Washing machine and control method

The invention discloses a washing machine and a control method. The washing machine comprises a shell, a top cover and an extrusion mechanism, wherein a washing cavity is arranged in the shell; a feeding port is formed in the top of the washing cavity; the top cover is arranged on the shell in an openable and closable manner and is used for opening and sealing the feeding port; the extrusion mechanism comprises an extrusion part and a driving part; the driving part is arranged on the top cover; and the extrusion part is arranged at the power output end of the driving part and faces the washing cavity. When the washing machine needs to wash washings, the top cover covers the feeding port in a sealing mode, and the driving part can drive the extrusion part to apply intermittent extrusion acting force to the washings in the washing cavity. According to the washing machine, the damage to the washings can be reduced in the washing process. 本发明公开了一种洗衣机及控制方法，洗衣机包括壳体，所述壳体内设有洗涤腔，所述洗涤腔的顶部形成一投放口；顶盖，可开合地设置在所述壳体上，用于打开和封盖所