DE102017200208A1 - Double cooker and method for cooling a double cooker - Google Patents

Abstract

A Doppelgargerät (4) has a lower cooking appliance (G1) and an upper cooking appliance arranged above (G2), which are housed in a common housing (3), and a first fan (9) and a second fan (15), wherein by means of the first fan (9) via a inside (10) of the at least one housing wall (2) flowing fresh air (K) is sucked and by means of the second fan (15) via an outside (1) of the at least one housing wall (2) flowing fresh air (K) is sucked. A method is used to cool at least one housing wall (2) of a double cooking appliance (4) with a lower cooking appliance (G1) and an upper cooking appliance (G2), wherein the at least one housing wall (10) is heated by means of the first fan (9). 2) flowing fresh air (K) is sucked in and by means of the second fan (15) via an outside (1) of the at least one housing wall (1) flowing fresh air (K) is sucked.

Description

The invention relates to a Doppelgargerät, comprising a lower cooking appliance and an upper cooking appliance arranged above, which are housed in a common housing, a first fan and a second fan. The invention also relates to a method for cooling at least one housing wall of a Doppelgargeräts with a lower cooking appliance and an upper cooking appliance. The invention is particularly advantageously applicable to built-in Doppelgargeräte, of which at least the lower cooking appliance is pyrolysefähig.

In Doppelgargeräten the type in question, the first fan for sucking and subsequent removal of air from a ventilated cooking chamber door of the lower cooking appliance is used. The second fan is typically used to cool appliance electronics housed in an area above the upper cooking appliance. A negative pressure generated by the second fan can also be used to suck cool outside air from bottom to top along an inside of the housing, whereby the housing is cooled on the inside. However, a cooling of the housing walls is often not sufficient in particular when the lower cooking appliance is pyrolysetauglich. This is particularly problematic with built-in appliances in which a surrounding furniture could possibly be damaged by the heat generated by the Doppelgargerät.

DE 10 2010 062 147 A1 discloses a domestic appliance having an outer housing having a side wall and an air duct formed on the side wall, the air duct being internal to the housing, and a first boundary wall of the air duct through the inside of the side wall and a second boundary wall releasably attached to the housing arranged channel part is formed.

DE 10 2014 217 639 A1 and DE 10 2014 217 641 A1 disclose a cooking appliance with a housing, which has outer walls and in which a muffle is arranged, which delimits a cooking space with muffle walls, wherein at least one outer wall in an adjacent muffle wall adjacent surface area has a muffle wall facing formed indentation, wherein in the indentation an embossing field is formed with a plurality of separate flat embossing elements. Both documents also reveal an arrangement.

EP 1 431 670 A2 discloses that in order to effectively and inexpensively cool a housing for a cooking appliance, a housing for a cooking appliance with a housing wall is proposed in which in an outer surface of the housing wall at least one air guide element for guiding the air along the outer surface is arranged.

It is the object of the present invention to overcome the disadvantages of the prior art, at least in part, and in particular to provide a simple and inexpensive possibility for improved cooling of housing walls of a Doppelgargeräts, in particular with pyrolysis function.

This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

The object is achieved by a Doppelgargerät, comprising a lower cooking appliance and an upper cooking appliance arranged above it, which are housed in a common housing, a first fan and a second fan, wherein by means of the first fan via a inside of the at least one housing wall flowing fresh air sucked is and by means of the second fan via an outside of the at least one housing wall flowing fresh air can be sucked.

This Doppelgargerät has the advantage that by additional use of two fans for air cooling at least one housing wall, a cooling effect on this housing wall can be amplified. This additional cooling effect is inexpensive with only simple to implement modifications to existing equipment feasible.

The lower cooking appliance and the upper cooking appliance may be the same or different cooking appliances. e.g. For example, the lower cooking appliance may be an oven while the upper cooking appliance is a steam cooker and / or a microwave oven. Also, the lower cooking appliance and the upper cooking appliance may be different high ovens.

