The Cryo Spiral freezers are advanced machines used for rapidly freezing food products using liquid nitrogen or carbon dioxide. By reaching extremely low temperatures, they enable quick freezing, which preserves the texture, taste, and nutritional value of the products. They are energy-efficient, utilize space effectively and can freeze a wide range of products, including fruits, vegetables, meat, fish, and ready meals. The spiral design allows for high throughput in a compact footprint, offering high-quality freezing.
Wide range of sizes available
Dohmeyer’s Cryo Spiral is engineered for continuous, large-scale processing, delivering throughput rates of up to 5,000 kg per hour. Utilizing liquid nitrogen (LN₂) or liquid carbon dioxide (LCO₂), the system achieves rapid temperature drops that promote the formation of micro-crystals. This prevents cell wall rupture, locking in moisture, texture, and structural profile - crucial for high-value items like raw meat, seafood, and bakery products. The continuous spiral mechanism ensures consistent cryogenic gas exposure across all product surfaces, making it a reliable solution for high-capacity Individually Quick Frozen (IQF) lines requiring strict quality control.
Floor space and product yield are critical metrics in industrial processing. The Cryo Spiral features a vertically stacked belt configuration that reduces the required footprint by up to 75% compared to conventional mechanical tunnel freezers. Beyond spatial efficiency, the system utilizes rapid crust-freezing to seal product surfaces immediately upon entry. This process limits dehydration losses to under 0.5%, compared to the 3-5% weight loss typical in mechanical freezing. Combined with an isothermal design that improves heat transfer efficiency by 15%, the Cryo Spiral directly preserves sellable yield and maximizes facility output.
Operating with cryogens at –196°C (LN₂) or –78°C (LCO₂) requires rigorous safety architecture. The Cryo Spiral integrates an N+1 redundant safety loop, providing an independent backup to the primary control circuit to ensure a safe shutdown in the event of a sensor failure. The cryogen delivery network is built around a vacuum-insulated manifold with integrated safety valves, designed to relieve pressure directly back to the storage tank if anomalies occur. Additionally, the system interfaces directly with factory exhaust networks to safely evacuate spent gases, preventing oxygen depletion and ensuring a secure environment for operators.
Food safety compliance drives the engineering of the Cryo Spiral. Following a strict "clean-by-design" methodology, the unit eliminates the internal evaporators and complex ductwork where biofilms typically form in mechanical systems. The core features a fully welded stainless steel drum with no dead corners or exposed internal threads. All interior surfaces are sloped to direct wash water to specific drainage points, preventing liquid pooling. Rated for IP69K, the mechanical and electrical components withstand high-pressure, high-temperature sanitation protocols, minimizing cleaning downtime and ensuring compliance with stringent food safety audits.
Production lines must often accommodate multiple product profiles. The Cryo Spiral is equipped with a servo-driven gearbox, offering precise control over belt speeds. Operators can adjust the freezing dwell time from 20 minutes for delicate berries to up to 4 hours for dense meat blocks. The system’s dual-fluid injection infrastructure allows facilities to switch between LN₂ and LCO₂ based on local gas availability, operational costs, or specific process requirements. Managed through an integrated PLC and HMI, operators can store and instantly recall pre-set freezing recipes, ensuring operational repeatability across varying production runs.
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