EP4072391A1

EP4072391A1 - Domestic dishwashing machine and method

Info

Publication number: EP4072391A1
Application number: EP20817326.0A
Authority: EP
Inventors: Bernd Eisenbart; Vitus HÖRMANN; Bernd KRÄNZLE
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2019-12-13
Filing date: 2020-12-02
Publication date: 2022-10-19
Anticipated expiration: 2040-12-02
Also published as: DE102019219605A1; EP4072391B1; CN114786556A; US20230022919A1; WO2021115870A1; DE102019219605B4

Abstract

The invention relates to a domestic dishwashing machine (1) with a washing compartment (2) for receiving dishes to be washed, a hydraulic circuit (17) for circulating fresh water and/or wash liquor (F) in the washing compartment (2), a pump device (16) for delivering to the hydraulic circuit (17) fresh water and/or the wash liquor (F), and a closure (22) made from a water-soluble material, which closure disconnects a part of the hydraulic circuit (17) from the pump device (16) during a one-time calibration process for the domestic dishwashing machine (1) and which dissolves in the fresh water and/or the wash liquor (F) during and/or after the conclusion of the calibration process.

Description

Household Dishwasher and Process

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. In order to apply fresh water and / or washing liquor to the items to be washed, spray zones can be provided in the washing container. The spray zones can be designed, for example, as spray arms rotatably mounted in or on the washing container. Furthermore, spray zones in the form of so-called intensive spray zones can also be provided. Such an intensive spray zone can be provided, for example, on a washware receptacle that can be accommodated in the wash compartment. With the help of the intensive spray zone, for example, heavily soiled items can be cleaned in a targeted manner. To do this, the intensive spray zone can be activated and deactivated manually 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 calibration of the dishwasher during commissioning, which is carried out with a defined hydraulic state. Such a defined hydraulic state is a state in which the intensive spray zone is deactivated. That is, in order to start the dishwasher, it is necessary for a user of the dishwasher to manually deactivate the intensive spray zone.

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

Accordingly, a household dishwasher with a washing container to take on items to be washed, a hydraulic circuit for circulating fresh water and / or washing liquor in the washing container, a pumping device for applying the hydraulic circuit with the fresh water and / or the washing liquor and one made of a water-soluble material Closure suggested. The closure couples the household dishwasher machine part of the hydraulic circuit from the pumping device. The closure dissolves in the fresh water and / or the rinsing solution during and / or after the calibration process has ended.

Because the closure is provided, a defined hydraulic state of the hydraulic circuit can be established. With the aid of the closure, for example, an intensive spray zone as explained above 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. The washing container can be closed with the aid of a door hinged on the washing container such that it can pivot. Several washware receptacles, for example a lower basket, an upper basket and a cutlery drawer, can be provided in the washing container. Wash ware can be accommodated in the wash ware receptacles, and fresh water and / or wash liquor are applied to them with the aid of the hydraulic circuit. In the present case, “washing liquor” is to be understood as meaning water mixed with a cleaning agent and / or dirt particles detached from the items to be washed.

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

The calibration process is preferably carried out when the domestic dishwasher is started up. The fact that part of the hydraulic circuit is "decoupled" from the pumping device is to be understood in the present case in particular as the fact that the closure fluidically separates part of the hydraulic circuit from the pumping device. This means that the pumping device cannot pump any fresh water and / or rinsing solution into this part of the hydraulic circuit. The closure is preferably after completion the calibration process is completely resolved. However, residues of the closure can only dissolve completely in subsequent wash cycles.

According to one embodiment, the hydraulic circuit has a plurality of spray zones, the closure uncoupling 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 compartment. The spray zones can, however, also comprise one or more so-called intensive spray zones, which are arranged, for example, on a washware receptacle as explained above. The closure is suitable for decoupling a spray zone designed as a spray arm or as an intensive spray zone from the pumping device. The closure can also decouple several of the spray zones from the pumping device.

According to a further embodiment, the at least one spray zone, which is decoupled from the pumping device with the aid of the closure, can be brought from an activated state to a deactivated state with the aid of a valve.

The valve is preferably a switching valve. In the present case, a “switching valve” or an “open-close valve” is to be understood in particular as a valve that enables the spray zone to be switched 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, however, the valve can also be controlled electrically. For example, the valve can be a solenoid valve.

