DE102020202503A1 - Domestic steamer and method for operating a domestic steamer - Google Patents

Abstract

A domestic steam cooker (14) has a cooking space (16), a steam generator (19) arranged outside it for generating wet steam (N) and at least one superheater module (11) connected to the steam generator via at least one wet steam feed line (20) for Heating the wet steam to superheated steam (SHS) and outputting the superheated steam into the cooking chamber, the superheater module having a housing (12) with a plate-shaped basic shape which is arranged completely within the cooking chamber and in which there are accommodated: a steam duct connected to the wet steam supply line (10), a heating device (7) for heating the wet steam to superheated steam, a fanlessly connected steam outlet device (25) on the outlet side to the steam duct with at least one steam outlet opening (9) directed into the cooking chamber for the superheated steam, the housing having a first flat side (3) at least in an area covering the heating device (7) close to an ob is arranged outside the cooking chamber wall (15, 16a) present on the floor and steam outlet openings (9) are arranged on the second flat side (8) of the housing.

Description

The invention relates to a household steam cooker, comprising a cooking space provided with a loading opening, a steam generator arranged outside the cooking space for generating wet steam and at least one superheater device connected to the steam generator via at least one wet steam feed line for heating the wet steam to superheated steam and outputting the superheated steam in the oven. The invention also relates to a method for operating such a domestic steam cooker, wherein wet steam is generated by means of the steam generator, the wet steam is passed to the superheater device, is converted into superheated steam by means of the superheater device and the superheated steam is subsequently introduced into the cooking chamber. The invention is particularly advantageously applicable to baking ovens with a steam treatment function.

US 10,429,082 B2 discloses a cooking appliance with a housing that accommodates a cooking space in which the food to be cooked can be arranged. The housing also surrounds a water tank; a superheated steam generating device connected to the water tank; an SHS generator that heats hot steam into superheated steam; a fan that introduces the superheated steam into the cooking chamber; and a steam discharge section for the superheated steam. The superheated steam generating device comprises a first electrical heater and a first housing that accommodates the first electrical heater. A water level in the first housing corresponds to a water level in the water tank. The SHS generating device includes a second electric heater and a second housing that houses the second electric heater. At least part of the second housing is located within the cooking space.

EP 1 729 065 A1 and EP 1 757 861 A1 disclose a household steam cooker, comprising a cooking chamber provided with a loading opening, a steam generator arranged outside the cooking chamber for generating wet steam and a superheating device with a steam inlet for the wet steam, a heating device for heating the wet steam to superheated steam and at least one steam outlet opening for superheated steam . The overheating device is formed by means of a recess in the ceiling of the cooking space wall and is separated from the rest of the cooking space by a partition plate having the steam outlet openings. The heating device is located in the sub-space separated by the partition plate.

EP 1 628 079 A1 reveals a similar to EP 1 729 065 A1 Built-up household steam cooker in which the steam is additionally conducted from the sub-space containing the heating device for heating the wet steam via pipes to other cooking space walls.

EP 1 515 093 A2 , EP 1 514 474 A1 and EP 1 517 092 A1 each disclose a household steam cooker which has a combined steam generator and superheater arranged outside the cooking chamber, with superheated steam being introduced into the cooking chamber from the side through steam outlet openings.

EP 1 514 475 B1 discloses a domestic steam cooker which has a combined steam generator and superheater arranged outside the cooking space, the superheated steam being introduced into the cooking space on different sides by means of shut-off tubular feed lines.

EP 1 517 095 A2 a household steam cooker which has a combined steam generator and superheater arranged outside the cooking space, the superheated steam being introduced into a box attached to the wall of the cooking space and further reaching the rest of the cooking space through steam outlet openings in the box.

EP 1 628 078 A1 and EP 1 628 079 A1 each also show a household steam cooker which has a steam generator and superheating component arranged outside the cooking chamber, the superheated steam being introduced into the cooking chamber at the rear via a nozzle. In the cooking space there is a baffle which covers the nozzle opening at a distance and prevents direct steaming of the food with the superheated steam.

WO 2007/069855 A1 discloses an apparatus for generating superheated steam from wet steam.

EP 2 314 925 A1 and EP 2 322 860 A1 discloses a domestic steam cooking appliance, comprising a cooking space provided with a loading opening, a steam generator arranged outside the cooking space for generating wet steam and a superheating device arranged outside the cooking space for heating the wet steam to superheated steam. The superheated steam is let into the side of the cooking space.

EP 2 330 353 A1 discloses a household steam cooker which has a cooking space provided with a loading opening, a steam generator arranged outside the cooking space for generating wet steam and a heating device for heating the wet steam to superheated steam, the superheater being located in the cooking space, namely within a circulating air duct through which the wet steam mixed with air is conveyed from the cooking space to the heating device.

EP 2 503 236 A1 also discloses a household steam cooker, comprising a cooking chamber provided with a loading opening, a steam generator arranged outside the cooking chamber for generating wet steam and a superheating device arranged outside the cooking chamber for heating the wet steam to superheated steam. The superheated steam is let into the side of the cooking space.

EP 0 335 796 A1 discloses a domestic steam cooker, comprising a cooking space provided with a loading opening, a steam generator arranged outside the cooking space for generating wet steam and a superheating device formed on an outside of the cooking space for heating the wet steam to superheated steam.

EP 856704 B1 discloses a domestic steam cooking appliance, comprising a cooking space provided with a loading opening and a device arranged outside the cooking space for generating superheated steam which is subsequently let into the cooking space.

U.S. 4,851,644 A1 discloses a domestic steam cooking appliance, comprising a cooking space provided with a loading opening and a device arranged outside the cooking space for generating wet steam which is passed over heating elements of an annular heating element to generate superheated steam inside the cooking space.

US 7 418 960 B2 discloses a household steam cooker which has a cooking chamber provided with a loading opening, a steam generator arranged outside the cooking chamber for generating wet steam and a device arranged outside the cooking chamber for generating superheated steam from the wet steam.

US 7 915 568 B2 discloses a household microwave appliance which has a cooking chamber provided with a loading opening, a steam generator arranged partially inside the cooking chamber for generating wet steam and a device arranged outside the cooking chamber for generating superheated steam from the wet steam.

JP 2007 020612 A discloses a domestic steam cooking appliance, comprising a cooking space provided with a loading opening and a device arranged outside the cooking space for generating wet steam which is passed over top and / or bottom heating elements to generate superheated steam inside the cooking space.

JP 2004 301354 A also discloses a household microwave appliance which has a cooking chamber provided with a loading opening, a steam generator arranged partially inside the cooking chamber for generating wet steam and a device arranged outside the cooking chamber for generating superheated steam from the wet steam.

It is the object of the present invention to at least partially overcome the disadvantages of the prior art and in particular to provide a particularly easy to implement and energetically favorable possibility of treating food by means of superheated steam.

This object is achieved according to the features of the independent claims. Advantageous embodiments are the subject matter of the dependent claims, the description and the drawings.

