DE102016211580A1 - Haushaltsgargerät - Google Patents

Abstract

A household cooking appliance (1) has a cooking chamber (G) delimited by a cooking chamber wall (3), a steam generator arranged outside the cooking chamber (G) and a steam supply line (4) connecting the steam generator to the cooking chamber (G), which steam supply line (4) a steam supply pipe (7) connected to the steam generator and a transition piece (8) projecting through the cooking space wall (3) and fixed to the cooking space wall (3), which are connected to one another, wherein the steam supply pipe (7) and the transition piece (8) their connection with a spring element (9) are latched. The invention is particularly advantageously applicable to ovens with steam supply function, in particular with a microwave function and / or a pyrolysis function.

Description

The invention relates to a Haushaltsgargerät, comprising a cooking chamber delimited by a cooking chamber, a arranged outside the cooking steam generator and a steam generator with the cooking chamber connecting steam supply, which steam supply connected to the steam generator steam supply pipe and a projecting through the cooking chamber and fixed to the cooking chamber transition piece has, which are interconnected. The invention is particularly advantageously applicable to ovens with steam supply function, in particular with a microwave function and / or a pyrolysis function.

DE 10 2010 043 490 A1 discloses a Dampfgargerät, especially for the household, with a cooking chamber to which steam from a steam generator via a steam supply line can be fed. The flow area of the steam supply section is adjusted to the amount of steam delivered so that the steam flow rate is slow enough to drain or drain condensate droplets or runnels therein against the steam flow.

It is the object of the present invention to overcome the disadvantages of the prior art at least partially and in particular to provide a Haushaltsgargerät the type in question, the steam inlet is particularly inexpensive to manufacture and easy to install and which has a particularly low energy loss through heat dissipation through the steam inlet.

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 household cooking appliance having a cooking chamber delimited by a cooking space, a steam generator arranged outside the cooking space and a steam supply connecting the steam generator to the cooking space, which steam feed line is a pipe connected to the steam generator (hereinafter referred to as steam supply pipe without restricting the general public ") and a projecting through the cooking chamber and fixed to the cooking chamber component (hereinafter referred to as" transition piece "referred to without limitation to the general public), which are connected to each other, wherein the steam supply pipe and the transition piece are latched to its connection to a spring element.

This Haushaltsgargerät has the advantage that it requires only a few parts for connecting the steam supply pipe to the cooking chamber and therefore can be implemented inexpensively. In addition, the assembly can be easily implemented by the double locking of the spring element on the steam supply pipe and on the transition piece. In addition, a heat conduction via the spring element can be kept low, which enables a particularly low energy loss via the steam inlet.

That the steam supply pipe and the transition piece are locked to the spring element, in particular means that the steam supply pipe is locked to the spring element and that the transition piece is locked to the spring element. The spring element holds the steam supply pipe and the transition piece together. The spring element thus serves as a connecting element for connecting the steam supply pipe and the transition piece. The transition piece can also be referred to as Dampfauslassbuchse.

It is a development that the spring element is elastically deformed in its locked state with both components. It can thus exert an elastic restoring force for compressing the steam supply pipe and the transition piece. This in turn allows a particularly reliable vapor-tightness between these components or components. Alternatively, the spring element holds the steam supply pipe and the transition piece together effortlessly.

The cooking chamber is used for food treatment, in particular a heat treatment. The Haushaltsgargerät can bring in steam generated by the steam generator via the steam supply into the oven, z. B. for steam cooking and / or steam treatment without heat. The steam generator can be a boiler or a water heater.

The Haushaltsgargerät may have a furnace functionality, in particular an oven functionality. The cooking chamber can then also be referred to as a furnace room, and the cooking chamber wall as a furnace muffle. The Haushaltsgargerät may alternatively or additionally have a microwave functionality.

