Cold Storage Evaporator Fan — XN-EV Series Industrial Unit Cooler for Walk-in Freezer & Cold Room Applications
Engineered for reliable, energy-efficient air circulation in commercial cold storage facilities. Multi-voltage compatible, corrosion-resistant construction, CE & ISO certified.
XNAIR XN-EV Series Evaporator Fans are purpose-built for walk-in freezers, cold storage warehouses, and food processing cold rooms. Each unit integrates high-efficiency copper-tube aluminum-fin coils, externally wound fan motors (IP54 rated), and a hot-dip galvanized steel casing. With selectable fin spacing (4mm for medium-temp, 6-8mm for low-temp frost-prone environments), multi-standard voltage compatibility, and factory-balanced fan assemblies, the XN-EV series delivers consistent airflow performance across diverse climatic conditions.
Fig. 1 — XNAIR XN-EV unit installed in a pharmaceutical-grade cold room (2–8°C) for vaccine storage. The corrosion-resistant housing and low-noise fan design meet stringent GMP environmental requirements.
Technical Specifications
| Parameter | XN-EV200 | XN-EV350 | XN-EV500 |
|---|---|---|---|
| Nominal Airflow | 2,200 m³/h (1,295 CFM) | 6,800 m³/h (4,002 CFM) | 18,500 m³/h (10,890 CFM) |
| Cooling Capacity (ΔT=8K) | 4.2 kW (14,330 BTU/h) | 12.8 kW (43,680 BTU/h) | 35.6 kW (121,470 BTU/h) |
| Fan Diameter × Qty | 250 mm × 1 | 350 mm × 2 | 500 mm × 3 |
| Fin Spacing Options | 4 / 6 / 8 mm | 4 / 6 / 8 mm | 6 / 8 mm |
| Applicable Temperature | -18°C to +5°C | -25°C to 0°C | -25°C to -5°C |
| Coil Material | Copper Tube / Aluminum Fin | Copper Tube / Aluminum Fin | Copper Tube / Aluminum Fin |
| Casing Material | Hot-dip galvanized steel with epoxy powder coating (SS304 optional) | ||
| Motor Rating | IP54, Class F insulation | IP54, Class F insulation | IP54, Class F insulation |
| Voltage Options | 220-240V / 1Ph / 50Hz | 380-440V / 3Ph / 50Hz | 208-230V / 1Ph / 60Hz | 460V / 3Ph / 60Hz | ||
| Refrigerant Compatibility | R404A, R448A, R449A, R452A, R290 (special request) | ||
| Sound Level @ 1.5m | ≤ 58 dB(A) | ≤ 65 dB(A) | ≤ 72 dB(A) |
Global Adaptability — Engineered for Diverse Operating Environments
XNAIR evaporator fans are configured at the factory to match the specific climatic, regulatory, and logistical requirements of each destination market. Below are the three most common deployment scenarios our engineering team addresses.
Africa & Middle East — High Ambient Temperature
For cold rooms operating in ambient temperatures exceeding 45°C, we upsize the condenser-matching coil surface by 15-20% and apply a UV-stabilized epoxy coating on the external casing. Motors are wound with high-temperature insulation varnish to sustain continuous duty cycles without thermal cutout. Fin spacing defaults to 8mm to reduce dust clogging in arid environments.
Europe & North America — Regulatory Compliance & Low-GWP Refrigerants
Units destined for EU and North American markets are pre-configured for low-GWP refrigerants (R448A, R449A) and come with CE marking documentation and UL-recognized motor components. Electrical panels include phase-sequence protection relays as standard. All pressure vessels comply with PED 2014/68/EU directives where applicable.
Southeast Asia & South America — High Humidity & Corrosion Resistance
In coastal and tropical regions with relative humidity above 85%, we recommend the SS304 stainless steel casing option and apply a marine-grade anti-corrosion coating on all copper joints. Fan blades receive an additional electrophoretic coating to resist salt-laden air corrosion. All electrical terminals are sealed with silicone gaskets to prevent moisture ingress.
Fig. 2 — Export packaging: Each XN-EV unit is secured in a fumigated plywood crate with internal cross-bracing and shock-absorbing foam. Tilt and moisture indicators are affixed to every crate for supply chain integrity monitoring.
Engineering Details — Materials, Safety & Construction
Every XNAIR evaporator fan is built with an emphasis on thermal efficiency, structural rigidity, and serviceability. The following design features are standard across the XN-EV series:
- Copper Tube / Aluminum Fin Coil: Internally grooved copper tubes (Ø12.7mm) with hydrophilic aluminum fins enhance heat transfer while reducing condensation droplet retention.
