Disclosed are a washing machine having a dual-drum of a main drum and a sub drum, and an assembly method thereof. The washing machine comprises: a cabinet; a tub provided in the cabinet; a main drum rotatably mounted in the tub; a sub drum mounted in the main drum so as to perform a relative rotation with the main drum; a hollow type outer shaft connected to the main drum; an inner shaft connected to the sub drum in the outer shaft; and a driving motor, wherein the driving motor comprises: a stator; an outer rotor connected to the inner shaft, and rotated outside the stator; and an inner rotor connected to the outer shaft, and rotated inside the stator, and wherein the driving motor drives the main drum and the sub drum in an independent manner.

A laundry module performs a washing function to wash laundry and has a height that is less than the height of a laundry appliance. The laundry module can be part of a modular laundry system including the laundry appliance. The laundry module can be vertically arranged with the laundry appliance, such as by supporting the laundry appliance thereupon.

Provided are an opening and closing structure, a component, and a washing machine. The opening and closing structure includes: a supporting body formed with an opening part; and the lid supported by the supporting body in a free rotation manner. An elastic deformation part forming a rotation center and a periphery of the lid has flexibility. One of the supporting body and the elastic deformation part is provided with a shaft forming the rotation center of the lid, and the other is provided with a hole insertable by the shaft. One of the supporting body and the elastic deformation part is provided with a pin, and the other is provided with a recess receivable to the pin with a clearance during opening and closing of the lid. The recess gradually becomes shallower as the lid goes from an open position to an opposite side of a closed position.

A laundry appliance includes a cabinet. A blower is disposed within the cabinet that delivers accessory air through an accessory airflow path. An accessory bar assembly is in fluid communication with the accessory airflow path. The accessory bar assembly is configured to suspend articles therefrom and to provide the accessory air for conditioning the articles.