EP3654813B1 - Domestic dishwasher and method for treating items to be washed - Google Patents

Description

The invention relates to a domestic dishwasher with a washing container, in whose treatment chamber at least one loading unit for receiving items to be washed is accommodated, and with at least one washing device for charging the treatment chamber with washing liquid.

During the course of a selected dishwashing program, a household dishwasher usually carries out one or more liquid-carrying partial wash cycles, such as e.g. During the respective washing liquid-carrying partial wash cycle, washing liquid is distributed, in particular sprayed, by means of at least one washing device such as a rotating spray arm, a fixed spray nozzle such as a roof shower, a movable spray nozzle such as a roof rotor, and/or another liquid distribution device in the treatment chamber of the washing compartment of the domestic dishwasher applied to items to be cleaned, such as crockery and/or cutlery, which are stored in and/or on at least one loading unit, such as a removable crockery basket or a preferably removable or extendable cutlery drawer. For this purpose, the respective washing device is preferably supplied by an activated circulating pump via at least one supply line with rinsing liquid, which collects at the bottom of the rinsing container, preferably in a depression, in particular in a pump sump. If the washing liquid is required to be heated in the respective liquid-carrying partial washing cycle, the washing liquid is heated by means of a heating device. This can be part of the circulation pump. At the end of the respective liquid-carrying partial wash cycle, the wash liquid present in the treatment space of the wash compartment is partially or completely pumped out of the wash compartment by means of a drain pump.

In order to dry the items to be washed that have been made wet and rinsed clean in this way, there are a large number of different drying systems with associated drying methods are available. These are in particular the so-called inherent heat drying, condensation drying (in particular, e.g. by means of a heat exchanger on a side wall of the washing container to cool it down), drying by opening the door at the end of the drying cycle, convection drying with the help of a fan, sorption drying with e.g. zeolite, etc... You are each designed to dry away liquid droplets that still adhere to the respective washware part after the liquid distribution operation of the last washing liquid-carrying partial wash cycle of a dishwashing program to be carried out, during the drying cycle.

However, if during the one or more liquid-carrying partial wash cycles preceding the drying cycle of a dishwashing program to be carried out, washing liquid collects in a depression on the upper side, such as a depression, trough, valley or other cavity of a washware item, and a quantity of washing liquid remains there at the end of the liquid distribution operation or washing operation of the liquid-carrying wash cycle preceding the drying cycle Partial wash cycle of the dishwashing program standing on top, this amount of liquid that has remained is often too large for it to be dried away by a conventional drying system. After the end of the drying cycle, this residual liquid can usually only be removed by the user manually tilting away the respective item of washware and/or drying it by hand using a tea towel, which is inconvenient and time-consuming. In addition, such puddles in depressions on the upper side of items to be washed can lead to unsightly, stubborn deposits or water marks after the drying cycle, since the remaining washing liquid contains dirt particles, cleaning agents, rinse aid, limescale and/or other additives that are present after partial or complete drying Dry up the puddles in the respective well as solid residues remain.

As a remedy for this, for example, proposes U.S. 6,053,185 propose a dishwasher with an air pressure injection system. This includes a compressed air distributor with a large number of fixed nozzle ducts, which are evenly distributed in the interior of the washing compartment of this dishwasher and attached to the top wall of the latter. Viewed together, the nozzle channels provide many individual nozzles that are directed downwards are directed. During the drying cycle of a dishwashing program, short bursts of compressed air, ie focused jets of compressed air, can be ejected from these nozzles downwards onto assigned locations in the upper rack, which is arranged below the compressed air distributor. Compressed air from a compressed air tank, which is accommodated in the underbody or base of the dishwasher below the washing container, is supplied to the compressed air distributor from the outside via a supply line. There is also a compressor that fills the compressed air tank with compressed air.

the DE 532 341 C relates to a dishwashing and - drying device with an electric drive for washing and drying the dishes. For this purpose, a rinsing device consisting of a crockery drum or an agitator and a drying device consisting of an impeller are provided. The crockery drum is designed in the shape of a circular cylinder. It is rotatably mounted about its vertically aligned axis of rotation. The impeller is arranged above the dish drum. The crockery drum has slotted holes in its top wall and in its cylinder wall, through which air can flow into its interior during operation of the impeller for drying the crockery.

the DE 2 615 976 A1 relates to a dishwashing machine provided for the commercial sector, such as restaurants, dining establishments, canteens, etc., without a drying tunnel, for drying dishes coming out of a dishwashing device on a tray. The dishes are placed in a dish rack. After the outlet of its washing device, it has a table for receiving the respective crockery carrier after it has exited the washing device. A drying box, which is equipped with a fan and heating resistors arranged in front of it, can be lowered in the vertical direction onto the respective crockery carrier in order to then direct a stream of hot air onto the crockery from above.

the DE 10 2015 013 364 A1 provides a pre-drying device within a cabinet of a dishwasher in addition to a cleaning device and a drying device. The pre-drying device comprises at least one blast nozzle that can be aligned with the respective piece of crockery, through which the piece of crockery with a Air jet can be acted upon in order to remove the washing liquid left behind after the cleaning cycle from its upper depression.

In the following, the specification "m/sec" corresponds to the SI unit "m/s".

The invention is based on the object of providing a household dishwasher with an alternative possibility, by means of which a quantity of liquid present on the upper side, in particular a quantity in a depression on the upper side, such as e.g. Hollow, sink, valley, or other cavity of the respective parts of the washware standing liquid accumulation can be largely removed.

This object is achieved by a household dishwasher according to the invention with the features of claim 1:
Household dishwasher with a washing compartment, in whose treatment space at least one loading unit for receiving items to be washed is accommodated, and with at least one washing device for charging the treatment space with washing liquid, with one or more rotationally drivable fan wheels being provided in the treatment space above the loading unit, in particular an upper crockery basket , whereby the respective fan wheel is driven in rotation in at least one blow-off operating phase in such a way that it sucks air out of the treatment room, accelerates it and, starting from it, moves it forward in the treatment room as an air flow downwards, which leads to a spacious blow-off area on the upper side or below the fan wheel arranged loading unit strikes and from there any stored items to be washed largely blows off the top side of the existing amounts of washing liquid, and the respective fan wheel by a drive assigned to it in the jew hurry blow-off operating phase is driven in rotation in such a way that the air flow generated by it with a propulsion speed of at least 5 m / sec, in particular between 8 m / sec and 20 m / sec, preferably between 9 m / sec and 15 m / sec, on the dem Impinges on the top of the loading unit arranged below the fan wheel in the spacious blow-off area associated with the fan wheel.

The household dishwasher according to the invention is thus compared to the individual air nozzles U.S. 6,053,185 and DE 10 2015 013364 A1 an alternative device ready, with the upper side existing liquid quantities, in particular in upper-side from the stored in and / or on a loading unit parts to be washed Indentations in the items to be washed can be used to quickly and easily remove any accumulations of liquid that have accumulated.

In the household dishwasher constructed according to the invention, one or more fan wheels are accommodated in the treatment chamber of the washing compartment, which for a desired blow-off operating phase directly suck in the air present in the treatment chamber of the washing compartment, i.e. the internal air in the treatment compartment of the washing compartment itself, and actively accelerate it in such a way that it generates a flow pulse is provided, which is sufficient to largely blow off an amount of liquid present on the upper side of the respective item of washware, in particular an accumulation of liquid standing in a depression on the upper side of the respective item of washware. This blowing off of liquid from the respective item of washware merely by accelerating the air that is already present in the treatment chamber works in an advantageous manner, in particular simply, quickly and efficiently.

Because in the household dishwasher according to the invention, the air in the treatment chamber is only accelerated during a blow-off phase of operation by one or more rotatably drivable fan wheels housed in the treatment chamber of the washing container in rotation operation and subjected to a speed component that is sufficient to give the generated air flow such a large flow impulse that liquid quantities Which are present on the upper side of items to be washed, in particular in depressions on the top side of items to be washed, can be blown down, are other components—such as, for example, in the U.S. 6.05 3,185 a compressor, an air pressure tank, a compressed air line from the air pressure tank to the nozzle manifold - not required. The one or more rotationally drivable fan wheels can be accommodated in a structurally simple manner in the treatment chamber of the washing compartment, which favors the mass production of domestic dishwashers in the millions. A compressed air supply from the outside as in the U.S. 6,053,185 is not intended and not required. Thus, pressure losses, such as those in the base of the dishwasher U.S. 6,053,185 housed compressor and compressed air tank as well as the long compressed air riser line can be avoided. In addition, compared to the dishwasher with the air pressure injection system U.S. 6,053,185 largely avoided that during the drying phase of a dishwashing program via the individual nozzles from the outside supplied compressed air changes the pressure conditions and/or air, moisture and/or vapor composition in the washing compartment treatment space, which entails modifications in the construction of household dishwashers of conventional design and/or changes in the type and/or implementation of their dishwashing programs could. Under certain circumstances, the supply of compressed air from outside could, for example, make it necessary to redesign the expansion valve or the door locking system of the dishwasher, e.g. to prevent the door from being opened unintentionally due to overpressure forces that could be caused in the treatment room by the compressed air supplied from outside. In contrast, in the case of the invention, one and the same basic type of domestic dishwasher can easily be equipped ex works with and without a fan wheel or fan wheels in the treatment room. This simplifies the mass production of different variants of domestic dishwashers. A domestic dishwasher can also be retrofitted with one or more fan wheels in a simple manner, since its treatment space is easily accessible by opening its door. In addition, there is no additional space in the base of the household dishwasher for the compressor and the compressed air tank as in the U.S. 6,053,185 needed.

In addition, in practice, the one or more fan wheels housed in the washing room or treatment room are less sensitive to contamination such as leftover food, grease, etc..., and/or washing liquid, especially washing-up liquid, than the air nozzles U.S. 6,053,185 and DE 10 2015 013364 A1 . During the washing operation of a dishwasher, the air nozzles and their associated compressed air lines or compressed air channels can become clogged with dirt particles, leftover food, cleaning agents, limescale, etc., and/or can be filled with washing liquid, and their function is impaired or unusable as a result for a desired blow-off phase can be, because the proper ejection of compressed air jets is impeded, the respective fan wheel in the treatment chamber of the domestic dishwasher according to the invention can always be driven in rotation over its service life and is therefore functional.

In the domestic dishwasher according to the invention, a single fan wheel or a plurality of fan wheels is or are above the loading unit to which flow is to be in particular an upper dish rack, arranged in the treatment room or washing room. During a blow-off operating phase, the respective fan wheel generates an air flow or a downward wind from the air in the treatment chamber onto the items of washware stored below it on and/or in the loading unit. Since the air flow generated by the respective fan impeller essentially flows directly, i.e. largely unobstructed, to the respective item of washware located below it in and/or on the loading unit, it impacts with the flow impulse provided by the fan impeller largely unattenuated on the upper side of the respective item Washware part - such as in a top depression of the washware - standing amount of liquid and pushes it away from there or blows it away from there, so that it runs down to the bottom of the washing compartment. Shadowing of the air flow generated by the respective fan wheel during its rotational operation on its way to the upper side of the respective item of washware through adjacent items of washware is in this movement of the air flow with a propulsion direction from top to bottom, i.e. from an area of the treatment room in which the respective fan wheel is provided and which is selected above the loading unit to be blown off, downwards onto the items of washware stored in and/or on the loading unit, are hardly present or not present at all. Due to the wide-ranging, i.e. extensive or large-area, air flow generated by the respective fan wheel downwards in cross section (viewed in a sectional plane perpendicular to the air flow direction), this can impinge on the upper side of the respective washware item largely independently of the position of the washware item and any washing liquid present there, in particular in a depression press or push out of the recess, ie blow out. This blowing of liquid out of a depression on the upper side of the respective item of washware is successful even when items of washware of different heights are placed in and/or on the loading unit. Because of the air flow moving forward from top to bottom, the tops of the items to be washed can be reached directly by air, largely unhindered or largely without shadowing.

The invention includes directional and/or spatial information such as top, bottom, side, front, rear, vertical, horizontal, etc. ... as well as terms with directional dependency and/or spatial reference such as front, back, side wall, floor , ceiling, etc.... to be understood from the point of view of a user standing in front of the domestic dishwasher and operating and using it as intended.

From its position, it looks onto the front, in particular the front door, of the domestic dishwasher when the front door is in its closed end position. When the front door is fully open, e.g. for unloading or loading the washing room or treatment room, and is preferably in an approximately horizontal position, the user looks in the depth direction into the treatment room or washing room. When we speak of "above", this is a position that is higher than a "below" position, viewed in the height direction of the domestic dishwasher.

Furthermore, within the scope of the invention, a liquid-carrying partial wash cycle is understood to mean a dishwashing program to be carried out, a washing phase, during which the washing liquid is distributed, in particular sprayed, in the treatment chamber by means of the at least one washing device. The fact that during the course of a dishwashing program to be carried out one or more liquid-carrying partial wash cycles (e.g. a prewash cycle, a cleaning cycle, an intermediate wash cycle and a final rinse cycle in succession) and then a drying cycle that concludes the wash cycle are carried out is already explained in more detail in the introduction to the description. The basic explanations given there preferably also apply here within the scope of the invention. If necessary, one or more liquid-carrying partial rinsing cycles, such as the intermediate rinsing cycle, can be omitted or carried out several times. The washing device can preferably be formed by a spray arm that can be rotated during the respective washing phase and has a large number of spray nozzles, from which washing liquid is sprayed into the treatment chamber. After the last liquid-carrying partial wash cycle, in particular the rinsing cycle, of the wash cycle of the respective dishwashing program, there finally follows a drying cycle, during which the washware items previously wetted with washing liquid and washed clean are dried.

The loading unit to be blown off is preferably an upper dish rack, which is accommodated in the treatment space above a lower dish rack at a height distance from the latter and can be moved out of the treatment space when the front door of the dishwasher is open. The upper crockery basket preferably has a lattice structure made up of longitudinal and transverse wires. Through the open areas of this lattice structure of the upper dish rack, washing liquid can usually be sprayed from below from the spray nozzles of a preferably be sprayed on this mounted, rotatable spray arm. In the upper dish rack, the items to be washed are usually placed upside down, ie turned upside down, for spraying their cavities soiled by food and/or drinks with washing liquid. They often have a shallow indentation such as a trough, depression, valley or other cavity on the upper side. Such washware items are, for example, cups whose bases (viewed in their position of use) are curved inward and/or surrounded by a rim protruding downwards. Bowls, bowls, drinking glasses and/or other items of crockery and/or cooking utensils such as wooden spoons, pots, egg cups, etc. can also be placed in the loading unit on their floors or storage areas on the top after they have been turned over have a depression in which washing liquid has collected after the implementation of the respective liquid-carrying partial wash cycle and remains there. This also applies to items to be washed that are placed in the upper rack in their usual position of use, e.g. for salad servers, spoons, small bowls, espresso cups, etc... Rinsing liquid can remain after the respective liquid-carrying partial wash cycle.

In summary, it is therefore expedient if the one or more fan wheels are provided in particular above an upper crockery basket, which is preferably accommodated above a lower crockery basket in the treatment room. Items to be washed, such as cups, drinking glasses, food/soup bowls, plates, dessert bowls, muesli bowls, breakfast mugs, salad bowls, egg cups and other small items, are usually placed in the upper rack, which often have a peripheral edge on their base or another flat one there have deepening. If such a container is placed with its base pointing upwards, ie upside down, in the upper dish rack, liquid collects on the upper side of the respective container during the respective liquid-carrying partial wash cycle of a dishwashing program to be carried out, limited by its upwardly protruding bottom edge or recessed edge. This accumulation of liquid is now pressed or pushed out laterally out of the recess of the container during the rotational operation of the fan wheel by the air flow generated by the latter downwards. If such a blow-off operating phase is carried out, in particular after the end of the liquid distribution operation of the last liquid-carrying partial wash cycle, particular rinsing cycle, the rinsing cycle of the respective dishwashing program, preferably during an end section of this liquid-carrying partial wash cycle and/or during an initial section of its drying cycle that concludes the rinsing cycle, or such a blow-off operating phase is inserted between the end of the liquid distribution operation of the last liquid-carrying partial wash cycle, in particular the rinsing cycle, and the beginning of the drying cycle that concludes the rinsing cycle , so during the remaining duration of the drying cycle these indentations or depressions in the upper sides of the items to be washed can also be dried essentially perfectly or completely. Advantageously, no disturbing drying edges or deposits remain.

