Aluminium Flat Plate Freezing Shelf

Lynxcool's Aluminium Flat Plate Freezing Shelf is designed for industrial customers seeking high efficiency, reliability, and cost-effectiveness. The system utilizes multi-layered hollow die-cast aluminum plates, with refrigerant circulating directly on the plates, which are mounted on independent galvanized or stainless steel supports. Freezing is achieved through direct conduction, eliminating the need for fans, forced airflow, or any moving parts, thus avoiding fan energy consumption, motor heat, and noise.

We supply these freezing racks to fishing vessels, shore-based fish processing plants, meat cold storage, blast freezers, and pharmaceutical cold storage facilities worldwide. Our aluminum construction combines excellent thermal conductivity with lightweight durability, while the fanless design maintains humidity and significantly reduces energy costs. Each unit meets food-grade material standards, is factory pressure-tested, and is compatible with R404A, R507A, R448A, R449A, R22, and R717 (ammonia) refrigerants.

Technical Features

1.Precision Die-Cast Aluminium Plates

Our plates are CNC die-cast from AA3003 aluminium alloy, featuring seamless, parallel refrigerant channels. This monolithic design eliminates common failure points, ensuring long-term reliability. Each plate is rigorously tested for flatness and pressure integrity, ensuring consistent performance.

2.Direct Conduction Freezing

We use direct conduction for faster freezing. Heat transfers directly from the product through the aluminium plate to the refrigerant, bypassing air resistance. With aluminium's superior thermal conductivity, we achieve 20-35% energy savings compared to traditional fan-coil systems, while providing faster freezing from the bottom up.

3.Custom Multi-Tier Rack Structures

Designed to fit your specific needs, our racks range from 3–10 tiers with customizable plate sizes (1000–3000 mm in length) and tier spacing (100–500 mm). This vertical design maximizes freezing surface area, optimizing cold storage capacity and saving valuable floor space.

4.Cold Storage Thermal Mass

Our Aluminium Flat Plate Freezing Shelf store cold energy, reducing compressor start frequency and peak energy demand. This improves system efficiency, providing stable temperatures and prolonging equipment life, especially for temperature-sensitive products like seafood and pharmaceuticals.

5.Integrated Electric Defrost

Each shelf is equipped with electric defrost elements and stainless steel drip trays. Defrost cycles are triggered based on time or frost sensors, ensuring efficient meltwater removal and maintaining optimal heat transfer performance.

6.Ammonia Compatibility and Food Hygiene

Our units are ammonia (R717) compatible and built with food-grade aluminium and stainless steel for durability and safety. They meet international food hygiene standards, with full material compliance documentation to support your certification and audit needs.

Technical Parameters

Application Scope

1.Fishing Vessel Refrigeration

Lynxcool's aluminum flat-plate freezer racks are designed specifically for fishing vessels, providing rapid freezing to ensure whole fish, gutted fish, and fish fillets are frozen immediately after catch. Utilizing direct conduction freezing and a lightweight design, they are compatible with ammonia (R717) and HFC refrigerants, meeting vessel weight management requirements and adapting to harsh marine environments.

2.Blast Freezing Units

Blast freezing units suitable for meat, fish, and ready-to-eat meals improve freezing efficiency through direct contact with the product. Cold air circulation ensures uniform freezing of the product surface. Available in standard and custom sizes, they perfectly suit industrial freezing needs.

3.Medium and Low Temperature Cold Storage

This product replaces traditional passive racks, directly contacting frozen products and improving refrigeration efficiency. The thermal mass of the freezer racks effectively mitigates temperature fluctuations during defrosting and door opening, perfectly matching existing cold storage architecture.

4.Pharmaceutical and Biological Product Refrigeration

Lynxcool's aluminum flat-plate freezer racks ensure stable temperatures for pharmaceuticals, vaccines, and biological samples stored on trays. Direct contact with the freezing plate prevents temperature fluctuations, meets pharmaceutical industry cleanliness standards, and complies with standard cold storage hygiene requirements.

5.Shore-based Fish Processing

This product is used as a cooling platform in shore-based fish processing to ensure rapid cooling of fish during processing and prevent bacterial growth. It uses a 316L stainless steel frame and aluminum alloy plates, offering strong corrosion resistance and adaptability to harsh marine processing environments.

Why Partner with Lynxcool

Lynxcool has been designing and manufacturing the Aluminium Flat Plate Freezing Shelf in China for over 20 years, supplying fishing vessel outfitters, cold store contractors, food processing plant engineers, and pharmaceutical facility designers across Asia-Pacific, the Middle East, and beyond. Our aluminium plate production line uses CNC-controlled die-cast equipment and dedicated pressure test stations to ensure consistent plate quality and refrigerant integrity across every unit produced in China. Below are the key reasons customers choose Lynxcool as their aluminium flat plate freezing shelf partner.

Certifications and Standards

•ISO 9001 — Quality Management System, China production facility

•Factory compressed air pressure test — 100% per plate at 1.5× design pressure; certificate issued

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

•GB/T 15912 — China National Standard for Aluminium and Aluminium Alloy Finned Tubes (applicable to channel geometry)

•Compatible with GB 50072 — China Code for Design of Cold Storage

•CE / PED compliant configurations available for European market export

•Ammonia (R717) rated configurations available — all-aluminium circuit; no copper or copper alloys

•Marine-rated configurations — vibration-resistant connections; corrosion-protected rack frames

Frequently Asked Questions

Q: How does an aluminium flat plate freezing shelf differ from an aluminium pipe coil evaporator?

A:Both are fanless, natural convection evaporators made from aluminium, but they operate differently. The pipe coil uses natural air convection through fin channels to cool the room air, making it ideal for ambient cooling. The flat plate shelf, however, relies on direct heat conduction from the product to the refrigerant, offering superior efficiency when products are in direct contact with the plate, such as flat-bottomed items.

Q: What products are best suited to aluminium flat plate freezing shelves?

A: Ideal products include flat-bottomed items like whole, gutted, or filleted fish, boxed or tray-packed foods, and portioned items in flat containers. Irregularly shaped products, like meatballs or loose vegetables, benefit more from a pipe coil or fan-coil evaporator.

Q: Can the aluminium flat plate shelf be used with ammonia (R717)?

A: Yes, aluminium is compatible with ammonia, unlike copper. Lynxcool offers ammonia-rated aluminium plates with ammonia-compatible components, pressure-tested to the same standard as HFC units.

Q: How do I defrost the plates, and how often is defrost needed?

A:Electric defrost is standard, using heating elements to raise plate temperatures above 0°C. Defrost frequency is typically once or twice a day, adjustable based on application needs. Meltwater drains into a tray and is routed out.

Q: What rack dimensions are available, and can custom sizes be made?

A: The standard Aluminium Flat Plate Freezing Shelf ranges in length from 1000 mm to 3000 mm, width from 500 mm to 1500 mm, and height from 1500 mm to 1500 mm. We can provide custom configurations based on cold storage or product dimensions, and provide dimensional diagrams and refrigerant diagrams.