Domestic dishwasher

Abstract

The invention relates to a domestic dishwasher (1) comprising a dishwashing container (2); a washware receiving area (4) which can be at least partly moved into and out of the dishwashing container (2); an electric motor (16) which has at least one motor parameter (I), wherein the electric motor (16) moves the washware receiving area (12, 13, 14) into the dishwashing container (2) or at least partly out of same in a driving state and is decoupled from the washware receiving area (12, 13, 14) and / or is switched to a powerless mode in a free running state, and / or a control unit (18) which is designed to control the electric motor (16) at least in the driving state on the basis of at least one control parameter (s); a detection unit (19) which is designed to detect a blockage of the washware receiving area (12, 13, 14) and / or a stop request of a user on the basis of the at least one control parameter (s) and / or a motor parameter (I); and a switch unit (20) which is designed to switch the electric motor (16) to the free running state on the basis of the detected blockage or the detected stop request.

Description

[0001] household dishwasher

[0002] The present invention relates to a household dishwasher.

[0003] The operation of household dishwashers (hereinafter also referred to as "dishwashers") is increasingly being simplified. One aspect of this is that a drive moves a dishware holder, such as an upper or lower basket, out of the dishwasher's wash tub for loading and unloading. During the removal or retraction process, a blockage may occur due to dishes, or a user may want to stop the moving dishware holder.

[0004] The document DE 102005 010616 A1 discloses a household dishwasher with a drive configured to automatically move a dishware holder out of and into the washing tub. A user can also move the washing tub manually if a switching element decouples the drive from the washing tub.

[0005] The publications WO 2018 / 120924 A1 and WO 2020 / 124970 A1 disclose a household dishwasher with a powered dish rack attached to a drive via a magnetic device. A user can stop the powered dish rack and move it manually.

[0006] US 2008 / 0315739 A1 discloses an electrically powered warming drawer with a drive configured to move the warming drawer out of and into a cabinet. A user can also move the warming drawer out of the cabinet.

[0007] Against this background, it is an object of the present invention to provide an improved household dishwasher.

[0008] Accordingly, a household dishwasher is provided with a washing compartment and a dishware receptacle that can be displaced into and at least partially out of the washing compartment. The household dishwasher further comprises an electric motor that has at least one motor parameter, wherein the electric motor, in a driving state, displaces the dishware receptacle into or at least partially out of the washing compartment and, in a free-running state, is decoupled from the dishware receptacle and / or de-energized, and / or a control unit that controls the electric motor, at least in the driving state, depending on at least one control parameter.The household dishwasher further comprises a detection unit which is configured to detect a blockage of the dishware holder and / or a user's request to stop as a function of the at least one control parameter and / or a motor parameter, and a switching unit which is configured to switch the electric motor to the free-running state as a function of the detected blockage or the detected request to stop.

[0009] One idea of ​​the present invention is to detect a blockage of the dishware holder using a control parameter and / or a motor parameter. This increases the safety of the powered dishware holder, reducing the risk of potential injury to the user and protecting the dishes in the dishware holder from damage.

[0010] Furthermore, a user's request to pause the dishwashing feed can be easily recognized. This makes it easier for the user to operate the dishwashing feed.

[0011] In this context, a "user stop request" is understood to mean the user's desire to stop the dishware holder. This request is expressed, in particular, by the user exerting force on the dishware holder, such as a force exerted by the user on the dishware holder. In particular, the user can cause the force on the dishware holder directly or indirectly. A direct force means that the user acts directly on the dishware holder with their hand or another body part. An indirect force means that one or more other components of the household dishwasher, such as a door, are connected between the force exerted by the user and the dishware holder. In this context, a "user stop request" is also understood, in a broader sense, to mean the user's desire for a change in the movement of the dishware holder.The changed movement of the dishware holder includes, in particular, the characteristics of the movement speed and direction of the dishware holder. Thus, a changed movement speed of the dishware holder can mean an increase or decrease in the movement speed of the dishware holder by the user. Conversely, a changed movement direction of the dishware holder can mean a reversal of the movement direction of the dishware holder by the user. In particular, the user can also directly or indirectly cause the changed use of the dishware holder.

[0012] A blockage of the dishware holder can occur, for example, due to dishes falling over in the dishware holder or due to food residues or dishwashing residues that block a drive of the dishware holder or parts of the drive, such as gears or racks.

