how the dyson bladeless fan works - plug in air purifier

In October 2009, James Dyson consumer electronics, known for its range of vacuum cleaners, launched a new device called Dyson Air Multiplier to the market.
The air multiplier is a fan with unusual features: it does not have any visible blades.
It seems to be a circular tube mounted on the base.
The shallow tube is only a few inches deep.
Looking at the device, you will not expect to feel the breeze from the installed circle.
No moving parts in sight.
But if you turn on the fan, you will feel the air blowing out of the tube.
How does it work?
Without fan blades, how does the open circle push the air into the breeze?
As you might imagine, here are some scientific principles that work.
There is also an electronic component.
Although there are no blades inside the tube, there is a brushless motor on the base of the fan that sucks in the air and feeds it into the circular tube.
The air flows along the inside of the unit until the slit inside the tube is reached.
This provides basic airflow and you will feel the breeze if you stand in front of the fan.
According to Dyson, the breeze generated by the Air Multiplier is more consistent and stable than the breeze generated by a standard fan with blades.
Since there is no rotating blade, the breeze from the fan will not blow you with a short gust.
What is the secret behind technology?