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The 9.53Φ Tube Hydrophilic Aluminum Foil Evaporator is a specialized heat exchanger featuring 9.53mm diameter copper tubes and hydrophilic aluminum fins, designed for high-efficiency heat transfer in HVAC and refrigeration systems. The 9.53mm tube size balances refrigerant flow rate and pressure drop, while the hydrophilic foil enhances condensate management, reducing airflow resistance. This evaporator is widely used in split air conditioners, dehumidifiers, and commercial refrigerators requiring compact design and reliable performance.
The 9.53mm copper tubes (wall thickness 0.3–0.5mm) provide a refrigerant flow rate of 0.05–0.15 m³/h (R32 refrigerant), balancing heat transfer and pressure drop (≤0.06 bar). This diameter is standard in residential and light commercial HVAC, ensuring compatibility with most system designs.
The fins are coated with a zirconium-based hydrophilic layer that spreads condensate into a thin, uniform film (instead of droplets), reducing airflow resistance by 20% and improving heat exchange efficiency by 8–12% . The coating also resists mold growth (tested to ASTM G21 standards) in humid environments.
With a fin density of 14–20 fins per inch and corrugated fin design, the evaporator achieves a heat transfer coefficient of 3,800 W/(m²·K). The tube-fin contact (expanded tube technology) ensures 95%+ thermal conductivity between copper and aluminum.
The aluminum foil undergoes chromate conversion treatment, withstanding 500 hours of salt spray testing (ASTM B117) without significant corrosion. Copper tubes are degreased and passivated to prevent oxidation during storage and installation.
The evaporator functions efficiently at evaporation temperatures of -15°C to 10°C and handles refrigerant pressures up to 2.5 MPa, suitable for air conditioning (10°C evaporation) and medium-temperature refrigeration (0–5°C).
Residential AC: Used in split-system indoor units (cooling capacity: 1.5–5 kW) for homes and apartments.
Commercial Refrigeration: Integrated into display coolers (supermarkets) and beverage refrigerators (cafes) to maintain 2–8°C.
Dehumidifiers: Enhances moisture removal (10–30 liters/day) in basements and industrial storage areas.
Automotive HVAC: Installed in electric vehicle air conditioners due to its compact size and lightweight design.
Q: Why is 9.53mm the optimal tube diameter for this evaporator?
A: Smaller diameters (e.g., 7mm) increase pressure drop, while larger diameters (e.g., 12mm) reduce refrigerant velocity, lowering heat transfer. 9.53mm balances both, achieving 5–7% higher efficiency than 7mm tubes in 1.5–5 kW AC systems .
Q: How long does the hydrophilic coating last?
A: With proper maintenance (annual cleaning), the coating retains effectiveness for 8–10 years. It is resistant to UV radiation and thermal cycling (-30°C to 80°C), ensuring consistent condensate management over the evaporator’s lifespan.
Q: Can this evaporator be used in low-temperature refrigeration (<-10°C)?
A: It is not recommended, as the hydrophilic coating’s performance diminishes below -10°C (condensate freezes into ice, blocking airflow). For low temperatures, a low-temperature evaporator with anti-frost fins is more suitable.
