DISHWASHER

1 . A dishwasher comprising:

a tub;

a spraying device disposed in the tub and including a plurality of spray nozzles, the spraying device being rotatable about a first axis, the first axis being approximately vertical when the dishwasher is in a working position; and

a washing liquid supply device configured to supply the spraying device with washing liquid;

wherein the spraying device includes a rotatable spray control device configured to open and close a flow path of washing liquid to the spray nozzles so as to provide pulsed spray jets.

2 . The dishwasher as recited in claim 1 wherein the spray control device is disposed in an area of the first axis and is rotatable in a plane of rotation of the spraying device at a rotational speed different from a rotational speed of the spraying device.

3 . The dishwasher as recited in claim 2 wherein the spray control device includes at least one substantially cylindrical closing element having a plurality of passage openings in an outer wall thereof, the cylinder defining a second axis that coincides with the first axis.

4 . The dishwasher as recited in claim 3 wherein:

the plurality of spray nozzles includes a first and a second spray nozzle;

the spraying device includes a first channel connected to the first spray nozzle and a second channel connected to the second spray nozzle; and

the passage openings are disposed so that, as a function of a relative rotation between the closing element and the spraying device, a first path of the washing liquid to the first channel is interrupted when a path of the washing liquid to the second channel is open.

5 . The dishwasher as recited in claim 4 wherein the spraying device includes a spray arm having a first and a second spray arm half, and the closing element includes an odd number of closure surfaces.

6 . The dishwasher as recited in claim 5 wherein the closing element has three closure surfaces.

7 . The dishwasher as recited in claim 1 wherein:

the spraying device includes a spray arm, the plurality of nozzles being disposed in the spray arm; and

the spray control device includes a cylindrical body having a plurality of cutouts provided at a circumference thereof, the cutouts being disposed in an area that overlaps with the spray nozzles.

8 . The dishwasher as recited in claim 7 wherein the spray arm extends along a main arm axis, an axis of rotation of the cylindrical body being parallel to the main arm axis.

9 . The dishwasher as recited in claim 1 wherein the spray control device includes at least one substantially cylindrical closing element having a plurality of passage openings in an outer wall thereof, the cylinder defining a second axis that coincides with the first axis, and further comprising an electric motor configured to drive the closing element.

10 . The dishwasher as recited in claim 1 wherein:

the spraying device includes a spray arm, the plurality of nozzles being disposed in the spray arm; and

the spray control device includes a cylindrical body having a plurality of cutouts provided at a circumference thereof, the cutouts being disposed in an area that overlaps with the spray nozzles;

and further comprising an electric motor configured to drive the cylindrical body.

11 . The dishwasher as recited in claim 1 wherein the spray control device includes at least one substantially cylindrical closing element having a plurality of passage openings in an outer wall thereof, the cylinder defining a second axis that coincides with the first axis, and further comprising at least one magnet configured to drive the closing element.

12 . The dishwasher as recited in claim 1 wherein the spray control device includes at least one substantially cylindrical closing element having a plurality of passage openings in an outer wall thereof, the cylinder defining a second axis that coincides with the first axis, and further comprising a gear operatively connected to the spraying device and configured to drive the closing element by a rotation of the spraying device.

13 . The dishwasher as recited in claim 1 wherein:

the spraying device includes a spray arm, the plurality of nozzles being disposed in the spray arm; and

the spray control device includes a cylindrical body having a plurality of cutouts provided at a circumference thereof, the cutouts being disposed in an area that overlaps with the spray nozzles;

and further comprising a gear operatively connected to the spraying device and configured to drive the cylindrical body by a rotation of the spraying device.

14 . The dishwasher as recited in claim 1 wherein the spray control device includes at least one substantially cylindrical closing element having a plurality of passage openings in an outer wall thereof, the cylinder defining a second axis that coincides with the first axis, the closing element being rotatable by a flow of the washing liquid flowing to the spray nozzles.

15 . The dishwasher as recited in claim 1 wherein:

the spraying device includes a spray arm, the plurality of nozzles being disposed in the spray arm; and

the spray control device includes a cylindrical body having a plurality of cutouts provided at a circumference thereof, the cutouts being disposed in an area that overlaps with the spray nozzles, the cylindrical body being rotatable by a flow of the washing liquid flowing to the spray nozzles.

16 . The dishwasher as recited in claim 1 wherein the spray control device includes at least one substantially cylindrical closing element having a plurality of passage openings in an outer wall thereof, the cylinder defining a second axis that coincides with the first axis, and further comprising a turbine configured to drive the closing element.

17 . The dishwasher as recited in claim 1 wherein:

the spraying device includes a spray arm, the plurality of nozzles being disposed in the spray arm; and

the spray control device includes a cylindrical body having a plurality of cutouts provided at a circumference thereof, the cutouts being disposed in an area that overlaps with the spray nozzles;

and further comprising a turbine configured to drive the closing element.

18 . The dishwasher as recited in claim 16 wherein the turbine includes a plurality of blades disposed on a shaft extending through a center of the closing element.

19 . The dishwasher as recited in claim 17 wherein the turbine includes a plurality of blades disposed on a shaft extending through a center of the cylindrical body.

20 . The dishwasher as recited in claim 16 wherein the turbine includes a plurality of blades disposed inside the closing element.

21 . The dishwasher as recited in claim 17 wherein the turbine includes a plurality of blades disposed inside the cylindrical body.

22 . The dishwasher as recited in claim 16 wherein the closing element is supported on a side thereof.

23 . The dishwasher as recited in claim 17 wherein the cylindrical body is supported on a side thereof.

24 . The dishwasher as recited in claim 20 further comprising a sliding bearing disposed at a center of the spraying device and a stub shaft disposed on the closing element, the stub shaft being received by the sliding bearing.

25 . The dishwasher as recited in claim 22 further comprising a sliding bearing disposed at a center of the spraying device and a stub shaft disposed on the closing element, the stub shaft being received by the sliding bearing.

26 . The dishwasher as recited in claim 1 wherein:

the spraying device includes a spray arm, the plurality of nozzles being disposed in the spray arm; and

the spray control device includes a cylindrical body having a plurality of cutouts provided at a circumference thereof, the cutouts being disposed in an area that overlaps with the spray nozzles, the cylindrical body including a conical shape at an end thereof, a cone tip of the conical shape forming a bearing contact point in the spray arm for mounting the cylindrical body.