The Haushaltsgargerät may be a pyrolysis, are eliminated in the cooking space in the food residues, etc. in an independent pyrolysis by increased temperature (possibly up to 500 ° C). An inside of the cooking chamber wall can be catalytically coated.

The cooking chamber wall has a loading opening which can be closed by means of a door.

It is a development that the steam supply pipe and the transition piece are connected to each other vapor-tight. This prevents leakage of appreciable amounts of steam outside the cooking chamber.

It is an embodiment that the transition piece has a tubular portion or "pipe piece" which has at a first ("front") end portion a disk-like support portion for bearing on an inner side of the cooking chamber wall and at its other ("rear") end portion for connection is provided with the steam supply pipe and which pipe piece has at least one latching area for latching engagement of the spring element. This makes it possible to achieve a particularly inexpensive convertible, easy to install and highly dense transition from the steam supply line into the cooking chamber. In particular, the spring element can be easily attached to the pipe piece to secure it thereto.

The transition piece opens into the cooking chamber. The disc-like support region is located in the cooking chamber, while the pipe section protrudes through the cooking chamber wall and thus has at least one section outside the cooking chamber. The disc-like support area can also represent a widened foot of the pipe section. In particular, in this embodiment, the transition piece may also be referred to as a connecting piece or designed as a connecting piece.

It is a development which is advantageous for preventing a rotation of the transition piece against the cooking chamber wall, that a passage opening of the cooking chamber wall through which the transition piece passes has a non-circular shape, that is, a shape which is not circular. The passage opening may be, for example, angular, e.g. rectangular or hexagonal. The transition piece is in particular suitably shaped, so that only a small gap is present between the passage opening and the transition piece. In particular, the pipe section may have a corresponding thickening at its guided through the passage opening portion. This laterally thickened section can connect to the disk-like support region in the longitudinal extent of the pipe section.

It is further an embodiment that the steam supply pipe - in particular at its intended for connection to the transition piece end portion - has at least one locking portion for latching engagement of the spring element. Thus, the spring element can be easily attached to the steam supply pipe to attach it to it.

It is still an embodiment that the latching region has at least one laterally outwardly projecting projection or at least one recess. Thereby, an easily implementable engagement of the spring element is enabled, e.g. by engagement of a latching hook in the recess or by engaging behind the projection by means of a latching hook. The projection may be a rib, the recess may be a groove. It is a development that the projection is a laterally encircling rib or the recess is a laterally encircling annular groove. This gives the advantage that a rotational position of the transition piece is irrelevant.

It is also an embodiment that the spring element has a plurality of projecting in the direction of the transition piece first latching hook and a plurality of projecting in the direction of the steam supply pipe second latching hook. Such a spring element is particularly easy to manufacture and lock.

It is also an embodiment that the spring element by means of the first latching hooks is automatically inextricably latched to the transition piece and / or by means of the second latching hooks automatically unsolvable locked to the steam supply pipe. As a result, an assembly can be carried out particularly easily, because so the spring element holds securely after locking on the transition piece and a fitter can concentrate on the locking of the steam supply pipe with the spring element. In addition, the steam supply pipe after locking with the spring element can no longer detach from the transition piece, so that a reliable connection is provided. Under an automatically unsolvable locking can be understood in particular a locking, which is not automatically solved. If necessary, it can be releasable by manual actuation (for example bending out) of the catch hooks. In order to implement a self-releasable locking, a latching hook can e.g. have obliquely bent tabs, which can engage in the manner of a pawl or lock in a latching region of the steam supply pipe and / or in a latching region of the transition piece.

It is a development that the spring element by means of the first latching hook and / or the second latching hook is automatically releasably latched to the steam supply pipe. Thus, a separation between the steam supply pipe and the transition piece can be achieved by simply pulling apart under force application. In order to implement an automatically releasable locking, the latching hook can be used e.g. have a roof-like projection.

