Lifting device, method for operating a lifting device, and dish washing machine

Abstract

A lifting device for a dishwashing machine includes an electrical drive mechanism constructed to move a dishware receptacle of the dishwashing machine between a start position and an end position. A detection unit detects a current draw of the electrical drive mechanism over a travel distance of the dishware receptacle in the dishwashing machine, and an identification unit identifies a status of the lifting device on the basis of the current draw of the electrical drive mechanism detected over the travel distance.

Claims

1. A lifting device for a dishwashing machine, comprising: an electrical drive mechanism constructed to move a dishware receptacle of the dishwashing machine between a start position and an end position; a detection unit configured to detect a current draw of the electrical drive mechanism over a travel distance of the dishware receptacle in the dishwashing machine; and an identification unit configured to identify a status of the lifting device on the basis of the current draw of the electrical drive mechanism detected over the travel distance.

2. The lifting device of claim 1, constructed for a domestic dishwashing machine.

3. The lifting device of claim 1, wherein the identification unit is configured to identify on the basis of the current draw of the drive mechanism detected over the travel distance, a position of the dishware receptacle in a washing container of the dishwashing machine, a fault condition of the lifting device and/or a present weight of a load accommodated in the dishware receptacle.

4. The lifting device of claim 1, wherein the identification unit is configured to identify a fault condition of the lifting device on the basis of a derivative of the detected current draw with respect to the travel distance.

5. The lifting device of claim 1, wherein the identification unit is configured to identify the status of the lifting device on the basis of a comparison of the current draw detected over the travel distance with at least one reference curve for the current draw of the electrical drive mechanism.

6. The lifting device of claim 1, further comprising a memory unit configured to store a multiplicity of different reference curves for the current draw of the electrical drive mechanism, which reference curves are weight-specific for a load of the dishware receptacle, said identification unit being configured to identify a present weight of the load accommodated in the dishware receptacle by comparing the detected current draw with the weight-specific reference curves.

7. The lifting device of claim 1, further comprising: a memory unit configured to store a multiplicity of different reference curves for the current draw of the electrical drive mechanism, which reference curves are weight-specific for a load of the dishware receptacle; a weight sensor configured to determine a present weight of the load accommodated in the dishware receptacle; and a selection unit configured to select one of the stored reference curves on the basis of the weight of the load determined by the weight sensor, wherein the identification unit is configured to identify a fault condition of the lifting device by comparing the detected current draw with the selected reference curve.

8. The lifting device of claim 1, further comprising a weight sensor configured to determine a weight of a load accommodated in the dishware receptacle, said identification unit being configured to identify the status of the lifting device on the basis of the detected current draw and the weight determined by the weight sensor.

9. The lifting device of claim 1, further comprising a sensor device configured to detect the travel distance of the dishware receptacle in the dishwashing machine.

10. The lifting device of claim 1, further comprising a memory unit configured to store a minimum reference curve for a minimum current draw of the electrical drive mechanism and a maximum reference curve for a maximum current draw of the electrical drive mechanism, said identification unit being configured to ascertain a fault condition of the lifting device when the detected current draw is less than the stored minimum reference curve or greater than the stored maximum reference curve.

11. The lifting device of claim 1, further comprising a controller configured to control the electrical drive mechanism for raising or lowering the dishware receptacle according to the identified status of the lifting device.

12. The lifting device of claim 11, wherein the identification unit is integrated in the controller.

13. The lifting device of claim 1, wherein the electrical drive mechanism includes a servomotor.

14. The lifting device of claim 9, wherein the dishware receptacle of the dishwashing machine is a bottom dishware receptacle in spaced-apart relation to a top dishware receptacle of the dishwashing machine, said electrical drive mechanism being configured to move the bottom dishware receptacle of the dishwashing machine between the start position and the end position, said sensor device being configured to detect the travel distance of the bottom dishware receptacle in the dishwashing machine, said detection unit being configured to detect the current draw of the electrical drive mechanism over the travel distance of the bottom dishware receptacle, said identification unit being configured to identify the status of the lifting device on the basis of the current draw of the electrical drive mechanism detected over the travel distance of the bottom dishware receptacle.

15. A dishwashing machine, comprising: a washing container; a dishware receptacle configured for arrangement in the washing container; and a lifting device comprising an electrical drive mechanism constructed to move the dishware receptacle between a start position and an end position, a detection unit configured to detect a current draw of the electrical drive mechanism over a travel distance of the dishware receptacle in the washing container, and an identification unit configured to identify a status of the lifting device on the basis of the current draw of the electrical drive mechanism detected over the travel distance.