That by means of the first fan via a inside of the at least one housing wall flowing fresh air can be sucked, may in particular include that by means of the first fan, the fresh air is practically "only" on the inside sucked and not on the outside. That by means of the second fan via a outside of the at least one housing wall flowing fresh air can be sucked, may analogously include that by means of the second fan, the fresh air is virtually "only" via the outside ansaugbar and not on the inside. Under fresh air can be understood in particular non-heated air, in particular ambient air.

It is advantageous for a particularly large-scale cooling effect development that fresh air can be sucked in the region of a bottom of the housing. This can be implemented by openings in the ground, by near-ground openings in the side walls of the housing, etc.

It is an embodiment that the at least one housing wall comprises a left-side housing wall ("left side wall") and a right-side housing wall ("right side wall"). These housing walls can be particularly warm and also be placed particularly close to adjacent devices, walls, etc. Therefore, their cooling by both sides flowing over fresh air is particularly advantageous.

It is still an embodiment that the housing walls have elongated, vertically oriented air ducts. This gives the advantage that the fresh air can flow over the housing walls over a particularly wide area.

It is still an embodiment that at least one housing wall has at least one air duct (in particular a plurality of air ducts), which is formed by means of at least one vertically oriented embossing (in particular by means of a plurality of such embossments). Embossings are advantageously particularly easily introduced into a housing wall, e.g. in present as sheet metal housing walls. However, additionally or alternatively, even differently shaped air ducts may be used, e.g. Luftleitkanäle formed by Luftleitrippen.

It is a further development that the at least one embossing extends over at least 80% of a height of an associated housing wall. So a particularly large-scale cooling can be achieved. In other words, at least 80% of the height of the associated housing wall is provided with at least one embossment.

It is a development that the embossments are a plurality of mutually parallel embossments. In particular, raised and recessed embossings can be arranged laterally alternately. Raised imprints can direct airflows to the outside of the housing wall, and recessed embossments can direct airflows to the inside of the housing wall, or vice versa.

It is a development that at least one air duct runs in an embossing or at least one embossing forms an air duct. It is still a development that at least one air duct runs in a space between two adjacent imprints or the space forms an air duct.

It is still an embodiment that the first fan is arranged on a rear fan and the second fan is disposed on an upper side of the upper cooking appliance. This allows a particularly effective ventilation effect in a particularly simple to implement arrangement.

It is a development that the first fan is a cross-flow fan. It is still a development that the second fan is an axial flow fan.

The rear side may be a rear side of a rear wall of the housing, in particular an outer side thereof. The back can also be a back of a cooking appliance.

It is still an embodiment that by means of the first fan air flowing only over a lower portion of the at least one housing wall is sucked. As a result, a particularly strong cooling effect is generated at the lower portion. A lower portion of a housing wall can be understood in particular to be that portion which is opposite the lower cooking appliance or at the level of the lower cooking appliance. This embodiment is particularly advantageous when the lower cooking appliance can heat up considerably, e.g. during a pyrolysis.

Alternatively, by means of the first fan also air can be sucked over an upper portion of the at least one housing wall flowing air. Thus, the upper portion of the outside can be cooled by an additional air flow. An upper portion of a housing wall can be understood in particular to be that portion which opposes the upper cooking appliance or is at the level of the upper cooking appliance. In this case, advantageously, a volume flow of air drawn in along the lower portion is appreciably larger than a volume of air drawn in along the upper portion. For example, a ratio of the air volume flow drawn in via the upper partial area to the air volume flow taken in via the lower partial area can be 1:10, 1: 5; 1: 4, 1: 3, 1: 2 or at least more than 1: 1.

It is still an embodiment that by means of the first fan additionally air can be sucked, which emerges from a ventilated door of the lower cooking appliance. As a result, the door can be ventilated and / or the exhaust air can be effectively dissipated. For example, the door may have air outlet slots provided at its upper edge for exiting the air. It is an alternative or additional development that air can be sucked in additionally by means of the first fan, which exits from a ventilated door of the upper cooking appliance.

It is a development that the air outlet slots are directed into a space between the lower cooking appliance and the upper cooking appliance or border on such a gap. This allows a particularly effective and space-saving extraction of the exhaust air from the door through the gap.

