Control method for layered washing in dishwasher and dishwasher

A control method for layered washing in a dishwasher, comprising:

• S101:
• determining a rack for holding items to be washed;
• S102:
• determining a first spray water path corresponding to the rack based on the determined rack;
• S103:
• controlling a water divider piece to rotate to a position for opening the first spray water path and closing other spray water paths, such that the first spray water path is in communication with a water supply device;
• S104:
• performing a pre-washing step, wherein the spray water path is directed to spray water towards the determined rack,
• wherein step S103 includes S201:
• controlling a driving piece to rotate a rotary piece, wherein a rotation of the rotary piece synchronously rotates the water divider piece connected thereto and multiple triggers on the rotary piece;
• stopping the driving piece upon receiving a signal from a water path detection device triggered by a trigger corresponding to the first spray water path, such that a through hole of the water divider piece is in communication with the first spray water path and blocked from other spray water paths,
• wherein step S201 further includes:
• 1) during the rotation of the rotary piece, the multiple triggers sequentially pushing a first elastic contact point of the water path detection device, causing the first elastic contact point to be in contact with a second elastic contact point and send a signal to a controller;
• and 2) receiving signals emitted by the water path detection device triggered by each of the multiple triggers until the signal that the trigger corresponding to the first spray water path pushing the first elastic contact point to be in contact with the second elastic contact point is received, and then stopping the driving piece.