How to choose a good fan?
如何选择一个好的风机？
The price of the fan?
风机的价格？
Fan style?
风机 style？
Fan performance?
风机的性能？
These are all things that consumers consider when buying wind turbines.
这些都是消费者在购买风机时考虑的事情。
In Bian Xiao's view, the above content is important, but consumers should not easily forget the working principle of the fan is also very important.
在边肖看来，以上内容固然重要，但消费者不要轻易忘记风机的工作原理也很重要。
The unpowered fan works by air convection.
无动力 风机通过空气对流工作。
The blade of the unpowered fan is in a certain arc, and the air is constantly flowing, which will push the stainless steel hood to rotate.
无动力 风机的叶片呈一定弧度，空气不断流动，会推动不锈钢风帽旋转。
At the same time, it will drive the indoor air to rise, accelerate the air renewal, and achieve the effect of keeping the indoor air fresh, dust removal and smoke exhaust.
同时会带动室内空气上升，加速空气更新，达到保持室内空气清新、除尘、排烟的效果。
Weather resistance: curved blades with a notch between each blade.
耐候特性:弧形叶片，每个叶片之间有一个缺口。
When rotating, the blades complement each other to fill this gap.
旋转时，叶片互补填补这个空隙。
A large amount of rainwater is thrown off along the circular knot line, and a small amount of rainwater flows along the blades and leaves to the roof, without flowing into the turbine.
大量的雨水沿着圆形节线甩出，少量的雨水沿着叶片和树叶流到屋顶上，没有流入涡轮。
At the same time, the rotating turbine allows air to flow out of the gaps between the blades, preventing rain from entering.
同时，旋转的涡轮使空气从叶片之间的缝隙流出，阻止雨水进入。
Light: The turbine exhaust is installed on the roof of the car, including the base, the total weight is about 15Kg/ seat, which is quite light, so the load can be ignored when designing the steel structure.
轻便:涡轮排气安装在车顶，包括底座在内总重量约为15Kg/座，相当轻，所以在设计钢结构的荷载时可以忽略不计。
Operating device: Using high-tech ball bearings, fully enclosed, permanently self-lubricating, allowing it to rotate in the breeze below 3.2Km/h.
操作装置:采用高科技滚珠轴承，全封闭、永久自润滑，使其能在3.2Km/h以下的微风中旋转。
Strong and durable: fan imported bearing, no lubrication, wear-resistant, blade bracket made of stainless steel, acid and alkali resistance, corrosion resistance, service life of more than ten years.
坚固耐用:风机进口轴承，免润滑，耐磨，刀片支架采用不锈钢，耐酸碱，耐腐蚀，使用寿命十几年。
The turbine fan does not stop rotating for 24 hours, the dust is not easy to adhere, and it is very convenient even if it needs to be cleaned.
涡轮风机24小时不停止转动，灰尘不易附着，即使需要清理也非常方便。