EP3892923A1 - Cooking device with a cooking chamber and method for cleaning - Google Patents

Abstract

The invention relates, inter alia, to a cooking appliance (2) comprising a cooking space (4), a distribution system (12) for a cleaning liquid for cleaning the cooking space (4) and a circulation system (14) for circulating the cleaning liquid with a pump (16), a drain line (18) and an inlet line (20), the pump (16) by means of the drain line (18) in a flow-guiding manner on an outlet (22) of the cooking chamber (4) arranged in a cooking chamber floor (6) of the cooking chamber (4) and by means of the inlet line (20) is connected to an inlet opening (24) of the distributor system (12) in a flow-conducting manner, the distributor system (12) having a distributor disk (26) with a pivot pin (28) for connection, preferably for the torque-transmitting connection, to a shaft of the cooking appliance (2).

Description

The invention relates to a cooking appliance with a cooking space and a method for cleaning the cooking space with a cleaning liquid.

Such cooking devices with cooking chambers and methods for cleaning them with a cleaning liquid are for example from the publications US 2016174574 A1 and DE 202007010924 U1 and EP 3190344 A1 already known. The cleaning fluid used is as in the publication WO 2015091803 A1 discloses, for example, water from a fixed water connection or from a storage container of the cooking appliance.

In addition, from the publication EP 3346192 A1 a rotatable distributor disk with a base plate arranged perpendicular to the axis of rotation and with at least three blades is known, a chamber for receiving cleaning fluid being formed between adjacent blades. This document also shows a method for cleaning a cooking chamber.

The invention thus poses the problem of improving the cleaning of a cooking chamber of a cooking appliance with a cleaning liquid.

According to the invention, this problem is solved by a cooking appliance with the features of claim 1 and a method with the features of claim 10. Advantageous refinements and developments of the invention emerge from the following dependent claims.

The advantage that can be achieved with the invention is, in particular, that the cleaning of a cooking chamber of a cooking appliance with a cleaning liquid is improved. By means of the invention, the cleaning of soiled areas in the cooking space is significantly improved by a more targeted and thus more effective and time-saving and cost-effective application of cleaning liquid. The cleaning liquid can be, for example, water from a fixed water connection or from a storage container of the cooking appliance. However, other cleaning fluids are also conceivable. For example, water from a fixed water connection or from a storage container of the cooking device could be mixed with a cleaning agent concentrate or the like to the cleaning liquid for cleaning the cooking space.

The distributor disk is also fixed, detachable or can be connected to the cooking appliance only for the purpose of cleaning the cooking space. Furthermore, the distributor plate is for one with its own drive and the other can be driven by the power of the cleaning fluid. Accordingly, the distributor disk can be used advantageously for a large number of different applications.

In a preferred embodiment of the distributor system, the distributor disk is only partially arranged in the distributor housing.

The cooking device also enables the cleaning liquid to be circulated, so that less cleaning liquid is used and cleaning is more efficient as a result.

The method also enables the execution of mutually different cleaning programs for needs-based cleaning of the cooking space. By varying the rotational speed of the distributor disk of the distributor system, for example, the trajectory of the cleaning fluid can be set as desired, so that areas of the cooking chamber arranged at different distances from the distributor system can advantageously be reached by means of the cleaning fluid dispensed by the distributor system. The aforementioned variation of the rotational speed also enables an alternating and therefore pulsating application of cleaning fluid to the individual areas of the cooking space.

An advantageous development of the distributor disc provides that each of the wings encloses an acute angle with the longitudinal axis of the pivot pin, preferably that each of the wings has a first wing section starting from the base plate and one that adjoins the first wing section in the direction of a free end of the wing having second wing portion. It is provided that the two wing sections enclose different angles with the base plate. In this way, targeted guidance of the cleaning liquid is made possible. For example, it is possible to specifically guide the cleaning liquid in a first direction of rotation of the distributor disk onto the base plate in order to apply cleaning liquid to the cooking chamber walls and a cooking chamber wall designed as a cooking chamber floor. In a second direction of rotation of the distributor disc that is opposite to the first direction of rotation, the cleaning liquid can be directed to a cooking chamber wall of the cooking chamber designed as a cooking chamber ceiling by means of the inclined blades. The aforementioned specific angle values for the individual wing sections have proven to be particularly effective for conventional cooking spaces of cooking appliances.

According to one embodiment it is provided that the first wing section encloses an angle α with the base plate and the second wing section encloses an angle β with the base plate, where β is greater than α. This makes the effect of the direction-dependent Distribution of the cleaning fluid increased. In particular, it is provided that the angle β is approximately 10 ° greater than the angle α.

One aspect is that the first wing section encloses an angle α with the base plate, where α has a value of 75 °.

One aspect is that the second wing section encloses an angle β with the base plate, where β has a value of 85 °.

An advantageous development of the distributor disc provides that each of the wings encloses an acute angle with the longitudinal axis of the pivot pin, preferably that each of the wings has a first wing section starting from the base plate and one that adjoins the first wing section in the direction of a free end of the wing having the second wing section, the first wing section enclosing an angle α of 75 ° with the base plate and the second wing section enclosing an angle β of 85 ° with the base plate. In this way, targeted guidance of the cleaning liquid is made possible. For example, it is possible to specifically guide the cleaning liquid in a first direction of rotation of the distributor disk onto the base plate in order to apply cleaning liquid to the cooking chamber walls and a cooking chamber wall designed as a cooking chamber floor. In a second direction of rotation of the distributor disc that is opposite to the first direction of rotation, the cleaning liquid can be directed to a cooking chamber wall of the cooking chamber designed as a cooking chamber ceiling by means of the inclined blades. The aforementioned specific angle values for the individual wing sections have proven to be particularly effective for conventional cooking spaces of cooking appliances.

A further advantageous development of the distributor disc provides that each of the vanes extends essentially to a free end of the base plate and to a free end of the pivot pin, the respective vane having an L-shape, preferably that the base plate has a diameter D of 50 mm and / or the pivot pin has an outer diameter d of 8 mm and / or each of the L-shaped wings has a height h of 6 mm at its free end associated with the base plate and a height H of 22 at its free end associated with the pivot pin mm, particularly preferably that the diameter D of the base plate is designed so that it is matched to a rotational speed of the rotary bolt that the cleaning fluid can be applied to substantially the entire cooking space by means of the distributor disk. In this way, on the one hand, the contact area of the respective wing with the cleaning fluid is maximized. On the other hand, the L-shape of the respective wing enables the cleaning liquid to be passed on in a targeted manner from a distributor housing into the cooking chamber. In the preferred embodiment of this development, the base plate and / or the Pivot bolts and / or each of the L-shaped wings are particularly suitable for conventional cooking space dimensions of cooking spaces. Thus, the distributor disk with the base plate on one side is dimensioned sufficiently large to distribute the cleaning liquid in the previously determined manner in the cooking space. On the other hand, the distributor disk with the base plate is dimensioned as small as possible, so that an undesired heat discharge from the cooking space can be reduced to only a small amount by means of the distributor disk. If the cooking appliance is designed as a steam cooker or has cooking functions with steam, this also restricts the undesired formation of condensation on the distributor disk to only a small extent. A distributor disk that is as small as possible also has the advantage that a rotary movement of the distributor disk requires less torque, so that, for example, an electric drive for any shaft connected to the rotary bolt in a torque-transmitting manner has to be designed to be less powerful. The energy consumption when operating the distribution system is correspondingly reduced. Furthermore, this also effectively reduces the noise emission during the operation of the distribution system. In order to additionally increase the aforementioned advantages, it makes sense to reduce the wall thicknesses of the distributor disk to a minimum required for proper functioning of the distributor disk. The use of correspondingly lighter materials for the distributor disk is also beneficial in this context. In the particularly preferred embodiment of this development, thorough cleaning of essentially the entire cooking space is implemented in a simple manner in terms of design and control.

