would be reduced.

In order to achieve the largest possible cooling surface of the cooling device, a cooling device is provided in particularly preferred embodiments, which provides a large surface area available. For this purpose, a cooling device which is substantially V-shaped is preferably suitable. Of course, other shapes can be used to make sense and expedient to increase the surface of the heat sink. In this case, the cooling device can also be shaped substantially wave-shaped.

It is further preferred that the cooling device consists at least partially of a thermally conductive material. Thereby, the removal of heat from the receiving device can be improved. In particular, materials with a high thermal conductivity or with a high heat transfer coefficient are preferred.

So that the external appearance of the cooking appliance is not changed by the use of cooling devices in the ventilation channel of a pane, it is also preferred that the cooling device does not project into the viewing area of the door. This can be achieved, for example, by arranging the cooling devices behind a darkened region of the pane. It is also advantageous that the cooling devices exploit the available space as well as possible in order to achieve the most effective cooling performance.

The door according to the invention for closing at least one cooking chamber opening of a cooking appliance comprises at least one inner pane, which faces the cooking space when the door is closed, and at least one outer pane which faces outwards in the closed state of the door. Furthermore, at least one receiving device is provided for arranging the at least one inner and the at least one outer disk, such that at least one ventilation channel is formed between the disks. The receiving device is associated with at least one cooling device which extends into the ventilation channel.

The cooling device is in an effective for the heat conduction contact with the receiving device to dissipate heat from the receiving device.

The cooking chamber door according to the invention also offers many advantages. A significant advantage is that the effect of the resulting between an inner and an outer disc through the receiving device thermal bridge can be effectively mitigated by simple means. As a result, effective cooling is achieved, in particular even at very high cooking chamber temperatures ensures the oven door, as the heat can be easily dissipated through the cooling device.

The door according to the invention can be advantageously developed according to all the previously described embodiments.

Further advantages and features of the present invention will become apparent from the embodiments, which are explained below with reference to the accompanying figures.

Fig. 1:

eine stark schematische Darstellung eines erfindungsgemäßen Gargerätes, das als Herd ausgeführt ist, in einer leicht perspektivischen Ansicht;

Fig. 2:

eine stark schematische Darstellung einer Tür in einer geschnitten Ansicht von oben;

Fig. 3:

eine stark schematische Darstellung der Tür gemäß Figur 2 in einer geschnitten Ansicht aus dem Belüftungskanal;

Fig. 4:

eine stark schematisch dargestellte Weiterbildung der Tür gemäß Figur 2 in einer geschnitten Ansicht von oben;

Fig. 5:

eine stark schematische Darstellung der Tür gemäß Figur 4 in einer geschnitten Ansicht aus dem Belüftungskanal; und

Fig. 6:

eine stark schematische Darstellung eines weiteren Ausführungsbeispiels einer Tür in einer geschnitten Ansicht von oben.

In the figures show:

Fig. 1:

a highly schematic representation of a cooking appliance according to the invention, which is designed as a stove, in a slightly perspective view;

Fig. 2:

a highly schematic representation of a door in a sectional view from above;

3:

a highly schematic representation of the door according to FIG. 2 in a sectional view from the ventilation duct;

4:

a highly schematically illustrated development of the door according to FIG. 2 in a cutaway view from above;

Fig. 5:

a highly schematic representation of the door according to FIG. 4 in a sectional view from the ventilation duct; and

Fig. 6:

a highly schematic representation of another embodiment of a door in a sectional view from above.

In FIG. 1 is an inventive cooking appliance 1 is shown in a strong perspective view, which is designed here as hearth 100. The hearth 100 has a housing 17, on which a cooking chamber 2 is provided, which can be closed by a door 3. When the door 3 is open, a food can be introduced into the cooking chamber 2.

On the stove 100, a hob 18 is arranged, which is divided into several cooking zones 19. The desired settings for a cooking process on the hob 18 or in the cooking chamber 2 can be made via some controls 20 on a control panel 21. Behind the control panel 21, a control device 22 is provided.

The control panel 21 further includes a display device 23, which is designed here as a display 24. Various parameters of the cooking appliance 1 can be displayed on the display 24, and adjustments can also be made via further operating elements 25. Among other things, on the display 24, for example, the current cooking space temperature can be output. A clock is integrated into the display device 23.