It is also an embodiment that the spring element has an annular region, attach to the first edge of the first latching hooks and attach to the second edge of the second latching hooks. This results in the advantage that the spring element can be pushed onto the steam supply pipe and / or on the transition piece or at least one of these two components can be inserted through the annular region. It is an advantageous particularly for this embodiment development that the spring element is a formed sheet metal part, so that it is particularly inexpensive to produce, for example, from a steel sheet, for example made of stainless steel or spring steel.

It is a further embodiment that the transition piece is fixed by means of a screw on the cooking chamber wall. As a result, a particularly secure and tight attachment of the transition piece to the cooking chamber wall can be achieved. Also, a screw mounting technology is easy to implement.

It is yet another embodiment that the pipe piece has an external thread on which a union nut is screwed so that it presses against an outer side of the cooking chamber wall. Thus, a particularly reliable and tight holding without tilting of the transition piece is achieved on the cooking chamber wall, since the union nut and the transition piece are pressed by pressing surface on the cooking chamber wall, from different sides. In this case, the union nut can be arranged on the outside of the cooking chamber wall and consequently press on an outer side of the cooking chamber wall, while the transition piece presses on an inner side of the cooking chamber wall. In particular, the transition piece can press on the inside of the cooking chamber wall by means of its disk-like support region. Another advantage of this embodiment is that a pressure on the cooking chamber wall is easily adjustable. Also, the use of the union nut assembly technology is particularly easy to implement.

It is also an embodiment that the transition piece is a Kaltfließpressteil. It may in particular consist of metal. This gives the advantage of a particularly high dimensional accuracy and surface quality of the transition piece. The transition piece may in particular be coated on its surface located in the cooking chamber with a thermally highly resistant layer, e.g. with a ceramic layer, an enamel layer, etc. This may e.g. Prevent damage during a pyrolysis process particularly reliable.

Alternatively, the transition piece may be made of ceramic. This has the advantage that it can be made thermally and chemically particularly resistant and particularly heat-insulating.

It is also an embodiment that between a inside of the cooking chamber wall and the transition piece, a circumferential first seal is present. Thus, leakage of vapor, heat, etc. from the cooking chamber through a through hole in the cooking chamber wall can be prevented particularly reliable.

It is a development that the first seal between the disc-like support region of the transition piece and the inside of the cooking chamber wall is located. The first seal can in particular be pressed in between the inside of the cooking chamber wall and the transition piece, in particular between the inside of the cooking chamber wall and the disk-like support region. The first seal may be an annular seal. In particular, the first seal is high temperature resistant (e.g., up to 500 ° C) to survive pyrolysis without damage. The first seal may be a ceramic seal.

It is also an embodiment that between the transition piece and the steam supply pipe, a second seal is present. As a result, an escape of steam outside the cooking chamber can be prevented particularly reliably. The second seal may be an annular seal, e.g. in the form of an O-ring.

It is a development that the steam supply pipe and the pipe section can be plugged together, which allows a mechanically particularly reliable and robust connection between them. In this case, the steam supply pipe may be inserted into the pipe section, or vice versa.

It is also an embodiment that the steam supply pipe is inserted into the pipe section of the transition piece, the steam supply pipe has at least one outwardly projecting projection (in particular a circumferential rib) as the latching region. The at least one projection may serve as a stop against a rear edge of the pipe section. So a particularly precise mating and compact connection can be achieved.

It is still an embodiment that the second seal between the rib and the rear edge of the pipe section is arranged, since it can be pressed in a compact manner and without further fasteners between the steam supply pipe and the pipe section, thereby enabling a particularly good tightness.

The object is also achieved by a method for connecting a steam supply pipe with a transition piece as described above, wherein the method comprises at least the following steps: insertion of the pipe section of the transition piece from the side of the cooking chamber through a through hole in the cooking chamber wall; Attaching the union nut to the pipe section from outside the cooking chamber and screwing with the external thread of the pipe section until the cooking chamber wall between the union nut and the disc-like bearing portion of the transition piece is kept under pressure; Attaching the spring element to the pipe section until it engages; and mating the steam supply pipe with the pipe section until the locking of the spring element with the steam supply pipe.