An advantageous development of the cooking appliance provides that the pump is designed as a reversible pump. In this way, the cleaning liquid can be conveyed against a direction of circulation of the circulation system and thus backwashing of the drainage of the cooking space. The intensity of the backwashing of the drain can also be controlled by means of the pump. For example, the pump for backwashing the drain can be operated at maximum power in order to convey any solids clogging the drain as far away from the drain as possible. Thus, when these solids flow back with the cleaning liquid in the direction of the drain, there is enough time so that the solids are decomposed by the cleaning liquid in such a way that the solids can be discharged from the cooking chamber unhindered through the drain.

Analogously to this, an advantageous further development of the aforementioned embodiment of the method provides that the pump conveys the cleaning liquid through the drain against the direction of circulation of the circulation system during the backwashing state. In this way, the drain can be backwashed by means of the cleaning fluid, for example without additional lines or the like.

An alternative or additional development of the cooking appliance provides that the pump is designed and arranged in such a way that when the pump is switched off, gravity-related backflow of the cleaning liquid is enabled. This enables backwashing of the drain of the cooking chamber against the direction of circulation of the circulation system, even without operating the pump, by using the amount of cleaning fluid present in the supply line, in the pump and in the drain line to backwash the drain.

Analogously to this, an advantageous development of the method provides that the pump is switched off during the backwashing state in such a way that the cleaning liquid is conveyed through the drain by means of gravity against the direction of circulation of the circulation system.

A particularly advantageous development of the cooking device provides that the distributor housing is arranged outside of the cooking chamber and the distributor disk on the one hand with a side of the distributor disk facing the distributor housing through an opening in a cooking chamber wall of the cooking chamber dips into the distributor housing and on the other hand with a side of the distributor disk facing the cooking chamber Side of the distributor disc with the base plate protrudes through the opening into the cooking space. In this way it is possible to supply the distributor disc with water particularly well. This design also makes it possible to minimize the space required for the distribution system in the cooking space and / or to enable a more uniform wetting of the cooking space walls delimiting the cooking space, i.e. the cooking space floor, the cooking space ceiling and the side cooking space walls.

An advantageous further development of the aforementioned embodiment of the cooking device provides that the distributor disk is designed and arranged in the cooking chamber in such a way that the base plate of the distributor disk essentially covers the opening in the cooking chamber wall with a view from the cooking chamber perpendicular to the base plate. In this way, for example, the shaft connected to the pivot pin of the distributor disk, preferably connected in a torque-transmitting manner, as well as an electric drive of the cooking appliance that drives this shaft, is effectively protected from heat radiation from the cooking space. The energy efficiency of the cooking appliance is correspondingly increased. Furthermore, this results in a visually pleasing overall impression of the cooking space.

The distribution system can thus have an electric drive connected to the pivot pin of the distribution system in a torque-transmitting manner. As a result, the pivot pin and thus the distributor disk can be driven independently of the supply of cleaning fluid. Correspondingly, for example, by means of the rotational speed of the distributor disk, that is to say its rotational speed, the trajectory curve of the Set the cleaning fluid independently of the amount of cleaning fluid supplied to the distributor disc. Furthermore, it is possible to control the electric drive in such a way that the distributor disc is operated against the usual direction of rotation, so that cleaning liquid can, for example, be conveyed in a targeted manner to the cooking chamber ceiling.

As an alternative or in addition to this, another advantageous development of the cooking device provides that the inlet opening and the distributor disk of the distributor system are designed and arranged in relation to one another in such a way that the distributor disk can be driven by means of the cleaning liquid. In this way, on the one hand, the distributor disk can be driven independently of an electrical drive for the distributor disk. Accordingly, there is basically no need for an electrical drive for the distributor disc. For example, it is conceivable that the speed of rotation of the distributor disk can be changed by varying the flow rate of cleaning fluid through the inlet opening of the distributor system. For this purpose it is possible, for example, to vary the delivery amount of cleaning fluid or a free cross section in the inlet opening accordingly in the desired manner.

One aspect is that the inlet opening, in particular together with the inlet line in the area of the inlet opening, is aligned in such a way that a fluid flow emerging from the inlet opening is oriented radially to the axis of rotation of the distributor disk. For this purpose, the line axis oriented parallel to the flow direction and / or the surface normal of the cross section of the inlet opening is oriented radially to the axis of rotation of the distributor disk. This configuration enables a particularly homogeneous distribution of the cleaning liquid in the annular space.

A particularly advantageous development of the cooking appliance provides that the distribution system is arranged approximately in the middle of a cooking chamber wall designed as a cooking chamber ceiling, preferably that the distribution system is arranged essentially vertically above the drain. In this way, a particularly favorable arrangement of the distribution system relative to the cooking space of the cooking appliance is selected, since this ensures that cleaning fluid is applied to the individual areas of the cooking space. The preferred embodiment of this development also has the advantage that the process can be cleaned by means of the distribution system without additional design or circuitry outlay. For example, cleaning of the drain is implemented in a structurally particularly simple manner in that the cleaning liquid can be directed from the distributor system onto the drain due to gravity. In particular, with this arrangement of distributor disk and outlet, vertically one above the other, when the distributor disk is stationary, the cleaning liquid can drip or flow from the distributor disk directly onto the outlet.

One aspect of the invention is that the distributor disc and the outlet are at a distance of at least 15 centimeters, preferably greater than 20 centimeters. This distance has proven to be sufficient so that the cleaning liquid falling from the distributor disc, dripping or flowing, has sufficient kinetic energy when it hits the drain or a sieve of the drain to crush the suspended matter and thus block the sieve and / or to automatically correct and / or prevent the process.

Another advantageous development of the cooking appliance provides that the supply line is additionally connected to the outlet in a flow-conducting manner by means of a bypass line of the circulation system, the bypass line being lockable in non-bypass operation by means of at least one valve. In this way, a gravity-related backflow of the cleaning liquid and thus a backwashing of the drainage of the cooking chamber against the direction of circulation of the circulation system is made possible even with pumps that are not designed as a reversible pump or not as pumps that allow a gravity-related backflow of the cleaning liquid.