• - einen mit einer Beschickungsöffnung versehen Garraum,
• - mindestens einen außerhalb des Garraums angeordneten Dampferzeuger zur Erzeugung von Nassdampf und
• - mindestens ein mit dem Dampferzeuger über mindestens eine Nassdampf-Zuleitung verbundenes Überhitzermodul zum Erhitzen des Nassdampfs zu überhitztem Dampf und Ausgeben des überhitztem Dampfs in den Garraum,
• - wobei das Überhitzermodul ein Gehäuse mit plattenförmiger Grundform aufweist, in dem mindestens untergebracht sind:
• - mindestens ein eingangsseitig an die Nassdampf-Zuleitung angeschlossener Dampfkanal,
• - eine Heizvorrichtung zum Erhitzen des in dem Dampfkanal befindlichen Nassdampfs zu überhitztem Dampf,
• - mindestens eine ausgangsseitig an den mindestens einen Dampfkanal lüfterlos angeschlossene Dampfauslasseinrichtung mit mindestens einer in den Garraum gerichteten Dampfauslassöffnung für den überhitztem Dampf,

wobei

• - das Gehäuse vollständig innerhalb des Garraums angeordnet ist,
• - das Gehäuse mit einer ersten Flachseite seiner beiden Flachseiten zumindest an einem die Heizvorrichtung überdeckenden Bereich nah an einer oberhalb eines Bodens vorhandenen Garraumwandung angeordnet ist und

wobei

• - Dampfauslassöffnungen an der anderen, zweiten Flachseite des Gehäuses angeordnet sind.

The object is achieved by a household steamer, having

• - a cooking space provided with a loading opening,
• - At least one steam generator arranged outside the cooking chamber for generating wet steam and
• - At least one superheater module connected to the steam generator via at least one wet steam feed line for heating the wet steam to superheated steam and for outputting the superheated steam into the cooking space,
• - wherein the superheater module has a housing with a plate-shaped basic shape, in which at least:
• - at least one steam duct connected on the inlet side to the wet steam supply line,
• - a heating device for heating the wet steam in the steam duct to superheated steam,
• - At least one steam outlet device, connected on the outlet side to the at least one steam duct without a fan, with at least one steam outlet opening directed into the cooking space for the superheated steam,

whereby

• - the housing is arranged completely within the cooking space,
• the housing is arranged with a first flat side of its two flat sides at least in an area covering the heating device close to a cooking space wall above a base and

whereby

• - Steam outlet openings are arranged on the other, second flat side of the housing.

This domestic steam cooker has the advantage that the wall of the cooking space only needs to be adapted slightly to accommodate and connect the superheater module, e.g. by providing brackets for the superheater module and / or feed line openings.

In addition, the superheater module can advantageously be prefabricated in a particularly simple and inexpensive manner outside of the cooking space and then installed as an independent component in the domestic steam cooker. The module can also have at least one electrical supply line to the heating device, one or more wet steam connections, etc. A wet steam connection can be designed as a tubular connector which can be connected, for example, to a hose attached to the steam outlet of the steam generator.

In addition, since the superheater module nestles close to the cooking chamber wall and can be made very thin due to its plate shape, only a small amount of usable space is required within the cooking chamber for its arrangement, and the food to be cooked is practically not impaired or influenced by the presence of the superheater module.

Due to the proximity to the cooking chamber wall without contacting the cooking chamber wall over a large area, the advantage is also achieved that there is a thermally insulating layer of air between the housing and the cooking chamber wall, which avoids undesirable heat transfer through contact heat conduction between the housing and the cooking chamber wall. This in turn advantageously reduces heat losses and thermal stress on the cooking chamber wall and the components behind it (e.g. electronics).

Furthermore, the advantage is achieved that the food to be treated can be arranged particularly close to the at least one steam outlet opening, as a result of which heat loss from the superheated steam until it comes into contact with the food is particularly low. This in turn makes it possible to keep the energy consumption for generating the superheated steam particularly low.

Another advantage is that the escaping superheated steam can be directed through the at least one steam outlet opening in a targeted manner to a predetermined area of the cooking space, e.g. as a steam jet. This results in the further advantage that, compared to an untargeted filling of the cooking space with superheated steam, only little steam is required to steam-treat the food, whereby the heating power for generating the superheated steam can be kept low. In addition, this prevents a steam jet with a high steam temperature (especially with Tshs ≥ 300 ° C) from hitting the wall of the cooking space, the door, seals, etc., which avoids the need to adapt these components to such high steam temperatures, which saves considerable costs. A steam jet can be generated because heated wet steam expands in the steam channel and therefore comes under (possibly only slight) overpressure there. In particular in the case of narrow steam outlet openings, the superheated steam will then exit with a noticeable flow velocity under a certain preferred or flow direction. However, the cooking space itself does not need to be under overpressure, which keeps its structure inexpensive. The flow speed can, for example, be in a range between 10 km / h and 100 km / h, possibly even higher.

In the case of the present household steam cooker, in particular, wet steam that is not or not only in the cooking space is further heated to superheated steam, but rather already superheated steam is introduced into the cooking space.

The fact that the at least one steam outlet opening is fluidically connected downstream of the heatable steam duct or follows it is advantageously achieved that the superheated steam exiting through the at least one steam outlet opening has passed through the entire length of the steam duct and thus at least approximately the same steam temperature at all steam outlet openings Tshs having.

Providing the housing has the advantage that the superheater module is particularly easy to handle, e.g. during assembly. In addition, the steam channel and the heating device are protected, e.g. against mechanical stress, fumes, etc. Yet another advantage is that the housing can serve as a wall of at least one section of the steam channel in a further development. The housing is an independent, possibly multi-part, component.

The domestic steamer can be an independent steamer or a combination steamer, for example an oven with steamer functionality, a microwave appliance with steamer functionality, an oven with microwave and steamer functionality, etc. The household steamer can also be or be in the form of a drawer . The domestic steamer can be a floor-standing device or a built-in device.

The loading opening can be closed, in particular steam-tight, by means of a cooking chamber door. The loading opening can be a front loading opening.

The cooking space is delimited by a cooking space wall (sometimes also referred to as a muffle or oven pipe), in the area of the loading opening by the cooking space door.

The steam generator is used to bring water to the boil and thus generate saturated steam ("wet steam"). The wet steam has a temperature Tn which corresponds at least approximately to the boiling temperature Ts (Tn ≤ Ts, with typically Ts approx. 100 ° C, depending on the ambient air pressure). Entrained water droplets or the like can also be present in the wet steam. The steam generator can be a boiler or a steam generator in the form of a flow heater, which can for example have a water tank and / or is connected to a water tank. Steam generators in household cooking appliances are generally known and will therefore not be discussed further

The heating device of the superheater module is used to heat the wet steam supplied by the steam generator via the wet steam feed line in the steam duct to a steam temperature Tshs> Ts. Such superheated (water) steam is also called "superheated steam"(" SHS ") Or" dry "steam or dry steam and typically no longer contains any liquid water such as water droplets or the like. It is therefore usually not visible to the human eye.