If the respective fan wheel in the treatment room of the washing container (which is exposed to washing liquid and gets wet during washing operation) is driven in rotation, it can generate an air flow or wind from the air present in the treatment room, which preferably already comes from the air outlet area of the fan wheel up to the point of impact in and/or on the loading unit, in particular at the point of impact in and/or on the loading unit, in cross section, i.e. viewed in a sectional plane perpendicular to its advance direction or direction of movement, a much larger area is applied than an air jet in the U.S. 6,053,185 or the DE 10 2015 013 364 A1 , which is focused from a compressed air nozzle, ie is ejected in a narrowly localized manner, and therefore only hits a fixed point in the upper rack. The air flow generated by the respective fan wheel is, in particular, from the air outlet area of the fan wheel to the point of impact in and/or on the loading unit compared to the focused air jet U.S. 6,053,185 or the DE 10 2015 013 364 A1 unguided, ie freer, and viewed in cross-section (in a sectional plane perpendicular to its direction of flow) much more extended or spacious. It is designed in particular in the form of a rotating air flow vortex that has a much larger impingement surface in and/or on the loading unit than the narrowly focused air jet U.S. 6,053,185 or the DE 10 2015 013 364 A1 detected, each of which is precisely aligned with a single location in the upper rack. The air flow generated according to the invention therefore does not require precise alignment with the items to be washed in and/or on the loading unit. There, it can detect a large number of items to be washed at the same time. The loading unit can also be advantageously adjusted in terms of its height position and thus its height distance from the respective fan wheel arranged above it change the adjustment ranges usually provided for them largely without influencing the blow-off effect of the air flow. Tests that have been carried out successfully have shown that it is expedient if the respective fan wheel is expediently provided at a height distance of between 2 cm and 50 cm above the extensive blow-off area of the washware receiving surface of the loading unit to be flushed, in particular the upper dish rack. In order to be able to hit as many locations as possible in the recording plane of the upper rack with a focused air jet, in contrast, in the dishwasher U.S. 6,053,185 a large number of compressed air lines with a large number of nozzle openings evenly distributed over the roof level of the rinsing tank are required. This can be too expensive under some circumstances. In addition, gaps remain between the focused air jets due to the spatial spacing or distances of the fixed, stationary air jets from one another, so that in the intermediate area between two adjacent air jets striking fixed locations in the upper dish rack, there may not be a sufficiently strong air jet to push away a stagnant quantity of liquid a top-side depression of a washware positioned there is present. The lower the number of nozzles selected, the larger the gaps in the upper rack that are not hit by any air jet. Whether or not liquid that is in a depression on the top of the respective item of washware can be pressed out of it by a focused jet of compressed air depends on the U.S. 6,053,185 ie from the respective storage location or from the spatial position of the item to be washed in the upper rack. The effectiveness of this stationary nozzle field, which works with individual, spaced, fixed, focused compressed air jets, depends on whether the respective item of washware placed in the upper rack is exactly in the compressed air jet path of a compressed air nozzle or not.

The situation is completely different with an air flow generated by a fan wheel according to the invention:
In contrast to an air nozzle, the respective fan wheel in the treatment chamber of the washing tub does not generate a focused, i.e. narrowly directed or limited, largely straight air jet during its rotational operation, which only hits a predetermined point on the wash items storage surface of the loading unit arranged below it, i.e. on a singular point or to a locally very tight limited zone of the wash items storage area of the loading unit is "focused", but a freer air flow with a wider cross-section (seen perpendicularly to the direction of air flow), in particular a rotating air flow vortex, which makes the wash items storage area of the loading unit much more spacious, i.e. more extensive or extensive (than a focused air jet ) actively flows with the air present in the treatment area of the rinsing tank. The blow-off area of the loading unit hit or caught by the air flow of the respective fan wheel (when it is rotating) is therefore (compared to the focused impact zone of an air jet generated by a compressed air nozzle) more extensive or spacious, ie larger.

In particular, the air flow generated by the respective fan impeller covers a large blow-off area of the loading unit, which corresponds to at least 10%, in particular between 20% and 100%, preferably between 20% and 25%, particularly preferably around 25%, of the total receiving area or wash items storage area of the loading unit . It is thus possible for one and the same air flow generated by the respective fan wheel during its rotation operation to hit or grip a large number of washware items that are placed on the washware storage surface of the loading unit and in the extended or extensive blow-off area lie. The blowing off of any liquid present on the respective item of washware, in particular an amount of liquid standing on its upper side, becomes more independent of the respective placement location of the item of washware in the loading unit. Precise alignment of the air flow to the individual storage locations of the items to be washed in the loading unit, which is arranged below the one or more fan wheels in the treatment chamber, is not necessary, particularly as long as the preferred direction of the air flow is from top to bottom. The free air flow generated by a rotating fan wheel, which is in particular designed as an air flow vortex, applies air to a much larger impact surface on the upper receiving or setting surface of the loading unit than the focused air jet from a single compressed air nozzle. In addition, viewed over its cross-sectional area and in particular at each impact point of its impact surface covered or occupied by it on the loading unit, it preferably has approximately the same flow momentum. The air flow generated according to the invention by means of a rotating fan impeller thus acts on the surface it hits in and/or on the The loading unit and thus the items to be washed that may be stored there are preferably more homogeneous or more uniform than is the case with the individual air jets of the nozzle array U.S. 6,053,185 or the DE 10 2015 013364 A1 is possible.

Due to the fact that during the respective blow-off operating phase or other fan operating phase, the air flow generated by the respective fan wheel during its rotational operation, in particular the air vortex generated by the respective fan wheel, viewed over its (in particular its) cross-sectional area with approximately the same flow momentum, i.e. a uniformly spacious blow-off area of the hits the loading unit arranged below the fan impeller, the items to be washed that are possibly placed there are pushed or pressed largely evenly downwards against the storage plane of the loading unit and thus remain largely stable in position. The respective item of washware is acted upon at each point on its upper side by approximately the same downward, in particular vertically downward, force component of the downward, in particular vertically downward, air flow generated by the respective fan wheel during its rotational operation. This largely avoids that a part of the items to be cleaned in an undesirable manner, as is the case with a singular jet of air from the nozzles U.S. 6,053,185 or the DE 10 2015 013364 A1 can happen, is applied to one side with a force component that changes its parking position or even leads to its tipping over. Damage or other impairments to the items to be washed are therefore unlikely in the spacious blow-off area of the loading unit that is exposed to the air flow from the respective fan wheel.

The respective fan impeller is expediently designed in such a way that, during its rotational operation during one or more blow-off operating phases, it generates a large-area air flow viewed in a sectional plane perpendicular to the air flow direction, in particular a rotating air flow vortex, which, viewed perpendicular to its main flow direction, has a cross-sectional area preferably between 450 cm ² and 2000 cm ² for a domestic dishwashing machine of 45 cm standard width and 60 cm standard depth, and preferably between 500 cm ² and 2500 cm ² for a domestic dishwashing machine of 60 cm standard width and 60 cm standard depth.

According to an advantageous development of the invention, the respective fan wheel is designed as an axial fan, in particular as a propeller or impeller. In the case of an axial fan, its axis of rotation runs approximately parallel or axially to the air flow. One advantage is its simple construction. Another advantage is its small dimensions in relation to the high air throughput, viewed in the axial direction or axial flow direction, i.e. it can be built as a flat unit viewed in the axial flow direction, i.e. perpendicular to its circle of rotation swept by its one or more blades or screws. The height of its installation space is preferably between 4 and 6.5 times less than the diameter of its circle of rotation.

If the respective axial fan is housed in the treatment chamber of the washing compartment in such a way that its rotation circle, described by its wings or blades in ventilation or fan operation, is aligned largely horizontally, ie its axis of rotation then extends essentially vertically, it can be installed particularly favorably with little Accommodate the height requirement, in particular with an installation space height of between 1 cm and 4 cm, in the treatment room (calculated without an associated drive, in particular without an associated electric drive motor). Advantageously, the respective axial fan is arranged above a wide or extensive blow-off area that is desired in the washware storage area of the loading unit, in particular an upper crockery basket. Due to its flat design, it can be attached without too much loss of space, in particular in and/or on a frame, such as a cutlery drawer, which is arranged at a height distance directly above the loading unit to be flushed, in particular an upper dish rack, in the treatment room be. During a blow-off operating phase, the respective axial fan mounted in this way thus generates an air flow that is expanded in cross section (viewed perpendicularly to the direction of flow) with a forward thrust from top to bottom, preferably in the vertical direction. It preferably strikes directly, ie largely unobstructed, on a large sub-area or even on the entire area of the wash items storage area on the upper side of the loading unit. This air flow can thus simultaneously blow on the top side of all items of washware that are placed on the loading unit in this extended or large-area impingement area of the air flow. An unguided, large-area free flow, viewed in cross-section, impinges directly on the upper side of the items to be washed, with the flow impulse originally imposed on it by the axial fan largely unweakened, ie largely without flow momentum losses due to deflections or deflections. With this air flow directed from top to bottom, in particular vertical, an amount of liquid present on the upper side of the respective item of washware can be optimally blown off. In particular, this air flow can be used to push out a liquid accumulation in a depression on the upper side, such as a depression, trough or other cavity of the respective washware item, so that this liquid overflows from the depression and flows down to the bottom of the washing compartment of the domestic dishwasher. In addition, it is largely ensured that the wash items hit by the air flow, which are arranged in the spacious blow-off area of the loading unit associated with this air flow, remain stable.

With the respective axial fan, air can be sucked out of the treatment chamber in a simple manner for a blow-off operating phase and accelerated in such a way that an air flow, in particular an air flow vortex, is generated with a high propulsion speed, which is sufficient for a quantity of liquid present on the top of the respective washware item, in particular an in to blow off or blow off a liquid accumulation standing in a depression on the upper side of the respective item of washware.

The one or more vanes or blades of the axial fan wheel preferably each have a radial length (measured radially outwards from the center or the axis of rotation of the axial fan wheel) which corresponds to approximately half the diameter of that circular area which serves as the respective blow-off zone or as the respective blow-off area desired, i.e. required, within the wash ware storage area of the loading unit.

With the air flow generated by a fan wheel, in particular an axial fan wheel, it is possible to flow a large area in the loading unit arranged below it, preferably largely evenly, and to blow off items of washware stored there on the top side. A few fan wheels, in particular fewer than 6 fan wheels, preferably between two and four fan wheels, are therefore sufficient to flow the entire surface or loading area of the loading unit.

It can be advantageous in particular if a fan wheel, in particular an axial fan wheel, is arranged above each of the four quadrants of the roughly rectangular washware storage surface or receiving surface of the respective loading unit to which air is to flow, in particular the upper crockery basket. Then four air currents can be generated by the four fan wheels. One quadrant of the washing items storage area of the loading unit can be flown through by a large-area air flow viewed in cross section, in particular by a rotating air flow vortex. Such an airflow vortex can be provided in particular by the rotational operation of an axial fan wheel, one or more blades of which each have a radial length which preferably corresponds approximately to half the width and/or depth length of the respective quadrant. This specific assignment of four fan wheels to the four quadrants of the loading unit means that air can be blown over essentially the entire surface of the loading unit for storing items to be washed, in particular the upper crockery basket.

For example, in a household dishwasher with external dimensions of 60 cm wide and 60 cm deep, a loading unit that is housed in the washing compartment and can be moved out of it, such as an upper dish rack, has dimensions of about 48 cm wide and about 50 cm deep and, as a result, has a storage area of between 2000 cm ² and 2500 cm ² respectively. If the storage area of the loading unit, which is approximately rectangular in plan, is advantageously divided into four quadrants of approximately the same size, and if an axial fan wheel is specifically assigned to each of the four quadrants above, then the respective axial fan wheel is appropriately dimensioned in such a way that its respective blade has a radial extension (measured from the axis of rotation of the axial fan wheel radially outward) in particular between 8 cm and 12 cm.

If necessary, a different assignment of one or more fan wheels to one or more quadrants or zones of the treatment room and/or the loading unit to be blown off can also be expedient. For example, less than four quadrants, in particular only between one and three quadrants, preferably only two quadrants, can each be acted upon by the air flow of a fan wheel positioned above the respective quadrant. If, for example, when looking from the front into the treatment chamber of the domestic dishwasher, only the two left quadrants of the loading unit, one behind the other, are used as storage zones for items to be washed are to be available, it is sufficient if a fan wheel is housed in the treatment room just above these quadrants. The remaining space above the two right quadrants remains free of fan wheels.

Alternatively, reversed to this arrangement, the two fan wheels can be arranged above the two right-hand quadrants, while no fan wheels are assigned above the two left-hand quadrants.

In general, it can therefore be expedient if one or more fan wheels are assigned above a first area of the storage area of the loading unit, while no fan wheels are assigned above a second area of the storage area of the loading unit. If a common frame for the one or more fan wheels is provided above the loading unit to be blown off, a first area of the frame is equipped with one or more fan wheels, while a second area remains free of fan wheels. This is then available for other uses. In particular, it can be designed as a cutlery shelf and/or shelf zone for items to be washed, preferably small items.

According to a further advantageous variant, even a single fan wheel, in particular an axial fan wheel, can be sufficient to blow the entire surface of the wash items on the loading unit with the air flow it generates. To this end, it can be expedient if this individual fan wheel is preferably positioned in the center of the rectangular outline of the loading unit to be blown off above the latter. For example, in the case of a household dishwasher with expedient external dimensions of 60 cm wide and 60 cm deep, in which a loading unit accommodated in the washing compartment and which can be moved out of it - such as an upper crockery basket - preferably has dimensions of about 48 cm wide and 50 cm deep, can A single fan wheel, in particular an axial fan wheel, which can be driven in rotation and is arranged centrally above this storage area is sufficient to blow away the entire storage surface of this loading unit with air, in which the radial extension (measured radially outwards from the axis of rotation of the axial fan wheel) of the respective blade of this centrally arranged axial fan wheel is expediently between 20 cm and 24 cm is selected.

Extensive tests have shown that in practice it is favorable for proper blowing off of the usual amounts of liquid, which can remain in depressions on the wash ware parts common in the respective household after the respective liquid-carrying partial wash cycle of the wash cycle of a dishwashing program to be carried out, if according to According to the invention, the respective fan wheel is driven in rotation by a drive assigned to it in such a way that the air flow it generates has a propulsion speed of at least 5 m/sec, in particular between 8 m/sec and 20 m/sec, preferably between 9 m/sec and 15 m/sec, particularly preferably about 15 m/sec, impinges on the spacious blow-off area assigned to the fan wheel on the upper side of the loading unit arranged below the fan wheel.

In order to achieve such a high flow rate of the air flow, according to an advantageous development of the invention, the respective fan wheel, in particular the respective axial fan wheel, is expediently assigned a drive which drives it in the respective blow-off operating phase with a target speed of preferably at least 5000 revolutions/minute, in particular with Target speeds between 5000 rpm and 10000 rpm, preferably between 6000 rpm and 8000 rpm, drives rotating. Tests that have been carried out successfully with such speeds for axial fan wheels have shown that the flow impulse imparted to the generated air flow is then sufficient to blow away the amount of liquid which has usually remained standing on the upper side of the respective item of washware.