Analogously to this, an advantageous development of the method provides that the feed line is directly connected to the drain by means of the bypass line in a flow-conducting manner during the backwashing state, so that the cleaning liquid is conveyed through the drain in the bypass mode by means of gravity counter to the direction of circulation of the circulation system.

Another advantageous development of the cooking device provides that the cooking device has a steam generator, the steam generator being connectable to the drain in a steam cleaning mode by means of a steam line and the steam line being lockable in a non-steam cleaning mode by means of at least one valve. This enables a highly efficient type of cleaning of the drain that is alternative to the use of the cleaning fluid.

A particularly advantageous development of the aforementioned embodiment of the cooking device provides that the steam line comprises the inlet line and the outlet line or the outlet line, wherein the inlet line or the outlet line can be blocked in the steam cleaning mode by means of at least one valve in such a way that no steam from the inlet opening of the distributor system exit. In this way, on the one hand, the inlet line and the outlet line or the outlet line can be used for the conduction of the steam from the steam generator to the outlet, so that the need for an additional steam line is minimized. In addition, the steam can be used not only to clean the drain, but also to clean and sterilize the feed line and the drain line or the drain line.

Analogous to the two last-mentioned embodiments, an advantageous further development of the method provides that the steam generator is connected to the drain during the steam cleaning operation indirectly by means of the steam line, by means of the inlet line and the drain line or the drain line, or directly in a flow-guiding manner, so that a by means of the steam generator generated steam is conveyed through the drain.

An advantageous development of the method provides that the cleaning program is designed in such a way that at the beginning of the at least one cleaning cycle the distributor disk is operated at a maximum rotational speed of the cleaning cycle and the rotational speed is reduced after a predetermined period of time. Due to the maximum speed of rotation at the beginning of each of the at least one cleaning cycle, any inertia, contamination or sticking of the distribution system is overcome, for example, or the axis of rotation is prevented from sticking. The subsequent lowering of the rotational speed, for example, reduces the consumption of electrical energy. A maximum rotational speed of the distributor disk that correlates with the maximum rotational speed of the distributor disk can be, for example, 5000 revolutions / minute. The speed can subsequently be reduced continuously or discontinuously to a value of 0 revolutions / minute, for example.

A further advantageous development of the method provides that in at least one of the at least one cleaning cycle at least one sudden increase, preferably a plurality of sudden increases, in the speed of rotation of the distributor disk takes place after the maximum rotational speed of the distributor disk, with one sudden increase in each case a reduction in the rotational speed immediately follows in time. This makes it possible to apply a surge of cleaning liquid to the cooking chamber walls, that is to say the cooking chamber floor, the cooking chamber ceiling and the side walls of the cooking chamber, in a structurally and circuit-technically simple manner. Accordingly, the mechanical cleaning of the cooking chamber walls by means of the cleaning liquid is significantly improved. For example, the aforementioned reduction can take place in stages, namely a reduction from the maximum speed of 5000 revolutions / minute to a first intermediate speed of 1000 revolutions / minute in a period of 30 seconds, followed by a sudden increase in speed from the first intermediate speed of 1000 revolutions / Minute to a second intermediate speed of 1500 revolutions / minute within less than a second or a few seconds, followed by a reduction in speed from the second intermediate speed of 1500 revolutions / minute to an upper speed of 700 revolutions / minute over a period of about 60 Seconds and finally one Sudden reduction in speed from the upper speed of 700 revolutions / minute to a lower speed of preferably 0 revolutions / minute within less than a second or a few seconds.

In principle, the at least one cleaning cycle stored in the cleaning program can be freely selected within wide, suitable limits. An advantageous development of the method provides that the at least one cleaning cycle has a sawtooth-like profile in a speed-time diagram. In this way, the application of the cleaning liquid to the walls of the cooking space is designed to be pulsating during the entire cleaning cycle. For example, the maximum speed of the distributor disk at the beginning of a cleaning cycle, analogous to the above, can be 5000 revolutions / minute and then continuously reduced to the upper speed with a value of 700 revolutions / minute within 45 seconds, then again within 45 seconds Increased steadily from the upper speed of 700 revolutions / minute to the maximum speed of 5000 revolutions / minute, then again continuously decreased within 45 seconds to the upper speed with a value of 700 revolutions / minute, subsequently again within 45 seconds steadily increased from the upper speed with 700 revolutions / minute to the maximum speed with 5000 revolutions / minute, temporally thereafter again within 45 seconds steadily decreased to the upper speed with a value of 700 revolutions / minute and finally within less than a second or a few seconds suddenly from the upper speed with 7 00 revolutions / minute can be reduced to a lower speed of preferably 0 revolutions / minute.

One aspect of the invention is that between the upper speed and the lower speed there is an average speed which is in a speed range between 100 and 400 revolutions / minute. It is preferably provided that this average speed is maintained for a period of at least 20 seconds, preferably up to 200 seconds, at the end of the cleaning process. This improves the rinsing of the cooking space floor.

As an alternative or in addition, it is possible that the phase of maintaining the medium speed is also inserted during the cleaning process at regular or irregular intervals between the usual cycles. With this intermediate rinse, the holding time can also be shorter and, for example, have a duration between 5 seconds and 30 seconds.

In addition to the aforementioned controls of the rotational speed of the distributor disk, that is to say the rotational speed of the distributor disk, over time, it is also conceivable that the Pump is switched on and off in a predetermined manner in order to further improve the mechanical cleaning of the cooking chamber walls by means of the cleaning liquid.

One aspect of the invention is that the lower speed is maintained for a period of at least 1 second, preferably at least 2.5 seconds, and up to 10 seconds before the distributor disk is accelerated again to a medium speed or upper speed or maximum speed .

A particularly advantageous further development of the method provides that the distribution system is operated in such a way that cleaning liquid from the distribution system is applied directly to the side walls of the cooking space and the cooking space floor and / or the side walls of the cooking space and the top of the cooking space during the cleaning process, preferably that a rotational speed of the rotating bolt is matched to the diameter D of the base plate in such a way that the lateral cooking chamber walls and the cooking chamber floor and / or the lateral cooking chamber walls and the cooking chamber ceiling are essentially completely exposed to cleaning liquid by means of the distributor disk. This enables thorough cleaning of essentially all areas of the cooking chamber that are susceptible to soiling. By means of the preferred embodiment of this development, a thorough cleaning of essentially the entire cooking space is implemented in a structurally and control-technically simple manner.

