Application Scenarios
● Hazardous areas with explosive gas mixtures: Zone 1, Zone 2.
● Explosive gas mixtures: IIA, IIB, IIC.
● Hazardous areas with explosive dust: Zone 20, Zone 21, Zone 22.
Product Introduction
● The explosion-proof roof-top air conditioning unit is a full-air system, integrating cooling and heating (options include heating, humidification, filtration, etc.) functions into one unit.
● It features multiple models. This roof-top unit series integrates direct expansion combined air handling and air-cooled heat pump technologies, offering advantages such as centralized comprehensive control for cooling and air conditioning.
● Characteristics include high efficiency, energy savings, simple system, and stable performance. Sophisticated microprocessor control ensures optimal control of air performance and quality. The air handling section employs a thermal break concept design for all functional segments.
● The compression/condensing section utilizes a modular panel assembly method, offering mature technology, flexible design, diverse functional segment combinations, easy installation, and simple control.
● This air conditioner series offers a wide and precise temperature control range.
● Various configurations are available, including integrated fresh air, split fresh air, integrated return air, and split return air models. The functional segments of the indoor unit can be selected as needed.
Product Features
● Explosion-proof marking: Ex d ib mb IIB T4 Gb, Ex d ib mb IIC T4 Gb.
● Manufactured with advanced explosion-proof design and process to ensure superior, safe, and reliable explosion-proof performance.
● The casing employs a thermal break concept design, featuring a smooth interior and low air leakage rate.
● The microprocessor controller includes multiple automatic control functions such as fault diagnosis, intelligent defrosting, energy management, and operation monitoring.
● Major components of the refrigeration and electrical systems use internationally renowned brand products, ensuring stable quality and effective protection for unit operation.
● The unit is equipped with multiple protections including high/low pressure, overload, phase loss, and reverse phase, ensuring safe unit operation.
Notes:
1. Cooling capacity test conditions: Inlet air dry-bulb temp. 27°C, wet-bulb temp. 19°C; Outdoor ambient dry-bulb temp. 35°C.
2. Heating capacity test conditions: Inlet air dry-bulb temp. 20°C; Outdoor ambient dry-bulb temp. 7°C, wet-bulb temp. 6°C.
3. Unit operating ambient temperature range: -7~43°C. Auxiliary heating is used when the outdoor ambient dry-bulb temperature is between -7°C and 0°C.
4. The external static pressure value is standard. Non-standard customization is available if users have special requirements
CNWINNEX explosion-proof systems are widely deployed in oil & gas, petrochemicals, pharmaceuticals, ports & terminals, mining, power generation, offshore platforms, and other areas where flammable gases or dusts are present. Typical applications include control room climate control, hazardous area logistics and access management, video surveillance & security, pressurized analyzer shelters, robotic inspection, as well as custom explosion-proof enclosures and system integration.
An explosion-proof air conditioner is a specialized HVAC unit designed for hazardous environments where flammable gases, vapors, or combustible dusts are present (e.g., petrochemical plants, gas stations, paint booths, pharmaceutical labs).
The most critical difference from a standard air conditioner lies in “active ignition prevention.” Standard units generate tiny sparks during normal operation – such as when relays open/close, compressors start/stop, or circuits make/break. While safe in normal air, these sparks can be deadly in an explosive atmosphere.
CNWINNEX’s explosion-proof design is based on the T4 temperature class. For high-temperature regions such as the Middle East or areas with extreme summer heat, we offer custom units rated for ambient temperatures up to 60°C (140°F) , ensuring reliable operation without overload in harsh tropical climates. For cold regions, we offer custom units rated for ambient temperatures as low as -50°C (-58°F) , guaranteeing safe operation in extreme arctic conditions.
The explosion-proof rating of CNWINNEX air conditioners is:
Ex 2 G D Ex db ib mb IIB T4 Gb / Ex 2 G D Ex db ib mb IIC T4 Gb / Ex ib mb tb IIIC T130°C Db
●For Gas (G): Ex db ib mb IIC T4 Gb
Suitable for IIC gas groups (including hydrogen, acetylene, etc.), using flameproof (db), intrinsic safety (ib), and encapsulated (mb) combined protection. Temperature class T4 (max surface temperature ≤135°C), Equipment Protection Level Gb.
●For Dust (D): Ex ib mb tb IIIC T130°C Db
Suitable for IIIC conductive dusts, using intrinsic safety (ib), encapsulation (mb), and dust-tight (tb) protection. Maximum surface temperature 130°C, Equipment Protection Level Db.
CNWINNEX products comply with international explosion-proof certification standards such as ISO, CNEX, ATEX, IECEx, SAA, EAC, ensuring safe use in different countries and regions., and BV or DNV (for offshore applications) . Depending on the product type and zone classification, we offer various protection concepts including Ex d, Ex e, Ex ib, and Ex nA, with ingress protection up to IP66/IP67, ensuring safe and compliant operation in hazardous environments worldwide.
Absolutely. Explosion-proof Custom Engineering is our sixth core business. From non-standard Ex components (special material junction boxes, intrinsically safe sensors, etc.) to integrated Ex systems (skid-mounted control rooms, pressurized cabins, legacy equipment retrofitting), we provide full-process custom services covering conceptual design, 3D simulation, compliance certification, manufacturing, and delivery. Simply share your operating parameters and functional needs, and we will engineer a dedicated explosion-proof safety solution for you.
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