| 摘要 |
<p>A wash arm arrangement (100) for a dishwasher is disclosed. The wash arm arrangement comprises a central arm (121) adapted to be rotatably connected with a first liquid supply shaft (123) for providing pressurized liquid during operation of the dishwasher. The central arm has a first nozzle (130), arranged for outputting a jet of liquid during operation thereby providing a first reaction force F c for rotating the central arm about its axis of rotation in a first direction. The wash arm arrangement further comprises a satellite arm (122) rotatably arranged on a second liquid supply shaft (124) arranged on an outer end of the central arm, the satellite arm having a second nozzle (131) arranged for outputting a jet of liquid during operation thereby providing a second reaction force F s for rotating the satellite arm about its axis of rotation in a second direction. The first and second nozzles are arranged such that the instantaneous value of a resulting momentum M tot for the central arm about its axis, comprising a first momentum M c caused by a horizontal reaction force portion F cy of the first reaction force F c , and a second momentum M s , caused by the movement of the satellite arm and comprising a momentum created by a horizontal reaction force portion F sy of the second reaction force F s , alters periodically during operation.</p> |