A further advantageous development of the method provides that the at least one cleaning cycle is designed as a plurality of cleaning cycles and a predetermined period of time is provided between two directly consecutive cleaning cycles in which the rotational speed of the distributor disk is reduced to a lower speed of less than 10 Revolutions / minute, preferably reduced to zero, preferably that the aforementioned period of time is provided after each individual cleaning cycle or after a predetermined number of cleaning cycles following one another in time. In this way, it is possible to clean a region of the cooking chamber that is arranged essentially vertically below the distributor disk in a simple manner in terms of construction and circuitry. This is particularly advantageous if the distributor disk is arranged essentially vertically above the drain arranged in the cooking space floor of the cooking space, since the drain, which is prone to clogging, can thus be cleaned in a particularly simple manner. The aforementioned period can be, for example, a period of 5 seconds. For example, cleaning of the drain is implemented in a structurally particularly simple manner in that the cleaning liquid can be directed from the distributor system onto the drain due to gravity.

Another advantageous development of the method provides that, after automatic detection of a blockage in the drain and / or in a previously determined manner At intervals during the cleaning process, the circulation system is operated in a backwashing state in such a way that the cleaning liquid is conveyed through the drain against a direction of circulation of the circulation system, preferably that the pump conveys the cleaning liquid through the drain against the direction of circulation of the circulation system during the backwashing state, or that the The pump is switched off during the backwashing state in such a way that the cleaning liquid is conveyed through the drain by means of gravity against the direction of circulation of the circulation system. This makes it possible to automatically clear the clogging of the drain or prevent it as far as possible. The automatic detection of a blockage in the drain is possible, for example, through the power consumption of the pump or by monitoring the speed of the pump. However, other measures known to the person skilled in the art for the automatic detection of blockages are also possible. As an example, only cameras for observing the cooking chamber or flow meters in the drain line should be pointed out here.

By using a sieve in the fluid circuit, blockages only occur between the cooking space and the sieve. The sieve is preferably arranged in front of a pump and / or in front of a valve. In order to automatically eliminate or largely prevent a clogging of the sieve, another advantageous development of the method provides that, after automatic detection of a clogging of the sieve and / or at predetermined time intervals during the cleaning process, the circulation system is operated in a backwashing state, that the cleaning liquid is conveyed through the sieve against a direction of circulation of the circulation system.

According to one embodiment variant, the sieve is arranged in the area of the drain and / or the drain line.

A further advantageous development of the method provides that the respective time period between the previously defined time intervals is automatically defined as a function of the cleaning process. This enables the drain to be backwashed as required, depending on the respective cleaning process.

The terms speed of rotation and angular speed are synonymous and, based on a complete revolution, to be equated with the specification of speed.

• die erste Zwischendrehzahl in einem Bereich zwischen 900 und 2000 Umdrehungen/Minute liegt und/oder kleiner ist als die zweite Zwischendrehzahl;
• die zweite Zwischendrehzahl in einem Bereich zwischen 1000 und 3000 Umdrehungen/Minute liegt und/oder kleiner ist als die maximale Drehzahl;
• die maximale Drehzahl in einem Bereich zwischen 3000 und 9000 Umdrehungen/Minute liegt. Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt

  Figur 1

  ein erstes Ausführungsbeispiel des Gargeräts in einer geschnittenen Seitenansicht, in teilweiser Darstellung, in dem Umwälzbetrieb,

  Figur 2

  ein Ausführungsbeispiel des Verteilersystems für das Ausführungsbeispiel des Gargeräts gemäß der Fig. 1 mit der Verteilerscheibe in einer geschnittenen Seitenansicht, in teilweiser Darstellung,

  Figur 3

  das Ausführungsbeispiel aus Fig. 2 in einer weiteren geschnittenen Seitenansicht, in teilweiser Darstellung,

  Figur 4

  das Ausführungsbeispiel der Verteilerscheibe aus Fig. 2 und 3 in einer perspektivischen Ansicht,

  Figur 5

  das Ausführungsbeispiel der Verteilerscheibe aus den Fig. 2 bis 4 in einer weiteren perspektivischen Ansicht,

  Figur 6

  das Ausführungsbeispiel der Verteilerscheibe aus den Fig. 2 bis 5 in einer Seitenansicht,

  Figur 7

  das Ausführungsbeispiel des Verteilersystems aus Fig. 2 in einer Seitenansicht,

  Figur 8

  das Ausführungsbeispiel des Verteilersystems aus Fig. 2 in einer teilweise geschnittenen Seitenansicht,

  Figur 9

  ein erstes Drehzahl-Zeit-Diagramm zu dem Ausführungsbeispiel aus Fig. 1,

  Figur 10

  ein zweites Drehzahl-Zeit-Diagramm zu dem Ausführungsbeispiel aus Fig. 1,

  Figur 11

  ein drittes Drehzahl-Zeit-Diagramm zu dem Ausführungsbeispiel aus Fig. 1,

  Figur 12

  das Ausführungsbeispiel aus Fig. 1 in einer weiteren geschnittenen Seitenansicht, in teilweiser Darstellung, in dem Rückspülzustand des Umwälzsystems,

  Figur 13

  das Ausführungsbeispiel aus Fig. 1 in analoger Darstellung zur Fig. 1, mit Hervorhebung des bei verstopften Ablauf mit Wasser gefüllten Bereichs des Umwälzsystems und

  Figur 14

  ein zweites Ausführungsbeispiel des Gargeräts in einer geschnittenen Seitenansicht, in teilweiser Darstellung, in dem Bypassbetrieb.

The different speed ranges are structured in such a way that
the lower speed is in a range between 0 and 10 revolutions / minute and / or is less than the mean speed;
the mean speed is in a range between 100 and 400 revolutions / minute and / or is less than the upper speed;
the upper speed is in a range between 400 and 900 revolutions / minute and / or is lower than the first intermediate speed:

• the first intermediate speed is in a range between 900 and 2000 revolutions / minute and / or is less than the second intermediate speed;
• the second intermediate speed is in a range between 1000 and 3000 revolutions / minute and / or is less than the maximum speed;
• the maximum speed is in a range between 3000 and 9000 revolutions / minute. An embodiment of the invention is shown purely schematically in the drawings and is described in more detail below. It shows

  Figure 1

  a first embodiment of the cooking device in a sectional side view, in partial representation, in the circulation mode,

  Figure 2

  an embodiment of the distribution system for the embodiment of the cooking device according to FIG Fig. 1 with the distributor disc in a sectional side view, in partial representation,

  Figure 3

  the embodiment Fig. 2 in another sectional side view, in partial representation,

  Figure 4

  the embodiment of the distributor disc Fig. 2 and 3 in a perspective view,

  Figure 5

  the embodiment of the distributor disc from the Figs. 2 to 4 in another perspective view,

  Figure 6

  the embodiment of the distributor disc from the Figures 2 to 5 in a side view,

  Figure 7

  the embodiment of the distribution system Fig. 2 in a side view,

  Figure 8

  the embodiment of the distribution system Fig. 2 in a partially sectioned side view,

  Figure 9

  a first speed-time diagram for the embodiment Fig. 1 ,

  Figure 10

  a second speed-time diagram for the exemplary embodiment Fig. 1 ,

  Figure 11

  a third speed-time diagram for the exemplary embodiment Fig. 1 ,

  Figure 12

  the embodiment Fig. 1 in a further sectional side view, in partial representation, in the backwash state of the circulation system,

  Figure 13

  the embodiment Fig. 1 in a representation analogous to Fig. 1 , with highlighting of the area of the circulation system that is filled with water when the drain is blocked and

  Figure 14

  a second embodiment of the cooking device in a sectional side view, in partial representation, in the bypass mode.

