EP2420175B1 - Dishwasher with a manually adjustable rinsing programme - Google Patents

Description

The present invention relates to a dishwasher, in particular a domestic dishwasher, with a control device in which at least one wash program is stored for executing, in particular control and / or regulation, a wash cycle comprising several wash parts for cleaning and / or drying items to be washed, and with an operating device for entering operating commands for the control device.

Commercially available dishwashers are designed to automatically clean dishes with washing liquid. At the same time, the users of dishwashers have many, sometimes contradicting, requirements for a dishwasher. These include, for example, a high cleaning effect, a high drying effect, low water and energy consumption, a short duration of a wash cycle, but also the avoidance of stains on the cleaned items.

A dishwasher according to the preamble of claim 1 is from DE 100 58 188 A1 known.

The object of the present invention is to provide a dishwasher, in particular a domestic dishwasher, which better meets the requirements of the user.

The object is achieved in a dishwasher of the type mentioned in that at least one operating command for executing one or more adjustment measures on at least one of the washing programs can be entered on the operating device, by means of which the avoidance of stains on the items to be washed and / or the drying result on the Wash ware is improved when performing the wash cycle on the basis of the adapted wash program.

The dishwasher according to the invention preferably has a control device for automatically executing, in particular controlling and / or regulating, operating sequences of the dishwasher. For this purpose, the control device can be designed as a so-called sequence controller, in particular as an electronic sequence controller. You can advantageously additionally or independently for controlling, of course, it can also be designed to regulate and / or otherwise control or influence operating sequences of the dishwasher. In general terms, within the scope of the invention, the control device can thus in particular form a control device with which operating processes, in particular washing programs, can be monitored and / or influenced.

At least one wash program for carrying out or controlling a washing process, also called a wash cycle, for washing items to be washed, in particular for washing dishes, is stored in the control device. Several washing programs are advantageously provided, one of which can be selected and started by the operator. This makes it possible to adapt the sequence of a wash cycle, in particular to the load, to the type of load and / or to the degree of soiling of the items to be washed. For example, in addition to a normal program, an energy-saving rinsing program can be provided which, for example, is optimized for low energy and / or water consumption while accepting a lower cleaning and / or drying effect. As a further example, an intensive wash program can also be provided, which has a higher cleaning and / or drying effect than the normal program, while accepting higher energy and / or water consumption.

The wash program stored in each case can preferably be designed in such a way that the wash cycle controlled by the wash program has several wash parts, in particular at least one pre-wash cycle for pre-cleaning wash ware, at least one subsequent wash cycle for thorough cleaning of wash ware, at least one subsequent intermediate wash cycle for removing soiled Rinse liquid from the items to be washed, at least one subsequent final rinse cycle to avoid stains on the items to be washed and / or to prepare for a subsequent drying step or drying cycle, and / or at least one final drying cycle to dry the items to be washed, in the order listed above. The pre-wash cycle, cleaning cycle, intermediate wash cycle and final rinse cycle are referred to as water-carrying partial wash cycles, since the wash items brought into the wash chamber are each treated with a wash liquid while they are being carried out. During the In the drying cycle, the use of rinsing liquid is generally not intended.

The items to be washed with washing liquid can take place in an essentially closed washing chamber, in particular a washing container, of the dishwasher. The washing chamber can be assigned an inlet valve which enables washing liquid to be poured into the washing chamber. Furthermore, the washing chamber can be assigned a circulating pump for circulating a washing liquid, which enables the washing liquid filled into the washing chamber, for. B. can be taken from a collection device for washing liquid and applied to the items to be washed via a spray system assigned to the washing chamber. A washing liquid is understood here in particular as a liquid which is provided to be applied to the items to be washed in order to clean them and / or treat them in another way. For example, the washing liquid can also be used to heat the items to be washed, which is possible, for example, during a final rinse step in order to prepare for a subsequent drying cycle in which drying is based at least in part on the fact that the washing liquid adhering to the items to be washed evaporates due to the heat stored in the items. what is called self-drying. Alternatively or additionally, the items to be washed can be dried during the drying process by means of an air flow that is as warm and dry as possible, which is generated, for example, with a sorption drying device.

Furthermore, an operating device is provided which is connected to the control device in such a way that a user of the dishwasher can input operating commands to the control device. An operating command is understood to mean information which systematically affects the function of the control device. For example, an operating command for manually selecting a washing program and an operating command for starting a selected washing program can be provided.

In the dishwasher according to the invention, it is now possible to improve the avoidance of stains on the cleaned items to be washed and / or the drying result on the items to be washed, which leads to a special gloss effect on the cleaned items Wash ware leads, especially when it comes to dishes, preferably glass dishes, or cutlery or pots made of metal.

The improvement is achieved by means of at least one adaptation measure to at least one of the washing programs. In this case, the at least one adaptation measure can be carried out manually via an operating command that can be entered on the operating device for carrying out adaptation measures.

In this way, the user can decide for himself on the basis of his individual requirements for each wash cycle whether or not he would like to achieve the special gloss effect on the cleaned items. With the dishwasher according to the invention, the user can weigh up with each wash cycle from his or her individual point of view whether the advantage of the special gloss effect on the items to be washed has the possible disadvantages, such as an increase in the duration of the wash cycle and / or an increase in the water and / or energy consumption of the Wash cycle, predominates.

The flexible use of the dishwasher achieved in this way better meets the requirements of the user.

In addition, an improved gloss effect can be achieved with the dishwasher according to the invention, which was and is not possible in conventional dishwashers. The reason for this is that in the case of a dishwasher in which measures to achieve a glossy effect are already firmly specified at the factory by the manufacturer of the dishwasher and are invariably included in every wash program when the dishwasher is in operation, the measures would have to be limited in such a way that their disadvantages also could then be accepted if a special gloss effect is not even desired on the part of the consumer. In the dishwasher according to the invention, however, such considerations do not play a role, since the possible disadvantages of the adaptation measures do not occur at all if the user does not give or withdraws the operating command intended to activate them to carry out adaptation measures to achieve the desired special gloss effect.

The gloss effect improved in this way means that user requirements are even better met.

The operating command for carrying out adaptation measures to improve the avoidance of stains on the cleaned items to be washed and / or the drying result on the items to be washed can act on one or more of the washing programs provided. With different washing programs, different adaptation measures can be brought about by the operating command. It is also possible to provide several operating commands for carrying out adaptation measures to improve the avoidance of stains on the cleaned items and / or the drying result on the items to be washed, which trigger different adaptation measures in the same wash program so that the intensity of the gloss effect is even more precisely tailored to the needs of the user to be able to adapt.

According to an advantageous further development of the invention, the operating command for carrying out adaptation measures can be entered via an operating element exclusively provided for this purpose. This increases the ease of use, which further meets the requirements of the user. In addition, operating errors can be avoided. The control element can be, for example, a separate button which is arranged on a control panel of the dishwasher. In principle, however, it is also possible to provide operating elements for entering the operating command for carrying out adaptation measures which are already provided for other operating commands. Multifunctional keys, rotary knobs, touchscreens, alphanumeric input units and the like are conceivable.

According to an alternative of the invention, one of the adaptation measures during the wash cycle causes at least one additional partial wash cycle provided as an intermediate wash cycle to be carried out, ie at least two intermediate wash cycles are carried out for the selectively selected "gloss drying" wash cycle. This results in better rinsing of dirt and / or cleaning agents on the items to be washed, which counteracts the formation of stains on the items to be washed and thus leads to a higher gloss on the items to be washed.

According to an alternative of the invention, one of the adaptation measures increases the amount of washing liquid used in a partial washing cycle provided as a rinse cycle, the increase being at least 20%, preferably at least 30%, particularly preferably at least 40%, of the regular or original amount of the respective washing liquid which is intended for a rinse cycle without gloss drying for the rinse cycle. The increase in the amount of washing liquid used in the final rinse cycle leads to an additional dilution of dirt and / or cleaning agent residues contained in the washing liquid, which counteracts the formation of stains on the cleaned wash ware and thus leads to a higher gloss on the wash ware. The minimum values mentioned for increasing the amount already result in a significant improvement in the gloss of the items to be washed.

According to an alternative of the invention, one of the adaptation measures brings about an addition of rinse aid to a washing liquid used there in at least one wash part provided as an intermediate wash. This reduces the surface tension of the washing liquid, so that at the end of the intermediate wash cycle, a larger proportion of the washing liquid mixed with dirt and / or detergent residues runs off and / or drips off the dishes, so that a larger proportion and the dirt and / or detergent residues contained therein can be pumped out, which counteracts the formation of stains on the cleaned items and thus leads to a higher gloss on the items.

According to an alternative of the invention, one of the adaptation measures brings about a lengthening of a heating phase, the lengthening being at least 10%, preferably at least 20%, particularly preferably at least 30%, of the original or regular duration of the heating phase, which is the case with a wash cycle without "gloss drying" is provided, and / or implementation of at least one additional heating phase during a partial wash cycle provided as a final rinse cycle before the addition of rinse aid to a washing liquid used there. Some rinse aids tend to foam heavily in a relatively cold wash liquor at, for example, less than 35 ° C. Particularly when carrying out several unheated intermediate wash cycles, the temperature of the washing liquid in the final rinse cycle, which is critical in terms of foam formation, can be significantly lower. By doing one before adding the rinse aid anyway provided heating phase for the rinsing liquid of the final rinse cycle is extended, which can be provided in particular when self-drying is provided to dry the items to be washed, and / or by providing an additional heating phase prior to the addition of the rinse aid, which is particularly important when the items are to be dried by an in particular dry-warm air flow can be provided, foam formation can be reliably prevented. As a result, the washing liquid of the final rinse cycle can wet the wash ware evenly, which counteracts the formation of stains on the cleaned wash ware and thus leads to a higher gloss on the wash ware.

According to an expedient development of the invention, one of the adaptation measures causes a duration of a partial wash cycle provided as a drying cycle to be extended, the extension being at least 10%, preferably at least 20%, particularly preferably at least 30%, of the original or regular duration of the drying cycle, which is at a wash program without gloss drying is planned. By lengthening the duration of the drying cycle, an improvement in the drying effect is achieved, with hollow vessels such as drinking glasses, in particular, being able to be dried better and the glossy effect becoming more apparent. With the specified minimum values for the extension, there is already a significant improvement in the drying effect.

According to an alternative of the invention, one of the adaptation measures causes a modification of at least one pumping sequence for pumping out a washing liquid of a washing part by means of a drain pump from the dishwasher, with the modified pumping out sequence reducing a residual amount of washing liquid that has not been pumped out. By reducing the residual amount of washing liquid that cannot be pumped off, it is possible, in particular, to reduce the carryover of dirt and / or cleaning agents from the washing liquid used before the pump-out sequence into a washing liquid used after the pump-off sequence. As a result, the dirt content and / or the detergent content of the last washing liquid used in a wash cycle can be reduced, which reduces the formation of stains on the cleaned items to be washed. The cleaned items are given a special sheen, especially when it comes to cutlery or glass dishes.

According to an advantageous development of the invention, the pump-out sequence comprises at least one pump-out phase, during which the drain pump is switched on or runs up in terms of its speed, the modified pump-out sequence comprises at least one additional pump-out phase, during which the drain pump is switched on or its speed starts up, with the additional The pump-out phase is separated from the previous pump-down phase by a pause during which the drain pump is switched off or its speed is reduced, ie is spaced apart in time.

The drain pump is usually designed as a centrifugal pump, in particular as a radial pump, as a half-radial pump or as an axial pump. A centrifugal pump is a flow machine in which the respective liquid is conveyed using centrifugal force by means of a rotating conveying element. The execution of the drain pump as a centrifugal pump leads, improved or differently than, for example, a configuration as a piston pump, to the fact that the function of the drain pump is ensured even when the rinsing liquid to be pumped is heavily soiled.

If such a drain pump is switched on, the amount of washing liquid in the dishwasher initially drops essentially linearly over time while the speed remains the same. If the amount of rinsing liquid falls below a certain residual amount, however, such an amount of air gets into the circulating pump that the pressure for delivering rinsing liquid collapses and consequently no rinsing liquid is delivered any more. In this way, a residual amount of washing liquid that cannot be pumped off during continuous operation of the drain pump remains in the dishwasher.

