DE102020123416A1 - Method for cleaning items to be washed in a dishwasher and dishwasher - Google Patents

Abstract

The invention relates to a method for cleaning items to be washed in a dishwasher (1), comprising a washing compartment (2), a washing basket (3) in which the items to be washed can be arranged, and a rotatable spray arm (5) for spraying, which is arranged below the items to be washed of the items to be washed with washing liquor, a collecting pot (8) arranged in the lower area of the washing container (2), and a circulating pump (9) with which the washing liquor collected in the collecting pot (8) is conveyed to the spray arm (5), the method using the following steps comprises: determining the position of a hollow vessel (30) within the wash basket (3) within the wash basket; turning the rotatable spray arm (5) arranged below the wash basket (3) into a rotary position in which the spray jets emitted by the spray arm (5) into the Hitting the hollow vessel (30); maintaining the rotary position of the spray arm (5) during an intensive rinsing step (300) for a predetermined intensive rinsing duration; after the intensive rinsing step, carry out it normal washing step (400), whereby the items to be washed are exposed to spray jets from the spray arm (5) while the spray arm (5) rotates. The invention also relates to a dishwasher for carrying out this method.

Description

The invention relates to a method for cleaning items to be washed in a dishwasher, comprising a washing compartment, a washing basket in which the items to be washed can be arranged, a rotatable spray arm arranged under the items to be washed with washing liquid, and a spray arm located in the lower area of the washing compartment Collecting pot, as well as a circulation pump, with which the washing solution collected in the collecting pot is conveyed to the spray arm.

Dishwashers usually have a wash basin, a wash basket in which the wash ware can be arranged, a rotatable spray arm arranged under the wash ware basket for spraying the wash ware with washing solution, a collecting pot arranged in the lower area of the wash container, and a circulating pump with which the im Collecting pot collected wash liquor is conveyed to the spray arm.

Typically, items of dishes that are soiled to different degrees are washed in dishwashers. This poses the problem of cleaning particularly stubbornly soiled items of wash ware, such as pots, pans and casserole dishes in particular, sufficiently well, while at the same time other wash ware parts, such as sensitive dishes, should be protected. In this context, a method is known in which the lower spray arm, which is assigned to a lower basket, and the upper spray arm, which is assigned to an upper basket, are alternately charged with washing liquor, the circulation pump being operated at different speeds.

From the DE 10 2017 102 057 A1 A method for intensive cleaning is known in which a vessel to be cleaned is to be positioned in a special intensive cleaning zone of a washing rack equipped with an additional spray device and in which the intensive cleaning zone is subjected to a particularly intensive cleaning in a program section of the washing program, which is particularly carried out by a high temperature and increased detergent concentration. With this method, however, the vessel to be cleaned must be arranged by the user in a special position specified by the manufacturer when it is placed in the dishwasher so that it can be cleaned by the additional spray device.

The invention thus has the problem of providing an improved method for cleaning particularly stubbornly soiled items to be washed, which method enables simplified and more flexible handling without increasing the consumption of water and energy.

According to the invention, this problem is solved by a method having the features of claim 1 and by a device having the features of claim 9. Advantageous refinements and developments of the invention emerge from the following subclaims.

A method is proposed for cleaning items to be washed in a dishwasher, comprising a washing compartment, a washing basket in which the items to be washed can be arranged, a rotatable spray arm located under the items being washed for spraying the items to be washed with washing liquor, and a collecting pot located in the lower area of the washing compartment , as well as a circulation pump with which the washing solution collected in the collecting pot is conveyed to the spray arm.

• - Ermitteln der Position eines vom Spülgut umfassten Hohlgefäßes innerhalb des Spülkorbes;
• - Verdrehen des unterhalb des Spülkorbes angeordneten, rotierbaren Sprüharms in eine Drehstellung, in der vom Sprüharm abgegebene Sprühstrahlen in das Hohlgefäß treffen;
• - Beibehalten der Drehstellung des Sprüharms während eines Intensivspülschritts für eine vorgegebene Intensivspüldauer;
• - Nach Ablauf des Intensivspülschritts Durchführen eines Normalspülschritts, wobei das Spülgut mit Sprühstrahlen des Sprüharms beaufschlagt wird, während der Sprüharm rotiert.