In Fig. 1 a first embodiment of the cooking device is partially shown. The cooking device 2 is designed as a steam cooker and comprises a cooking space 4 with a cooking space floor 6, a cooking space ceiling 8 and lateral cooking space walls 10 as cooking space walls, a distribution system 12 for a cleaning liquid, not shown and designed as water, for cleaning the cooking space 4 and a circulation system 14 for Circulation of the cleaning liquid with a pump 16, a drain line 18 and an inlet line 20, the pump 16 by means of the drain line 18 being flow-guiding to an outlet 22 of the cooking chamber 4 arranged in the cooking chamber floor 6 of the cooking chamber 4 and by means of the inlet line 20 being being flow-guiding to an inlet opening 24 of the distribution system 12 is connected, the distribution system 12 having a distribution disk 26 with a pivot pin 28 for the torque-transmitting connection to a shaft, not shown, of the cooking appliance 2. See the Fig. 2 . In the present exemplary embodiment, the cleaning liquid is stored in a storage container 30, which is connected in a flow-conducting manner to the pump 16 of the circulation system 14 in a manner not shown, in order to fill the circulation system 14 with cleaning liquid. The distribution system 12 is in the Figures 2 to 8 shown in more detail.

The distributor system 12 comprises a distributor housing 32 and the distributor disk 26 which is rotatably arranged in the distributor housing 32 relative to the distributor housing 32, the distributor housing 32 having the inlet opening 24 for supplying the distributor disk 26 with cleaning fluid and surrounding the distributor disk 26 in such a way that between the distributor housing 32 and the distributor disk 26 has an annular space 34 with a circumferential outlet opening 36 for the cleaning liquid. As from the Fig. 2 , 3 , 7 and 8 As can be seen, the distributor disk 26 is only partially arranged in the distributor housing 32.

A line axis oriented parallel to the direction of flow of the cleaning liquid in the feed line 20 and / or the surface normal of the cross section of the feed opening 24 is oriented radially to the axis of rotation 38 of the distributor disk. As a result, the flow of the cleaning liquid emerging from the inlet opening 24 is oriented radially to the axis of rotation 38 of the distributor disk and hits the pivot pin 28 precisely. This configuration enables a particularly homogeneous distribution of the cleaning liquid in the annular space.

The axis of rotation 38 of the distributor disk can also be referred to as the longitudinal axis 38 of the pivot pin 28.

The distributor disk 26 dips with a side facing the distributor housing 32 in the assembled position through the cooking chamber wall 8, which is designed as a cooking chamber ceiling, into the annular chamber 34 of the distributor system 12. This makes it possible to supply the distributor disk 26 particularly well with water. This design also makes it possible to minimize the space required in the cooking space 4 and / or to enable more uniform wetting of the cooking space walls delimiting the cooking space 4, namely the cooking space floor 6, the cooking space ceiling 8 and the side cooking space walls 10.

The distributor disk 26 of the distributor system 12 comprises the pivot pin 28 for the torque-transmitting connection to the shaft of the cooking appliance 2 (not shown), a base plate 40 arranged on the pivot pin 28 essentially perpendicular to a longitudinal axis 38 of the pivot pin 28, and four between the pivot pin 28 and the base plate 40 symmetrically arranged wings 42, with a chamber 44 delimited by the pivot pin 28, the base plate 40 and these two wings 42 being formed between directly adjacent wings 42. The wings 42 are identical to one another, each of the wings 42 enclosing an acute angle with the longitudinal axis 38 of the pivot pin 28. See in particular the Figs. 3 and 4 . In the present exemplary embodiment, each of the wings 42 has, starting from the base plate 40, a first wing section 42a and a second wing section 42b adjoining the first wing section 42a in the direction of a free end of the wing 42, the first wing section 42a integrating with the base plate 40 Angle α of 75 ° and the second wing section 42b encloses an angle β of 85 ° with the base plate 40. See the Figures 3 to 8 , especially the Fig. 6 .

Furthermore, each of the wings 42 extends essentially as far as a free end of the base plate 40 and as far as a free end of the pivot pin 28, the respective wing 42 having an L-shape. See in particular the Fig. 2 and 4 to 6 . The pivot pin 28 has an outer diameter d of 8 mm and each of the L-shaped wings 42 has a height h of 6 mm at its free end associated with the base plate 40 and a height H of 22 mm at its free end associated with the pivot pin 28. The base plate 40 of the distributor disk 26 has a circular diameter D of 50 mm. The distributor disk 26 is made of steel. Alternatively, it is conceivable that the distributor disk is made of plastic or ceramic or glass. In order to protect a distributor disk made of plastic from undesired temperature stress, the distributor disk can have a coating, for example made of aluminum, on the side facing the cooking space floor. It is also possible that the Distributor disk is made from a combination of the above materials. For example, the distributor disk can consist of a metal and be coated with plastic and / or ceramic or glass.

The diameter D of the base plate 40 is designed to be matched to a rotational speed of the rotary bolt 28 such that the entire cooking space 4 can be supplied with cleaning liquid by means of the distributor disk 26. Furthermore, the diameter D of the base plate 40 is selected to be so large that the base plate 40 of the distributor disk 26 covers the outlet opening 36 in the cooking chamber ceiling 8 with a view from the cooking chamber 4 perpendicular to the base plate 40.

In the present exemplary embodiment, the distributor housing 32 is arranged outside the cooking chamber 4, the distributor disk 26 on the one hand dipping with a side of the distributor disk 26 facing the distributor housing 32 through the outlet opening 36 in the cooking chamber ceiling 8 of the cooking chamber 4 into the distributor housing 32 and, on the other hand, with a side of the distributor disk 26 facing the cooking chamber 4 with the base plate 40 protrudes through the outlet opening 36 into the cooking chamber 4. This makes it possible to supply the distributor disk 26 particularly well with water. This embodiment also makes it possible for the space requirement for the distribution system 12 in the cooking space 4 to be minimized and for a more uniform wetting of the cooking space walls delimiting the cooking space 4, namely the cooking space floor 6, the cooking space ceiling 8 and the side cooking space walls 10.