This ensures during the blow-off operating phase that the air in the treatment room is moved or accelerated so much by the respective fan wheel rotating at such a high speed that it emits an air flow with a flow impulse into the treatment room onto the items to be washed in the loading unit sufficient to largely blow off the usual amounts of liquid standing on top of the items to be washed. With an air flow generated in this way, not only liquid droplets can be blown off the respective item of washware, but also a larger amount of liquid than the liquid amount of a liquid droplet, in particular an amount of liquid or accumulations of liquid between 3 ml and 200 ml can be blown off the respective wash ware.

The one or more fan wheels can be conveniently mounted or attached to a common frame, such as a cutlery drawer. This frame is preferably accommodated in the washing container above the loading unit to which water is to flow, in particular above an upper crockery basket. This frame is preferably designed to be removable, in particular retractable, so that the one or more fan wheels attached to it are easily accessible when required, for example for repairs or cleaning. This frame can be provided in particular at that point in the treatment chamber of the washing compartment where a cutlery drawer that can be pulled out is otherwise provided. Alternatively, it can be particularly favorable if the one or more fan wheels are held on a cutlery drawer itself, which is arranged in the treatment chamber of the washing compartment above the upper crockery basket at a height distance or height clearance from it. In particular, it is advantageous if the one or more fan wheels are installed as flat as possible in the frame, in particular the cutlery drawer, or are mounted on it, so that they are largely flush with its predetermined, in particular upper and/or lower, outer boundary line or only opposite it survive slightly. The one or more fan wheels are preferably mounted on the frame, in particular the cutlery drawer, in such a way that their one or more blades or propellers move only slightly downwards, in particular by a maximum of 3 cm, or not at all in relation to the lower edge or underside of the frame stand out As a result, the spatial conditions present in the treatment chamber of the washing container are essentially retained compared to those in a conventional dishwasher (without fan impeller/fan wheels). In this way, the one or more blades or propellers of the respective fan wheel are largely safe from blockage and/or damage caused by mechanical intervention in their rotational path, such as by the hand of a user when loading or unloading items to be washed in or from the upper rack is arranged under the frame at a free space distance, or during operation of the dishwasher by an upwardly protruding item to be cleaned in the upper dish rack arranged under the frame at a free space distance from it.

In addition or independently of this, the respective fan wheel can also be attached to the underside of the top wall of the washing compartment in the treatment room, in particular hanging downwards, in order in particular to avoid a cutlery drawer arranged below it and/or an upper crockery basket arranged below it, if necessary during at least one Blow off operating phase to blow with air. According to this alternative, the loading unit to be blown off can also be a cutlery drawer, which is preferably arranged above the upper crockery basket and is used to hold cutlery items and/or small crockery such as espresso cups.

If, in addition to or independently of this, liquid is to be blown off the tops of items to be washed stored in the lower rack, it may be expedient, in addition to or independently of the above arrangements of the one or more fan wheels, to attach the respective fan wheel to the upper rack and from this if necessary to have an air flow generated from top to bottom onto the lower dish rack during a blow-off phase of operation. According to this advantageous variant, the loading unit to be blown off can therefore optionally be formed by a lower crockery basket. The one or more fan wheels can then be expediently attached to the upper crockery basket, which is arranged at a height distance above the lower crockery basket.

It may also be possible to mount one or more fan wheels in an upper area of a side wall and/or the rear wall of the washing compartment in the treatment room high enough for a downward air flow to reach a loading unit that is lower than where the respective fan wheel is attached, such as the upper rack can be delivered. For example, a fan wheel can be accommodated in the two rear upper corners, or in particular in the four upper corners of the treatment room. During rotation, the respective fan wheel then preferably generates an air flow directed obliquely downwards onto the desired blow-off area assigned to it in the washing item storage plane of the loading unit.

A control unit is expediently provided, by means of which a drive associated with the respective fan wheel, in particular an electric drive motor, in particular can be switched on and then off again for its rotation mode. The control unit can include a control and/or regulation unit, by means of which the rotational speed of the drive, in particular the electric drive motor, can be adjusted during the switch-on operating phase. According to an advantageous development of the invention, this control unit ensures that the drive assigned to the respective fan wheel after the end of the liquid distribution operation of a liquid-carrying partial wash cycle, in particular a final rinse cycle, of a dishwashing program to be carried out, in particular during an end section of this liquid-carrying partial wash cycle, and/or during an initial section of the rinsing cycle-closing drying cycle is operated in the switched-on state only for a predetermined running time section of the total running time of the blow-off operating phase or during the total running time of the blow-off operating phase. The control unit for the one or more drives can be a component of another control unit of the household dishwasher, such as a higher-level main control unit, which is responsible for the wash program sequence of the respectively selected dishwasher program. Alternatively, the control unit can be assigned to the drive of the respective fan wheel, in particular as a separate unit. It can preferably be accommodated in the treatment room and designed to be flush-water-tight. Advantageously, the frame explained above, the one or more fan wheels and this control unit can be combined to form a common assembly unit. If necessary, this can also accommodate the drive or drives for the one or more fan wheels.

A blow-off operating phase can preferably be carried out during an end section of a liquid-carrying partial wash cycle such as the cleaning cycle or rinsing cycle of a dishwashing program when the liquid loading operation or liquid distribution operation has been stopped by means of the at least one washing device in the treatment room. With one or more rotatable spray arms as washing devices, this is the case in particular when the circulating pump, which feeds the one or more spray arms with liquid via one or more feed lines, stops its circulating operation, ie has been switched off. Then, by blowing off residual water from the loading unit and/or from items of washware stored there, it can be made to flow off to the bottom of the washing compartment in an improved manner. There it collects primarily in the pump sump and can then, if necessary, be pumped out of the washing container partially or completely, in particular by means of a drain pump.

If a blow-off operating phase is carried out, in particular between two consecutive partial wash cycles carrying washing liquid, such as between the cleaning cycle and the subsequent intermediate wash cycle and/or between the intermediate wash cycle and the subsequent final rinse cycle, this can be advantageous, since the carry-over of dirty residual water that is contaminated with cleaning agents, Rinse aid and/or additives can be offset from a preceding liquid-carrying partial wash cycle to a subsequent partial wash cycle. For example, it can be of interest to prevent residual water from the cleaning cycle with cleaning agent from getting into the rinse cycle, since carried over cleaning agent can impair the effectiveness of the rinse aid. Furthermore, the best possible removal of residual amounts of liquid from the items to be washed is also advantageous because this avoids an undefined level of washing liquid in the washing container, in particular for the subsequent liquid-carrying partial wash cycle. By removing such residual amounts of water from the tops of the items to be washed by blowing them off, these residual amounts of water do not also need to be additionally heated in a subsequent liquid-carrying partial wash cycle, which starts from a defined amount of washing liquid to be heated in the washing container, which saves heat energy.

If the respective fan wheel after the end of the liquid distribution operation of the last liquid-carrying partial wash cycle, in particular the rinsing cycle, of a dishwashing program to be carried out, in particular during an end section of this liquid-carrying partial wash cycle, and/or during an initial section of the drying cycle that concludes the wash cycle, of this dishwashing program for a predetermined runtime section of the total runtime of the blow-off operating phase or is switched on during the entire duration of the blow-off operating phase, liquid accumulations in depressions such as troughs or depressions in the items to be washed can be largely blown out of them, so that these liquid quantities fall to the bottom and collect at the bottom of the washing container, especially in its pump sump. Standing puddles of liquid in depressions on the upper side of the items to be washed are therefore removed in advance, ie before and/or during a Initial section of the drying cycle removed by blowing off using moving air of the treatment room. The drying process itself can be carried out by means of a dedicated drying system such as sensible heat drying system, convection drying system, condensation drying system, heat exchanger drying system, sorption drying system, door opening drying system, etc..., or combinations of these. The combination of a preceding or initial blow-off operating phase and one of these drying methods, in which the moisture content of the air in the wash cabinet is successively reduced within a specified drying time period for the drying cycle, i.e. the air in the wash cabinet is dried in a targeted manner within a specified drying time period for the drying cycle ensure a largely complete drying of the surfaces in the top depressions of the items to be washed. Visible drying edges or deposits in the recesses of the items to be washed are thus avoided.

In addition, the blow-off phase inserted between the last liquid-carrying partial wash cycle, in particular the final rinse cycle, and the drying cycle of a dishwashing program advantageously makes it possible for the temperature at which the washing liquid is heated by at least one heating device is heated, can be lowered compared to the temperature of the last liquid-carrying partial wash cycle, in particular the rinse cycle, of a dishwashing program without a blow-off phase (between the rinse cycle and the drying cycle), which can save electrical energy. Because by blowing off the items to be washed with air, not only can any accumulations of liquid in depressions on the upper side of the items to be washed be drained down to the bottom of the washing compartment, but also generally the liquid droplets adhering to the items to be washed can be drained down to the bottom of the washing compartment in an improved manner, so that the items to be washed are already drier at the beginning of the drying cycle of the respective dishwashing program and the washing room air or process air in the washing tub is less moisture-laden overall than before (without a blow-off phase). As a result, a lower heating temperature of the items to be washed and the air in the treatment space or receiving space of the washing compartment can advantageously already be used for proper inherent heat drying and/or condensation drying is sufficient. In particular, a smaller temperature difference between the walls of the washing compartment and the items to be washed or the washing room air or process air can be sufficient to remove moisture still contained in the washing compartment air or process air on the washing compartment walls, which are cooler compared to the air/steam mixture in the washing compartment. to be able to condense out satisfactorily. In the case of a sorption drying device, even a smaller amount of sorption material can be sufficient to absorb, in particular to adsorb, the liquid adhering to the washing chamber air and/or to the items to be washed. The expenditure, in particular in terms of electrical energy, can thus be reduced for the liquid-carrying partial wash cycle preceding the drying cycle, in particular the final rinse cycle, and/or for the drying cycle of the wash cycle of the respective dishwashing program.

If several fan wheels are distributed in the treatment room, in particular in a common position level, above the loading unit receiving the items of washware to be blown off, it can be particularly advantageous if the several fan wheels are each driven to rotate individually one after the other during the running time sections that are selectively assigned to them in the respective blow-off operating phase , ie the rotational operating phases of the fan wheels are carried out sequentially or one after the other. As a result of these selective rotational operating phases of the several fan wheels, which are offset in time over the entire duration of the respective blow-off operating phase, per rotational operating phase, i.e. during the respective running time section, only the drive energy for the drive or the drive device to be driven in rotation during this running time section, individual fan wheel required and not the accumulated drive energy for the drive device or the drive devices of several or all fan wheels at the same time. This simplifies the provision of electrical power or electrical energy supply for the drives of the multiple fan wheels. Preferably, for the respective fan impeller, an individual running time or a selectively assigned running time subsection is preferably between 5 seconds and 30 seconds, in particular between 8 seconds and 20 seconds, preferably between 10 seconds and 20 seconds, particularly preferably of about 15 sec, chosen. If, for example, a single fan wheel is specifically assigned to each of the four quadrants of the loading unit to be flown, and if these four fan wheels are individually, ie each alone, operated one after the other according to the above individual running times, the total running time of the respective blow-off operating phase is preferably between 20 seconds and 120 seconds, in particular between 32 seconds and 80 seconds, preferably between 40 seconds and 80 seconds, particularly preferably about 60 seconds (seconds). Possibly, compared to this information, the total running time of the blow-off operating phase can be preferably 10% to 20% longer due to possible pauses or dead times between the individual running times of the fan wheels. The respective blow-off operating phase can thus advantageously be integrated into the usual course of a dishwashing program with almost no delay worth mentioning.

Due to the temporally separated, successive rotational operating phases or intervals of the several fan wheels viewed over the entire duration of the respective blow-off operating phase, disturbing air turbulences of the air flows generated by them, in particular air flow cancellations or air flow short circuits, preferably in the intermediate area between adjacent fan wheels, are largely avoided . Since in the respective interval of the blow-off operating phase only a single fan wheel is actively driven or running by its assigned drive, while the drives assigned to the other fan wheels are switched off and stand still, only the power, in particular electrical, power for this one active drive is per interval to provide. With the sequential sequence of individual operating phases of the fan wheels, the amount of noise generated is also limited to the noise that is generated by the individual, actively driven fan wheel and/or by its associated drive per interval or rotational operating phase. If the drive for the respective fan wheel is expediently an electric motor, in particular a brushless, flush-water-resistant glandless motor, such as is also installed in a conventional waste water pump or drain pump of a conventionally designed domestic dishwasher, an electrical power consumption (rated power ) preferably between 40 W and 80 W, in order to generate an air flow through the respective fan wheel at a propulsion speed preferably of about 9 m/sec-15 m/sec for in particular about 10 seconds to 15 seconds. With four electric motors for four fan wheels, which are assigned to the four quadrants of the total recording area of the loading unit, this results in relation to the total period of time respective blow-off operating phase, a total electrical power consumption preferably between 160 W and 320 W. This corresponds to a total electrical energy consumption preferably only between 1600 Wsec and 4800 Wsec with an assumed individual fan running time, in particular of about 10 seconds (seconds) to 15 seconds during the respective blow-off operating phase. Due to the temporally selective, ie individual rotational operating phases of the several fan wheels divided into a number of intervals of the respective blow-off operating phase corresponding to their number, it is sufficient to provide a power module that is only designed for the electrical energy supply of the respective individually active electric drive motor. In the case of an electric drive motor with a given nominal power, such as about 80W, this means that the electric power module only needs to be designed to deliver this nominal power to this electric drive motor and not to deliver the sum of the nominal electric powers of all drive motors. Due to the sequential sequence of the rotational operating phases of the several fan wheels, the transmission of electrical power to the electric drive motor of each fan wheel, in particular via an electric power module of the household dishwasher, which can preferably be provided inside the washing compartment, if necessary also outside the treatment compartment, on the opposite accumulated total rated power of the electric drive motors of all fan wheels lower rated power of the individual, respectively active electric drive motor limited and therefore easier to implement than in the case that the electric drive motors of all fan wheels would run simultaneously during the blow-off operation phase.

According to a further expedient development of the invention, protection against accidental contact, such as a cage or protective grille, can be provided for the respective fan wheel, in particular at its air inlet opening and/or air outlet opening. As a result, mechanical damage and/or blockages of the respective fan wheel are largely avoided.

According to an advantageous development of the invention, a control unit, in particular a control and/or regulating unit, of the household dishwasher according to the invention can drive the respective fan wheel in addition to the respective blow-off operating phase of the wash cycle of a dishwasher program to be carried out for air movement in at least one further process phase of the rinsing cycle and/or for at least one process step outside of the rinsing cycle and operate for a specified period of time. It controls at least one parameter of the drive, in particular the electric drive motor, of the respective fan wheel in such a way that it rotates at a desired target speed or according to a desired speed profile.

For example, after the blow-off operating phase of the wash cycle has been carried out, which is carried out after the end of the liquid loading operation carried out by means of the at least one washing device of the last liquid-carrying partial wash cycle, in particular the final rinse cycle, the rinse cycle, and/or during an initial section of the subsequent drying cycle of the wash cycle, operate the drive for the respective fan wheel in such a way that the respective fan wheel rotates in the drying cycle during at least one convection operating phase at a speed which is lower than the speed of the respective fan wheel in the preceding blow-off operating phase. Such a forced circulation of moist air and/or water vapor in the treatment room can in particular favor the condensation of moisture from the moist, hot air on a cold wall surface, such as on a side wall of the washing compartment. If drying is supported by a gap in the door opening, the hot, humid air and/or water vapor can be blown out of the treatment room through an opening gap between the door and the washing compartment by means of the respective rotating fan wheel. The fan wheel can also be made to rotate if an exchange of air with ambient air, e.g. via a door gap or a specially provided air duct, is required to eliminate bad odors in the washing area. This can be the case, for example, when the dishwasher is idle and no dishwashing program is running. In these cases, which each work with forced convection, a rotational speed of preferably less than 4500 revolutions/minute is sufficient for the rotational operation of the respective fan wheel.

