What a vacuum cleaner actually moves
A vacuum cleaner's fan creates a pressure difference that drives air through the nozzle and into the machine. Moving air carries loose dust with it, while a bag, filter or separator captures the debris. The cleaner depends on airflow, so a blocked hose can weaken pickup even when the motor sounds busy.
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Dust travels with moving air
The fan inside a vacuum cleaner lowers pressure along the intake path. Air from the room flows towards that lower-pressure region through the nozzle and hose.
This moving air carries loose particles into the machine. Depending on the design, a bag, filters or a cyclone separator removes much of the debris before the air leaves. Powered brushes may also loosen material from carpet fibres.
The motor's noise is not a direct measure of useful airflow. A restriction can reduce the volume of air moving through the nozzle while the motor continues running.
- The fan creates the pressure difference.
- The airflow transports dust.
- The collection system separates debris from the air.
Nozzle shape and the gap above the surface matter because they influence where air moves and how effectively it picks up particles.