EP3885656A2 - Disque de distribution pour un liquide de nettoyage, système de distribution, appareil de cuisson doté d'une chambre de cuisson et son procédé de nettoyage - Google Patents

Disque de distribution pour un liquide de nettoyage, système de distribution, appareil de cuisson doté d'une chambre de cuisson et son procédé de nettoyage Download PDF

Info

Publication number: EP3885656A2
Authority: EP; European Patent Office
Prior art keywords: cleaning; cooking; speed; distributor; drain
Prior art date: 2020-03-24
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP21161550.5A

Other languages

German (de)

English (en)

Other versions

EP3885656C0 (fr

EP3885656A3 (fr

EP3885656B1 (fr

Inventor

Tobias Kochmann

Andre Peters

Simon Gross

Timo Schridde

Ralf Ellersiek

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Miele und Cie KG

Original Assignee

Miele und Cie KG

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2020-03-24

Filing date

2021-03-09

Publication date

2021-09-29

2021-03-09 Application filed by Miele und Cie KG filed Critical Miele und Cie KG

2021-09-29 Publication of EP3885656A2 publication Critical patent/EP3885656A2/fr

2021-12-22 Publication of EP3885656A3 publication Critical patent/EP3885656A3/fr

2025-05-14 Application granted granted Critical

2025-05-14 Publication of EP3885656C0 publication Critical patent/EP3885656C0/fr

2025-05-14 Publication of EP3885656B1 publication Critical patent/EP3885656B1/fr

Status Active legal-status Critical Current

2041-03-09 Anticipated expiration legal-status Critical

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Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
- F24C14/005—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning using a cleaning liquid