The invention also relates to a method for operating a household dishwasher which has a washing compartment, in whose treatment space at least one loading unit for receiving items to be washed is accommodated, and at least one washing device for loading the treatment space rinsing liquid, with one or more fan wheels provided in the treatment chamber of the rinsing container above the loading unit being driven in rotation in at least one blow-off operating phase in such a way that the respective fan wheel sucks air out of the treatment chamber, accelerates it and, starting from this fan wheel, moves it forward in the treatment chamber as an air flow downwards which impinges on a spacious blow-off area on the upper side of the loading unit arranged below the fan wheel and largely blows off any items of washware stored there from the top side of the washing liquid, and wherein the respective fan wheel is driven in rotation by a drive assigned to it in the respective blow-off operating phase in such a way that the air flow generated in it with a propulsion speed of at least 5 m/sec, in particular between 8 m/sec and 20 m/sec, preferably between 9 m/sec and 15 m/sec, on the w spaced blow-off area on top of the loading unit arranged below the fan impeller.

In particular, it can be expedient if, when there are several fan wheels provided in the treatment room, in particular four fan wheels assigned to the quadrants of the upper dish rack, these several fan wheels are driven individually one after the other, i.e. sequentially or gradually rotating, during the respective blow-off operating phase. Disturbing air turbulences, in particular air flow cancellations or air flow short circuits, preferably in the intermediate area between adjacent fan wheels, are largely avoided due to the rotational operation of the several fan wheels separated in time. In other words, the air flows generated by the several fan wheels at separate times remain largely unaffected by one another.

If each fan wheel is assigned a drive motor, in particular an electric drive motor, this chronological splitting of the individual fan running times of the fan wheels over the entire duration of the respective blow-off operating phase advantageously requires less electrical power than if the electric drive motors of all fan wheels are viewed over time be operated simultaneously over the entire duration of the blow-off operation phase. Due to the time-separated individual operation of each of the fan wheels, the transmission of electrical power to the electric drive motor of each fan wheel, in particular via an electric Energy supply module or a power module of the household dishwasher, which can preferably be provided inside the washing chamber, but possibly also outside the treatment room, simplified. In the case of a cable feed, it is sufficient to have a smaller line cross-section of the electrical feed supply line to the power module and of the respective distribution line leading from the latter to the respective electric drive motor. The time-separated individual operation of each fan wheel during the respective blow-off operating phase is particularly advantageous, for example, in the case when the electric drive of the respective fan wheel receives its electrical energy supply from a rechargeable electrical energy store. Because then an electrical energy store with a relatively low energy storage capacity is sufficient, in particular of a maximum of 5000 Wsec with an assumed individual fan running time of around 10 seconds (seconds) to 15 seconds, which means that it only takes up little space. Such an electrical energy store can in particular also be attached to the frame on which the fan wheels are held in the treatment room. In the case of contactless energy transmission, for example inductively, between an energy supply module or power module of the household dishwasher provided outside the treatment room and a rechargeable energy store in the treatment room, a smaller primary and secondary coil is sufficient.

It may be advantageous if the speed of the respective fan wheel provided in the treatment room is varied during its respective rotational operation, in particular during its selectively assigned runtime section in the blow-off operating phase or over the entire runtime of the blow-off operating phase. As a result, the air flow generated by the respective fan wheel during its rotational operation can be changed in terms of its flow rate over the running time of the respective fan wheel. In particular, it can be expedient if the respective fan wheel is driven in rotation by means of a drive assigned to it in such a way that its speed alternates between an upper and a lower target speed value. This pulsating speed change causes the flow impulse of the generated air flow to pulsate. Through this dynamic variation of the flow impulse of the air flow, the liquid that is in a depression on the upper side of a washware item can be pushed out of it in an improved manner and made to run off. Because in the interval between the occurrence two maxima of the flow impulse, the residual liquid that could not be pushed over the edge of the depression of the item of washware to be blown off on the top side with the first flow impulse, but remained "hanging" there, can run back from the outer edge of the depression to the bottom, collect there, and then this accumulation of residual liquid can be transported over the edge of the depression to the next maximum with the next increase in the flow pulse. This improves the efficiency with which the amount of liquid standing in the depression of the respective item of washware can be removed from it.

It may be expedient if the respective fan wheel is driven in rotation, particularly during the running time section assigned to it in the respective blow-off operating phase, in such a way that its speed is increased following an increasing speed ramp to a target speed. Specifically, it ramps up speed from zero rpm to a maximum speed, holds it for a predetermined amount of time, and then ramps back to zero rpm. As a result of this increase in speed, the liquid that is in a depression on the upper side of a piece of washware can be conveyed with momentum over the edge of the depression.

It may be advantageous if, when there are several, in particular four, fan wheels provided in the treatment room, these several fan wheels are each driven to rotate at different target speeds during their running times. As a result, the air flows generated by the fan wheels can be given different flow speeds as additional degrees of freedom. This means, for example, that the speeds of the air flows can be flexibly adapted to different loading situations in different loading zones of the loading unit. For example, the speed of the fan wheel that is assigned to a loading zone of the loading unit that is intended for items to be washed, such as espresso cups with smaller depressions in their bases, can be selected to be lower than the speed of the fan wheel that is assigned to a loading zone of the loading unit that is intended for Washing items such as cereal bowls are provided with larger depressions in their bases.

The changes in the speed of the respective fan wheel are expediently carried out by a control unit, in particular a control and/or monitoring unit, which changes at least one parameter of the drive assigned to the respective fan wheel. If the drive is an electric drive motor, the control unit can in particular vary its electric feed current and/or feed voltage.

Each fan wheel is preferably assigned its own individual drive. If there are several fan wheels, they are individually coupled to a number of drives that is equal to their number.

Alternatively, the number of drives can be less than the number of fan wheels. Then at least one of the drives can drive several fan wheels in rotation together. In particular, if necessary only a single drive can be provided, which is then coupled to all the fan wheels at the same time, i.e. jointly.

An electric drive motor is preferably provided as the drive, by means of which the respective fan wheel can be rotated. This can be an electric motor coupled specifically to the drive shaft of the respective fan wheel. Alternatively, an electric motor that is already present in the domestic dishwasher, such as the electric motor of the circulation pump or the electric motor of the drain pump, can be connected, in particular via at least one coupling device, to the drive shaft of one fan wheel to drive it in rotation or to the drive shafts of several fan wheels to drive it in rotation. Optionally, instead of an electric drive motor, a fluidic drive device such as a hydraulic drive device or pneumatic drive device, a magnetic drive device, or another drive device such as a water turbine can be provided for the fan wheel to be driven in rotation. For example, the circulating pump could also drive a water turbine during its liquid circulating operation and generate electrical energy that is temporarily stored in an electrical energy store. This temporarily stored electrical energy is then available in the desired blow-off operating phase and/or other air movement phase for driving the electric drive motor assigned to the respective fan wheel.

The invention also relates to a device with one or more fan wheels for installation in the treatment chamber of a household dishwasher, the one or more fan wheels being designed according to at least one of the preceding embodiments and/or according to at least one of the claims. This device can preferably have a frame or a holding framework on which the one or more fan wheels are held or attached. In addition, according to an advantageous development, one or more, in particular electric, drive motors of the one or more fan wheels, one or more power supply lines that lead to the electric motor or to the electric motors of the one or more fan wheels, and/or a control unit for the Operating the one or more drives can be provided. This frame is preferably designed to be accommodated above the loading unit to which water is to flow, in particular above an upper crockery basket in the washing container.

The advantageous embodiments and developments of the invention explained above and/or reproduced in the subclaims can be used individually or in any combination with one another, except, for example, in cases of clear dependencies or incompatible alternatives.

Other developments of the invention are given in the dependent claims. The invention and its advantageous developments are explained in more detail below with reference to drawings.

Figur 1

in schematischer Darstellung ein erstes Ausführungsbeispiel einer erfindungsgemäß konstruierten Haushaltsgeschirrspülmaschine, in deren Behandlungsraum mehrere, insbesondere vier, rotierend antreibbare Lüfterräder zur Durchführung mindestens einer Abblasbetriebsphase während eines durchzuführenden Geschirrspülprogramms vorgesehen sind,

Figur 2

als Einzelheit von Figur 1 in schematischer Draufsicht ein Gestell, an dem die mehreren Lüfterräder im Behandlungsraum der Haushaltsgeschirrspülmaschine von Figur 1 gehaltert sind,

Figur 3

in schematischer Draufsicht betrachtet eine Besteckschublade, bei der in der linksseitigen Teilhälfte (von vorne betrachtet) zwei rotierend antreibbare Lüfterräder und in der rechtsseitigen Teilhälfte eine Ablagevorrichtung für Besteck und/oder für Kleingeschirr oder sonstige Haushaltsutensilien wie z.B. Espressotassen, Salatlöffel, Eierbecher, usw. vorgesehen ist,

Figur 4

in schematischer Darstellung ein modifiziertes vorteilhaftes Ausführungsbeispiel einer erfindungsgemäß konstruierten Haushaltsgeschirrspülmaschine, bei der mehrere rotierend antreibbare Lüfterräder im Behandlungsraum des Spülbehälters an dessen Deckenwandung zusammen mit ihren zugeordneten elektrischen Antriebsmotoren angebracht sind,

Figur 5

in schematischer Darstellung ein weiteres abgewandeltes Ausführungsbeispiel einer erfindungsgemäß konstruierten Haushaltsgeschirrspülmaschine, bei der mehrere rotierend antreibbare Lüfterräder im Behandlungsraum des Spülbehälters an dessen Deckenwandung angebracht sind, ihre zugeordneten elektrischen Motoren jedoch an der Außenseite der Deckenwand des Spülbehälters angeordnet sind,

Figur 6

in schematischer Draufsicht ein weiteres Ausführungsbeispiel einer erfindungsgemäß ausgebildeten Haushaltsgeschirrspülmaschine, bei der ein einzelnes rotierend antreibbares Laufrad an einem rotierend antreibbaren Längsarm montiert ist,

Figur 7

in schematischer Darstellung den zeitlichen Ablauf eines Geschirrspülprogramms, bei dem nach dem Ende des Sprühbetriebs des Klarspülgangs eine Abblasbetriebsphase eingefügt ist, während der die ein oder mehreren Lüfterräder im Behandlungsraum des Spülbehälters zeitlich nacheinander rotierend angetrieben werden,

Figuren 8,9

jeweils in schematischer Darstellung vorteilhafte Drehzahlverläufe der vier Lüfterräder im Behandlungsraum des Spülbehälters der Haushaltsgeschirrspülmaschine von Figur 1, wenn die Lüfterräder während der Abblasbetriebsphase zeitlich nacheinander rotierend angetrieben werden,

Figur 10

in schematischer Darstellung einen Drehzahlverlauf für jedes der vier Lüfterräder im Behandlungsraum des Spülbehälters der Haushaltsgeschirrspülmaschine von Figur 1, wenn alle vier Lüfterräder während der Abblasbetriebsphase gleichzeitig rotierend angetrieben werden,

Figur 11

in schematischer Darstellung ein weiteres vorteilhaftes Ausführungsbeispiel einer erfindungsgemäß ausgebildeten Haushaltsgeschirrspülmaschine, bei der die elektrischen Antriebsmotoren der Lüfterräder mittels eines wiederaufladbarer Energiespeichers mit elektrischer Energie versorgt werden,

Figur 12

ein vorteilhaftes elektrisches Schaltschema zum sequentiellen Betrieb der elektrischen Antriebsmotoren von vier Lüfterrädern, die den vier Quadranten einer Beladeeinheit zugeordnet sind,

Figur 13

schematisch in perspektivischer Darstellung den grundsätzlichen Aufbau der Haushaltsgeschirrspülmaschine der Figuren 1, 2, in deren Behandlungsraum beispielhaft mehrere, insbesondere vier, Lüfterräder vorgesehen sind, wobei die Lüfterräder während einer Abblasbetriebsphase unmittelbar vor und/oder zu Beginn des Trocknungsgangs des Spülgangs eines durchzuführenden Geschirrspülprogramms bei geschlossener Fronttür der Geschirrspülmaschine und während einer nachfolgenden Konvektionsphase bei um einen Lüftungsspalt geöffneter Fronttür rotierend betrieben werden, und

Figur 14

in schematischer Darstellung die zeitliche Abfolge eines ersten Geschirrspülprogramms und eines späteren, zweiten Geschirrspülprogramms, wobei im dazwischenliegenden spülprogrammfreien Stillstandzeitraum eine Lüftungs-/Geruchsbeseitigungsphase durchgeführt wird, während der die ein oder mehreren Lüfterräder der erfindungsgemäßen Haushaltsgeschirrspülmaschine rotierend betrieben werden.

They each show in a schematic representation:

figure 1

a schematic representation of a first exemplary embodiment of a household dishwasher constructed according to the invention, in the treatment chamber of which several, in particular four, rotatably drivable fan wheels are provided for carrying out at least one blow-off operating phase during a dishwashing program to be carried out,

figure 2

as a detail of figure 1 in a schematic plan view of a frame on which the multiple fan wheels in the treatment room of the domestic dishwasher from figure 1 are held

figure 3

A schematic plan view of a cutlery drawer, in which two rotatably drivable fan wheels are provided in the left-hand half (viewed from the front) and a storage device for cutlery and/or small dishes or other household utensils such as espresso cups, salad spoons, egg cups, etc. is provided in the right-hand half is,

figure 4

a schematic representation of a modified advantageous exemplary embodiment of a household dishwasher constructed according to the invention, in which several fan wheels that can be driven in rotation are mounted in the treatment chamber of the washing container on its ceiling wall together with their associated electric drive motors,

figure 5

a schematic representation of a further modified exemplary embodiment of a household dishwasher constructed according to the invention, in which several fan wheels that can be driven in rotation are attached to the top wall in the treatment chamber of the washing compartment, but their associated electric motors are arranged on the outside of the top wall of the washing compartment,

figure 6

a schematic plan view of a further exemplary embodiment of a household dishwasher designed according to the invention, in which a single impeller that can be driven in rotation is mounted on a longitudinal arm that can be driven in rotation,

figure 7

in a schematic representation of the timing of a dishwashing program, in which after the end of the spray operation of the rinse cycle, a blow-off operation phase is inserted, during which the one or several fan wheels in the treatment room of the washing tank are driven in rotation one after the other,

Figures 8.9

each in a schematic representation advantageous speed curves of the four fan wheels in the treatment chamber of the washing compartment of the domestic dishwasher from figure 1 , if the fan wheels are driven in rotation one after the other during the blow-off operation phase,

figure 10

in a schematic representation of a speed curve for each of the four fan wheels in the treatment chamber of the washing compartment of the domestic dishwasher from figure 1 , if all four fan wheels are driven to rotate at the same time during the blow-off operation phase,

figure 11

a schematic representation of a further advantageous exemplary embodiment of a household dishwasher designed according to the invention, in which the electric drive motors of the fan wheels are supplied with electrical energy by means of a rechargeable energy store,

figure 12

an advantageous electrical circuit diagram for the sequential operation of the electric drive motors of four fan wheels, which are assigned to the four quadrants of a loading unit,

figure 13

schematic perspective view of the basic structure of the domestic dishwasher figures 1 , 2 , in the treatment chamber of which several, in particular four, fan wheels are provided, for example, with the fan wheels during a blow-off operating phase immediately before and/or at the beginning of the drying cycle of the wash cycle of a dishwashing program to be carried out with the front door of the dishwasher closed and during a subsequent one Convection phase are operated in rotation when the front door is open by a ventilation gap, and

figure 14

a schematic representation of the chronological sequence of a first dishwashing program and a later, second dishwashing program, with a ventilation/odor elimination phase being carried out in the intervening period when there is no washing program, during which the one or more fan wheels of the household dishwasher according to the invention are operated in rotation.