Surprisingly, it has now been shown that the automatic execution of a pump-out sequence, which, in particular compared to the pump-out sequence used in the wash programs without "gloss drying", comprises at least one further pump-off phase during which the drain pump is switched on, the further pump-off phase being carried out by a pause, while the drain pump is switched off, it is separated from a previous pumping phase, one is not Pumpable residual amount of washing liquid, which is absorbed in the dishwasher, can be significantly reduced.

The effect that leads to a reduction in the remaining amount of flushing liquid that has not been pumped out has not been conclusively clarified. However, it has been shown that when the circulating pump starts up after a pause, a pressure for pumping flushing liquid is built up at least for a short time if the residual amount of flushing liquid that cannot be pumped off by means of the continuous operation of the drain pump is not reached. The effect that leads to a reduction in the residual amount of rinsing fluid that has not been pumped out and which plays no role in the first of the pumping phases due to the still large amount of rinsing fluid there, however, does not only occur in a second pumping phase but also in a third pumping phase and, if necessary, a pumping sequence during further pumping phases. This is surprising insofar as the amount of washing liquid that can also be pumped off when the drain pump starts up should actually have been pumped out after the second pump-off phase. Correspondingly, however, by providing an additional pumping-out phase in the modified pumping-out sequence, a reduction in the residual amount of rinsing fluid that has not been pumped out can be achieved, regardless of whether one or more pumping-out phases are provided in the original pumping-out sequence.

According to an advantageous further development of the invention, the respective modified pumping sequence comprises a total of at least three pumping phases. By carrying out at least three pumping phases, the described effect can be used several times, so that the residual amount of rinsing liquid that has not been pumped off can be reduced particularly significantly. These at least three pumping phases of the respective pumping sequence that follow one another in time with pauses correspond to a “stuttering pumping” of the drain pump.

According to an advantageous further development of the invention, the first of the pumping phases is provided for pumping out at least 80%, preferably at least 90%, particularly preferably at least 95%, of the total amount of the rinsing liquid to be pumped out. This makes it possible, by means of the subsequent pumping-out phases, to effectively reduce the residual amount of washing liquid remaining in the dishwasher.

According to an expedient development of the invention, in the case of the pumping-out sequence and / or the modified pumping-out sequence, the first pumping-out phase of the pumping-out phases is provided for pumping out an amount of rinsing liquid that can be pumped off in continuous operation of the drain pump. In this way it is possible, by means of the subsequent pumping-out phases, to reduce the residual amount of washing liquid remaining in the dishwasher particularly effectively.

According to an expedient development of the invention, a monitoring device is provided for monitoring a flushing liquid flow delivered by the drain pump, with the first pumping-out phase of the pumping-out phases being terminated in the pumping-out sequence and / or the modified pumping-out sequence if the monitoring device means that the flushing liquid flow falls below a minimum value is recognized. If a minimum value for the amount of washing liquid pumped out per unit of time, i.e. for the flow of washing liquid being pumped, is undershot, this indicates that the amount of washing liquid that can be pumped off in continuous operation of the drain pump has essentially been pumped out. If the termination of the first pumping phase is initiated on the basis of this criterion, it can be ensured that on the one hand the amount of rinsing liquid that can be pumped off in the first pumping step is at least substantially reached, and on the other hand that unnecessary duration of the first pumping phase is avoided.

According to an expedient development of the invention, the drain pump has an electric motor, the monitoring unit being designed to monitor at least one electrical operating parameter of the electric motor. This is based on the knowledge that electrical operating parameters of electric motors of lye pumps change characteristically as a function of the flow of flushing liquid being conveyed. This applies, for example, to a drain pump operated with a fixed voltage for its current or power consumption. For example, at a given speed, the power consumption of an air-sucking drain pump is generally well below the power consumption of a drain pump that only sucks up washing liquid. Such a monitoring unit has a simple structure. This is especially true when compared to Monitoring devices that have a special flow meter, such as an impeller meter.

According to an expedient development of the invention, the first pumping-out phase of the pumping-out phases is aborted in the pumping-out sequence and / or the modified pumping-out sequence if the monitoring device detects that the flow of rinsing liquid has not fallen below the minimum value after a predetermined period of time. In this way, it can be prevented that the first pumping-out phase is continued indefinitely in the event of a malfunction of the monitoring device.

According to an advantageous development of the invention, in the pumping sequence and / or the modified pumping sequence, at least one of the pumping phases following the first pumping phase and / or at least one of the pauses is time-controlled. In this way, the intended pumping-out sequence can be implemented in a simple manner, in particular without additional sensors.

According to an expedient development of the invention, at least one of the pauses in the pumping sequence and / or the modified pumping sequence has a duration of at least 1 second, preferably of at least 2 seconds, particularly preferably of at least 4 seconds, and / or of at most 24 seconds, preferably of a maximum of 12 seconds, particularly preferably a maximum of 6 seconds. The specified minimum values for the duration of the breaks are normally sufficient to ensure that the rinsing liquid whirled up in the drain pump in the previous pumping phase reaches a rest position during the respective break, in which at least a brief pressure build-up is possible when the drain pump starts up. The specified maximum values also ensure that the entire pumping sequence does not take longer than necessary.

According to an expedient development of the invention, in the pumping sequence and / or the modified pumping sequence, at least one of the pumping phases following the first pumping phase has a duration of at least 1 second, preferably of at least 2 seconds, particularly preferably of at least 4 seconds, and / or for a maximum of 32 seconds, preferably a maximum of 16 seconds, particularly preferably a maximum of 8 seconds. With the specified minimum values for the duration of the pumping-out phases following the first pumping-out phase, the maximum additional amount of rinsing liquid that can be pumped off when the drain pump starts up can generally be achieved in each of the subsequent pumping-out phases. The specified maximum values also ensure that the entire pumping sequence does not take longer than necessary.

According to an expedient development of the invention, the modification takes place in a pumping sequence at the end of a partial wash cycle provided as an intermediate wash cycle. Especially at the end of a partial wash cycle provided as an intermediate wash cycle, a reduction in the amount of washing liquid not pumped out leads to a reduction in the carry-over of detergent and / or dirt into the last wash liquid of a wash cycle, which is usually the wash liquid of a partial wash cycle designed as a final wash cycle. In this way, the gloss effect on the washed items can be increased particularly effectively.

According to an advantageous development of the invention, the modification takes place in a pumping sequence at the end of a partial wash cycle provided as a cleaning cycle. In this way, it is generally possible to prevent detergent and / or dirt from being carried over into an intermediate wash cycle, so that the washing liquid in this intermediate wash cycle contains less detergent and / or dirt. As a result, further carryover of detergent and / or dirt into the last washing liquid of a wash cycle can be further minimized and the gloss effect on the washed items can be increased.

According to an advantageous development of the invention, the modification is not provided for in a pumping sequence at the end of a partial wash cycle provided as a pre-wash cycle. At the end of a normal pre-wash cycle, there is generally still a large amount of dirt adhering to the dishes. Since this is normally removed in the subsequent cleaning cycle, the possible spread of dirt from the pre-wash cycle into the cleaning cycle due to washing liquid that has not been pumped out is of no consequence. Therefore, it can be used at the end of a pre-wash without any disadvantage there is no need to modify the pumping sequence, which speeds up the execution of the wash cycle.

According to an advantageous further development of the invention, the modification is not provided for in a pumping sequence at the end of a partial wash cycle provided as a final rinse cycle. At the end of a final rinse cycle, the washing liquid used is essentially free of detergent and / or dirt. Therefore, a carryover of cleaning agent and / or dirt into a later wash cycle is only possible to a small extent and not disruptive. Therefore, at the end of a rinse cycle, a modification of the pump-out sequence can be dispensed with without any disadvantage, which further accelerates the execution of the wash cycle.

According to an expedient development of the invention, the drain pump comprises a brushless electric motor, preferably a brushless permanent magnet motor. The brushless electric motor can in particular be designed as a brushless direct current motor, also called a BLDC motor, as a brushless alternating current motor, also called a BLAC motor, or as a synchronous motor. The rotor of the motor can have at least one permanent magnet, whereas the stator has several electromagnets. The electromagnets are commutated via control electronics. In comparison to other possible motor concepts, this enables the motor to start up from standstill in a defined manner, so that the amount of flushing liquid that can also be pumped off in the pump-off phases following the first pump-off phase can be maximized. According to an advantageous further development of the invention, a circulating pump for applying washing liquid to items to be washed is switched off for the entire duration of the pump-out sequence and / or the modified pump-out sequence. This prevents rinsing liquid from being distributed by the circulating pump in the dishwasher during the pumping out sequence and / or the modified pumping out sequence, so that it cannot be pumped out by means of the drain pump.

According to an alternative of the invention, one of the adaptation measures in at least one wash cycle provided as an intermediate wash cycle results in a lengthening of a time span between a circulation sequence Circulation of the rinsing liquid and a pumping sequence for pumping out the rinsing liquid. In this way, a larger part of the washing liquid adhering to the items to be washed can drip off and / or run off, so that a larger part of the washing liquid and the dirt and / or cleaning agent residues it contains can be pumped out, which counteracts the formation of stains on the cleaned items to be washed leads to a higher gloss on the dishes.

According to an advantageous development of the invention, at least one adjustment measure provided when the operating command is entered to carry out adjustment measures is omitted if a dosing device for adding rinse aid to the washing liquid is deactivated, or if a level of rinse aid in the dosing device falls below a minimum level. In the case of manual deactivation of the dosing device for adding rinse aid to the washing liquid or if the user does not fill the dosing device with rinse aid, it can be assumed that a cleaning agent is used in which rinse aid is integrated. These can be so-called multifunctional sticks. These are usually introduced into a metering device for adding detergent and automatically released during a cleaning cycle of a wash cycle. The rinse aid contained therein essentially dissolves in the washing liquid of the cleaning cycle. A small part of the dissolved rinse aid then gets through carry-over, for example via the non-pumpable amount of washing liquid, from wash cycle to wash cycle into the rinse cycle, in order to develop its surface tension-reducing effect there. In order to maintain this desirable carry-over, one or more of the adaptation measures provided can be omitted in order to minimize a deterioration in the gloss effect in the adapted washing program when a separate rinse aid is dispensed with.

For example, an addition of rinse aid to a rinse liquid used there, a modification of at least one pumping sequence for pumping out a rinse liquid of a wash cycle, an increase in the amount of a rinse liquid used in the final rinse cycle, an additional intermediate wash cycle and / or can be added to the intermediate wash cycle an extension of a period of time in an intermediate wash cycle between a Circulation sequence for circulating the rinsing liquid and a pumping sequence for pumping out the rinsing liquid can be dispensed with.

The invention also relates to a method for operating a dishwasher according to claim 9.

The method according to the invention enables flexible use of the dishwasher and a reduction in the formation of stains on the cleaned dishes. Other advantageous developments and / or developments of the invention are given in the subclaims.

The above advantageous developments and / or developments of the invention and the advantageous developments of the invention reproduced in the dependent claims can be provided individually or in any combination with one another in the dishwasher according to the invention.

Figur 1

ein vorteilhaftes Ausführungsbeispiel einer erfindungsgemäßen Haushaltsgeschirrspülmaschine in einer schematischen Seitenansicht,

Figur 2

eine Blockdarstellung der Haushaltsgeschirrspülmaschine von Figur 1,

Figur 3

eine schematische Darstellung eines auf der Basis eines Spülprogramms durchgeführten Spülgangs sowie eines auf der Basis eines angepassten Spülprogramms durchgeführten Spülgangs im Zeitverlauf der Haushaltsgeschirrspülmaschine der Figuren 1, 2,

Figur 4

eine schematische Darstellung einer Abpumpsequenz der Geschirrspülmaschine der Figuren 1 und 2, sowie

Figur 5

eine schematische Darstellung einer modifizierten Abpumpsequenz der Geschirrspülmaschine der Figuren 1 und 2.

