Types and Uses of Explosion-proof Fan Coil Units

A防爆风机盘管 is a specialized air conditioning unit designed for flammable, explosive, and other hazardous environments. It combines the refrigeration/ heating functions of a fan coil with explosion-proof safety features. Below is a detailed explanation of its main types and applications:

Type of explosion-proof fan-coil units

1. Categorized by structural forms

• Horizontal installation, suitable for suspended ceilings or confined spaces (such as petrochemical plants, warehouses).

• Vertical: Installed vertically, typically placed against a wall (e.g., in laboratories, pharmaceutical factories).

• Carded (Embedded): Hidden within the ceiling, it offers aesthetics and space-saving benefits (e.g., in high-blast-proof cleanrooms).

• Ex d (Explosion-proof): The housing can withstand internal explosions without spreading (e.g., gas stations, oil depots).

• Ex e (Intrinsically Safe): Enhanced safety measures to prevent sparks (e.g., in chemical workshops with reduced dust).

• Ex ib (Intrinsically Safe): Low-power circuit, suitable for minor hazard areas (such as laboratory analysis zones).

• Single-cooling Type: Cooling only, used for high-temperature environments (such as foundry workshops).

• Cooling/Heating Type: Supports cooling/heating mode switch (e.g., explosion-proof factory buildings in northern regions).

• New Air Model: Integrated new air exchange function (such as underground mines, enclosed work areas).

• Corrosion and Explosion-Proof Type: The housing is made of stainless steel or coated materials, offering corrosion resistance (such as offshore platforms, chemical factories).

• High-pressure model: High wind pressure, suitable for long-distance air supply (e.g., large explosion-proof warehouses).

Main Applications

1. Petroleum & Chemical Industry

• Application Scenarios: Refineries, chemical plant reaction workshops, and storage areas.

• Function: Adjusts humidity and temperature, eliminates flammable gases; explosion-proof rating typically requires Ex dⅡBT4 or higher.

• Application Scenarios: Mine tunnels, gas drainage stations.

• Explosion-proof and moisture-proof, must comply with coal mine safety standards (such as MA certification).

• Application Scenarios: Explosion-proof Cleanroom, Alcohol Extraction Room.

• Feature: Requires stainless steel material to prevent bacterial growth.

• Application Scenarios: Gunpowder production workshops, fuel warehouses.

• Special requirements: High-precision temperature control, explosion-proof while resistant to electromagnetic interference.

• Paint spray workshops, dust explosion environments (flour mills, aluminum powder processing), etc.

III. Selection Considerations

1. Ensure explosion-proof ratings: Select the corresponding Ex rating based on the type of gas/dust in the environment.

2. Material Compatibility: For corrosive environments, choose 304 stainless steel or fluocarbon coating for the shell.

3. Airflow Calculation: Determine the model based on the space volume and the number of air changes to avoid over-sizing or under-sizing.

4. Certification Compliance: Ensuring passage of national explosion-proof certification (such as CNEx, ATEX, IECEx).