Introduction to the Functions of Explosion-Proof Modular Air Handling Units

(1) Fresh Air/Return Air Mixing Section

(2) Filter Section

(3) (Fresh) Exhaust Air Section (Also Known as Flat-Top Air Distribution Mixing Section)

(4) Intermediate Section (Maintenance Section)

(5) Secondary Return Air Section

(6) Surface Cooling Section

(7) Heating Section

(8) Energy Recovery Section

(9) Supply Air Fan Section

• Type A and Type S Supply Air Fan Sections: These adopt a horizontal air supply mode. A flexible hose is installed at the fan outlet, and a spring vibration-damping steel frame is set at the bottom, resulting in low vibration. The section can be installed and operated on the floor. The fan of this air handling unit is a high-efficiency double-inlet centrifugal explosion-proof fan.
• Type H Supply Air Fan Section: This is a supply air fan section with a top vertical upward air supply mode. A connecting flange is installed on the top, and the fan is treated with advanced anti-static technology.

(10) Humidification Section

• Dry Steam Humidifier: It has three control methods: manual (Model SZS), pneumatic (Model QZS), and electric (Model DZS). This humidifier features fast humidification, no water droplets, low operating costs, and good humidification effect, and is suitable for places with a steam source.
• High-Pressure Spray Humidification: It uses a direct-coupled high-pressure pump to pressurize water to 0.35 MPa, making the water flow through a new type of nozzle to spray water mist, thereby achieving the humidification effect. Its characteristics include high atomization efficiency (the average particle size SMD of the mist droplets measured by an MZVCM laser particle analyzer is 38.6 μm), so it has a large humidification capacity and fast humidification speed. Its humidification efficiency is five times higher than that of similar water-spraying chamber humidifiers. It consumes less electricity, is equipped with a built-in water filtration device, and is simple to use and maintain. It is especially suitable for places without a steam source for humidification.

(11) Noise Reduction Section

(12) Electric Heating Section

(13) Air Distribution Section

(14) Air Outlet Section

(15) Maintenance Section

Product Features

1. Explosion-Proof Performance

   Advanced explosion-proof technology is adopted to ensure safer and more reliable explosion-proof performance. The explosion-proof marks are Exdibmb II BT4 Gb and Exdibmb II CT4 Gb.
2. Modular Structure

   The unit adopts a popular panel structure in appearance, with panels being modular double-layer sandwich panels and the core material being polyurethane. The cross-section of the unit can be made into various types according to design needs, meeting the application requirements of different occasions. Due to the adoption of a buckle locking structure, all panels are flush-connected, with a continuous and flat surface, and the appearance is smooth and seamless.
3. High Air Tightness

   High-elastic sealing strips are used for surface sealing between panels and frames, as well as between other connecting parts. This ensures that the air leakage rate of the cabinet meets the requirements specified for clean air conditioners in the GB/T 14294-1993 standard. It has good thermal insulation performance and prevents condensation.
4. Good Corrosion Resistance

   High-quality color-coated steel plates, galvanized steel plates, cold-rolled steel plates, and section steels are used, which undergo phosphating and electrostatic painting treatments. Fasteners such as bolts, nuts, and self-tapping screws are all treated for corrosion resistance.
5. Diversified Heat Exchanger Designs

   Diversified designs of heat exchangers in terms of fin type, fin pitch, circuit, and number of rows can meet the thermal performance requirements of different occasions.
6. Dry Water Pan

   The water pan is sloped in shape, ensuring smooth discharge of condensed water and keeping the water pan in a dry state at all times. This minimizes factors harmful to health.
7. Low-Noise and Energy-Saving Type

   High-efficiency, low-noise double-inlet centrifugal explosion-proof fans are adopted. All fans undergo strict dynamic and static balance tests, with types including forward-curved multi-blade type, backward-curved arc type, and backward-curved airfoil type. The fan type is selected reasonably based on parameters such as air volume, air pressure, noise, and power. Additionally, the fans are treated with advanced anti-static technology.
8. Easy Installation

   All functional sections are connected on-site using clamping devices and bolts, which reduces assembly time. Moreover, they can be assembled on-site from scattered parts according to user requirements.
9. Easy Maintenance

   Each functional section of the cabinet is equipped with specially designed plastic-steel maintenance doors with good air tightness. Meanwhile, the buckle locking structure is adopted, making opening and closing very convenient for the maintenance of internal components of the unit.
10. Special-Purpose Units

    According to engineering requirements, the unit can be made into special-purpose units for outdoor use, clean workshops, pharmaceutical factories, hospital operating rooms, and microelectronics rooms.
11. Mechatronics Integration

    Frequency converters, fan starters, and automatic control devices can be added as required to realize energy-saving operation of the unit throughout the year. Additionally, a communication interface is provided for connection with the building automation system to achieve network group control.