The invention and its developments as well as their advantages are explained in more detail below with reference to figures. They each show schematically:

Figure 1

an advantageous embodiment of a household dishwasher according to the invention in a schematic side view,

Figure 2

a block diagram of the household dishwasher of Figure 1,

Figure 3

a schematic representation of a wash cycle carried out on the basis of a wash program and a wash cycle carried out on the basis of an adapted wash program over time in the domestic dishwasher Figures 1 , 2 ,

Figure 4

a schematic representation of a pumping sequence of the dishwasher of FIG Figures 1 and 2 , as

Figure 5

a schematic representation of a modified pumping sequence of the dishwasher of FIG Figures 1 and 2 .

In the following figures, parts that correspond to one another are provided with the same reference symbols. Only those components of a dishwasher are provided with reference numerals and explained which are necessary for understanding the invention. It goes without saying that the dishwasher according to the invention can comprise further parts and assemblies.

Figure 1 shows an advantageous embodiment of a household dishwasher 1 according to the invention in a schematic side view. The dishwasher 1 has a control device 2 in which at least one wash program for controlling a wash cycle for washing items to be washed, in particular dishes, is stored. A number of wash programs are expediently stored so that, by selecting a suitable wash program, the sequence of a wash cycle controlled by the control device 2 can be adapted, for example, to the load quantity, the type of load and / or the degree of soiling of the items to be washed.

The control device 2 is assigned an operating device 3 which is connected to the control device 2 in such a way that a user of the dishwasher 1 can input operating commands to the control device 2. An operating command is understood to mean information which systematically affects the function of the control device. For example, an operating command for manually selecting a washing program and an operating command for starting a selected washing program can be provided.

In the dishwasher 1 according to the invention, it is now possible to improve the avoidance of stains on the cleaned items to be washed and / or the drying result on the items to be washed, which leads to a special shine effect on the cleaned and dried items to be washed, in particular when it comes to dishes, preferably glass dishes, or pots or cutlery made of metal. In the context of the invention, this is referred to as "gloss drying".

The improvement is achieved by means of at least one adaptation measure to at least one of the washing programs. In this case, the at least one adaptation measure can be carried out manually via an operating command that can be entered on the operating device 3 for carrying out adaptation measures.

The operating device 3 can be designed in such a way that the operating command for carrying out adaptation measures can be entered via an operating element exclusively provided for this purpose. This increases the ease of use, which further meets the requirements of the user. In addition, operating errors can be avoided. The operating element can be, for example, a separate button which is arranged on an operating panel of the dishwasher 1. In principle, however, it is also possible to provide operating elements for entering the operating command for carrying out adaptation measures which are already provided for other operating commands. Multifunctional keys, rotary knobs, touchscreens, alphanumeric input units and the like are conceivable.

Furthermore, the control device 2 is assigned an output device 4 which enables messages to be output to the operator. The output device 4 can include display lamps, light-emitting diodes, an alphanumeric display and / or a graphic display for outputting in particular optical messages. Additionally or independently of this, the output device 4 can also have a buzzer, a loudspeaker and / or the like for outputting acoustic messages.

The dishwasher 1 further comprises a washing compartment 5, which can be closed by a door 6, so that a closed washing chamber 7 for washing Wash items are created. The washing container 5 can optionally be arranged inside a housing 8 of the dishwasher 1. In particular in the case of built-in dishwashers, the housing 8 is not required and in some cases can be omitted entirely at the top. In Figure 1 the door 6 is shown in its closed position. The door 6 can be brought into an open position by pivoting about an axis arranged perpendicular to the plane of the drawing, in which it is oriented essentially horizontally and enables items to be washed in and out. In the in Figure 1 The embodiment shown, the operating device 3 is arranged in a user-friendly manner on an upper section of the door 6. The output device 4 is also arranged on the upper section of the door 6, so that optical messages are clearly visible and / or acoustic messages are easily audible. The control device 2 is also positioned there so that the required signal connections between the operating device 3, the output device 4 and the control device 2 can be kept short. In principle, however, it is possible to arrange the operating device 3, the output device 4 and / or the control device 2 at a different location. In particular, according to an alternative embodiment variant, the control device can optionally also be accommodated in a base assembly or in a base support component below the washing compartment. The control device 2 could also be designed in a decentralized manner, which is understood to mean that it comprises spatially separated components which are connected via communication means in such a way that they can interact.

The dishwasher 1 has, for positioning items to be washed, e.g. Dishes have an upper crockery basket 9 and a lower crockery basket 10. The upper crockery basket 9 is arranged on extension rails 11, which are each attached to opposing side walls of the washing container 5 that extend in the depth direction of the washing container. When the door 6 is open, the crockery basket 9 can be moved out of the washing compartment 5 by means of the extension rails 11, which makes it easier to load and unload the upper crockery basket 9. The lower crockery basket 10 is arranged on extension rails 12 in an analogous manner.

The wash program (s) stored in the control device 2 can each provide for several partial wash cycles, for example at least one pre-wash cycle, at least one cleaning cycle, at least one intermediate wash cycle, at least one final rinse cycle and / or at least one in this chronological order Drying cycle. The pre-wash cycle, cleaning cycle, intermediate wash cycle and final rinse cycle are referred to as water-carrying partial wash cycles, since the wash items positioned in the wash chamber 7 are treated with a wash liquid S while they are being carried out. Treatment of the items to be washed with washing liquid S is generally not provided during the drying cycle.

In the present exemplary embodiment, fresh water or inlet water ZW is used as the washing liquid S for treating the items to be washed, which can be taken up by an external water supply device WH, in particular a drinking water supply network, and filled into the washing chamber 7. Typically, at the beginning of each water-carrying partial wash cycle, a washing liquid S formed from fresh inlet water ZW is filled in, which is then discharged to an external waste water disposal device AR as waste water AW at the end of the respective partial wash cycle. But it is also possible to use a washing liquid S of a partial wash cycle e.g. to be stored in at least one storage container (not shown) and to be refilled into the washing chamber 7 in a later partial wash cycle.

The dishwasher 1 of the Figure 1 comprises a water inlet device 13, which is provided for connection to the external water supply device WH. As in Figure 1 The external water supply device WH can be a water tap WH of a building-side water installation, which provides pressurized inlet water ZW. The water inlet device 13 comprises a connection piece 14 which is provided for connection to the water tap WH. The connection can take place, for example, via a thread arrangement, a bayonet arrangement or the like. Downstream of the connection piece 14, a connection hose 15 is provided, which is preferably flexible. The downstream end of the connection hose 15 is connected to a connection piece 16 which is fixed to the housing.

Downstream of the connector 16 fixed to the housing, a supply line 17 is provided, which is connected to an input side of an inlet valve 18 that can be switched by means of the control device 2. An output side of the inlet valve 18 is in turn connected to a liquid inlet 19 of the washing chamber 7. In this way, it is possible by means of the water inlet device 13 to feed water ZW as washing liquid S into the interior of the washing chamber 7 of the dishwasher 1. The inlet valve 18 can be designed as a switchable solenoid valve which only has an open position and a closed position. A water treatment system (not shown), for example a softening system, can be provided in the supply line 17.

Instead of or in addition to the device-side inlet valve 18, an external inlet valve, in particular a so-called aqua-stop valve, can also be provided between the connector 14 and the water tap WH, which can preferably be switched, in particular shut off and opened by means of the control device.

The rinsing liquid S filled into the rinsing chamber 7 via a liquid inlet 19 reaches a collecting device 21 formed on a base 20 of the rinsing container 5, which can preferably be formed as a collecting pot 21, due to its weight. A circulation pump 22 is connected by its inlet 23 to the collecting pot 21 in a fluid-conducting manner. Furthermore, in the exemplary embodiment, an output side of the circulating pump 22 is connected to a spray device 25, 26 via a preferably electrical heating device 24 for heating the washing liquid S, which makes it possible to apply heated washing liquid S to the wash items brought into the washing chamber 7. In the embodiment of Figure 1 the spray device 25, 26 comprises an upper rotatable spray arm 25 and a lower rotatable spray arm 26. However, as an alternative or in addition, fixed spray elements or other spray devices could also be provided.

The rinsing liquid S exiting from the spraying device 25, 26 when the circulating pump 22 is switched on returns to the sump 21 within the washing chamber 7 due to its weight. During the circulation of the washing liquid S in the washing chamber 7, the aim is to operate the circulating pump 22 in a concentric manner. The circulating pump 22 is then in rotation when its inlet 23 is completely filled with rinsing liquid S in cross section, so that only rinsing liquid S, or in other words, no air gets into the interior of the circulating pump 22. By operating the circulating pump 22 in concentricity, on the one hand, a pump pressure that is sufficient for an intended cleaning effect can be achieved and, on the other hand, the formation of disruptive slurping noises can be avoided will. In order to determine whether the circulation pump 22 is running or not, it is assigned a running monitoring unit 27. This can be provided as a separate component or, if necessary, also be part of the control device 2. If, during the circulation of washing liquid by means of the concentricity monitoring unit 27, irregular running of the circulation pump 22 is detected, additional washing liquid S can be poured into the collecting device 21, for example by opening the inlet valve 18, so that the level of washing liquid S in the collecting device 21 increases and the Circulation pump 22 thereby reaches the concentricity.

In addition, the dishwasher 1 has, in a conventional manner, a metering device 28 which enables the washing liquid S introduced into the washing chamber 7 to be mixed with detergents in powder or liquid form in order to improve the cleaning effect of a wash cycle. A further metering device 29 also makes it possible to provide the washing liquid S with, in particular, liquid rinse aid, in particular to avoid staining of the cleaned items and to increase the drying effect of a wash cycle.

Furthermore, the Figure 1 Dishwasher 1 shown has a drain device 30 which is used to pump washing liquid S that is no longer required as waste water AW from the washing chamber 7 to the outside. The drainage device 30 comprises a drain pump 31, the inlet 32 of which is connected to the collecting pot 21. The output side of the drain pump 31, on the other hand, is connected via a non-return valve 33 to a connecting line 34, the downstream end of which is connected to a connection 35 of the dishwasher 1 that is fixed to the housing. A sewage hose 36, which is particularly flexible, is attached to an outlet of the connection 35 fixed to the housing. At the downstream end of the sewage hose 36, a connection piece 37 is arranged, which is provided to connect the drainage device 30 to a sewage disposal device AR. The waste water disposal device AR can be a waste water pipe AR of a building-side water installation. The connection between the connection piece 36 and the sewage pipe AR can be designed as a screw connection, a bayonet connection, a plug connection or the like.

In this way, it is possible to dispense flushing liquid S, in particular contaminated flushing liquid S, no longer required from the collecting device 21 to the waste water disposal device AR, the non-return valve 33, which can be designed as a non-return flap 33, for example, prevents that from the Rinsing liquid S pumped away from the collecting device 21 and / or liquid originating from the sewage disposal device AR reaches the collecting device 21 due to its weight and / or pressure fluctuations in the sewage disposal device AR.

The drain pump 31 is preferably assigned a monitoring device 38 for monitoring an amount of washing liquid S conveyed per unit of time, that is to say for monitoring the flow of washing liquid being conveyed. The monitoring device 38 makes it possible, for example, to recognize when, when pumping washing liquid S from the collecting device 21, the level of washing liquid S in the collecting device 21 has dropped to such an extent that no washing liquid S is conveyed any more.

In the exemplary embodiment, the drain pump 31 has an electric motor, the monitoring unit 38 being designed to monitor at least one electrical operating parameter of the electric motor. This is based on the knowledge that electrical operating parameters of electric motors of lye pumps 31 change characteristically as a function of the flow of flushing liquid being conveyed. This applies, for example, to a drain pump operated with a fixed voltage for its current or power consumption. For example, at a given speed, the power consumption of an air-sucking drain pump is generally well below the power consumption of an exclusively washing liquid-sucking drain pump 31. Such a monitoring unit 38 is simple in construction. This is especially true in comparison to monitoring devices which have a special flow meter, such as an impeller meter.

The electric motor of the drain pump 31 can in particular be a brushless electric motor, preferably a brushless permanent magnet motor. The brushless electric motor can, in particular, be a brushless one Direct current motor, also called BLDC motor, can be designed as a brushless AC motor, also called BLAC motor, or as a synchronous motor. The rotor of the motor can have at least one permanent magnet, whereas the stator has several electromagnets. The electromagnets are commutated via control electronics. Compared to other possible motor concepts, this enables the motor to start up from standstill in a defined manner, so that the amount of flushing liquid that can also be pumped off in the pump-off phases following the first pump-off phase can be maximized.

