External Rotor Air Conditioning Fans – Keruite Product Introduction

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Keruite Air Conditioning Group presents our external rotor air conditioning fans, featuring an innovative motor topology that delivers exceptional performance in a compact, space-saving design. Unlike conventional motors where the stator surrounds the rotor, external rotor motors place the stator in the center with the rotor rotating on the outside, directly driving the fan impeller without belts or couplings. This integrated structure achieves higher power density, lower noise levels, and improved energy efficiency compared to traditional internal rotor designs. External rotor fans utilize a specialized motor configuration where the rotor with permanent magnets surrounds the stator and is directly connected to the fan impeller. The motor is positioned inside the impeller, achieving maximum self-cooling effect and eliminating the need for additional cooling systems. Key Features: High Power Density: External rotor designs achieve up to 19% lower electromagnetic costs and 16% volume reduction compared to traditional internal rotor motors at the same output power. Space-Saving Compact Design: The motor built inside the impeller creates a highly integrated assembly requiring significantly less installation space than traditional belt-driven or coupled fan systems. Enhanced Efficiency: Advanced designs achieve static pressure efficiency up to 75% and A-weighted sound levels below 16 dB(A). The direct-drive configuration eliminates transmission losses. Quiet Operation: Dynamically balanced impellers combined with optimized aerodynamic design minimize vibration and turbulence noise. Integrated Self-Cooling: The motor placed inside the impeller experiences maximum airflow across its surface, providing natural cooling and extending service life. Wide Operating Range: Reliable operation from -30°C to +60°C, with IP54 protection rating and insulation class B or F. Built-in thermal protectors ensure safety. Variable Speed Capability: 100% variable speed control via EC technology. Built-in Modbus RTU, 0-10V, and PWM control interfaces allow seamless BAS integration. Flexible Configurations: Available in single-phase (220V) and three-phase (380V), 50/60Hz. Custom voltage and frequency options available. Technical Specifications: Airflow Capacity: 500 – 40,000 m³/h Static Pressure: Up to 860 Pa Motor Types: AC induction, BLDC, EC Power Supply: 220V/380V, 50/60Hz Insulation Class: B or F Protection Rating: IP54 Temperature Range: -30°C to +60°C Speed Control: 0-10V, PWM, Modbus RTU (EC models) Impeller Material: Galvanized steel, aluminum alloy, or stainless steel Housing Material: Galvanized steel with powder coating or stainless steel Available Models: Centrifugal Series: Forward-curved multi-blade, airflow up to 40,000 m³/h, pressure up to 860 Pa Plug Fan Series (EC): Backward-curved impeller, airflow up to 25,000 m³/h, pressure up to 2,400 Pa Axial Fan Series: For condenser and heat exchanger applications, CE certified Applications: Central air conditioning systems, AHUs, fan coil units, air curtains Heat pump and condenser units Cleanroom and HVAC equipment for pharmaceutical, electronics, food processing Commercial ventilation for shopping malls, hotels, offices, hospitals Industrial HVAC for warehouses, factories, data centers Electronic equipment cooling for server rooms, telecom shelters Quality Assurance: Manufactured in compliance with ISO9001. Each unit undergoes airflow performance testing, sound level measurement, vibration analysis, electrical safety inspection, and thermal protection verification. Certified with CE, CCC, and RoHS. Why Choose Keruite? Proven Performance: Higher efficiency with lower energy consumption Compact Design: Reduces equipment footprint Quiet Operation: Low noise for sensitive environments Reliable Quality: 25+ years of HVAC manufacturing experience Customized Solutions: Tailored specifications for your project Complete Support: From consultation to after-sales service Have an HVAC project requiring external rotor fans? Contact us for a customized solution. 🌐 Website: https://www.krtfj.cn 📧 Email: liyanlin@dzkrt.com 📞 WhatsApp/WeChat: +8613356848575 #ExternalRotorFan #HVAC #CentrifugalFan #AirHandlingUnit #ECFan #Keruite #ChinaManufacturer #HVACsupplier #CommercialHVAC #IndustrialHVAC #FanTechnology #EnergyEfficiency #B2B