EP3473155B1 - Dishwasher - Google Patents

Description

The invention relates to a dishwasher, in particular a household dishwasher, with a washing compartment that provides a washing space for accommodating items to be washed, a collection pot into which the washing compartment flows, a circulation pump and a drain pump, each of which is fluidically connected to the collection pot, the circulation pump being fluidically controlled Interposition of a pipe socket providing a suction mouth is connected to the collection pot, and with a fresh water inlet. Furthermore, the invention relates to a method for introducing fresh water into a dishwasher, in which the fresh water is supplied to the dishwasher from a fresh water discharge point.

Dishwashers of the type mentioned at the outset are well known per se from the prior art, which is why separate printed evidence is not required at this point.

Previously known dishwashers have a washing compartment that provides a washing area. This is accessible to the user via a loading opening which can be closed in a fluid-tight manner by means of a pivotably mounted washing compartment door. When used as intended, the washing container is used to hold items to be cleaned, which can be crockery, cutlery and/or the like, for example.

In order to apply washing liquid, the so-called washing liquor, to the items to be washed to be cleaned, the dishwasher has a spray device in the interior of the washing compartment. This spray device typically provides rotatably mounted spray arms, with two or three such spray arms being provided as a rule. In the case of intended use, the items to be cleaned are subjected to washing liquor by means of rotating spray arms.

The delivered by the sprayer in the operating case washing liquor hits the items to be cleaned and then collects in a collection pot, in which the rinsing tank opens. The collection pot is connected to a circulation pump on the one hand and to a drain pump on the other hand. The circulating pump, which in the intended use case circulates the rinsing liquid fed into the dishwasher, is used to charge the spray device with rinsing liquor. At the end of a washing program, the washing liquid is pumped out using the drain pump and discarded.

At the start of a washing program, fresh water is supplied to the dishwasher from a fresh water delivery point. For this purpose, the collection pot of the dishwasher has a fresh water inlet which is fluidically connected to the fresh water discharge point, for example by means of a hose. As soon as the collection pot is filled with enough fresh water for proper operation of the circulating pump, the circulating pump is put into operation, as a result of which the spray arms of the spray device are charged with washing liquor.

the WO 2009/068391 A1 discloses a dishwasher with a water reservoir that can be supplied with fresh water from a domestic supply network. This is connected to the circulation circuit via an inlet line. In this case, the inlet line opens into the circulating intake line.

Due to the design, even after washing liquor has been pumped out as intended by means of the drain pump at the end of a washing program, a residue of washing liquor that cannot be pumped away remains in the pump housings of the circulating pump and drain pump, in the collecting tank and in the lines for the formation of technical connections between the collecting tank and the circulating pump on the one hand and the collection pot and the drain pump on the other hand. If an intended washing program is now started by introducing fresh water, the fresh water is mixed with the residual washing liquor still present in the dishwasher. This leads to an unintentional entrainment of caustic and/or chlorides in the newly started dishwashing program. Disadvantageously, this can result in signs of corrosion, specifically both on components on the dishwashing side, such as the heating device, the pump housings, the supply lines and/or the like, and on the dishes to be cleaned.

In order to counteract such alkali and / or chloride carryover, it is from the EP 2 759 244 B1 known, following a completed according to regulations Washing items to be cleaned Introduce fresh water into the dishwasher for flushing, in particular the circulation pump and the collection pot. The beats EP 2 759 244 B1 proposes introducing fresh water directly into the circulating pump, with the circulating pump switched off, i.e. without a pump. The fresh water fed into the circulating pump flows through the circulating pump and from there it goes directly to the collecting tank via the corresponding connecting lines. From here, a discharge can take place by switching on the drain pump. As a result of the introduction of fresh water, the residual washing liquor in the dishwasher is not only merely mixed with the fresh water, but the remaining washing liquor is largely expelled by displacement. Almost complete disposal of the residual wash liquor can thus be achieved with comparatively little fresh water, so that as far as possible no alkali and/or chloride residues are carried over into a subsequent wash program.

Although after the EP 2 759 244 B1 previously known design has proven itself in everyday practical use, there is a need for improvement, in particular with regard to a simplified structure of the dishwasher. Because according to the previously known construction, not only the collection pot but also the circulating pump is connected to the fresh water discharge point, which necessitates additional lines and valves. This proves to be disadvantageous in production and assembly, in particular with regard to the associated costs.