Furthermore, the dishwasher 1 comprises Figure 1 one in Figure 1 Sorption drying device 39, shown only schematically, which enables air to be circulated via a sorption column (not shown), to be introduced into the washing chamber 7 via an opening 40 and to be removed from the washing chamber 7 via a further opening 41 in order to return it via the sorption column respectively. Moisture in the air is deposited on the sorption column so that the air is dehumidified. During dehumidification, the air also heats up, so that the air introduced into the washing chamber 7 is dry and warm. The sorption drying device 39 is provided in particular to dry the items to be washed in a drying sequence by means of the dried and heated air during a drying cycle of a washing cycle. In order to remove the moisture accumulated on the sorption column again, the sorption column is provided with a heater, not shown, by means of which the sorption column is heated during a regeneration sequence in such a way that the moisture is detached from the sorption column again. The regeneration sequence can be carried out, in particular during a cleaning cycle of a wash cycle, in which case the waste heat from the regeneration sequence can then be used to heat a wash liquid of the cleaning cycle, which lowers the energy requirement of the heating device 24 assigned to the circulating pump 22.

Figure 2 shows a block diagram of the domestic dishwasher 1 of Figure 1 , where in particular their control and communication concept is shown. In the exemplary embodiment, a signal line 42 is provided which connects the operating device 3 to the control device 2 in such a way that operating commands from an operator can be transmitted from the operating device 3 to the control device 2 are. Furthermore, a signal line 43 is provided which connects the control device 2 to the output device 4, so that information provided by the control device 2 can be transmitted to the output device 4 and output there to the operator.

Furthermore, a control line 44 is provided which connects the control device 2 to the switchable inlet valve 18 such that the inlet valve 18 can be closed or opened by the control device 2. In this way, the filling of washing liquid S into the washing chamber 7 can be controlled by the control device 2. Another control line 45 connects the control device 2 to the circulating pump 22. As a result, the circulation of washing liquid S in the washing chamber 7 can also be set, in particular controlled or regulated, by the control device 2.

A signal line 46 is also provided, which connects the concentricity monitoring unit 27 to the control device 2. The signal line 46 makes it possible to transmit information generated by the concentricity monitoring unit 27 relating to the running properties of the circulating pump 22 to the control device 2. The control device 2 is designed such that it can take this information from the concentricity monitoring unit 27 into account when switching, in particular when controlling the closing and / or opening times, possibly also controlling or regulating, of the inlet valve 18. The concentricity monitoring device can in particular also be designed as a functional component of the control device.

Furthermore, a control line 47 is provided, which connects the control device 2 to the drain pump 31, so that the drain pump 31 can also be switched, in particular switched off and on, optionally also controlled or regulated, by the control device 2. Another signal line 48 connects the monitoring device 38 assigned to the drain pump 31 to the control device 2 in such a way that information generated by the monitoring device 38 can be taken into account by the control device 2 when carrying out wash cycles.

In the exemplary embodiment, a further control line 49 connects the control device 2 to the heating device 24 assigned to the circulating pump 22 such that the heating device 24 can be used as required by the control device 2 in the course of a wash cycle.

Via a further control line 50 which connects the control device 2 and the sorption drying device 39, it is also possible for the control device 2 to control and / or regulate the operation of the sorption drying device 39.

The addition of cleaning agent to a rinsing liquid can also be influenced by the control device 2 via a further control line 51, which connects the control device 2 and the metering device 28.

The addition of cleaning agent to a rinsing liquid can also be influenced by the control device 2 via a further control line 52, which connects the control device 2 and the metering device 29.

Figure 3 shows an exemplary wash cycle SG based on one of the wash programs of the dishwasher 1 according to the invention. It also shows Figure 3 an adapted or modified wash cycle SG ', which is carried out on the basis of the wash program manually adapted by an operating command and which has a special shine effect on the cleaned and dried wash ware, in particular through less carryover of dirt and / or detergent into the last wash liquid used in the wash cycle - Bath amount S causes. In the exemplary embodiment, this is the amount of bath in the final rinse cycle of the wash cycle. The normal or regular wash cycle SG (without drying to a shine) comprises several partial wash cycles, namely in the following chronological order: a pre-wash cycle VG for pre-cleaning the wash ware, a cleaning cycle RG for thorough cleaning of wash ware, an intermediate wash cycle ZG for removing soiled washing liquid S from the wash ware, a rinse cycle KG to avoid stains on the wash ware and a drying cycle TG for drying the wash ware. In principle, however, it would be possible to dispense with some of the named partial wash cycles, for example the pre-wash cycle VG. Additional partial wash cycles, for example a second intermediate wash cycle, could also be provided.

At the beginning of the pre-wash cycle VG, a filling sequence F ₁ for filling the washing chamber 7 with washing liquid S is carried out. In the exemplary embodiment the filling valve 18 is temporarily open. Likewise at the beginning of the pre-wash cycle VG, a circulation sequence U _{1 is} carried out, in which circulated washing liquid S is applied to the items to be washed. For this purpose, the circulation pump 31 is switched on at least temporarily during the circulation sequence U ₁ . After the circulation sequence U ₁ , a pump-out sequence A ₁ , described in more detail below, is carried out, during which at least a substantial part of the rinsing liquid S located in the rinsing chamber 7 and now soiled is discharged by means of the drain pump 31 to the sewer pipe AR, for example.

For the cleaning cycle RG that is now carried out, further rinsing liquid S is introduced into the rinsing chamber 7 by means of a further filling sequence F ₂ and is circulated in a further circulation sequence U ₂ . The cleaning effect of the cleaning cycle is increased in that the rinsing liquid S is heated in a heating phase H _2, for example by means of the heating device 24 and / or by means of the waste heat from a regeneration phase of the sorption drying device 39. For the same purpose, cleaning agent is added ZR in the cleaning cycle RG, for example via the metering device 28. In this way, the dirt adhering to the items to be washed can be almost completely removed in the cleaning cycle RG. In order to pump off the heavily soiled rinsing liquid S of the cleaning cycle RG, a pump-off sequence A _{2 is} carried out at the end of this.

The subsequent, single intermediate wash cycle ZG comprises a further filling sequence F ₃ for filling the washing chamber 7 with washing liquid S and a further circulation sequence U ₃ , which essentially serves to rinse off residues of the washing liquid S of the cleaning cycle RG from the items to be washed. At the end of the intermediate wash cycle ZG, a pump-out sequence A ₃ is now carried out.

In the later final rinse cycle KG, a further filling sequence F _{3 is used to} circulate washing liquid S in a circulation sequence U ₄ . The addition ZK of rinse aid, for example via the metering device 29, is provided in order to reduce the surface tension of the washing liquid S. As a result, the washing liquid S runs off the items to be washed better, which in a known manner serves to avoid stains on the items to be washed. The rinsing liquid of the final rinse cycle KG can take place by means of a further pump-out sequence A ₄ .

In the final drying cycle TG, the items to be washed are dried during a drying sequence T ₅ in the exemplary embodiment by means of warm, dry air from the sorption drying device 39. However, it is also possible to dry the items to be washed without the sorption drying device 39, in particular by so-called self-drying, in which the drying is based at least in part on the washing liquid S adhering to the items to be evaporated due to the heat stored in the items to be washed. In order to bring the items to be washed to the temperature required for this, the washing liquid S used there could be heated during the final rinse cycle KG by means of a heating phase not provided in the exemplary embodiment.

In the following, in particular, the following adaptation measures are carried out when selecting the adapted or modified wash cycle SG 'for "gloss drying" by entering at least one operating command on the operating device of the dishwasher by the control device:
One adaptation measure is that in selected partial wash cycles, in the exemplary embodiment the cleaning cycle RG, the intermediate wash cycle ZG and an additional intermediate wash cycle ZG _z , a modified pumping sequence A ' _z , A' ₃ and A ' _z , also described in more detail below, is carried out will.

At the end of the cleaning cycle RG, a first, modified pumping-out sequence A ' _{2 is} carried out, which is characterized in that a residual amount of rinsing liquid S that cannot be pumped off is reduced compared to the original pumping-out sequence A ₂ in the rinsing cycle SG (without gloss drying). In this way, the carryover of dirt and / or cleaning agent into the first intermediate wash cycle ZG carried out afterwards is reduced.

The disturbing residues of dirt and detergent can be removed particularly well in the first intermediate wash cycle ZG, since a particularly clean washing liquid is available in the intermediate wash cycle ZG due to the almost complete pumping out of the washing liquid S of the cleaning cycle RG. The washing liquid S of the first intermediate wash cycle ZG also absorbs only a little dirt and / or cleaning agent during the first intermediate wash cycle, so that the washing liquid S is significantly cleaner at the end of the intermediate wash cycle ZG than would be the case if an unmodified pump-out sequence had been carried out at the end of the cleaning cycle RG.

At the end of the first intermediate wash cycle ZG, a further, ie here a second modified pump-out sequence A ' _{3 is} carried out, which is also characterized in that a residual amount of washing liquid S that cannot be pumped off is reduced compared to the pump-out sequence A ₃ in the wash cycle SG (without gloss drying), whereby a carryover of dirt and / or cleaning agent into the additionally performed, second intermediate wash cycle ZG _{z is} reduced.

At the end of the additionally carried out, ie here the second intermediate wash cycle ZG _z, ie here the second intermediate wash cycle ZG _z , a further, ie here third, modified pumping sequence A ' _{z is} carried out which corresponds to the pumping sequence A' _{3 of} the first intermediate wash cycle ZG, ie in an analogous manner Way how this is done. This further reduces the entrainment of dirt and / or detergent into the final rinse cycle KG following the second intermediate wash cycle from the already relatively clean washing liquid S of the additional intermediate wash cycle ZG _z .

In contrast, the pump-out sequence A _{1 is} maintained at the end of the pre-wash VG. This can accelerate the execution of the washing cycle SG ′, although an increased spread of dirt into the subsequent cleaning cycle RG due to washing liquid S which has not been pumped out is possible. However, this does not cause any major problems, since at the end of the pre-wash cycle VG there is generally still a larger amount of dirt adhering to the wash ware, which is normally removed in the subsequent cleaning cycle RG and pollutes the washing liquid S used there, so that dirt can be carried over Rinsing liquid that has not been pumped out from the pre-wash cycle VG into the cleaning cycle RG is irrelevant.

The rinsing liquid of the final rinse cycle KG can easily be done by means of an unmodified pump-out sequence A ₄ , since, due to its low content of dirt and / or cleaning agent, a significant carryover of dirt and / or cleaning agent into a later wash cycle SG or a later adapted wash cycle SG 'in general not possible.

However, it is essential that by carrying out the - here in the exemplary embodiment preferably a total of three - modified pumping sequences A ' ₂ , A' ₃ and A _z for the cleaning cycle RG, for the first intermediate washing cycle ZG and the subsequent second intermediate washing cycle Z _z, the last washing liquid S of the wash cycle SG ', in the exemplary embodiment the washing liquid of the final rinse cycle KG, contains significantly less dirt and / or detergent, so that the formation of stains on the cleaned wash ware is further reduced after the end of the final drying process TG and a special gloss drying effect is achieved on the wash ware, especially with glass ware becomes.

During the entire duration of the modified pump-out sequences A ' ₂ , A' _{3 '} and A _z , the circulating pump 22 is preferably switched off in each case. This prevents washing liquid S from being distributed by the circulating pump 22 in the dishwasher 1 during the modified pumping-out sequences A ' ₂ , A' ₃ , and A _z , so that it can be pumped out better by means of the drain pump 31.

As already mentioned, a further adaptation measure consists in that at least one additional intermediate wash cycle ZG _{z is} carried out during the adapted wash cycle SG ′. This results in better rinsing of dirt and / or cleaning agents on the items to be washed, which counteracts the formation of stains on the items to be washed and thus leads to a higher gloss on the items to be washed.

