Fans and fans in parallel and series fan presentation
Fan structure: Rotor: the magnet, blades and shafts composition; stators: There silicon steel sheet, coil and bearing components; control circuit: IC induced by the magnet N. S. Pole circuit control via its coil is turned on and generates an internal excitation of the rotor to rotate.
Type: axial fans, DC fans
Select: overall cooling requirements
Parallel and series fan fan:
Parallel Fans: dual fans constant pressure in parallel, but will increase the amount of wind. Therefore increase the amount of wind to increase the cooling effect, in the design of power if the heat is too small, you can consider increasing the fan to resolve.
Series Fan: Results of the series fan is pressure to increase, but the wind changed. Second way is not to solve the heat problem, is generally used in the past is the use of too much wind resistance, to ensure that the amount of wind.
In order to obtain a low noise level noise must note the following:
System Impedance: Air flow resistance will cause air flow noise generation.
Airflow turbulence: due to poor design of the flow channel of air turbulence caused by high-frequency noise will appear, if it does not improve the flow channel is difficult to have a qualitative improvement.
Fan speed and size: the cooling fan speed sooner the better, the greater the larger the size of the fan air flow, cooling effect is better. The larger the fan speed, the higher the noise, the greater the larger the size of the noise.
Temperature rise: after reducing the temperature difference between the temperature rise, the cooling effect is reduced.
Vibration: vibration will cause the fan noise increased, reducing life expectancy as well as the speed is reduced.
Voltage fluctuation: The voltage fluctuation will cause the fan speed changes, so that job insecurity and will generate additional noise.
Design considerations: Some other requirements for the design must also be taken into account, in order to ensure the cooling effect.
In this paper, Changzhou Golden Sunflower finishing off the fan issue, For reprint please indicate the source http://www.jinkuihua178.com