How to distinguish whether the screw fan is frequency conversion or fixed frequency

To distinguish whether the screw fan is frequency conversion or fixed frequency, you can check and judge from the following aspects:

check the motor nameplate: Usually, a nameplate will be affixed to the motor to indicate the model and parameters of the motor. On the nameplate, you can find out whether there is a "frequency conversion" or related identification, which is a direct method to judge whether the screw fan is a frequency conversion model.

Check the control cabinet: there is usually a frequency converter in the control cabinet of the variable frequency screw fan, while the control cabinet of the fixed frequency fan is relatively simple and there is no frequency converter. By observing the internal structure and components of the control cabinet, the type of fan can be indirectly judged.

Observe the operating characteristics: The variable frequency screw fan can adjust the motor speed according to actual needs, so as to realize the continuous adjustment of the air volume. During operation, it can be observed whether the fan can smoothly change the speed. The fixed frequency fan speed is fixed, can not achieve continuous adjustment.

Consult the manufacturer or supplier: If the above method cannot determine the type of fan, you can directly contact the manufacturer or supplier of the screw fan to consult them about the specific model and configuration of the fan.

Please note that when making any inspection or judgment, it is important to ensure safe operation and follow the relevant operating guidelines and recommendations. If you are not sure how to operate or judge, it is recommended to seek professional help.