[0013] In this case, "control parameters" are understood to mean parameters which are controlled by the control unit, for example in a control loop, such as a position or an extension path of the dishware holder, or which are included in the control system.

[0014] In some embodiments, the control unit is omitted. In this case, the electric motor is controlled by a control unit. Detection of a blockage and / or a stop request occurs solely based on the motor parameters.

[0015] In this case, "motor parameters" are understood to mean parameters for motor control, such as motor current, motor voltage or motor speed.

[0016] A "dishwasher receptacle" in this case is a receptacle, in particular a basket, for holding dishes to be cleaned, such as plates, cups, cutlery, or bowls. In particular, it can be an upper or lower dishwashing receptacle, also known as an upper and lower dish basket, or a cutlery drawer. A "washing container" in this case is a container in which one or more dishwashing receptacles can be accommodated. The washing container has a washing chamber in which the dishes are cleaned and dried. The washing container is preferably cuboid-shaped.

[0017] According to a further embodiment, the detection unit detects the blockage and / or the stop request depending on a comparison of the engine parameter with a threshold value.

[0018] The threshold value advantageously defines a switching condition at which the electric motor is switched to the freewheeling state. This can be determined, for example, by exceeding or falling below the threshold value.

[0019] According to a further embodiment, the threshold value has a value that is fixed or variable over time.

[0020] This advantageously ensures that temporal changes in the motor parameter are taken into account in the threshold value, for example due to an undefined or varying load of the dishware holder.

[0021] According to a further embodiment, the variable value depends on the motor parameter, the control parameter, another parameter or a derivative of one or more of these parameters.

[0022] This advantageously ensures that the threshold can be flexibly adjusted to changing circumstances over time or otherwise. The derivative is, in particular, a temporal derivative.

[0023] According to a further embodiment, the control of the electric motor comprises a comparison of a target value with an actual value, wherein the control parameter is equal to the target value or the actual value, and the detection unit detects the blockage and / or the stop request based on the comparison. By taking the comparison into account, it is possible to detect, in particular, a case in which the actual value no longer approaches the target value or even moves away from it. In this case, the control is obviously disturbed (which regularly pursues the control objective of bringing the actual value closer to the target value), which indicates an external force, for example in the form of a blockage or a stop request. The "comparison" in particular comprises a difference (formation) between the target value and the actual value.

[0024] According to a further embodiment, the target value is a target position and the actual value is an actual position of the dishware holder.

[0025] This advantageously takes into account the position of the dishware holder in the threshold value.

[0026] According to a further embodiment, the further parameter is determined as a function of an actual position of the dishware holder with respect to a reference position thereof.

[0027] According to a further embodiment, the reference position has a value that is fixed or variable over time.

[0028] This advantageously ensures that, for example, the threshold value is increased during a starting phase of the electric motor.

[0029] According to a further embodiment, the variable value of the reference position corresponds to a respective starting position of the dishware holder.

[0030] This has the advantage that, for example, the starting position is taken into account over the entire extension length of the dishware holder.

[0031] According to a further embodiment, one of the respective approach positions is half the extension length. According to a further embodiment, a machine learning unit is provided, which is configured to determine the threshold value based on learning data sets.

[0032] This advantageously allows the threshold to be adapted to the user's behavior. The machine learning unit can, for example, comprise a neural network or a deep learning algorithm.

[0033] According to a further embodiment, in the free-running state, a mechanical coupling element decouples the dishware holder from the electric motor, or the electric motor is de-energized.

[0034] This allows the user to move the dishware holder manually, i.e. with virtually no resistance.

[0035] According to a further embodiment, the dishware holder can be moved into the washing container or at least partially out of it by means of a telescopic pull-out, wherein the electric motor is designed to drive an element of the telescopic pull-out for moving the dishware holder.

[0036] According to a further embodiment, the electric motor is a permanent magnet synchronous motor.

[0037] When a permanent magnet synchronous motor is de-energized, it runs freely. This eliminates the need for a mechanical coupling element.

[0038] According to a second aspect, a method for operating a household dishwasher is proposed. In a first step, a dishware holder is displaced using an electric motor, which has at least one motor parameter and / or is controlled as a function of at least one control parameter. In a second step, a blockage of the dishware holder or a user's request to stop the dishware holder is detected as a function of the motor parameter or the control parameter. In the third step, the electric motor is decoupled from the dishware holder or the electric motor is deactivated as a function of the detected blockage or the detected request to stop the dishware holder.

