The working principle of the unpowered series mainly includes the following aspects:
Natural wind speed drive: The unpowered fan uses the natural wind speed in nature to drive the fan's turbine to rotate. When the natural wind blows through the fan's turbine blades, the blades are rotated by the tangential force, thereby driving the entire fan to work.
Air convection principle: The unpowered fan uses the principle of indoor and outdoor air convection to accelerate and transform any parallel air flow into a vertical air flow from bottom to top to improve the indoor ventilation effect. This device does not require electricity and relies on natural wind and air convection to achieve ventilation.
Thermal pressure principle: When there is a temperature difference between indoor and outdoor, the density of the air will change. High temperature air has a smaller density and rises; low temperature air has a larger density and falls. Unpowered fans use this principle to discharge indoor hot air and inhale outdoor cold air to achieve air circulation.
Wind pressure principle: Unpowered fans use uniquely designed air ducts to make natural wind generate a pressure difference on the surface of the building, drive the fan blades to rotate, and thus achieve ventilation. The greater the outdoor wind speed, the better the ventilation effect.
Centrifugal force and negative pressure effect: The turbine blades of the unpowered fan are designed to have a specific lift angle. When the hot air flow caused by natural wind or the temperature difference between indoor and outdoor pressurizes the blades, the blades rotate under the action of tangential force, and the stale hot air in the room is discharged by centrifugal force and negative pressure effect.
