1. The household basic structure of a vacuum cleaner is divided into five parts according to its function: the power part: the vacuum cleaner motor and the governor. Filtering system: dust bag, front filter, rear filter. Functional part: winding and releasing mechanism, dust full indication, button or sliding switch. Protective measures: dust free bag protection, high vacuum protection, anti interference protection, overheat protection, and anti-static protection. Accessories: handle and hose, connecting pipe, floor brush, flat suction, round brush, bed sheet brush, sofa suction, hook, and strap.2. Classification by structure: Vertical: Most of them are in the shape of a circular barrel or square, divided into upper and lower parts. The upper part is equipped with a motor, which is the power part, and the lower part is a dust collection box. Horizontal type: rectangular or vehicle shaped, with front and rear parts. The front part is a dust collection box, and the rear part is a motor part.3. Portable, it generally comes in four forms: shoulder type: small in size, carried over the shoulder when used, with low power Rod type: shaped like a rod, with a handle at the upper end and a suction nozzle at the lower end, with low power Portable: Smaller size, can be used directly in the hand, with less power; Miniature: Multi battery powered, smaller size, mostly used for cleaning clothes, instruments, etc., with low power.