16. The dishwashing machine of claim 15, constructed in the form of a domestic dishwashing machine.

17. A method for operating a lifting device for a dishwashing machine, comprising: detecting a travel distance of a dishware receptacle in the dishwashing machine as the dishware receptacle is moved by an electrical drive mechanism of the lifting device between a start position and an end position; detecting a current draw of the electrical drive mechanism over the travel distance; and identifying a status of the lifting device on the basis of the current draw of the electrical drive mechanism detected over the travel distance.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantageous embodiments and aspects of the invention form the subject matter of the dependent claims and of the exemplary embodiments of the invention that are described below. The invention is described in greater detail below using preferred embodiments with reference to the accompanying figures.

(2) FIG. 1 is a schematic sectional view of an embodiment of a dishwashing machine;

(3) FIG. 2 is another schematic sectional view of the dishwashing machine shown in FIG. 1;

(4) FIG. 3 is a schematic partial sectional view of the dishwashing machine shown in FIG. 1;

(5) FIG. 4 shows a diagram for illustrating the travel-dependent current draw of the electrical drive mechanism of the lifting device of FIG. 1;

(6) FIG. 5 shows a diagram for illustrating the travel-dependent current draw of the electrical drive mechanism of the lifting device in the event of a fault condition;

(7) FIG. 6 shows a diagram for illustrating different weight-specific reference curves for the current draw of the electrical drive mechanism;

(8) FIG. 7 shows a diagram for illustrating an example of the travel-dependent current draw of the electrical drive mechanism of the lifting device, and also a minimum reference curve for a minimum current draw of the electrical drive mechanism and a maximum reference curve for a maximum current draw of the electrical drive mechanism; and

(9) FIG. 8 shows an exemplary embodiment of a method for operating a lifting device for a dishwashing machine.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS OF THE PRESENT INVENTION

(10) In the figures, elements that are identical or have the same function are denoted by the same reference signs unless otherwise stated.

(11) FIGS. 1 and 2 each show a schematic sectional view of an embodiment of a dishwashing machine 1. The dishwashing machine 1 is preferably a domestic dishwashing machine. The dishwashing machine 1 has a washing container 2, which can be closed by a door 3, in particular in a watertight manner. A sealing means can be provided for this purpose between the door 3 and the washing container 2. The washing container 2 and the door 3 can form a washing chamber 4 of the dishwashing machine 1 for washing dishware. FIGS. 1 and 2 show the door 3 in its open position. The door 3 can be closed or opened by pivoting about a pivot axis provided on the bottom end of the door 3.

(12) The washing container 2 has a floor 5, a ceiling 6 arranged opposite the floor 5, and a rear wall 7 arranged opposite the door 3. The washing container 2 also has two side walls 8, 9 arranged opposite each other. FIGS. 1 and 2 show only a portion of the side wall 9. The washing container 2 is preferably cuboid in shape. The washing container 2 is preferably made from a metal material, in particular from a sheet metal. For instance, the washing container 2 can be made from a stainless steel sheet. It is also possible for the floor 5 to be made from a plastics material.

(13) The dishwashing machine 1 has a bottom basket or a bottom dishware receptacle 10. The dishwashing machine 1 also has a top basket or a top dishware receptacle 11. The dishware receptacles 10, 11 are preferably arranged one above the other in the washing container 2. In the orientation shown in FIGS. 1 and 2, the top dishware receptacle 11 is arranged above the bottom dishware receptacle 10. In addition, the dishwashing machine 1 can comprise a cutlery drawer (not shown) above the top dishware receptacle 11. The dishware receptacles 10, 11 are preferably box-shaped. Floors and walls of the dishware receptacles 10, 11 are in the form of mesh. Each dishware receptacle 10, 11 can be moved optionally into the washing container 2 in an insertion direction E or out of said washing container in an extraction direction A opposite to the insertion direction E. A handle 12 can be provided on each of the dishware receptacles 10, 11.

(14) Guidance mechanisms 13 can be used for this to move the dishware receptacles 10, 11 into the washing container 2 or out of said washing container. FIGS. 1 and 2 show only the guidance mechanism 13 of the bottom dishware receptacle 10. Each dishware receptacle 10, 11 is preferably allocated two such guidance mechanisms 13, which are arranged on each side of the dishware receptacles 10, 11. The dishware receptacles 10, 11 can each be mounted in their allocated guidance mechanisms 13. Each guidance mechanism 13 can have a first guide rail 14, a second guide rail 15 and a running rail 16, which is arranged between the first guide rail 14 and the second guide rail 15. The bottom dishware receptacle 10 is preferably attached to the second guide rail 15 and/or mounted therein. The running rail 16 can move relative to the guide rails 14, 15.