In the exemplary embodiment, a further adjustment measure in the additional intermediate wash cycle ZG _z causes an addition ZK _z of rinse aid to a washing liquid S used there. This reduces the surface tension of the washing liquid S, so that at the end of the additional intermediate wash cycle ZG _z a larger proportion of the dirt - and / or detergent residues runs off and / or drips off the wash ware so that a larger proportion and the dirt and / or cleaning agent residues contained therein can be pumped out, which counteracts the formation of stains on the cleaned wash ware and thus leads to a higher gloss on the wash ware . Alternatively or additionally, an addition of rinse aid could also be provided for the first intermediate wash cycle ZG.

Furthermore, in the exemplary embodiment, a further adjustment measure in the intermediate wash cycle ZG causes a lengthening of a time span Z ₃ between a circulation sequence U ₃ for circulating the washing liquid and a pumping sequence A ' ₃ for pumping out the washing liquid and, in the case of the additional intermediate wash cycle ZG _z, an extension of a time span Z _z between a circulation sequence U _z for circulating the rinsing liquid and a pumping-out sequence A ' _z for pumping out the rinsing liquid. This additional draining waiting time allows a larger part of the washing liquid S adhering to the wash ware to drip off and / or run off, so that a larger part of the wash liquid S and the dirt and / or cleaning agent residues it contains can be pumped out, which counteracts the formation of stains on the cleaned wash ware and thus leads to a higher gloss on the dishes.

Another adaptation measure involves carrying out at least one additional heating phase H ₄ during the rinse cycle KG before rinsing agent ZK is added to a rinsing liquid S used there. Some rinsing agents tend to foam strongly in a relatively cold wash liquor at, for example, less than 35 ° C. Especially when several - here in the exemplary embodiment two - unheated intermediate wash cycles ZG, ZG _{z are carried out} , the critical temperature of the washing liquid S in the final rinse cycle KG can be significantly below the critical temperature. By providing an additional heating phase H ₄ before the addition of the rinse aid ZK, which is particularly advantageous in the case of the drying of the items to be washed by a particularly dry-warm air flow provided in the exemplary embodiment, excessive foam formation can be reliably prevented. As a result, the washing liquid of the final rinse cycle KG can wet the wash ware evenly, which counteracts the formation of stains on the cleaned wash ware and thus leads to a higher gloss on the wash ware.

In another advantageous embodiment, which provides, for example, self-drying to dry the items to be washed, an extension of an already provided heating phase could be provided, the extension at least 10%, preferably at least 20%, particularly preferably at least 30%, of the original duration of the heating phase could be.

A further, in particular optional additional, adjustment measure results in an extension of the duration of the drying cycle TG, the extension being at least 10%, preferably at least 20%, particularly preferably at least 30%, of the original or regular duration of the drying cycle TG (for the rinse cycle without gloss drying) amounts. By lengthening the duration of the drying cycle TG, an improvement in the drying effect is achieved, whereby in particular hollow vessels, such as drinking glasses, can also be dried better and the glossy effect is better accentuated. With the specified minimum values for the extension, there is already a significant improvement in the drying effect.

Overall, the adaptation measures shown bring about an improvement in the gloss result in the wash cycle SG '. The adaptation measures can in principle be provided individually or in any combination.

Figure 4 shows a schematic representation of a pump-out sequence A of the inventive dishwasher in FIG Figures 1 and 2 which the in Figure 3 shown pump-out sequences A ₁ , A ₂ , A ₃ and A ₄ for the rinse cycle SG (without gloss drying) corresponds. In this case, in an upper part of the diagram, the amount M of the amount of washing liquid S still present in the washing chamber 7 is shown in relation to the amount present at the beginning of the pumping sequence A over time. This amount M can also be referred to as the relative amount M in percent%.

The operating state Z31 of the drain pump 31 is shown in a lower part of the diagram. The operating state "1" means that the drain pump 31 is switched on, and the operating state "0" means that the drain pump 31 is switched off.

The pump-out sequence A includes a pump-down phase AP ₁ , during which the drain pump 31 is switched on continuously, ie continuously without interruption. The drain pump 31 can in particular be designed as an electric centrifugal pump, for example as a radial pump, as a half-radial pump or as an axial pump. The execution of the drain pump 31 as a centrifugal pump leads, improved or different than, for example, an execution as a piston pump, that the function of the drain pump is ensured even if the rinsing liquid to be pumped is heavily soiled.

If the drain pump 31, designed as a centrifugal pump, is now switched on at the beginning of the pump-off phase AP ₁ , the relative amount M of the washing liquid S in the dishwasher ₁ initially decreases essentially linearly over time while the speed of the drain pump 31 remains constant. If the amount of rinsing liquid S falls below a certain residual amount RMD at time T1, however, such an amount of air enters the circulating pump 31 that the pressure for delivering rinsing liquid S collapses and consequently no rinsing liquid S is delivered any more. This state can be determined by means of the monitoring device 38, for example on the basis of a monitoring of an electrical parameter of the drain pump 31, whereupon the pumping phase AP ₁ can be ended.

In this way, at the end of the pumping-out phase AP _1, a residual amount RMD of washing liquid S remains in the dishwasher at the end of the pumping-out phase AP _1, which cannot be pumped off during continuous operation of the drain pump 31. On the other hand, this ensures that during the first pumping-out phase AP _1, the amount AMD of washing liquid that can be pumped off in continuous operation of the circulating pump 31 S is actually pumped out.

Optionally, it can be provided that the first pumping-out phase AP ₁ is terminated if the monitoring device 38 has not determined that the flow of rinsing liquid has fallen below the minimum value after a predetermined period of time. In this way, it can be prevented that, in the event of a malfunction of the monitoring device 38, the first pump-out phase AP _{1 is} continued indefinitely.

Figure 5 FIG. 9 shows, in particular for a “gloss drying” wash program selected by the user, a schematic representation of a modified pump-out sequence A 'of the inventive dishwasher of FIG Figures 1 and 2 which the in Figure 3 shown pumping sequences A ' ₂ , A' ₃ and A ' _z corresponds. The modified pump-out sequence A 'comprises, in addition to the pump-out phase AP _{1 of} the original pump-out sequence A, two additional, chronologically subsequent pump-out phases AP ₂ and AP ₃ , during which the drain pump 31 is continuous is switched on. In addition, pauses P ₁ and P _{2 are} provided, during which the circulation pump 31 is continuously switched off. The first pumping phase AP ₁ is separated from its adjacent, temporally downstream, ie here the second pumping phase AP ₂ , by a pause or dead time period P ₁ , and this in turn is separated by a pause P ₂ from its adjacent, ie the following third pumping phase AP ₃ .

During the second pump-out phase AP ₂ , the relative amount M continues to decrease when the drain pump 31 is switched on. The effect that leads to a reduction in the relative amount M of flushing liquid S has not been conclusively clarified. However, it has been shown that after the first pumping phase AP1 when the circulation pump 31 starts up after the pause P _1, a pressure for pumping rinsing liquid S is built up at least for a short time, although the residual amount RMD that cannot be pumped off by means of the continuous operation of the drain pump 31 is still on Rinsing liquid S is below.

Surprisingly, this effect also occurs after the second pause P ₂ during the third pumping phase AP ₃ , so that the relative amount M continues to decrease. As a result, a residual amount RM 'of washing liquid S which cannot be pumped off with the modified pump-out sequence A' and which remains in the dishwasher 1 at the end of the modified pump-out sequence A 'can be significantly reduced compared to the non-pumpable residual amount RM of the pump-out sequence A. By carrying out at least three pumping phases AP ₁ , AP ₂ and AP ₃ per modified pumping sequence, the effect described can thus be used several times, so that the residual amount RM 'of rinsing liquid S not pumped off at the end of the modified pumping sequence A' can be particularly greatly reduced . To further reduce the residual amount RM 'of rinsing liquid S that cannot be pumped off with the modified pump-out sequence A', further pump-off phases, not shown, separated by pauses, could therefore be provided.

In particular, the pauses P ₁ and P _{2 can have} a duration of at least 1 second, preferably at least 2 seconds, particularly preferably at least 4 seconds, and / or at most 24 seconds, preferably at most 12 seconds, particularly preferably at most 6 seconds , exhibit. The specified minimum values for the duration of the pauses P ₁ and P ₂ are normal sufficient to ensure that the rinsing liquid S whirled up in the previous pump-out phase AP ₁ or AP ₂ in the drain pump 31 during the respective pause P ₁ or P ₂ reaches a rest position in which at least a brief pressure build-up when the drain pump 31 starts up is possible. The specified maximum values also ensure that the entire pumping sequence A does not take longer than necessary.

The pumping phases AP ₂ and AP ₃ following the first pumping phase AP ₁ preferably have a duration of at least 1 second, preferably of at least 2 seconds, particularly preferably of at least 4 seconds, and / or of at most 32 seconds, preferably of at most 16 seconds, particularly preferably of a maximum of 8 seconds. With the specified minimum values for the duration of the pumping phases AP ₂ and AP ₃ following the first pumping phase AP ₁ , the maximum amount of washing liquid S that can additionally be pumped off when the drain pump 31 starts up can be achieved in each of the subsequent pumping phases AP ₂ and AP ₃ . The specified maximum values also ensure that the entire modified pump-out sequence A 'does not last longer than necessary.

By reducing the residual amount RM 'of rinsing liquid S that cannot be pumped off by means of the modified pumping sequence A' compared to the unmodified, regular pumping sequence A, in particular a carryover of dirt and / or cleaning agents from the rinsing liquid S used before the modified pumping sequence A 'into a downstream modified pumping sequence A 'used rinsing liquid S are reduced. As a result, the dirt content and / or the detergent content in the last bath amount of washing liquid S, which is used last in the adapted wash cycle SG ', which is the wash bath amount for the rinse cycle KG, can be reduced, which causes stains on the cleaned items to be washed after Reduced at the end of the drying cycle. The cleaned and dried items are given a special sheen, especially when it comes to glass dishes.

In generalized terms, the following operating mode of the drain pump is thus in the case of the washing container being emptied as completely as possible, in particular its pump well or liquid collecting area, in particular in connection with the "gloss drying" program, but also separately from it, advantageous:
Considered over the total duration of the respective modified pumping-out sequence, which is carried out at the end of a partial wash cycle, for which the washing container, in particular its pump well or liquid collecting area, is required to be emptied as completely as possible, at least three pauses in between, i.e. interruption times of the lye pump run, are timed one after the other The following pumping phases of the drain pump are carried out. This is thus operated in particular "stuttering", ie preferably with at least three alternations of pump running and pause or interruption of the drain pump operation. Due to the at least two renewed pump starts after the first pumping phase, offset from one another by pauses, at least two surge of liquid can also be pushed out of the pump sump of the washing container into the drainage device, although the drain pump already drops the liquid level in the pump sump or the liquid collection area of the washing container below one during the first pumping out phase Has pumped out the amount of liquid threshold, from which it begins in particular to suck in air or from which the remaining amount of flushing liquid in the sump could no longer be pumped out due to continuous operation of the drain pump. This threshold value can possibly also be given by a residual amount of liquid that remains in the liquid collection area or sump of the washing compartment after a first pumping phase during which the drain pump works for a fixed predetermined period of time. Only in that the first pumping-out phase is aborted and the drain pump is reduced or completely switched off with regard to its speed compared to the operating speed in the first pumping-out phase for a predetermined pause time or dead time, and thus at least a second pumping-out phase by renewed speed ramp-up or a If the drain pump is switched on again, part of the residual amount of liquid remaining after the first pumping out phase in the liquid collecting area or in the pump sump of the washing container can be pumped out into the drainage device. If, after the end of the second pumping-out phase, another, second pause is waited for, during which the speed of the drain pump is reduced compared to the pumping-out speed or the drain pump is switched off, and the drain pump is then activated again in a third pumping-off phase, i.e. its speed to a specified pump-off speed booted or the drain pump is switched on, the drain pump can convey a further surge of liquid, ie a partial amount of the residual water amount remaining in the collection area or pump well of the washing container after the second pumping phase, into the drainage device.
In this way, the causes for the formation of stains on the items to be washed, such as the carryover of detergents and dirt into the rinse cycle and / or hardness builders (e.g. minerals, salts) in the water, can be reduced or avoided.

