Bladeless fans, despite their name, do use a fan, but it's hidden within their base. This hidden fan draws air into the unit and forces it up into the circular ring.
The Process Explained
Here's how a bladeless fan creates airflow:
- Air Intake: A powerful fan, usually a turbine-style impeller, resides in the base of the unit. This fan draws air in through vents in the base.
- Air Movement: This air is then pushed upwards through a hollow stem into the circular ring.
- Annular Aperture Acceleration: Inside the ring, the air is forced through a narrow slot known as an annular aperture. This aperture spans the entire circumference of the ring, accelerating the airflow, as seen in the reference, "And is accelerated out through an annular aperture. This slot spans the entire length of the Ring."
- Entrainment: As the accelerated air exits the ring, it creates a low-pressure area that draws in the surrounding air. This process is called entrainment and significantly amplifies the airflow.
Key Concepts
Here's a breakdown of the key concepts that enable a bladeless fan to function:
| Concept | Description |
|---|---|
| Hidden Fan | Located in the base and pulls air into the unit. |
| Annular Aperture | A narrow slot within the ring that accelerates the air. |
| Entrainment | The process where the accelerated airflow draws in surrounding air, increasing the overall airflow volume. |
Benefits of Bladeless Fans
- Safety: The lack of exposed blades makes them safer, especially for households with children and pets.
- Ease of Cleaning: The smooth surfaces are simple to wipe clean, without the hassle of disassembling blades.
- Modern Design: Bladeless fans often sport a sleek, modern design that can fit in with a variety of home decor.
Bladeless fans effectively circulate air by employing a unique combination of hidden fans, annular apertures and entrainment.
