EP4072391B1 - Domestic dishwashing machine and method - Google Patents

Description

The present invention relates to a household dishwasher and a method for calibrating such a household dishwasher.

A dishwasher has a washing container in which items to be washed can be accommodated. Spray zones can be provided in the washing container to apply fresh water and/or washing solution to the items to be washed. The spray zones can be designed, for example, as spray arms that are rotatably mounted in or on the washing container. Spray zones in the form of so-called intensive spray zones can also be provided. An intensive spray zone of this type can be provided, for example, on a dish holder that can be accommodated in the washing container. The intensive spray zone can be used to specifically clean heavily soiled items, for example. For this purpose, the intensive spray zone can be manually activated and deactivated using a valve.

In order to be able to detect whether such a manually operated intensive spray zone is active or inactive, the motor current of a circulation pump of the dishwasher can be used. However, this requires a calibration of the dishwasher when it is put into operation, which is carried out in a defined hydraulic state. Such a defined hydraulic state is a state in which the intensive spray zone is deactivated. This means that in order to put the dishwasher into operation, a user of the dishwasher must manually deactivate the intensive spray zone.

The EN 10 2017 217 989 A1 describes a household dishwasher with a washing container, a circulation pump for circulating washing liquid and/or fresh water during operation of the household dishwasher, an intensive rinsing zone provided within the washing container, which can be manually switched from a deactivated state in which the intensive rinsing zone is fluidically decoupled from the circulation pump, to an activated state in which the intensive rinsing zone is fluidically coupled to the circulation pump, and vice versa, and a control device which is designed to detect whether the intensive rinsing zone is in the deactivated state or in the activated state, and which is designed to, depending on the detected Condition of the intensive rinsing zone to adapt a rinsing program of the household dishwasher.

Against this background, an object of the present invention is to provide an improved household dishwasher.

Accordingly, a household dishwasher is proposed with a washing container for holding wash ware, a hydraulic circuit for circulating fresh water and/or washing liquor in the washing container, a pumping device for supplying the hydraulic circuit with the fresh water and/or the washing liquor and a closure made of a water-soluble material. During a one-time calibration process of the household dishwasher, the closure decouples part of the hydraulic circuit from the pumping device. The closure dissolves in the fresh water and/or the washing liquor during and/or after the calibration process has ended. The hydraulic circuit has several spray zones, the closure decouples at least one of the spray zones from the pumping device, the one-time calibration process ensuring that it is possible to reliably detect which of the spray zones is active.

The closure allows a defined hydraulic state of the hydraulic circuit to be created. With the help of the closure, for example, an intensive spray zone as previously explained or any other spray zone can be deactivated for the calibration process. This means that a user does not have to take any precautions for the calibration process or for starting up the household dishwasher. This simplifies the handling of the household dishwasher.

The washing container is preferably cuboid-shaped. The washing container can be closed using a door that is pivotably attached to the washing container. Several washware receptacles, such as a lower basket, an upper basket and a cutlery drawer, can be provided in the washing container. Washware can be accommodated in the washware receptacles, which are then treated with fresh water and/or washing solution using the hydraulic circuit. In this case, "wash solution" is understood to mean water mixed with a cleaning agent and/or dirt particles detached from the washware.

The pumping device is preferably a circulation pump of the household dishwasher. The pumping device can be provided in particular on a pump sump of the washing container. The pump sump is in turn arranged on a bottom of the washing container. The fact that the pumping device "charges" the hydraulic circuit with fresh water and/or washing liquor means in this case that the pumping device pumps the fresh water and/or the washing liquor through the hydraulic circuit. The pumping device can, but does not have to, be part of the hydraulic circuit.

The calibration process is preferably carried out when the household dishwasher is put into operation. The fact that part of the hydraulic circuit is "uncoupled" from the pumping device is to be understood in this case in particular to mean that the closure fluidically separates part of the hydraulic circuit from the pumping device. This means that the pumping device cannot pump fresh water and/or washing solution into this part of the hydraulic circuit. The closure is preferably completely dissolved after the calibration process has been completed. However, residues of the closure can also only completely dissolve in subsequent wash cycles.