(15) The dishwashing machine 1 also comprises a lifting device 17 for the bottom dishware receptacle 10. The lifting device 17 is designed to move the bottom dishware receptacle 10, when it is positioned fully extracted from the washing container 2, from a start position P.sub.A shown in FIG. 1 into an end position P.sub.E shown in FIG. 2. In other words, only in the start position P.sub.A can the bottom dishware receptacle 10 be moved into the washing container 2 or out of the washing container. In particular, the lifting device 17 is designed to raise the bottom dishware receptacle 10 from the start position P.sub.A into the end position P.sub.E, and to lower said dishware receptacle from the end position P.sub.E into the start position P.sub.A.

(16) The lifting device 17 comprises at least a first pivoting arm 18 and a pivoting arm 19, which is spaced apart from the first pivoting arm 18. Each of the pivoting arms 18, 19 is pivotably attached by a bearing 20, 21 respectively to one of the side walls 8, 9 of the washing container 2. In particular, the bearings 20, 21 are fixed bearings. The bearing 20 is preferably arranged here at the same height as the bearing 21 in the vertical direction. The pivoting arms 18, 19 are also pivotably attached by bearings 22, 23 to the guidance mechanism 13 of the bottom dishware receptacle 10 and in particular to the first guide rail 14. In FIG. 1, the pivoting arms 18, 19 are positioned vertically. In other words, in the start position P.sub.A of the bottom dishware receptacle 10, the pivoting arms 18, 19 are in a vertical arrangement.

(17) The lifting device 17 also comprises an electrical drive mechanism 24 shown in FIG. 3 and a controller 25, which can be connected to the drive mechanism 24 via a control line 26. The drive mechanism 24 comprises a servomotor or is embodied as a servomotor. A power supply to the drive mechanism 24 can also be provided via the control line 26. The drive mechanism 24 and/or the controller 25 are arranged in, or on, a side wall 27 of a housing 28 of the dishwashing machine 1. As FIG. 3 shows, the drive mechanism 24 and the controller 25 are positioned between the side wall 8 of the washing container 2 and the side wall 27 of the housing 28 of the dishwashing machine 1. The controller 25 can also be integrated in the drive mechanism 24. This results in a particularly compact design of the lifting device 17.

(18) The drive mechanism 24 comprises a drive shaft 29, which passes through the side wall 8 of the washing container 2 into the washing chamber 4. A suitable sealing mechanism can be provided between the drive shaft 29 and the side wall 8. The drive shaft 29 is preferably connected to the bearing 20 of the first pivoting arm 18 for conjoint rotation with said arm, so that the drive mechanism 24 can apply a torque to the first pivoting arm 18. Alternatively or additionally, such a drive mechanism 24 can also be provided for the second pivoting arm 19. Such drive mechanisms 24 can be provided on both side walls 8, 9 of the washing container 2. The drive mechanism 24 is designed to raise from the start position P.sub.A into the end position P.sub.E, or to lower from the end position P.sub.E into the start position P.sub.A, the bottom dishware receptacle 10 without a manual assist force.

(19) Returning now to FIGS. 1 and 2, the lifting device 17 also comprises a control lever or drag lever 30. Said drag lever 30 is preferably provided on each side of the bottom dishware receptacle 10. The drag lever 30 is rotatably mounted by a bearing 31 on the washing container 2, and in particular one drag lever on each of the side walls 8, 9. Said bearing 31 is arranged below the bearings 20, 21 of the pivot arms 18, 19 in the vertical direction. In addition, the drag lever 30 is mounted by a bearing 32 on the bottom dishware receptacle 10. The drag lever 30 can be designed to lock the bottom dishware receptacle 10 during raising or lowering such that it cannot be moved into the washing container 2 or out of the washing container. The drag lever 30 can comprise a catch or locking mechanism for this purpose. In particular, the drag lever 30 can be designed to lock the bearing 32 of the drag lever 30, which bearing is provided on the bottom dishware receptacle 10, during raising and lowering of the bottom dishware receptacle 10, so that the bearing 32 can pivot, but not move linearly, relative to the bottom dishware receptacle 10. In other words, during raising or lowering of the bottom dishware receptacle 10, the bearing 32 is able only to pivot relative to the bottom dishware receptacle 10. Only in the start position P.sub.A is the bearing 32 released so that the bottom dishware receptacle 10 can move linearly relative to the bearing 32. The drag lever 30 is optional.

