Drive technology

1. AC fan

Features :

Mature technology, simple and reliable structure

Low initial investment cost

Single speed or simple speed adjustment

Suitable for scenarios with stable operating conditions and low energy efficiency requirements.

Performance : Maximum airflow up to 8,000 CFM, noise level 55-65 dB

2. EC DC brushless fan

Features :

High efficiency, significantly more energy-efficient than AC motors

0-10V/PWM stepless speed regulation, precise control

Can be integrated with building management systems (BMS)

Low noise operation (50-55 dB)

Suitable for variable air volume (VAV) systems

Performance : Maximum airflow 5,000 CFM

V. High-efficiency energy-saving technologies

1. Three-dimensional flow high-efficiency energy-saving technology

The three-dimensional flow impeller design with a spiral blade layout can improve operating efficiency by more than 85% and save more than 15% of electricity compared with traditional fans.

Examples of energy-saving benefits :

1600kW installed wind turbine: annual electricity savings of 1.71 million kWh, resulting in electricity cost savings of 1.026 million yuan.

Emission reduction effect: Saves approximately 513 tons of standard coal per year and reduces CO₂ emissions by approximately 1,491 tons per year.

2. Customized design

Based on a three-pronged evaluation strategy of "mathematical model calculation + fluid dynamics simulation + database analysis", a fully customized wind turbine solution is achieved to maximize operating efficiency.

VI. Key Points for Selection

1. Determine performance requirements

Step 1: Calculate the required air volume

Determined based on workshop volume × air changes per hour (ACH)

Step 2: Calculate the system static pressure

Summing up all sources of resistance: duct length, elbows, valves, HEPA filters, heat exchangers, etc.

Step 3: Reserve a safety margin

A margin of 10-15% should be reserved for air volume and air pressure.

Considering factors such as filter clogging and pipe aging

2. Considering operating conditions

3. Parallel/Series Operation

When multiple units are connected in parallel, select fans of the same model and performance.

The value should be between 0.80 and 0.95 (the higher value should be used if the pipeline layout is reasonable).

Inlet and outlet flue pipes are equipped with baffles to prevent airflow interference.

VII. Installation and Maintenance

Installation Points

Basic requirements : The surface must be level and stable; vibration damping devices must be installed for installation on floors.

Connection method : The air inlet and the duct use a flexible connection (such as a canvas joint) to reduce vibration transmission.

Space requirements : Ensure the air inlet is free of obstructions and the air outlet duct is unobstructed.

Transmission methods : A/D/F type direct drive, B/C/E type variable speed drive

Operating Procedures

Before starting : Check if the impeller is stuck, if the bearing is adequately lubricated, and close the air inlet regulating valve.

Start-up : Start the motor under no-load conditions, and gradually open the valves to the working state after the speed stabilizes.

During operation : Monitor bearing temperature (≤80℃) and regularly clean impeller dust.

Product Classification

Based on their structural form and working principle, industrial fans are mainly divided into the following two categories:

1. Centrifugal fan

Centrifugal fans generate centrifugal force through impeller rotation, drawing gas in axially and discharging it radially. They are suitable for high static pressure and medium to large air volume scenarios.

Main features :

It has a wide pressure range, meeting requirements from low pressure to ultra-high pressure.

The efficiency is relatively high, especially with the backward-curved blade design, which can achieve an efficiency of over 85%.

Stable operation and relatively low noise

Suitable for complex working conditions such as dusty gases and high-temperature gases.

Classification by blade type :

2. Axial flow fan

Axial flow fans allow gas to enter and exit along the axial direction, resulting in large air volume and low air pressure, making them suitable for high-flow, low-resistance systems.

Main features :

Large air volume and compact structure

The motor is integrated inside the impeller, resulting in a small axial dimension.

Suitable for installations with limited space

The noise level is relatively high.

Application Comparison :

Industrial fans constitute one of the core pieces of equipment widely utilized in factories and enterprises, primarily serving functions such as ventilation, cooling, dust removal, material transport, and combustion support in industrial processes. Acting as the "heart" of industrial production systems, these fans circulate gases and materials throughout the entire system and are extensively applied across sectors including steel metallurgy, petrochemicals, electric power, mining, and cement and building materials. In terms of energy consumption, industrial fans account for over 30% of an enterprise's total electricity usage; consequently, the selection of high-efficiency, energy-saving fans is of paramount importance for reducing operational costs.