The domestic steam cooker can have one or more superheater modules. In the event that there are several superheater modules, these can be connected to the same steam generator or to the respective steam generator. If the domestic steam cooker has several cooking spaces, one or more superheater modules can be present in one or more of the cooking spaces.

The fact that the steam channel is connected to the steam generator via the at least one wet steam supply line includes in particular that a wet steam outlet of the steam generator is connected to a wet steam connection of the steam channel via a dedicated supply line. The dedicated supply line is in particular an elongated hollow body, i.e. its length is usually much greater than its diameter. The supply line can be designed partially or completely flexible (e.g. as a hose line made of plastic or as a corrugated hose) and / or can be designed partially or completely rigid (e.g. as a pipeline).

It is a further development that the wet steam supply line is a "closed wet steam supply line" in the sense that air from the vicinity of the supply line (e.g. from the cooking space) is not drawn into the superheater module. In this sense, a wet steam supply line is not an open supply line.

It is a further development that the wet steam supply line has one or more local or locally limited openings for the introduction of air - possibly e.g. steam-containing - air from the vicinity of the supply line (e.g. from the cooking chamber). For example, at least one air intake connector can open into the supply line. In a further development, these openings can optionally be closed and opened, e.g. by flaps, valves, etc. A wet steam supply line in this sense can also be viewed as an "open" supply line.

The heating device can have one or more heating elements, e.g. electrically operated heating elements such as thick-film resistance heating conductors, tubular heating conductors, induction heating conductors, heatable metal foams, etc.

The steam outlet device serves to output steam that has previously flowed through the steam channel in a directed manner through the at least one steam outlet opening into the cooking space. The steam outlet device can itself be channel-shaped. The fact that the steam outlet device is connected to the at least one heatable steam channel without a fan includes in particular that the steam heated in the steam channel reaches the steam outlet device without the aid of a fan, blower or the like, but only on the basis of, for example (possibly only a small) Overpressure of the steam located in the steam channel. In particular, the steam outlet device can be connected directly to the at least one heatable steam duct, that is to say without further functional units that are effective in terms of steam technology. So wet steam can enter the steam channel of the superheater module, is heated there by the heating device while it flows through the steam channel, and passes over as superheated steam into the steam outlet device. The superheated steam reaches the at least one steam outlet opening in the steam outlet device and becomes there, in particular as a steam jet with a noticeable steam speed (for example between 10 km / h and 100 km / h) introduced into the cooking space.

It is a further development that at least one steam outlet opening is designed as a nozzle. This has the advantage that a steam jet can be generated particularly reliably with a given property (e.g. flow velocity, direction, etc.).

It is a further development that at least two steam outlet openings have a different geometry in terms of shape and / or size. This has the advantage that steam jets with different properties can be generated.

It is a further development that at least one flow guide element is assigned and / or can be arranged at least one steam outlet opening. As a result, the assigned steam jet, in particular its direction of flow, can be variably adjusted. The flow guide element can be arranged, for example, on the steam outlet device and / or on the housing. The housing can be perforated in the region of at least one steam outlet opening.

It is a further development that the at least one steam outlet opening is designed and arranged in such a way that the superheated steam exits the steam outlet device practically uniformly in relation to a volume flow, a spatial distribution and / or a steam temperature and / or to one for receiving the steam to be treated to be cooked flows into the space provided. For this purpose, a geometry of the at least one steam outlet opening can be selected accordingly.

However, the superheater module can also be designed in such a way that an uneven temperature and / or volume flow distribution occurs at the at least one steam outlet opening, temperature and / or volume flow e.g. differing for different steam outlet openings.

The fact that the superheater module is located completely inside the cooking chamber means in particular that no cooking chamber wall is part of the superheater module, e.g. not part of the housing. The cooking chamber wall is therefore not a functional part of the superheater module. Rather, the superheater module is an independent component, which also enables superheated steam to be generated and introduced into the cooking chamber, in particular in the form of steam jets, independently of the cooking chamber wall. This has the advantage that the shape of the cooking space wall can be designed practically independently of the superheater module.

Because the housing is arranged completely within the cooking space, the superheater module can also advantageously be integrated into a cooking appliance in a particularly simple manner, since only e.g. brackets for the superheater module, openings for the at least one wet steam supply line and for at least one electrical Line for energizing the heating device, etc. need to be provided.

The plate shape means that the housing is noticeably larger in one plane in both plane directions than perpendicular to it or in the direction of thickness or height. In other words, due to its plate-shaped basic shape, the housing has two flat sides which are separated from one another by at least one narrow side or a narrow edge. The height of the narrow side corresponds to a perpendicular distance between the two flat sides and can also be referred to as the thickness of the housing. The fact that the housing is arranged with one of its two flat sides (hereinafter referred to as “first flat side” without loss of generality) “close” to a cooking space wall (also referred to as “close to the wall”) means that the housing is spaced from the cooking space wall, but also does not exceed a predetermined maximum distance from the cooking space wall. This refers to that area or to that area of the cooking chamber wall which the first flat side faces locally and / or which is closest to the first flat side.

The fact that the housing is arranged "at least on an area covering the heating device" close to the wall includes in particular that only that area of the housing needs to be arranged close to and without touching the facing cooking chamber wall that - when viewed perpendicular to the first flat side - the heating device or corresponding heating elements covered. Other areas of the housing that do not cover the heating device or corresponding heating elements (such as edge sections, intermediate sections or the like) can also touch the cooking space wall, e.g. for spacing or support. The contact between the housing and the cooking space wall is advantageously only local or punctiform or not over a large area.

It is a further development that the housing is arranged within the cooking space completely at a distance from the cooking space wall. This means in particular that the housing - possibly except for locally limited, dedicated mechanical arrangement elements such as fastening elements, spacers, etc. - is completely spaced from the cooking chamber wall. This has the advantage that a heat transfer from the superheater module to the cooking chamber wall can be limited particularly effectively.

• - der Decke,
• - einer (bei frontalen Sicht in die Beschickungsöffnung) linken Seitenwand,
• - einer (bei frontalen Sicht in die Beschickungsöffnung) rechten Seitenwand,
• - der Rückwand oder
• - einer beliebigen Kombination davon.

The fact that the housing is arranged with its first flat side close to a cooking space wall that is present above a base includes that the housing can be arranged close to the wall

• - the ceiling,
• - a left side wall (when viewed from the front into the loading opening),
• - a right side wall (when viewed from the front into the loading opening),
• - the back wall or
• - any combination thereof.

Together with an arrangement of steam outlet openings on the second flat side of the housing, this results in the advantage that particularly effective direct wetting of the food with superheated steam can be carried out from above and / or from the side, even when the food lies on a closed food support such as a baking sheet. An arrangement close to the ceiling can also be referred to as “close to the ceiling”, while an arrangement close to the left and / or right side wall can be referred to as “close to the side wall”.

It is a further development that all steam outlet openings are arranged on the second flat side of the housing. Alternatively, at least one steam outlet opening can also be arranged on a narrow side of the housing. In particular, no steam outlet opening is arranged on the first flat side.