It is still an embodiment that between the lower cooking appliance and the upper cooking appliance an air guide cover is present, which leads from a front edge of the housing to the first fan. This air guide cover can cover in particular the lower cooking appliance, in particular cover virtually airtight. This embodiment has the advantage that a suction power of the second fan for sucking fresh air from below over the inside of the housing and possibly exhaust air of the door is particularly high, because unwanted or parasitic air currents, especially from an upper portion of the housing, significantly reduced can be.

It is a development that the second fan is arranged in the region of the intermediate space between the lower cooking appliance and the upper cooking appliance. Thus, particularly short air paths can be achieved from the lower portion of the housing walls and possibly the door to the second fan, which helps to maintain a high suction power.

It is still an embodiment that the lower cooking appliance and / or the upper cooking appliance is a pyrolysefähiges device. Such a pyrolysefähiges device can be particularly effective and externally cooled without expensive accessories.

It is still an embodiment that the Doppelgargerät is a built-in device for installation in a piece of furniture. An outer side of the housing can then be arranged adjacent to a furniture wall. The outside of the housing may have a distance to the furniture wall, in particular a small distance of one to two millimeters. Alternatively, the double cooker can be a stand-alone unit. An outer side of the housing may then be arranged adjacent to a body (outer shell) of the cooking appliance.

In general, air ducts may be formed on the outside of the housing in that recesses open to the outside are covered by a furniture wall or a body wall. The cover does not need to be lift-tight. Such depressions can be achieved, for example, by covering an embossment stamped inwards (inwardly recessed) and / or by covering a space between two embossments embossed outwards (raised).

Air ducts on the inside of the housing may be formed by covering inwardly open recesses by thermal insulation (e.g., a heat insulating panel). The cover does not need to be lift-tight. Such depressions can be achieved, for example, by covering an embossment embossed on the outside (embossed) and / or by covering a gap between two embossments embossed on the inside (recessed).

The object is also achieved by a system of furniture, in particular kitchen furniture, and built-in built-Doppelgargerät.

The object is also achieved by a method for cooling at least one housing wall of a Doppelgargeräts with a lower cooking appliance and an upper cooking appliance, wherein by means of the first fan via an inner side of the at least one housing wall flowing air is sucked and by means of the second fan via an outside of the at least sucking air flowing through a housing wall. The method can be designed analogously to the Doppelgargerät and has the same advantages.

Thus, it is an embodiment that by means of the first fan over the lower cooking appliance corresponding height of the side walls flowing air is sucked in and sucked by the second fan over a lower cooking appliance and the upper cooking appliance corresponding height of the side walls flowing air.

It is still an embodiment that by means of the first fan additionally exiting from a door of the lower cooking appliance exhaust air is sucked through a gap between the two cooking appliances.

• 1 zeigt in Schrägansicht eine Außenseite einer Seitenwand eines Gehäuses eines Einbau-Doppelgargeräts;
• 2 zeigt in einer Seitenansicht das Einbau-Doppelgargerät mit für eine Innenseite eingezeichneten Luftströmungen der Seitenwand;
• 3 zeigt in einer Ansicht von schräg oben einen Ausschnitt auf ein unteres Gargerät des Einbau-Doppelgargeräts mit umgebendem Gehäuse, Luftabdeckhaube und zweitem Lüfter; und
• 4 zeigt in einer Seitenansicht das Einbau-Doppelgargerät mit für eine Außenseite eingezeichneten Luftströmungen der Seitenwand.

The above-described characteristics, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following schematic description of an embodiment which will be described in detail in conjunction with the drawings.

• 1 shows an oblique view of an outside of a side wall of a housing of a built-in Doppelgargeräts;
• 2 shows a side view of the built-in Doppelgargerät with marked for an inner side air flows of the side wall;
• 3 shows in a view obliquely from above a section on a lower cooking appliance of Built-in double cooker with surrounding casing, air cover and second fan; and
• 4 shows a side view of the built-in Doppelgargerät with drawn for an outside air flows of the side wall.

1 shows in an oblique view an outside 1 a (in frontal view) right side wall 2 a housing 3 a built-in double cooker 4 , The built-in Doppelgargerät 4 is intended for installation in a kitchen furniture (not shown).