In the present exemplary embodiment, the distribution system 12 has an electric drive 45 connected to the pivot pin 28 of the distribution system 12 in a torque-transmitting manner by means of the shaft (not shown). See in particular the Figures 7 and 8 . Furthermore, the distribution system 12 is arranged approximately centrally on the cooking space ceiling 8 of the cooking space 4 and essentially vertically above the drain 22, the distribution system 12 being positioned between the cooking space ceiling 8 and a cooking space heating element (not shown) attached to the cooking space ceiling 8. See the Fig 1 and 12 to 14 . In addition, the inlet opening 24 and the distributor disk 26 of the distributor system 12 are designed and arranged in relation to one another in such a way that the distributor disk 26 can be driven by means of the cleaning fluid.

In the present exemplary embodiment, the pump 16 of the circulation system 14 is designed as a reversible pump, the pump 16 being designed and arranged in such a way that when the pump 16 is switched off, a gravity-related backflow of the cleaning fluid from the inlet line 20, the pump 16 and the drain line 20 in the direction of the drain 22 is made possible. That is, opposite to the direction of circulation of the circulation system 14 symbolized by the arrows 46.

The mode of operation of the cooking appliance with the distribution system which has the distribution disk and the method according to the present first exemplary embodiment are described below with reference to FIG Figures 1 to 13 explained in more detail.

In order to clean the cooking space 4 of the cooking device 2 by means of the cleaning liquid, a cleaning process is initiated in the cooking device 2 in a manner known to a person skilled in the art, for example manually via an operating unit (not shown) or automatically as an automatic program. The distributor disk 26 is supplied with cleaning fluid during the cleaning process by means of the inlet line 20 and the inlet opening 24, a rotational speed of the distributor disk 26 of the distributor system 12 being varied as a function of a previously defined cleaning program stored in a control of the cooking appliance 2, not shown. The cleaning program is designed such that at the beginning of each of three cleaning cycles the distributor disk 26 is operated at a maximum rotational speed of the cleaning cycle and the rotational speed is reduced after a predetermined period of time. See the Fig. 9 , in which the above-mentioned cleaning process with a total of three cleaning cycles is shown as an example in a speed-time diagram.

As can be seen from this, each cleaning cycle begins with a maximum rotational speed which is the same for all three cleaning cycles. It is started with the maximum speed in order to overcome any increased inertia. This increased inertia can result from sticking or contamination of the axis of rotation. Due to the maximum speed, the highest torque is set at the beginning of the cleaning cycle, which counteracts the stuck axis of rotation or loosens an axis of rotation that is already stuck. After that, the speed of rotation for each cleaning cycle initially decreases steadily, then increases briefly, and then decreases steadily again. Shortly before the end of the respective cleaning cycle, the rotational speed of the distributor disk 26 is reduced to 0 m / s, that is to say to 0 revolutions / minute. In the present exemplary embodiment, each of the three cleaning cycles lasts 50 s, the maximum speed per cleaning cycle being 5000 revolutions per minute here. However, the individual cleaning cycle can also be shorter or longer. For example, the aforementioned reduction can take place in stages as follows: a reduction from the maximum speed of 5000 revolutions / minute to a first intermediate speed of 1000 revolutions / minute within a period of 30 seconds, followed by a sudden increase in speed from the first intermediate speed of 1000 Revolutions / minute to a second intermediate speed of 1500 revolutions / minute within less than a second or a few seconds, followed by a reduction in speed from the second intermediate speed of 1500 revolutions / minute to one upper speed of 700 revolutions / minute in a period of about 60 seconds and finally a sudden drop in the upper speed of 700 revolutions / minute to a lower speed of 0 revolutions / minute within less than a second or a few seconds. See also the Fig. 9 . The direction of rotation of the distributor disk 26 around the longitudinal axis 38 is determined in such a way that, during the cleaning process, in particular the lateral cooking chamber walls 10 and the cooking chamber floor 6 are directly exposed to cleaning fluid from the distributor system 12.

In principle, however, the at least one cleaning cycle stored in the cleaning program can be freely selected within wide, suitable limits.

For example, the individual cleaning cycle of the cleaning program and thus the method according to the invention according to the one in FIG Fig. 10 The speed-time diagram shown may be modified. Analogous to the variant according to Fig. 9 each of the three cleaning cycles is also designed identically here. As from the Fig. 10 As can be seen, the rotational speed, that is to say the rotational speed, of the distributor disk 26 at the beginning of each cleaning cycle is 5000 revolutions / minute as above. After that, the speed of the distributor disk 26 is gradually reduced overall, the speed of the distributor disk 26 being increased four times in the first 30 seconds after the start of the respective cleaning cycle and reduced again immediately after the respective increase, the speed of the distributor disk 26 takes place at each of the aforementioned increases to a speed below the maximum speed of 5000 revolutions / minute. The speed, which is increased several times abruptly in this way, continuously decreases from the first increase in speed to the fourth increase in speed. See the Fig. 10 . After the fourth increase, the speed of the distributor disk 26 is reduced to 700 revolutions / minute over a period of 60 seconds. At the end of the respective cleaning cycle, the speed of the distributor disk 26 is finally suddenly reduced to 0 revolutions / minute within less than a second or a few seconds.

In the Fig. 11 a further variant of the method is shown as an example, according to which the at least one cleaning cycle in the Fig. 11 The speed-time diagram shown has a sawtooth-like profile. In this way, the application of the cleaning liquid to the cooking space walls, namely the cooking space floor 6, the cooking space ceiling 8 and the side cooking space walls 10, is embodied in a pulsating manner during the entire cleaning cycle. For example, the maximum speed of the distributor disk 26 at the beginning of a cleaning cycle, analogous to the above, can be 5000 revolutions / minute and then continuously reduced to an upper speed of 700 revolutions / minute within 45 seconds, subsequently within 45 seconds again steadily increased from 700 revolutions / minute to the maximum speed of 5000 revolutions / minute, temporally thereafter again within 45 seconds steadily decreased to the upper speed with a value of 700 revolutions / minute, temporally afterwards again steadily from the within 45 seconds The upper speed is increased from 700 revolutions / minute to the maximum speed of 5000 revolutions / minute, after which it is continuously reduced again within 45 seconds to the upper speed with a value of 700 revolutions / minute and finally abruptly within less than a second or a few seconds the upper speed with 700 revolutions / minute can be reduced to the lower speed with less than 10 revolutions / minute, in this example with 0 revolutions / minute. In addition to the aforementioned control of the speed over time, this variant of the method provides that the pump 16 is also switched on and off in a predetermined manner in order to mechanically clean the cooking space walls, i.e. the cooking space floor 6, the cooking space ceiling 8 and the side walls of the cooking space 10, to be further improved by means of the cleaning liquid. As from the Fig. 11 Furthermore, it can be seen that the cleaning program can also have fewer or more than three cleaning cycles. This applies in general and is not restricted to the specific embodiment of the method. Furthermore, it can be provided in embodiments of the method that, in the case of a plurality of cleaning cycles, only the first cleaning cycle begins this cleaning cycle at the maximum speed of the distributor disk, that is to say the maximum rotational speed of the distributor disk. See also the Fig. 11 .

