Fan blades are important components of the fan. The setting of the number of fan blades is to be related to power according to the power of the wind. From the perspective of aerodynamics, the greater the leaves.Whether the "arc" is scientific, the right leaves of the blade will become larger, so it will increase the wind force "more effort".
Fan blade principle
The main part of the electric fan is: AC motor.Its working principle is: the wire coil turns in the magnetic field.The form of energy conversion is: Electricity is mainly transformed into mechanical energy. At the same time, because the coil has resistance, some of the inevitable electrical energy must be converted into heat energy.The temperature of the indoor indoors when the electric fan is working (assuming that the room and the outside world are not hot) will not only decrease, but will increase.Lets analyze the reasons why the temperature is rising one by one: When the electric fan works, because the current has a resistance to the coil of the electric fan, the wire is resistant, so it will inevitably generate heat out of heat outward, so the temperature will rise.But why do people feel cool? Because the bodys body surface has a lot of sweat, when the electric fan works, the indoor air will flow, so it can promote the rapid evaporation of sweat, combined with "evaporation needs to be absorbed.
Fan blade production
Production 1: The required materials include: abandoned fragments or similar corrugated cardboard boxes, round regulations, pencils, scissors, straight ruler, glue.Step: 1. Use scissors to cut the batch of Sa packing boxes, and select the relatively clean part as a cardboard material for DIY fan blades.2. Search from the Internet to the expansion drawings of the fan blades, and draw it on the hard cardboard with round regulations, straight ruler, and pencils.3. Cut the drawn fan blades from the paperboard of the packaging box. Two round hard cardboard also needs to be used as a thick bearing for the central axis.4. Disassemble the outer cover of the electric fan, cancel the circular old fan blades, and dig holes in the diameter of the rotating shaft on the diameter of the rotating shaft on the hard paper fan blades and bearings.Note that there is a raised place on the fans rotation shaft, which is used to fix the fan blades. We need to open the same card slot on the cardboard fan blades of the same way.
Fan blade design
Wind speed: The speed of wind speed is determined by the speed of the fan blade speed, which is related to the size, shape and even height of the fan blades.Therefore, the design of fan blades involves many physical knowledge, and it is not simply achieved.Evilization: The air volume is mainly affected by the area and wind speed.At the same speed, the greater the curvature of the blade, the greater the air volume and wind pressure of the fan.Wind pressure: Wind pressure reflects the strong index of the fan. Generally, when the spacing of the blades is not too large, the design scheme of multi -blades can be adopted to avoid affecting the air volume and wind pressure. At the same time, the number of leaves is often the base. This is to maintain it.The balance of the entire fan system.Romantic: The airflow driven by the romantic fan when turning, determining the wind blowing distance and area of ??the fan, which is mainly affected by the arc of the fan blade.Generally speaking, the curved curved arc can effectively concentrate the romance, so that the fan has good heat dissipation performance.
The more fan blades, the more better, the better
The more the number of fan blades, the faster the speed, the greater the amount of air supply, the greater the corresponding consumption power.At the same speed, the more the number of leaves, the smaller the noise of the fan.

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