The method can be designed analogously to the Haushaltsgargerät and gives the same advantages.

Thus, additional steps for adding the first seal and / or the second seal may be provided. For example, the first seal can be placed on the disc-like support area before inserting the pipe section. Also, before the mating of the steam supply pipe with the pipe section, the second seal can be plugged onto the steam supply pipe or the pipe section.

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 in a view obliquely from the rear right a section of a Haushaltsgargeräts on an outside of a cooking chamber wall in the region of a steam supply line;

2 shows in a view obliquely from the front right another section of the Haushaltsgargeräts in the steam supply line;

3 shows in an oblique view from the front left an exploded view of the steam supply line;

4 shows in an oblique view from the right rear an exploded view of components of the steam supply line; and

5 shows in an oblique view, a spring element of the steam supply line.

1 shows in an oblique view a section of a Haushaltsgargeräts 1 on an outside 2 a cooking space wall 3 in the area of a steam supply line 4 , The cooking chamber wall 3 limited with its inside 5 a cooking space G (see 2 ). The steam supply 4 can be at a rear end area 6 be connected to a outside of the cooking chamber G arranged steam generator (o. Fig.) To direct steam generated by the steam generator D in the cooking chamber G. The household cooking appliance 1 can be designed as an oven, which additionally allows a steam supply and, if necessary, can also radiate microwaves in the cooking chamber G. Alternatively, the Haushaltsgargerät 1 a microwave oven with additional steam supply functionality.

The steam supply 4 has a steam supply pipe connected to the steam generator 7 and a through the cooking space wall 3 protruding and on the cooking chamber wall 3 fixed transition piece 8th on, which are connected to each other vapor-tight. The rear end area 6 the steam supply 4 So is by means of the steam supply pipe 7 provided while the transition piece 8th protrudes into the cooking chamber G and opens. The steam supply pipe 7 and the transition piece 8th are nested and their connection or attachment to each other with a spring element 9 locked. The transition piece 8th is by means of a on the outside 2 the cooking space wall 8th supporting union nut 10 on the cooking chamber wall 3 attached.

2 shows another section of the Haushaltsgargeräts in another oblique view 1 in the area of the steam supply line 4 , wherein several components are shown cut open. 3 shows in yet another oblique view an exploded view of the steam supply line 4 with an associated section of the cooking chamber wall 3 , 4 shows in yet another oblique view an exploded view of the steam supply line 4 without the transition piece 8th with an associated section of the cooking chamber wall 3 ,

The transition piece 8th has one as a piece of pipe 11 trained portion and a subsequent thereto at a first, front end portion portion in the form of a disc-like support area 12 on (each cut open). The disc-like support area 12 is inside the cooking space G and lies on the inside 5 the cooking space wall 3 on, and a through hole 13 surrounding all around. Between the disc-like support area 12 and the union nut 10 become the cooking chamber wall 3 and a first sealing ring 14 held under pressure to escape of fumes, etc. through the through hole 13 to prevent. The pipe piece 11 points to an outside of the cooking chamber G arranged external thread 15 on, on which the union nut 10 is screwed. The through hole 13 is hexagonal designed to rotate the transition piece 8th to prevent it. The pipe piece 11 is there thickened laterally hexagonal.

At its other, rear end 11a is the piece of pipe 11 for connection to the steam supply pipe 7 intended. A channel 16 of the pipe section 11 is at the rear end area 11a so extended that a front end area 7a of the steam supply pipe 7 can be put into it. At the front end area 7a of the steam supply pipe 7 this has outside a laterally circumferential rib 17 which can serve as a stop. Between the rib 17 and the rear end portion of the pipe section 11 - especially between a rear edge 11b of which - is located on the steam supply pipe 7 attached second sealing ring 18 , the outlet of the water vapor D through a gap between the steam supply pipe 7 and the pipe section 11 prevented.