The hydraulic circuit has several spray zones, wherein the closure decouples at least one of the spray zones from the pumping device.

The spray zones can, for example, be spray arms mounted in or on the washing container. However, the spray zones can also comprise one or more so-called intensive spray zones, which are arranged, for example, on a dishware holder as previously explained. The closure is suitable for decoupling a spray zone designed as a spray arm or as an intensive spray zone from the pump device. The closure can also decouple several of the spray zones from the pump device.

According to a further embodiment, the at least one spray zone decoupled from the pump device by means of the closure can be brought from an activated state to a deactivated state by means of a valve.

The valve is preferably a switching valve. A "switching valve" or an "on-off valve" is understood here to mean in particular a valve that enables the Spray zone to switch back and forth between the activated state and the deactivated state without being able to move to intermediate positions. The valve is preferably a manually operated valve. Alternatively, the valve can also be electrically controlled. For example, the valve can be a solenoid valve.

According to a further embodiment, the closure is arranged upstream of the valve.

In this case, "upstream" means that the closure is arranged upstream of the valve in the direction of flow of the fresh water and/or the rinsing solution. This has the advantage that the closure can then dissolve both when the valve is open and when the valve is closed. However, the closure can also be arranged downstream of the valve. In this case, the closure only dissolves when the valve is open and the spray zone is in its activated state. In this case, "downstream" means that the closure is arranged downstream of the valve in the direction of flow of the fresh water and/or the rinsing solution.

According to a further embodiment, the at least one spray zone decoupled from the pump device by means of the closure is an intensive spray zone.

The intensive spray zone can also be referred to as an intensive rinsing zone. The intensive spray zone can, as previously mentioned, be arranged on one of the washware holders, for example. However, the intensive spray zone can also be positioned on the side walls of the washing container, on a ceiling thereof or on a rear wall of the washing container. The spray zones that are not decoupled from the pump device by means of the closure are preferably spray arms. However, this is not mandatory.

According to a further embodiment, the at least one spray zone decoupled from the pump device by means of the closure and a further spray zone are connected to the pump device by means of a common supply line.

In particular, the supply line branches off in front of the two spray zones. A distribution element can be provided for this purpose. Alternatively, the two spray zones can each have their own supply line.

According to a further embodiment, the closure is arranged between the spray zone, which is decoupled from the pump device by means of the closure, and the supply line.

This means that the spray zone which is not disconnected from the pumping device by means of the closure can continue to be supplied with fresh water and/or rinsing solution by means of the supply line.

According to a further embodiment, the household dishwasher further comprises a water switch arranged downstream of the pump device for activating and deactivating the spray zones.

Preferably, the water diverter can be controlled using a control device of the household dishwasher. The water diverter is suitable for supplying individual spray zones or all spray zones simultaneously with fresh water and/or washing solution. The water diverter is arranged in particular between the pump device and the spray zones.

According to a further embodiment, the household dishwasher further comprises a control device for detecting a motor current of the pump device during the calibration process.

The motor current changes depending on which spray zone is active or inactive. As mentioned above, because part of the hydraulic circuit is decoupled from the pumping device using the closure, a defined hydraulic state can be created in which, for example, a reference operating point of the pumping device is recorded when the non-decoupled spray zone or the non-decoupled spray zones are supplied with fresh water and/or rinsing solution.

According to a further embodiment, the closure is made of a water-soluble plastic material, in particular polyvinyl alcohol.

However, the closure can be made of any other water-soluble material. For example, the closure can also be made of salt, sugar or wax.

Furthermore, a method for calibrating a household dishwasher with a washing container for holding wash ware, a hydraulic circuit for circulating fresh water and/or washing liquor in the washing container and a pumping device for supplying the hydraulic circuit with the fresh water and/or the washing liquor is proposed. The method comprises the following steps: a) decoupling part of the hydraulic circuit from the pumping device during a one-time calibration process of the household dishwasher using a closure made of a water-soluble material and b) dissolving the closure during and/or after completion of the calibration process in the fresh water and/or the washing liquor. In step a), at least one spray zone of several spray zones of the hydraulic circuit is decoupled from the pumping device using the closure, the one-time calibration process ensuring that it is possible to reliably detect which of the spray zones is active.