The side wall 2 has a lower portion 5 for side cover of a lower cooking appliance G1 (please refer 2 ) and an upper portion 6 for the lateral cover of an upper cooking appliance arranged above it G2 (please refer 2 ) on.

The side wall 2 has "inner" air ducts in the form of vertically formed, mutually spaced parallel imprints 7 on. The imprints 7 are imprinted on the outside or raised. The side wall 2 also has "outer" air ducts in the form of imprints 7 laterally limited vertically aligned spaces 17 on. The imprints 7 are imprinted on the outside or raised

A left side wall (not shown) may be shaped analogously, in particular at least approximately mirror-inverted.

2 shows a side view of the built-in Doppelgargerät 4 with for an inside of the side wall 2 drawn flow directions L1 cool ambient air K , The ambient air K is by means of a first fan in the form of a cross-flow fan 9 front in the area of a floor 8th of the housing 2 sucked. It then flows in the imprints 7 on an inside 10 of the housing 2 up, up to one in 3 shown gap 11 , There is the ambient air K by means of a horizontally extending Luftleithaube 12 horizontally backwards in the direction of the crossflow fan 9 diverted. The air duct 12 extends virtually over an entire depth and width of the gap 11 , in particular from a front edge of the housing 3 to the cross flow fan 9 ,

Consequently, therefore, by means of the cross-flow fan 9 over an inside 10 the side wall 2 flowing fresh air K sucked, but only on the lower cooking appliance G1 corresponding lower subarea 5 , Through the cross-flow fan 9 is this sucked ambient air K to the rear out of the case 3 issued.

The cross flow fan 9 is for creating short airways at a rear of the built-in double cooker 4 Arranged at the level of the gap, and although he is here at the Luftleithaube 12 attached.

The imprints 7 are covered on the inside by a heat insulating layer (not shown), so that the air ducts are surrounded by the embossings 7 and the heat insulating layer are limited. The heat insulating layer does not need airtight on the embossing 7 to rest, but may be spaced therefrom, for example, with gaps.

If a front cooking appliance door 13 of the lower cooking appliance G1 is ventilated and at its upper edge air outlet openings 14 can, also from the air outlet openings 13 escaping air (exhaust air B) by means of the cross-flow fan 9 be sucked. The exhaust air B is under the Luftleithaube 12 through the gap 11 sucked from the front to the back, as in 2 indicated. Such a variant is particularly advantageous when the lower cooking appliance G1 is a pyrolysefähiges cooking appliance.

The built-in double cooker 4 also has a second fan in the form of a on top of the upper cooking appliance G1 arranged axial fans 15 on. The axial fan 15 contributes to the production of an inside air flow on the side walls 2 not or not noticeable at.

In one variant, it may be in the upper part 6 the side wall 2 noticeable, but compared to the lower part 5 low air currents in the local sections of the imprints 7 come. Their flow directions L2 point against the flow directions L1 from top to bottom. In particular, air may be from an area above the upper cooking appliance G2 in the gap 11 be sucked.

4 shows in one too 2 analog representation of the built-in Doppelgargerät 4 with for the outside 1 drawn air currents L3 cool ambient air K on the side wall 2 , The location of the fan 9 . 15 is only hinted at here. The cross flow fan 9 is from a back cover 16 covered. The outside 1 is covered by a furniture wall or a device body (not shown).

The ambient air K is by means of the axial fan 15 front and back at ground level 8th of the housing 2 sucked, in a space between the outside and the furniture. This ambient air K is directed upwards in vertically aligned air ducts. The air ducts according to intervals 17 between the imprints 7 or a coinage 7 and a page boundary 18 the side wall 2 , The interspaces 17 are also covered by the furniture, etc., possibly with gaps.

The ambient air K flows in the form of vertical air currents L3 on the outside 1 the side wall 2 along. At an upper edge of the upper section 6 or even above the upper part 6 the side wall 2 there is an air passage opening 19 through which this ambient air K in the interior of the case 2 enters and from there to the axial fan 15 flows. The air passage opening 19 is here formed in several parts with trapezoidal portions. The air currents L3 so flow virtually over an entire height of the lower portion 5 and the upper part 6 and cool them.

Of course, the present invention is not limited to the embodiment shown.