[0039] The embodiments and features described for the proposed device apply accordingly to the proposed method, and vice versa.

[0040] The units described here, for example, the control unit or detection unit, can be implemented using hardware and / or software. For example, the units can be implemented on a microprocessor including associated memory resources. The microprocessor including memory resources can, for example, be implemented on a central control unit of the household dishwasher.

[0041] Further possible implementations of the invention also include combinations of features or embodiments described above or below with respect to the exemplary embodiments not explicitly mentioned. In this case, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the invention.

[0042] Further advantageous embodiments and aspects of the invention are the subject of the dependent claims and the exemplary embodiments of the invention described below. The invention will be explained in more detail below using preferred embodiments with reference to the accompanying figures.

[0043] It shows

[0044] Fig. 1 is a schematic perspective view of an embodiment of a household dishwasher;

[0045] Fig. 2 is a schematic side view of the household dishwasher;

[0046] Fig. 3 shows an example of a time course of a motor current under an external force;

[0047] Fig. 4 shows a time profile of a motor current when the threshold value is exceeded due to the force effect from Fig. 3;

[0048] Fig. 5 shows a time profile of a motor current with a time-varying threshold value; Fig. 6 shows a schematic representation of a position control loop;

[0049] Fig. 7 shows a time course of a motor current when starting up a dishware holder with the time-varying threshold value;

[0050] Fig. 8 shows a time profile of a motor current when the threshold value from Fig. 7 is exceeded; and

[0051] Fig. 9 Steps of a method for operating a household dishwasher.

[0052] In the figures, identical or functionally equivalent elements have been given the same reference numerals unless otherwise stated.

[0053] 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, 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-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.

[0054] The door 3 is shown in its open position in Fig. 1. 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, for example, from a stainless steel sheet. Alternatively, the base 7 can be made, for example, from a plastic material.

[0055] The household dishwasher 1 further comprises at least one dishware receptacle 12 to 14. Preferably, several, for example three, dishware receptacles 12 to 14 can be provided, wherein the dishware receptacle 12 can be a lower dishware receptacle or a lower basket, the dishware receptacle 13 can be an upper dishware receptacle or an upper basket, and the dishware receptacle 14 can be a cutlery drawer. As Fig. 1 further shows, the dishware receptacles 12 to 14 are arranged one above the other in the washing compartment 2. Each dishware receptacle 12 to 14 can be selectively moved into or out of the washing compartment 2. In particular, each dishware receptacle 12 to 14 can be pushed or moved into the washing compartment 2 in an insertion direction E (arrow) and pulled or moved out of the washing compartment 2 in an extension direction A (arrow) opposite to the insertion direction E (arrow).

[0056] Fig. 2 shows the household dishwasher 1 in a schematic side view. The dishwasher 1 has a telescopic pull-out 15 to which the dishware holder 13 is attached. The dishwasher 1 further comprises an electric motor 16 to drive an element 17, for example a rail, of the telescopic pull-out 15. When the electric motor 16 is in the driving state, the dishware holder 13 is moved out of the washing tub 2 and into it. The electric motor 16 is operatively connected to the dishware holder 13. For the operative connection, a combination of gears (not shown) and racks (not shown), for example, is provided. The gears and racks mesh with one another and can be arranged, for example, on the dishware holder 13 and / or on the telescopic pull-out 15.

[0057] As further illustrated in Fig. 2, the dishwasher 1 has a control unit 18 (optional) which controls the electric motor 16 depending on at least one control parameter. The control parameter can be, for example, a position of the dishware holder 13. The dishwasher 1 further comprises a detection unit 19 for detecting a blockage of the dishware holder 13 or a user's request to stop. Detection takes place depending on the control parameter or a motor parameter. Detection can also take place depending on the control parameter and the motor parameter. The motor parameter is, for example, a motor current I, a motor voltage, a motor temperature, or a motor torque. The control parameter can, in particular, be an extension path of the dishware holder 13. Furthermore, the detection unit 19 can comprise a sensor (not shown) for detecting the motor parameter.Furthermore, the dishwasher 1 has a switching unit 20, which switches the electric motor 16 to a free-running state when the detection unit 19 detects that the dishware holder 13 is blocked or the user's request to stop. The control unit 18, the detection unit 19, and the switching unit 20 are implemented, for example, as hardware and / or software on a central control unit (not shown) of the dishwasher 1. This can be the same control unit that is also responsible for selecting and executing a respective dishwashing program.

