DC Backward Curve Centrifugal Fan

A DC centrifugal fan is a mechanical device with rotating impellers from which it draws kinetic energy to push out the air in a particular direction. It has a housing or an enclosure which helps maintain the direction of the outgoing air or gas. The kinetic energy of the rotating impellers increases the speed and volume of the outgoing stream of air or gas. These fans are also known as centrifugal blowers. The feature that distinguishes them from axial fans is the pressure ratio. When we say DC or direct current, the flow of electric current is unidirectional unlike AC fans. Longwell Technology is a designer, manufacturer and distributor of high quality, cost effective , RoHS, certified DC centrifugal fans.

Model no.: LWBD 24/48V Series

Impeller SIZE: 175mm - 400mm (diameter )

Features:

Motor: BLDC Motor

Bearing Type: Ball Bearing

Impeller Material: Propylene with Glass-Fiber / Galvanized Sheet steel / Sheet aluminium.

Operating Temp: -25°C~+60°C

Voltage: 24V/48V

Type of protection: IP54, IP44

Certification: CE, UL, RoHS, CCC, ETL, etc

Advantages

-High efficiency, long life span

-Tech output, locked-rotor protection, reverse polarity, over-voltage protection, soft start protection,

-Compact design which can replace German fans directly.

-Support 0-10 vdc or pwm speed control.

Click on the model below for specifications, and Order Online

Types of DC Centrifugal Fans

Forward curved and backward curved centrifugal fans are two common types of fans used in various applications. They differ in their design and performance characteristics.

Forward Curved Centrifugal Fans:

Forward curved centrifugal fans, also known as squirrel cage fans, are widely used in various applications due to their efficiency and compact design. These industrial squirrel cage fans consist of a series of blades that curve in the direction of the fan's rotation. The blades are typically narrow at the entrance and widen towards the outlet, creating a curved shape resembling a hamster wheel or squirrel cage. However, forward curved fans have some limitations. They are less efficient than backward curved fans when it comes to handling higher pressure loads. Due to the shape of the blades, they can be prone to wear and damage if exposed to abrasive or dusty environments. It's important to consider these factors when selecting a fan for a specific application.

Backward Curved Centrifugal Fans:

Backward curved centrifugal fans, also known as backward inclined fans, are widely recognized for their high efficiency and ability to handle high-pressure loads. Unlike forward curved fans, the blades of backward curved fans curve away from the direction of rotation, resembling a paddle or the shape of a turbine blade. Backward curved fans are known for their energy efficiency. The aerodynamic design of the blades helps to reduce turbulence and increase airflow, resulting in improved overall system performance and reduced energy consumption. These fans are often equipped with backward curved impellers that are balanced to minimize vibration and noise, providing smooth and quiet operation.

Applications of industrial DC Centrifugal Fans

DC centrifugal fans are suitable for high-pressure applications. They find applications in the following areas:

• HVAC Systems: Industrial DC centrifugal blower ensure efficient air circulation and temperature control in commercial buildings, factories, and data centers, improving indoor air quality and comfort.
• Dust and Fume Extraction: Industrial DC centrifugal fans remove hazardous particles and pollutants, ensuring air quality and worker safety in industries such as woodworking, metal fabrication, chemical processing, and mining.
• Drying and Cooling Processes:This high speed centrifugal blowers facilitate drying and cooling in industries, aiding moisture evaporation in materials and dissipating heat from equipment in applications such as food processing, textiles, and ceramics.
• Air Pollution Control Systems: These Industrial centrifugal blower fans play a crucial role in air pollution control systems, helping to remove particulate matter, gases, and VOCs before they are discharged, enhancing environmental sustainability in industrial processes.
• Automotive and Aerospace Industry: DC centrifugal blower fans are essential for cooling engines and components, maintaining optimal temperatures in vehicles, aircraft, and spacecraft, ensuring efficient performance and preventing overheating.
• Energy Generation: These fans enhance power generation efficiency in conventional and renewable energy plants by facilitating cooling air or gas circulation around turbines, generators, and heat exchangers, optimizing energy production.
• Electronics and IT Cooling: These high speed centrifugal fans prevent overheating in data centers and electronics manufacturing facilities, ensuring proper airflow and heat dissipation, safeguarding the performance and longevity of sensitive electronic equipment.
• Cleanrooms: Industrial DC centrifugal blower maintain controlled air quality, pressure, and particle filtration in cleanrooms for pharmaceuticals, semiconductor manufacturing, and biotechnology, creating sterile environments for sensitive processes.

Mainly applications: HVACR ventilation systems, air purifier, air cleaner, AHU, FCU, etc

DC motors are around 30% more efficient than AC motors because the secondary magnetic field comes from permanent magnets rather than copper windings. An AC motor consumes additional energy solely to create a magnetic field by inducing a current in the rotor. But this is only half the story. The use of modern electronics in controlling the motor has opened up many other possibilities which contribute to using less power.

Construction:

Cowls are of galvanised steel construction.

Impellers are backward-curved centrifugal design and are of high performance composite material.

Bird-mesh guards are an optional extra.

Powder-coating is an optional extra.

FAQ:

1, Are the manufacturer ?

Yes, LONGWELL is a professional manufacturer which is the specialist in HVACR fans, motor and components for the applications of air conditioner, air ex-changer, coolers, heaters, floor convectors, sterilization purifier, air purifiers, medical purifiers, and ventilation, energy industry, 5G cabinet ...

2, Whats your production capacity ?

We are capable to produce over millions pcs fans and motors annually.

3, Where is our main market?

North America, Europe some of longwell customers are the top 1 in their application.

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