However, there is no provision in particular for the housing to be arranged with its first flat side close to the floor. This has the advantage that contamination of the superheater module by dripping or falling food is avoided. Such an arrangement of a bottom heating element can also be implemented more easily.

Specifically, the housing is oriented horizontally with respect to its plane extension - at least with at least one area covering the heating device - if it is arranged close to the ceiling and / or vertically if it is arranged close to the side wall or close to the rear wall. In the case of an arrangement close to the ceiling, steam openings are arranged on an underside of the housing. This advantageously enables particularly effective direct wetting of the food with superheated steam from above.

It is an embodiment that a maximum distance a the first flat side of the housing to the opposite cooking space wall does not exceed 20 mm. This is based on the knowledge that a greater distance no longer significantly increases a heat-insulating effect of the air layer between the housing and the opposite cooking chamber wall, but already noticeably reduces the usable volume that can be used to accommodate food in the cooking chamber. It is a training that a maximum distance a the first flat side of the housing to the opposite cooking space wall does not exceed in particular 15 mm, especially 12 mm.

It is an embodiment that a minimum distance between the first flat side of the housing and the opposite cooking chamber wall does not fall below 0.5 mm, since otherwise the installation effort increases considerably and it is difficult to avoid unwanted contact between the first flat side and the opposite cooking chamber wall is, especially long term.

Overall, it has been shown that the distance a the first flat side of the housing to the opposite cooking chamber wall to achieve sufficient thermal insulation through the air layer in between and to enable simple assembly is particularly advantageously in a range between 1 mm and 10 mm.

It is not necessary that the first flat side in this area is completely flat or flat (but it can be). Rather, the first flat side can have slight differences in height, which are caused, for example, by the presence of recesses and / or protrusions such as beads, reinforcing ribs, etc.

It is a further development that the superheater module has a thickness D. between 5 mm and 50 mm. This has proven to be a particularly advantageous compromise between a compact design and sufficient heating power and a sufficiently high volume flow of the steam.

It is an embodiment that the plate-shaped basic shape of the housing is a flat basic shape. This enables a particularly simple production and arrangement of the superheater module. Such a superheater module can be arranged close to the wall to the ceiling, the left side wall, the right side wall or the rear wall. If the superheater module or its housing is arranged close to the ceiling, it is advantageous that it is arranged centrally there because this enables a radiant heater to be arranged close to the ceiling laterally next to the superheater module, in particular laterally surrounding the superheater module.

It is an embodiment that the plate-shaped basic shape of the housing - when viewed on a narrow side - is L- or U-shaped basic shape. The housing can then, for example, be arranged partially close to the ceiling and extend over at least one side wall (left side wall, right side wall, rear wall). The housing then covers at least two wall sections of the cooking space wall (apart from the floor).

It is a further development that the wet steam is introduced on the first flat side or through the first flat side of the housing. This can be implemented, for example, in that a wet steam connection of the superheater, for example a nozzle, protrudes from the housing on the first flat side of the superheater module and runs in sections through the cooking space before it is passed through the opposite wall of the cooking space. The wet steam connection is then connected to the wet steam supply line, in particular on the outside of the cooking space. The wet steam connection can also be viewed as a section of the wet steam supply line. The wet steam connection can in particular lead centrally into the first flat side.

It is a further development that the wet steam is introduced into the housing through the narrow side or the edge. This can be implemented in that a wet steam connection, for example a nozzle, protrudes from the housing on the narrow side and runs in sections through the cooking space before it is passed through a side wall of the cooking space that is not opposite the first flat side.

At least one electrical line can, for example, lead into the housing on the flat side and / or on the narrow side.

It is a further development that the heating device has at least one electrically operated tubular heating element, which is located in the at least one steam channel through which steam can flow. Such a structure is robust and enables a direct heat transfer to the steam flow flowing in the steam channel. The steam channel can be formed by a pipe, possibly branched, laid inside the housing.

It is a further development that the steam channel has at least one pipe through which steam can flow and on whose wall, in particular on the outside, at least one heating element, e.g. at least one thick-film heating line, is attached. Such a structure is robust and has the further advantage that high thermal material resistance is only necessary for the carrier material of the thick-film heating cable. In addition, a particularly large and thus effective heat transfer is made possible in this way.

It is a further development that the steam channel has at least one pipe through which steam can flow and which can be inductively heated. Such a structure also has the advantage that the inside of the pipe in contact with the steam can be heated over a large area. This further development can be implemented, for example, in that the tube is a metallic tube or at least a tube with a metallic coating on the inside, around which a coil is wound on the outside.

It is a further development that at least one heatable metal foam volume through which the steam can flow is located in at least one steam channel. This has the advantage that a particularly large heatable surface comes into contact with the steam and therefore the steam can be heated particularly effectively. As a result, only a short flow path is advantageously required to heat the steam.

The superheater module can have one or more of the above developments of the heating device alone or in combination.

It is a further development that the steam channel takes a winding, e.g. meandering course. This can be implemented in such a way that the steam channel runs as uniformly as possible in the housing, so that the volume in the housing is used particularly effectively for guiding the steam. This applies in particular if the steam channel is a tubular steam channel or is formed by one or more tubes, in particular heatable tubes. However, the steam channel can also run in a straight line. The steam channel can have one or more flow branches.

It is an embodiment that the at least one steam outlet opening comprises several, in particular slit-shaped, steam outlet openings which - in particular parallel to one another - extend longitudinally in the depth direction of the cooking space, with at least one of the steam outlet openings optionally being provided with flow guide elements such as air baffles etc. Direct the steam jet towards a central area of the cooking space. This has the advantage that the steam jets emerging from the steam outlet openings are directed onto a space of the cooking space typically provided for receiving food to be cooked, and the steam jets are prevented from being directed onto a cooking space wall. To achieve this jet flow characteristic, it is particularly advantageous if the steam outlet openings when viewed from the front through the charging opening in FIG the cooking chamber are arranged off-center on the left and right on the underside of the housing.

It is an embodiment that the at least one steam outlet opening comprises several, in particular slit-shaped, steam outlet openings which extend - in particular parallel to one another - longitudinally in the width direction of the cooking space, with at least one of the steam outlet openings optionally being provided with flow guide elements such as air baffles, etc. Direct the steam jet towards a central area of the cooking space. This also has the advantage that the steam jets emerging from the steam outlet openings are directed onto a space of the cooking space typically provided for receiving food, and the steam jets are prevented from being directed onto a cooking space wall. To achieve this jet flow characteristic, it is particularly advantageous if, when viewed from the front through the loading opening into the cooking chamber, the steam outlet openings are arranged in front of and behind the center on the underside of the housing.

However, the shape of the steam outlet openings is not limited to a slit shape, but may be circular, oval, free-form, etc., for example.

