usb electric fan things principle
The USB fan works the same way as a regular fan, except for the way it’s connected to the power source.
The main component of electric fan is: AC motor. The principle is: the current coil in the magnetic field force and rotation. Electrical energy is converted into mechanical energy, and because of the resistance of the coil, a part of the electrical energy cannot be prevented from being converted into heat. In addition, DC motor, DC brushless motor and other small power motor in the application of small fans is more and more common.
When the electric fan is running (assuming there is no heat transfer between the room and the outside world), the temperature of the room will increase instead of decreasing. To analyze the reason for the rise in temperature: when the electric fan, because of the current through the coil of the electric fan, the wire is resistance, so that it can not prevent the occurrence of heat to release heat, the temperature will naturally rise. But why do people feel cool? Because the body surface has a lot of sweat, when the electric fan things up, indoor air will flow up, so that it can promote the rapid evaporation of sweat, linked to “evaporation needs to absorb a lot of heat”, so people will feel cool.
usb fan recuperation mode
1. Before use, please read the instruction manual in detail to fully grasp the structure, performance, installation, use and recuperation mode of electric fans and matters needing attention.
2. The fan blade is the main component. When installing, disassembling, scrubbing or using, it must be enhanced to prevent deformation.
3, electric fan oil or ash, should be removed in real time. Do not use gasoline or strong lye wipe, so as not to damage the efficacy of the outside painted parts.
4. When operating the function switches, keys and knobs, the action should not be too fast or too fast, nor should two keys be pressed at the same time.
5, the collection of fans should be thoroughly removed from the outside of the oil, dust, and dry soft cloth wipe, and then wrapped with brown paper or cleaning cloth. Storage address should be dry ventilation to prevent extrusion.
6, the electric fan in the use of the process such as hot, abnormal burnt taste, shake the head, slow speed and other failures, do not continue to use, should be real-time cut off the power inspection.
7, USB should not often twists and turns, so it is easy to cause the internal wire to break.
