Xiaomi Youpin has played host to another innovative product – the Weiyuan Smart Handheld Bladeless fan. The fan features a design which has won the German iF design 2019 award as well as the Good Design and Red Dot design award. It is under crowdfunding for just 39 yuan (~$5) but will retail for 69 yuan (~$10) after the exercise. 
The bladeless fan adopts a simple but impressive design. The design is such that it blows air from a ring with no external blades. Due to the absence of physical blades, the fan will not generate dust or hurt children’s fingers. The Bladeless Fan adopts a working mechanism similar to other known brands like Dyson. The air is drawn in by a compressor in the base and then directed up into a ring. It comes out of a slit around the ring and passes over a shape like that of an aircraft wing (Coanda effect).
The bottom of the Weiyuan Smart Handheld Bladeless fan adopts a 7-wing diagonal flow impeller, which can form a high-pressure airflow into the air. When the air guide vane is pressurized due to the high airflow, the air is then pushed toward the air outlet at a wind speed of 7.52m/s.
The bladeless fan has a sophisticated internal design with noise reduction at the foundation. The high-pressure airflow passes silently and the fan’s running sound is controlled within 55dB which is cooler and quiet.
The Weiyuan Smart Handheld Bladeless fan is powered by a built-in 2000mAh lithium battery. Designed with three-speed level controls, the battery can last up to 10 hours if the fan is operated at the lowest speed level. It can be charged through a USB-C interface and has the 5V/1A power rating. The battery can be fully charged in 3 hours between charge.
Another impressive aspect is its lightweight. The bladeless fan weighs just 137 grams making it a compact device that can fit into a backpack easily.
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(source)