It is an embodiment that the superheater module has at least one heat transfer structure for transferring heat generated by the heating device to the steam located in the steam channel. This has the advantage that the heat generated by the heating device can be transferred to the steam with particularly low losses and effectively. The heat transfer structure can also be viewed and referred to as a heat exchange structure for improving the heat exchange between the heating device and the steam. The heat transfer structure is used, for example, to enlarge a directly or indirectly heatable contact surface with the steam. To this end, a further development is that the at least one heat transfer structure is located in the steam channel or represents at least part of an inner surface of the steam channel. The heat transfer structure can also serve to increase turbulence in the steam flow for even and effective heating and distribution of the steam. In turn, a uniform temperature and volume flow distribution of the superheated steam at the at least one steam outlet opening can be improved. The heat transfer structure can also serve to guide the flow of steam. The heat transfer structure can have one or more structural elements to improve the heat exchange to the steam.

• - Drahtgeflecht: ein Drahtgeflecht ist vorteilhafterweise sehr flexibel und frei formbar und kann aus hochwertigen Metalllegierungen hergestellt werden;
• - Metallschaum: Metallschaum weist den Vorteil auf, dass er eine sehr große und regelmäßige Oberfläche aufweist und zudem aktiv heizbar ist;
• - Strömungsbeeinflussende Einbauten/Wandungen/Strukturen wie Strömungsleitelemente (z.B. Rippen, Lamellen), Verwirbelungselemente usw.;
• - Geprägte Aluminium-Chrom (AICr)-Folie: eine solche Folie weist vorteilhafterweise eine sehr hohe und regelmäßige Oberfläche auf;
• - Ein oder mehrere keramische Elemente;
• - Ein oder mehrere mikrostrukturierte Elemente;
• - Ein oder mehrere mikroperforierte Elemente.

The heat transfer structure can, for example, have one or more of the following structural elements:

• Wire mesh: a wire mesh is advantageously very flexible and freely malleable and can be made from high quality metal alloys;
• Metal foam: Metal foam has the advantage that it has a very large and regular surface and can also be actively heated;
• - Flow-influencing fixtures / walls / structures such as flow guiding elements (e.g. ribs, lamellas), turbulence elements, etc .;
• Embossed aluminum-chromium (AICr) foil: such a foil advantageously has a very high and regular surface;
• - One or more ceramic elements;
• - One or more microstructured elements;
• - One or more micro-perforated elements.

It is an embodiment that the heating device is thermally insulated from the housing. In this way, the superheater module is also thermally insulated from its surroundings. This has the advantage that heat losses during the generation of the superheated steam can be kept low. This also protects the area around the superheater module from waste heat from the superheater module, e.g. a ceiling of the cooking space and possibly any components behind it such as electronics, etc. However, thermal insulation can also be dispensed with, especially in the event that the domestic steamer is an oven or has an oven functionality, since the domestic steamer is then typically already designed for high cooking space temperatures and is no longer thermally specifically adapted to the superheater module needs to be adjusted.

The thermal insulation can be implemented, for example, in that the housing is a thermally insulating housing and / or is filled with thermally insulated material. The thermally insulating housing can, for example, have an IR-reflecting layer present on the inside.

It is an advantageous embodiment that the household steamer additionally has at least one heating element arranged on the bottom ("bottom heating element"), at least one hot air heating element and / or at least one heating element arranged on the ceiling next to the superheater module or its housing. Because in this way, food can be cooked in addition to or as an alternative to the treatment Treat with steam by radiant heat, for example in the manner of an oven, and in a further development also independently of the introduction of steam. In particular when at least one superheater module is arranged vertically on the left and / or right side, a top heat heater and a grill heater can also be arranged on the ceiling side.

It is a further development that at least one of the additional heating elements is an electrically operated radiant heating element, for example a tubular heating element, a flat IR radiator, etc.

It is a further development that the domestic steam cooker additionally only has at least one heating element arranged on the floor ("bottom heating element"), at least one hot air heating element and / or at least one heating element arranged on the ceiling next to the superheater module, i.e. no other radiant heating elements.

It is a further development that the household steam cooker on the ceiling side has exactly one heating element arranged next to the superheater module. This development allows an arrangement in which the superheater module is arranged instead of the conventional central grill or top heat radiator without complex adaptation of the household steam cooker. The additional heating element arranged next to the superheater module can be arranged instead of the conventional upper heating element or grill heating element and serve or be used as an upper heating element and / or grill element.

It is a further development that the household steamer is designed without a radiant heater on the ceiling side. This advantageously allows a particularly large-area design of the superheater on the ceiling side. In addition, influencing the superheater module by heat radiated from the radiant heater is particularly effectively prevented. The domestic steam cooker then has, in particular, only at least one radiant heater arranged on the bottom and / or one hot air heater (often in the form of, for example, a ring heater arranged on the rear).

It is a further development that the domestic steam cooker has a fan for circulating the air in the cooking space, whereby, for example, a hot air operation can be made possible.

It is a further development that the domestic steamer does not have a fan for circulating the air in the cooking space (which can also be referred to as a “non-air-circulated” domestic steamer). This has the advantage that the household steamer can be implemented in a particularly simple and inexpensive manner.

As an alternative or in addition to the at least one radiant heater, there can be at least one microwave device for treating the food to be cooked with microwaves, for example at least comprising a microwave generator, a microwave guide, an antenna and / or a mode stirrer, etc.

In one embodiment, the household steam cooker is set up to set a steam temperature of the superheated steam at the at least one steam outlet opening between 300 ° C and 500 ° C, in particular between 350 ° C and 500 ° C, in particular between 400 ° C and 500 ° C, in particular between 450 ° C and 500 ° C, very particularly advantageously between 475 ° C and 500 ° C to generate. This can be achieved, for example, via a suitable nominal heating output of the heating device and a correspondingly adjusted heating output. However, the steam temperature there can generally also be lower or even higher. For example, it is also possible to introduce superheated steam at a temperature of up to 700 ° C into the cooking space.

It is a training that the steam temperature Tshs of the superheated steam is variably adjustable at the at least one steam outlet opening, for example by a corresponding setting of the heating power of the superheater. The steam temperature Tshs can for example be set by a user or set under program control. The steam temperature Tshs can thereby advantageously be adapted, for example, to a type of food to be treated (eg meat, fish, vegetables, etc.), to a height position of the food in the cooking space (eg an insertion height used), etc.

It is a further development that the domestic steam cooker has a control device which is set up (e.g. programmed) to set or control a heating output of the steam generator and / or an output of the heating device of the superheater module. By setting the heating power of the steam generator, for example, the volume or mass flow of the wet steam and thus also of the superheated steam can be adjusted. By controlling the steam supply, the oxygen concentration in the cooking space can also be varied, since a higher proportion of steam in the cooking atmosphere is accompanied by a reduction in the oxygen content.

It is a further development that the steam generation by means of the steam generator and the heating of the wet steam by means of the superheater module by the control device are independent are controllable from each other. This allows the volume flow of the superheated steam and its temperature to be set individually.

It is a further development that the control device is set up to operate the steam generator to generate wet steam, but not to operate the heating device or only with such a low heating power that no superheated steam, but only wet steam, emerges from the steam outlet device. This has the advantage that the food to be cooked can only be treated with wet steam.