The method is particularly suitable for calibrating or commissioning a domestic dishwasher as described above. The method can be referred to as a calibration method or a commissioning method. Steps a) and b) can be carried out consecutively or simultaneously.

According to one embodiment, in step b) the closure dissolves depending on a temperature of the fresh water and/or the rinsing solution and/or a duration of contact of the closure with the fresh water and/or the rinsing solution.

This makes it possible, for example, to completely and specifically release the closure towards the end of the calibration process with the help of a suitable temperature control.

In step a), at least one spray zone of several spray zones of the hydraulic circuit is decoupled from the pump device by means of the closure.

In particular, an intensive spray zone as mentioned above is decoupled from the other spray zones.

According to a further embodiment, in step a) the closure is arranged in or on a supply line of the at least one spray zone decoupled from the pump device by means of the closure.

The arrangement of the closure can, for example, be carried out before the household dishwasher is assembled. In particular, the arrangement of the closure can already be carried out by a supplier.

According to a further embodiment, a motor current of the pump device is detected during the calibration process with the aid of a control device.

When the household dishwasher is in operation, the control device can detect which of the spray zones is active and which of the spray zones is inactive by monitoring and/or evaluating the motor current.

Other possible aspects of the household dishwasher and/or the method also include combinations of features or embodiments described above or below with regard to the exemplary embodiments that are not explicitly mentioned. The person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the household dishwasher and/or the method.

• Fig. 1 zeigt eine schematische perspektivische Ansicht einer Ausführungsform einer Haushalts-Geschirrspülmaschine;
• Fig. 2 zeigt eine stark schematisierte Ansicht der Haushalts-Geschirrspülmaschine gemäß Fig. 1;
• Fig. 3 zeigt eine stark schematisierte Ansicht einer weiteren Ausführungsform einer Haushalts-Geschirrspülmaschine; und
• Fig. 4 zeigt ein schematisches Blockdiagramm einer Ausführungsform eines Verfahrens zum Kalibrieren der Haushalts-Geschirrspülmaschine gemäß Fig. 1 oder Fig. 3.

Further advantageous embodiments and aspects of the household dishwasher and/or the method are the subject of the subclaims and the embodiments of the household dishwasher and/or the method described below. The household dishwasher and/or the method are explained in more detail below using preferred embodiments with reference to the attached figures.

• Fig.1 shows a schematic perspective view of an embodiment of a household dishwasher;
• Fig.2 shows a highly schematic view of the household dishwasher according to Fig.1 ;
• Fig.3 shows a highly schematic view of another embodiment of a household dishwasher; and
• Fig.4 shows a schematic block diagram of an embodiment of a method for calibrating the household dishwasher according to Fig.1 or Fig.3 .

In the figures, identical or functionally equivalent elements have been given the same reference numerals, unless otherwise stated.

The Fig.1 shows a schematic perspective view of an embodiment of a household dishwasher 1. The household dishwasher 1 comprises a washing container 2 which can be closed by a door 3, in particular in a watertight manner. For this purpose, a sealing device can be provided between the door 3 and the washing container 2. The washing container 2 is preferably cuboid-shaped. The washing container 2 can be arranged in a housing of the household dishwasher 1. The washing container 2 and the door 3 can form a washing chamber 4 for washing dishes.

Door 3 is in the Fig.1 shown in its open position. The door 3 can be closed or opened by pivoting about a pivot axis 5 provided at a lower end of the door 3. With the help of the door 3, a loading opening 6 of the washing container 2 can be closed or opened. The washing container 2 has a base 7, a ceiling 8 arranged opposite the base 7, a rear wall 9 arranged opposite the closed door 3 and two side walls 10, 11 arranged opposite one another. The base 7, the ceiling 8, the rear wall 9 and the side walls 10, 11 can be made from a stainless steel sheet, for example. Alternatively, the base 7 can be made from a plastic material, for example.

