Tunnel Belt Freezer

Our Tunnel Belt Freezer, designed and manufactured in Lynxcool, China, features a continuous straight-through conveyor belt, ideal for IQF (Instant Quick Freezing) and rapid freezing requirements. The product passes horizontally through a tunnel on a stainless steel mesh belt, where it is rapidly cooled by high-velocity cold air. It is suitable for fish fillets, pizza bases, flatbreads, hamburger patties, coated foods, and single-packaged items.

Compared to spiral freezers, the wide belt design easily achieves high throughput; the straight-through flat belt reduces lateral tension, protects product shape, and supports mid-process inspection.

Key Capabilities

•Straight-through single-pass belt — no helical path; no lateral belt forces; ideal for flat, thin, sheet-form, and tray-loaded products.

•Wide belt options — 500 mm to 2,500 mm belt width; very high throughput per unit of product depth achieved by maximising belt width and loading density.

•Impingement and cross-flow air options — top-down impingement jets for maximum surface heat transfer on flat products; cross-flow for uniform freezing of thicker products.

•Multi-zone air temperature control — independent air temperature and fan speed zones along the tunnel length; surface crust-freeze zone followed by core pull-down zone.

•Modular tunnel sections — standard tunnel sections of 1,000–2,000 mm length assembled to the required total tunnel length; site-assembled for long tunnels.

•Hygienic stainless steel construction — all product-contact surfaces AISI 304 or 316L; full-width access panels along entire tunnel length; belt removable without tools.

•PLC automation — multi-zone belt speed and air temperature control; defrost scheduling; product temperature monitoring; Modbus / BACnet SCADA interface.

Technical Parameters

Application Scope

Fish fillets and pomfret products: Rapid surface crust formation, maximizes bandwidth capacity, 316L anti-corrosion design, suitable for seafood processing.

Pizza bases and bread: Supports wide-bandwidth flat freezing, prevents deformation and cracking, fully frozen in 4–8 minutes.

Coated and breaded foods: High-velocity inlet area quickly fixes the surface coating, reducing the risk of coating slippage.

Hamburger patties and thin meats: Single-layer flat placement, high-capacity wide-band design, protects shape, and ensures even freezing.

Ready-to-eat trays and pallet packaging: Flat tray freezing, supports single-layer or multi-layer configurations, adaptable to different freezing times..

Product Composition and Features

1. Impact Airflow System: High-speed vertical airflow breaks down the boundary layer, resulting in a heat exchange coefficient 3-5 times higher than ordinary cross-flow, significantly shortening freezing time.

2. Multi-Zone Temperature Control: Independent fans and temperature controllers allow for different airflow speeds and temperatures in each zone, achieving high efficiency and energy saving.

3. Modular Tunnel: Standard panel assembly allows for expansion or replacement as needed, flexibly adapting to production line changes.

4. Positive Drive Flat Belt System: Precision sprocket drive prevents slippage, maintains a flat belt width, suitable for high-volume single-layer products.

5. Full-Length Maintenance Panel: Removable for cleaning, with optional CIP spray system for easy and rapid disinfection and maintenance.

6. Energy-Saving Fans and Refrigeration System: EC variable frequency fans match production capacity load, reducing energy consumption and maintaining energy consumption per kilogram comparable to spiral freezers.

Why Choose Lynxcool's Tunnel Belt Freezer?

1. Professional Impingement Airflow Design: CFD-optimized nozzle layout and airflow velocity ensure wide-band, uniform freezing.

2. Modular Expansion for Flexible Growth: Tunnels can be added or relocated, saving on asset costs.

3. Ultra-Wideband, High Capacity: Up to 2,500 mm bandwidth, offering significant advantages in high output and energy efficiency.

4. Application Customization: Independent freezing zone configurations can be designed for each product type, optimizing freezing performance.

5. High Cost-Effectiveness Made in China: 25-40% lower than similar European products, with complete factory testing and CE certification.

FAQ

Q1: When should I choose a Tunnel Belt Freezer instead of a spiral freezer?

A: Tunnel Belt Freezers are suitable for sheet, flat, single-layer, or coated products. Spiral freezers are suitable for three-dimensional or long-term freezing products.

Q2: What are the advantages of shock freezing?

A: High-speed vertical airflow breaks down the surface air boundary layer, making it 2–3 times faster than cross-flow freezing, shortening tunnel length, and saving energy.

Q3: How do I choose the bandwidth of a Tunnel Belt Freezer?

A: Choose based on capacity, product density, and workshop width. Wider bandwidth can significantly increase unit capacity.

Q4: Is the tunnel scalable?

A: Modular sections can be added without replacing the entire machine. The PLC can adjust the belt length and freezing zone.

Q5: How are cleaning and disinfection performed?

A: Fully removable panel and CIP spray system support wet cleaning.

Q6: What is the defrosting method?

A: Standard hot air defrosting, single-zone circulating defrosting without affecting production in other zones.

Q7: Place of manufacture and quality assurance?

A: Manufactured in an ISO 9001 factory in China, CE/EHEDG certified, with complete factory testing and documentation throughout the process.