It is therefore the object of the invention to further develop a generic dishwasher to the effect that flushing of the suds and/or chloride line is made possible with a reduced structure on the machine side.

To solve this problem, a dishwasher with the features of claim 1 is proposed with the invention.

In terms of the method, it is also proposed that the fresh water be fed to a circulating pump of the dishwasher on the suction mouth side and pumped from there by means of the circulating pump into a collection pot that is fluidically connected to the circulating pump, with a drain pump that is fluidically connected to the collection pot being operated at least temporarily at the same time as the circulating pump and located in the collection pot accumulating mixed water Fresh and residual water is pumped out.

In a departure from the prior art, the fresh water inlet is formed on the suction side of the circulating pump. On the process side, therefore, the lye and/or chloride line is flushed through using the circulating pump, that is to say, in contrast to the prior art, not without a pump.

The suction-side connection to the circulating pump is formed in the area of the suction mouth of the circulating pump, that is to say on the suction-mouth side. According to the invention, a fresh water inlet in the non-pressurized area of the collection pot, which is usual in dishwashers of this type, is dispensed with. The "suction mouth-side" design of the fresh water inlet within the meaning of the invention means that in the intended operating case, a fresh water inlet takes place completely or almost completely directly into the circulating pump, i.e. without the incoming fresh water or at least the major part of the incoming fresh water having previously flowed into other areas of the collecting pot reached. A design on the suction mouth side in this sense is present in particular when the fresh water inlet is designed within the fluidic connection between the collection pot and the circulating pump.

The configuration according to the invention allows a complete flushing of the caustic and/or chloride section, ie the circulating pump, the collecting pot and the line path leading from the circulating pump via the collecting pot to the drain pump, so that residual liquids located there can be expelled as far as possible, so that no undesirable caustic and/or carry over of chloride into a subsequent washing program. In a departure from the prior art, the circulating pump is charged with fresh water via the suction side, with flushing not taking place without a pump, but rather during pump operation.

The configuration according to the invention is compared to the known construction according to the EP 2 759 244 B1 particularly advantageous with regard to two aspects. On the one hand, the construction effort on the machine side is reduced. Only one fresh water inlet is required, which according to the invention is designed on the suction mouth side of the circulating pump. About this fresh water inlet is a feed with fresh water both in Rinsing program case and for the purpose of flushing instead of the method according to the invention. In this respect, no additional line paths including corresponding blocking and/or actuating elements are required. An overall simplified structure of the dishwasher is thus achieved, which simplifies and reduces production.

On the other hand, the result of the flushing achieved with the implementation of the method according to the invention is more effective. Because the pump-operated flushing provided according to the invention requires that the fresh water introduced into the circulation pump on the suction mouth side is first pumped via one of the spray arms of the spray device into the washing chamber, from where it flows into the washing container, from which it can then be pumped out. According to the implementation of the method according to the invention, the access routes to the spray device, parts of the washing container and in particular the area where the washing container opens into the collection pot are also recorded, which results in an improved cleaning result overall. In this context, there is also the fact that the collection pot, in contrast to the configuration according to the prior art, is not charged with fresh water via a lateral access, but from above with the interposition of the washing container. This advantageously leads to the fact that, due to the density differences between fresh water and residual water, there is an increased displacement of residual water by the fresh water introduced compared to the prior art. This also contributes overall to an improved process result.

At the beginning of the implementation of the method according to the invention, the circulating pump is supplied with fresh water from the fresh water discharge point on the suction mouth side. The circulating pump is switched on at the same time as the fresh water supply or with a time delay. It is preferred to switch on the circulating pump before the fresh water is introduced, in order to prevent parts of the fresh water introduced from being able to flow into the collection pot when the circulating pump is switched off.

The introduced fresh water is sucked in when the circulating pump is switched on and brought to the pressure side of the circulating pump, where it reaches the corresponding supply lines to the spray device. In order to prevent items to be washed in the washing compartment from being wetted with fresh water, it is preferable to feed the lower spray arm of the spray device with fresh water.

The fresh water fed to the spray device, in particular to the lower spray arm of the spray device, collects on the bottom side of the washing compartment and flows into the collection pot which is fluidically connected to the washing compartment. This is where the residual water that may still be in the collection pot is displaced or the fresh water is mixed with the residual water. Preferably before or at the latest when the circulating pump is switched on, the drain pump is also switched on, so that when or at the latest when the fresh water conveyed by the circulating pump is introduced into the collecting pot, the residual water contaminated with alkali and/or chloride can be pumped out.

