The working principle of the DC cooling fan.mini fan heater Processing

　　Now with the increasingly serious environmental problems, environmental protection has become one of the hot topics discussed by everyone. We all know that industrial production consumes a lot of energy, so the reduction of industrial production has always been our focus. For fans often used in industrial production, DC cooling fans are available. So what is the working principle of the DC cooling fan?

　　The DC cooling fan can push a large amount of airflow to the ground, forming a certain height of airflow layer on the ground to move horizontally, thus contributing to the overall air circulation; the advantage of this lies in the all-round ground coverage and the three-dimensional circulation of the air.

　　Ideally, we can imagine the wind blown by the fan as a columnar airflow, and the outer surface of the columnar airflow will rub against the air, then resistance = K1 (resistance constant) * perimeter ventilation = k2 (speed constant) * cross-sectional area. Compare a fan with a diameter of 720mm to a fan with a diameter of 7200mm:

　　1. A fan with a diameter of 720mm: perimeter=0.72×3.14=2.26m cross-sectional area=0.36×0.36×3.14=0.407 square meters

　　2. A fan with a diameter of 7200mm: perimeter=7.2×3.14=22.6m cross-sectional area=3.6×3.6×3.14=40.7 square meters

　　It can be seen that the resistance of a large fan passing through the same area of airflow is 0.1 times that of a small fan.

　　Principle: The frictional force of the large airflow fluid movement is relatively small, so that the large fan can drive a large amount of air but requires relatively less energy than the small fan! Once the inertia of the air is overcome, a large amount of air flow has its own kinetic energy This enables it to maintain a continuous flow of air with little follow-up power. The airflow friction of small fans is relatively large, and most of the energy is lost in the friction process.

　　After years of painstaking research and exploration, a propeller fan blade with outstanding performance has been developed by integrating foreign advanced aviation technology. It only needs to rotate slowly in the air to form a continuous and silent breeze flow. The slow rotation of the uniquely efficient airfoil blades creates a massive airflow that pushes downward, creating a near-perfect propeller exhaust.

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