The method according to the invention comprises the following steps:

• - Determining the position of a hollow vessel enclosed by the items to be washed within the wash basket;
• - Rotation of the rotatable spray arm arranged below the washing basket into a rotary position in which the spray jets emitted by the spray arm hit the hollow vessel;
• - Maintaining the rotary position of the spray arm during an intensive rinsing step for a predetermined intensive rinsing duration;
• - After the intensive washing step, a normal washing step is carried out, whereby the items to be washed are exposed to spray jets from the spray arm while the spray arm rotates.

The hollow vessel, the position of which is determined within the washware basket, can be, for example, a pot, a pan or a casserole dish. In particular, the position is understood to mean the position of the hollow vessel within the horizontal washing plane spanned by the washing basket, which position could thus be described, for example, by XY coordinates within the XY plane defined by the washing basket.

It is of particular advantage of the method according to the invention that the hollow vessel can be placed in the washing basket at any point by the user. The user is not restricted to certain areas, so that loading the items into the wash basket is much easier and more flexible. Nevertheless, the hollow vessel can be cleaned particularly intensively during the intensive washing step, in which the wetting of other items to be washed is largely avoided. The intensive rinse step has in particular, a first rinsing characteristic which differs from a second rinsing characteristic of the subsequent normal step. The first and second washing characteristics are each distinguished by special settings of the circulating pump speed and / or the washing water temperature and / or the washing water quantity and / or the detergent concentration within the washing water. The intensive washing step can thus be optimized with regard to reliable removal of stubborn soiling and the normal washing step with regard to protecting sensitive items to be washed. In this case, the hollow vessel can be operated during the intensive rinsing step, for example, with an increased circulation pump speed and thus a higher rinsing pressure, without additional water consumption occurring. In other words, the first flushing characteristic can include a higher, in particular significantly higher, circulating pump speed than the second flushing characteristic.

The position of the hollow vessel within the washing basket can be determined in various ways.

According to a first exemplary embodiment, the position can be determined by evaluating a user input. For this purpose, the dishwasher can, for example, have an operating device that enables such user input. Such an operating device can for example be provided on the device side or else be provided by an external, in particular mobile device, for example by a smartphone or the like, which is in communication with a control device of the dishwasher. By means of the operating device, the user can specify the positioning of the hollow vessel, for example in a washing basket map shown on a display of the operating device, in particular after the hollow vessel has been placed in the washing rack or when the washing program has started.

According to a further exemplary embodiment, the position can be determined by automated evaluation of the signal that was detected by an optical sensor. The optical sensor can, for example, be a camera arranged in the washing compartment.

• - Der Sprüharm wird nacheinander in mehrere Drehpositionen verfahren;
• - Bei jeder Drehposition wird das Spülgut mit vom Sprüharm abgegebenen Sprühstrahlen beaufschlagt, wobei die Umwälzpumpe zunächst mit einer vorgegebenen Anfangsdrehzahl betrieben wird und die Drehzahl anschließend sukzessive erhöht wird bis zu einer Abbruchdrehzahl, bei der ein instabiler Pumpenlauf der Umwälzpumpe erkannt wird;
• - Jeder Drehposition wird die auf diese Weise erkannte Abbruchdrehzahl zugeordnet;
• - Anhand einer Auswertung der jeweils einer Drehposition zugeordneten Abbruchdrehzahlen wird die Position des Hohlgefäßes innerhalb des Spülgutkorbes bestimmt.

According to a particularly advantageous feature of the invention, the position determination can comprise a method with the following steps:

• - The spray arm is moved to several rotary positions one after the other;
• - In each rotational position, the items to be washed are exposed to spray jets emitted by the spray arm, the circulation pump initially being operated at a predetermined initial speed and the speed then being gradually increased up to an abort speed at which an unstable pump run of the circulation pump is detected;
• - The abort speed recognized in this way is assigned to each rotary position;
• The position of the hollow vessel within the washware basket is determined on the basis of an evaluation of the respective abortion speeds assigned to a rotational position.