Definitions

the invention relates to a distributor disk for a cleaning fluid, a distributor system for a cleaning fluid, a cooking device with a cooking chamber and a method for cleaning the cooking chamber with a cleaning fluid.
Such distributor disks, distributor systems, cooking appliances with cooking chambers and methods for cleaning them with a cleaning liquid are already known.
the cleaning liquid used is, for example, water from a fixed water connection or from a storage container of the cooking appliance.
the invention thus poses the problem of improving the cleaning of a cooking chamber of a cooking appliance with a cleaning liquid.
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.
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.
other cleaning fluids are also conceivable.
water from a fixed water connection or from a storage container of the cooking appliance could be mixed with a cleaning agent concentrate or the like to the cleaning liquid for cleaning the cooking space.
the distributor disk according to the invention is also fixed, detachable or connectable to the cooking appliance only for the purpose of cleaning the cooking space. Furthermore, the distributor disk according to the invention can be driven on the one hand with its own drive and on the other hand by the force of the cleaning fluid. According to the invention Distributor disk can be used advantageously for a large number of different applications.
the distributor disk is only partially arranged in the distributor housing.
the cooking device according to the invention also enables the cleaning liquid to be operated in circulation, so that less cleaning liquid is used and the cleaning is thus designed to be more efficient.
the method according to the invention also enables cleaning programs that differ from one another to be carried out for needs-based cleaning of the cooking space.
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.
the pump is designed as a reversible pump.
the cleaning liquid can be conveyed counter to a direction of circulation of the circulation system and thus backwashing of the drainage of the cooking chamber.
the intensity of the backwashing of the drain can also be controlled by means of the pump.
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.
an advantageous further development of the aforementioned embodiment of the method according to the invention provides that the pump conveys the cleaning liquid through the drain against the direction of circulation of the circulation system during the backwashing state.
the drain can be backwashed by means of the cleaning fluid, for example without additional lines or the like.
the pump is designed and arranged in such a way that in a switched-off state the pump is enabled to allow the cleaning fluid to flow back due to gravity. 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.
an advantageous development of the method according to the invention 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 according to the invention provides that the distributor housing is arranged outside the cooking space 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 is immersed in the distributor housing and on the other hand with one of the cooking chamber facing side of the distributor disc with the base plate protrudes through the opening into the cooking chamber. In this way it is possible to supply the distributor disc with water particularly well.
This design also makes it possible that the space required for the distribution system according to the invention in the cooking space is minimized and / or a more uniform wetting of the cooking space walls of the cooking space that delimits the cooking space, i.e. the cooking space floor, the cooking space ceiling and the side cooking space walls, is made possible.
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.
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 according to the invention 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.
the pivot pin and thus the distributor disk can be driven independently of the supply of cleaning fluid.
the trajectory of the cleaning fluid can be determined set independently of the amount of cleaning fluid supplied to the distributor disc.
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.
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.
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.
a particularly advantageous development of the cooking appliance according to the invention provides that the distribution system is arranged approximately in the middle of a cooking chamber wall of the cooking chamber designed as a cooking chamber ceiling, preferably that the distributor system is arranged essentially vertically above the drain.
a particularly favorable arrangement of the distribution system relative to the cooking space of the cooking appliance is selected as a result, 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 distributor system according to the invention without additional construction or circuitry outlay.
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.
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.
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 disk in a dripping or flowing manner when it hits the drain or a sieve of the drain has sufficient kinetic energy to remove the accumulated there To comminute suspended matter and thus automatically eliminate and / or prevent clogging of the sieve and / or the drain.
the inlet line is additionally connected to the drain 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.
an advantageous further development of the method according to the invention provides that the feed line is directly connected to the drain in a flow-conducting manner by means of the bypass line 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.
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.
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 Distribution system.
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.
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.
an advantageous development of the method according to the invention provides that the steam generator during the steam cleaning operation by means of the steam line indirectly, by means of the supply line and the Drain line or the drain line, or is connected directly to the drain in a flow-conducting manner, so that a steam generated by means of the steam generator is conveyed through the drain.
the cleaning program is designed such 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 according to the invention provides that in at least one of the at least one cleaning cycle, after a maximum rotational speed of the distributor disk in this cleaning cycle, at least one sudden increase, preferably a plurality of sudden increases, in the rotational speed of the distributor disk takes place a sudden increase in each case is immediately followed by a decrease in the rotational speed.
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.
the maximum speed of the distributor disk is preferably selected in a range from 3000 to 9000 revolutions per minute.
the maximum speed is reached within a period of 3 to 10 seconds, preferably in 7 seconds.
the selected maximum speed and / or the period of time for reaching the maximum speed enables a particularly wide, even distribution of the cleaning liquid on all surfaces of the cooking chamber.