The cooking chamber 2 of the hearth 100 shown here can be heated by various heating methods. For example, the use of top and / or bottom heat, a grill function or a recirculation mode can be selected. Depending on the type of cooking appliance 1, other heating methods such as microwave operation or heating via a gas or steam operation are possible.

Through a viewing window 26 in the door 3 you can look in the cooking chamber 2. There you can see on the left side of the cooking chamber 2, a support receptacle 27, which is designed here as a receiving grid 28. In the cooking levels 29 different carriers, such as a baking sheet, can be inserted.

In FIG. 2 the door 3 is shown very schematically in a sectional view from above. Here you can see left and right each receiving device 6, which is provided by an aluminum profile 12 each.

At the profile parts 11, an inner disc 4 and an outer disc 5 are fixed by means of a temperature-resistant silicone adhesive 30 in the embodiment shown here. The inner pane 4 is in the closed cooking chamber door 3 facing the cooking chamber 2 and the outer pane 5 faces outward. Other fastening methods can be used expediently and expediently to arrange the discs on the receiving device 6.

In the area of the outer pane 5, a cooling device 8, which is here a cooling body 31 and consists of a thermally conductive material 14, is respectively assigned to the left and the right aluminum profile 12. Also, a different positioning of the cooling device 8 along the profile parts 11 may be advantageous. The profile parts may also partially or entirely consist of sheet metal or other metal in other embodiments, which may also be provided enamelled. Other refractory materials may also be used.

However, the heat sinks are expediently arranged at a distance from the pane 5, so that a free region 32 remains between the pane 5 and the heat sink 31, through which air can flow.

So that the cooling devices 8 can not accidentally rest against the pane 5, small support devices 34 are provided as spacers 33, which protrude from the cooling device 8 as a small web 36 here. These support the cooling device 8 against the outer disc 5, whereby a resilient support is advantageous.

FIG. 3 shows the door 3 according to FIG. 2 in a side view cut through the middle of the open door. The line AA shows the cutting position of the previously in FIG. 2 described representation.

The heat sink 31 is designed in this embodiment over the entire length of the aluminum profile 12 and is supported at three points 33 against the outer pane 5.

A development of the previously described door 3 is in the FIGS. 4 and 5 shown. In this case, a slot 13 is provided in the aluminum profiles 12 on the ventilation channel 7 side facing. This slot 13 interrupts the heat transfer from the inner disk 4 to the outer disk 5 and thus improves the cooling of the outer disk 5 in the region of the receiving device 6.

The length of the cooling devices 8 is chosen in the embodiment shown here so that the heat sink 31 does not protrude into the field of view of the disk 5. The disk 5 here comprises a darkening 36 as an ornament, behind which the heat sinks 31 are not visible from the outside. The inner disk 4 may have such a darkening 36 in other embodiments.

In FIG. 5 is the sectional plane of the in FIG. 4 shown door 3 drawn with the line BB. Furthermore, it can be seen that the slot 13 extends over almost the entire length of the aluminum profile 12. This causes the constriction of the cooling or heat-conducting body 8.

There are also other embodiments of the slot 13 conceivable and advantageous. For example, a plurality of shorter slots 13 may be provided, which may for example also be implemented offset and overlapping. Also slots 13 on other sides of the receiving device 6 may be advantageous.

In FIG. 5 is still shown that the heat sink 31 do not have to extend over the entire length of the aluminum profile 12. There are two short cooling devices 8 are provided, each supported by a support means 34 against the disc 5. These are arranged in the region of the slot ends 37, where most of the heat has to be dissipated.

FIG. 6 shows a further embodiment with a door 3, which in addition to the inner disc 4 and the outer disc 5 has two central discs 9, 10. This creates between the outer disc 5 and a middle disc 9, a ventilation channel 7. Between the two middle discs 9, 10 creates a ventilation channel 38 and the ventilation channel 39 is formed between the inner disc 4 and the middle disc 10.

In the embodiment shown here, a slot 13 is provided in the profile parts 11, which are also provided here as aluminum support 12. In the area of the receiving devices 6, where the outer pane 5 is arranged by means of a heat-resistant silicone adhesive 30, heat sinks 31 are provided on each side. These are configured in the door 3 shown here as V-shaped sheets, which have very small spacers 33 which support the cooling means 8 against the outer disk 5. This ensures that a defined free area 32 remains between the heat sinks 31 and the outer pane 5, through which cool air can flow in order to cool the cooling devices 8 from both sides. Other shapes of the cooling device 8 may be useful and appropriate. Any design that increases the surface area of the cooling device can be used to advantage.