(20) The lifting device 17 also comprises a catch or locking mechanism 35, which is designed to lock the top dishware receptacle 11 during raising or lowering of the bottom dishware receptacle 10 such that the top dishware receptacle 11 is fixed in the washing container 2 in a linearly immovable manner so that it can now be moved only slightly in the extraction direction A and in the insertion direction E for the purpose of operating the lifting device 17. In particular, the locking mechanism 35 is designed to release the top dishware receptacle 11 only when the bottom dishware receptacle 10 is located in the start position P.sub.A. The locking mechanism 35 can comprise a locking element 36. The locking mechanism 35 is designed to lock the top dishware receptacle 11 electromechanically in the washing container 2. For instance, the locking mechanism 35 can have a solenoid, which is designed to displace the locking element 36, which may be a pin for example, in order to engage the locking element interlockingly with a mating segment provided on the rear wall 7 of the washing container 2. The locking element 36 may also be an electromagnet, which is designed to connect the locking mechanism 35 securely to the rear wall 7.

(21) The lifting device 17 also comprises a spring mechanism 37, which connects the locking mechanism 35 to the top dishware receptacle 11. The spring mechanism 37 may be a cylinder spring, for example. The spring mechanism 37 is arranged between the rear wall 34 of the top dishware receptacle and a rear wall 38 of the locking mechanism 35. For instance, the spring mechanism 37 can be fixed to the rear walls 34, 38.

(22) FIGS. 1 to 7, to which reference is made, are used below to explain how the lifting device 17 works. To move the bottom dishware receptacle 10 from the start position P.sub.A into the end position P.sub.E, the bottom dishware receptacle 10 is first moved out fully from the washing container 2 so that the bottom dishware receptacle 10 is in the start position P.sub.A. Suitable sensors can be used to identify whether the bottom dishware receptacle 10 is moved out fully from the washing container 2. The controller 25 is then designed to control the drive mechanism 24 to raise or lower the bottom dishware receptacle 10 during manual movement of the top dishware receptacle 11 in the washing container 2.

(23) Initially, a first manual actuating force F.sub.1, in particular a pushing force, is applied to the top dishware receptacle 11 inserted in the washing container 2. The actuating force F.sub.1 acts towards the rear wall 7. In this phase, the locking mechanism 35 is still spaced away from the rear wall 7 of the washing container 2, and the top dishware receptacle 11 is not yet locked in the washing container 2. The locking mechanism 35 is not locked. By applying the actuating force F.sub.1, the top dishware receptacle 11 is moved further into the washing container 2 until the locking mechanism 35 makes contact with the rear wall 7. The locking mechanism 35 is still not locked yet.

(24) A further inwards movement of the top dishware receptacle 11 into the washing container 2 compresses the spring mechanism 37. During this process, the actuating force F.sub.1 acts against a spring force of the spring mechanism 37. The locking mechanism 35 is actuated as soon as a travel distance of the top dishware receptacle 11 is less than a lower threshold value, and the locking element 36 connects the locking mechanism 35 to the rear wall 7 of the washing container 2. In addition, as soon as the locking mechanism 35 is locked, the drive mechanism 24 is controlled by the controller 25 to raise the bottom dishware receptacle 10 out of the start position P.sub.A into the end position P.sub.E.

(25) The smaller the travel distance and/or the greater the actuating force F.sub.1, the greater is a speed of movement during raising of the bottom dishware receptacle 10. The condition required for locking of the top dishware receptacle 11 and activation of the drive mechanism 24 is that the bottom dishware receptacle 10 is fully extracted. This is ensured by the previously described sensors. The bottom dishware receptacle 10 stays in its present position as soon as the actuating force F.sub.1 is no longer applied to the top dishware receptacle 11. A locking mechanism, for instance a self-locking worm gear assigned to the drive mechanism 24, can be provided for this purpose for locking the bottom dishware receptacle 10.