With this determination method, the position can be determined completely automatically and therefore particularly conveniently for the user, while at the same time the outlay on equipment is comparatively low. The method exploits the effect that the hollow vessel to be cleaned itself prevents wetting of other parts of the items to be washed, e.g. those arranged next to the hollow vessel or in a washing basket above the hollow vessel. The hollow vessel only binds a small amount of water. This means that when the spray arm is placed under the hollow vessel, the wash liquor can be circulated with a very small amount of wash liquor compared to normal operation without the circulating pump running unstable. In this case, a circulation operation of the wash liquor with a comparatively very high circulation pump speed is also possible without the pump running of the circulation pump becoming unstable. An unstable circulation pump operation occurs when the water seal present at the suction mouth of the circulation pump is so small that the pump not only sucks in water but also air, and thus an air-water mixture, so the circulation pump slurps. The speed of the circulating pump fluctuates greatly, typically by several 100 revolutions / min in conventional circulating pumps. The pump pressure also fluctuates in a corresponding manner, as does the power consumption of the circulating pump motor.

To carry out the position determination method, the spray arm is moved step by step into several, in particular 5 to 20, rotary positions. The multiple rotational positions are preferably arranged over the entire circle, i.e. distributed over 360 °, in particular distributed homogeneously. A suitable step size between successive rotary positions can represent, for example, a circle subdivision of 30 °, so that 12 rotary positions are approached.

After moving to a rotary position, the items to be washed are exposed to the spray jets emitted by the spray arm. The circulating pump is initially operated at a predetermined initial speed for each rotational position. In particular, this is selected to be so low that in in any case, ie regardless of the arrangement of items to be washed in the wash basket, a stable pump run of the circulating pump sets. The speed of the circulating pump is then increased successively until the pump running of the circulating pump becomes unstable. The speed of the circulation pump at which the unstable pump run occurs is recorded as the abort speed and assigned to the corresponding rotary position. The speed is then reduced again to the initial speed, the spray arm is moved to the next rotational position and an abort speed is determined for this in the same way. Such a procedure takes place in a corresponding manner for each of the several rotational positions.

Finally, the position of the hollow vessel within the washware basket is determined on the basis of an evaluation of the abort speeds, which are each assigned to a rotational position.

The evaluation of the abort speeds can include a comparison of the abort speeds with a predetermined threshold value. The evaluation of the abort speeds can additionally or alternatively include a comparison of the abort speeds with one another. The evaluation of the abort speeds can also include, in particular, a determination of the maximum abort speed, in particular also a comparison of the maximum with a determined minimum abort speed. The evaluation of the abort speeds can also include the creation and / or evaluation of an abort speed profile, in particular also an evaluation of the gradients of an abort speed profile.

A large number of technical possibilities that are well known to the person skilled in the art are available for monitoring the pump running, in particular for detecting unstable pump running. In particular, the speed of the circulation pump can be monitored for this purpose. Alternatively or additionally, the pump pressure and / or the power consumption of the circulating pump motor can also be monitored in a corresponding manner. It can be concluded that the pump is running unstable if the fluctuations of one or more of these parameters determined in the process exceed a predetermined threshold value.

According to a further feature of the invention, an increased, in particular significantly increased, speed of the circulating pump is set during the intensive washing step compared to the normal washing step. Due to the higher speed, the washing liquor is sprayed into the hollow vessel with a particularly high pressure and thus an increased cleaning effect is achieved. In particular, the speed is selected to be so high that it would lead to an unstable pump run in a normal washing step taking place with the spray arm rotating with the same amount of washing liquor.

Furthermore, a heating device of the dishwasher is operated in such a way that the maximum wash liquor temperature reached during the intensive wash step is higher, in particular significantly higher, than the maximum wash solution temperature reached during the normal wash step. In this way, the hollow vessel can be sprayed at a particularly high washing liquor temperature and thus an increased cleaning effect can be achieved.