- Hot-Dip Galvanized Casing: 1.2mm thick Z275 galvanized steel panels with epoxy powder topcoat provide a durable barrier against corrosion, even in high-humidity cold room environments.
- IP54 Fan Motors: Externally wound, permanently lubricated ball-bearing motors with thermal overload protection. Designed for 30,000+ operational hours under normal duty cycles.
- Adjustable Fan Guards: Powder-coated steel wire guards with spacing ≤12mm per ISO 13857 safety standards, removable for coil cleaning access.
- Drain Pan with Integrated Slope: Factory-installed stainless steel drain pan with a 3° slope toward the drain connection to prevent standing water and bacterial growth.
- Expansion Valve Ready: Pre-brazed distributor with equal-length capillary tubes ensures uniform refrigerant distribution across all coil circuits, compatible with TEV or EEV systems.
Fig. 3 — Engineering cross-section: This diagram illustrates the internal coil geometry, fin spacing configuration, and airflow path through the XN-EV evaporator. The generous coil face area minimizes air-side pressure drop for energy-efficient operation.
Target Application Scenarios
XNAIR evaporator fans serve a wide range of industrial cold chain applications. Each sector demands specific performance characteristics, which the XN-EV series addresses through configurable fin spacing, motor ratings, and casing materials.
Cold Storage Warehousing & Distribution
Large-volume cold rooms (500–10,000 m³) for frozen goods storage at -18°C to -22°C. Our high-airflow models (XN-EV500) with 8mm fin spacing reduce defrost frequency in these demanding, continuously operating facilities.
Food Processing & Cold Chain Logistics
Blast chillers, meat processing rooms, and dairy cold stores requiring rapid pull-down. Medium fin spacing (6mm) balances heat exchange efficiency with manageable defrost intervals in high-moisture environments.
Pharmaceutical Cold Chain & Medical Storage
Temperature-sensitive vaccine and biologic storage at 2–8°C. SS304 casing and 4mm fin spacing ensure precise temperature uniformity and easy sanitation per GMP guidelines.
Frequently Asked Questions
For low-temperature applications below -18°C, we recommend 6mm to 8mm fin spacing. Wider spacing minimizes frost accumulation between fins, extending the interval between defrost cycles and maintaining stable airflow. In blast freezing rooms where heavy frost is expected, 8mm is the standard specification. For medium-temperature cold rooms (0°C to +5°C), 4mm spacing provides optimal heat transfer efficiency.
Yes. All XNAIR evaporator fan motors can be factory-configured for 60Hz / 208-230V / 1Ph or 460V / 3Ph power supplies commonly used in North American markets. Motors are UL-recognized components, and the complete assembly is pre-wired with the specified voltage and frequency upon order confirmation. Please specify your electrical requirements when requesting a quotation to ensure correct motor selection.
Each unit is individually packed in a fumigated export-grade plywood crate (ISPM-15 compliant) with internal bracing, corner protectors, and shock-absorbing EPE foam padding. Copper coil connections are capped with plastic thread protectors, and fan blades are secured with dedicated brackets to prevent rotation during transit. All crates carry tilt-watch indicators and humidity detection cards for supply chain quality assurance.
Standard lead time is 25–35 days for a 20ft container order (typically 24–48 units depending on model mix). Custom fin spacing or non-standard voltage configurations may add 5–7 working days. We provide weekly production progress updates with photos of your units on the assembly line. Express air-freight options are available for urgent orders at an additional cost.
Fig. 4 — Factory quality control: Every XN-EV unit undergoes a full-load run test before shipment. Technicians verify coil leak integrity (nitrogen pressure test at 2.8 MPa), fan balance, electrical insulation resistance, and drainage performance.
Quality Assurance & Industry Certifications
Every XNAIR cold storage evaporator fan undergoes a rigorous pre-shipment testing protocol to ensure field reliability. Our factory in Shanghai, China, operates under ISO 9001:2015 certified quality management systems. Before crating, each unit passes the following mandatory checks:
- Coil Leak Test: Nitrogen pressure test at 2.8 MPa for a minimum of 30 minutes with electronic leak detection.
- Fan Balance & Vibration: Dynamic balancing to ISO 1940 G6.3 grade; vibration amplitude measured at all mounting points.
- Electrical Safety: Insulation resistance ≥100 MΩ at 500V DC; dielectric strength test at 1500V AC for 60 seconds.
- Drainage Verification: Water-flow test confirming complete drainage within 90 seconds with no standing water retention.
- Run Test: Continuous operation at rated voltage for 2 hours, monitoring current draw, noise level, and temperature rise.