For the fluidic connection of the circulating pump to the collection pot, a pipe socket is typically provided on the collection pot side. This pipe socket provides the suction port for the circulation pump. According to a particular feature of the invention, it is now provided that the pipe socket connected to the fluidic connection between the circulating pump and the collection pot has the fresh water inlet. In this case, the fresh water inlet can be designed as a connecting piece formed on the pipe socket, onto which the line for supplying fresh water is plugged. This type of constructive design proves to be particularly simple in terms of production, since the collection pot together with the pipe socket and the connection socket arranged thereon can be designed as a one-piece injection molded part.

According to a further feature of the invention, a bypass line which opens into the collection pot and leads to the pipe socket is provided. This bypass line serves to equalize the pressure during the intended execution of a washing program.

At the beginning of a washing program, fresh water is supplied to the dishwasher in a manner known per se via the fresh water inlet. As soon as the amount of fresh water required for proper pump operation has been introduced into the dishwasher, the circulation pump is started up, as a result of which fresh water circulation within the dishwasher is as intended. During such a circulating operation, a negative pressure is formed on the suction side of the circulating pump. Since, according to the invention, the fresh water inlet is formed on the suction mouth side of the circulating pump, such a negative pressure formation means that the circulating pump draws air out of the fresh water inlet line. This disrupts the proper operation of the circulating pump and should therefore be avoided. According to the invention, therefore, a bypass line is provided which is fluidically connected to the collection pot. In the event of negative pressure, air is thus prevented from being sucked in from the fresh water supply line.

In this context, according to a further feature of the invention, a fresh water line is provided for connection to a fresh water discharge point, which is connected to a first supply line and a second supply line on the machine side, the first supply line opening into the fresh water inlet and the second supply line forming the bypass line. According to this further development of the invention, a fresh water line is provided that divides into two supply lines, one supply line being connected to the circulation pump on the suction mouth side and the other supply line to the collection pot. When used as intended, the circulating pump is fed with fresh water via the first feed line. When carrying out an intended flushing program, a pressure equalization can be achieved during a circulation operation of the circulation pump via the bypass line.

According to a further feature of the invention, the two supply lines are connected to the fresh water line with the fluidic interposition of a Y-piece or branch piece. According to this embodiment, the second supply line, ie the bypass line, forms a type of line bend in the manner of a siphon, with which the desired functionality of the bypass line is reliably ensured.

According to an alternative embodiment of the invention, it is provided that the fresh water inlet opens into a chamber provided by the collection pot, which is formed on the fresh water inlet side of the pipe socket. According to this embodiment, the pipe socket fluidically connecting the collecting pot to the circulating pump is not equipped with a connecting piece for connecting the fresh water line, but rather a chamber provided by the collecting pot is provided, which opens fluidically into the pipe socket. In the case of intended use, according to this embodiment, the pipe socket is fed with fresh water with the interposition of the chamber on the collecting pot side. As a result of this embodiment too, a suction mouth side of the circulating pump is provided Given fresh water inlet, which ensures that a fresh water inlet takes place directly in the circulation pump, without the incoming fresh water flowing into other areas of the collection pot. The alternative chamber configuration has the advantage that no additional bypass line is required to reduce negative pressure when the circulating pump is operating as intended. This is because the chamber that opens into the pipe socket is designed to be at least partially open on the collection pot side, so that pressure equalization can take place in normal operation.

In terms of the method, it is also proposed that the fresh water fed to the circulating pump is fed to the collection pot with a spray arm of the dishwasher being interposed in terms of flow technology. This spray arm is preferably the lower spray arm, so that unintentional wetting of items to be washed in the washing compartment with fresh water is avoided. The fluidic interconnection of the spray arm provided according to the implementation of the method according to the invention has the advantage that, in contrast to the prior art, lye and/or chloride residues adhering to the area in which the washing container opens into the collection pot can be removed.

In terms of the method, it is also provided that the circulating pump is operated at an idle speed. However, it is preferred to select the speed of the circulating pump as low as possible, for example by operating the circulating pump counterclockwise and/or by selecting the no-load speed as the speed. Operating the circulating pump at the lowest possible speed has the advantage that the fresh water supplied to the circulating pump is pumped into the washing compartment with as little pressure as possible, which minimizes the risk of the items to be washed in the washing compartment being wetted with fresh water.

