US 12,390,077 B2
Dishwasher, method and computer program product
Stephan Lutz, Zusamaltheim (DE); Stefan Pollithy, Forheim (DE); Markus Wecker, Gundremmingen (DE); Igor Hoffmann, Dillingen (DE); and Marco Kienle, Mödingen (DE)
Assigned to BSH Hausgeräte GmbH, Munich (DE)
Appl. No. 18/027,955
Filed by BSH Hausgeräte GmbH, Munich (DE)
PCT Filed Oct. 27, 2021, PCT No. PCT/EP2021/079769
§ 371(c)(1), (2) Date Mar. 23, 2023,
PCT Pub. No. WO2022/101007, PCT Pub. Date May 19, 2022.
Claims priority of application No. 10 2020 214 200.9 (DE), filed on Nov. 11, 2020.
Prior Publication US 2024/0023785 A1, Jan. 25, 2024
Int. Cl. A47L 15/00 (2006.01); A47L 15/22 (2006.01); A47L 15/42 (2006.01)
CPC A47L 15/0049 (2013.01) [A47L 15/22 (2013.01); A47L 15/4259 (2013.01); A47L 2401/24 (2013.01); A47L 2501/20 (2013.01); A47L 2501/26 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A dishwasher, comprising:
a dishwasher cavity;
a spray apparatus for dispensing washing liquor;
a drive facility including an electric motor designed to actively drive the spray apparatus using an output shaft positioned to transfer torque from the electric motor to the spray apparatus so as to apply washing liquor to an item to be washed arranged in the dishwasher cavity, said drive facility including a detection unit for detecting a motor rotational speed of the electric motor, wherein a first axis of rotation of the output shaft is different from a second axis of rotation of the spray apparatus; and
a control apparatus configured to:
determine a blockage of the spray apparatus in dependence upon the detected motor rotational speed by:
actuating the electric motor such that the spray apparatus performs a test run, in response to a door of the dishwasher closing, to move the spray apparatus such that the spray apparatus performs at least one complete rotation in the dishwasher cavity to detect whether the blockage is present;
comparing the detected motor rotational speed to a predetermined target rotational speed; and
determining an existence of the blockage of the spray apparatus in response to the detected motor rotational speed being lower than the predetermined target rotational speed; and
determine a blockage position of the spray apparatus using a predetermined relationship between a position of rotation of the output shaft and a corresponding position of rotation of the spray apparatus.