Smoke Absorber Science Project: Working Principle Explanation

To explain the working principle of a smoke absorber built using cardboard, a DC motor, and a filter.

How To Make a Smoke Absorber Machine Working Model
How To Make a Smoke Absorber Machine Working Model

This smoke absorber demonstrates basic principles of air filtration, showing how fans and filters can work together to improve air quality. By understanding these principles, we see how simple devices can address environmental issues.

Working Principle:

How To Make a Smoke Absorber Machine Working Model
  1. Air Flow Creation:
    • The core component of this science project is the DC motor, which is connected to a fan blade.
    • When the motor is powered by a battery, it spins the fan blade, creating airflow. This airflow is crucial as it pulls in smoke-filled air into the absorber.
  2. Air Intake:
    • The box made of cardboard has an open side for air intake. As the fan spins, it generates a low-pressure area inside the box, causing air to flow into the box through the intake.
  3. Filtration Process:
    • Inside the box, there is a compartment holding a filter
    • As the air passes through the filter, smoke particles and other pollutants get trapped in the filter material.
  4. Clean Air Exhaust:
    • After passing through the filter, the cleaned air exits through the exhaust opening on the opposite side of the box.
    • The continuous operation of the fan ensures a steady flow of air through the filter, maintaining the cleaning process.


  • Motor and Fan: The DC motor spins the fan, creating airflow.
  • Air Intake: Smoke-filled air is drawn into the cardboard box through the intake opening.
  • Filtration: The air passes through a filter inside the box, where smoke and pollutants are trapped.
  • Clean Air Output: Cleaner air is expelled from the opposite side of the box.

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