Aluminium Pipe Coil

Each Aluminium Pipe Coil unit utilizes extruded aluminum alloy finned tubes featuring an "external fin/internal thread" structure. The fins and the tube body are tightly bonded through a single-step molding process, ensuring a permanent metallurgical bond between the two; this effectively eliminates contact thermal resistance between the fins and the tube. Prior to shipment, every unit undergoes rigorous pressure testing using compressed air. Furthermore, the units come standard with an integrated electric defrosting system and a drip tray. Applicable refrigerants include: HFCs (R404A, R507A, R134a, R448A, R449A) and Ammonia (R717).

Key Capabilities

•Fanless natural convection — chimney-effect air circulation through parallel fin channels; zero fan energy consumption; no fan motor heat gain.

•Low product dehydration — low air velocity and high relative humidity in the cold store minimise dry loss of stored food products compared to fan-coil evaporators.

•Small temperature fluctuation — stable cold store temperature with reduced cycling amplitude; improved product quality and shelf life.

•Cold storage effect — the thermal mass of the aluminium evaporator body stores cold energy, reducing compressor start frequency and extending compressor life.

•Outer-fin / inner-thread tube structure — single die-cast pressing; outer fins maximise air-side heat transfer; inner thread reduces refrigerant-side film resistance and refrigerant charge.

•Electric defrost with drip tray — integrated electric heater elements and collection tray; automatic defrost on a time-clock or sensor-triggered basis.

•Ammonia and HFC compatible — aluminium alloy material compatible with both HFC and R717 (ammonia) refrigerants; produced in China to food-hygiene material standards.

Technical Parameters

All aluminium pipe coils are manufactured and pressure-tested in China. Factory documentation includes: compressed air leak test certificate, material compliance declaration (food-hygiene grade aluminium alloy), and dimensional inspection report. Every unit dispatched from our China production facility carries a complete documentation package.

Application Scope

Medium and Low Temperature Cold Stores | −5°C to −30°C

Lynxcool aluminium pipe coils from China provide ceiling-mounted evaporation for meat, poultry, seafood, dairy, fruits, and vegetables. Natural convection keeps high humidity, reducing dehydration and weight loss—better than fan-coil systems.

Fish and Aquatic Product Cold Storage | −15°C to −25°C

Maintain stable low temperatures and high humidity for fish and seafood. Low air velocity reduces moisture loss. Ammonia-compatible for R717 systems.

Pharmaceutical and Medical Cold Stores | +2°C to −20°C

Stable temperature and humidity for pharmaceuticals, vaccines, and biologicals. Aluminium alloy meets pharma-grade hygiene standards.

Fresh Produce and Horticultural Cold Storage | 0°C to −5°C

Fanless design preserves over 90% humidity, preventing wilting and freeze damage for fruits, vegetables, and flowers.

Blast Chilling and Pre-Cooling Rooms | −5°C to −15°C

Ceiling-mounted coils retain moisture, reduce dehydration, and operate quietly—ideal for high-value produce..

Why Partner with Lynxcool

1. Over 20 Years of Experience

Lynxcool has been designing and manufacturing aluminium pipe coils in China for over 20 years. We supply cold store contractors, system integrators, and end users across Asia-Pacific, the Middle East, and beyond.

2. Precision Die-Cast Fin-Tube Manufacturing

CNC-controlled die-cast fins formed integrally with the tube wall.

Eliminates heat transfer loss from mechanical expansion.

Every coil is pressure-tested and comes with a factory-issued leak certificate.

3. Thermal Design and Sizing Support

Full cold store heat load calculation and thermal sizing.

Optimized tube diameter, fin pitch, and circuit layout for ceiling space.

Refrigerant charge estimates and layout drawings provided by our China-based engineers.

4. Food-Hygiene Grade Materials

Aluminium alloy with anodized or special surface treatment.

Meets Chinese and international food contact standards.

Inner tubes cleaned before assembly; compliance declaration included.

5. Ammonia Compatibility

Fully compatible with R717 ammonia refrigeration.

All-aluminium fittings and connections; no copper components.

Suitable for large food processing and cold chain facilities.

6. Competitive China-Origin Pricing

High-quality, food-hygiene certified coils at competitive prices.

Full factory documentation: leak test certificate, material declaration, installation manual, defrost wiring diagram.

Short lead times for repeat OEM orders with maintained production tooling..

Certifications

•ISO 9001 — Quality Management System, China production facility

•Food-hygiene grade aluminium alloy — material compliance declaration per unit

•Factory compressed air leak test — 100% tested; certificate issued per unit

•GB/T 15912 — China National Standard for Aluminium and Aluminium Alloy Finned Tubes

•Compatible with GB 50072 — China Code for Design of Cold Storage (Q = K·A·Δt calculation basis)

•CE / PED compliant configurations available for European market export

•Ammonia-rated (R717) configurations available with all-aluminium fittings

Case

•Tens of thousands of aluminium pipe coil units produced in China and installed globally

•Supplied to cold store contractors, food processing plants, fishery facilities, and pharmaceutical cold chains across Asia-Pacific and the Middle East

•Both HFC and ammonia refrigerant systems served

•98% on-time delivery from our China production facility

•Standard warranty: 24 months from date of dispatch against manufacturing defects

FAQ

Q1: What is the chimney effect, and why is it important?

A: The chimney effect is natural convection in a aluminium pipe coil cold store. Cold air descends through vertical fin channels while warm air rises, enabling efficient heat transfer without fans. Correct installation—150–200 mm ceiling clearance and level hanging—ensures continuous natural circulation.

Q2: How do I calculate the required heat transfer area?

A: Use the formula A = Q / (K · Δt), where K = 9–10 W/m²°C and Δt ≈ 10°C. Then select tube diameter and fin type:

φ25 2-fin = 0.29 m²/m

φ32 2-fin = 0.34 m²/m

φ32 3-fin = 0.495 m²/m

Our China-based engineers can perform full calculations for your project.

Q3: Why limit single-pass tube length?

A: Excessive length increases pressure drop, reducing cooling capacity. Limits: φ25 = 80 m, φ32 = 100 m. For larger stores, use multiple shorter parallel passes with Venturi liquid distributor branches.

Q4: Can aluminium pipe coils be used with ammonia (R717)?

A: Yes. Aluminium is fully ammonia-compatible. Lynxcool produces ammonia-rated coils in China with all-aluminium fittings and full pressure testing. Copper must not be used.

Q5: When and how should I defrost?

A: Recommended triggers: feathery frost ≥10 mm or hard ice ≥5 mm. Typically 2–4 cycles per 24 hours, using electric heaters. Defrost ends via surface temperature sensor or timer. Manual defrost is possible for unusual conditions.

Q6: What is a Venturi liquid distributor?

A: A nozzle device at each branch inlet that ensures even refrigerant distribution using the Venturi effect. Prevents flooding or starving of tubes, improving evaporator efficiency and preventing liquid hammer.

Q7: How does an aluminium pipe coil compare to a fan-coil evaporator?

A: Fan-coils pull down temperature faster and save ceiling space. Aluminium pipe coils use zero fan energy, maintain higher humidity (90–95% vs. 75–85%), reduce product dry loss, and stabilize temperature. Ideal for premium food, pharmaceutical, and high-humidity applications.