The household dishwasher 1 further comprises at least one dishware holder 12 to 14. Preferably, several, for example three, dishware holders 12 to 14, whereby the dishware holder 12 can be a lower dishware holder or a lower basket, the dishware holder 13 can be an upper dishware holder or an upper basket and the dishware holder 14 can be a cutlery drawer. As the Fig.1 further shows, the washware holders 12 to 14 are arranged one above the other in the washing container 2. Each washware holder 12 to 14 can be moved either into or out of the washing container 2. In particular, each washware holder 12 to 14 can be pushed or moved into the washing container 2 in an insertion direction E and pulled or moved out of the washing container 2 in an extraction direction A opposite to the insertion direction E.

The Fig. 2 shows a highly schematic view of the household dishwasher 1. The household dishwasher 1 comprises a control device 15. The control device 15 is preferably a regulating and control device. With the help of the control device 15, for example, different washing programs of the household dishwasher 1 can be carried out. For this purpose, washing programs can be stored or saved in the control device 15. The control device 15 is preferably arranged outside the washing container 2. The control device 15 can be arranged in or on the door 3. The control device 15 is preferably provided on an upper edge of the door 3. The control device 15 can be operated or actuated with the help of operating elements not shown. The operating elements can comprise, for example, keys, buttons and/or touchscreens.

The domestic dishwasher 1 further comprises a pump device 16. The pump device 16 is a circulation pump. The pump device 16 can be arranged on a pump sump (not shown) of the washing container 2. The pump sump is provided on the bottom 7 of the washing container 2. The pump device 16 can be arranged in or on the pump sump. The pump device 16 is preferably positioned outside the washing container 2. However, the pump device 16 can also be arranged at least partially inside the washing container 2.

Furthermore, the household dishwasher 1 comprises a hydraulic circuit 17 for circulating fresh water and/or washing liquor F in the washing container 2. In the present case, "washing liquor" can be understood to mean water containing a cleaning agent and/or dirt particles detached from the items to be washed. The hydraulic circuit 17 comprises several spray zones 18, 19. The spray zones 18, 19 can, for example, be spray arms that are rotatably mounted in the washing container 2. The spray zones 18, 19 can, however, also be so-called intensive spray zones. Each spray zone 18, 19 has a plurality of spray nozzles for distributing the fresh water and/or the washing solution F in the washing container 2.

The spray zone 18 is in fluid connection with the pump device 16 by means of a supply line 20. The pump device 16 can supply the spray zone 18 with fresh water and/or rinsing solution F via the supply line 20. The spray zone 19 is assigned a supply line 21 which fluidically connects the spray zone 19 with the pump device 16. The pump device 16 can supply the spray zone 19 with fresh water and/or rinsing solution F via the supply line 21. Each spray zone 18, 19 can be assigned its own supply line 20, 21. Alternatively, both spray zones 18, 19 can have a common supply line which branches off.

A water switch (not shown) can be provided between the pump device 16 and the supply lines 20, 21, which makes it possible to supply either only one of the spray zones 18, 19 or both spray zones 18, 19 with fresh water and/or rinsing solution F at the same time. Furthermore, the supply lines 20, 21 or one of the supply lines 20, 21 can have a valve, in particular a switching valve, which makes it possible to decouple the respective spray zone 18, 19 from the pump device 16. The valve can be a manually operated valve, for example. However, the valve can also be controlled electronically.

A closure 22 made of a water-soluble material can be provided in or on one of the two supply lines 20, 21. The closure 22 closes or blocks the supply line 20, 21 in or on which the closure 22 is arranged. The water-soluble material can be, for example, a polyvinyl alcohol, a water-soluble salt, sugar, a water-soluble wax or the like. The closure 22 can comprise a mixture of different materials. Water-insoluble materials, for example as fillers, can also be combined with water-soluble materials.

The closure 22 can, as in the Fig.2 shown, be provided in or on the supply line 21. However, the closure 22 can also be provided in or on the supply line 20. With the help of the closure 22 it is possible to decouple a part of the hydraulic circuit 17, in this case the spray zone 19, from the pump device 16. In this case, "decoupling" is to be understood as meaning that the pump device 16 cannot supply the spray zone 19 with fresh water and/or rinsing solution F due to the closure 22 provided in or on the supply line 21. This means that the spray zone 19 is fluidically separated from the pump device 16.

