1. The automobile heat dissipation fan works with a long cylindrical air duct (the diameter of the fan blades of the air duct is relatively large), because the diameter is large, it can be protected
u003cbru003eUse a lower speed based on the overall air circulation, thereby reducing the noise caused by high-speed operation;
u003cbru003e2. The impellers of automobile cooling fans are carefully calculated, and the distance between the fan blades is deliberately disordered, presenting a state of 'unequal distance': why is it not like a DC fan blade? Isometric? This is because the audio generated by the rotating wind wheel and the air is 'irregularThere are two types of noise, narrow-band noise and broadband noise. Regular narrow-band noise is easy to attract people’s attention and annoys people; while broadband noise is relatively close to the noise situation in nature, although it cannot be eliminated, it is relatively 'hard to hear' and makes people Not that upset.
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u003cbru003eRelated links:
u003cbru003eHigh temperature resistant AC fan http:///products-detail.asp?cpidu003d80
u003cbru003eCar AC Fan http:///products-detail.asp?cpidu003d81