Elements with the same function and mode of action are in the Figures 1 - 14 each provided with the same reference numerals. In this case, only those components of a household dishwasher are provided with reference symbols and explained which are necessary for understanding the invention.

figure 13 shows a first advantageous exemplary embodiment of a domestic dishwasher GV, which is designed according to the construction and functional principle according to the invention, schematically in a perspective representation viewed obliquely from the front. It includes a rinsing tank SB with a loading opening on the front. When looking from the front through the loading opening into the treatment space or interior BR of the washing compartment, the washing compartment SB has an essentially rectangular outline. The washing compartment consists of a (viewed from the front) left, preferably vertical side wall SW1, a (viewed from the front) right, preferably vertical side wall SW2, a preferably vertical rear wall RW, and a preferably essentially horizontal top wall DW and a preferably essentially horizontal bottom wall BW (see figure 1 ) together. The front loading opening of the washing container SB can be closed by a front door DO on its front side. This front door DO is in figure 13 shown in a partially open position and then at an angle to the vertical. In its closed position, however, it stands upright. To open it, it can be pivoted forwards and downwards in the direction of arrow AR about a lower horizontal axis, which extends essentially parallel to the lower edge of the washing compartment in the transverse direction or width direction of the domestic dishwasher.

If the front door DO is fully open, it assumes an almost horizontal position in its open end position.

If the front door DO is brought into its final closed position, a treatment space BR is enclosed or delimited by it and by the walls of the washing compartment. One or more loading units are accommodated in this treatment room BR. Here in the exemplary embodiment, this is in particular a lower crockery basket (lower basket) UK and an upper crockery basket (upper basket) OK which is offset relative to this with a clearance distance in the height direction. The respective crockery basket UK, OK can be designed to be preferably movable, in particular movable or withdrawable, in particular for loading and/or unloading from the treatment room. These can be expediently provided in each case a pull-out system that in the figure 1 is omitted for clarity and in the figures 4 , 5 is shown schematically simplified for the upper basket OK and denoted by AS. The respective crockery basket UK, OK is used to hold items to be washed with washing liquid and then dried, such as crockery, drinking vessels (such as glasses, cups, etc...), pots, bowls, cutlery, cooking utensils, etc. In particular, more sensitive items to be washed, such as drinking vessels, fruit or muesli bowls, dessert bowls and other small household items, are usually stored in the upper crockery basket. At least one washing device is provided for loading the treatment chamber BR with rinsing liquid SF. For example, as in the figure 1 shown below the lower dish rack UK a rotatably mounted lower spray arm US and below the upper dish rack OK an upper, rotatably mounted spray arm OS can be provided. In addition to or independently of this, other types of washing devices such as, for example, one or more fixed or movable nozzles for charging the treatment space BR with rinsing liquid can also be arranged in the latter. These and their associated supply lines have been omitted here for the sake of graphic simplicity.

The household dishwasher GV can be designed as a stand-alone, or as a so-called partially integrated, or as a fully integrated household appliance. The one or more walls of the washing compartment and/or the door can expediently be covered on the outside with one or more deadening layers, sound insulation layers, Reinforcement elements, force transducers, a water inlet system, heat exchangers and other functional components. In particular, to complete the body of the appliance, the domestic dishwasher can have an outer housing GH, partially or completely, on the outside all around its washing container SB, as is shown in FIG figure 13 is shown. This is favorable for standing devices. In the case of a built-in appliance that is designed for installation in a niche or in a kitchen cabinet of a kitchenette, the outer housing can be partially or completely omitted. The door DO can be equipped with a furniture panel or furniture plate on the front.

The rinsing tank SB is preferably arranged on a base support or base BT, in which one or more functional elements provided for the liquid loading operation and/or drying operation, such as a circulation pump CP, a drain pump DP, a water switch WS, a control unit CO1, etc... .

In the treatment chamber BR, to which washing liquid is applied during washing operation, several fan wheels that can be driven in rotation, here in the exemplary embodiment in particular four fan wheels LR1 - LR4, are now arranged at a predetermined height distance above or above the upper crockery basket OK according to the design and functional principle according to the invention. In the perspective view of figure 13 only the two front fan wheels LR2 and LR3 are visible from the four fan wheels. The four fan wheels LR1 - LR4 are preferably held on a frame GS. This frame GS can in particular be provided instead of a cutlery drawer BS arranged above the upper crockery basket OK or be formed by the cutlery drawer itself. A specifically assigned protection against accidental contact, in particular a cage or protective grille, is provided for the respective fan wheel LR1 - LR4, preferably at its air inlet opening and/or air outlet opening. Alternatively, a common protection against accidental contact can be provided for all fan wheels. The protection against accidental contact is in the figure 1 indicated by dash-dotted lines and designated BSU.

figure 1 shows a schematic front view of the washing compartment SB of the domestic dishwasher GV in FIG figure 13 in detail. The front door DO and the outer housing GH are the Household dishwasher GV omitted for simplicity. The viewing direction starts from a position of a user who is standing in front of the domestic dishwasher GV, in the depth direction into the treatment space BR. In the schematic front view of the figure 1 only the two front fan wheels LR2, LR3 are visible. For this purpose, the two fan wheels LR1, LR4 are arranged offset in the depth direction in the treatment chamber BR, which can be seen from the schematic top view image in FIG figure 2 becomes clear.

The lower spray arm US is freely rotatable below the lower rack UK and the upper spray arm OS is freely rotatable below the upper rack OK. Both the lower spray arm US and the upper spray arm OS emit washing liquid spray jets, in particular from bottom to top, during their spraying operation and rotate in the process. For this reason, items of washware to be cleaned are usually placed in the lower basket UK and in the upper basket OK upside down compared to their normal position of use, i.e. upside down, with their cavities soiled by food and/or drinks facing down. In the lower rack UK, larger items of washware such as e.g. pots, pans, large plates, large bowls are usually placed, while in the upper rack OS, on the other hand, smaller items of washware such as e.g. or other small items of crockery such as pots, egg cups and/or cooking utensils such as cooking spoons, salad servers, ice cream scoops, etc. If necessary, the upper crockery basket OK has a laterally outwardly inclined storage slope SE1 in the area of its left side wall, as well as a laterally outwardly inclined storage slope SE2 in the area of its right side wall, as here in the exemplary embodiment. These storage bevels SE1, SE2 are used for the advantageous sloping storage of drinking vessels such as glasses and/or cups, since the rinsing operation, during which washing liquid is sprayed in the treatment chamber BR by means of at least one washing device such as the upper spray arm OS, runs off better from the tops of the drinking vessels can.

The items to be washed which are placed upside down, ie turned upside down in relation to their normal use position in the upper rack OK, often have one or more indentations such as a trough, sink, groove or other cavity on the upper side. Such washing items are in particular cups or Drinking glasses, each of which has a peripheral rim on its base with a recess that is enclosed by the rim and is in particular mostly flat. Bowls, bowls and/or other items of crockery and/or small items of crockery such as pots, egg cups and/or cooking utensils such as wooden spoons, pots, etc. can also be placed in the upper crockery basket OK after they have been placed upside down are upcoming soils each have a depression.

When carrying out the one or more liquid-carrying partial wash cycles of a dishwashing program, washing liquid is distributed, in particular sprayed, in the treatment chamber BR by means of at least one washing device, as here in the exemplary embodiment through the lower spray arm US and/or the upper spray arm OS. When the respective liquid-carrying partial wash cycle is carried out, washing liquid can therefore collect in the depression on the upper side of the respective washware item and remain there after the end of the washing liquid distribution operation or washing liquid loading operation. Furthermore, washing liquid can also remain in the depressions on the upper side of items to be washed which are placed in the upper dish rack in their usual position of use. This can be, for example, salad servers, soup spoons, bowls, espresso cups, etc.

A water inlet system WES is provided in order to be able to admit fresh water FW into the washing container SB for the respective liquid-carrying partial wash cycle of a dishwashing program to be carried out. This is in the figure 1 for the sake of graphic simplicity, only indicated schematically and only greatly simplified. It can preferably include a water inlet valve that can be connected to a house water supply line, a water inlet hose, a free flow section, a softening system, and a heat exchanger. In particular, the heat exchanger can be formed by a reservoir that is filled with cold fresh water for the drying cycle of a dishwashing program that concludes the washing cycle. This reservoir is in particular in heat-conducting contact with at least one wall of the washing compartment SB. As a result, this wall can be kept colder than the treatment chamber BR, which means that the condensation of moisture from the moist, hot air/water vapor mixture that occurs after the end of the last liquid-carrying partial wash cycle, in particular the final rinse cycle, of the respectively to be carried out dishwashing program is present in the treatment room, and thus the drying of the items to be washed is favored in the treatment room BR.

By means of the water inlet system WES, a desired quantity of preferably softened fresh water is preferably admitted into the washing container SB for the respective liquid-carrying partial wash cycle of a dishwashing program to be carried out. This collects in a collection point that is lower than the bottom wall BW of the washing container SB, in particular a pump sump SU. This pump sump SU is connected to a circulating pump CP in a liquid-conducting manner, for example via an intake pipe WL3. The rinsing liquid is supplied to the lower spray arm US and the upper spray arm US by means of the circulating pump CP via supply lines WL5, WL6. If necessary, the circulating pump CP can be assigned a water diverter or other switching device with which the liquid supply to the supply line WL5 leading to the lower spray arm US and to the supply line WL6 leading to the upper spray arm OS can be selectively selected. Here in the embodiment of figure 1 the water switch WS is arranged downstream of the circulating pump CP via a connecting line WL4 (viewed in the direction of flow of the circulated washing liquid). If necessary, the reversing device can also have a setting in which the washing liquid conveyed by the circulating pump CP is conveyed to both feed lines WL5, WL6 at the same time. The water switch or reversing device can also direct the flow of liquid to one or more other washing devices, such as one or more fixed or movable nozzles, in particular to a roof shower or to a roof gyroscope via one or more branches on the existing supply lines WL5, WL6 and/or via Check one or more supply lines that go out from the circulating pump and/or its assigned water switch, in particular establish or remove them again.

After the end of the spraying operation of the respective liquid-carrying partial wash cycle of the respective dishwashing program to be carried out, used washing liquid is partially or completely pumped out of the treatment chamber BR, in particular the pump sump, of the washing container SB by means of a drain or waste water pump DP via a waste water line WL2 during an end section of this partial wash cycle. the Drainage pump DP is fluidic, here in the exemplary embodiment connected to pump sump SU via an intake pipe or connecting pipe WL1.

The circulating pump CP, the drain pump DP, any water switch WS provided, the pump sump SU, and their associated fluid connection lines are preferably housed in the base support BT.

In order now, after the end of the liquid loading operation of the last liquid-carrying partial wash cycle, in particular the rinsing cycle, of the wash cycle of the respective dishwashing program to be carried out, to blow away to a large extent, in particular blow down, to be able to, the several, in particular four, fan wheels LR1 to LR4 are driven in rotation in at least one blow-off operating phase in such a way that they draw in air from the treatment room, accelerate it and, starting from them, in the treatment room BR, air flows LS1 to LS4 are moved downwards and forwards, which spacious blow-off areas Q1 to Q4 impinge on the upper side of the upper crockery basket OK arranged below the fan wheels LR1 to LR4. In order to be able to drive the fan wheels LR1 to LR4 in rotation, these drives, in particular electric drive motors AM1 to AM4, are assigned. Here in the embodiment of figures 1 , 2 electric drive motors AM1 to AM4 are held in the frame GS. They are coupled to the drive shafts W1 to W4 of the four fan wheels LR1 to LR4.

An electrical power module, in particular in the base carrier BT, is used to supply electrical energy to the circulation pump CP, the drain pump DP, the water diverter WS, the water inlet system WES, the electric drive motors AM1 to AM4, and/or the other electric actuators of the domestic dishwasher during the course of a dishwashing program to be carried out , intended. In addition to this power module, a logic unit, in particular a control/regulation unit, is provided, preferably in the base support BT, with which the electrical components of the domestic dishwasher can be monitored, in particular controlled and/or regulated, during the course of a dishwashing program to be carried out. The power module is preferably connected to the three phases by a connected to the three-phase AC voltage provided by the household power grid. Here in the embodiment of figure 1 the electrical energy supply and the operational control and/or regulation, in particular activation/deactivation, of the various electrical components of the domestic dishwasher are combined in a common control unit CO1. During the course of a dishwashing program to be carried out, this control unit CO1 monitors the operation in particular of the circulating pump CP, the drain pump DP, the water diverter WS, the water inlet system WES and also the electric drive motors AM1 to AM4. This is in the figure 1 for the sake of simplicity by associated action arrows LCP, LDP, LWS, LWES, SL1 to SL4 emanating from the control unit CO1 (see figure 2 ) indicated.

If necessary, a specially provided control unit, in particular an open-loop and/or closed-loop control unit, can be provided for monitoring the operating sequence, in particular switching the electric drive motors AM1 to AM4 on and off. Correspondingly, it can possibly be expedient to provide a specially provided energy supply unit for the electric drive motors AM1 to AM4.

The four fan wheels LR1 to LR4 are positioned above the upper crockery basket OK at a predetermined height distance from it such that one fan wheel LR1 to LR4 is arranged above each of the four quadrants Q1 to Q4 of the roughly rectangular receiving surface of the upper crockery basket OK. This clarifies the figure 2 , which shows a schematic plan view of the frame GS in the washing compartment SB viewed from above. The frame GS is mounted on one or more walls, here in particular the two side walls SW1, SW2, of the rinsing container SB in the treatment room BR via holders AS. If necessary, it is also possible to design the frame GS to be able to be moved out of the treatment room BR by means of a pull-out system such as pull-out rails, or by means of one or more movable components, in particular rollers.

The respective fan wheel LR1 to LR4 is preferably designed as an axial fan, in particular as a propeller or impeller. Here in the embodiment of figure 1 two-bladed propellers or impellers are provided as fan wheels LR1 to LR4. The two The blades of the respective propeller or impeller are arranged offset by about 180° in a line. Each blade of the respective fan wheel LR1 to LR4, designed as an axial fan, has a radial length L that is approximately half the cross-sectional width of the quadrant Q1 to Q4 of the total receiving surface or the total washware storage area of the upper dish rack that is assigned to the respective fan wheel LR1 to LR4 and to be blown off is equivalent to. In other words, the diameter D of the respective fan wheel LR1 to LR4 designed as an axial fan is selected to be approximately equal to the width extension length and/or depth extension length of the respective quadrant Q1 to Q4. The circle of rotation K1 to K4 of the two-bladed propeller or impeller of the respective axial fan wheel LR1 to LR4 is thus delimited tangentially from the outside by the width extension and/or depth extension of the respectively assigned quadrant Q1 to Q4. The circle of rotation K1 to K4 of the respective fan wheel LR1 to LR4 is in the figure 2 each indicated by dotted lines. For example, in a domestic dishwasher with expedient external dimensions of around 60 cm width and 60 cm depth, a loading unit accommodated in its washing compartment SB and which can be moved out of it, such as the upper crockery basket OK, has dimensions of around 48 cm width and 50 cm depth and, preferably, a total storage area associated therewith between 2000 cm ² and 2500 cm ² . If the roughly rectangular storage area of the loading unit, in particular the upper crockery basket OK, is advantageously divided into four quadrants Q1 to Q4 of approximately the same size, and if all four quadrants are assigned an axial fan wheel LR1 to LR4 above, then the respective axial fan wheel expediently dimensioned in such a way that its respective vane has a radial extent (measured radially outward from the axis of rotation of the axial fan wheel) in particular between 8 cm and 13 cm.