A wash program typically includes at least the wash program sections CLEAN, RINSE and DRY. According to the method according to the invention, the washing program section CLEAN comprises an intensive washing step and a subsequent normal washing step. In particular, it can be provided that the heating device in the CLEANING program section is operated exclusively or essentially during the intensive washing step to heat the washing solution. In particular, the heating device can already be switched off before the change to the normal washing step and / or can no longer be operated in the normal washing step.

According to a further feature of the invention, the normal washing step is preferably carried out with a larger amount of washing liquor than the intensive washing step. In particular, the washing liquor is supplemented with fresh water introduced for this purpose at or before the start of the normal washing step. The mixture of the washing liquor heated in the intensive washing step with the cold fresh water has a mixed temperature which is also suitable for cleaning sensitive dishes during the normal washing step. With such a procedure, despite the increased temperature in the intensive rinsing step and the associated improved cleaning performance due to the small amount of water to be heated, no increased energy requirement is necessary. In addition, it is achieved in a simple manner that the sensitive dishes are not exposed to excessive temperatures during the normal washing step.

According to a further feature of the invention it is provided that the detergent is added during the intensive washing step, in particular at the beginning of the intensive washing step. In particular, in connection with the small amount of wash liquor in the intensive wash step, a comparatively high detergent concentration is provided in the wash liquor, as a result of which an increased cleaning effect is achieved without increasing the amount of detergent. By adding fresh water introduced to the washing solution at or before the start of the normal washing step, the Detergent concentration reduced in the normal wash step compared to the intensive wash step.

According to a further feature of the invention, it is provided that the intensive rinsing step only takes place when a specific wash program or a specific wash program option of a wash program is selected.

On the device side, a dishwasher is also proposed which has a washing container, a washing basket in which the wash ware can be arranged, a rotatable spray arm arranged under the wash ware basket for spraying the wash ware with washing liquor, a collecting pot arranged in the lower area of the washing container and a circulation pump, with which the rinsing solution collected in the collecting pot can be conveyed to the spray arm. In addition, the dishwasher has a control device which is set up to carry out the method according to the invention described above.

The dishwasher preferably comprises a drive device with which the spray arm can be driven by a motor. By means of the drive device, the spray arm, controlled by the control device, can selectively move to a large number of different rotational positions or any rotational position.

Alternatively, however, the dishwasher can also be designed without a motor-driven spray arm. Instead, the dishwasher can have a blocking device for the spray arm, with which the spray arm, the rotation of which in this embodiment is caused by the impulse of the washing solution, can be stopped in several rotational positions, controlled by the control device, and held there for a predefinable period.

According to an exemplary embodiment of the invention, the spray arm is designed to be one-armed or essentially one-armed. Starting from its axis of rotation, the spray arm extends only in one direction or at least essentially in one direction. Alternatively, the spray arm can also have two arms, but all or at least the largest proportion of the spray nozzles are arranged on one side of the spray arm and none or only a very small proportion of the spray nozzles on the radially opposite side of the spray arm. In addition to saving water, this increases the accuracy of the position determination and allows an improved delimitation of the areas that are to undergo intensive cleaning from the other areas.

According to a further feature of the invention, there is a position sensor with which the rotational position of the spray arm can be detected. In terms of sensor technology, this can be directly connected to a drive device for the spray arm or else to the spray arm. It is also connected to the control device of the dishwasher.

This can improve the accuracy when approaching certain rotational positions. The position sensing by the position sensor can include, for example, a starting point detection, for example via a button, and proceeding therefrom, otherwise, via a time control. An automatic calibration can take place over the determined time for one revolution of the spray arm in connection with the starting point detection.