the speed of rotation of the distributor disc is reduced again until it has reached an intermediate speed. This takes place in a period of 10 to 40 seconds, preferably in a period of 30 seconds. This reduction in the speed of rotation also contributes to uniform wetting of the cooking chamber surfaces with cleaning fluid.
the intermediate speed is in a range between 900 and 3000 revolutions per minute.
a first intermediate speed in a range between 900 and 2000 revolutions per minute and / or smaller than the second intermediate speed and a second intermediate speed in a range between 1000 and 3000 revolutions per minute and / or smaller than the maximum speed.
the rotational speed of the distributor disk is initially reduced to the first intermediate rotational speed.
One aspect is that after the first intermediate speed has been reached, the rotational speed of the distributor disk is increased to the second intermediate speed. This increase in the speed of rotation takes place preferably within a maximum of 5 seconds, preferably in less than 1 second.
the first intermediate speed has 1000 revolutions per minute and the second intermediate speed has 1500 revolutions per minute.
Such an impulse caused by a short-term increase in the speed of rotation enables dirt to be removed mechanically from the surface by kinetic forces of the cleaning fluid.
One aspect is that the maximum speed and / or the first intermediate speed and / or the second speed is not held or is only held for a few seconds, a maximum of 3 seconds.
Another aspect is that after the maximum speed, in particular after the intermediate speed or the intermediate speeds, the speed of rotation of the distributor disk is set to an upper speed.
the time until the upper speed is reached is preferably 30 to 100 seconds, in particular about 60 seconds. It is also possible that the upper speed is maintained for a period of up to 40 seconds.
the upper speed is in a range between 400 and 900 revolutions per minute, in particular at about 700 revolutions per minute, preferably smaller than the first intermediate speed and / or greater than a mean speed or than the lower speed.
the lower speed is in a range between 0 and 10 revolutions per minute, preferably less than the mean speed or the upper speed.
the mean speed in a range between 100 and 400 revolutions per minute, preferably less than the upper speed and / or greater than the lower speed.
the time span in which the lower speed is maintained is up to 10 seconds, preferably the duration of the time span of the lower speed is about 5 seconds.
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 a sudden drop in speed from the upper speed with 700 revolutions / minute to the lower speed with preferably 0 revolutions / minute within less than a second or a few seconds.
the at least one cleaning cycle stored in the cleaning program can be freely selected within wide, suitable limits.
the at least one cleaning cycle has a sawtooth-like profile in a speed-time diagram.
the cleaning liquid is applied to the cooking chamber walls in a pulsating manner during the entire cleaning cycle.
the maximum speed of the distributor disc at the beginning of a cleaning cycle can be 5000 revolutions / minute and then continuously reduced to a value of an upper speed of 700 revolutions / minute within 45 seconds, then continuously again within 45 seconds increased from 700 revolutions / minute to the maximum speed of 5000 revolutions / minute, then gradually decreased again within 45 seconds to a value of the upper speed of 700 revolutions / minute, subsequently again steadily from 700 revolutions / minute within 45 seconds the maximum speed increased to 5000 revolutions / minute, then gradually decreased again within 45 seconds to the upper speed with a value of 700 revolutions / minute and finally within less than 5 seconds, preferably in a period of less than one second, abruptly from 700 revolutions / Minute to a lower speed of w Lower than 10 revolutions / minute, preferably from 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.
the phase of maintaining the medium speed is also inserted during the cleaning process at regular or irregular intervals between the usual cycles.
the holding time can also be shorter and, for example, have a duration between 5 seconds and 30 seconds.
the pump is also switched on and off in a predetermined manner in order to continue the mechanical cleaning of the cooking chamber walls by means of the cleaning liquid to enhance.
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 development of the method according to the invention provides that the distribution system is operated in such a way that lateral Cooking space walls and the cooking space floor and / or the side cooking space walls and the cooking space ceiling are directly exposed to cleaning liquid from the distributor system, preferably that a speed of the pivot pin is matched to the diameter D of the base plate in such a way that the lateral cooking space walls and the The cooking space floor and / or the side cooking space walls and the cooking space ceiling are essentially completely exposed to cleaning liquid.
This enables thorough cleaning of essentially all areas of the cooking chamber that are susceptible to soiling.
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 according to the invention provides 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 disk is reduced to a lower speed of less than 10 revolutions / minute, preferably reduced to zero, preferably that the aforementioned time period is provided after each individual cleaning cycle or after a predetermined number of cleaning cycles following one another in time.
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 disk is reduced to a lower speed of less than 10 revolutions / minute, preferably reduced to zero, preferably that the aforementioned time period is provided after each individual cleaning cycle or after a predetermined number of cleaning cycles following one another in time.
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.
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 according to the invention provides that after automatic detection of a blockage of the drain and / or at predetermined time intervals during the cleaning process, the circulation system is operated in a backwashing state in such a way that the cleaning fluid is conveyed through the drain against a direction of circulation of the circulation system It is preferred that the pump conveys the cleaning liquid through the drain against the direction of circulation of the circulation system during the backwash condition or that the pump is switched off during the backwash condition in such a way that the cleaning fluid is conveyed through the drain against the direction of circulation of the circulation system by means of gravity. This makes it possible to automatically clear the clogging of the drain or to prevent as much 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.
other measures known to the person skilled in the art for the automatic detection of blockages are also possible.
only cameras for observing the cooking chamber or flow meters in the drain line should be pointed out here.
the sieve is preferably arranged in front of a pump and / or in front of a valve.
another advantageous development of the method according to the invention 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.