In a construction of the door with more than two discs 4, 5, 9, 10 and thus with a plurality of ventilation channels 7, 38, 39 and heat sink 31 may be provided in each ventilation channel in contact with the receiving means 6 in advantageous developments. LIST OF REFERENCE NUMBERS 1 Cooking appliance 26 window 2 oven 27 support receptacle 3 door 28 side racks 4 inner disc 29 Garebene 5 outer disc 30 silicone adhesive 6 recording device 31 heatsink 7 ventilation duct 32 free area 8th cooling device 33 spacer 9 medium slices 34 support means 10 middle disc 35 web 11 profile part 36 blackout 12 aluminum profile 37 Slashing 13 slot 38 ventilation duct 14 thermally conductive material 39 ventilation duct 15 viewing area 17 casing 18 hob 19 cooking zone 20 operating element 21 control panel 22 control device 23 display 24 display 25 operating element

Claims (13)

1. Door (3), suitable for closing at least one cooking chamber opening (16) of a cooking appliance (1), comprising at least one inner pane (4), which faces the cooking chamber (2) when the door (3) is closed, and comprising at least one outer pane (5), which faces outwards when the door (3) is closed, and comprising at least one receiving means (6) for arranging the at least one inner (4) and the at least one outer pane (5) in such a way that at least one ventilation channel (7) is formed between the panes (4, 5),
   characterised in that
   a cooling device (8), which extends into the ventilation channel (7), is associated with the receiving means (6), the cooling device (8) being in contact with the receiving means (8) in a manner that is effective for conducting heat in order to conduct heat away from the receiving means (6).
2. Cooking appliance (1) comprising at least one heatable cooking chamber (2) and at least one door (3) according to claim 1 that closes the cooking chamber (2),
   the door (3) comprising at least one inner pane (4), which faces the cooking chamber (2) when the door (3) is closed, and at least one outer pane (5), which faces outwards when the door (3) is closed, and at least one receiving means (6) being provided for arranging the at least one inner (4) and the at least one outer pane (5) such that at least one ventilation channel (7) is formed between the panes (4, 5),
   characterised in that
   at least one cooling device (8), which extends into the ventilation channel (7), is associated with the receiving means (6), the cooling device (8) being in contact with the receiving means (8) in a manner that is effective for conducting heat in order to conduct heat away from the receiving means (6).
3. Cooking appliance (1) according to claim 2, characterised in that at least one central pane (9, 10) is provided between the at least one inner (4) and the at least one outer pane (5) such that at least one ventilation channel (7) is formed between the respectively adjacent panes.
4. Cooking appliance (1) according to the preceding claim, characterised in that a cooling device (8) is provided at least in the ventilation channel (7) formed by the outer pane (5).
5. Cooking appliance (1) according to any of the preceding claims, characterised in that the receiving means (6) consists at least in part of profile parts (11), in particular of aluminium profiles (12) or profiles made of sheet metal or another metal.
6. Cooking appliance (1) according to the preceding claim, characterised in that the cooling device (8) is received on a profile part (11).
7. Cooking appliance (1) according to at least one of claim 5 or claim 6, characterised in that at least one profile part (11) comprises at least one slot (13) which extends substantially vertically when the door (3) is closed.
8. Cooking appliance (1) according to the preceding claim, characterised in that at least one slot (13) is provided on the side of at least one profile part (11) which faces the ventilation channel (7).
9. Cooking appliance (1) according to any of the preceding claims, characterised in that the cooling device (8) and the panes (4, 5, 9, 10) are provided so as to be spaced apart from one another at least in part.
10. Cooking appliance (1) according to any of the preceding claims, characterised in that the cooling device (8) is braced against the outer pane (5), in particular resiliently.
11. Cooking appliance (1) according to any of the preceding claims, characterised in that the cooling device (8) is formed in a manner that results in a large surface area of the cooling device (8).
12. Cooking appliance (1) according to any of the preceding claims, characterised in that the cooling device (8) consists at least in part of a heat-conducting material (14).
13. Cooking appliance (1) according to any of the preceding claims, characterised in that the cooling device (8) does not protrude into the viewing region (15) in the door.

Images