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

In the present case, “upstream” is to be understood as meaning that the closure is arranged upstream of the valve in a flow direction 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 will only be released when the valve is open and the spray zone is in its activated position State. “Downstream” means in the present case that the closure is arranged in the flow direction of the fresh water and / or the rinsing solution after the valve.

According to a further embodiment, the at least one spray zone, which is decoupled from the pumping device with the aid of the closure, is an intensive spray zone.

The intensive spray zone can also be referred to as the intensive rinse zone. The intensive spray zone can, as mentioned above, be arranged on one of the items to be washed, for example. The intensive spray zone can, however, also be positioned on the side walls of the rinsing container, on a ceiling of the same or on a rear wall of the washing container. The spray zones which are not decoupled from the pumping device with the aid of the closure are preferably spray arms. However, this is not mandatory.

According to a further embodiment, the at least one spray zone, which is decoupled from the pump device with the aid of the closure, and a further spray zone are connected to the pump device with the help of a common feed line.

In particular, the feed 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 pumping device with the aid of the closure, and the supply line.

This means that that spray zone which is not decoupled from the pump device with the aid of the closure can continue to be supplied with fresh water and / or washing liquor with the aid of the supply line.

According to a further embodiment, the household dishwasher further comprises a water switch arranged downstream of the pumping device for activating and deactivating the spray zones. The water switch can preferably be controlled with the aid of a control device of the domestic dishwasher. The water switch is suitable for supplying individual spray zones or all spray zones simultaneously with fresh water and / or washing solution. The water switch is arranged in particular between the pumping 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. Because part of the hydraulic circuit is decoupled from the pump device with the aid of the closure, a defined hydraulic state can be generated, as mentioned above, in which, for example, a reference operating point of the pump device when the spray zone or not decoupled is applied the non-uncoupled spray zones with fresh water and / or rinsing solution is recorded.

According to a further embodiment, the closure is made from a water-soluble plastic material, in particular from 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 egg nem washing container for receiving items to be washed, a hydraulic circuit for circulating fresh water and / or washing liquid in the washing container and a pumping device for charging the hydraulic circuit with the fresh water and / or the washing liquid is proposed. The method comprises the following steps: a) uncoupling part of the hydraulic circuit from the pump device during a one-time calibration process of the household dishwasher with the aid of a closure made of a water-soluble material and b) opening the closure during and / or after the end of the Calibration process in the fresh water and / or the wash liquor. The method is particularly suitable for calibrating or starting up a household dishwasher as explained above. The procedure can be referred to as a calibration procedure or as a commissioning procedure. Steps a) and b) can be carried out consecutively or simultaneously.

According to one embodiment, the closure dissolves in step b) as a function of 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 selectively dissolve the seal towards the end of the calibration process with the aid of suitable temperature control.

According to a further embodiment, in step a) at least one spray zone of several spray zones of the hydraulic circuit is decoupled from the pumping device with the aid 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 feed line of the at least one spray zone decoupled from the pumping device with the aid of the closure.

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

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

When the domestic dishwasher is in operation, the control device can use a monitoring and / or evaluation of the motor current to identify which of the spray zones is active and which of the spray zones is inactive. Further possible aspects of the household dishwasher and / or the method also include combinations, not explicitly mentioned, of features or embodiments described above or below with regard to the exemplary embodiments. 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.

Further advantageous configurations and aspects of the domestic dishwasher and / or the method are the subject matter of the subclaims and the exemplary embodiments of the domestic dishwasher and / or the method described below. In the following, the household dishwasher and / or the method will be explained in more detail on the basis of preferred embodiments with reference to the attached figures.

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 a further 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, elements that are the same or have the same function have been given the same reference symbols, unless otherwise stated.

1 shows a schematic perspective view of an embodiment of a domestic dishwasher 1. The domestic dishwasher 1 comprises a washing compartment 2 which can be closed, in particular watertight, by a door 3. 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. The rinsing container 2 can be in one housing of the household dishwasher 1 be arranged. The washing compartment 2 and the door 3 can form a washing area 4 for washing items to be washed.

The door 3 is shown in FIG. 1 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 aid of the door 3, a loading opening 6 of the washing compartment 2 can be closed or opened. The washing compartment 2 has a base 7, a ceiling 8 disposed opposite the base 7, a rear wall 9 disposed opposite the closed door 3, and two side walls 10, 11 disposed opposite one another. The floor 7, the ceiling 8, the rear wall 9 and the side walls 10, 11 can be made of stainless steel sheet, for example. Alternatively, for example, the bottom 7 can be made of a plastic material.