the sieve is arranged in the area of the drain and / or the drain line.
Another advantageous development of the method according to the invention 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.
speed of rotation and angular speed are synonymous and, based on a complete revolution, to be equated with the specification of speed.
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 less 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.
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) that is 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 supply 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.
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.
the distributor disk 26 is only partially arranged in the distributor housing 32.
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 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 Figures 3 to 6 .
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 ⁇ of 75 ° and the second wing section 42b encloses an angle ⁇ of 85 ° with the base plate 40. See the Figures 3 to 8 , especially the Fig. 6 .
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 4th until 6th .
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.
the distributor disk can have a coating, for example made of aluminum, on the side facing the cooking space floor. It is also possible for the distributor disk to be made from a combination of the aforementioned materials.
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 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.
the distributor housing 32 is arranged outside the cooking space 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.
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 .
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 12th until 14th .
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.
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 18 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.
a cleaning process is carried out in the cooking device 2 in a manner known to those skilled in the art, for example manually via an operating unit (not shown) or automatically as a Automatic program, initiated.
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.
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.
each of the three cleaning cycles lasts 50 s, the maximum speed per cleaning cycle being 5000 revolutions per minute here.
the individual cleaning cycle can also be shorter or longer.
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 an upper speed of 700 revolutions / minute in a period of about 60 seconds and finally a sudden drop 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.
the direction of rotation of the distributor disk 26 about the longitudinal axis 38 is set in such a way that, during the cleaning process, in particular the lateral cooking chamber walls 10 and the Cleaning liquid from the distribution system 12 can be applied directly to the cooking chamber floor 6.
the at least one cleaning cycle stored in the cleaning program can be freely selected within wide, suitable limits.
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.
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 .
the speed of the distributor disk 26 is reduced to 700 revolutions / minute over a period of 60 seconds.
the speed of the distributor disk 26 is finally suddenly reduced to 0 revolutions / minute within less than a second or a few seconds.
a further variant of the method according to the invention is shown by way of example, according to which the at least one cleaning cycle in the Fig. 11
the speed-time diagram shown has a sawtooth-like profile.
the application of the cleaning liquid to the cooking chamber walls, namely the cooking chamber floor 6, the cooking chamber ceiling 8 and the lateral cooking chamber walls 10 is designed to be pulsating during the entire cleaning cycle.
the maximum speed of the distributor disk 26 at the beginning of a cleaning cycle 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 steadily decreased within 45 seconds to a value of 700 revolutions / minute, temporally subsequently within 45 seconds again steadily from 700 revolutions / minute 5000 revolutions / minute increased, then again continuously within 45 seconds lowered to a value of 700 revolutions / minute and finally reduced suddenly within less than a second or a few seconds from 700 revolutions / minute to a lower speed of less than 10 revolutions / minute, preferably 0 revolutions / minute.
this variant of the method according to the invention also 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 fluid.
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 according to the invention.
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.
the cleaning liquid is guided in the direction of the cooking chamber ceiling 8 by means of the inclined blades 42.
the 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 are essentially completely exposed to cleaning fluid.
the aforementioned period of time can be, for example, a period of 5 seconds.
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.
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.
other measures known to the person skilled in the art for the automatic detection of blockages are also possible.
only cameras for observing the cooking chamber or flow meters in the drain line should be pointed out here.
the circulation system 14 is operated in the backwashing state at predetermined time intervals in order to avoid clogging of the drain 22 as much as possible.
the respective time period between the previously defined time intervals is automatically defined, for example, as a function of the cleaning process.
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 .
the conveyance of the cleaning liquid counter to the direction of circulation 46 is in the Fig. 12 symbolized by arrows 48.
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 .
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 exemplary embodiment enables a gravity-related backflow of the cleaning liquid, this type of backwashing is also possible.
a second embodiment of the cooking device according to the invention 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.
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.
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.
the invention can also be used advantageously in other types of cooking appliances with cooking spaces.
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.
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.
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.
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.
a further embodiment of the method according to the invention 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 supply line and the drain line or the drain line, or directly in a flow-guiding manner, so that a steam generated by the steam generator through the Process is promoted.
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.
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.
another advantageous development of the method according to the invention 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.
the sieve is arranged in the area of the drain and / or the drain line.
Another advantageous development of the method according to the invention 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.