Instead of switching the drain pump on and off repeatedly, in particular at least three times, a speed change of the drain pump can alternatively be provided so that its speed is increased during the respective pumping phase and, on the other hand, decreased during the respective subsequent pause. The changing speeds are expediently selected in such a way that the behavior of the drain pump essentially corresponds to its off state at a low speed and essentially corresponds to its on state at a higher speed. A specified pumping speed is assigned to this.

In particular, it can be particularly advantageous if the drain pump pumps out at least 3 more times per modified pumping sequence, each time with a break from one another after the first pumping phase. In the respective pumping sequence A '(see Figure 5 ) after its third pumping phase AP3, after waiting for a pause or pumping interruption, a fourth pumping phase AP4, during which the drain pump runs again for pumping out. This fourth pumping phase AP4 is in the Figure 5 have been omitted for the sake of clarity. A particularly good emptying of the liquid collection area or pump well of the washing container is ensured by at least three pumping phases AP2-AP4 following the first pumping phase AP1.

In particular, it can be expedient if one or more of the above-mentioned modifications of the rinse cycle sequence for the special “gloss drying” program are carried out in a dishwasher which has a sorption drying system, preferably a so-called zeolite system. This is characterized in particular by a very energy-efficient and above all very effective drying process. This sorption drying system can optionally be used in combination with a conventional condensation-drying system in which the amount of liquid is brought to correspondingly high temperatures in the final rinse by means of a heating device, in particular a liquid heating device such as a flow heater and / or an air heating device, and the items are sprayed and thus heated becomes. The wash ware heated in this way, in particular only by means of the sorption drying device, then dries due to its own heat and through condensation of the air humidity in the wash container on the wash container walls, which are cooler than the warmed wash ware.

Optionally, the “gloss drying” program can of course also be implemented in a dishwasher that is only equipped with a conventional drying device, in particular a condensation drying device. Even then, the items to be washed can still be sufficiently dried to a gloss.

The modifications indicated above, as a single measure or in any combination, particularly preferably as a whole, ensure that the cleaned items to be washed, e.g. Crockery, especially glasses, cutlery, pots and pans, is free of stains after drying.

• die Verwendung von Klarspüler: Dann kann es ggf. zweckmäßig sein, das Programm "Glanztrocknen" nur dann seitens der Steuereinrichtung zu ermöglichen, wenn ein Klarspülermittel in die entsprechende Dosiereinrichtung in der Geschirrspülmaschine mit ausreichender Füllmenge eingefüllt ist. Andernfalls verriegelt oder deaktiviert die Steuereinrichtung zweckmäßigerweise die Bedieneinrichtung zur Auswahl des Programms "Glanztrocknen". Falls eigens eine Extra-Taste "Glanztrocknen" zur Auswahl bzw. Aktivierung/Deaktivierung des Programms "Glanztrocknen" vorgesehen ist, kann diese Funktionstaste bei Fehlen einer für den Spülgang ausreichenden Menge an Klarspüler durch die Steuereinrichtung verriegelt bzw. gesperrt werden. Alternativ oder zusätzlich kann dieses Fehlen von Klarspüler oder die Aufforderung zum Nachfüllen von Klarspülmittel dem Benutzer mittels der Informationsausgabe-, insbesondere Anzeigeeinrichtung, der Geschirrspülmaschine signalisiert werden.

zusätzliche Verdünnungsschritte um Reinigerreste/Schmutzreste auszuschwemmen, wie z.B. ein zweites Zwischenspülen, ein Abduschen, ein Zwischenschluck, und/oder mehr Wasser im Klarspülen, .usw..... Der jeweilige Zwischenschluck an Frischwasser kann dabei insbesondere nach dem Ende der jeweiligen Umwälzphase der Umwälzpumpe vor und/oder nach dem Ende der jeweiligen Abpumpsequenz oder insbesondere deren jeweiliger Abpumpphase in ein oder mehreren dem Trocknungsgang, insbesondere dem Klarspülgang, vorausgehenden Teilspülgängen durchgeführt werden. Dabei wird bei jedem Zwischenschluck sauberes Frischwasser über die von der Steuereinrichtung ansteuerbare Wassereinlaufeinrichtung in den Spülbehälter für den jeweiligen flüssigkeitsführenden Teilspülgang zusätzlich eingelassen. Dies führt zu einer Verdünnung von etwaig in der Spülflüssigkeit vorhandenen Reinigungsmittelanteilen und/oder Schmutzteilchen. Ggf. kann es zusätzlich oder unabhängig hiervon zweckmäßig sein, wenn ein Abduschvorgang zum Abduschen des Spülguts mittels Frischwassers, das durch die Wassereinlaufeinrichtung, insbesondere als Zwischenschluck, eingelassen wird, vor der jeweiligen Abpumpsequenz, vorzugsweise der jeweiligen Abpumpphase, durchgeführt wird. Dazu wird die Umwälzpumpe eingeschaltet und mittels der ein oder mehreren Sprüheinrichtungen über das zu reinigende Spülgut gesprüht. Mittels der derart verdünnten Spülbadmenge können Reinigungsmittelreste und/oder Schmutzteilchen vom Spülgut sowie Bauteilen wie z.B. Sprüheinrichtungen, Geschirrkörben, Halterungen, usw. im Spülbehälter und/oder von Innenwandungen des Spülbehälters abgewaschen werden und mittels der Laugenpumpe in der nächsten Abpumpphase aus dem Spülbehälter in die Abflusseinrichtung ausgeschwemmt werden. Somit wird ein unerwünschtes Verschleppen von Reinigungsmittelresten und/oder Schmutzteilchen vom Reinigungsgang in den Klarspülgang soweit reduziert und/oder im letzten flüssigkeitsführenden Spülgang, d.h. im Klarspülgang, eine Verdünnung der Spülbadmenge durch Zuschlag von Frischwasser derart durchgeführt, dass die Konzentration der Reinigungsmittelreste und/oder Schmutzteilchen in der Spülbadmenge beim Klarspülgang so niedrig wird, dass sich Reinigungsmittelreste und/oder Schmutzteilchen für das menschliche Auge nicht sichtbar, vernachlässigbar oder gar nicht beim abschließenden Trocknungsgang nach Verdunsten der anhaftenden Flüssigkeitströpfchen als Flecken am Spülgut absetzen können. Das fertig getrocknete Spülgut weist somit kaum oder gar keine Flecken auf. Es lässt sich auch verbessert Trocknen. Denn das Klarspülmittel kann während des Klarspülgangs verbessert zur Wirkung kommen, da Beeinträchtigungen der Wirkung seiner Inhaltsstoffe durch die erzielte Absenkung oder das Fehlen von Schmutzteilchen und/oder Reinigungsmittelreste weitgehend vermieden sind.

• ein spezieller Abpumpmodus mit "stotternd betriebener Laugenpumpe", mit dem Ziel, die Verschleppung von Reinigungsmittelresten und/oder Schmutzteilchen in den Klarspülgang zu reduzieren. Dieser "Stotterbetrieb" der Laugenpumpe ist obenstehend z.B. anhand der Figur 5 ausführlich erläutert.
• Eine zusätzliche Wartezeitdauer (wie z.B. Z₃, Z_z in Figur 3) nach dem Umwälzvorgang des jeweiligen Zwischenspülgangs, insbesondere nach dem jeweiligen Zwischenspülgang, damit vermehrt Spülflüssigkeit vom Spülgut und den Bauteilen im Spülbehälter abtropfen und dann mittels der Laugenpumpe im den jeweiligen Zwischenspülgang abschließenden, insbesondere modifizierten Abpumpvorgang, aus dem Spülbehälter abgepumpt werden kann.
• Reduzierung der Totwassermenge im Hydraulikkreislaufsystem der Geschirrspülmaschine. So kann beispielsweise die Wasserweiche und/oder alle Ventileinrichtungen für alle Zuleitungen zu den ein oder mehreren Sprüheinrichtungen in eine Stellung gebracht werden, in der Restwassermengen in den Pumpentopf ablaufen und von dort mittels der Laugenpumpe abgepumpt werden können. Bei Vorhandensein einer Wasserweiche wird deren Drehscheibe oder Verdrehzylinder zweckmäßigerweise derart von einer Anschlussstellung zur nächsten Anschlussstellung, in der oder denen die jeweilige Austrittsöffnung der Drehscheibe oder des Drehzylinders in Deckung mit der Eintrittsöffnung der Zuführleitung(en) zu den ein oder mehreren Sprüheinrichtungen kommt, verdreht, dass jeweils Totwasser bzw. Restwasser, das in den Leitungen steht, in den Pumpentopf oder in eine Sammeleinrichtung aufgrund seiner Schwerkraft zurücklaufen kann und von dort mittels der Laugenpumpe abgepumpt werden kann.
• Verlängerung der Trocknungszeitdauer (Trocknungsverlangsamung). Z.B. kann die Lüftergeschwindigkeit des Gebläses im Luftführungskanal des Sorptionstrocknungssystems gegenüber der Lüftergeschwindigkeit des Gebläses bei der Durchführung des Trocknungsgangs von Nicht- Glanztrocknungsprogrammen reduziert werden.

The gloss-drying effect on the wash ware can be supported or brought about in particular by taking the following measures:

• The use of rinse aid: It may then be useful to only enable the "Shine Drying" program on the part of the control device if a sufficient amount of rinse aid has been poured into the corresponding dosing device in the dishwasher. Otherwise, the control device expediently locks or deactivates the operating device for selecting the "gloss drying" program. If an extra "Shine Drying" button is provided for selecting or activating / deactivating the "Shine Drying" program, this function key can be locked or disabled by the control device if there is no sufficient amount of rinse aid for the wash cycle. Alternatively or additionally, this can be a lack of rinse aid or a request to refill rinse aid be signaled to the user by means of the information output device, in particular the display device, of the dishwasher.

additional dilution steps to flush out detergent residues / dirt residues, such as a second intermediate rinse, a shower, an intermediate sip, and / or more water in the final rinse, etc. ..... The respective intermediate sip of fresh water can be used especially after the end of the respective circulation phase Circulating pump can be carried out before and / or after the end of the respective pumping-out sequence or in particular its respective pumping-out phase in one or more of the partial wash cycles preceding the drying cycle, in particular the final rinse cycle. With each intermediate sip, clean fresh water is additionally admitted into the washing container for the respective liquid-carrying partial wash cycle via the water inlet device controllable by the control device. This leads to a dilution of any cleaning agent components and / or dirt particles present in the washing liquid. Possibly. In addition or independently of this, it may be useful if a showering process for showering the items to be washed using fresh water, which is let in through the water inlet device, in particular as an intermediate sip, is carried out before the respective pumping sequence, preferably the respective pumping phase. For this purpose, the circulating pump is switched on and sprayed over the items to be cleaned by means of the one or more spray devices. With the amount of washing bath diluted in this way, detergent residues and / or dirt particles from the items to be washed, as well as components such as spray devices, crockery baskets, brackets, etc. in the washing container and / or from the inner walls of the washing container can be washed off and, in the next pumping phase, from the washing container into the drainage system using the drain pump be washed out. In this way, unwanted carryover of detergent residues and / or dirt particles from the cleaning cycle into the rinse cycle is reduced and / or in the last liquid-carrying rinse cycle, i.e. in the final rinse cycle, the amount of washing bath is diluted by adding fresh water in such a way that the concentration of detergent residues and / or dirt particles The amount of detergent in the rinse cycle becomes so low that detergent residues and / or dirt particles are invisible to the human eye, negligibly or not at all in the final drying cycle after the adhering liquid droplets have evaporated as stains on the dishes. That done dried items to be washed have hardly any or no stains. It can also be used to improve drying. This is because the rinse aid can have an improved effect during the rinse cycle, since impairment of the effect of its ingredients due to the reduction achieved or the absence of dirt particles and / or detergent residues are largely avoided.

