High Efficiency DD60 Medium Temperature Air Cooler Anti-Frost Evaporator Less Defrost Times for Frozen Food Cold Room

DD60 fin-type air cooler belongs to medium-temperature refrigeration evaporator hardware, a mainstream forced-air heat exchange component matched with condensing units, widely installed in frozen food storage, meat cold warehouses and commercial refrigeration facilities maintaining -15℃~-20℃ operating temperature. It follows vapor compression refrigeration logic to absorb indoor ambient heat and lower warehouse temperature. Detailed product analysis is shown below:

DD60 unit cooler undertakes the evaporation stage of the full refrigeration loop, relying on refrigerant phase change (liquid refrigerant evaporating into gaseous state) to finish indoor heat removal, step-by-step operation explanation:

• Evaporation heat absorption process: Low-pressure low-temperature gas-liquid refrigerant mixture delivered via the thermal expansion valve flows into the internal copper coil of DD60. The liquid refrigerant vaporizes while absorbing ambient heat inside the cold room; built-in axial fans force air to pass across the aluminum fin surface to deliver uniformly cooled airflow throughout storage space, steadily bringing down cold room temperature to the preset frozen temperature range.
• Defrost circulation trigger: Frost gradually accumulates on 6mm spaced fins during long-duration low-temperature running, which weakens heat exchange efficiency. The embedded electric heating defrost assembly activates automatically, melting accumulated frost into wastewater drained out via the bottom drip tray, restoring the coil’s original heat transfer performance.
• Gas refrigerant circulation: Low-pressure gaseous refrigerant produced after heat absorption gets drawn toward the connected condensing unit’s compressor. The refrigerant proceeds through compression, condensation and throttling procedures inside the external condensing set, then re-enters the DD60 cooler to sustain continuous refrigeration circulation.
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• Outer dimensional parameters: Side profile sizing is 580mm (depth) * 700mm (height); front overall length reaches 1730mm, top mounting span measures 1440mm, designed for ceiling hoisting installation inside cold storage. The unit equips two large-diameter axial fans to deliver ample air circulation volume for medium-size frozen warehouses.
• Heat exchange assembly: Adopts 6.0mm fin spacing tailored for medium-temperature frozen scenarios. Moderate fin clearance strikes a balance between total heat exchange area and frost resistance, cutting down frequent defrost demands at -15℃~-20℃ operating conditions. High-grade grooved copper tubing reinforces heat transfer capability.
• Shell & auxiliary hardware: Corrosion-resistant metal casing with powder coating adapts to the damp environment inside cold rooms; a sealed drain pan prevents melted frost water leakage; the electrical junction box on the right side offers reliable wiring protection for fan motors and defrost heating tubes