5 shows the spring element 9 in an oblique view. The spring element has been produced as a stamped and bent part from a metal sheet and has - at the edge starting from a central annular region 19 - Three in the direction of the pipe section 11 protruding first latching hook 20 and three in the direction of the steam supply pipe 7 protruding second locking hooks 21 on. The locking hooks 20 and 21 each have an obliquely inwardly projecting tab 22 on.

By means of the tabs 22 can be by a Verrastvorgang a positive connection between the latching hook 20 and 21 and respective latching portions of the pipe section 11 or the steam supply pipe 7 to reach. And that can by attaching the spring element 9 with the locking hooks 20 ahead on the pipe section 11 be achieved that the tabs 22 in a latching area in the form of a circumferential annular groove 23 of the pipe section 11 intervene, as in 2 shown.

By - eg following - plugging in the steam supply pipe 7 in the pipe section 11 can the tabs 22 the locking hook 21 the rib 17 reach behind and reach there so a form fit. The locking hooks 20 and 21 Thus, by locking automatically unsolvable with the transition piece 8th or with the steam supply pipe 7 get connected. The rib 17 thus serves not only as a stop against the pipe section 11 but also as a rest area.

The steam supply pipe 7 , the feather part 9 and / or transition piece 8th can be made of metal, in particular stainless steel. For example, the transition piece 8th can be a cold extruded part.

For connecting the steam supply pipe 7 with the transition piece 8th At least the following steps can be carried out: Inserting the pipe section 11 from the side of the cooking space G through the through hole 13 in the cooking chamber wall 3 ; Attaching the union nut 10 on the pipe section 11 from outside the cooking space G and screwing with the external thread 15 of the pipe section 11 until the cooking space wall 3 between the union nut 10 and the disc-like support area 12 of the transition piece 8th is kept under pressure; Attaching the spring element 9 on the pipe section 11 until latching (by engagement of the locking hooks 20 in the ring groove 23 ); and mating the steam supply pipe 7 with the pipe section 11 until the latching of the spring element 9 with the steam supply pipe 7 (by grasping the rib behind 17 through the locking hooks 21 ).

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

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

 Haushaltsgargerät

2

 Outside of the cooking chamber wall

3

 cooking chamber

4

 steam supply

5

 Inside the cooking chamber wall

6

 Rear end region of the steam supply line

7

 Steam feed pipe

7a

 Front end of the steam supply pipe

8th

 Transition piece

9

 spring element

10

 Nut

11

 pipe section

11a

 rearward end portion of the pipe section

11b

 Rear edge of the pipe section

12

 Disc-shaped support area

13

 Through Hole

14

 First sealing ring

15

 external thread

16

 Channel of the pipe section

17

 rib

18

 Second sealing ring

19

 Annular region of the spring element

20

 First snap hook

21

 Second snap hook

22

 flap

23

 ring groove

D

 Steam

G

 oven

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 102010043490 A1 [0002]

Claims (14)