The functionality of the closure 22 is explained below. The control device 15 is suitable for detecting a motor current I of the pump device 16 and using the motor current I to determine which of the spray zones 18, 19 is active. The pump device 16 receives different motor currents I in the event that only the spray zone 18, only the spray zone 19 or both spray zones 18, 19 are active. In particular, the control device 15 can detect which of the spray zones 18, 19 is active based on a motor current difference or a motor current delta.

However, this requires a calibration or a calibration process of the household dishwasher 1 when it is put into operation. The calibration ensures that it is possible to reliably detect which of the spray zones 18, 19 is active. This calibration is carried out in a defined hydraulic state of the household dishwasher 1. This defined hydraulic state is achieved by decoupling part of the hydraulic circuit 17 from the pump device 16 using the closure 22. In the present case, the calibration is carried out in such a way that the spray zone 18 is active and the spray zone 19 is inactive. This is achieved by the closure 22 decoupling the spray zone 19 from the pump device 16. This decoupling takes place without any user intervention. After or during the calibration process, the closure 22 dissolves in the fresh water and/or the washing solution F.

The closure 22 ensures that a user does not inadvertently activate both spray zones 18, 19 when starting up the household dishwasher 1. The closure 22 slowly dissolves when it comes into contact with fresh water and/or washing solution F, so that both spray zones 18, 19 are activated after the calibration process has been completed. The calibration process of the household dishwasher 1 can thus be carried out in a defined hydraulic state, regardless of whether the spray zone 19 is active or inactive. The closure 22 then dissolves depending on the temperature of the fresh water and/or the rinsing solution F and the duration of exposure to the fresh water and/or the rinsing solution F. The time until the closure 22 dissolves can be influenced or controlled, for example, with the aid of its composition and/or a temperature control of the fresh water and/or the rinsing solution F.

Regardless of the setting of the respective spray zone 18, 19 by a user, the calibration can always be carried out reliably. This increases the robustness of the operation of the household dishwasher 1. The closure 22 can, for example, be introduced into the respective supply line 20, 21 during the assembly of the hydraulic circuit 17. The closure 22 is also not destroyed by a valve assigned to the respective spray zone 18, 19 before the first wash cycle. This results in cost savings and easy handling for the user.

Furthermore, no additional notice is required on the household dishwasher 1 to inform the user of the need to deactivate the spray zone 19. This results in further cost savings and avoidance of waste. Calibration takes place without the user having to do anything when the machine is first put into operation. This makes it easy to operate. Because the calibration is carried out by the user, calibration in the final production can be dispensed with. This results in further cost savings.

The Fig.3 shows a highly schematic view of another embodiment of a household dishwasher 1. In the following, only differences to the household dishwasher 1 according to the Fig.1 and 2 In addition to the washing container 2, the household dishwasher 1 comprises a base support 23 which supports the washing container 2. The base support 23 is, for example, a plastic component, in particular a plastic injection-molded component.

A pump sump 24 is provided on the base 7. The pump device 16 is arranged on the pump sump 24. For example, the pump device 16 can be connected to the pump sump 24 by means of a supply line 25. A water switch 26 is provided downstream of the pump device 16. The water switch 26 is coupled to the pump device 16 by means of a supply line 27, for example.

The household dishwasher 1 further comprises a hydraulic circuit 17 as previously explained. The hydraulic circuit 17 comprises a spray zone 28, which is designed as a spray arm rotatably mounted in the washing container 2. The hydraulic circuit 17 further comprises a further spray zone 29, which is also designed as a spray arm rotatably provided in the spray container 2. Each spray zone 28, 29 comprises a plurality of spray nozzles for evenly distributing fresh water and/or washing solution F in the washing container 2.

For example, the spray zone 28 is assigned to the dishware holder 12 and the spray zone 29 is assigned to the dishware holder 13. The spray zone 28 is coupled to the water switch 26 by means of a supply line 30. The spray zone 29 is coupled to the water switch 26 by means of a supply line 31. With the help of the water switch 26, for example, during the course of a dishwashing program either only the spray zone 28, only the spray zone 29 or both spray zones 28, 29 can be supplied with fresh water and/or rinsing solution F at the same time.

