Species eye is "Waterproof Cooling Fan" a feature, not only the models and more, of the same type have different parameters and different conductor distinguish fan frame, and some have three-blade type, six pages sheet-type, vane type seven, eleven sheet type, etc., where the source of the Wind with you know what kind of fan blades cooling demand for your product
1, the number of blades: a variety of "Waterproof Cooling Fan" section curve of the blade, and other basic inclination similar, each blade width depends on the height of the blades often. In order to ensure the blade pitch will not be too large, the impact of wind pressure, high diameter is relatively small (ie, relatively thin) fan blades increase the number of multi-use method to compensate.
2, leaf inclination: "Waterproof Cooling Fan" inclination greater the pressure difference between the upper and lower leaf surface, the greater the pressure at the same speed; but the surface pressure, may have reflux phenomenon, but reduced the source of the Wind fan performance . Therefore, the blades should also enhance the inclination within certain limits.