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The Evaporator for Freezing is a high-performance heat exchanger designed for low-temperature applications. It excels in freezing tunnels, blast freezers, and industrial refrigeration systems, providing rapid heat extraction and stable operation at sub-zero temperatures. Its robust construction ensures reliability in continuous-operation environments, where downtime directly impacts production efficiency.
The evaporator achieves evaporation temperatures as low as -40°C with a coefficient of performance (COP) of 3.2—measured at -30°C evaporating temperature. Its enhanced fin geometry—with 0.3mm-thick aluminum fins spaced 6mm apart—increases surface area by 25%, improving ice formation resistance compared to standard fin designs .
The unit integrates hot gas defrosting (using refrigerant from the compressor discharge) and electric heating elements (500W per zone) to minimize downtime. The self-diagnostic system—equipped with infrared sensors—detects frost buildup (≥3mm) and initiates defrost cycles automatically, with adjustable cycle parameters based on operating conditions.
The galvanized steel casing (zinc coating thickness ≥80μm) and copper-nickel tubes (90/10 alloy) resist corrosion in humid environments with 90%+ relative humidity. The vibration-dampening design—including rubber mounts and reinforced tubing—ensures quiet operation (≤55 dB) in noise-sensitive areas like food processing plants.
With fans delivering up to 20,000 m³/h—variable speed controlled via inverter—the evaporator ensures uniform temperature distribution (±1°C) across large freezing chambers (up to 500m³). Fan blades are aerodynamically designed to minimize energy consumption at partial load.
Food Processing: Used in meat, seafood, and bakery freezing lines, enabling rapid freezing (from 25°C to -18°C in 90 minutes for 5kg meat cuts).
Pharmaceuticals: Maintains ultra-low temperatures (-25°C to -40°C) for vaccine storage, compliant with WHO cold chain standards.
Chemical Industry: Handles cryogenic liquids (e.g., liquid nitrogen precooling) in research and production, supporting laboratory-scale to industrial processes.
HVAC: Supports low-temperature air conditioning in cold storage facilities, such as pharmaceutical warehouses and frozen food distribution centers.
Q: How does the defrosting system work?
A: The hot gas bypass redirects refrigerant vapor (80–100°C) through the evaporator coils to melt frost, while electric heaters prevent ice formation on critical components like fan blades. The process reduces defrost time by 50% (to 15–20 minutes) compared to manual methods, with minimal temperature rise in the freezing chamber .
Q: What is the maximum frost thickness the evaporator can handle?
A: The unit efficiently operates with frost layers up to 5 mm. Beyond this, the defrost system activates to maintain performance, with a safety cutoff if frost exceeds 8mm to prevent coil damage.
Q: Can the evaporator be used in ammonia systems?
A: Yes. The ammonia-compatible design—with brass fittings and ammonia-resistant gaskets—ensures leak-free operation and meets ASME BPVC standards for pressure vessels. It is certified for use with R717 refrigerant in industrial refrigeration systems.