In the cleaning program it can also be provided that the direction of rotation of the distributor disk 26 about the longitudinal axis 38 is temporarily reversed so that cleaning fluid from the distributor system 12 is applied directly to the side cooking chamber walls 10 and the cooking chamber ceiling 8 during the cleaning process. In the aforementioned reversal of the direction of rotation of the distributor disk 26, the cleaning liquid is guided in the direction of the cooking chamber ceiling 8 by means of the inclined blades 42. The rotational speed of the shaft transmitting torque with the pivot pin 28 and thus of the pivot pin 28 is matched to the diameter D of the base plate 40 in such a way that the lateral cooking chamber walls 10 and the cooking chamber floor 6 as well as the lateral cooking chamber walls 10 and the cooking chamber ceiling 8 essentially completely exposed to cleaning fluid.

In all three of the aforementioned variants of the method according to Figures 9 to 11 it is provided that between two cleaning cycles that follow one another in time, a predetermined period of time is provided in which the rotational speed, i.e. the rotational speed, of the distributor disk 26 is reduced to zero, namely that the aforementioned period of time is provided after each individual cleaning cycle. To this In this way, it is possible to clean the region of the cooking chamber 4 arranged vertically below the distributor disk 26 in a simple manner in terms of construction and circuitry. This is particularly advantageous because the distributor disk 26 is arranged vertically above the drain 22 arranged in the cooking space floor 6 of the cooking space 4, since the drain 22, which is prone to clogging, can thus be cleaned in a particularly simple manner. The aforementioned period of time can be, for example, a period of 5 seconds. For example, the cleaning of the drain 22 is implemented in a structurally particularly simple manner in that the cleaning liquid can be conducted from the distribution system 12 directly onto the drain 22 due to the force of gravity.

Should the drain 22 become clogged with solids during the cleaning process, the circulating system 14 is automatically operated in a backwashing state, the cleaning liquid being conveyed through the drain 22 counter to the circulating direction 46 of the circulating system 14. A blockage can be automatically detected, for example, by means of the power consumption of the pump 16 or a speed monitoring of the pump 16. However, other measures known to the person skilled in the art for the automatic detection of blockages are also possible. As an example, only cameras for observing the cooking chamber or flow meters in the drain line should be pointed out here. However, it is also conceivable that the circulation system 14 is operated in the backwashing state at predetermined time intervals in order to avoid clogging of the drain 22 as far as possible. The respective time period between the previously defined time intervals is automatically defined, for example, as a function of the cleaning process.

In the present exemplary embodiment, the pump 16 conveys the cleaning liquid counter to the direction of circulation 46 of the circulation system 14 through the outlet 22 during the backwashing state Fig. 12 . This is possible because the pump 16 is designed as a reversible pump. The conveyance of the cleaning liquid counter to the direction of circulation 46 is in the Fig. 12 symbolized by arrows 48.

However, backwashing of the drain 22 is also possible in other ways.

For example, in that the pump 16 is switched off during the backwashing state in such a way that the cleaning liquid is conveyed through the drain 22 by means of gravity against the direction of circulation 46 of the circulation system 14. See the Fig. 12 and 13th . In Fig. 13 the area of the inlet line 20, the pump 16 and the outlet line 18, which is filled with cleaning fluid when the outlet 22 is clogged, is highlighted by means of a dash-dotted frame 50. Since the pump 16 in the present embodiment allows a gravity-related backflow of the cleaning liquid, this type of backwashing is also possible.

In the Fig. 14 a second embodiment of the cooking device is shown. The second exemplary embodiment is largely identical to the first exemplary embodiment, so that only the differences are explained below. Otherwise, reference is made to the above explanations regarding the first exemplary embodiment. Identical or identically acting components are denoted by the same reference symbols.

In the second exemplary embodiment of the cooking appliance, the inlet line 20 is additionally connected to the outlet 22 in a flow-conducting manner by means of a bypass line 52 of the circulation system 14, the bypass line 52 being lockable in a non-bypass mode by means of at least one valve 54. During the backwashing state, the inlet line 20 is connected directly to the outlet 22 by means of the bypass line 52 in a flow-conducting manner, so that the cleaning liquid in the in the Fig. 14 Bypass operation shown is conveyed by means of gravity counter to the direction of circulation of the circulation system 14, namely in the direction of the arrows 48, through the outlet 22.

The invention is not limited to the present exemplary embodiments.

For example, the invention can also be used advantageously in other types of cooking appliances with cooking spaces. It is also conceivable that the cooking appliance has a steam generator, the steam generator being connectable to the drain in a steam cleaning mode by means of a steam line and the steam line being lockable in a non-steam cleaning mode by means of at least one valve. This enables a highly efficient cleaning of the drain as an alternative to the use of the cleaning liquid. The steam line can include the inlet line and the outlet line or the outlet line, wherein the inlet line or the outlet line can be blocked in the steam cleaning mode by means of at least one valve in such a way that no steam escapes from the inlet opening of the distribution system. In this way, on the one hand, the inlet line and the outlet line or the outlet line can be used for the conduction of the steam from the steam generator to the outlet, so that the need for an additional steam line is minimized. In addition, the steam can be used not only to clean the drain, but also to clean and sterilize the feed line and the drain line or the drain line. Correspondingly, a further embodiment of the method provides that the steam generator is connected to the drain during the steam cleaning operation by means of the steam line indirectly, by means of the inlet line and the drain line or the drain line, or directly in a flow-guiding manner, so that steam generated by the steam generator flows through the drain is promoted.

In contrast to the exemplary embodiments explained, it is also possible that the inlet opening and the distributor disk of the distributor system are designed and arranged in relation to one another in such a way that the distributor disk can only be driven by means of the cleaning fluid.

By using a sieve in the fluid circuit, i.e. in the circulation system, blockages only occur between the cooking space and the sieve. The sieve is preferably arranged in front of the pump and / or in front of a valve of the circulation system. In order to automatically eliminate or largely prevent a clogging of the sieve, another advantageous development of the method provides that, after automatic detection of a clogging of the sieve and / or at predetermined time intervals during the cleaning process, the circulation system is operated in a backwashing state, that the cleaning liquid is conveyed through the sieve against a direction of circulation of the circulation system.

According to one embodiment variant, the sieve is arranged in the area of the drain and / or the drain line.

A further advantageous development of the method provides that the respective time period between the previously defined time intervals is automatically defined as a function of the cleaning process. This enables the drain to be backwashed as required, depending on the respective cleaning process.