So the first fan does not need a cross-flow fan 9 to be. Also, the second fan 15 does not need to be an axial fan. The number of imprints is basically arbitrary. The embossing need not be aligned vertically. The gaps 17 between the imprints can themselves be imprints again, especially in one of the imprints 7 Opposite direction embossed imprints.

Generally, "on", "an", etc. may be taken to mean a singular or a plurality, in particular in the sense of "at least one" or "one or more" etc., unless this is explicitly excluded, e.g. by the expression "exactly one", etc.

Also, a number may include exactly the specified number as well as a usual tolerance range, as long as this is not explicitly excluded.

LIST OF REFERENCE NUMBERS

1

outside

2

Side wall

3

casing

4

Built-Doppelgargerät

5

Lower part of the side wall

6

Upper part of the side wall

7

embossing

8th

Bottom of the case

9

Cross-flow fan

10

Inside of the housing

11

gap

12

airguide

13

cooking appliance

14

Air outlet openings

15

Axial

16

cover

17

interspaces

18

page limit

19

Air passage opening

G1

Lower cooking appliance

G2

Upper cooking appliance

K

ambient air

L1

flow direction

L2

flow direction

L3

flow direction

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 102010062147 A1 [0003]
• DE 102014217639 A1 [0004]
• DE 102014217641 A1 [0004]
• EP 1431670 A2

Claims (12)

Doppelgargerät (4), comprising - a lower cooking appliance (G1) and an upper cooking appliance arranged above (G2), which are housed in a common housing (3), and - a first fan (9) and a second fan (15), characterized in that - by means of the first fan (9) via an inner side (10) of the at least one housing wall (2) flowing fresh air (K) is sucked and - by means of the second fan (15) via an outer side (1) of the at least one Housing wall (2) flowing fresh air (K) is sucked. Double cooker (4) after Claim 1 , characterized in that the at least one housing wall (2) comprises a left-side housing wall and a right-hand housing wall. Doppelgargerät (4) according to any one of the preceding claims, characterized in that at least one housing wall (2) at least one by means of at least one vertically oriented embossment (7) formed Luftleitkanal (7, 17). Doppelgargerät (4) according to one of the preceding claims, characterized in that the first fan (9) is arranged on a rear side and the second fan (15) on an upper side of the upper cooking appliance (G2) is arranged. Doppelgargerät (4) according to one of the preceding claims, characterized in that by means of the first fan (9) only over a lower portion (5) of the at least one housing wall (2) flowing fresh air (K) is sucked. Doppelgargerät (4) according to any one of the preceding claims, characterized in that by means of the first fan (9) in addition exhaust air (B) is sucked, which emerges from a ventilated door (13) of the lower cooking appliance (G1). Doppelgargerät (4) after one of the Claims 5 or 6 , characterized in that between the lower cooking appliance (G1) and the upper cooking appliance (G2) an air guide (12) is provided, which extends from a front edge of the housing (3) to the first fan (9). Doppelgargerät (4) according to one of the preceding claims, characterized in that the lower cooking appliance (G1) and / or the upper cooking appliance (G2) is a pyrolysefähiges device. Doppelgargerät (4) according to one of the preceding claims, characterized in that the Doppelgargerät (4) is a built-in device for installation in a piece of furniture. Method for cooling at least one housing wall (2) of a double cooking appliance (4) with a lower cooking appliance (G1) and an upper cooking appliance (G2), wherein - By means of the first fan (9) via an inner side (10) of the at least one housing wall (2) flowing fresh air (K) is sucked and - By means of the second fan (15) via an outside (1) of the at least one housing wall (1) flowing fresh air (K) is sucked. Method according to Claim 11 , wherein - by means of the first fan (9) via a the lower cooking appliance (G1) corresponding height of the side walls (2) flowing fresh air (K) is sucked and - by means of the second fan (15) via the lower cooking appliance (G1) and the upper cooking appliance (G2) corresponding height of the side walls (2) flowing fresh air (K) is sucked. Method according to Claim 11 , wherein by means of the second fan additionally from a door (13) of the lower cooking appliance (G1) exiting exhaust air is sucked through an intermediate space (11) between the two cooking appliances (G1, G2).

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