The domestic dishwasher 1 also has at least one washware receptacle 12 to 14. Preferably, several, for example three, washware receptacles 12 to 14 can be provided, the washware receptacle 12 being a lower washware receptacle or a lower basket, the washware receptacle 13 an upper washware receptacle or an upper basket and the washware receptacle 14 a cutlery drawer. As FIG. 1 also shows, the items to be washed 12 to 14 are net angeord one above the other in the washing container 2. Each washware receptacle 12 to 14 can optionally be moved into or out of the wash container 2. In particular, each washware receptacle 12 to 14 can be pushed or moved into the washing container 2 in an insertion direction E and can be pulled out or pulled out of the washing container 2 in a pull-out direction A counter to the insertion direction E.

2 shows a highly schematic view of the domestic dishwasher 1. The domestic 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 domestic dishwasher 1 can be carried out. For this purpose 15 washing programs can be deposited or stored in the control device. The control device 15 is preferably arranged outside of the washing compartment 2. The control device 15 can be arranged in or on the door 3. The control device 15 is preferably at an upper edge the door 3 is provided. The control device 15 can be operated or operated with the help of operating elements not shown. The operating elements can include, for example, buttons, buttons and / or touchscreens.

The domestic dishwasher 1 further comprises a pump device 16. The pump device 16 is a circulating 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 pumping device 16 is preferably positioned outside of the washing compartment 2. The pumping device 16 can, however, also be arranged at least partially inside the washing compartment 2.

The household dishwasher 1 also includes a hydraulic circuit 17 for circulating fresh water and / or washing liquor F in the washing compartment 2. "Rinsing liquor" can be understood in the present case to be water provided with a cleaning agent and / or with dirt particles detached from the washware. The hydraulic circuit 17 comprises several spray zones 18, 19. The spray zones 18, 19 can, for example, be spray arms mounted rotatably in the washing container 2. However, the spray zones 18, 19 can also be so-called intensive spray zones. Each spray zone 18, 19 has a large number of spray nozzles for distributing the fresh water and / or the rinsing liquor F in the rinsing container 2.

The spray zone 18 is in fluid connection with the pump device 16 by means of a supply line 20. The pumping device 16 can apply fresh water and / or washing solution F to the spray zone 18 via the supply line 20. The spray zone 19 is assigned a feed line 21 which fluidly connects the spray zone 19 to the pumping device 16. The pumping device 16 can apply fresh water and / or washing liquor F to the spray zone 19 via the feed line 21. Each spray zone 18, 19 can have its own supply line 20, 21 assigned to it. Alternatively, the two spray zones 18, 19 can also have a common feed line that branches off.

A water switch (not shown) can be provided between the pumping 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 washing solution F at the same time apply io. Furthermore, the feed lines 20, 21 or one of the feed 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 pumping device 16. The valve can, for example, be a manually operated valve. However, the valve can also be controlled electronically.

In or on one of the two feed lines 20, 21, a closure 22 can be provided, which is made of a water-soluble material. The closure 22 closes or blocks that 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 shown in FIG. 2, be provided in or on the supply line 21. The closure 22 can, however, also be provided in or on the supply line 20. With the aid of the closure 22 it is possible to decouple part of the hydraulic circuit 17, in front of the spray zone 19, from the pumping device 16. In the present case, “uncoupling” is to be understood as meaning that the pumping device 16 cannot apply fresh water and / or washing liquor F to the spray zone 19 due to the closure 22 provided in or on the supply line 21. That is to say, the spray zone 19 is fluidically separated from the pumping 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, on the basis of the motor current I, to infer 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 use a motor current difference or a motor current delta to know which of the spray zones 18, 19 is active.

For this purpose, however, a calibration or a calibration process of the domestic dishwasher 1 is required during commissioning. With the help of the calibration it is This means that it is possible to reliably identify 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 in that part of the hydraulic circuit 17 is decoupled from the pumping device 16 with the aid of 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 in that the closure 22 decouples the spray zone 19 from the pumping device 16. This decoupling takes place without any action on the part of a user. After or during the calibration process, the closure 22 dissolves in the fresh water and / or the washing liquor F.

The closure 22 ensures that a user does not inadvertently activate both spray zones 18, 19 when the domestic dishwasher 1 is started up. The closure 22 slowly dissolves on contact with fresh water and / or washing liquor F, so that both spray zones 18, 19 can be activated after the calibration process has ended. 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 as a function of the temperature of the fresh water and / or the rinsing liquor F and the duration of the exposure to the fresh water and / or the rinsing liquor F. The time it takes for the closure 22 to dissolve 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 washing liquor F.