• a special pump-out mode with a "stuttering drain pump", with the aim of reducing the carryover of detergent residues and / or dirt particles into the rinse cycle. This "stuttering operation" of the drain pump is shown above, for example using the Figure 5 explained in detail.
• An additional waiting period (such as Z ₃ , Z _z in Figure 3 ) after the circulation process of the respective intermediate wash cycle, in particular after the respective intermediate wash cycle, so that more washing liquid can drip off from the items to be washed and the components in the washing container and then be pumped out of the washing container by means of the drain pump in the respective intermediate wash cycle, in particular a modified pumping process.
• Reduction of the amount of dead water in the hydraulic circuit system of the dishwasher. For example, the water switch and / or all valve devices for all supply lines to the one or more spray devices can be brought into a position in which residual amounts of water drain into the pump sump and can be pumped out from there by means of the drain pump. If a water switch is present, its turntable or rotating cylinder is expediently rotated from one connection position to the next connection position in which the respective outlet opening of the turntable or the rotating cylinder is in alignment with the inlet opening of the supply line (s) to the one or more spray devices, that in each case dead water or residual water that is in the lines can run back into the sump or into a collecting device due to its gravity and can be pumped out from there by means of the drain pump.
• Extension of the drying time (drying slowdown). For example, the fan speed of the fan in the air duct of the sorption drying system can be compared to the fan speed of the fan the implementation of the drying cycle of non-gloss drying programs.

With the help of these modified work steps and / or redesigns, which are used individually or in any combination in the wash cycle of the selected dishwashing program "Shine dry", a reduction in stains and / or an improvement in drying in a dishwasher, in particular a dishwasher with a zeolite system, can be ensured. Because the causes of the staining such as Carry-over of detergents and dirt into the rinse cycle and / or of hardness components (e.g. minerals, salts) in the water can thus be reduced or avoided.

• Die Abpumpvorgänge werden durch "Stotterbetrieb" der Laugenpumpe (wie z.B. im Ausführungsbeispiel zu Figur 5 erläutert) optimiert. Dadurch lässt sich die im Pumpentopf oder Flüssigkeitssammelbereich des Spülbehälters verbleibende Restwassermenge reduzieren und die Verschleppung von Reinigungsmittelresten und/oder Schmutzteilchen aus dem Reinigungsgang in den Klarspülgang reduzieren oder weitgehend vermeiden.
• Mindestens ein zweites Zwischenspülen wird durchgeführt, was ein besseres Abspülen von Reinigermittel- und/oder Schmutzresten sowie eine Verdünnung des im Spülbehälter verbleibenden Restwassers nach dem Ende des zweiten Zwischenspülgangs ermöglicht.
• Es wird zusätzlich Klarspüler im zweiten, allgemein ausgedrückt letzten Zwischenspülen verwendet. Dadurch kann die Spülflüssigkeit vom Spülgut und/oder von den Bauteilen im und/oder des Spülbehälters beim letzten Zwischenspülgang verbessert nach unten ablaufen.
• Die Spülbadmenge beim Klarspülgang des Glanztrocknungs-Spülprogramms kann gegenüber der Spülbadmenge in den anderen Spülprogrammen erhöht werden, wodurch die Klarspülflottenflüssigkeit weiter verdünnt wird.

The following modifications in the washing sequence in the selected dishwashing program "Shine drying" can be carried out individually and / or in any combination to reduce stains compared to the other washing programs, ie "non-sheen drying programs":

• The pumping out processes are caused by "stuttering" the drain pump (as in the exemplary embodiment too Figure 5 explained) optimized. This allows the residual amount of water remaining in the pump sump or liquid collecting area of the washing container to be reduced and the carryover of detergent residues and / or dirt particles from the cleaning cycle into the rinse cycle can be reduced or largely avoided.
• At least a second intermediate rinse is carried out, which enables cleaning agent and / or dirt residues to be rinsed off more effectively and the residual water remaining in the washing compartment to be diluted after the end of the second intermediate wash cycle.
• Rinse aid is also used in the second, generally expressed last, intermediate rinse. As a result, the washing liquid from the items to be washed and / or from the components in and / or the washing container can run off in an improved manner in the last intermediate wash cycle.
• The amount of rinse bath in the final rinse cycle of the gloss-drying rinse program can be increased compared to the amount of rinse bath in the other wash programs, as a result of which the rinse aid liquid is further diluted.

• Verlängerung der Trocknungszeit (insbesondere Lüfter-Laufzeit beim Sorptionstrocknungssystem) beispielsweise um > 10min
• Kurze Heizphase/Aufwärmen der Spülflottenflüssigkeit auf Mindesttemperatur vor der Zugabe des Klarspülers im Klarspülen, um Schaumbildung des mit Klarspüler versetzten Wassers zu vermeiden.

Furthermore, one or more of the following modifications to increase the drying performance can advantageously be carried out individually or in any combination with the selected dishwashing program "Shine Drying", ie the following parameters in particular can be changed to increase the drying performance compared to those of non-shine drying programs :

• Extension of the drying time (especially fan runtime for the sorption drying system), for example by> 10 minutes
• Short heating phase / warming up of the washing liquid to the minimum temperature before adding the rinse aid in the final rinse in order to avoid foaming of the water mixed with rinse aid.

• Verbessertes Abpumpen ("Stotterpumpe"): Hier werden dem Abpumpen mit "Leererkennung" (Erkennung beispielsweise über BLDC-Laugenpumpe) noch weitere, insbesondere mindestens zwei, bevorzugt mindestens drei Abpumpschritte hinzugefügt (jeweils kurze Pause, danach wieder kurze Abpumpphase). Vorzugsweise werden insgesamt pro Abpumpsequenz der Laugenpumpe bei deren "Stotterbetrieb" mindestens drei Abpumpphasen mit jeweils einer Wartezeit bzw. Pause zwischen je zwei aufeinanderfolgenden Abpumpphasen durchgeführt). Dadurch kann mehr Wasser aus dem Pumpentopf entfernt werden, was die Verschleppung von Reinigermittelresten und/oder Schmutzteilchen und/oder Härtebildnern sowie sonstigen Verunreinigungen reduziert.
• Zusätzliches Zwischenspülen, d.h. es sind mindestens zwei nacheinander folgende Zwischenspülgänge vorgesehen: Dadurch wird die noch im Gerät befindliche Spülflotte (z.B. am Geschirr und/oder an Bauteilen im Spülbehälter und/oder im Pumpentopf) verdünnt und abgespült, wodurch eine Verschleppung von Reinigermittelresten und/oder Schmutzteilchen und/oder Härtebildnern sowie sonstigen Verunreinigungen reduziert und die Spülflottenflüssigkeit stärker als nur mit einem einzigen Zwischenspülgang (, der bei den anderen Spülprogrammen ohne Glanztrocknen, Nicht- Glanztrocknen-Spülprogrammen vorgesehen ist,) verdünnt wird.
• Klarspüler im Zwischenspülen: Durch die zusätzliche Zugabe einer geringen Menge Klarspülers während des letzten Zwischenspülens wird die Oberflächenspannung des Wassers reduziert. Dadurch fließt das Wasser besser vom Geschirr ab. Die Verschleppung von Reinigermittelresten und/oder Schmutzteilchen und/oder Härtebildnern sowie sonstigen Verunreinigungen wird weiter reduziert.
• Erhöhung der Badmenge im Klarspülgang beim Glanztrocknungsprogramm gegenüber dem jeweiligen Klarspülgang bei den anderen Spülprogrammen ohne Glanztrocknen, Nicht- Glanztrocknen-Spülprogrammen. Dies sorgt für eine höhere Verdünnung der Spülbadmenge.
• Heizen im Klarspülen: Durch ein weiteres Zwischenspülen, insbesondere das zweite Zwischenspülen, kühlt die Geschirrspülmaschine weiter ab und die Badtemperatur der Klarspülflotte liegt niedriger als im jeweiligen Klarspülgang bei den anderen Spülprogrammen ohne Glanztrocknen. Bei geringen Spülbadtemperaturen neigen manche Klarspüler zum Schäumen. Deshalb wird hier beim Glanztrocknungsprogramm die Spülbadflüssigkeit ggf. auf eine Mindesttemperatur geheizt, ab der ein unerwünschtes Schäumen vermieden wird.
• Verlängerte Trocknungsphase: Durch die Verlängerung der Lüfterlaufzeit des Sorptionstrocknungssystems wird die Trocknung des Spülguts, insbesondere z.B. Geschirrs verbessert.

The measures listed above and / or the measures listed below can (possibly only partially) be integrated depending on the basic program structure:

• Improved pumping (“stuttering pump”): Here, pumping with “empty detection” (detection for example via BLDC drain pump) is added further, in particular at least two, preferably at least three pumping steps (each short pause, then again a short pumping phase). Preferably, a total of at least three pumping phases with a waiting time or pause between each two successive pumping phases are carried out per pumping sequence of the drain pump in its "stuttering operation". As a result, more water can be removed from the pump well, which reduces the carryover of cleaning agent residues and / or dirt particles and / or hardness builders and other impurities.
• Additional intermediate rinsing, ie at least two successive intermediate rinsing cycles are provided: As a result, the washing liquor still in the device (e.g. on the dishes and / or on components in the washing container and / or in the pump sump) is diluted and rinsed off, which means that it is carried over detergent residues and / or dirt particles and / or hardness builders as well as other impurities are reduced and the washing liquor is diluted more than just a single intermediate wash cycle (which is provided in the other wash programs without gloss drying, non-gloss drying wash programs).
• Rinse aid in the intermediate rinse: By adding a small amount of rinse aid during the last intermediate rinse, the surface tension of the water is reduced. This allows the water to flow off the dishes better. The carryover of cleaning agent residues and / or dirt particles and / or hardness builders and other impurities is further reduced.
• Increase in the amount of bath in the rinse cycle for the gloss drying program compared to the respective rinsing cycle for the other wash programs without gloss drying, non-gloss drying wash programs. This ensures a higher dilution of the amount of rinsing bath.
• Heating in the final rinse: With a further intermediate rinse, in particular the second intermediate rinse, the dishwasher cools down further and the bath temperature of the final rinse solution is lower than in the respective final rinse cycle in the other wash programs without drying to a shine. At low wash bath temperatures, some rinse aids tend to foam. This is why the rinsing bath liquid is heated to a minimum temperature in the gloss drying program, above which undesired foaming is avoided.
• Extended drying phase: By extending the fan running time of the sorption drying system, the drying of the items to be washed, especially dishes, for example, is improved.

• Beim herkömmlichen Abpumpen (Abpumpen auf Leererkennung) bleiben beispielsweise ca. 160-180ml Spülflotte im Pumpentopf zurück.
• Durch das modifizierte Abpumpen können diese Spülflottenflüssigkeits- Restmengen beispielsweise auf ca. 60-100ml reduziert werden.
• Beim modifizierten Abpumpen werden an das serienmäßige Abpumpen noch weitere Pumpschritte (mind. 2 Schritte, bevorzugt mind. 3 Schritte) angehängt:

In particular, the way in which the washing bath liquid is pumped off after the respective liquid-carrying partial wash cycle, which precedes the final rinse cycle of the “gloss drying program”, can advantageously be changed in the manner of a “stuttering pump-out”, in addition or independently of this; this is particularly true of the embodiment of Figure 5 explained:

• With conventional pumping (pumping on empty detection), for example, approx. 160-180ml of washing solution remains in the pump sump.
• By means of the modified pumping action, these residual quantities of washing liquid can be reduced to approx. 60-100ml, for example.
• With modified pumping, additional pumping steps (at least 2 steps, preferably at least 3 steps) are added to the standard pumping:

• Abpumpen auf Leererkennung
• Pause (5 sec)
• Abpumpen (7 sec)
• Pause (5 sec)
• Abpumpen (7 sec)
• Pause (5 sec)
• Abpumpen (7 sec)

As an example, the modified pumping (schematic) can in particular be carried out as follows:

• Pump down on empty detection
• Pause (5 sec)
• Pump out (7 sec)
• Pause (5 sec)
• Pump out (7 sec)
• Pause (5 sec)
• Pump out (7 sec)

• Reinigen (z.B. mit 3,9 I Wasser)
• Abpumpen
• Zwischenspülen (z.B. mit 2,9 I Wasser)
• Abpumpen
• Klarspülen (z.B. mit 2,5 I Wasser)
• Trocknungsphase

As an example, a program sequence (schematic) without "Shine drying" can look like this:

• Cleaning (e.g. with 3.9 l water)
• Pumping out
• Intermediate rinsing (e.g. with 2.9 l water)
• Pumping out
• Rinsing (e.g. with 2.5 l water)
• Drying phase

• Reinigen (z.B. mit 3,9 I Wasser)
• modifiziertes Abpumpen
• ersten Zwischenspülen (z.B. mit 2,9 I Wasser)
• modifiziertes Abpumpen
• zusätzliches, d.h. zweites Zwischenspülen (z.B. mit 3 I Wasser und Klarspülerzugabe)
• modifiziertes Abpumpen
• Klarspülen (z.B. mit 3,0 I Wasser, also erhöhter Füllmenge und zusätzlichem Heizen vor Zugabe des Klarspülers auf ca. 35-38°C)
• verlängerte Trocknungsphase

In contrast, the program sequence (schematic) with "Shine drying" (improved drying and less staining) can be carried out as follows:

• Cleaning (e.g. with 3.9 l water)
• modified pumping
• first intermediate rinse (e.g. with 2.9 l water)
• modified pumping
• additional, i.e. second intermediate rinse (e.g. with 3 l water and added rinse aid)
• modified pumping
• Final rinse (e.g. with 3.0 l water, i.e. increased filling quantity and additional heating before adding the rinse aid to approx. 35-38 ° C)
• extended drying phase

In order to achieve a good drying result with few stains, the separate use of rinse aid (i.e. the addition of rinse aid via the dishwasher's system) is advisable and recommended for the "Shine dry" function.