Household cooking appliance ( 1 ), comprising - one of a cooking chamber wall ( 3 ) limited cooking space (G), a outside of the cooking chamber (G) arranged steam generator and the steam generator with the cooking chamber (G) connecting steam supply line ( 4 ), - which steam supply ( 4 ) connected to the steam generator steam supply pipe ( 7 ) and a through the cooking space wall ( 3 ) protruding and on the cooking chamber wall ( 3 ) fixed transition piece ( 8th ), which are interconnected, characterized in that - the steam supply pipe ( 7 ) and the transition piece ( 8th ) to its connection with a spring element ( 9 ) are locked. Household cooking appliance ( 1 ) according to claim 1, characterized in that the transition piece ( 8th ) a piece of pipe ( 11 ), which at a first end region has a disk-like support region ( 12 ) for resting on an inner side ( 5 ) of the cooking space wall ( 3 ) and at its other end region for connection to the steam supply pipe ( 7 ) is provided and which pipe section ( 11 ) at least one latching area ( 23 ) has for latching engagement of the spring element. Household cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the steam supply pipe ( 7 ) at its for connection to the transition piece ( 8th ) end region at least one latching area ( 17 ) for latching engagement of the spring element ( 9 ) having. Household cooking appliance ( 1 ) according to one of claims 2 or 3, characterized in that at least one latching area ( 17 . 23 ) a laterally circumferential rib ( 17 ) or an annular groove ( 23 ) having. Household cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the spring element ( 9 ) several in the direction of the transition piece ( 8th ) projecting first latching hooks ( 20 ) and several in the direction of the steam supply pipe ( 7 ) projecting second locking hooks ( 21 ) having. Household cooking appliance ( 1 ) according to claim 5, characterized in that the spring element ( 9 ) by means of the first latching hooks ( 20 ) automatically insoluble with the transition piece ( 8th ) is latched and / or the spring element ( 9 ) by means of the second latching hooks ( 21 ) automatically insoluble with the steam supply pipe ( 7 ) is latched. Household cooking appliance ( 1 ) according to one of claims 5 to 6, characterized in that the spring element ( 9 ) an annular region ( 19 ), at the first edge of which the first catch hooks ( 20 ) and at the second edge of the second locking hooks ( 21 ). Household cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the transition piece ( 8th ) by means of a screw connection ( 10 ) on the cooking chamber wall ( 3 ) is attached. Household cooking appliance ( 1 ) according to claims 2 and 8, characterized in that the pipe section ( 11 ) an external thread ( 15 ), on which a union nut ( 10 ) is screwed on to an outside ( 2 ) of the cooking space wall ( 3 ) presses. Household cooking appliance ( 1 ) according to one of the preceding claims, characterized in that the transition piece ( 8th ) is a cold extruded part. Household cooking appliance ( 1 ) according to one of the preceding claims, characterized in that between an inner side ( 5 ) of the cooking space wall ( 3 ) and the transition piece ( 8th ) a circumferential first seal ( 14 ) is available. Household cooking appliance ( 1 ) according to one of the preceding claims, characterized in that between the transition piece ( 8th ) and the steam supply pipe ( 7 ) a second seal ( 18 ) is available. Household cooking appliance ( 1 ) according to claims 3 and 12, characterized in that - the steam supply pipe ( 7 ) in the pipe section ( 11 ) of the transitional piece ( 8th ), - the steam supply pipe ( 7 ) a circumferential rib ( 17 ) than the catch area, - the rib ( 17 ) as a stop against a rear edge ( 11a ) of the pipe section ( 11 ) and - the second seal ( 18 ) between the rib ( 17 ) and the back edge ( 11a ) of the pipe section ( 11 ) is arranged. Method for connecting a steam supply pipe ( 7 ) with a transition piece ( 8th ) of a household cooking appliance ( 1 ) according to claims 2, 5 and 8, wherein the method comprises at least the following steps: - insertion of the pipe section ( 11 ) of the transitional piece ( 8th ) from the side of the cooking chamber (G) through a through hole ( 13 ) in the cooking chamber wall ( 3 ), - attaching the union nut ( 10 ) on the pipe section ( 11 ) from outside the cooking chamber (G) and screwing with the external thread ( 15 ) of the pipe section ( 11 ), until the cooking chamber wall ( 3 ) between the union nut ( 10 ) and the disk-like support area ( 12 ) of the transitional piece ( 8th ) is kept under pressure, - attaching the spring element ( 9 ) on the pipe section ( 11 ) until latching, - mating the steam supply pipe ( 7 ) with the pipe section ( 11 ) until the latching of the spring element ( 9 ) with the steam supply pipe ( 7 ).

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