Intelligent External Rotor EC Centrifugal Blower with Stepless Speed Control - Precision Cooling for Modern Heat Pumps

Accurate air volume control:
Built-in speed sensor (FG/TACH feedback)+MCU closed-loop PID algorithm.
Air volume control accuracy ± 3%, speed control accuracy ± 1%.
Automatically compensate for changes in system resistance (such as filter dust accumulation) to maintain a constant airflow without the need for manual intervention.

Deep integration of heat pump matching:
The EC fan drive board can receive PWM/0-10V speed control signals from the heat pump main control, and can also achieve bidirectional communication through MODBUS - the fan returns real-time speed, current, and fault status to the main control
Quick response to defrosting mode: When defrosting with a heat pump, the fan needs to stop or reverse within seconds, and the EC fan's electronic brake without inertia impact meets this requirement.
Multi-evaporator parallel scheme: One heat pump host with multiple indoor units, each EC centrifugal fan independently regulates speed to achieve precise temperature control in different zones.

HVAC system integration:
Variable Air Volume (VAV) Terminal: The EC centrifugal fan serves as the power unit for the VAV Box and independently adjusts the air supply volume based on the signal from the room temperature controller.
Fresh air unit (FAU/PAU): EC fan replaces AC fan+frequency converter, simplifies control cabinet, reduces fault points.
Fan coil unit (FCU): Compact EC centrifugal fan embedded in FCU, replacing traditional three-speed AC motor, achieving stepless speed regulation and silent operation.