Should a customer nevertheless not fill in rinse aid or the amount of rinse aid in the dishwasher's dosing system is insufficient and instead only use a multifunctional stick such as a so-called "3in1" or "5in1" tab, the following remedial measures can be taken if necessary: which modify the gloss drying program, in particular to ensure that by selecting "gloss dry" the drying result that is normally achieved without the additional function "gloss drying" is not noticeably impaired: the additional intermediate rinse for the first intermediate rinse is retained. However, the bath quantities in this additional intermediate rinse and in the subsequent final rinse are reduced to, for example, 2.5L compared to the rinse bath volumes in the second intermediate rinse and final rinse of the gloss drying program, in order to carry over surfactants from the multifunctional rod to the final rinse. The pumping takes place again in the "conventional" mode. It may be possible to dispense with the additional rinse aid metering in the last, in particular the second, intermediate rinse. Possibly. can be heated to higher temperatures in the final rinse, in order to bring more rinse aid from the tab into the final rinse and to improve drying. The extended drying time can be retained.

List of reference symbols

1

dishwasher

2

Control device

3

Control device

4th

Output device

5

Rinsing container

6th

door

7th

Washing chamber

8th

casing

9

upper basket

10

lower basket

11

Pull-out rail

12

Pull-out rail

13

Water inlet device

14th

Connector

15th

Connection hose

16

connection piece fixed to the housing

17th

Supply means, supply line

18th

Inlet valve

19th

Liquid inlet

20th

Bottom of the rinsing container

21st

Collection device, collection pot

22nd

Circulation pump

23

Inlet of the circulation pump

24

Heating device

25th

upper spray arm

26th

lower spray arm

27

Circulation monitoring unit for the circulation pump

28

Dosing device for detergents

29

Dosing device for rinse aid

30th

Drainage facility

31

Drain pump

32

Inlet of the drain pump

33

Non-return valves

34

Connecting line

35

housing fixed connection

36

Sewer hose

37

Connector

38

Monitoring device for flushing liquid flow

39

Sorption drying device

40

Opening for air to enter the rinsing container

41

Opening for air to exit the rinsing container

42

Signal line

43

Signal line

44

Control line

45

Control line

46

Signal line

47

Control line

48

Signal line

49

Control line

50

Control line

51

Control line

52

Control line

WH

Water supply facility, faucet

ZW

Inlet water

S.

Rinsing liquid

AR

Sewage disposal facility, sewer pipe

AW

sewage

SG

Rinse cycle

VG

Pre-wash

RG

Intermediate rinse

ZG

Intermediate rinse

KG

Rinse cycle

TG

Drying cycle

F.

Filling sequence

U

Circulation sequence

A.

Pumping sequence

H

Heating phase

Z

Time span between the circulation sequence and the pump-out sequence

T

Drying sequence

ZR

Adding detergent

ZK

Adding rinse aid

AP

Pumping phase

P

Break

Z31

Operating condition of the drain pump

M.

relative amount of washing liquid in the washing chamber

AMD

amount of flushing liquid that can be pumped off in continuous operation of the drain pump

RMD

Residual amount of flushing liquid that cannot be pumped off in continuous operation

RM

Residual amount of flushing liquid at the end of the pumping sequence

Claims (9)

1. Dishwasher (1), especially a household dishwasher, with a control device (2), in which at least one wash program for carrying out a wash cycle (SG, SG') comprising a number of part wash cycles for cleaning and/or drying items to be washed is stored, and with an operating device (3) for entering operating commands for the control device (2), wherein at least one operating command for carrying out one or more adaptation measures to at least one of the wash programs is able to be input at the operating device (3), by means of which the avoidance of spots on the items to be washed and/or the drying result on the washed items is improved when the wash cycle (SG') based on the adapted wash program is carried out, characterised in that

   • one of the adaptation measures during the wash cycle (SG') causes at least one additional part wash cycle provided as an intermediate rinse cycle (ZGz) to be carried out and/or

   • one of the adaptation measures brings about an increase in an amount of washing fluid (S) used in a part wash cycle provided as a final rinse cycle (KG), wherein the increase amounts to at least 20%, preferably at least 30%, especially preferably at least 40%, of the original amount of the respective washing fluid (S), and/or

   • one of the adaptation measures, in at least one part wash cycle provided as an intermediate rinse cycle (ZG, ZGz), brings about an addition (ZK_z) of rinse aid to a washing fluid (S) used there and/or

   • one of the adaptation measures brings about a lengthening of a heating phase of a washing fluid (S), wherein the lengthening amounts to at least 10%, preferably at least 20%, especially preferably at least 30%, of the original duration of the heating phase, and/or an execution of at least one additional heating phase (Hz) during a part wash cycle provided as a final rinse cycle (KG) before the addition (ZK) of rinse aid to a washing fluid (S) used there and/or

   • one of the adaptation measures brings about a modification of at least one pump-off sequence (A, A₁, A₂, A₃, A₄) for pumping off a washing fluid of a part wash cycle by means of a drain pump (31) from the dishwasher (1), wherein in the modified pump-off sequence (A', A'₂, A'₃, A'_z) a non-pumped-off residual amount (RM') of washing fluid (S) is reduced and/or

   • one of the adaptation measures, in at least one part wash cycle provided as an intermediate rinse cycle (ZG, ZGz), brings about a lengthening of a period of time (Z₃, Z_z) between a circulating sequence (U₃, U_Z) for circulating the washing fluid and a pump-off sequence (A'₃, A'_z) for pumping off the washing fluid (S).
2. Dishwasher according to the preceding claim, characterised in that the operating command is able to be entered for carrying out adaptation measures via an operating element provided exclusively for the purpose.
3. Dishwasher according to one of the preceding claims, characterised in that one of the adaptation measures brings about a lengthening of a duration of a part wash cycle provided as a drying cycle (TG), wherein the lengthening amounts to at least 10%, preferably at least 20%, especially preferably at least 30%, of the original duration of the drying cycle (TG).
4. Dishwasher according to one of the preceding claims, characterised in that one of the adaptation measures brings about a modification of at least one pump-off sequence (A, A₁, A₂, A₃, A₄) for pumping off a washing fluid of a part wash cycle by means of a drain pump (31) from the dishwasher (1), wherein in the modified pump-off sequence (A', A'₂, A'₃, A'_z) a non-pumped-off residual amount (RM') of washing fluid (S) is reduced and wherein the pump-off sequence (A, A₁, A₂, A₃, A₄) comprises at least one pump-off phase (AP₁) during which the drain pump (31) is switched on or increases its speed, wherein the modified pump-off sequence (A', A'₂, A'₃, A'_z) comprises at least one additional pump-off phase (AP₂, AP₃), during which the drain pump (31) is switched on or speeds up, wherein the additional pump-off phase (AP₂, AP₃) is separated by a pause (P₁, P₂), during which the drain pump (31) is switched off or reduces its speed, from the respective preceding pump-off phase (AP₁, AP₂).
5. Dishwasher according to claim 4, characterised in that the modified pump-off sequence (A', A'₂, A'₃, A'_z) comprises a total of at least three pump-off phases (AP₁, AP₂, AP₃).
6. Dishwasher according to one of claims 4 or 5, characterised in that in the pump-off sequence (A, A₁, A₂, A₃, A₄) and/or the modified pump-off sequence (A', A'₂, A'₃, A'_z) the first pump-off phase (AP₁) of the pump-off phases (AP₁, AP₂, AP₃) is provided for pumping off an amount (AMD) of washing fluid able to be pumped off in continuous operation of the drain pump.
7. Dishwasher according to one of claims 4 to 6, characterised in that a monitoring device (38) is provided for monitoring a flow of washing fluid conveyed by the drain pump (31), wherein in the pump-off sequence (A, A₁, A₂, A₃, A₄) and/or the modified pump-off sequence (A', A'₂, A'₃, A'_z) there is provision for aborting the first pump-off phase (AP₁) of the pump-off phases (AP₁, AP₂, AP₃) if an undershoot of a minimum value for the flow of washing fluid is detected by the monitoring device (38).
8. Dishwasher according to one of the preceding claims, characterised in that at least one adaptation measure provided on entry of the operating command for carrying out adaptation measures is not carried out if a dispensing device (29) for adding rinse aid to the washing fluid (S) is deactivated or when the fill level of rinse aid in the dispensing device (29) for adding rinse aid drops below a minimum level.
9. Method for operating a dishwasher, especially a household dishwasher, with a control device (2) in which at least one wash program for carrying out a wash cycle (SG, SG') comprising a number of part wash cycles for cleaning and/or drying items to be washed is stored, and with an operating device (3) for entering operating commands for the control device (2), especially according to one of the preceding claims, wherein one or more adaptation measures are carried out on at least one of the wash programs such that the avoidance of spots on the items to be washed and/or the drying result on the washed items is improved when the wash cycle (SG') based on the adapted wash program is carried out, if an operating command intended for this purpose for carrying out adaptation measures is entered at the operating device (3), characterised in that

   • one of the adaptation measures during the wash cycle (SG') causes at least one additional part wash cycle provided as an intermediate rinse cycle (ZGz) to be carried out and/or

   • one of the adaptation measures brings about an increase in an amount of washing fluid (S) used in a part wash cycle provided as a final rinse cycle (KG), wherein the increase amounts to at least 20%, preferably at least 30%, especially preferably at least 40%, of the original amount of the respective washing fluid (S), and/or

   • one of the adaptation measures, in at least one part wash cycle provided as an intermediate rinse cycle (ZG, ZGz), brings about an addition (ZK_z) of rinse aid to a washing fluid (S) used there and/or

   • one of the adaptation measures brings about a lengthening of a heating phase of a washing fluid (S), wherein the lengthening amounts to at least 10%, preferably at least 20%, especially preferably at least 30%, of the original duration of the heating phase, and/or an execution of at least one additional heating phase (Hz) during a part wash cycle provided as a final rinse cycle (KG) before the addition (ZK) of rinse aid to a washing fluid (S) used there and/or

   • one of the adaptation measures brings about a modification of at least one pump-off sequence (A, A₁, A₂, A₃, A₄) for pumping off a washing fluid of a part wash cycle by means of a drain pump (31) from the dishwasher (1), wherein in the modified pump-off sequence (A', A'₂, A'₃, A'_z) a non-pumped-off residual amount (RM') of washing fluid (S) is reduced and/or

   • one of the adaptation measures, in at least one part wash cycle provided as an intermediate rinse cycle (ZG, ZGz), brings about a lengthening of a period of time (Z₃, Z_z) between a circulating sequence (U₃, U_Z) for circulating the washing fluid and a pump-off sequence (A'₃, A'_z) for pumping off the washing fluid (S).

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