With the device according to the invention and the method according to the invention, an improved recirculation of undesired chloride and/or lye residues is brought about while at the same time reducing the outlay on the device side.

Fig. 1

in schematischer Ansicht eine erfindungsgemäße Geschirrspülmaschine;

Fig. 2

in schematischer Prinzipdarstellung eine erfindungsgemäße Geschirrspülmaschine;

Fig. 3

in perspektivischer Seitenansicht ein Sammeltopf der erfindungsgemäßen Geschirrspülmaschine gemäß einer ersten Ausführungsform;

Fig. 4

in schematischer Seitenansicht aus einer anderen Perspektive den Sammeltopf nach Fig. 3;

Fig. 5

in perspektivischer Draufsicht von oben ein Sammeltopf der erfindungsgemäßen Geschirrspülmaschine gemäß einer alternativen Ausführungsform;

Fig. 6

in perspektivischer Seitenansicht den Sammeltopf nach Fig. 5 und

Fig. 7

in einer Draufsicht von oben den Sammeltopf nach den Figuren 5 und 6.

Further features and advantages of the invention result from the following description based on the figures. show it

1

a schematic view of a dishwasher according to the invention;

2

a schematic representation of the principle of a dishwasher according to the invention;

3

in a perspective side view a collection pot of the dishwasher according to the invention according to a first embodiment;

4

the collection pot in a schematic side view from a different perspective 3 ;

figure 5

in a perspective plan view from above a collection pot of the dishwasher according to the invention according to an alternative embodiment;

6

the collection pot in a perspective side view figure 5 and

7

in a plan view from above the collection pot after the figures 5 and 6 .

1 shows a dishwasher 1 according to the invention in a purely schematic representation.

The dishwasher 1 has a housing 2 which, among other things, accommodates a washing container 3 . The rinsing container 3 in turn provides a rinsing chamber 4 which, when used as intended, serves to accommodate items to be washed to be cleaned.

A spraying device 5 , which is arranged inside the washing container 3 , is used to supply washing items to be cleaned with washing liquor. Preferably, such a spray device 5 has spray arms 6 and 7 which are each arranged rotatably inside the washing container 3 . In the exemplary embodiment shown, the spray device 5 has an upper spray arm 6 and a lower spray arm 7. Typically, a generic dishwasher has three spray arms, namely an upper and a lower spray arm and a middle spray arm.

The rinsing compartment 3 is accessible to the user via a charging opening 8 which can be closed in a fluid-tight manner by means of a pivotably mounted rinsing chamber door 9 .

The rinsing container 3 or the rinsing space 4 provided by the rinsing container 3 opens into one in detail in the figures 1 and 2 Collection pot 10 not shown in detail. A circulation pump 11 and a drain pump 12 are each fluidly connected to this collection pot 10 . For this purpose, a fluidic connection 15 is formed between the circulation pump 11 and the collecting pot 10 and a fluidic connection 13 is formed between the drain pump 12 and the collecting pot 10 .

The circulation pump 11 is fluidically connected to the spray arms 6 and 7 of the spray device 5 via corresponding supply lines 16 and 17, with the supply line 16 leading from the circulation pump 11 to a lower spray arm 7 and the supply line 17 from the circulation pump 11 to an upper spray arm 6. In a manner known per se, there can of course be at least one further spray element, not shown here, in particular a middle spray arm, which can be connected to the circulating pump 11 via a separate supply line.

When used as intended, the circulating pump 11 can be used to supply washing liquid either to the supply line 16 leading to the lower spray arm 7 or to the supply line 17 leading to the upper spray arm 6 .

After completion of a wash program, the used wash water is pumped out by means of the drain pump 12, for which purpose the drain pump 12 is connected to a line 14, which typically opens into the public sewage system and is discharged via the used wash water in accordance with the arrow 18.

2 shows the further construction of the dishwasher 1 according to the invention. A fresh water delivery point 26 is then provided, which can be, for example, access to the public water network, also with the interposition of a machine-side water reservoir and/or the like. What is decisive is that fresh water is supplied via the fresh water discharge point 26 with the fresh water line 21 interposed. In the exemplary embodiment shown, a check valve 22 and a fresh water softening device 24 are also provided. In the intended use case, therefore, fresh water flows from the fresh water discharge point 26 via the line 25 to the fresh water softening device 24 and from there via the Line 23 to the valve 22, which separates the line 23 from the fresh water line 21. In the intended application, the check valve 22 is open, so that fresh water can get into the fresh water line 21 via the line path described above.