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Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Chemical Kinetics & Catalysis (AREA)
Combustion & Propulsion (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Cleaning By Liquid Or Steam (AREA)
Food-Manufacturing Devices (AREA)
Cookers (AREA)
Commercial Cooking Devices (AREA)

EP21161550.5A 2020-03-24 2021-03-09 Procédé de nettoyage d'une cavité de cuisson Active EP3885656B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102020108021.2A DE102020108021A1 (de)	2020-03-24	2020-03-24	Verteilerscheibe für eine Reinigungsflüssigkeit, Verteilersystem, Gargerät mit einem Garraum und Verfahren zu dessen Reinigung

Publications (4)

Publication Number	Publication Date
EP3885656A2 true EP3885656A2 (fr)	2021-09-29
EP3885656A3 EP3885656A3 (fr)	2021-12-22
EP3885656C0 EP3885656C0 (fr)	2025-05-14
EP3885656B1 EP3885656B1 (fr)	2025-05-14

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EP21161550.5A Active EP3885656B1 (fr)	2020-03-24	2021-03-09	Procédé de nettoyage d'une cavité de cuisson

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EP (1)	EP3885656B1 (fr)
DE (1)	DE102020108021A1 (fr)
ES (1)	ES3035244T3 (fr)
PL (1)	PL3885656T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP4357676A1 (fr)	2022-10-19	2024-04-24	Miele & Cie. KG	Procédé d'élimination d'un liquide de nettoyage moussant d'un espace de cuisson d'un appareil de cuisson et appareil de cuisson
DE102023127406A1 (de)	2022-10-19	2024-04-25	Miele & Cie. Kg	Verfahren zum Entfernen einer schaumbildenden Reinigungsflüssigkeit aus einem Garraum eines Gargeräts und Gargerät

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DE202012104832U1 (de)	2012-12-12	2013-01-14	Kärcher Futuretech GmbH	Reinigungsdüse zum Reinigen eines Innenraums eines Gar- oder Kombidämpfgeräts
DE102014214350B3 (de)	2014-07-23	2015-09-10	BSH Hausgeräte GmbH	Haushaltsgerät mit einer Flüssigkeitsleitung
EP3334976B1 (fr) *	2015-08-11	2021-10-06	BSH Hausgeräte GmbH	Nettoyage d'une chambre de cuisson
DE102016100204A1 (de) *	2016-01-06	2017-07-06	Miele & Cie. Kg	Gargerät
DE102017100077A1 (de)	2017-01-04	2018-07-05	Miele & Cie. Kg	Gargerät und Verfahren zum Reinigen
DE102018103758B4 (de) *	2018-02-20	2023-03-23	Miele & Cie. Kg	Erkennvorrichtung zum Erkennen einer Zubehöreinrichtung in oder an einem Gargerät, Gargerätvorrichtung mit einer Erkennvorrichtung, Zubehöreinrichtung zur Aufnahme in oder an eine Gargerätvorrichtung, Gargerät mit einer Erkennvorrichtung oder einer Gargerätvorrichtung und Verfahren zum Betreiben einer Erkennvorrichtung
DE102017112824A1 (de) *	2017-06-12	2018-12-13	Miele & Cie. Kg	Vorrichtung zur Garraumreinigung
DE102019107727A1 (de)	2019-03-26	2020-10-01	Miele & Cie. Kg	Verteilerscheibe für eine Reinigungsflüssigkeit, Verteilersystem, Gargerät mit einem Garraum und Verfahren zu dessen Reinigung

2020
- 2020-03-24 DE DE102020108021.2A patent/DE102020108021A1/de active Pending
2021
- 2021-03-09 EP EP21161550.5A patent/EP3885656B1/fr active Active
- 2021-03-09 ES ES21161550T patent/ES3035244T3/es active Active
- 2021-03-09 PL PL21161550.5T patent/PL3885656T3/pl unknown

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP4357676A1 (fr)	2022-10-19	2024-04-24	Miele & Cie. KG	Procédé d'élimination d'un liquide de nettoyage moussant d'un espace de cuisson d'un appareil de cuisson et appareil de cuisson
DE102023127406A1 (de)	2022-10-19	2024-04-25	Miele & Cie. Kg	Verfahren zum Entfernen einer schaumbildenden Reinigungsflüssigkeit aus einem Garraum eines Gargeräts und Gargerät
BE1030970A1 (de)	2022-10-19	2024-05-16	Miele & Cie	Verfahren zum Entfernen einer schaumbildenden Reinigungsflüssigkeit aus einem Garraum eines Gargeräts und Gargerät

Also Published As

Publication number	Publication date
EP3885656C0 (fr)	2025-05-14
PL3885656T3 (pl)	2025-09-01
EP3885656A3 (fr)	2021-12-22
ES3035244T3 (en)	2025-09-01
EP3885656B1 (fr)	2025-05-14
DE102020108021A1 (de)	2021-09-30

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