【 48 v dc fan wholesale 】 Need to pay attention to the fan noise
【 48 v dc fan wholesale 】 System impedance ( 系统阻抗)
between a casing into the tuyere and outlet range from 60% to 80% of all system impedance, the greater the additional air, noise is relatively high. The higher the system impedance, needed for the cooling air flow is larger, so in order to reducing noise to a small zui, system impedance will xu to zui low degree. Airflow disturbing
along the flow path encountered obstacles caused by the interference flow noise. So any obstacles, especially in the key into the scope of tuyere and the outlet, xu will avoid, in order to reduce noise. Fan speed and size
due to the high speed fan than low speed fan large noise, so should as far as possible to try and choose low speed fan. And a larger size, low speed of the fan, often than size, high speed of the fan, under the quiet when conveying the same volume. Temperature
within a system, cooling the air volume and allowed is inversely proportional to the temperature rise. Allow temperature increased slightly, can substantially reduce the air volume required. Therefore, if the limitation on the strong and allow temperature rise slightly relax, the required air volume will be reduced, the noise can be reduced.
link:
ac 220 v - fan 230 v http:///products- 细节。 asp吗? Cpid = 74
high temperature fan http:///products- communication 细节。 asp吗? cpid = 80