In general, the control device can be set up to treat food to be cooked with either wet steam and / or superheated steam. If other types of treatment, such as treatment using radiant heat, microwaves, etc., are possible, it is advantageous that the control device is set up to treat food to be cooked optionally using wet steam, superheated steam and / or other types of treatment, individually or in a possible combination. In general, different phases can be provided during a treatment process, in particular a cooking process, within which the food to be cooked is treated in different ways, e.g. initially a treatment with superheated steam, followed by treatment with only radiant heat, etc.

It is a further development that the control device is set up to set a heating power of at least one radiant heater and / or at least one microwave power, if this component (s) is or are present.

The control device can be used to control additional actuators such as pumps, door locks, cooling fans, etc., which can also be used to regulate the cooking operation in order to obtain the desired cooking result and to ensure safe handling.

The object is also achieved by a method for operating a domestic steam cooker as described above, wherein wet steam is generated by means of the steam generator, the wet steam is passed to the superheater module, converted into superheated steam by means of the superheater module and the superheated steam is passed through the at least one Steam outlet opening is introduced into the cooking space.

The method can be designed analogously to the domestic steam cooker and has the same advantages.

• - Behandlung des Garguts nur mit überhitztem Dampf;
• - Behandlung des Garguts nur mit Nassdampf;
• - Behandlung des Garguts nur durch Strahlungswärme (z.B. durch Aktivierung eines Unterhitze-Heizkörpers und/oder Oberhitze-Heizkörpers usw.);
• - Behandlung des Garguts nur durch Mikrowellen;
• - Behandlung des Garguts mit überhitztem Dampf in Kombination mit Strahlungswärme;
• - Behandlung des Garguts mit Nassdampf in Kombination mit Strahlungswärme;
• - Behandlung des Garguts mit überhitztem Dampf in Kombination mit Mikrowellen;
• - Behandlung des Garguts mit Nassdampf in Kombination mit Mikrowellen;
• - Behandlung des Garguts mit überhitztem Dampf in Kombination mit Mikrowellen und Strahlungswärme;
• - Behandlung des Garguts mit Nassdampf in Kombination mit Mikrowellen und Strahlungswärme,

und zwar in beliebiger Zahl und Reihenfolge.In this way, one or more of the following phases can be carried out during a treatment process, if provided for by the design:

• - Treatment of the food only with superheated steam;
• - Treatment of the food only with wet steam;
• - Treatment of the food only by radiant heat (eg by activating a bottom heating element and / or top heating element, etc.);
• - Treatment of the food using microwaves only;
• - Treatment of the food with superheated steam in combination with radiant heat;
• - Treatment of the food with wet steam in combination with radiant heat;
• - Treatment of the food with superheated steam in combination with microwaves;
• - Treatment of the food with wet steam in combination with microwaves;
• - Treatment of the food with superheated steam in combination with microwaves and radiant heat;
• - Treatment of the food with wet steam in combination with microwaves and radiant heat,

in any number and order.

• 1 zeigt in einer Ansicht von schräg oben ein Überhitzermodul gemäß einem ersten Ausführungsbeispiel;
• 2 zeigt in einer Ansicht von schräg oben ein Überhitzermodul gemäß einem zweiten Ausführungsbeispiel;
• 3 zeigt in einer Frontalansicht ein Haushalts-Dampfgargerät, das mit dem Überhitzermodul gemäß dem ersten Ausführungsbeispiel ausgerüstet ist;
• 4 zeigt das Überhitzermodul gemäß dem ersten Ausführungsbeispiel in Ansicht von unten;
• 5 zeigt in einer Frontalansicht ein Haushalts-Dampfgargerät, das mit dem Überhitzermodul gemäß dem zweiten Ausführungsbeispiel ausgerüstet ist;
• 6 zeigt das Überhitzermodul gemäß dem zweiten Ausführungsbeispiel in Ansicht von unten;
• 7 zeigt in einer Frontalansicht ein weiteres Haushalts-Dampfgargerät, das mit einem Überhitzermodul gemäß einem ersten Ausführungsbeispiel ausgerüstet ist;
• 8 zeigt in einer Frontalansicht ein Haushalts-Dampfgargerät, das mit einem Überhitzermodul gemäß einem dritten Ausführungsbeispiel ausgerüstet ist; und
• 9 zeigt in einer Frontalansicht ein Haushalts-Dampfgargerät, das mit einem Überhitzermodul gemäß einem vierten Ausführungsbeispiel ausgerüstet ist.

The properties, features and advantages of this invention described above and the manner in which they are achieved will become clearer and more clearly understandable in connection with the following schematic description of an exemplary embodiment which is explained in more detail in connection with the drawings.

• 1 shows, in a view obliquely from above, a superheater module according to a first embodiment;
• 2 shows in a view obliquely from above a superheater module according to a second embodiment;
• 3 shows in a front view a domestic steam cooker which is equipped with the superheater module according to the first embodiment;
• 4th shows the superheater module according to the first embodiment in a view from below;
• 5 shows in a front view a domestic steam cooker which is equipped with the superheater module according to the second embodiment;
• 6th shows the superheater module according to the second embodiment in a view from below;
• 7th shows in a front view a further domestic steam cooker which is equipped with a superheater module according to a first embodiment;
• 8th shows in a front view a domestic steam cooker which is equipped with a superheater module according to a third embodiment; and
• 9 shows in a front view a domestic steam cooker which is equipped with a superheater module according to a fourth embodiment.

1 shows a superheater module in a view obliquely from above 1 with a housing 2 . The case 2 has a planar, cuboid-like, plate-shaped basic shape in such a way that it is along its plane directions, namely the width x and the depth y , is noticeably larger than in the vertical extension z , in particular at least five times larger, in particular at least ten times larger.

On a first flat side 3 of the housing 2 a pipe socket-shaped wet steam connection protrudes 4th before, while on its edge side or narrow side 5 two electrical lines 6th are executed. The wet steam connection 4th leads to one inside the case 2 located steam channel 10 which is also located within the housing 2 located heating device 7th Can be heated so that through the wet steam connection 4th supplied wet steam N to superheated steam SHS is convertible. To the steam duct 10 one also closes inside the housing 2 housed steam outlet device 25th at. Steam outlet openings 9 the steam outlet device 25th (e.g. simple openings, nozzles, etc.) for the superheated steam SHS are designed on a second flat side 8th of the housing 2 arranged that superheated steam SHS from the area of the second flat side 8th is deliverable. The steam channel 10 can have at least one heat transfer structure (not shown) for more effective transfer of heat through the heating device 7th generated heat on the in the steam channel 10 pouring steam N , SHS exhibit.

Through the wet steam connection 4th supplied wet steam N is consequently in the steam channel 10 introduced and can there by means of the heating device 7th heated so much that it turns into superheated steam SHS is converted. The superheated steam SHS is under a (possibly only slight) overpressure, so that after passing through the steam channel 10 at the at least one steam outlet opening 9 flows out at a noticeable flow rate, in particular in the form of a directed jet of steam SJ (please refer 5 ). The flow speed can, for example, be in a range between 10 km / h and 100 km / h, possibly even higher.

