1. The principle of vacuuming. The fan impeller of the vehicle-mounted vacuum cleaner is driven by the motor at a high speed, and the air in the impeller is discharged from the fan at a high speed, and at the same time, the air in the dust suction part is continuously supplemented into the fan. This creates a higher pressure difference with the outside world. The dust and dirt of the suction nozzle are sucked into the dust collection part with the air, and filtered by the filter, and the dust and dirt are collected in the dust cylinder. 2. The original of the vacuum cleaner. The suction vacuum cleaner is also equipped with a series of cleaning brushes and nozzles for cleaning corners. 3. Throat: All suction-type vacuum cleaners will be equipped with a hard hose, which is used to connect the soft hose and accessories for cleaning. 4. Electric brush: The cleaning head of the internal vacuum cleaner is a special accessory for hybrid vacuum cleaners. 5. Round brush head: also has a smaller nozzle, which can do 360* rotation. 6. Flat nozzle: also known as gap nozzle, it is a slender, flat hard nozzle. Especially suitable for cleaning walls, radiant heaters, corners and shallow and narrow places. 7. Dust sweeping brush: made of long and soft bristles, suitable for cleaning curtains, walls, etc.