The fresh water line 21 is divided into a first supply line 28 and a second supply line, which represents a bypass line 27 which will be described in more detail below. The first supply line 28 opens into the fluidic connection 15 between the collection pot 10 and the circulating pump 11 , ie the fresh water inlet 20 is formed on the suction mouth side of the circulating pump 11 . In normal operation, the circulating pump 11 is therefore directly charged with fresh water via the fresh water line 21 or the first supply line 28 connected to the fresh water line 21.

At the beginning of a washing program, the circulating pump 11 is given fresh water via the supply line 28 . As soon as a sufficient amount of fresh water has been supplied, the circulating pump 11 is put into operation and the supplied fresh water is circulated, with the circulating pump 11 supplying either the upper spray arm 6 or the lower spray arm via the supply line 16, in particular selectively or alternately Spray arm 7 supplied with fresh water. As a further alternative, a third, in particular middle, spray arm (not shown) can preferably also be supplied with fresh water via a further supply line. The fresh water fed into the washing compartment 3 in this way is used for washing dishes and collects as washing liquor in the collection pot 10, from where the washing liquor is then fed back to the circulation pump 11 via the fluidic connection 15 and is thus kept in circulation.

After the end of a washing program that has been carried out as intended, there are lye and chloride residues, in particular in the collection pot 10 and in the housing of the circulation pump 11, which must be removed in order to avoid carryover to a subsequent program step and/or a subsequent washing program. According to the invention, it is therefore provided that flushing takes place, with which the lye and/or chloride line is cleaned, that is to say in particular the collection pot 10 and the housings of the pumps 11 and 12 are freed from lye and/or chloride residues.

The flushing according to the invention provides that the dishwasher 1 is supplied with fresh water from a fresh water discharge point 26 in the manner already described above. The fresh water of the circulating pump 11 is fed on the suction mouth side and pumped from there by means of the circulating pump 11 into the collection pot 10 which is fluidically connected to the circulating pump 11 . The drain pump 12 fluidically connected to the collection pot 10 is operated at least temporarily at the same time as the circulating pump 11, so that the mixed water from fresh and residual water that collects in the collection pot 10 is pumped out.

Such rinsing takes place with a fresh water quantity of, for example, 150 ml. Such a small quantity of water is already sufficient to free the lye and/or chloride line from undesired lye and/or chloride residues as far as possible. Alternatively, more fresh water can be used for rinsing and/or the rinsing step can be repeated several times, for example five times, which leads to a total fresh water consumption of 750 ml at 150 ml per rinsing cycle.

A particular advantage of carrying out the method according to the invention is, inter alia, that only the caustic and/or chloride section to be cleaned is charged. Fresh water is not applied to the washing compartment 3 and/or to the items to be washed that may be located there, as occurs during the intermediate wash in a conventional program sequence. This has the advantage that there is virtually no heat discharged from the dishwasher 1, so that less energy is required to reheat the washing liquor in subsequent washing program steps. Carrying out the method according to the invention makes it possible to completely dispense with a conventional washing program step of intermediate washing, but at the same time to ensure that unwanted alkali and/or chloride residues are removed and not carried over to a subsequent washing program step and/or a subsequent washing program.

the Figures 3 and 4 show the collecting pot 10 of the dishwasher 1 according to the invention according to a first embodiment in different perspective views.

The collection pot 10 provides a pipe socket 29 ready. At this pipe socket 29 is the Circulation pump 11 connected on the suction side. The pipe socket 29 is therefore part of the fluidic connection 15 between the collection pot 10 and the circulating pump 11.

The pipe socket 29 is equipped with a connection piece 34 . The first supply line 28, into which the fresh water line 21 opens, is connected to this. In the intended operating case, the circulating pump 11 can be given fresh water on the suction mouth side, in that fresh water reaches the pipe socket 29 serving as the suction mouth 30 via the lines 21 and 28 and the connection piece 34 .

The collecting pot 10 is equipped with a further connecting piece 33 . A bypass line 27 , which serves as a second connection line, is connected to this connecting piece 33 , into which the fresh water line 21 also opens. The fresh water line 21 , the first supply line 28 and the bypass line 27 are fluidically coupled to one another via a common Y-piece or branch piece 35 .