The hydraulic circuit 17 also comprises a further spray zone 32, which is designed as a so-called intensive spray zone. The spray zone 32 also comprises a large number of spray nozzles. For example, the spray zone 32 can be attached to the dishware holder 13. The spray zone 32 is also fluidically coupled to the pump device 16 via the supply line 31. However, a valve 33 is provided between the supply line 31 and the spray zone 32, with the aid of which the spray zone 32 can be fluidically decoupled from the hydraulic circuit 17 and coupled to it again. The valve 33 can be operated manually by a user, so that he can deactivate and activate the spray zone 32. The valve 33 is a switching valve. This means that the valve 33 is either completely open or completely closed. The valve 33 can be an on-off valve.

Upstream of the valve 33, a closure 22 made of a water-soluble material is provided as previously explained. The closure 22 can be provided on or in a distribution element 34 that is suitable for distributing the fresh water and/or the rinsing solution F to the spray zones 29, 32. However, the closure 22 can also be provided downstream of the valve 33. "Upstream" in the present case means arranged upstream of the valve 33 in a flow direction of the fresh water and/or the rinsing solution F. "Downstream" in the present case means arranged downstream of the valve 33 in the flow direction of the fresh water and/or the rinsing solution F.

The functionality of the household dishwasher 1 according to the Fig.3 essentially corresponds to the functionality of the household dishwasher 1 according to the Fig.1 and 2 In order to be able to detect whether the manually operable spray zone 32 is active or inactive during operation of the domestic dishwasher 1 with the aid of the control device 15, it is necessary to calibrate the domestic dishwasher 1. This calibration takes place, as previously mentioned, in a defined hydraulic state.

This defined hydraulic state can be achieved by deactivating the spray zone 32 when the household dishwasher 1 is put into operation or calibrated. This deactivation is ensured by the closure 22. The switching position of the valve 33 is irrelevant for the deactivation of the spray zone 32 when the household dishwasher 1 is put into operation. During calibration, with the help of controlling the water switch 26 via the control device 15, a calibration can take place during operation of the spray zone 29, the spray zone 28 or both spray zones 28, 29. After calibration has been completed or during calibration, the closure 22 dissolves. The operating state of the spray zone 32 can be recognized after calibration with the help of a change in the motor current I.

The Fig.4 shows a schematic block diagram of an embodiment of a method for calibrating the household dishwasher 1 according to the Fig.1 and 2 and the household dishwasher 1 in accordance with Fig.3 .

In a step S1, a part of the hydraulic circuit 17 is decoupled from the pump device 16 during a one-time calibration process of the household dishwasher 1 by means of the closure 22 made of a water-soluble material.

Thereafter or simultaneously, during and/or after completion of the calibration process, the closure 22 dissolves in the fresh water and/or the rinsing solution F.

In particular, the closure 22 dissolves in step S2 depending on a temperature of the fresh water and/or the rinsing solution F and/or a duration of contact of the closure 22 with the fresh water and/or the rinsing solution F. In step S1, at least one of the spray zones 19, 32 of several of the spray zones 18, 19, 28, 29, 32 of the hydraulic circuit 17 is decoupled from the pump device 16 with the aid of the closure 22. Furthermore, in step S1, the closure 22 is arranged in or on one of the supply lines 21, 31 of the at least one spray zone 19, 32 decoupled from the pump device 16 with the aid of the closure 22.

Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

Reference symbols used:

1

Household dishwasher

2

Rinse container

3

door

4

Washing room

5

Swivel axis

6

Loading opening

7

Floor

8th

Ceiling

9

Back wall

10

Side wall

11

Side wall

12

Dishwasher intake

13

Dishwasher intake

14

Dishwasher intake

15

Control device

16

Pumping device

17

Hydraulic circuit

18

Spray zone

19

Spray zone

20

Supply line

21

Supply line

22

Closure

23

Base carrier

24

Pump sump

25

Supply line

26

Water switch

27

Supply line

28

Spray zone

29

Spray zone

30

Supply line

31

Supply line

32

Spray zone

33

Valve

34

Distribution element

A

Extraction direction

E

Insertion direction

F

Fresh water and/or rinsing water

I

Motor current

S1

Step

S2

Step

Claims (13)

