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Anonymous users2024-01-24Axial flow is preferred, followed by mixed flow, and finally centrifugal fan is selected.
There are two reasons: the ventilation fan does not need too high pressure, so the use of axial fans can use less power to obtain a large air volume, which is one of them; In the case of the same power, a large part of the power of the centrifugal fan is converted into the pressure of the fan, so that the air volume obtained is much smaller than that of the axial fan, which is the second. The mixed-flow fan is between the axial fan and the centrifugal fan, the pressure is greater than the axial fan, smaller than the centrifugal fan, and the air volume is smaller than the axial fan and larger than the centrifugal fan.
The accident fan mainly responds to fire accidents, and must have a smoke exhaust function (280 degrees Celsius burning for half an hour, with national fire protection certification qualification), this fan uses more axial fans, but it also depends on the parameters.
Industrial products speak with parameters, the air volume and pressure required by a 50 square kitchen and a 100 square kitchen must be different, the parameters are different, the price is different, and the quality of the configured motor is not the same.
It is better to use a low-noise cabinet centrifugal fan, but the axial fan is too noisy.
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The impeller is greasy, and the dynamic balance is not good, it will vibrate and produce noise, and you can also see whether the bearing is damaged by oil loss.