During its rotational operation, the respective fan wheel LR1 to LR4 generates an air flow LS1 to LS4 downward onto a spacious or large-area blow-off area Q1 to Q4 on the upper side of the upper crockery basket OK. The respectively desired, spacious blow-off area Q1 to Q4 preferably corresponds in each case to approximately 25% of the total receiving surface or total storage surface of the upper crockery basket OK. In this way, only four fan wheels are sufficient for the flow of air over the entire surface or loading area of the upper crockery basket OK. In the above case of a household dishwasher with appropriate External dimensions of about 60 cm wide and 60 cm deep and an upper crockery basket OK with appropriate dimensions of about 48 cm wide and 50 cm deep, the respective quadrant or blow-off area Q1, Q2, Q3, Q4 preferably has an area between 500 cm ² and 625 cm ² on. This is in each case largely acted upon by the air flow generated by the respectively assigned fan wheel.

For this purpose, the respective fan wheel, such as LR1 to LR4, is preferably designed in such a way that the air flow it generates, such as LS1 to LS4, flows through a spacious or large-area blow-off area, such as Q1 to Q4, on the upper side of the upper crockery basket OK, which is particularly between 20 % and 40%, preferably about 25%, of the top-side total surface area of the upper crockery basket OK. In this way, this air flow can advantageously simultaneously hit or catch a large number of washware items that are placed on the washware storage surface of the upper dish rack OK and in the extended or spacious blow-off area such as e.g. Q1 to Q4 of this fan wheel such as e.g. LR1 to LR4 lie. Due to the uniform impingement of the items to be washed in the respective extensive blow-off area, in particular in the respective quadrant, by the same air flow, the items to be washed are pressed uniformly as a whole with the same contact pressure onto the surface to be washed. This keeps them stable. A one-sided pressurization of the respective item of washware, which could lead to its displacement or even tipping over, is thus largely avoided.

The frame GS has a large number of struts to hold the electric drive motors AM1 to AM4. The energy supply lines and/or control lines for the electric drive motors AM1 to AM4 are also routed along these struts and/or in these struts. The respective axial fan wheel LR1 to LR4 is coupled to its associated electric drive motor AM1 to AM4 via a drive shaft W1 to W4. It is freely rotatable and flush-integrated in the GS frame, or hangs down freely rotatably in relation to it. The respective axial fan wheel is accommodated in the treatment chamber BR in such a way that its rotation circle K1 to K4, described by its wings or blades in ventilation or fan operation, is aligned largely horizontally, i.e. its axis of rotation or its drive shaft W1 to W4 extends essentially vertically . In this way it can be used together with its electric drive motor with a low height requirement, ie with a low installation space height, in particular between 3 and 8 cm, accommodate in the treatment room BR.

The respective fan wheel LR1 to LR4 is driven by the electric drive motor AM1 to AM4 assigned to it in the respective blow-off operating phase, such as ABG (see figure 8 ) expediently driven in rotation in such a way that an air flow LS1 to LS4 with a propulsion speed of preferably at least 5 m/sec, in particular between 8 m/sec and 20/sec, preferably between about 9 m/sec and 15 m/sec, particularly preferably of about 15 m/sec, is blown downwards and impinges on the fan wheel's associated, spacious blow-off area Q1 to Q4 on the upper side of the upper dish rack OK arranged below the fan wheel LR1 with LR4. It has been found that the air flow with such a propulsion speed favorably has such a high flow momentum at the location of the upper rack OK that the amounts of liquid that are present on the upper side of the items of washware stored there, in particular in depressions on the upper side of these items of washware, can be blown down . In order to achieve such a high flow speed of the air flow of the respective fan wheel, it is expediently driven by its electric drive motor in such a way that in the respective blow-off phase of operation it runs at a target speed of preferably at least 5000 rpm, in particular at a target speed of between 5000 rpm and 10000 revolutions/minute, preferably between 6000 revolutions/minute and 8000 revolutions/minute.

This advantageously ensures during the respective blow-off operating phase that the air in the treatment room BR is pressed downwards or accelerated so quickly by the respective fan wheel LR1 to LR4 rotating at such high speed that it causes an air flow with a flow pulse into the treatment room BR is released onto the items to be washed in the upper dish rack, which is sufficient to largely blow off the usual amounts of liquid standing on the top of the items to be washed. With an air flow generated in this way, not only can liquid droplets be blown off the respective item of washware, but also a much larger amount of liquid than the liquid amount of a liquid droplet, in particular a liquid amount or liquid accumulation between 3 ml and 200 ml, can be blown off the respective item of washware. In the figures 1 and 4 the amount of liquid running down from the upper depression VT of the respective washware item SG by being blown off is denoted by WA1.

If necessary, a different assignment of one or more fan wheels to one or more quadrants to be blown off or other zones of the upper crockery basket OK to be blown off can also be expedient. For example, when looking from the front into the treatment chamber BR of the household dishwasher GV, only the two left-hand quadrants Q1 and Q2 of the upper rack OK are available as storage zones for accommodating items to be washed. It is then sufficient if a fan wheel LR1, LR2 is accommodated in the treatment room BR only above these two quadrants Q1 and Q2. This schematically illustrates the figure 3 in a plan view of the frame GS. The right half of the frame GS remains free of fan wheels and can then be designed as a cutlery storage area BA, for example.

In general, it can therefore be expedient if one or more fan wheels are assigned above a first area of the storage area of the loading unit, while no fan wheels are assigned above a second area of the storage area of the loading unit. If a common frame for the one or more fan wheels is provided above the loading unit to be blown off, a first area of the frame is equipped with one or more fan wheels, while a second area remains free of fan wheels. This is then available for other uses. In particular, it can be designed as a cutlery shelf and/or shelf zone for items to be washed, preferably small items.

It may also be sufficient if only a single fan wheel, in particular an axial fan wheel, is accommodated above the upper basket OK in the treatment room BR. This illustrates figure 6 in plan view. The axis of rotation for an arm RA that can be driven in rotation is provided there in the center of the approximately rectangular treatment room BR. The circle of rotation of this arm RA is drawn in as a broken line and labeled RK2. An electric drive motor AM is attached to its outer end, via the shaft of which a fan wheel, in particular an axial fan wheel such as a propeller PP here, can be driven in rotation. The circle of rotation of the propeller PP is also drawn in and labeled RK1. the The two rotation circles RK2 and RK1 are dimensioned in such a way that a superimposed rotation circle RK3 can be traversed by the air flow generated by the fan wheel such as PP, which covers almost the entire storage area of the upper basket OK. The two side walls SW1, SW2 and the rear wall RW of the washing compartment SB preferably run tangentially to the circle of rotation RK3.

As a modification of this, it may be expedient to provide only a single, i.e. single fan wheel, in particular an axial fan wheel, rotatable above the center of the rectangular outline of the upper basket OK. For example, in a household dishwasher with external dimensions of 60 cm wide and 60 cm deep, in which the upper basket has dimensions of about 48 cm wide and 50 cm deep, the individual fan wheel, which is preferably designed as an axial fan wheel, can have a radial blade length between Have 20 cm and 24 cm.

figure 4 shows a further possible alternative in a schematic front view, how the one or more fan wheels, here in the exemplary embodiment the four fan wheels LR1 to LR4, can be accommodated in the treatment room BR. In a modification of the embodiment of figures 1 , 2 and 13 the electric drive motors AM1 to AM4 of the fan wheels LR1 to LR4 are now firmly attached or mounted directly to the ceiling wall DW of the washing compartment SB. The frame GS is omitted here.

According to a further possible modification, the electric drive motors such as AM1 to AM4 of the fan wheels LR1 to LR4 can be arranged, in particular attached, outside, ie outside of the treatment room BR, in particular outside on the top wall DW of the washing compartment SB. Their drive shafts such as W1 to W4 protrude through openings in the top wall DW into the interior of the washing compartment SB. The fan wheels LR1 to LR4 are attached there to the end sections of the drive shafts, such as W1 to W4, which protrude into the interior of the washing container or the treatment space. The openings or passages in the top wall DW are expediently sealed off by means of seals to prevent flushing liquid from escaping. This further advantageous development of the invention is illustrated figure 5 in a schematic front view.

figure 7 shows a schematic representation of the time sequence of the wash cycle SG of a dishwashing program to be carried out, in which after the end of the liquid loading operation, in particular washing liquid spray operation, of the final rinse cycle KG, a blow-off operation phase ABG is inserted, during which, for example, the four fan wheels LR1 to LR4 of the household dishwasher GV of the preceding Examples of example figures 1 , 2 , 13 , 4 , 5 be driven in rotation one after the other. During the wash cycle SG, the following partial wash cycles are carried out one after the other:
First, what is known as a prewash cycle VG is carried out for a predetermined period of time tVE-tVS. For this purpose, a predetermined amount of clean fresh water FW is admitted into the treatment space BR of the washing container via the water intake system WES and/or from a storage container with storage water. This fresh water is conveyed to the lower spray arm US and/or the upper spray arm US by means of the activated circulating pump CP. The washing liquid SF is then sprayed onto the washware items SG in the lower basket UK and/or in the upper basket OK via the spray nozzles of these. The lower spray arm US and/or the upper spray arm OS rotate as a result of the exiting spray jets with the associated flow impulse. This circulation operation of the circulation pump is in the figure 7 labeled UP. Finally, during an end section of the pre-wash cycle VG, the washing liquid used for the pre-wash is partially or completely pumped out of the treatment chamber BR of the washing container SB by means of the drain pump DP. This pumping process is in the figure 7 denoted by AP.

After the pre-rinse cycle VG, a cleaning cycle RG follows during a subsequent time period tRE-tRS. For this purpose, if necessary, fresh water is filled from a storage tank into the treatment chamber BR of the washing tank by means of the water inlet system WES and/or storage water, and the cleaning agent is metered into this. The circulating pump CP is switched on and conveys this water mixed with detergent to the lower spray arm US and/or the upper spray arm OS. This circulating operation is in turn denoted by UP. In order to activate cleaning substances, a heating device is expediently switched on, which brings the rinsing liquid to a required minimum temperature for activating one or more cleaning substances. This heater can be separately in Water circuit may be provided before or after the circulation pump CP. Here in the exemplary embodiment, the heating device is integrated into the circulating pump CP. At the end and/or after the end of the circulating operation UP of the circulating pump CP in the cleaning cycle RG, the washing liquid used is partially or completely pumped out of the treatment chamber BR by means of the waste water pump DP, depending on the degree of soiling. The pumping process is again denoted by AP.

This is followed by one or more intermediate rinsing cycles ZG using water that is as clean as possible. The purpose of the intermediate wash cycle ZG is to wash away any detergent residue still adhering to the items to be washed. The intermediate rinsing cycle ZG extends over a predetermined period of time tZE−tZS. It may not be necessary to heat the rinsing liquid for the intermediate rinsing cycle ZG using the heating device. At the end and/or after the circulation operation UP of the circulation pump CP in the intermediate wash cycle ZG, the washing liquid is again partially or completely removed from the treatment chamber BR of the washing container SB by means of the waste water pump DP, depending on the degree of soiling.

Finally, as the last partial wash cycle carrying washing liquid, the final rinse cycle KG follows for a predetermined period of time tKE−tKS. For this purpose, water mixed with rinse aid is fed to the lower spray arm US and/or the upper spray arm OS by means of the circulating pump CP and sprayed in the treatment chamber BR. If necessary, the washing liquid to which rinse aid has been added can be heated to a required minimum temperature by means of the heating device of the circulating pump CP or a separate heating device in order to promote the subsequent drying cycle through inherent heat drying of the items to be washed. At and/or after the end of the circulating operation UP of the circulating pump CP or the spraying operation of the upper spray arm OS and/or the lower spray arm US in the rinse cycle KG, the washing liquid mixed with rinse aid is pumped off as completely as possible by means of the waste water pump DP. This pumping process is in the figure 7 again denoted by AP.

As soon as the spraying operation of the at least one washing device in the treatment room BR has been stopped towards the end of the final-rinse cycle KG, in particular the spraying operation of the upper spray arm OS and the lower spray arm US stops, in that the circulation operation UP of the circulation pump CP has ended, and the in the upper When the dishes stored in the dish rack OK are no longer exposed to spray jets of washing liquid, the blow-off operating phase ABG can begin. In the exemplary embodiment, the blow-off operating phase ABG thus already starts during an end section tKE−tBS of the final-rinse cycle KG. For this purpose, the electric drive motors AM1 to AM4 of the fan wheels LR1 to LR4 are each operated in rotation one after the other. In other words, the fan wheels LR1 to LR4 are driven individually in rotation according to a sequential sequence during specifically assigned running time sections or individual running times LZ1 to LZ4. For example, initially only the fan wheel LR1 driven by its electric drive motor AM1 generates an associated air flow LS1 in the treatment chamber BR downwards onto the first quadrant Q1 of the upper basket OK during the running time subsection or time period LZ1. After the drive motor AM1 of the first fan wheel LR1 is switched off, the electric drive motor AM2 of the second fan wheel LR2 is switched on later and this is operated alone for a period of time LZ2. The air flow LS2 generated by it alone acts on the second quadrant Q2 of the upper crockery basket OK. After the drive motor AM2 of the second fan wheel LR2 has been switched off, the electric drive motor AM3 of the third fan wheel LR3 is operated alone for a single running time LZ3. The air flow LS3 generated by the third fan wheel LR3 alone then acts on the third quadrant Q3 of the upper dish rack OK. After the drive motor AM3 of the third fan wheel LR3 has been switched off, the drive motor AM4 of the fourth fan wheel LR4 is finally switched on for a single running time LZ4 and operated alone. All other drive motors AM1, AM2, AM3 are switched off. The air flow LS4 generated by the fourth fan impeller alone impinges on the fourth quadrant Q4 of the upper dish rack OK. In the exemplary embodiment, the blow-off operating phase ABG extends over an initial period of the drying cycle TG. In particular, an individual running time or a selectively assigned running time section is preferably between 5 seconds (seconds) and 30 seconds, in particular between 8 seconds and 20 seconds, preferably of about 15 seconds, for the respective fan wheel during the total time period tBE - tBS of the blow-off operating phase ABG . This results in a total running time of the blow-off operating phase ABG, preferably between 20 seconds and 120 seconds, in particular between 32 seconds and 80 seconds, preferably around 60 seconds preferably by 10% to be 20% longer. The blow-off operating phase ABG can thus advantageously be integrated or inserted into the usual timing of the wash cycle SG without significant delays. The drying cycle TG can take place, for example, with the aid of the so-called inherent heat drying of the items to be washed. This is based on the fact that the items to be washed have been heated by hot washing liquid during the washing liquid loading operation of the one or more preceding partial washing cycles, in particular during the cleaning cycle RG and/or rinsing cycle KG. As a result, the rinsing liquid droplets adhering to the items to be washed evaporate and are absorbed by the air in the treatment chamber. Since the washing container walls are cooler compared to the items to be washed and the air/water vapor mixture present in the treatment chamber, the moisture from the air/water vapor mixture condenses out on them. Of course, other drying systems with associated drying processes are also available for drying. These are, for example, condensation drying - also using a heat exchanger - on a side wall of the washing container to cool it down, drying by opening the door at the end of the drying cycle, convection drying with the help of a fan, sorption drying, etc.

Viewed in general terms, the blow-off operating phase ABG is expediently carried out before and/or during an initial section of the drying cycle TG. This ensures that amounts of liquid or accumulations of liquid on the upper sides of the items to be washed, such as in depressions on the upper side, are blown away early and flow off to the bottom of the washing tub. It may therefore be expedient to activate the drain pump DP during the blow-off operating phase ABG and to pump the water that has been blown off in this way out of the dishwasher. This promotes the drying of the items to be washed in the upper basket OK. In this way, it is also possible to dry the depressions on the upper side of items to be washed properly, in particular to avoid drying edges there, which would otherwise result from solid residues in the accumulations of liquid. In particular, the items to be washed can be largely dried completely, so that the user no longer has to manually dry the items to be washed or even pour off the accumulations of liquid that have remained in the depressions on the top of the items to be washed into the kitchen sink is required. In particular, when unloading the items to be washed after the end of the drying cycle TG, the user is spared the accidental tipping of liquids left in the recesses of the items to be washed, which would cause the items to be washed stored in the lower rack UK to become wet or even soiled. In this way, the comfort for the user is significantly increased.