1. Household dishwasher (1) with a dishwasher cavity (2) for receiving items to be washed, a hydraulic circuit (17) for circulating fresh water and/or wash liquor (F) in the dishwasher cavity (2), a pump device (16) for applying fresh water and/or wash liquor (F) to the hydraulic circuit (17), wherein the hydraulic circuit has a number of spray zones (18, 19, 28, 29, 32), characterised in that the household dishwasher (1) comprises a closure (22) manufactured from a water-soluble material, wherein the closure (22) disconnects part of the hydraulic circuit (17) from the pump device (16) during a one-time calibration process of the household dishwasher (1) and which dissolves in the fresh water and/or wash liquor (F) during and/or after completion of the calibration process, wherein the closure (22) disconnects at least one of the spray zones (19, 32) from the pump device (16) and wherein the one-time calibration process ensures that it is reliably possible to identify which of the spray zones (18, 19, 28, 29, 32) is active.
2. Household dishwasher according to claim 1, characterised in that the at least one spray zone (32) disconnected from the pump device (16) with the aid of the closure (22) can be brought from an activated state into a deactivated state with the aid of a valve (33).
3. Household dishwasher according to claim 2, characterised in that the closure (22) is arranged upstream of the valve (33).
4. Household dishwasher according to one of claims 1 - 3, characterised in that the at least one spray zone (32) disconnected from the pump device (16) with the aid of the closure (22) is an intensive spray zone.
5. Household dishwasher according to one of claims 1 - 4, characterised in that the at least one spray zone (32) disconnected from the pump device (16) with the aid of the closure (22) and a further spray zone (29) are connected to the pump device (16) with the aid of a shared supply line (31).
6. Household dishwasher according to claim 5, characterised in that the closure (22) is arranged between the spray zone (32) disconnected from the pump device (16) with the aid of the closure (22) and the supply line (31).
7. Household dishwasher according to one of claims 1 - 6, further comprising a water switch (26) arranged downstream of the pump device (16) for activating and deactivating the spray zones (18, 19, 28, 29, 32).
8. Household dishwasher according to one of claims 1 - 7, further comprising a control device (15) for detecting a motor current (I) of the pump device (16) during the calibration process.
9. Household dishwasher according to one of claims 1 - 8, characterised in that the closure (22) is manufactured from a water-soluble plastic material, in particular from polyvinyl alcohol.
10. Method for calibrating a household dishwasher (1) with a dishwasher cavity (2) for receiving items to be washed, a hydraulic circuit (17) for circulating fresh water and/or wash liquor (F) in the dishwasher cavity (2) and a pump device (16) for applying fresh water and/or wash liquor (F)to the hydraulic circuit (17), characterised in that the method comprises the following steps:

    a) disconnecting (S1) part of the hydraulic circuit (17) from the pump device (16) during a one-time calibration process of the household dishwasher (1) with the aid of a closure (22) manufactured from a water-soluble material, and

    b) dissolving (S2) the closure (22) in the fresh water and/or the wash liquor (F) during and/or after completion of the calibration process, wherein in step a) at least one spray zone (19, 32) of a number of spray zones (18, 19, 28, 29, 32) of the hydraulic circuit (17) is disconnected from the pump device (16) with the aid of the closure (22), and wherein the one-time calibration process ensures that it is reliably possible to identify which of the spray ones (18, 19, 28, 29, 32) is active.
11. Method according to claim 10, characterised in that in step b) the closure (22) dissolves as a function of a temperature of the fresh water and/or the wash liquor (F) and/or a duration of a contact of the closure (22) with the fresh water and/or the wash liquor (F).
12. Method according to claim 10 or 11, characterised in that in step a), the closure (22) is arranged in or on a supply line (21, 31) of the at least one spray zone (19, 32) disconnected from the pump device (16) with the aid of the closure (22).
13. Method according to one of claims 10 - 12, characterised in that a motor current (I) of the pump device (16) is detected during the calibration process with the aid of a control device (15).

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