The 160 series mini size centrifugal fans, with a moderate 160mm diameter, provide strong airflow without taking up too much space. They are ideal for applications requiring space and moderate airflow. These fans operate stably at a standard 230V voltage, ensuring continuous ventilation and cooling for equipment.
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READ MOREWhat are the noise control measures for 160 series mini size centrifugal fans?
Noise Control Measures
1. Optimized Impeller and Casing Structure
Utilizing a forward-curved impeller and streamlined air inlet design reduces airflow impact noise, achieving low-noise operation.
2. Use of High-Efficiency Acoustic Materials
Embedding sound-absorbing cotton or sound insulation panels within the fan casing significantly reduces propagated noise, typically by 2–3 dB.
3. Precise Speed Control
Smooth acceleration and deceleration are achieved through variable frequency drive (VFD) or PWM control, avoiding impact noise caused by sudden speed changes.
4. Noise Testing and Quality Monitoring
According to the standards in "Noise reduction in centrifugal fans: A literature survey," each fan undergoes a sound pressure level (SPL) test before leaving the factory to ensure compliance with industry noise limits.
| Measure | Description |
| Optimized Impeller Geometry | The forward‑curved impeller is aerodynamically shaped to reduce flow‑induced noise, as confirmed by small‑fan acoustic tests. |
| Low‑Noise EC Motor | EC (brushless DC) motors operate smoothly with inherently low acoustic emissions, making them a key element for quiet operation. |
| Acoustic Enclosure & Absorptive Materials | Installing sound‑absorbing foam or acoustic panels inside the fan housing significantly cuts radiated noise. |
| Vibration Isolation & Balancing | Use of elastic mounts and dynamic balancing of the rotating assembly minimizes mechanical vibration transmission to the housing, further lowering noise levels. |
What are the drive options for 160 series mini size centrifugal fans?
Drive Method Selection
1. Single-phase direct-drive AC motor (AC)
Simple structure, low cost, suitable for applications with low speed regulation requirements and strict reliability requirements.
2. Brushless DC external rotor motor (EC)
Utilizes an external rotor structure, directly coaxial with the impeller, resulting in higher efficiency, lower noise, and support for fine speed control via 0-10V or PWM.
3. Variable frequency drive (VFD)
Achieves wide-range speed regulation by adjusting the power supply frequency, suitable for systems requiring flexible airflow adjustment based on load changes.
4. Belt or coupling drive
For industrial applications requiring higher power or specific speed ratios, belt drives or couplings can be used to achieve flexible mechanical speed reduction/increase.
| Drive Type | Features & Suitable Applications |
| Single‑Phase Direct‑Coupled AC Motor | Simple construction, low cost; suitable for standard ventilation projects where noise requirements are moderate. |
| EC (Brushless DC) Motor | Integrated controller supports 0‑10 V or PWM speed control; offers low noise and high efficiency, ideal for applications demanding precise speed regulation and quiet operation. |
| External‑Rotor DC Motor | Very compact, high starting torque, and a wide speed range; fits extremely space‑constrained custom equipment. |
| Optional Variable‑Frequency Drive (VFD) | Paired with an AC motor, provides soft‑start, stepless speed control, further reducing noise and improving energy efficiency. |
How to achieve speed regulation for 160 series mini size centrifugal fans?
Technical path to achieve speed regulation
1. Variable frequency drive (VFD) speed control
Directly controls the frequency of the AC motor, achieving smooth adjustment from low speed to rated high speed, commonly used in HVAC and fresh air systems.
2.0-10V or PWM Control Signal
Provides analog voltage or pulse width modulation signals to the EC motor, enabling precise speed setting, suitable for integration into intelligent control systems.
3. Speed Control Valve in Response to Speed Regulation
While the fan is running at full speed, the system resistance is changed by adjusting pipeline valves, achieving indirect airflow regulation; this method is often used in conjunction with speed regulation.
4. Programmable Logic Controller (PLC) Linkage
Links fan speed regulation with data from sensors such as temperature and pressure to achieve automated airflow control, improving overall system energy efficiency.
Frequently Asked Questions (FAQ)
Q1: What are the installation methods for the 160 series mini size centrifugal fans?
A: They offer three installation methods: wall-mounted, flange connection, and direct embedded installation. They come with flexible flanges and vibration-damping brackets for easy and quick installation in ducts or cabinets.
Q2: What are the key maintenance points for this product?
A: Regularly check the lubrication of the impeller and motor bearings, clean the inlet and outlet filters, and monitor operating noise and vibration. If parts need to be replaced, original factory-issued universal parts can be used directly.
Q3: Do you support customization?
A: Customization is available based on customer requirements for airflow, pressure, noise, dimensions, and special materials (such as stainless steel and aluminum alloy). We provide customized motor power and control solutions.
Q4: What is the product quality and certification status?
A: The company has passed ISO 9001 quality management system certification. Our fan products comply with international standards such as CE, UL, and ISO 14001 environmental management system, ensuring reliable quality.
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