In the circulation mode of a washing program operated as intended, a negative pressure is created in the pipe socket 29 . This leads to air standing in the fresh water line 21 being sucked in, which disrupts the proper operation of the circulating pump 11 . In order to avoid this, the bypass line 27 is provided, via which a pressure equalization can take place or flushing water in the collection pot 10 can be sucked in.

The collection pot 10 also has a connecting piece 31 which opens into a pipe socket and to which the feed line 16 to the lower spray arm 7 is connected. Another connection piece 32 is used for the fluidic connection of the collection pot 10 to the drain pump 12.

Another embodiment of the collection pot 10 can Figures 5 to 7 seen in different perspectives. According to this embodiment, a connecting piece 34 is provided for connecting the fresh water line 21, which opens into a chamber 36 on the collecting pot side. The chamber 36 is in turn in fluidic connection with the pipe socket 29, as is shown in particular in the illustration 6 reveals. The chamber 36 is closed by a cover 37 on the collection pot side. Like this particular the figure 5 reveals the chamber 36 opens into the pipe socket 29 and thus on the suction mouth side of the circulation pump 11 .

The advantage of the second embodiment according to Figures 5 to 7 is in particular that due to the chamber design, a bypass line 27 can be dispensed with.

Reference sign

1

dishwasher

2

housing

3

flush tank

4

dishwashing room

5

spray device

6

upper spray arm

7

lower spray arm

8th

loading opening

9

scullery door

10

collection pot

11

circulation pump

12

drain pump

13

fluidic connection

14

management

15

fluidic connection

16

supply line

17

supply line

18

arrow

19

management

20

fresh water enema

21

fresh water line

22

check valve

23

management

24

Fresh water softening device

25

management

26

fresh water delivery point

27

bypass line

28

first supply line

29

piece of pipe

30

suction mouth

31

connecting piece

32

connecting piece

33

connecting piece

34

connecting piece

35

Branch piece or Y-piece

36

chamber

37

cover

Claims (7)

1. Dishwasher, in particular a domestic dishwasher, comprising a washing container (3) which provides a washing compartment (4) for receiving washware, a collecting vessel (10) into which the washing compartment (3) opens, a circulating pump (11) and a discharge pump (12) which are each fluidically connected to the collecting vessel (10), the circulating pump (11) being connected to the collecting vessel (10) with the fluidic interposition of a pipe connection piece (29) which provides a suction mouth, and comprising a fresh water inlet (20) formed on the suction mouth side of the circulating pump (11), characterised in that

   the pipe connection piece (29) has the fresh water inlet (20) and a bypass line (27) opening into the collecting vessel (10) is provided for the pipe connection piece (29),
   or

   in that the fresh water inlet (20) opens into a chamber (36) which is provided by the collecting vessel (10) and formed on the fresh water inlet side of the pipe connection piece (29).
2. Dishwasher according to claim 1,
   characterised in that
   a fresh water line (21) is provided for connection to a fresh water delivery point (26) which, on the machine side, is connected to a first supply line (28) and to a second supply line, the first supply line (28) opening into the fresh water inlet (20) and the second supply line forming the bypass line (27).
3. Dishwasher according to claim 2,
   characterised in that
   the two supply lines (27, 28) are connected to the fresh water line (21) with the fluidic interposition of a Y-piece (35).
4. Dishwasher according to claim 1,
   characterised in that
   the chamber (36) structurally transitions into the pipe connection piece (29).
5. Method for introducing fresh water into a dishwasher (1), in particular a dishwasher (1) according to any of the preceding claims, in which the fresh water is supplied to the dishwasher (1) by a fresh water delivery point (26),
   characterised in that
   the fresh water is fed to a circulating pump (11) on the suction mouth side and from there is pumped by means of the circulating pump (11) into a collecting vessel (10) which is fluidically connected to the circulating pump (11), a discharge pump (12) which is fluidically connected to the collecting vessel (10) being operated at least temporarily at the same time as the circulating pump (11), and mixed water consisting of fresh and residual water that collects in the collecting vessel (10) being pumped out.
6. Method according to claim 5,
   characterised in that
   the fresh water fed to the circulating pump (11) is supplied to the collecting vessel (10) with the fluidic interposition of a washing compartment (4) of the dishwasher (1).
7. Method according to either claim 5 or claim 6,
   characterised in that
   the circulating pump (11) is operated at an idle speed.

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