Bladeless fans are becoming the new jargon in the home interior and cooling market. The question that comes up is what are bladeless fans, and how do they work. First, let us review the simple physics behind the performance of these fans.
Digging in the Past
In 2009, British tech manufacturer James Dyson invented and released a product Air Multiplier - which had blades, but they are hidden inside the pedestal stand. It was more power-efficient, quieter, and softer than others. It is more like technological witchcraft that a fan’s blades are hidden inside a fan!
How do Bladeless Fans Work?
Bladeless Fans work differently. Using physics and aerodynamics, it multiplies the air it sucks in, so it generates less noise and uses less energy in the whole process.
Like currently obtainable super energy-efficient fans, the bladeless fans also use BLDC motors. The air is set in motion through the channel in the pedestal, through a curved path, and comes out from small slits around the hoop. With the physical laws of inducement and entrainment, surrounding air also becomes drawn in multiple areas around the fan. As a result, a small low-pressure region is created, pulling the air from behind it, forming a tropical storm. This simultaneous working of pushing and pulling air creates a quiet, constant, and even flow of cool breeze.
Using these laws makes the outflow of airflow increased upto 15 times more than that pushed through the pedestal’s BLDC motor. Thus, it is known as an air multiplier too. The price may be a little beyond a normal fan’s price, but the result is a filled cylinder of cool breeze and smooth functioning without the sharp blades of traditional fans. Air multiplier is an eye-pleasing and less energy-consuming fan, even when children's are around, with no fear of hands being chopped from the rotating group.
Performance & Conclusion
In terms of energy efficiency, bladeless fans consume 65W of energy in delivering 130CMM of cool breeze. Also, there are no regulatory standards of energy efficiency for these fans in India.
For those who prefer aesthetics and novelty in their interior, bladeless fans are good choices for them. However, if one is looking for sustainable, energy-efficient airflow over a large area, conventional fans and super energy-efficient fans choose to go.