In particular, the at least one steam outlet opening 9 superheated steam SHS dispense in a temperature range between 300 ° C and 500 ° C. However, the steam temperature there can Tshs generally also be lower or even higher, e.g. for superheated steam SHS between 100 ° C and 300 ° C or between 500 ° C and 700 ° C.

The housing can be used for thermal insulation 2 be provided on the inside with an IR-reflecting coating or film, and / or a volume between the housing 2 and the heater 7th can be filled with thermally insulating material.

The superheater module 1 advantageously has a thickness D. between 5 mm and 30 mm.

The superheater module 1 can be produced separately.

2 shows a superheater module in a view obliquely from above 11 . The superheater module 11 has a similar basic structure as the superheater module 1 , but now the wet steam connection 4th on the narrow side 5 of the housing 12th next to the electrical lines 6th is located. The number, position, shape and / or size of the at least one steam outlet opening 9 may differ from the superheater module 1 differentiate, as explained in more detail below, but does not need to be.

3 shows a domestic steamer in a front view 14th , the one with the superheater module 11 is equipped. The superheater module 11 is near a ceiling 16a (e.g. at a distance a between 1 mm and 10 mm) in one through a cooking chamber wall 15th limited cooking space 16 of the household steamer arranged, with its (x, y) plane aligned horizontally. This is where the housing is located 2 completely inside the oven 16 . The cooking space 16 has a front loading opening 17th on that by means of a door 18th can be closed in a vapor-tight manner.

Outside the cooking space 15th there is a steam generator 19th for generating wet steam N , which is via a wet steam supply line 20th , e.g. in the form of a hose, to the wet steam connection 4th connected. The wet steam supply nozzle 4th is like the electrical wiring 6th through the back of the oven wall 15th guided.

Furthermore, the household steamer 14th a bottom heating element 21 , for example in the form of a tubular heater.

Operation of the steam generator 19th , the superheater module 11 and the bottom heating element 21 (for example their heating power (s)) is by means of a control device 22nd controllable, in particular also independently of one another. In one variant, the superheater module 11 only operated when the steam generator is also operated 19th is operated.

Become the steam generator 19th and the superheater module 11 operated at the same time, the superheated steam emerges SHS as steam jet (s) SJ on the second flat side on the underside 8th of the superheater module 11 the end.

4th shows the superheater module 11 in view of the second flat side 8th . The steam outlet openings 9 are slit-shaped and extend lengthways here, for example, in the width direction x . The steam outlet openings 9 are in the depth direction y arranged parallel to each other staggered. The off-center steam outlet openings 9 are air control elements 23 , for example in the form of air baffles assigned. The air control elements 23 serve to control the escaping steam jets SJ in the direction of a central area of the cooking space 16 divert, in which the food G is typically located, as in 3 indicated. Even if the food G is being cooked by overheated steam SHS is treated at a high temperature of over 300 ° C, the thermal load remains on the cooking chamber wall 15th therefore below 300 ° C. This has the advantage that the cooking space wall 15th , the door 8th , Seals, etc. then do not need to be specially thermally adapted.

Alternatively can 4th with the reference numerals 9 Breakthroughs in the second flat sides 8th show through which of the steam outlet openings (for example rows of nozzles) arranged along the perforations, steam jets SJ in the oven 16 be delivered.

5 shows in a front view through a loading opening 15th a household steamer 24 , the one with the superheater module 1 is equipped. The household steamer 24 has a similar basic structure as the steamer 14th on, but now the wet steam connection 4th through the ceiling 16a the wall of the oven 15th is led.

6th shows the superheater module 1 in view from below on its underside 8th . In contrast to the superheater module 11 are the slit-shaped steam outlet openings 9 now in the depth direction y aligned lengthways, specifically in the width direction x staggered parallel to each other. In addition, in the variant shown, they are divided into two sections with regard to their longitudinal direction (depth direction). Here are the steam outlet openings 9 in width direction x Arranged left and right of the center, while a central steam outlet 9 is missing (but can be present in another variant not shown). Also these steam outlet openings 9 are air control elements 23 assigned, which the exiting steam jets inwards in a central area of the cooking space 16 redirect, as in 5 indicated.

7th shows a domestic steamer in a front view 26th that as in 5 shown close to the ceiling with a superheater module 1 is equipped. In addition, the household steamer 26th one superheater module each on the left wall of the cooking space and on the right wall of the cooking space 1a respectively. 1b on. The superheater modules 1a and 1b are analogous to the superheater module 1 built up, but now oriented vertically due to their arrangement close to the side wall. The associated steam outlet openings 9 the superheater modules 1a and 1b can differ from the steam outlet openings in terms of their number, shape and orientation 9 of the superheater module 1 be trained.

In general, the superheater modules 1 , 1a and 1b in a development by the control device 22nd be independently controllable, for example depending on the type, size and insertion height of the food to be treated G. Thus, only the superheater module 1 operated, in another operating mode only the superheater modules 1a and 1b operated and in yet another operating mode all superheater modules 1 , 1 a and 1b operated jointly. The superheater modules 1 , 1 a and 1 b can be connected to a common steam generator 19th connected (if necessary via a controllable steam switch) or to a respective steam generator 19th be connected.

8th shows a domestic steamer in a front view 27 that comes with a superheater module 28 is equipped according to a third embodiment. The plate-shaped superheater module 28 is similar to the superheater module 1 built up, but now points to the narrow side when viewed from the front 29 of the housing 30th not a flat shape, but an inverted U-shape. This allows steam jets SJ from the second flat side 31 of the housing 30th similar to the household steamer 26th be generated. The first flat side 32 shows one of the left cooking space wall, the ceiling 16a and the right-hand oven wall close to the following shape.

9 shows a domestic steamer in a front view 32 , the one with a plate-shaped superheater module 33 is equipped according to a fourth embodiment. The superheater module 34 is similar to the superheater module 28 constructed, but in contrast to the superheater module 28 (or the superheater modules 1 , 1a , 1b and 11 ) not completely from the wall of the cooking space 15th spaced. Rather, it is a bottom margin 35 of the housing 36 designed as a support or seat edge, which does not sit over a large area, but in a linear manner on the left and right cooking chamber wall and the superheater module 33 supports there. The heater 7th or heating elements thereof are not located within the edge 35 , but is so far removed that there is a thermal influence on the contact surface with the cooking chamber wall 15th is not critical. The edge 35 so does not provide the heating device 7th covering area of the housing 36 represent.

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

In general, “a”, “one” etc. can be understood as a singular or plural number, in particular in the sense of “at least one” or “one or more” etc., as long as this is not explicitly excluded, for example by the expression “exactly a "etc.

A numerical specification can also include exactly the specified number as well as a customary tolerance range, as long as this is not explicitly excluded.