The blow-off operating phase ABG can easily be inserted between the end of the rinsing cycle KG and the start of the drying cycle TG, since its total duration is quite short, in particular less than 120 seconds, preferably less than 90 seconds.

In addition to or independently of the blow-off operating phase immediately before and/or at the beginning of the drying cycle, it may be expedient to carry out a blow-off operating phase after the liquid application, in particular spraying operation, of at least one of the liquid-carrying partial wash cycles, such as the cleaning cycle, which is followed by a further liquid-carrying partial wash cycle, such as eg an intermediate rinse cycle or rinse cycle, below, to carry out. By blowing off amounts of liquid from depressions on the upper side of the wash items that are stored in the respective loading unit, here in the upper basket in the advantageous embodiment, after the end of that phase of the respective liquid-carrying partial wash cycle, while the wash liquid is being transported by the circulation pump to the one or more washing devices, spray arms, in particular, and applied by them to the items to be washed in the one or more loading units, in particular the upper rack and/or lower rack, it is possible to largely prevent residual amounts of used washing liquid from this partial wash cycle getting into the subsequent partial wash cycle carrying washing liquid. If, for example, the indentations on the upper side of the items to be washed that are stored in the upper basket, after the end of that phase of the liquid-carrying cleaning cycle, during the washing liquid by means of the circulating pump to the one or more washing devices, in particular spray arms, are conveyed and from these to the items to be washed in the one or more loading units, in particular the upper crockery basket and/or lower crockery basket, is blown off by means of the one or more fan wheels in a blow-off operating phase, it can be largely avoided that residual water mixed with cleaning agent from the cleaning cycle gets into the final rinse cycle that follows later is carried over, which could impair the effectiveness of the rinse aid there. Furthermore, the best possible removal of residual amounts of liquid from the tops of the items to be washed, in particular from their top depressions, is also advantageous because this avoids an undefined level of washing liquid in the washing container, in particular for the subsequent partial wash cycle carrying washing liquid. By removing such residual amounts of water from the tops of the items to be washed, in particular from their upper-side depressions, by blowing off these residual amounts of water in a subsequent liquid-carrying partial wash cycle, which starts from a defined amount of washing liquid to be heated in the washing container, also do not have to be heated, which means a total of heat energy saves.

figure 8 shows a schematic representation of an advantageous embodiment of a sequential sequence of speed curves DR1 to DR4 of the four fan wheels LR1 to LR4 in the treatment chamber BR of the washing compartment SB of the domestic dishwasher GV figures 1 , 2 , 13 , 4 , 5 in the event that these fan wheels are driven to rotate consecutively during the blow-off operating phase ABG. Each of the fan wheels LR1 to LR4 or its electric drive motor AM1 to AM4 is assigned a running time section LZ1 to LZ4 selectively over the total time tBE-tBS of the blow-off operating phase ABG. Each fan wheel LR1 to LR4 is driven in rotation by the electric drive motor AM1 to AM4 assigned to it during the runtime section LZ1 to LZ4 that is selectively assigned to it in such a way that after its electric drive motor has been switched on, its speed DR (during a controlled run-up phase) ranges from zero rpm to runs up to a target speed ZDR, this target speed is maintained constant for a predetermined period of time, such as between 10 seconds and 20 seconds, and then drops back to zero rpm after its electric drive motor is switched off. In particular, the electric drive motor of the respective fan wheel, and thus the fan wheel it drives to rotate, runs up a speed ramp RA, starting from zero rpm during a short run-up phase, up to a target speed or maximum speed ZDR, and maintains this for a specified period of time, preferably from about 10 sec - 15 sec, constant at, and then ramps back to zero RPM. The target speed ZDR is expediently selected to be at least 5000 revolutions per minute (abbreviated: min), in particular between 5000 revolutions/min and 10000 revolutions/min, preferably between 6000 revolutions/min and 8000 revolutions/min. through the ramp-shaped speed increase, the liquid that is in a top recess of the respective item of washware can be conveyed as a collected amount of liquid with momentum over the outer edge of the recess. This reliably ensures that the quantity of liquid is pressed out of the depression in the respective item of washware by means of the air flow caused by the fan wheel that is driven in rotation.

As a result of these selective, ie asynchronous, rotational operating phases of the several fan wheels LZ1 to LZ4, which are offset in time over the entire duration of the blow-off operating phase ABG, only the drive energy for the electric drive motor AM1 to AM4 of the motor AM1 to AM4 during the running time Section LZ1 to LZ4 to be driven in rotation, individual fan wheel LR1 to LR4 required and does not accumulate the drive energy for the drives of several or all fan wheels at the same time. This simplifies the provision of electrical power or electrical energy supply for the electrical drive motors of the multiple fan wheels LR1 to LR4. Preferably, for the respective fan wheel LR1 to LR4 during the total time tBE - tBS of the blow-off operating phase ABG, an individual runtime or a selectively assigned runtime section LZ1 to LZ4 is preferably between 5 seconds (abbreviated: sec) and 30 seconds, in particular between 8 seconds and 20 sec, preferably between 10 sec and 20 sec, particularly preferably about 15 sec. If, as here in the exemplary embodiment, a single fan wheel LR1 to LR4 is specifically assigned to the four quadrants Q1 to Q4 of the total storage area of the upper dish rack OK, and these four fan wheels LR1 to LR4 are individually, i.e. alone, one after the other in accordance with the above individual running times LZ1 to LZ4 operated, the total running time tBE - tBS of the blow-off operating phase ABG is preferably between 20 seconds and 120 seconds, in particular between 32 seconds and 80 seconds, preferably between 40 seconds and 80 seconds, particularly preferably about 60 seconds the total running time of the blow-off operating phase should preferably be 10% to 20% longer because of any pauses or dead times between the individual running times of the fan wheels. Due to the temporally separate rotational operating phases of the several fan wheels LR1 to LR4 over the entire duration of the blow-off operating phase ABG, disturbing air turbulences of the air flows LS1 to LS4 generated by you, in particular air flow cancellations or Air flow short circuits, preferably in the intermediate area between adjacent fan wheels, largely avoided. This is because the air currents generated by the fan wheels are independent of one another in terms of time. In particular, the noise associated with the selective fan operation is lower than in the case where all fan wheels LR1 to LR4 are driven to rotate at the same time. If, in particular, a brushless, flushing water-resistant glandless motor is provided as the electric drive motor, such as is also used in a conventional sewage pump or drain pump, an electrical power consumption (rated power) preferably between 40 W and 80 W is already sufficient for this in an advantageous manner in order to the respective fan wheel to generate an air flow with a propulsion speed of preferably at least 9-15 m/sec, in particular for about 10 seconds to 20 seconds. With four fan wheels, which are assigned to the four quadrants Q1 to Q4 of the total receiving area of the upper crockery rack OK, there is therefore only a total electrical power consumption, preferably between 1600 W and 4800 W, based on the total duration of the blow-off operating phase ABG. Due to the time-selective individual operation of the several fan wheels LR1 to LR4 during the blow-off operating phase ABG, it is sufficient to provide a power module that is only designed for the electrical power supply of the respectively active, individual electric drive motor. In the case of an electric drive motor with a predetermined nominal power, such as about 80 W, this means that the electric power module only needs to be designed to deliver this nominal power to the electric drive motor. Due to the time-separated individual operation of each of the four fan wheels LR1 to LR4, it is sufficient if the electrical power module (over the entire duration of the blow-off operating phase) only provides the rated electrical power for the individual, actively switched electrical drive motor and transmits it to it.

figure 9 shows opposite figure 8 an alternative speed profile DR1' to DR4' for the four fan wheels LR1 to LR4. The fan wheels LR1 to LR4, which are driven in rotation one after the other during the blow-off operating phase ABG, essentially have the same speed pattern DR1′=DR2′=DR3′=DR4′. The respective fan wheel LR1 to LR4 is driven in rotation by the electric drive motor AM1 to AM4 assigned to it in such a way that its speed DR is between an upper target speed value ZDR1 and a lower target speed value ZDR2 alternates during the individual runtime LZ1 to LZ4 assigned to it selectively. This pulsating speed variation causes the flow impulse of the air flow LS1 to LS4 generated by the respective fan wheel to pulsate. This dynamic variation of the flow impulse of the respective air flow LS1 to LS4 allows the washing liquid that is in a depression VT on the upper side of a piece of washware SG to be pushed out of it in an improved manner and allowed to drain downwards. Because in the interval between the occurrence of two speed maxima or upper target speed values and the associated maxima of the air flow pulses generated, the residual liquid that could not be pushed over the edge of the depression VT of the wash ware part SG to be blown off from the top with the first flow pulse maximum, but rather there " got stuck", run back from the outer edge of the depression VT to its bottom, collect there, and then this residual liquid accumulation is transported over the edge of the depression VT with the next increase in the air flow up to the next maximum, ie second flow impulse maximum. This improves the efficiency with which the amount of liquid standing in the depression of the respective item of washware can be removed from it. In particular, it may already be sufficient if the electric drive motor of the respective fan wheel drives it in rotation during its individual running time in such a way that its speed runs up to the upper target speed value ZDR1 (starting from zero rpm), then to the lower target speed value ZDR2 drops and then runs up again to the upper target speed value ZDR1 and then drops back to zero rpm per minute. Expressed in general terms, the respective fan wheel can therefore be driven by its associated electric drive motor in such a way that its speed runs through two maxima with a minimum in between. The upper target speed value ZDR1 is expediently selected between 6000 rpm and 8000 rpm and the lower target speed value ZDR2 between 2000 rpm and 3000 rpm.

Expressed in general terms, it can therefore be advantageous if the rotational speed of the respective fan wheel provided in the treatment room is varied during its respective rotational operation in its running time section selectively assigned to it in the blow-off operating phase. As a result, the air flow generated by the respective fan wheel during its rotational operation can change in terms of its flow rate over the individual running time of this fan wheel will. This variation in the flow speed of the air flow generated by the respective fan wheel can improve the blowing away or displacement of the quantity of liquid from the depression on the upper side of the respective item of washware.

figure 10 shows a modified speed curve for each of the four fan wheels LR1 to LR4 in a schematic representation in the event that all four fan wheels are driven to rotate at the same time during the blow-off operating phase ABG. According to this advantageous variant, all the fan wheels are simultaneously, ie simultaneously rotating, driven by their electric drive motors AM1 to AM4 during the total period of time tBE-tBS of the blow-off operating phase ABG. Here in the exemplary embodiment, all fan wheels LR1 to LR4 preferably each have the same speed curve DR1″=DR2″=DR3″=DR4″ over the total duration or total running time LZ=tBE−tBS of the blow-off operating phase ABG. Each fan wheel LR1 to LR4 rotates at approximately the same target speed ZDR. Because all four fan wheels LR1 to LR4 are driven in rotation simultaneously or synchronously over the entire period LZ of the blow-off operating phase ABG, all four quadrants Q1 to Q4 of the total receiving area of the upper dish rack OK are simultaneously subjected to four air flows LS1 to LS4. As a result, the total running time LZ of the blow-off operating phase ABG can advantageously be shortened compared to the total running time of the blow-off operating phase in a chronologically consecutive, ie sequential, individual operation of the four fan wheels. In particular, a shortened total running time LZ=tBE−tBE of between 5 and 12 seconds, preferably around 10 seconds, is made possible.

Alternatively, it may be advantageous if, when there are several, in particular four, fan wheels provided in the treatment room, these several fan wheels are each driven to rotate at different target speeds during their running times. As a result, the air flows generated by the fan wheels can be given different flow speeds as additional degrees of freedom. Thus, for example, flexible adjustment of the speeds of the air flows to different loading situations in different loading zones of the upper dish rack is made possible. Thus, the speed of that fan wheel, which is assigned to a loading zone of the upper dish rack, which for items to be washed, such as espresso cups with smaller ones Wells is provided in their bases, be chosen lower than the speed of that fan wheel that is assigned to a loading zone of the loading unit, which is provided for items to be cleaned such as cereal bowls with larger recesses in their bases. The selection of different target speeds for the fan wheels can be advantageous both in the case of successive individual rotation operation of the several fan wheels and in the case of simultaneous rotation of all fan wheels.

figure 12 shows an advantageous electrical circuit diagram for the sequential rotary mode of operation of the electric drive motors of the four fan wheels LR1 to LR4, which are assigned to the four quadrants Q1 to Q4 of the upper dish rack OK. In the exemplary embodiment, the control unit CO1 of the domestic dishwasher GV preferably comprises an electrical power module that generates electrical power for one or more electrical consumers, in particular actuators, of the domestic dishwasher and one or more control and/or regulation signals for activating/deactivating and/or setting the one or more electrical consumers, in particular actuators, provides. It is advantageous if a switching device USV is provided in close proximity to the four electric drive motors AM1 to AM4. Here in the embodiment of figure 12 the switching device USV is arranged together with the electric drive motors AM1 to AM4 and the associated fan wheels LR1 to LR4 in the treatment chamber BR of the washing container SB, which becomes wet. The switching device USV is designed in such a way that it can switch the electrical connections SL1 to SL4 of the electric drive motors AM1 to AM4 on and off sequentially. It is sufficient if only one electric power supply line EVL leads from the electric power module of the control unit CO1 to the switching device USV. The electrical energy supply line EVL and the electrical connecting lines SL1 to SL4 of the four electric drive motors AM1 to AM4 are preferably representative of the three lines of a three-phase alternating current system, which is particularly favorable for brushless, flushing water-resistant glandless motors as electric drive motors. The switch of the switching device UPS symbolized in the figure 12 in an analogous manner, three switches for the three phase lines EVL. In order to be able to selectively switch the respective drive motor AM1 to AM4 on and off again, one control signal train from the logic device in FIG Control unit CO1 for switching device UPS. In the case of a three-phase alternating current system, in which the switching device UPS each have three switches in the three phase lines to the three phase connection lines of the respective electric drive motor, three control lines or a bus system are sufficient, which are or are represented by the control signal line SSL.

In particular, it can be favorable if the frame GS is equipped with the fan wheels LR1 to LR4, to drive them with the associated electric drive motors AM1 to AM4, their electrical connection lines SL1 to SL4 and the switching device USV, so that a common structural unit is formed. This facilitates the installation or assembly of the blow-off device in the treatment space of the respective domestic dishwasher. In addition, warehousing and logistics are simplified.

figure 11 shows a schematic representation of a further advantageous exemplary embodiment of a domestic dishwasher designed according to the invention, in which the electric drive motors AM1 to AM4 of the fan wheels LR1 to LR4 are supplied with electric energy by means of a rechargeable energy store. The rechargeable energy storage is in the figure 11 positioned in the treatment room BR. It is labeled ES. It is attached to the common frame GS together with the drive motors AM1 to AM4 and the fan wheels LR1 to LR4. In order to supply it with electrical energy, it can be particularly useful to provide contactless energy transmission such as, for example, inductively EF. To this end, it can be expedient if a primary coil PS is provided outside the treatment room BR and the associated secondary coil SS is provided in the vicinity of this primary coil PS in the treatment room BR. An electrical supply line EL leads from the secondary coil SS to the rechargeable energy storage device ES. Furthermore, a control unit CO2 is provided, which can also be attached to the frame GS. This control unit CO2 controls and/or regulates the energy store ES and the electric drive motors AM1 to AM4. This is in the figure 11 illustrated by the fact that control and/or energy supply lines V1 to V4 lead from the control unit CO2 to the electric drive motors AM1 to AM4. In particular, the control unit CO2 can include a switching device that connects the electrical energy store ES to the respective electric drive motor AM1 to AM4 in energetically connects in the desired way. In the case of a sequential rotational mode of operation, in particular a sequential activation and deactivation, of the electric drive motors, the control unit CO2 sequentially connects the energy store ES to the electric drive motors AM1 to AM4.