(26) If a second manual actuating force F.sub.2, in particular a pulling force, directed away from the rear wall 7, is applied to the locked top dishware receptacle 11, and the travel distance exceeds an upper threshold value, the bottom dishware receptacle 10 is lowered from the end position P.sub.E into the start position P.sub.A. As soon as the bottom dishware receptacle 10 has reached the start position P.sub.A, the locking mechanism 35 is unlocked or released, so that the top dishware receptacle 11 is no longer locked in the washing container 2 and can be moved out of said washing container. While the top dishware receptacle 11 is locked and no actuating force F.sub.1, F.sub.2 is being exerted thereon, then the drive mechanism 24 is deactivated and the bottom dishware receptacle 10 remains in its present position. The drive mechanism 24 can comprise the previously mentioned self-locking worm gear for this purpose.

(27) The lifting device 17 also comprises a sensor device 39 for directly detecting the actuating force F.sub.1, F.sub.2. The sensor device 39 can be provided on the washing container 2, on the top dishware receptacle 11 or on the handle 12 of the top dishware receptacle 11. The sensor device 39 is preferably operatively connected to the handle 12 so that the actuating force F.sub.1, F.sub.2 can be detected as soon as it is applied to the handle 12. The sensor device 33 can be designated the first sensor device 33, and the sensor device 39 can be designated the second sensor device 39.

(28) Unlike conventional solutions, the lifting device 17 has the advantage that a user does not need to bend down to the bottom dishware receptacle 10 in order to operate the lifting device 17. The lifting device 17 can be operated always at the top dishware receptacle 11 irrespective of the position of the bottom dishware receptacle 10. The lifting device 17 is operated in particular using the handle 12 of the top dishware receptacle 11. There is also no need to fit to the dishwashing machine 1 additional buttons or sensor panels for operating the lifting device 17. The fact that the lifting device 17 can be activated to raise or lower the bottom dishware receptacle 10 only when the top dishware receptacle 11 is located fully in the washing container 2 prevents the bottom dishware receptacle 10 from colliding with the top dishware receptacle 11. There is also no need to transfer data and/or energy into the washing chamber 4 of the washing container 2.

(29) The drive mechanism 24 shown in FIG. 3 comprises a detection unit 40, which is designed to detect an instantaneous current draw of the electrical drive mechanism 24 over a travel distance x of the dishware receptacle 10 in the dishwashing machine 1. In this connection, FIG. 4 shows a graph for illustrating the travel-dependent current draw I of the electrical drive mechanism 24 of the lifting device 17.

(30) In addition, the controller 25 comprises an identification unit 41 for identifying at least one status of the lifting device 17 on the basis of the current draw I of the electrical drive mechanism 24 detected over the travel distance x.

(31) Examples of the at least one status that can be identified by the identification unit 41 are the position of the bottom dishware receptacle 10 in the washing container 2, a fault condition of the lifting device 17 and a present weight of a load accommodated in the bottom dishware receptacle 10.

(32) The identification unit 41 is designed, for example, to identify a fault condition of the lifting device 17 on the basis of a first derivative of the detected current draw I with respect to the travel distance x. In this connection, FIG. 5 shows a graph for illustrating the travel-dependent current draw I of the electrical drive mechanism 24 in the event of a fault condition, which is highlighted in detail by the circle 501 in FIG. 5. The gradient of the instantaneous current draw I varies in the region of the circle 501. This variation in the gradient can be identified particularly easily by the first mathematical derivative of the detected current draw I with respect to the travel distance x. In other words, the fault condition is detected by means of the derivative of the motor current of the electrical drive mechanism 24 with respect to the distance x. For example, if during the movement of the bottom dishware receptacle 10, the current I or the current draw I deviates from a reference curve or standard curve, for instance if a child becomes caught on the bottom dishware receptacle, this is detected, and the controller 24 can respond accordingly, for instance by switching off the drive mechanism 24 or reversing the bottom dishware receptacle 10.

(33) The identification unit 41 can also be designed to identify the at least one status of the lifting device 17 on the basis of a comparison of the current draw I detected over the travel distance x with at least one reference curve K1-K5 for the current draw I of the electrical drive mechanism 24. FIGS. 6 and 7 show examples relating to this.

(34) FIG. 6 shows a graph for illustrating different weight-specific reference curves K1, K2 and K3 for the current draw of the electrical drive mechanism 24. In this case, the reference curve K1 is an example of a light load, the reference curve K2 is an example of a moderately heavy load, and the reference curve K3 is an example of a heavy load. The weight-specific reference curves K1-K3 are stored in a memory unit 42, for example, which is integrated in the controller 25, for instance. The identification unit 41 can be designed to identify the present weight of the load accommodated in the bottom dishware receptacle 10 by comparing the actually detected current draw I with the weight-specific reference curves K1-K3. The reference curve K1, K2 or K3 that is currently effective is inferred from the actually detected current draw I. The present weight of the load is then deduced by means of the reference curve K1, K2 or K3 selected in this manner.

