I. Is the wall fan a mechanical or a remote control?
The remote control version of the wall fan has many stalls, with timing and appointment functions, and more importantly, sleep Wind, don’t worry about catching a cold when you blow the fan at night. The remote control version is generally recommended for use at home, because sometimes we don’t want to get up and turn off the fan.
The mechanical version of the wall fan is relatively simple, with 3 gears, which can be timed, suitable for use in places with many people, and can be turned off when not in use.
Second, the wall fan is better with three leaves or five leaves
The wall fan with five leaves is better. Compared with the three-blade fan and the five-blade fan, under the same speed conditions, the five-blade fan produces a smaller air flow, and of course the resistance torque generated by the air to the three-blade fan is also small. Therefore, when the motor speed parameter is determined, under the condition of power permitting, the more the number of propeller blades, the greater the air volume. It can be seen that the five-blade fan is better than the three-blade fan.
Generally speaking, the more blades of an electric fan, the better the air supply effect. Although it will increase the load, the more blades there are, the more the “wind” can be cut into smaller pieces, making the blown wind softer and the mute effect better. The “five-blade fan” mainly uses the principles of aircraft wings and propellers. The fans designed using these principles have obvious characteristics of high efficiency and low noise.
The single-leaf area of the three-blade fan is larger than that of the five-blade fan, and the range of air action is also increased, which will produce greater noise; however, the mold and production of the three-blade fan is more expensive than that of the five-blade fan. It is much easier and the cost is lower, and the connection between the root of the fan blade and the central shaft is wider, so the fan blade of the three-blade fan using the same material is much stronger than the fan blade of the five-blade fan. Therefore, generally speaking, the fans with low noise are mostly five-blade fans; and the wind power of the five-blade fans is relatively soft.