Alternatively, it may be expedient to arrange the energy store ES outside of the treatment room BR, for example on the outer wall of the top wall DW of the washing compartment SB. Instead of contactless energy transmission, it is also possible, in particular, to supply the energy store ES with electrical energy via one or more electrical lines.

Instead of a control unit, which in combination comprises a power module and a control unit, in particular a control/regulation module, it can also be particularly advantageous if the electrical power module and the electrical control unit are separate components from one another.

It may be expedient if a control unit, in particular a control and/or regulating unit, controls the drives of the one or more fan wheels in addition to the respective blow-off operating phase of the wash cycle of a dishwashing program to be carried out for air movement in at least one further process phase of the wash cycle and/or for at least one outside the rinsing process lying process step switches on and operates for a predetermined period of time and switches off again.

The control unit can, for example, after the blow-off operating phase ABG of the wash cycle SG has been carried out after the end of the liquid loading operation carried out by means of the at least one washing device such as US, OS of the last liquid-carrying partial wash cycle, in particular the final rinse cycle KG, the wash cycle SG, and/or during an initial section of the subsequent drying cycle TG is carried out, preferably operate the drive, in particular the electric motor, for the respective fan wheel in such a way that the respective fan wheel in the drying cycle rotates during at least one convection operating phase at a speed which is lower than the speed of the respective fan wheel in the preceding blow-off operating phase is. A The exemplary embodiment illustrates this figure 8 . There, immediately after the end time tBE of the blow-off operating phase ABG in the drying cycle TG, the electric drive motors AM1 to AM4 of the fan wheels LR1 to LR4 are once again for a predetermined period of time tZUE - tZUS once or several times or repeatedly in succession, ie sequentially with a speed DR1*, DR2*, DR3*, DR4* driven, which is lower than the rotational speed DR1 to DR4 of the respective fan wheel in the preceding blow-off operating phase ABG. This second sequential rotation operation sequence of the fan wheels is used in particular to carry out a convection operation phase. During this convection operating phase, the air in the treatment chamber BR is forced to be circulated by the activated fan wheels, which promotes the condensation of moisture from the hot, humid air on a cold wall surface such as a side wall of the washing compartment SB. The convection operating phase can take place over the entire remaining time of the drying cycle TG. This is in the figure 8 symbolized by the timeline KBG*. In particular, however, it can be advantageous to carry out this convection operating phase only during a limited period of time, which is less than the remaining running time of the drying cycle, immediately after the blow-off operating cycle ABG during the drying cycle TG. This shortened convection phase is in the figure 8 symbolized by a shorter timeline KBG. This is favorable because at the beginning of the drying cycle after the blow-off operating phase ABG, the moisture content and/or water vapor content in the air in the treatment room BR is higher than at the end of the drying cycle TG due to the preceding one or more partial rinse cycles with liquid loading operation. In addition, this time limitation of the convection operating phase during the drying cycle TG allows the noise generated by the fans to be kept within limits. The forced circulation of moist air in the treatment room can in particular favor the condensation of moisture from the moist, hot air and/or the water vapor on a cold wall surface, such as on a side wall of the washing compartment or another condensation surface. If drying is assisted by a gap in the door, the moist, hot air and/or water vapor can be blown out of the treatment chamber BR through an opening gap between the door and the washing container by means of the respective rotating fan wheel. This illustrates figure 13 . There the door DO is open by an opening gap during the drying cycle TG. Will the fan wheels LR1 to LR4 are switched on for a convection operating phase, the hot, humid air and/or the water vapor can be forced out of the interior or treatment space BR of the washing compartment SB to the outside. This improves the drying performance of the domestic dishwasher. As a result, the running time of the drying cycle can be shortened. In addition, the surrounding kitchen furniture, such as a top worktop, can be better protected against swelling, since the contact time between the escaping hot, humid air/water vapor and the kitchen furniture can be reduced by the forced air flow (compared to the case without actively running fan wheels). It may be advantageous if the convection operating phase only takes place towards the end of the drying cycle, because the condensation that progresses during the drying period means that there is less hot water vapor/lower relative humidity in the treatment room than at the beginning of the drying cycle. This residual moisture can then be forced out of the treatment room into the environment by opening the door with the fan wheels switched on, without there being problems with condensation moisture on the surrounding kitchen furniture.

Expressed in general terms, after the first sequential rotation of the fan wheels during the blow-off phase of operation, a second sequential rotation of the fan wheels is provided to carry out a convection phase of operation (forced convection), for which the speed of the respective fan wheel is lower than its speed in the blow-off phase of operation. The convection operating phase can extend over a section (like KBG in the figure 8 exemplified by the successive singular speed curves DR1*-DR4*) or over the entire section KBG* of the remaining time of the drying cycle TG, which extends from the end time tBE of the blow-off operating phase ABG to the end time tTE of the drying cycle TG.

Alternatively, it can be expedient to simultaneously drive all fan wheels rotating at a speed that is lower than the speed of the fan wheels during the blow-off phase ABG during the respective convection operating phase that follows the blow-off operating phase ABG in the drying cycle TG. This variant is in the figure 8 indicated by the speed curve DR** drawn without interruption. This speed curve DR ** extends in the embodiment of figure 8 from the End time tBE of the blow-off operating phase ABG over the entire remaining time KBG*= tTE - tBE of the drying cycle TG up to its end time tTE. Alternatively, this convection of the air in the treatment room, which is forced by one or more running fan wheels, can also only take place for a shorter period of time TBG =tZUE(=tTE) - tZUS during the remaining period tTE - tTBE of the drying cycle TG, where TBG <tTE - tBE applies. This shortened time period TBG of forced convection is in the figure 7 illustrated using the speed curve DR*, which is also drawn in dot-dashed lines without any interruptions. It runs only during an end section tZUE - tZUS (=tTE) of the drying cycle TG. This variant can be particularly favorable if during this end section the front door is opened by a gap by an automatic door opening system.

In the cases that work with forced convection, a speed of preferably less than 4500 revolutions/minute is sufficient for the rotational operation of the respective fan wheel.

If necessary, the one or more fan wheels can be driven in rotation after the end of the wash cycle during a standstill phase of the dishwasher in which no dishwashing program is running, if an exchange of air with ambient air, for example via a door gap or a specially provided air duct, is desired to eliminate bad odors in the washing area. This illustrates figure 14 in a schematic representation. In the interval between two consecutive dishwashing programs GP1 and GP2, an additional deodorizing program GBP is provided. For this purpose, the one or more fan wheels are driven in rotation by their associated drives, in particular electric drive motors, and the air that is forced to move as a result is transported out of the treatment room via at least one outlet opening in the washing container and/or the front door and, if necessary, blown through a downstream odor elimination device that is used for filters out or neutralizes unpleasant odors for people.

Claims (18)

1. Household dishwasher (GV) with a dishwasher cavity (SB), in the treatment chamber (BR) of which at least one loading unit (UK, OK) for holding items to be washed (SG) is accommodated, and with at least one washing apparatus (US, OS) for applying washing liquid to the treatment chamber (BR),
   wherein one or more fan wheels (LR1 - LR4) that can be driven in a rotating manner are provided in the treatment chamber (BR) above the loading unit, in particular an upper rack (OK), wherein the respective fan wheel (LR1 - LR4) is driven in a rotating manner in at least one blow-off operating phase (ABG) such that it draws in air from the treatment chamber (BR), accelerates it and moves it forward and downward as an air flow (LS1 - LS4) in the treatment chamber (BR), said air flow (LS1 - LS4) striking a large blow-off region (Q1 - Q4) at the top of the loading unit (OK) arranged below the fan wheel (LR1 - LR4) and largely blowing off quantities of liquid (SF) present on the tops of items being washed (SG) that are supported there, and wherein the respective fan wheel (LR1 - LR4) is driven in a rotating manner in the respective blow-off operating phase (ABG) by an electric drive motor (AM1 - AM4) assigned to it such that the air flow (LS1 - LS4) generated by it strikes the large blow-off region (Q1 to Q4) assigned to the fan wheel (LR1 - LR4) at the top of the loading unit (OK) arranged below the fan wheel (LR1 - LR4) with an advance speed of at least 5 m/s, in particular between 8 m/sec and 20 m/sec, preferably between 9 m/s and 15 m/s.
2. Household dishwasher according to claim 1,
   characterised in that
   the air flow (LS1 - LS4) generated by the respective fan wheel (LR1 - LR4) covers a large blow-off region (Q1 - Q4) at the top of the loading unit (OK), which corresponds to at least 10%, in particular between 20% and 100%, preferably between 20% and 25%, particularly preferably around 25% of the overall top holding surface of the loading unit (OK).
3. Household dishwasher according to one of the preceding claims,
   characterised in that
   the blow-off operating phase (ABG) is performed after the end of the liquid application operation of a liquid-conducting washing sub-cycle (RG, ZG, KG), in particular the last liquid-conducting washing sub-cycle (KG), of the washing cycle (SG) of a dishwashing program to be performed, performed by means of the at least one washing apparatus (US, OS), in particular during an end segment (tKE - tBS) of said liquid-conducting washing sub-cycle and/or during a start segment (tBE - tTS) of the drying cycle (TG) of the washing cycle (SG) terminating said washing cycle (SG).
4. Household dishwasher according to one of the preceding claims,
   characterised in that
   a drive (AM1 - AM4) is assigned to the respective fan wheel (LR1 - LR4), driving it in a rotating manner in the respective blow-off operating phase (ABG) with a target speed (DR) of at least 5000 revolutions/minute, in particular with a target speed (DR) between 5000 revolutions/minute and 10000 revolutions/minute, preferably between 6000 revolutions/minute and 8000 revolutions/minute.
5. Household dishwasher according to one of the preceding claims,
   characterised in that
   if there are multiple fan wheels (LR1 - LR4) provided in the treatment chamber (BR), these multiple fan wheels (LR1 - LR4) are driven in a rotating manner individually one after the other during runtime sub-segments (LZ1 - LZ4) assigned selectively to them in the respective blow-off operating phase (ABG).
6. Household dishwasher according to one of the preceding claims,
   characterised in that
   the respective fan wheel (LR1 - LR4) is configured as an axial fan, in particular as a propeller or impeller.
7. Household dishwasher according to claim 6,
   characterised in that
   the multiple blades, in particular two with a 180° offset, of the respective fan wheel (LR1 - LR4) configured as an axial fan each have a radial length (L), which corresponds to approximately half the cross-sectional width of the blow-off region (Q1 - Q4) assigned to the fan wheel (LR1 - LR4).
8. Household dishwasher according to one of the preceding claims,
   characterised in that
   a fan wheel (LR1 - LR4) is arranged above each of the four quadrants (Q1 - Q4) of the approximately rectangular layout of a holding surface of the loading unit (OK).
9. Household dishwasher according to one of the preceding claims,
   characterised in that
   an electric motor (AM1 - AM4), in particular a brushless and/or washing water-resistant electric motor, is as assigned to the respective fan wheel (LR1 - LR4) as a drive.
10. Household dishwasher according to one of the preceding claims,
    characterised in that
    the one or more fan wheels (LR1 - LR4) are supported on a shared framework (GS), in particular on a cutlery drawer (BS).
11. Household dishwasher according to one of the preceding claims,
    characterised in that
    a controller (CO1) switches on the drive (AM1 - AM4) of the respective fan wheel (LR1 - LR4) and operates it for a predefined time period not only for the respective blow-off operating phase (ABG) of the washing cycle (SG) of a dishwashing program to be performed but also to move air in at least one further process phase (RTG) of the washing cycle and/or for at least one process step (GBP) outside the washing cycle.
12. Household dishwasher according to one of the preceding claims,
    characterised in that
    a touch guard (BSU), in particular a cage or protective grille, is provided for the respective fan wheel (LR1 - LR4), in particular on its air inlet opening and/or air outlet opening.
13. Method for operating a household dishwasher (GV), which has a dishwasher cavity (SB), in the treatment chamber (BR) of which at least one loading unit (UK, OK) for holding items to be washed (SG) is accommodated, and at least one washing apparatus (US, OS) for applying washing liquid to the treatment chamber (BR), in particular according to at least one of the preceding claims, wherein one or more fan wheels (LR1 - LR4) provided above the loading unit (OK) in the treatment chamber (BR) of the dishwasher cavity (SB) are driven in a rotating manner in at least one blow-off operating phase (ABG) such that air from the treatment chamber (BR) is drawn in by the respective fan wheel (LR1 - LR4), accelerated and moved forward and downward from said fan wheel (LR1 - LR4) as an air flow (LS1 - LS4) in the treatment chamber (BR), said air flow (LS1 - LS4) striking a large blow-off region (Q1 - Q4) at the top of the loading unit (OK) arranged below the fan wheel (LR1 - LR4) and largely blowing off quantities of liquid (SF) present on the tops of items being washed (SG) that are supported there, and wherein the respective fan wheel (LR1 - LR4) is driven in a rotating manner in the respective blow-off operating phase (ABG) by an electric drive motor (AM1 - AM4) assigned to it such that the air flow (LS1 - LS4) generated by it strikes the large blow-off region (Q1 to Q4) assigned to the fan wheel (LR1 - LR4) at the top of the loading unit (OK) arranged below the fan wheel (LR1 - LR4) with an advance speed of at least 5 m/s, in particular between 8 m/sec and 20 m/sec, preferably between 9 m/s and 15 m/s.
14. Method according to claim 13,
    characterised in that
    the respective fan wheel (LR1 - LR4) is driven in a rotating manner by means of a drive (AM1 - AM4) assigned to it in a blow-off operating phase (ABG), which is performed after the end of the liquid application operation of a liquid-conducting washing sub-cycle (RG, ZG, KG), in particular the last liquid-conducting washing sub-cycle (KG), of the washing cycle (SG) of a dishwashing program to be performed, performed by means of the at least one washing apparatus (US, OS), in particular during an end segment (tKE - tBS) of said liquid-conducting washing sub-cycle and/or during a start segment (tBE - tTS) of the drying cycle (TG) terminating the washing cycle (SG).
15. Method according to one of claims 13 or 14,
    characterised in that
    if there are multiple fan wheels (LR1 - LR4) provided in the treatment chamber (BR), these multiple fan wheels (LR1 - LR4) are driven in a rotating manner individually one after the other during runtime sub-segments (LZ1 - LZ4) assigned selectively to them in the respective blow-off operating phase (ABG).
16. Method according to one of claims 13 to 15,
    characterised in that
    the speed (DR) of the respective fan wheel (LR1 - LR4) provided in the treatment chamber (BR) is varied during its respective rotation operation, in particular being increased according to a rising speed profile (RA) or being varied between a lower target speed value (ZDR2) and an upper target speed value (ZDR1).
17. Method according to one of claims 13 to 16, characterised in that
    the respective fan wheel (LR1 - LR4) is operated in a rotating manner not only for the respective blow-off operating phase (ABG) of the washing cycle (SG) of a dishwashing program to be performed but also to move air in at least one further process phase (RTG) of the washing cycle and/or for at least one process step (GBP) outside the washing cycle.
18. Method according to claim 17, characterised in that
    after the blow-off operating phase (ABG) of the washing cycle (SG), which is performed after the end of the liquid application operation of the last liquid-conducting washing sub-cycle (KG) of the washing cycle (SG) of a dishwashing program to be performed, performed by means of the at least one washing apparatus (US, OS), in particular during an end segment (tKE - tBS) of the last liquid-conducting washing sub-cycle and/or during a start segment (tBE - tTS) of the following drying cycle (TG) of the washing cycle (SG), the respective fan wheel (LR1 - LR4) is operated in a rotating manner during at least one convection operating phase (KBG) at a speed (DR1* - DR4*), which is lower than the speed (DR1 - DR4) of the respective fan wheel (LR1 - LR4) in the preceding blow-off operating phase (ABG).

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