Choosing a premium Cold Room Evaporator is a critical decision for any installation. It directly impacts temperature stability, energy efficiency, and product shelf life. Shanghai Heleng Refrigeration and Electromechanical Equipment Co., Ltd. (HELENG) designs and manufactures state-of-the-art unit coolers. Our equipment meets the rigorous demands of commercial and industrial applications. Backed by the Luohe Tian Shun Cold Chain Group, we operate a 5,000-square-meter intelligent manufacturing base. This allows us to supply high-performance thermal management equipment globally.
As a leading supplier, we deliver comprehensive refrigeration solutions across multiple critical sectors. These include food processing, cold chain logistics, supermarkets, and biopharmaceutical laboratories. Whether you are building an agricultural facility or a regulated pharmaceutical warehouse, our equipment excels. Our evaporators provide the precise temperature and humidity control necessary to safeguard your valuable inventory.
To accommodate diverse thermal demands, HELENG provides a comprehensive selection of industrial air coolers. These are designed for specific temperature ranges and operational environments. By aligning our models with your application needs, we guarantee optimal heat exchange efficiency and minimized frost build-up.
Engineered for high-temperature applications, the DL Series is ideal for fresh produce warehouses, supermarkets, and dairy storage. Featuring an optimized 4.5mm fin spacing, these units maximize heat transfer efficiency. They also maintain the high relative humidity levels required to prevent fresh foods from drying out. These systems operate quietly to keep energy consumption minimal during prolonged chilling cycles.
The DD Series is our flagship freezer room air cooler line. It is tailored for medium-to-low temperature storage of meats, seafood, and frozen foods. Built with 6.0mm fin spacing, these units drastically reduce frost accumulation on the coils. This extends the intervals between defrost cycles. Each unit includes embedded electric defrost heaters for rapid, even clearing.
For demanding rapid-freezing environments, the DJ Series delivers heavy-duty performance. Designed with ultra-wide fin spacing from 9.0mm to 12.0mm, these units prevent immediate frost blockages. They perform reliably even under extreme moisture and temperature differentials. Capable of heat exchange capacities exceeding 100kW, the DJ series ensures rapid core-temperature reduction.
In environments where personnel work alongside refrigeration systems, standard unit coolers can cause discomfort. Our dual-discharge, low-velocity evaporators solve this issue for food prep areas and clean rooms. They distribute air gently along the ceiling in two directions. This ensures exceptionally uniform temperature distribution and a low-noise, draft-free workspace.
| Series / Model Type | Target Temp Range | Fin Spacing | Optimal Applications | Standard Defrost Method |
|---|---|---|---|---|
| DL Series | 0°C to +10°C | 4.5 mm | Fresh produce, dairy, supermarkets, flower storage | Air Defrost / Electric Defrost |
| DD Series | -15°C to -25°C | 6.0 mm | Frozen meat, seafood, frozen convenience foods | Electric Defrost (Stainless Steel Heaters) |
| DJ Series | -25°C to -40°C | 9.0 mm to 12.0 mm | Blast freezing tunnels, rapid freezing chambers | Electric, Hot Gas, or Water Defrost |
| Dual-Outlet | +2°C to +15°C | 4.5 mm to 6.0 mm | Food processing workrooms, laboratories, clean rooms | Air Defrost / Electric Defrost |
For maximum operational reliability, refrigeration components should never be selected in isolation. HELENG serves as your complete, one-stop project partner. We manufacture both condensing units and high-performance cold room evaporators. Our engineering team ensures that coils, expansion valves, and compressor capacities are perfectly balanced. This eliminates common issues like excessive suction pressure drop and liquid slugging.
Implementing our integrated cold storage solutions offers significant advantages. Contractors and facility operators enjoy simplified installation, seamless commissioning, and lower energy bills. Every pair of matched units operates at peak coefficient of performance (COP). This guarantees stable temperatures even during high-load product loading cycles.
We believe in absolute technical transparency. HELENG evaporators are constructed in our state-of-the-art facility utilizing precision manufacturing techniques. This ensures our products withstand the test of time in demanding industrial environments.
Our heat exchangers feature high-quality Ø9.52mm and Ø12mm internally grooved copper tubes. The internal grooving increases the inner surface area. This dramatically enhances the refrigerant-side heat transfer coefficient. Advanced mechanical tube expansion achieves tight metal-to-metal contact between tubes and aluminum fins. For highly corrosive environments, we offer optional hydrophilic or epoxy-coated aluminum fins. These options prevent oxidation and prolong coil life.
The protective housing of our air coolers is built for durability. Customers can select from several heavy-duty casing options depending on the operating environment. We offer powder-coated galvanized steel for excellent standard protection and mechanical strength. High-grade aluminum alloy is also available, which resists rust and reduces overall unit weight. For sanitary environments like meat processing, we provide SUS304 or SUS316 stainless steel casings.
To prevent ice build-up and water damage during defrosting, each unit features a double-insulated drip tray. This tray includes diamond-angled drainage paths to ensure rapid and complete water removal.
Air movement is powered by industry-leading external rotor axial fans. These are engineered for low-temperature reliability, high airflow throw, and minimal noise. To clear frost efficiently, we offer three tailored defrosting methods. These include high-insulation stainless steel electric heaters and water defrost systems for large facilities. We also offer highly efficient hot gas defrosting utilizing heat rejected from the compressor cycle.
No two refrigeration projects are identical. That is why HELENG offers robust OEM/ODM and customization services for global contractors and developers. Having successfully served over 300 clients worldwide, we have a proven track record. We are widely recognized as a trusted custom refrigeration equipment manufacturer capable of delivering tailor-made cooling solutions.
Our in-house R&D team works closely with your engineers to provide comprehensive project support. We assist with initial CAD layout designs and precise thermal calculations. We also offer tailored fin spacing and custom coil sizes to fit constrained overhead spaces. Whether you need GMP-compliant units or equipment for a massive logistics center, we deliver. We provide the engineering excellence to meet your exact specifications.
Fin spacing selection relates directly to your target operating temperature and humidity. For high-temperature chiller rooms, a tighter 4.5mm spacing maximizes surface area and heat transfer. Low-temperature storage requires a wider 6.0mm spacing to prevent frost blockages. In extreme blast freezer applications, we utilize ultra-wide fin spacing of 9.0mm to 12.0mm. This ensures uninterrupted airflow despite rapid frost accumulation.
We provide three primary defrosting configurations depending on your system design. Our standard units utilize highly efficient electric defrosting with embedded stainless steel heating rods. For larger commercial facilities, we offer water defrost systems for exceptionally rapid clearing cycles. Finally, we can design hot gas defrost systems that divert warm refrigerant to the evaporator. This offers excellent energy efficiency and lower operating costs.
Yes, we offer specialized material upgrades for corrosive or high-sanitation environments. We can configure our cooling units with marine-grade SUS304 or SUS316 stainless steel casings. We also offer epoxy-coated or hydrophilic aluminum fins and anti-corrosive copper tube protection. These robust options protect the equipment against saltwater spray, acidic juices, and aggressive chemical sanitizers.
Absolutely. To minimize on-site labor and ensure flawless commissioning, HELENG pre-configures our units. We can install genuine expansion valves, solenoid valves, and pre-wired waterproof junction boxes at the factory. This turnkey approach ensures the evaporator arrives ready for rapid piping and electrical connection. It maintains complete system integrity and reduces installation errors.
Ready to upgrade your refrigeration system? Please contact our refrigeration specialists today. Discuss your project requirements with a leading Cold Room Evaporator manufacturer and secure the optimal solution for your facility.