[0058] In the free-running state of the electric motor 16, it is not operatively connected to the dishware holder 13 for extending and retracting it. In the free-running state, the dishware holder 13 can be freely moved manually by the user in the retraction direction E (arrow) and extension direction A (arrow). A coupling element (not shown), such as a switchable freewheel, can be arranged between the electric motor 16 and the dishware holder 13, for example. The coupling element couples the electric motor 16 to the dishware holder 13 for moving it. Upon detection of a blockage or a stop request, the switching unit 20 decouples the coupling element from the electric motor 16, so that the dishware holder 13 can be freely moved.The free-running state of the electric motor 16 can also be achieved by de-energizing the electric motor 16 by the switching unit 20. For this purpose, the electric motor 16 can advantageously be designed as a permanent magnet synchronous motor. The de-energizing can be accomplished, for example, via a relay (not shown).

[0059] Embodiments of how the blockage and the user's desire to stop are determined by the detection unit 19 are described below.

[0060] The user's desire to stop is expressed, for example, by a force 21 (arrow) that the user applies to the dishware holder 13 when it is extended or retracted. The force 21 (arrow) can also act on the dishware holder 13 as a result of a blockage.

[0061] The following describes the case when the dishware holder 13 is extended.

[0062] If the dishware holder 13 is extended in the extension direction A (arrow) and becomes blocked, or if the user wishes to stop the dishware holder 13, the external force 21 (arrow) acts on the dishware holder 13 in the opposite direction to the extension direction A (arrow). In order for the dishware holder 13 to continue its movement in the extension direction A (arrow), the electric motor 16 must provide an additional force 22 (arrow) to overcome the external force 21 (arrow). To provide the force 22 (arrow), the electric motor 16 must generate a higher torque, which is achieved by increasing the motor current I of the electric motor 16.

[0063] Fig. 3 shows a time curve of a motor current I before and during a sustained application of an external force 21 (arrow; hereinafter also "external force 21"). The motor current I before the external force 21 is denoted by I1, while the motor current I after the external force 21 (arrow) is denoted by I2. The time at which the external force 21 begins (arrow) is denoted by t1. The motor current I increases linearly from I1 to I2, but can also increase exponentially, for example. The increase in the motor current I3 occurs until time t2, at which point the motor current I reaches the value I2 required to overcome the external force 21 (arrow). The time difference between time t2 and the beginning of the force 21 (arrow) is denoted by t3.

[0064] As can also be seen in Fig. 3, the motor current I can also vary dynamically within a current interval I4 and not along a fixed curve of the motor current I1 and I2. This can be the case, for example, due to an undetermined or unknown load of the washware holder 13 or dynamic behavior during the movement of the washware holder 13, such as during a start-up phase, as will be explained in more detail later. The lower limit of the motor current curve I within the current interval I4 is designated I5, while the upper limit of the motor current curve I within the current interval I4 is designated I6.

[0065] Fig. 4 shows a temporal progression of motor current I and an increase in motor current I3 due to the force 21 (arrow). To prevent injury to the user or damage to the dishware holder 13 or to the dishes (not shown), a fixed threshold 23 is defined, for example, stored in a memory (not shown) of the dishwasher 1. The detection unit 19 (Fig. 2) compares the motor current I with the threshold 23. If the motor current I exceeds the threshold 23, the detection unit 19 detects the blockage or the stop request.

[0066] In a further embodiment, the threshold value 23 can be adjusted, for example, to the load status of the dishware holder 13. If the weight of the dishware holder 13 is increased, a higher motor current I3' is required to move the dishware holder 13. To prevent the detection unit 19 from falsely detecting a blockage, the threshold value 23 is advantageously increased.

[0067] In a further embodiment, the threshold value 23 may have a value that varies over time, as shown in Fig. 5. Due to an excessively rapid increase in the motor current I3" during the time difference t3, the threshold value 23 may be reduced. The reason for this is that a user's request to stop or a blockage is associated with a very jerky and thus rapid increase in the motor current I3.