List of reference symbols

1

Superheater module

1a

Superheater module

1b

Superheater module

2

casing

3

First flat side of the case

4th

Wet steam connection

5

Second flat side of the housing

6th

Electrical line

7th

Heater

8th

Underside of the case

9

Steam outlet opening

10

Steam duct

11

Superheater module

12th

casing

13th

Underside of the case

14th

Household steamer

15th

Oven wall

16

Cooking space

16a

ceiling

17th

Loading opening

18th

door

19th

Steam generator

20th

Wet steam supply line

21

Bottom heat radiator

22nd

Control device

23

Air control element

24

Household steamer

25th

Steam outlet device

26th

Household steamer

27

Household steamer

28

Superheater module

29

Narrow side

30th

casing

31

Second flat side

32

First flat side

33

Household steamer

34

Superheater module

35

Lower edge of the case

36

casing

a

distance

D.

Case thickness

N

Wet steam

SHS

Superheated steam

SJ

Steam jet

Tn

Steam temperature of the wet steam

Tshs

Steam temperature of the superheated steam

x

broad

y

depth

z

height

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• US 10429082 B2 [0002]
• EP 1729065 A1 [0003, 0004]
• EP 1757861 A1 [0003]
• EP 1628079 A1 [0004, 0008]
• EP 1515093 A2 [0005]
• EP 1514474 A1 [0005]
• EP 1517092 A1 [0005]
• EP 1514475 B1 [0006]
• EP 1517095 A2 [0007]
• EP 1628078 A1 [0008]
• WO 2007/069855 A1 [0009]
• EP 2314925 A1 [0010]
• EP 2322860 A1 [0010]
• EP 2330353 A1 [0011]
• EP 2503236 A1 [0012]
• EP 0335796 A1 [0013]
• EP 856704 B1 [0014]
• US 4851644 A1 [0015]
• US 7418960 B2 [0016]
• US 7915568 B2 [0017]
• JP 2007020612 A [0018]
• JP 2004301354 A [0019]

Claims (14)

Household steam cooker (14; 24; 26; 27; 33), having - a cooking space (16) provided with a loading opening (17), - A steam generator (19) arranged outside the cooking space (16) for generating wet steam (N) and - At least one superheater module (1; 1a, 1b; 11; 21; 28; 34) connected to the steam generator (19) via at least one wet steam feed line (20) for heating the wet steam (N) to superheated steam (SHS) and outputting it of the superheated steam (SHS) into the cooking space (16), the superheater module (1; 1a, 1b; 11; 21; 28; 34) having a housing (2; 12; 30; 36) with a plate-shaped basic shape in which at least are accommodated: - At least one steam duct (10) connected on the inlet side to the wet steam supply line (20), - A heating device (7) for heating the wet steam (N) located in the steam duct (10) to superheated steam (SHS), - At least one steam outlet device (25) connected to the at least one steam duct (10) on the outlet side without a fan and having at least one steam outlet opening (9) directed into the cooking chamber (16) for the superheated steam (SHS), wherein - The housing (2; 12; 30; 36) is arranged completely within the cooking space (16), - The housing (2; 12; 30; 36) with a first flat side (3; 32) of its two flat sides (3, 8; 31, 32) at least in an area covering the heating device (7) close to an area above a floor existing cooking space wall (15, 16a) is arranged and wherein - Steam outlet openings (9) are arranged on the other, second flat side (8; 31) of the housing (2; 12; 30; 36). Household steam cooker (14; 24; 26; 27; 33) according to Claim 1 , wherein a maximum distance (a) between the first flat side (3; 32) and the opposite cooking space wall (15, 16a) does not exceed 20 mm. Household steam cooker (14; 24; 26; 27; 33) according to one of the Claims 1 until 2 , wherein a minimum distance (a) between the first flat side (3; 32) and the opposite cooking space wall (15, 16a) does not fall below 0.5 mm. Household steam cooker (14; 24; 26; 27; 33) according to the Claims 2 and 3 , the distance between the first flat side (3; 32) and the opposite cooking space wall (15, 16a) being in a range between 1 mm and 10 mm. Domestic steamer (14; 24; 26) according to one of the preceding claims, wherein the plate-shaped basic shape of the housing (2; 12) is a flat basic shape. Household steam cooker (27; 33) according to one of the Claims 1 until 4th , wherein the plate-shaped basic shape of the housing (30; 36) is an L- or U-shaped basic shape. Domestic steam cooker (24) according to one of the preceding claims, wherein the at least one steam outlet opening (9) comprises a plurality of steam outlet openings (9) which extend longitudinally in the depth direction (y) of the cooking space (16), at least one of the steam outlet openings (9) with Flow guide elements (23) are provided, which direct the respectively exiting steam jet (SJ) in the direction of a central region of the cooking space (16). Domestic steam cooking appliance (14) according to one of the preceding claims, wherein the at least one steam outlet opening (9) comprises a plurality of steam outlet openings (9) which extend longitudinally in the width direction (x) of the cooking space (16), at least one of the steam outlet openings (9) with Flow guide elements (23) are provided, which direct the respectively exiting steam jet (SJ) in the direction of a central region of the cooking space (16). Domestic steam cooking appliance (14; 24; 26; 27; 33) according to one of the preceding claims, wherein the superheater module (1; 1a, 1b; 11; 21; 28; 34) has at least one heat transfer structure for transferring through the heating device (7) generated heat on the in the steam channel (10) located steam (N, SHS). Domestic steam cooker (14; 24; 26; 27; 33) according to one of the preceding claims, wherein the heating device (7) against the housing 2; 12; 30; 36) is thermally insulated. Domestic steam cooker (14; 24; 26; 27; 33) according to one of the preceding claims, wherein the domestic steam cooker (14; 24; 26; 27; 33) is set up to set a steam temperature (Tshs) of the superheated steam (SHS ) at the at least one steam outlet opening (9) between 300 ° C and 500 ° C. Domestic steamer (14; 24; 26; 27; 33) according to one of the preceding claims, wherein the domestic steam cooker (14; 24; 26; 27; 33) additionally has at least one heating element (21) arranged on the bottom, at least one hot air heating element and / or at least one heating element arranged on the ceiling next to the superheater module (1; 11). Domestic steam cooker (14; 24; 26; 27; 33) according to one of the preceding claims, wherein the domestic steam cooker (14; 24; 26; 27; 33) has a control device (23) for controlling a heating output of the steam generator (19) and the superheater module (1; 1a, 1b; 11; 21; 28; 34), the control device (23) being set up to optionally also at least one superheater module (1; 1a, 1b; 11) when the steam generator (19) is in operation ; 21; 28; 34) to generate superheated steam (SHS). Method for operating a domestic steam cooker (14; 24; 26; 27; 33) according to one of the preceding claims, wherein wet steam (N) is generated by means of the steam generator (19), the wet steam (N) to the superheater module (1; 1a , 1b; 11; 21; 28; 34) by means of the superheater module (1; 1a, 1b; 11; 21; 28; 34) is converted into superheated steam (SHS) and the superheated steam (SHS) is introduced into the cooking chamber (16) through the at least one steam outlet opening (9).

Images