Claims (17)

Cooking appliance (2), comprising
a wave
a cooking space (4),
a distribution system (12) for a cleaning liquid for cleaning the cooking space (4) and
a circulation system (14) for circulating the cleaning liquid with a pump (16), a drain line (18) and an inlet line (20),
wherein the pump (16) conducts flow by means of the drain line (18) to an outlet (22) of the cooking chamber (4) arranged in a cooking chamber floor (6) of the cooking chamber (4) and by means of the inlet line (20) conducts flow to an inlet opening (24) the distribution system (12) is connected,
and wherein the distributor system (12) has a distributor disk (26) with a pivot pin (28) for the torque-transmitting connection to the shaft, particularly preferably that the distributor system (12) is designed according to claim 4
characterized in that
the distributor housing (32) is arranged outside the cooking chamber (4) and the distributor disk (26) on the one hand with a side of the distributor disk (26) facing the distributor housing (32) through an opening (36) in a cooking chamber wall (8) of the cooking chamber ( 4) dips into the distributor housing (32) and, on the other hand, protrudes with a side of the distributor disk (26) facing the cooking chamber (4) with the base plate (40) through the opening (36) into the cooking chamber (4). Cooking device (2) according to Claim 1, characterized in that the distribution system (12) is designed for cleaning the cooking space (4) of the cooking device (2) with a cleaning liquid, the distribution system (12) comprising
a distributor housing (32) and
a distributor disk (26), preferably only partially arranged in the distributor housing (32) so as to be rotatable relative to the distributor housing (32),
wherein the distributor housing (32) has an inlet opening (24) for supplying the distributor disk (26) with cleaning fluid and surrounds the distributor disk (26) in such a way that between the distributor housing (32) and the distributor disk (26) an annular space (34) with a circumferential outlet opening (36) is formed for the cleaning liquid. Cooking appliance (2) according to Claim 2, characterized in that the distributor disc (26) has
a pivot pin (28) for the torque-transmitting connection to a shaft of the cooking appliance (2),
a base plate (40) arranged on the pivot pin (28) essentially perpendicular to a longitudinal axis (38) of the pivot pin (28)
and at least three, preferably four, symmetrically arranged wings (42) between the pivot pin (28) and the base plate (40),
a chamber (44) delimited by the pivot pin (28), the base plate (40) and these two wings (42) being formed between directly adjacent wings (42). Cooking appliance (2) according to claim 3, characterized in that each of the wings (42) forms an acute angle with the longitudinal axis (38) of the pivot pin (28), preferably that each of the wings (42) starting from the base plate (40) a first wing section (42a) and a second wing section (42b) adjoining the first wing section (42a) in the direction of a free end of the wing (42), the first wing section (42a) forming an angle α with the base plate (40) of 75 ° and the second wing section (42b) encloses an angle β of 85 ° with the base plate (40). Cooking appliance (2) according to claim 3 or 4, characterized in that each of the wings (42) extends substantially to a free end of the base plate (40) and to a free end of the pivot pin (28), the respective wing (42) has an L-shape, preferably that the base plate (40) has a diameter D of 50 mm and / or the pivot pin (28) has an outer diameter d of 8 mm and / or each of the L-shaped wing (42) at its free end assigned to the base plate (40) has a height h of 6 mm and at its free end assigned to the pivot pin (28) has a height H of 22 mm, particularly preferred that the diameter D of The base plate (40) is designed in such a way that it is adapted to a rotational speed of the pivot pin (28) that the cleaning fluid can be applied to essentially the entire cooking space (4) by means of the distributor disk (26). Cooking appliance (2) according to one of the preceding claims, characterized in that the distributor disk (26) is designed and arranged in the cooking space (4) in such a way that the base plate (40) of the distributor disk (26) has the opening (36) in the cooking space wall (8) with a view from the cooking space (4) perpendicular to the base plate (40) essentially covered. Cooking appliance (2) according to one of the preceding claims, characterized in that the feed line (20) is additionally connected to the drain (22) in a flow-conducting manner by means of a bypass line (52) of the circulation system (14), the bypass line (52) in a non-bypass mode can be blocked by means of at least one valve (54). Cooking device according to one of the preceding claims, characterized in that the cooking device has a steam generator, the steam generator being connectable to the drain in a steam cleaning mode by means of a steam line and the steam line being lockable in a non-steam cleaning mode by means of at least one valve. Cooking appliance according to claim 8, characterized in that the steam line comprises the inlet line and the outlet line or the outlet line, wherein the inlet line or the outlet line can be blocked in the steam cleaning mode by means of at least one valve in such a way that no steam escapes from the inlet opening of the distributor system. Method for cleaning a cooking space (4) of a cooking appliance (2) by means of a cleaning liquid during a cleaning process with at least one cleaning cycle,
wherein the cooking appliance (2) is designed according to one of claims 1 to 9 and the method has the following method steps: - Supplying the distributor disk (26) with cleaning liquid by means of the feed line (20) and the feed opening (24); - Variation of a rotational speed of the distributor disk (26) of the distributor system (12) as a function of a previously defined cleaning program stored in a control of the cooking appliance (2). Method according to claim 10, characterized in that the cleaning program is designed such that at the beginning of the at least one cleaning cycle the distributor disk (26) is operated at a maximum rotational speed of the cleaning cycle and the rotational speed is reduced after a predetermined period of time. Method according to claim 11, characterized in that in at least one of the at least one cleaning cycle after the maximum rotational speed of the distributor disk (26) at least one sudden increase, preferably a plurality of sudden increases, of the rotational speed of the distributor disk (26) takes place, with in each case a sudden increase in each case is directly followed in time by a decrease in the rotational speed. Method according to one of Claims 10 to 12, characterized in that the at least one cleaning cycle has a sawtooth-like profile in a speed-time diagram. Method according to one of Claims 10 to 13, characterized in that the distribution system (12) is operated in such a way that, during the cleaning process, the cooking chamber walls (10) and the cooking chamber floor (6) and / or the cooking chamber walls (10) and the cooking chamber ceiling ( 8) cleaning fluid from the distributor system (12) can be applied directly, preferably that a speed of rotation of the pivot pin (28) is matched to the diameter D of the base plate (40) in such a way that, by means of the distributor disk (26), essentially the side walls of the cooking chamber ( 10) and the cooking space floor (6) and / or the side cooking space walls (10) and the cooking space ceiling (8) are essentially completely exposed to cleaning fluid. Method according to one of claims 10 to 14, characterized in that the at least one cleaning cycle is designed as a plurality of cleaning cycles and a predetermined time period is provided between two directly consecutive cleaning cycles in which the rotational speed of the distributor disc (26) is reduced to one lower speed, preferably reduced to zero, it is preferred that the aforementioned period of time is provided after each individual cleaning cycle or after a predetermined number of cleaning cycles following one another in time. Method according to one of claims 10 to 15, characterized in that after automatic detection of a blockage of the drain (22) and / or at predetermined time intervals during the cleaning process, the distributor disk (26) is kept immobile, so that the cleaning fluid is removed from the distributor disk (26) drips or flows directly onto the drain. Method according to one of claims 10 to 15, characterized in that the steam generator is connected to the drain during the steam cleaning operation by means of the steam line indirectly, by means of the inlet line and the drain line or the drain line, or directly in a flow-conducting manner, so that a steam generated by the steam generator is promoted by the process.

Images