[0068] Fig. 5 further shows a motor current curve I with a smaller increase I3'" and an increased threshold value 23, so that an increased motor current I2' is tolerated by the detection unit 19. One reason for this can be, for example, the starting of the electric motor 16 and a related increased current consumption. In order to take the increase in the motor current I3 into account in the threshold value 23, the threshold value 23 is defined, for example, as a function of a time derivative of the motor current I.

[0069] In a further exemplary embodiment, a control of the electric motor 16 comprises a position control loop 24, which is illustrated in Fig. 6. The control compares a target value SW with an actual value IW. The control parameter - here the actual value DW - is controlled by the control in such a way as to minimize a difference DW between the target value SW and the actual value IW. The target value SW can, for example, be a target position of the wash ware holder 13. The actual value IW can, for example, be an actual position s of the wash ware holder 13. The position control loop from Fig. 6 comprises the control unit 18 from Fig. 2, which controls the motor current I of the electric motor 16 from Fig. 2. The wash ware holder 13 is then moved out of the washing tub 2 and, in doing so, covers an extension distance s. A position of the wash ware holder 13 is determined, for example, via the extension distance s.The position of the dishware holder 13 is returned as the actual position IW or s to the position control circuit 24, where it is compared with the target value SW.

[0070] Due to the external force 21 (arrow) in Fig. 2, the difference DW between the target position SW and an actual position IW cannot be minimized by the position control loop 24 and actually increases. In order for the detection unit 19 to detect a blockage or a stop request, the threshold value 23 can be defined, for example, as a function of the difference DW.

[0071] Fig. 7 shows a time profile of a motor current I during start-up of the dishware holder 13. The start-up phase s3 is described by a start-up position s1 as the start and end start-up position s2. During start-up s3 of the dishware holder 13, the motor current I is increased. In order to avoid detecting a false blockage and to keep the external force 21 (arrow) constant over an entire extension length 25 (Fig. 2) of the dishware holder 13, the threshold value 23 depends both on the motor current I and on a reference position of the dishware holder 13. The reference position has a value that is fixed or variable over time. The reference position can be a position of the dishware holder 13 over the entire extension length 25, for example the start-up position s1, such as halfway along the extension length.

[0072] As shown in Fig. 7, the motor current I is limited by the threshold value 23. The threshold value 23 depends on the motor current I and the position of the dishware holder 13, whereby the position is determined via the extension distance s of the dishware holder 13 and has a curve similar to the curve of the motor current I. The difference between the threshold value 23 and the motor current I remains constant. This difference corresponds to an additional motor current required to overcome the external force 21 (arrow).

[0073] Fig. 8 shows the time profile of a motor current I from Fig. 7 when the threshold value 23 from Fig. 7 is exceeded in the start-up phase s3 of the dishware holder. This also makes it possible to detect the blockage and the start-up request during the start-up phase s3. Fig. 9 shows steps of a method for operating a household dishwasher. In a first step S1, the dishware holder 13 is moved with the aid of the electric motor 16. The electric motor 16 has at least one motor parameter I and is controlled as a function of at least one control parameter s. In a second step S2, the blockage of the dishware holder 13 or the user's stop request is controlled as a function of the motor parameter I or the control parameter s. In a third step S3, the electric motor 16 is decoupled from the dishware holder 13 or switched off as a function of the detected blockage or the detected stop request.

[0074] In a further embodiment, the dishwasher 1 has a machine learning unit (not shown) for determining the threshold value 23 based on learning data sets. The threshold value 23 can, for example, be defined once or continuously with new data sets.

[0075] Although the present invention has been described using exemplary embodiments, it can be modified in many ways.

[0076] Reference symbols used

[0077] 1 household dishwasher

[0078] 2 rinsing containers

[0079] 3 Door

[0080] 4 rinsing chamber

[0081] 5 swivel axis

[0082] 6 Loading opening

[0083] 7 Floor

[0084] 8 Ceiling

[0085] 9 Rear wall

[0086] 10 Side wall

[0087] 11 Side wall

[0088] 12 Dishwasher waste holder

[0089] 13 Dishwasher drawer

[0090] 14 Dishwasher waste holder

[0091] 15 Telescopic extension

[0092] 16 electric motor

[0093] 17 elements

[0094] 18 Control unit

[0095] 19 Detection unit

[0096] 20 switching unit

[0097] 21 Force (arrow)