(35) In addition, it is also possible to use a weight sensor (not shown). The weight sensor can be designed to determine a present weight of the load accommodated in the bottom dishware receptacle 10. In addition, a selection unit 43 integrated in the controller 25 can be designed to select one of the stored reference curves K1-K3 on the basis of the weight of the load determined by the weight sensor. The identification unit 41 can be designed in this case to identify a fault condition of the lifting device 17 by comparing the actually detected current draw I with the selected reference curve K1, K2 or K3. In this embodiment, the selected reference curve K1, K2 or K3 defines a reference-value characteristic, whereas the actually detected current draw I constitutes an actual-value characteristic. A fault condition of the lifting device 17 can be detected on the basis of a deviation of the actual-value characteristic from the reference-value characteristic.

(36) Furthermore, the information content for detecting a status of the lifting device 17 can be increased by using the weight of the load determined by the weight sensor. In this case, the identification unit 41 can be designed to identify the at least one status of the lifting device 17 on the basis of the detected current draw I and the weight determined by the weight sensor.

(37) In addition, FIG. 7 shows a graph for illustrating an example of the travel-dependent current draw I of the electrical drive mechanism 24, and also a minimum reference curve K4 for a minimum current draw of the electrical drive mechanism 24 and a maximum reference curve K5 for a maximum current draw of the electrical drive mechanism 24. In this case, the identification unit 41 is designed to ascertain a fault condition of the lifting device 17 if the detected current draw is less than the stored minimum reference curve K4 or greater than the stored maximum reference curve K5. In the example of FIG. 7, the actually detected current draw I intersects the maximum reference curve K5 at the travel distance x1 given by way of example. It is hence ascertained that a fault condition exists at the travel distance x1. The controller 25 can respond to this detected fault condition, for example, by using the lifting device 17 to reverse the bottom dishware receptacle 10.

(38) FIG. 8 shows an exemplary embodiment of a method for operating a lifting device 17 for a dishwashing machine 1. An example of such a lifting device is shown in FIGS. 1 and 2. The dishwashing machine 1 is a domestic dishwashing machine, for example, and comprises a dishware receptacle 10. The lifting device 17 comprises an electrical drive mechanism 24, which is designed to move the dishware receptacle 10 between a start position P.sub.A and an end position P.sub.E by means of raising or lowering. The example of the method in FIG. 8 comprises the following steps 801, 802 and 803:

(39) In step 801, a travel distance x of the dishware receptacle 10 in the dishwashing machine 1 is detected.

(40) In step 802, a current draw I of the electrical drive mechanism 24 is detected over the travel distance x.

(41) In step 803, at least one status of the lifting device 17 is identified on the basis of the current draw I of the drive mechanism 24 detected over the travel distance x.

(42) Although the present invention has been described with reference to exemplary embodiments, it can be modified in numerous different ways. For instance, FIGS. 1 and 2 show a dishwashing machine 1 having a bottom dishware receptacle 10 and a top dishware receptacle 11. The lifting device 17 can also be used for a dishwashing machine having just one dishware receptacle.

LIST OF REFERENCES USED

(43) 1 dishwashing machine 2 washing container 3 door 4 washing chamber 5 floor 6 ceiling 7 rear wall 8 side wall 9 side wall 10 dishware receptacle 11 dishware receptacle 12 handle 13 guidance mechanism 14 guide rail 15 guide rail 16 running rail 17 lifting device 18 pivoting arm 19 pivoting arm 20 bearing 21 bearing 22 bearing 23 bearing 24 electrical drive mechanism 25 controller 26 control line 27 side wall 28 housing 29 drive shaft 30 drag lever 31 bearing 32 bearing 33 sensor device 34 rear wall 35 locking mechanism 36 locking element 37 spring mechanism 38 rear wall 39 sensor device 40 detection unit 41 identification unit 42 memory unit 43 selection unit 501 circle 801 method step 802 method step 803 method step A extraction direction E insertion direction F.sub.1 actuating force F.sub.2 actuating force I current draw K1 weight-specific reference curve K2 weight-specific reference curve K3 weight-specific reference curve K4 minimum reference curve K5 maximum reference curve P.sub.A start position P.sub.E end position x travel distance