• 1 eine erfindungsgemäße Geschirrspülmaschine gemäß einem Ausführungsbeispiel
• 2 ein Ablaufdiagramm für ein erfindungsgemäßes Verfahren
• 3a-d eine grob vereinfachte Darstellung eines Spülkorbs einer erfindungsgemäßen Geschirrspülmaschine aus der Sicht von oben mit vier verschiedenen Drehstellungen des Sprüharms
• 4 einen Sprüharm gemäß einem ersten Ausführungsbeispiel
• 5 einen Sprüharm gemäß einem zweiten Ausführungsbeispiel
• 6 ein Ablaufdiagramm für einen Positionsermittlungsschritt des erfindungsgemäßen Verfahrens
• 7 ein Abbruchdrehzahlprofil

Embodiments of the invention are shown purely schematically in the drawings and are described in more detail below. It shows

• 1 a dishwasher according to the invention according to an embodiment
• 2 a flow chart for a method according to the invention
• 3a-d a roughly simplified representation of a washing basket of a dishwasher according to the invention from the view from above with four different rotational positions of the spray arm
• 4th a spray arm according to a first embodiment
• 5 a spray arm according to a second embodiment
• 6th a flowchart for a position determination step of the method according to the invention
• 7th an abort speed profile

In 1 is a dishwasher according to the invention 1 shown. This includes a rinsing container 2 , one in the rinsing container 2 retractable and retractable lower basket 3rd , in which items to be washed can be arranged, one under the lower basket 3rd arranged around an axis of rotation 50 rotatable spray arm 5 for spraying the items to be washed with washing solution, one in the lower area of the washing compartment 2 arranged collecting pot 8th , as well as a circulation pump 9 . Without restriction of generality, the dishwasher in this exemplary embodiment has two washing levels, namely above the lower basket 3rd an upper basket 4th , as well as three spray arms, namely in addition to the one under the lower basket 3rd arranged spray arm 5 one under the upper basket 4th arranged spray arm 6th as well as a ceiling spray arm 7th . That in the company of the Spray arms 5 , 6th , 7th dispensed water is from the collecting pot 8th collected with which the circulation pump 9 via a suction mouth 10 and a suction mouth channel connected thereto is in fluid communication. By means of the circulation pump 9 can the water through pipes 11 back to the spray arms 5 , 6th , 7th be promoted. A water switch, not shown in detail 12th enables the individual spray arms to be acted upon as desired 5 , 6th , 7th . Finally it is to the collecting pot 8th also a drain pump 13th connected, with the washing liquor from the dishwasher 1 can be promoted.

2 shows a flowchart for a method according to the invention, which is used, for example, in a dishwasher 1 from 1 is carried out. The method first has a position determination step 100 in which the position of a hollow vessel enclosed by the items to be washed within a wash basket 3rd is determined. A positioning step then takes place 200 , in which the underneath the wash basket 3rd arranged spray arm 5 is rotated into a rotary position in which the spray arm 5 hit the spray jets emitted into the hollow vessel. This is followed by an intensive rinse step 300 carried out in which the in the positioning step 200 assumed rotational position is maintained and the hollow vessel from the spray arm 5 rinsing solution is applied for a specified intensive rinse duration. After completing the intensive rinse step 300 becomes a normal wash step 400 carried out in which the items to be washed with spray jets of the spray arm 5 is applied while the spray arm 5 rotates. In a dishwasher 1 as in 1 can be shown during the normal wash step in addition to the spray arm 5 In addition, further spray devices or spray arms 6th , 7th can be treated with rinsing liquor.

3a-d shows a schematic, roughly simplified representation of a washing rack to explain the method 3rd from the view from above, i.e. onto the XY plane representing the rinsing plane. In the wash basket 3rd is a large item of wash ware 30th , like a baking dish, arranged with its curved side down. Furthermore, the one is below the wash basket 3rd around an axis of rotation 50 rotatably arranged spray arm 5 to see which one is in the 3a-d is shown in a different rotational position, as well as the trajectory 31 of the spray arm 5 with its rotation. How immediately understandable is the hit from the spray arm 5 via its spray nozzles 51 emitted spray jets in the case of the 3a-c shown rotary positions into the baking dish, in the case of the in 3d but not shown rotary position.

4th shows a spray arm which can advantageously be used according to the invention 5 . This can in particular be the one in the dishwasher 1 from 1 below the lower basket 3rd arranged spray arm 5 act. The spray arm 5 is in the present case asymmetrical, namely one-armed or at least essentially one-armed. Starting from the axis of rotation 50 extends the actual spray arm, ie the area of the spray arm in which the spray nozzles 51 are arranged, only in one direction. The spray arm points in the opposite direction 5 just a short extension 52 which has no spray nozzles, but to ensure that the spray arm rotates well 5 acts only as a counterweight.