The calibration can therefore always be carried out reliably regardless of the setting of the respective spray zone 18, 19 by a user. This increases the Ro bustness of the operation of the domestic dishwasher 1. The closure 22 can, for example, be introduced into the respective supply line 20, 21 while the hydraulic circuit 17 is being installed. The closure 22 is not destroyed by a valve assigned to the respective spray zone 18, 19 before the first wash cycle. This results in cost savings and simple handling for the user. Furthermore, there is also no need for any additional information 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 waste avoidance.

The calibration takes place without any action on the part of the user during the initial commissioning. This results in a simple operation. Because the calibration is carried out by the user, there is no need to calibrate in the final production. This results in a further cost saving.

3 shows a highly schematic view of a further embodiment of a household dishwasher 1. Only differences from the household dishwasher 1 according to FIGS. 1 and 2 are discussed below. In addition to the rinsing container 2, the domestic dishwasher 1 comprises a base support 23 which carries the rinsing container 2. The base support 23 is, for example, a plastic component, in particular a special plastic injection molded component.

A pump sump 24 is provided on the bottom 7. The pump device 16 is arranged on the pump sump 24. For example, the pumping device 16 can be connected to the pump sump 24 with the aid of a supply line 25. Downstream of the Pum peinrichtung 16, a water switch 26 is provided. The water switch 26 is coupled to the pump device 16 with the aid of a feed line 27, for example.

The domestic dishwasher 1 furthermore comprises a hydraulic circuit 17 as explained above. The hydraulic circuit 17 comprises a spray zone 28 which is designed as a spray arm which is rotatably mounted in the washing container 2. Furthermore, the hydraulic circuit 17 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 multiplicity of spray nozzles for uniformly distributing fresh water and / or washing liquor F in the washing container 2.

For example, the spray zone 28 is assigned to the washware receptacle 12 and the spray zone 29 is assigned to the washware receptacle 13. The spray zone 28 is coupled to the water switch 26 with the aid of a supply line 30. The spray zone 29 is coupled to the water switch 26 with the aid of a feed line 31. With the help of the water switch 26, for example, only the spray zone 28, only the Sprühzo- ne 29 or both spray zones 28, 29 are acted upon with fresh water and / or washing solution F at the same time.

Furthermore, the hydraulic circuit 17 comprises a further spray zone 32, which is designed as a so-called intensive spray zone. The spray zone 32 also comprises a multiplicity of spray nozzles. For example, the spray zone 32 can be attached to the washware receptacle 13. The spray zone 32 is also fluidly coupled to the pump device 16 via the supply line 31. Here, 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 can be coupled to it again. The valve 33 can in particular be actuated manually by a user so that the user can deactivate and activate the spray zone 32. The valve 33 is a switching valve. That is, the valve 33 is either fully open or fully closed. The valve 33 can be an open-close valve.

Upstream of the valve 33, a closure 22, as previously explained, made of a material soluble in water is provided. The closure 22 can be provided on or in a distribution element 34 which is suitable for distributing the fresh water and / or the washing liquor F to the spray zones 29, 32. The closure 22 can, however, also be provided downstream of the valve 33. In the present case, “upstream” means arranged in front of the valve 33, viewed in a direction of flow of the fresh water and / or the washing liquor F. In the present case, “downstream” means arranged after the valve 33, viewed in the direction of flow of the fresh water and / or the rinsing liquor F.

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

This defined hydraulic state can be achieved in that the spray zone 32 is deactivated when the domestic dishwasher 1 is started up or when it is calibrated. This deactivation is effected by the closure 22 guaranteed. The switching position of the valve 33 is irrelevant for the deactivation of the spray zone 32 when the domestic dishwasher 1 is started up. During the calibration, with the aid of an activation of the water switch 26 via the control device 15, calibration can take place during operation of the spray zone 29, the spray zone 28 or both spray zones 28, 29. After completion of the calibration or during the calibration, the shutter 22 dissolves. The operating state of the spray zone 32 can be recognized after the calibration with the aid of a change in the motor current I.

4 shows a schematic block diagram of an embodiment of a method for calibrating the household dishwasher 1 according to FIGS. 1 and 2 and the household dishwasher 1 according to FIG. 3.