[0098] 22 Force (arrow)

[0099] 23 Threshold

[0100] 24 control loop

[0101] 25 extension length

[0102] A Extension direction (arrow

[0103] DW difference

[0104] E Insertion direction (arrow)

[0105] I Motor current - I6 Motor current

[0106] IW actual value; actual position S1 first step

[0107] S2 Second step

[0108] S3 Third step

[0109] SW Target value; Target position s Extension path; Actual position s1 Position s2 Position s3 Start-up phase t Time t1 Time t2 Time t3 Time

Claims

Claims: Household dishwasher (1) comprising a wash tub (2), a dishware holder (4) which is movable into and at least partially out of the wash tub (2), an electric motor (16) which has at least one motor parameter (I), wherein the electric motor (16) in a driving state moves the dishware holder (12, 13, 14) into or at least partially out of the wash tub (2) and in a free-running state is decoupled from the dishware holder (12, 13, 14) and / or is switched to power-free mode, and / or a control unit (18) which is configured to control the electric motor (16) at least in the driving state as a function of at least one control parameter (s), a detection unit (19) which is configured to detect a blockage of the dishware holder (12, 13, 14).14) and / or a user's request to stop, depending on at least one control parameter (s) and / or a motor parameter (I), and a switching unit (20) configured to switch the electric motor (16) to the free-running state depending on the detected blockage or the detected request to stop. Household dishwasher (1) according to claim 1, characterized in that the detection unit (19) detects the blockage and / or the request to stop depending on a comparison (DW) of the motor parameter (I) with a threshold value (23). Household dishwasher (1) according to claim 2, characterized in that the threshold value (23) has a fixed or variable value over time. Household dishwasher (1) according to claim 3, characterized in that the variable value depends on the motor parameter (I), the control parameter (s),a further parameter or a derivative of one or more of these parameters (s, I).

5. Household dishwasher (1) according to one of the preceding claims, characterized in that the control of the electric motor (16) comprises a comparison (DW) of a setpoint value (SW) with an actual value (IW), wherein the control parameter (s) is equal to the setpoint value (SW) or the actual value (IW) and the detection unit (19) detects the blockage and / or the request to stop depending on the comparison (DW).

6. Household dishwasher (1) according to claim 5, characterized in that the target value (SW) is a target position and the actual value (IW) is an actual position of the dishware intake (12, 13, 14).

7. Household dishwasher (1) according to one of claims 4 to 6, characterized in that the further parameter is determined as a function of an actual position (IW) of the dishwashing tray (12, 13, 14) with respect to a reference position of the same.

8. Household dishwasher (1) according to claim 7, characterized in that the reference position has a fixed or variable value over time.

9. Household dishwasher (1) according to claim 8, characterized in that the variable value of the reference position corresponds to a respective approach position (s1) of the dishware intake (12, 13, 14).

10. Household dishwasher (1) according to claim 9, characterized in that one of the respective approach positions (s1) is half an extension length (25).

11. Household dishwasher (1) according to one of claims 2 to 10, characterized by a machine learning unit which is configured to determine the threshold (23) depending on learning data sets.

12. Household dishwasher (1) according to one of the preceding claims, characterized in that a mechanical [component] is present in the free-running state. Coupling element decouples the dishware intake (12, 13, 14) from the electric motor (16) or the electric motor (16) is de-energized.

13. Household dishwasher (1) according to one of the preceding claims, characterized in that the dishware intake (12, 13, 14) can be moved into or at least partially out of the wash container (2) by means of a telescopic extension (15), wherein the electric motor (16) is arranged to drive an element (17) of the telescopic extension (15) for moving the dishware intake (12, 13, 14).

14. Household dishwasher (1) according to one of the preceding claims, characterized in that the electric motor (16) is a permanent magnet synchronous motor.

15. Method for operating a household dishwasher (1), comprising the following steps: a) moving (S1) a dishware holder (12, 13, 14) using an electric motor (16) which has at least one motor parameter (I) and / or is controlled depending on at least one control parameter (s); b) detecting (S2) a blockage of the dishware holder (12, 13, 14) or a user's request to stop depending on the motor parameter (I) or the control parameter (s); and c) decoupling (S3) the electric motor (16) from the dishware holder (12, 13, 14) or disengaging the electric motor (16) depending on the detected blockage or the detected request to stop.

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