A bladeless fan blows air from an aerodynamically designed structure with no external blades. It produces more constant airflow than traditional fans.
How Does It Work? Simple Explanation
The air flows through a channel in the pedestal up to the tube, which is hollow. The interior of the tube acts like a ramp. Air flows along the ramp, which curves around and ends in slits in the back of the fan. Air then flows along the surface of the inside of the tube and out toward the front of the fan. As air flows through the slits in the tube and out through the front of the fan, air behind the fan is drawn through the tube as well. The flowing air pushed by the motor induces the air behind the fan to follow. Air surrounding the edges of the fan will also begin to flow in the direction of the breeze. This curved design will thus increases the output of airflow by 15 times the amount it takes in through the pedestal's motor.
Design
Components
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Brushless motor
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Hollow pipe that is 5 inches wide
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10 inch hollow circular frame
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AC power supply & cord
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Dimmer switch for speed control
Brushless Motor
With the advent of cheap computers and power transistors, it became possible to "turn the motor inside out" and eliminate the brushes. In a brushless DC motor (BLDC), you put the permanent magnets on the rotor and you move the electromagnets to the stator. Then you use a computer (connected to high-power transistors) to charge up the electromagnets as the shaft turns.
Why Go Brushless?
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Because a computer controls the motor instead of mechanical brushes, it's more precise. The computer can also factor the speed of the motor into the equation. This makes brushless motors more efficient.
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There is no sparking and much less electrical noise.
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There are no brushes to wear out.
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With the electromagnets on the stator, they are very easy to cool.
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You can have a lot of electromagnets on the stator for more precise control. The only disadvantage of a brushless motor is its higher initial cost, but you can often recover that cost through the greater efficiency over the life of the motor.
Motor Specifications !
Output Power: 10 W
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Type: Asynchronous Motor
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AC Voltage: 220 - 240 V
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Rated input: 40 W
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Speed: 1500 rpm
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Phase: Single Phase
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Frequency: 50/60 Hz
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Rated Current: 0.25 - 0.80 A
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Temperature Range: -40 C to 100 C
Steps Involved
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Step 1: Air is drawn in
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Step 2: Air is accelerated
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Step 3: Air is induced
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Step 4: Air is entrained
Step 1
Up to 20 litres of air per second is drawn in by an energy-efficient, brushless motor. A combination of the technologies used in turbochargers and jet engines generates powerful airflow.
Step 2
Airflow is accelerated through an annular aperture. It passes over a 16° airfoilshaped ramp, which channels its direction.
Step 3
Air behind the fan is drawn into the airflow, through a process known as inducement.
Step 4
Air around the machine is also drawn into the airflow, through a process known as entrainment,
Airflow Comparison
Advantages These are of the advantages over using traditional fans !
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No external blades to get fingers caught up in, safe. This is good for family with kids. Aesthetically pleasing device with a sleek design. Blades cause buffeting. This fan has no buffeting.The blades on conventional fans cause unpleasant buffeting because they chop the air before it hits you. This bladeless fan amplifies surrounding air, giving an uninterrupted stream of smooth air. Very easy to clean and maintain.
Conclusion
We are able to conclude from this project that it is possible to build a fan that is more efficient and safer than traditional fans without making a lot of compromises in the process. Bladeless fans can also be made cheaper with lower cost materials and mass production. This project demonstrates that the coalescence of sensible design and proper engineering can be rewarding to the end consumer.