In a step S1, part of the hydraulic circuit 17 is decoupled from the pump device 16 during a one-time calibration process of the domestic dishwasher 1 with the aid of the closure 22 made of a water-soluble material. Thereafter or at the same time, the closure 22 in the fresh water and / or the washing liquor F dissolves during and / or after the end of the calibration process.

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

Although the present invention has been described on the basis of exemplary embodiments, it can be modified in many ways. Reference symbols used:

1 household dishwasher

2 rinsing containers

3 door

4 wash cabinet

5 swivel axis

6 loading opening

7 floor

8 ceiling

9 rear wall

10 side wall

11 side wall

12 Washware holder

13 Washware holder

14 Washware holder

15 Control device

16 pumping device

17 hydraulic circuit

18 spray zone

19 spray zone

20 supply line

21 supply line

22 clasp

23 base carriers

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 direction of extension

E direction of insertion F fresh water and / or washing solution

I motor current

51 step

52 step

Claims

PATENT CLAIMS

1. Household dishwasher (1) with a washing container (2) for receiving items to be washed, a hydraulic circuit (17) for circulating fresh water and / or washing liquor (F) in the washing container (2), a pumping device (16) for applying of the hydraulic circuit (17) with the fresh water and / or the washing liquor (F), and a closure (22) made of a water-soluble material, which during a one-time calibration process of the household dishwasher (1) part of the hydraulic circuit (17) decoupled from the pumping device (16) and which dissolves in the fresh water and / or the rinsing liquor (F) during and / or after the end of the calibration process.

2. Household dishwasher according to claim 1, characterized in that the hydraulic circuit (17) has several spray zones (18, 19, 28, 29, 32), the closure (22) at least one of the spray zones (19, 32) from the Pump device (16) decouples.

3. Household dishwasher according to claim 2, characterized in that the at least one with the help of the closure (22) from the pump device (16) coupled abge spray zone (32) with the help of a valve (33) from an activated state in egg NEN deactivated State is dispensable.

4. Household dishwasher according to claim 3, characterized in that the closure (22) is arranged upstream of the valve (33).

5. Household dishwasher according to one of claims 2-4, characterized in that the at least one spray zone (32) decoupled from the pump device (16) by means of the closure (22) is an intensive spray zone.

6. Household dishwasher according to one of claims 2-5, characterized in that the at least one with the aid of the closure (22) of the Pumpeinrich device (16) decoupled spray zone (32) and a further spray zone (29) with the aid of a common supply line (31) are connected to the pumping device (16).

7. Household dishwasher according to claim 6, characterized in that the closure (22) is arranged between the spray zone (32), which is decoupled from the pump device (16) with the aid of the closure (22), and the supply line (31).

8. Household dishwasher according to one of claims 2-7, further comprising a downstream of the pumping device (16) arranged water switch (26) for activating and deactivating the spray zones (18, 19, 28, 29, 32).

9. Household dishwasher according to one of claims 1-8, further comprising a control device (15) for detecting a motor current (I) of the pumping device (16) during the calibration process.

10. Household dishwasher according to one of claims 1 - 9, characterized in that the closure (22) is made of a water-soluble plastic material, in particular special polyvinyl alcohol.

11. A method for calibrating a household dishwasher (1) with a washing container (2) for receiving items to be washed, a hydraulic circuit (17) for circulating fresh water and / or washing liquor (F) in the washing container (2), and a pump direction (16) for loading the hydraulic circuit (17) with the fresh water and / or the rinsing liquor (F), the method comprising the following steps: a) uncoupling (S1) part of the hydraulic circuit (17) from the pumping device (16) during a one-time calibration process of the household dishwasher (1) with the aid of a closure (22) made of a water-soluble material, and b) dissolving (S2) the closure (22) during and / or after the end of the calibration process in the fresh water and / or the rinsing solution (F).

12. The method according to claim 11, characterized in that in step b) the closure (22) 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) dissolves.

13. The method according to claim 11 or 12, characterized in that in step a) at least one spray zone (19, 32) of several spray zones (18, 19, 28, 29, 32) of the hydraulic circuit (17) with the aid of the closure ( 22) is decoupled from the pumping device (16).

14. The method according to any one of claims 11-13, characterized in that in the

Step a) the closure (22) is arranged in or on a feed line (21, 31) of the at least one spray zone (19, 32) decoupled from the pumping device (16) with the aid of the closure (22).

15. The method according to any one of claims 11-14, characterized in that a motor current (I) of the pumping device (16) is detected during the calibration process with the aid of a control device (15).