5 shows an alternative embodiment of the spray arm 5 . This is also around the axis of rotation 50 rotatable, in particular rotatable by a motor, mounted and has one of the spray arm 5 carried spray unit 53 on which one, from the axis of rotation 50 spaced, spray unit axis of rotation 54 rotatable on the spray arm 5 is arranged. While the spray arm is preferably driven by a motor, the spray unit rotates 53 preferably not by a motor but by the impulse of the washing liquor. According to the invention, the position of the item to be washed 30th first determined and the spray arm 5 then, for example, in the in 5 Rotated position shown rotated and this rotary position of the spray arm 5 during an intensive rinse step 300 maintained. The spray unit rotates in the process 53 so that the spray jets come out of the nozzles 51 with the spray arm stationary 5 at different points on the wash ware 30th can hit, which improves cleaning.

6th FIG. 10 shows a flowchart for an example of a position determination step 100 a method according to the invention, as it is in particular in 2 is described. The spray arm becomes 5 in one approach 110 first move to a rotary position. The spray arm is in this rotary position 5 in a subsequent loading step 120 charged with washing liquor, the circulation pump 9 is initially operated with a predetermined initial speed and the speed is then increased successively. As soon as a monitoring device shows an unstable pump run of the circulation pump 9 recognizes, the speed is not increased further and the application step 120 is cancelled. In one assignment step 130 becomes the speed at which the application step 120 aborted, assigned as abort speed of the current rotary position. After that, the spray arm 5 in a new approach step 110 Move to a further rotary position and a corresponding application step for this rotary position 120 and assignment step performed. If all rotational positions of a predetermined or predeterminable set of rotational positions in this way each have an abort speed has been assigned, an evaluation step follows 140 , in which the abort speeds assigned to each rotational position are evaluated, and finally a determination step 150 , where based on the evaluation in the evaluation step 140 the position of a hollow vessel within the washing basket 3rd is determined.

To explain the position determination step 100 is in 7th the determined abort speed n is plotted for different rotary positions (“1” to “12”), which results in a speed profile 145. Adjacent rotational positions can represent rotational positions offset by the same rotational angle, for example 30 °, for example. In the present case, the illustrated speed profile 145 can in particular be the result of the abort speed determination for the in the 3a-d represent the situation shown. The rotary position "12" sets the position of the spray arm 5 in the position pointing vertically upwards in the image plane, ie in the “12 o'clock position”, the rotary position “1” is the position of the spray arm 5 in the "1 o'clock position" and the rotary position "2" the position of the spray arm 5 in the "2 o'clock position" etc. 3a-d Positioning of the wash ware shown 30th in the upper right corner of the wash basket 3rd causes all spray nozzles in the rotary positions “11”, “12”, “1” and “2” (ie between the “11 o'clock position” and the “2 o'clock position”) 51 of the spray arm 5 below the wash ware 30th are located (cf. 3a-c ). In these rotary positions, the pump run of the circulating pump only becomes unstable at a comparatively very high speed, since the wash liquor is removed from the wash ware 30th is stopped and quickly and without a long distance back to the collecting pot and the circulating pump connected to it. This results in a high abort speed for these rotary positions, as in 7th to recognize. In contrast, at least in the rotary positions “5”, “6”, “7” and “8”, no spray jets from the spray arm hit 5 in the wash ware 30th (cf. for example 3d ), so that there is a low abort speed for these rotary positions. From the abort speed profile 145 determined in this way, the control device of the dishwasher can determine the position of the item to be washed 30th determine and move the spray arm for the intensive washing step into a suitable position in which the spray arm emitted spray jets into the wash ware 30th to meet.

