DD Series Floor Coolers — WKDL Dual-Discharge Evaporators

Struggling to Get Even Airflow Across a Wide Freezer Room?

Ceiling-mounted coolers lose throw distance in rooms wider than 10–12 metres, creating warm spots that compromise product quality and trigger temperature alarms. The WKDL DD Series floor-mounted evaporators solve this with dual-discharge air throw reaching up to 25 metres, purpose-built for large, wide freezer rooms operating between −18 °C and −35 °C.

WKDL DD Series — Floor-Mounted Dual-Discharge Evaporators

The DD Series is engineered for large-format frozen storage where uniform temperature distribution is non-negotiable. Twelve models deliver cooling capacities from 3.5 kW to 35.0 kW, with dual-side air discharge creating a symmetrical airflow pattern that eliminates the dead zones common in wide rooms. Floor mounting also simplifies installation — no structural ceiling reinforcement required.

Construction uses copper tube / aluminium fin coils with 6 mm or 9 mm fin spacing optimised for low-temperature, low-humidity operation. Hot-gas defrost is standard on all DD models above 8 kW; electric defrost is standard on smaller models. Heavy-gauge galvanized steel casings with epoxy powder coat withstand the thermal stress of daily defrost cycles at −35 °C.

The DD line is the preferred choice for frozen meat warehouses, ice cream distribution centres, seafood blast-holding rooms, and cold chain 3PL operators throughout Southeast Asia, the Middle East, and Latin America.

Key Specifications

CE (Manufacturer’s Declaration)
Manufacturer’s ISO 9001

• Operating Temperature — −18 °C to −35 °C
• Cooling Capacity Range — 3.5 kW (DD-35) to 35.0 kW (DD-350)
• Air Discharge — Dual-side horizontal throw, 12–25 m effective range
• Coil Construction — Copper tubes, hydrophilic aluminium fins
• Fin Spacing — 6 mm / 9 mm (low-temp optimised)
• Defrost Method — Electric (≤8 kW) / Hot-gas (>8 kW standard)
• Fan Motor — External rotor, IP54, 380 V 3-phase 50 Hz
• Refrigerants — R404A, R507A, R22, R744 (CO₂ cascade compatible)

Model Range

DD (Floor) vs DL (Ceiling) — Which Do You Need?

Rule of thumb: If your freezer is wider than 8 metres and operates below −18 °C, the DD Series delivers the air throw and capacity you need. For rooms under 8 m wide or above −18 °C, the ceiling-mounted DL Series is more space-efficient.

Common Applications

• Large frozen meat storage warehouses (−25 °C) with room spans of 15–30 m
• Ice cream and frozen dairy distribution holding rooms (−28 °C)
• Seafood processing facility blast-holding zones (−30 °C to −35 °C)
• 3PL cold chain logistics centres with multi-chamber frozen storage
• Industrial frozen food packaging and palletizing areas

Recent Supply Example

A frozen seafood processor in Vietnam ordered 8 × DD-150 units for two new 1,200 m² freezer rooms operating at −28 °C. Units included hot-gas defrost valves and stainless steel drip pans. Delivered within 22 days FOB Ningbo at approximately USD 2,400 per unit. Total project value: ~USD 19,200.

Why Source Through hicool?

• Direct factory pricing — typically 30–50% below European equivalents
• Authorized WKDL distributor with full manufacturer warranty
• Complete documentation: GA drawings, refrigerant piping diagrams, electrical schematics
• Express delivery: stock models 7–10 days; custom configurations 15–20 days
• On-site commissioning support available for orders above 10 units

📩 Need a quotation? Send your requirements to sales@hiqool.com or request a quote online. We respond within 24 hours with pricing, lead time, and technical datasheets.