List of reference symbols

1

dishwasher

2

Rinsing container

3

Rinsing basket

4th

Rinsing basket

5

Spray arm

6th

Spray arm

7th

Spray arm

8th

Collecting pot

9

Circulation pump

10

Suction mouth

11

management

12th

Water switch

13th

Drain pump

30th

Wash ware

31

Trajectory

50

Axis of rotation

51

Spray nozzles

52

Appendix

53

Spray unit

54

Spray unit rotation axis

100

Position determination step

110

Approach step

120

Loading step

130

Assignment step

140

Evaluation step

150

Determination step

200

Positioning step

300

Intensive rinse step

400

Normal rinse step

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102017102057 A1 [0004]

Claims (12)

A method for cleaning items to be washed in a dishwasher (1), comprising a washing compartment (2), a washing basket (3) in which the items to be washed can be arranged, a rotatable spray arm (5) arranged under the washing basket (3) for spraying the Wash items with wash liquor, a collecting pot (8) arranged in the lower area of the washing container (2), and a circulating pump (9) with which the washing liquor collected in the collecting pot (8) is conveyed to the spray arm (5), the method comprising the following steps : - Determining the position of a hollow vessel (30) enclosed by the items to be washed within the washing basket (3); - Rotation of the rotatable spray arm (5) arranged below the washing basket (3) into a rotary position in which the spray jets emitted by the spray arm (5) strike the hollow vessel (30); - Maintaining the rotary position of the spray arm (5) during an intensive rinsing step (300) for a predetermined intensive rinsing duration; - After the end of the intensive washing step, a normal washing step (400) is carried out, whereby the items to be washed are exposed to spray jets from the spray arm (5) while the spray arm (5) rotates. Method for cleaning items to be washed in a dishwasher (1) according to Claim 1 , wherein the step (100) of determining the position of the hollow vessel (30) within the washing basket (3) has the following sub-steps: - the spray arm (5) is successively moved into several rotational positions; - In every rotary position, the items to be washed are exposed to the spray jets emitted by the spray arm (5), whereby the circulating pump (9) is initially operated at a specified initial speed and the speed is then gradually increased up to a stop speed at which an unstable pump run of the circulating pump ( 9) is recognized; - The abort speed recognized in this way is assigned to each rotary position; - The position of the hollow vessel (30) within the washing basket (3) is determined on the basis of a comparison of the respective abortion speeds assigned to a rotational position. Method for cleaning items to be washed in a dishwasher (1) according to one of the preceding claims, wherein the step of determining the position of the hollow vessel (30) within the washing basket (3) comprises evaluating a user input or a signal detected with an optical sensor. Method for cleaning items to be washed in a dishwasher (1) according to one of the preceding claims, in which a higher, in particular significantly higher, circulating pump speed is set during the intensive washing step (300) than during the normal washing step (400). Method for cleaning items to be washed in a dishwasher (1) according to one of the preceding claims, wherein the maximum wash liquor temperature reached during the intensive wash step (300) is higher, in particular significantly higher than the maximum wash liquor temperature reached during the normal wash step (400). Method for cleaning items to be washed in a dishwasher (1) according to one of the preceding claims, wherein the normal washing step (400) is carried out with a larger amount of washing liquor than the intensive washing step (300). Method for cleaning items to be washed in a dishwasher (1) according to one of the preceding claims, wherein a heating device for heating the washing liquor is operated essentially during the intensive washing step. Method for cleaning items to be washed in a dishwasher (1) according to one of the preceding claims, in which the intensive washing step only takes place when a specific wash program or a specific wash program option is selected. Dishwasher (1), comprising a washing compartment (2), a washing basket (3) in which the items to be washed can be arranged, a rotatable spray arm (5) arranged under the washing rack (3) for spraying the items to be washed with washing solution, and one in the lower one Area of the washing container (2) arranged collecting pot (8), a circulating pump (9) with which the washing liquor collected in the collecting pot (8) can be conveyed to the spray arm (5), and a control device which is set up to carry out the method according to a of the preceding claims. Dishwasher according to the preceding claim, characterized in that the spray arm (5) can be driven by a motor. Dishwasher after Claim 9 , characterized in that the spray arm (5) is designed essentially with one arm. Dishwasher according to one of the preceding Claims 9 to 11 , characterized in that there is a position sensor with which the rotational position of the spray arm (5) can be detected.

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